CN103338167B - The channel correcting method of long-distance radio frequency unit and relevant device and system - Google Patents

Abstract

The embodiment of the invention discloses the channel combined bearing calibration of a kind of long-distance radio frequency unit and relevant device and system。The technical scheme that the embodiment of the present invention provides passes through the service channel of a RRU and the mutual correction signal of correction reference channel of the 2nd RRU, obtain for carrying out the penalty coefficient of channel compensation between RRU according to mutual correction signal, self-tuning RRU carries out service signal compensation in conjunction with penalty coefficient, is conducive to meeting the requirement of the spliced up-downgoing reciprocity of multiple RRU。This mechanism can realize being undertaken multiple RRU splicing to obtain more service channel RRU, so, is conducive to meeting higher communication requirement, is conducive to taking into account cost and System Expansion demand。Such as existing two 2T2R are spliced into 1 4T4R, are so that existing investment is reasonably utilized。

Description

The channel correcting method of long-distance radio frequency unit and relevant device and system

This application claims within 31st, submit to Patent Office of the People's Republic of China, application number to be 201210592421.9 in December in 2012, denomination of invention is the priority of Chinese patent application of " channel correcting method of long-distance radio frequency unit and relevant device and system ", its full content is hereby incorporated by the application。

Technical field

The present invention relates to communication technical field, be specifically related to the channel correcting method of long-distance radio frequency unit and relevant device and system。

Background technology

Time division duplex (TDD, TimeDivisionDuplexing) in system, base station is passed through to detect user terminal (UE, UserEquipment) detection reference signal (SRS sent, SoundingReferenceSignal) signal, up channel is estimated, and utilize TDD system up-downgoing channel reciprocity, uplink channel estimation result is carried out wave beam forming as down channel estimated result。

Although in theory, TDD system up-downgoing channel is reciprocity, but up-downgoing channel introduces the radio-frequency channel that base station is different respectively in systems in practice, the response of these radio-frequency channels is probably different, and this is accomplished by by the means of channel correcting, these passages being compensated。Theory analysis finds, only needs the ratio of the uplink/downlink radio-frequency channel response that each antenna of base station is corresponding to be equal to same value, it is possible to meet the requirement of base station beam figuration。Base station can include long-distance radio frequency unit (RRU, RemoteRadioUnit) and Base Band Unit (BBU, BaseBandUnit), and RRU and BBU can cooperate channel correcting, and then realizes wave beam forming。

Along with the increase of dilatation demand, the base station with more transceiver channel more can meet demand。That adopted before such as is the RRU (namely RRU exists 2 transmission channels and 2 reception passages) of 2T2R, later stage is along with the needs of dilatation, find that the RRU (namely RRU exists 4 transmission channels and 4 reception passages) of 4T4R could better meet demand, if all changing to 4T4R under this scene, then the cost of investment of the RRU of existing 2T2R just wastes。

Summary of the invention

The embodiment of the present invention provides RRU channel correcting method and relevant device and system, to taking into account cost and System Expansion demand。

First aspect present invention provides a kind of channel combined bearing calibration of RRU, it may include:

Perform the passage self-correcting of the 2nd RRU, receive self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second；

By the correction of described 2nd RRU with reference to receiving passage, receive the first correction signal being sent out channel emission by first business of a RRU, according to by the correction of described 2nd RRU with reference to receive channel reception to described first correction signal estimate the first channel response, and obtain the first penalty coefficient according to described first channel response；

By the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, and receive the second penalty coefficient, wherein, described second penalty coefficient obtains based on second channel response, the response of described second channel be to by first business of a described RRU receive channel reception to described second correction signal carry out channel estimating and obtain；

Receive self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, receive correction coefficient by the described 2nd RRU service signal received based on described second to be corrected, be corrected from correction coefficient based on described second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, it is corrected based on described second correction coefficient by the described 2nd RRU service signal launched, is received by the described 2nd RRU service signal received and be corrected based on described second receipts self-correcting coefficient。

In conjunction with first aspect, in the embodiment that the first is possible, the passage self-correcting of described execution the 2nd RRU, receive self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second, including: perform the passage self-correcting of the 2nd RRU, each business to obtain described 2nd RRU send out each subcarrier of passage corresponding second from correction coefficient, and each business obtaining described 2nd RRU receive each subcarrier of passage corresponding second receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k2,i}^{UL}\left(n\right)=\frac{1}{h_{k2}^{ct}\left(n\right)h_{k2,i}^r\left(n\right)};{\mathrm{\β}}_{k2,i}^{DL}\left(n\right)=\frac{1}{h_{k2}^{cr}\left(n\right)h_{k2,i}^t\left(n\right)};$

Wherein, described k2 represents the numbering of the 2nd RRU, described inRepresent that the business of the 2nd RRU receives passage i channel response on subcarrier n, described inRepresent that the described correction of the 2nd RRU is with reference to receiving passage channel response on subcarrier n, described inRepresent that the described correction of the 2nd RRU is with reference to sending out passage channel response on subcarrier n, described inRepresent that the business of the 2nd RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of described 2nd RRU receives second corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of described 2nd RRU sends out corresponding for subcarrier n second of passage i from correction coefficient。

The first possible embodiment in conjunction with first aspect or first aspect, in the embodiment that the second is possible, described based on described first penalty coefficient, described second penalty coefficient and described second receive self-correcting coefficient obtain the second receipts correction coefficient, including: by described second penalty coefficient divided by described first penalty coefficient to obtain first-phase to penalty coefficient, receive self-correcting coefficient by described second and be multiplied by described first-phase to penalty coefficient to obtain the second receipts correction coefficient；Or, by described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, by described second receive self-correcting coefficient divided by described second-phase to penalty coefficient to obtain the second receipts correction coefficient。

The first possible embodiment in conjunction with first aspect or first aspect, in the embodiment that the third is possible, described obtain second correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second from correction coefficient, including: by described second penalty coefficient divided by described first penalty coefficient to obtain first-phase to penalty coefficient, by described second from correction coefficient divided by described first-phase to penalty coefficient to obtain second correction coefficient；Or, by described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, it is multiplied by described second-phase to penalty coefficient to obtain second correction coefficient by described second from correction coefficient。

Second aspect present invention provides a kind of channel combined bearing calibration of RRU, it may include:

Perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；

Receiving passage for reference with the first business, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, wherein, described first business is received one of them business that passage is a described RRU and is received passage；

Sending out passage for reference with the first business, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, described first business is sent out one of them business that passage is a described RRU and is sent out passage；Wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；

Channel emission the first correction signal is sent out by described first business of a described RRU；

Passage is received by described first business of a described RRU, receive by the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, according to by described first business receive channel reception to described second correction signal estimate second channel response, and obtain the second penalty coefficient according to the response of described second channel, transmit described second penalty coefficient to described 2nd RRU own base station。

In conjunction with second aspect, in the embodiment that the first is possible, the passage self-correcting of described execution the oneth RRU, receives self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first, including: perform the passage self-correcting of a RRU, each business to obtain a described RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a described RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, described k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

The first possible embodiment in conjunction with second aspect or second aspect, in the embodiment that the second is possible, described with the first business receipts passage for reference, the business of a described RRU is received passage carry out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}=\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)};$

Wherein, described p represents the numbering in the first business collection of letters road, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

In conjunction with the embodiment that the first possible embodiment of second aspect or second aspect or the second of second aspect are possible, in the embodiment that the third is possible, described send out passage for reference with the first business, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, described p represents that the first business sends out the numbering of passage, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

The embodiment possible in conjunction with the first possible embodiment of second aspect or second aspect or the second of second aspect or the third possible embodiment of second aspect, in the 4th kind of possible embodiment, described method also includes:

Channel emission the 3rd correction signal is sent out by described first business of a described RRU；

Receive channel reception by described first business of a described RRU and sent out the 4th correction signal of channel emission by the 3rd business of described 3rd RRU, according to by described first business receive channel reception to described 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to described 4th channel response, transmit described 4th penalty coefficient to described 3rd RRU own base station。

4th kind of possible embodiment of the embodiment possible in conjunction with the first possible embodiment of second aspect or second aspect or the second of second aspect or the third possible embodiment of second aspect or second aspect, in the 5th kind of possible embodiment

Described method also includes:

Channel emission the 5th correction signal is sent out by the 4th business of a described RRU；

Receive channel reception by the 4th business of a described RRU and sent out the 6th correction signal of channel emission by the 5th business of described 4th RRU, according to by described 4th business receive channel reception to described 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to described 6th channel response, transmit described 6th penalty coefficient to described 4th RRU own base station；

The service signal of a described RRU receives and is corrected including based on described first receipts correction coefficient:

Each business of a described RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a described RRU receiving passage corresponding based on each business is corrected；

The service signal transmitting of a described RRU is corrected including based on described first correction coefficient:

Each business of a described RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a described RRU and is corrected。

Third aspect present invention provides a kind of RRU channel correcting device, including:

Self-level unit, for performing the passage self-correcting of the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second；

First receives unit, for receiving passage by the correction reference of described 2nd RRU, receives the first correction signal being sent out channel emission by first business of a RRU；

Estimation unit, for according to by the correction of described 2nd RRU with reference to receive channel reception to described first correction signal estimate the first channel response, and obtain the first penalty coefficient according to described first channel response；

Transmitter unit, for sending out the second correction signal of channel emission by the correction reference of described 2nd RRU；

Second receives unit, for receiving the second penalty coefficient, wherein, described second penalty coefficient obtains based on second channel response, the response of described second channel be to by first business of a described RRU receive channel reception to described second correction signal carry out channel estimating and obtain；

Correction unit, for receiving self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, receive correction coefficient by the described 2nd RRU service signal received based on described second to be corrected, be corrected from correction coefficient based on described second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, it is corrected based on described second correction coefficient by the described 2nd RRU service signal launched, is received by the described 2nd RRU service signal received and be corrected based on described second receipts self-correcting coefficient。

In conjunction with the third aspect, in the embodiment that the first is possible, described self-level unit, specifically for performing the passage self-correcting of the 2nd RRU, each business to obtain described 2nd RRU send out each subcarrier of passage corresponding second from correction coefficient, and obtain described 2nd RRU each business receive passage each subcarrier corresponding second receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k2,i}^{UL}\left(n\right)=\frac{1}{h_{k2}^{ct}\left(n\right)h_{k2,i}^r\left(n\right)};{\mathrm{\β}}_{k2,i}^{DL}\left(n\right)=\frac{1}{h_{k2}^{cr}\left(n\right)h_{k2,i}^t\left(n\right)};$

Wherein, described k2 represents the numbering of the 2nd RRU, described inRepresent that the business of the 2nd RRU receives passage i channel response on subcarrier n, described inRepresent that the described correction of the 2nd RRU is with reference to receiving passage channel response on subcarrier n, described inRepresent that the described correction of the 2nd RRU is with reference to sending out passage channel response on subcarrier n, described inRepresent that the business of the 2nd RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of described 2nd RRU receives second corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of described 2nd RRU sends out corresponding for subcarrier n second of passage i from correction coefficient。

The first possible embodiment in conjunction with the third aspect or the third aspect, in the embodiment that the second is possible, described correction unit specifically for, receive self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, including: by described second penalty coefficient divided by described first penalty coefficient to obtain first-phase to penalty coefficient, receive self-correcting coefficient by described second and be multiplied by described first-phase to penalty coefficient to obtain the second receipts correction coefficient；Or, by described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, by described second receive self-correcting coefficient divided by described second-phase to penalty coefficient to obtain the second receipts correction coefficient；

Or,

Described correction unit specifically for, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, including: by described second penalty coefficient divided by described first penalty coefficient to obtain first-phase to penalty coefficient, by described second from correction coefficient divided by described first-phase to penalty coefficient to obtain second correction coefficient；Or, by described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, it is multiplied by described second-phase to penalty coefficient to obtain second correction coefficient by described second from correction coefficient。

Fourth aspect present invention provides a kind of RRU channel correcting device, including:

Self-level unit, for performing the passage self-correcting of a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；

First relative correction unit, for receiving passage for reference with the first business, the business of a described RRU being received passage carry out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, wherein, described first business is received one of them business that passage is a described RRU and is received passage；

Second relative correction unit, passage is sent out for reference with the first business, the business of a described RRU being sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, described first business is sent out one of them business that passage is a described RRU and is sent out passage；Wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；

First transmitter unit, for sending out channel emission the first correction signal by described first business of a described RRU；

Receive unit, for receiving passage by described first business of a described RRU, receive by the correction of described 2nd RRU with reference to the second correction signal sending out channel emission,

Estimation unit, for according to described reception unit by described first business receive channel reception to described second correction signal estimate second channel response, and according to described second channel respond obtain the second penalty coefficient；

Second transmitter unit, for transmitting described second penalty coefficient to described 2nd RRU own base station。

In conjunction with fourth aspect, in the embodiment that the first is possible,

Described self-level unit specifically for, perform the passage self-correcting of a RRU, each business to obtain a described RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a described RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, described k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

The first possible embodiment in conjunction with fourth aspect or fourth aspect, in the embodiment that the second is possible, first relative correction unit, specifically in the following way, passage is received for reference with the first business, the business of a described RRU is received passage carry out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, wherein

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}=\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)};$

Wherein, described p represents the numbering in the first business collection of letters road, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

In conjunction with the embodiment that the first possible embodiment of fourth aspect or fourth aspect or the second of fourth aspect are possible, in the embodiment that the third is possible,

Described second relative correction unit, specifically in the following way, sending out passage for reference with the first business, sends out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient the business of a described RRU, wherein,

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, described p represents that the first business sends out the numbering of passage, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

The embodiment possible in conjunction with the first possible embodiment of fourth aspect or fourth aspect or the second of fourth aspect or the third possible embodiment of fourth aspect, in the 4th kind of possible embodiment, described first transmitter unit is additionally operable to, and sends out channel emission the 3rd correction signal by described first business of a described RRU；

Described reception unit is additionally operable to, and receives channel reception by described first business of a described RRU and is sent out the 4th correction signal of channel emission by the 3rd business of described 3rd RRU,

Described estimation unit is additionally operable to, according to by described first business receive channel reception to described 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to described 4th channel response；

Described second transmitter unit is additionally operable to, and transmits described 4th penalty coefficient to described 3rd RRU own base station。

4th kind of possible embodiment of the embodiment possible in conjunction with the first possible embodiment of fourth aspect or fourth aspect or the second of fourth aspect or the third possible embodiment of fourth aspect or fourth aspect, in the 5th kind of possible embodiment

Described first transmitter unit is additionally operable to, and sends out channel emission the 5th correction signal by the 4th business of a described RRU；

Described reception unit is additionally operable to, and receives channel reception by the 4th business of a described RRU and is sent out the 6th correction signal of channel emission by the 5th business of described 4th RRU,

Described estimation unit is additionally operable to, according to by described 4th business receive channel reception to described 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to described 6th channel response；

Described second transmitter unit is additionally operable to, and transmits described 6th penalty coefficient to described 4th RRU own base station；

Wherein, each business of a described RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a described RRU receiving passage corresponding based on each business is corrected；Each business of a described RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a described RRU and is corrected。

Fifth aspect present invention provides a kind of communication system, including:

First base station, for performing the passage self-correcting of a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；Receiving passage for reference with the first business, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, wherein, described first business is received one of them business that passage is a described RRU and is received passage；Sending out passage for reference with the first business, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, described first business is sent out one of them business that passage is a described RRU and is sent out passage；Wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；Channel emission the first correction signal is sent out by described first business of a described RRU；Passage is received by described first business of a described RRU, receive by the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, according to by described first business receive channel reception to described second correction signal estimate second channel response, and obtain the second penalty coefficient according to the response of described second channel, transmit described second penalty coefficient to the second base station belonging to described 2nd RRU；

Described second base station, for performing the passage self-correcting of the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second；By the correction of described 2nd RRU with reference to receiving passage, receive the first correction signal being sent out channel emission by first business of a RRU, according to by the correction of described 2nd RRU with reference to receive channel reception to described first correction signal estimate the first channel response, and obtain the first penalty coefficient according to described first channel response；By the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, and receive described second penalty coefficient that described first base station sends；Receive self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein receive correction coefficient by the described 2nd RRU service signal received based on described second to be corrected, be corrected from correction coefficient based on described second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, it is corrected based on described second correction coefficient by the described 2nd RRU service signal launched, is received by the described 2nd RRU service signal received and be corrected based on described second receipts self-correcting coefficient。

In conjunction with the 5th aspect, in the embodiment that the first is possible,

Described communication system also includes: the 3rd base station,

Wherein, described first base station is additionally operable to, and sends out channel emission the 3rd correction signal by described first business of a described RRU；Receive the 3rd base station described in channel reception by described first business of a described RRU and sent out the 4th correction signal of channel emission by the 3rd business of described 3rd RRU, according to by described first business receive channel reception to described 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to described 4th channel response, transmit described 4th penalty coefficient to the 3rd base station belonging to described 3rd RRU；

Described 3rd base station is used for, and performs the passage self-correcting of the 3rd RRU, receives self-correcting coefficient and the 3rd from correction coefficient obtaining the described 3rd the corresponding for RRU the 3rd；Receiving passage for reference with the 3rd business, the business of described 3rd RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described 3rd the corresponding for RRU the 3rd, wherein, described 3rd business is received one of them business that passage is described 3rd RRU and is received passage；Sending out passage for reference with the 3rd business, the business of described 3rd RRU is sent out passage and carries out passage relative correction to obtain described the 3rd corresponding for 3rd RRU correction coefficient, wherein, described 3rd business is sent out one of them business that passage is described 3rd RRU and is sent out passage；

Passage is received by the 3rd business of described 3rd RRU, receive described first base station and sent out the 3rd correction signal of channel emission by first business of a RRU, according to by described 3rd business receive channel reception to described 3rd correction signal estimate the 3rd channel response, and obtain the 3rd penalty coefficient according to described 3rd channel response；Sent out the 4th correction signal of channel emission by the 3rd business of described 3rd RRU, and receive described 4th penalty coefficient that described first base station sends；

Receive correction coefficient based on described 3rd penalty coefficient and described 4th penalty coefficient to the obtained the described 3rd to be updated, wherein, receive correction coefficient by the described 3rd RRU service signal received based on the update the described 3rd to be corrected, be corrected based on described 3rd correction coefficient by the 3rd RRU service signal launched；Or, based on described 3rd penalty coefficient and described 4th penalty coefficient, the 3rd correction coefficient obtained is updated, wherein, it is corrected based on described 3rd correction coefficient updated by the described 3rd RRU service signal launched, is received by the described 3rd RRU service signal received and be corrected based on described 3rd receipts correction coefficient。

In conjunction with the first possible embodiment of the 5th aspect or the 5th aspect, in the embodiment that the second is possible, described communication system also includes: the 4th base station,

Wherein, described first base station is additionally operable to, and sends out channel emission the 5th correction signal by the 4th business of a described RRU；Receive channel reception by the 4th business of a described RRU and sent out the 6th correction signal of channel emission by the 5th business of described 4th RRU, according to by described 4th business receive channel reception to described 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to described 6th channel response, transmit described 6th penalty coefficient to described 4th RRU own base station；Wherein, each business of a described RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a described RRU receiving passage corresponding based on each business is corrected；Each business of a described RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a described RRU and is corrected；

Described 4th base station is used for, and performs the passage self-correcting of the 4th RRU, receives self-correcting coefficient and the 4th from correction coefficient obtaining the described 4th the corresponding for RRU the 4th；Receiving passage for reference with the 5th business, the business of described 4th RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described 4th the corresponding for RRU the 4th, wherein, described 5th business is received one of them business that passage is described 4th RRU and is received passage；Sending out passage for reference with the 5th business, the business of described 4th RRU is sent out passage and carries out passage relative correction, to obtain described the 4th corresponding for 4th RRU correction coefficient, wherein, described 5th business is sent out one of them business that passage is described 4th RRU and is sent out passage；

Passage is received by the 5th business of described 4th RRU, receive described first base station and sent out the 5th correction signal of channel emission by the 4th business of a RRU, according to by described 5th business receive channel reception to described 5th correction signal estimate the 5th channel response, and obtain the 5th penalty coefficient according to described 5th channel response；Sent out the 6th correction signal of channel emission by the 5th business of described 4th RRU, and receive described 6th penalty coefficient that described first base station sends；

Receive correction coefficient based on described 5th penalty coefficient and described 6th penalty coefficient to the obtained the described 4th to be updated, wherein, receive correction coefficient by the described 4th RRU service signal received based on the update the described 4th to be corrected, be corrected based on described 4th correction coefficient by the 4th RRU service signal launched；Or, based on described 5th penalty coefficient and described 6th penalty coefficient, the 4th correction coefficient obtained is updated, wherein, it is corrected based on described 4th correction coefficient updated by the described 4th RRU service signal launched, is received by the described 4th RRU service signal received and be corrected based on described 4th receipts correction coefficient。

Sixth aspect present invention provides a kind of channel combined bearing calibration of long-distance radio frequency unit RRU, including:

Perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；

Receive reference value for reference with first, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first；

With first reference value for reference, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；

Channel emission the first correction signal is sent out by first business of a described RRU；

Passage is received by first business of a described RRU, receive by the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, according to by described first business receive channel reception to described second correction signal estimate second channel response, the second penalty coefficient is obtained according to second channel response, described second penalty coefficient is transmitted to described 2nd RRU own base station, wherein, described first business is received one of them business that passage is a described RRU and is received passage；Described first business is sent out one of them business that passage is a described RRU and is sent out passage。

In conjunction with the 6th aspect, in the embodiment that the first is possible,

The passage self-correcting of described execution the oneth RRU, receive self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first, including: perform the passage self-correcting of a RRU, each business to obtain a described RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a described RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, described k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

In conjunction with the first possible embodiment of the 6th aspect, in the embodiment that the second is possible,

Described receive reference value for reference with first, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)};$

Wherein, described inRepresent the first corresponding for subcarrier n receipts reference value, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

In conjunction with the embodiment that the first possible embodiment of the 6th aspect or the second of the 6th aspect are possible, in the embodiment that the third is possible,

Described with first reference value for reference, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)};$

Wherein, described inRepresent first reference value corresponding to subcarrier n, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

In conjunction with the third possible embodiment of the 6th aspect, in the 4th kind of possible embodiment,

First correction signal of the subcarrier n transmitting that described the first business by a described RRU sends out passage isWherein, S (n) is reference signal or training signal, and p2 is the numbering that the first business sends out passage, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage p2。

The embodiment possible in conjunction with the 6th aspect or the first possible embodiment of the 6th aspect or the second of the 6th aspect or the 4th kind of possible embodiment of the third possible embodiment of the 6th aspect or the 6th aspect, in the 5th kind of possible embodiment

Corresponding for subcarrier n first receives reference valueOr, corresponding for subcarrier n first receives reference valueWherein, described inRepresenting that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, described business receives passage p and the first business receipts passage is identical or different；

First corresponding for subcarrier n reference valueOr, first corresponding for subcarrier n reference valueWherein, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, described business send out passage p and the first business to send out passage identical or different；

Wherein, ${\mathrm{\θ}}_{k1}^{DL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{DL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{DL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{DL}\right(n\left)\right),$

Wherein, ${\mathrm{\θ}}_{k1}^{UL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{UL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{UL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{UL}\right(n\left)\right),$

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient, described N_ANTRepresent that the business of a described RRU is received passage or business and sent out the sum of passage,RepresentThe corresponding phase place in units of radian,RepresentThe phase place in units of radian。

In the embodiment possible in conjunction with the 6th aspect or the first possible embodiment of the 6th aspect or the second of the 6th aspect or the 5th kind of possible embodiment of the third possible embodiment of the 6th aspect or the 4th kind of possible embodiment of the 6th aspect or the 6th aspect, in the 6th kind of possible embodiment

Described method also includes:

Channel emission the 3rd correction signal is sent out by described first business of a described RRU；

Receive channel reception by described first business of a described RRU and sent out the 4th correction signal of channel emission by the 3rd business of described 3rd RRU, according to by described first business receive channel reception to described 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to described 4th channel response, transmit described 4th penalty coefficient to described 3rd RRU own base station。

In the embodiment possible in conjunction with the 6th aspect or the first possible embodiment of the 6th aspect or the second of the 6th aspect or the 5th kind of possible embodiment of the third possible embodiment of the 6th aspect or the 4th kind of possible embodiment of the 6th aspect or the 6th aspect or in the 6th kind of possible embodiment of the 6th aspect, in the 7th kind of possible embodiment

Described method also includes:

Channel emission the 5th correction signal is sent out by the 4th business of a described RRU；Receive channel reception by the 4th business of a described RRU and sent out the 6th correction signal of channel emission by the 5th business of described 4th RRU, according to by described 4th business receive channel reception to described 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to described 6th channel response, transmit described 6th penalty coefficient to described 4th RRU own base station；

The service signal of a described RRU receives and is corrected including based on described first receipts correction coefficient: each business of a described RRU is received the service signal of passage and received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a described RRU receiving passage corresponding based on each business is corrected；

The service signal of a described RRU is launched and is corrected including based on described first correction coefficient: each business of a described RRU is sent out the service signal of passage and launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a described RRU and is corrected。

Seventh aspect present invention provides a kind of channel combined correcting unit of long-distance radio frequency unit RRU, including:

Self-level unit, performs the passage self-correcting of a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；

First relative correction unit, for receiving reference value for reference with first, receives passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first the business of a described RRU；

Second relative correction unit, for with first reference value for reference, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；

First transmitter unit, for sending out channel emission the first correction signal by first business of a described RRU, described first business is sent out one of them business that passage is a described RRU and is sent out passage；

Receiving unit, for receiving passage by first business of a described RRU, receive by the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, wherein, described first business is received one of them business that passage is a described RRU and is received passage；

Estimation unit, for according to by described first business receive channel reception to described second correction signal estimate second channel response, according to second channel response obtain the second penalty coefficient；

Second transmitter unit, transmits described second penalty coefficient to described 2nd RRU own base station。

In conjunction with the 7th aspect, in the embodiment that the first is possible,

Described self-level unit specifically for, perform the passage self-correcting of a RRU, each business to obtain a described RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a described RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, described k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

In conjunction with the first possible embodiment of the 7th aspect, in the embodiment that the second is possible,

First relative correction unit, specifically in the following way, receives reference value for reference with first, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)};$

Wherein, described inRepresent the first corresponding for subcarrier n receipts reference value, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

The embodiment possible in conjunction with the second of the 7th aspect or the first possible embodiment of the 7th aspect, in the embodiment that the third is possible,

Described second relative correction unit, specifically in the following way, with first reference value for reference, sends out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient the business of a described RRU, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)};$

Wherein, described inRepresent first reference value corresponding to subcarrier n, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

The embodiment possible in conjunction with the second of the 7th aspect or the 7th aspect or the third possible embodiment of the first possible embodiment of the 7th aspect or the 7th aspect, in the 4th kind of possible embodiment,

Corresponding for subcarrier n first receives reference valueOr, corresponding for subcarrier n first receives reference valueWherein, described inRepresenting that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, described business receives passage p and the first business receipts passage is identical or different；

First corresponding for subcarrier n reference valueOr, first corresponding for subcarrier n reference valueWherein, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, described business send out passage p and the first business to send out passage identical or different；

Wherein, ${\mathrm{\θ}}_{k1}^{DL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=1}{\overset{{}_{N_{ANT}-1}}{\Σ}}{\mathrm{\θ}}_{k1,i}^{DL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{DL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{DL}\right(n\left)\right),$

Wherein, ${\mathrm{\θ}}_{k1}^{UL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{UL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{UL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{UL}\right(n\left)\right),$

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient, described N_ANTRepresent that a described RRU business receipts passage or business send out the sum of passage,RepresentThe corresponding phase place in units of radian,RepresentThe phase place in units of radian。

Eighth aspect present invention provides a kind of communication system, including:

First base station, for performing the passage self-correcting of a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；Receive reference value for reference with first, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first；With first reference value for reference, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；Channel emission the first correction signal is sent out by first business of a described RRU；Passage is received by first business of a described RRU, receive by the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, according to by described first business receive channel reception to described second correction signal estimate second channel response, the second penalty coefficient is obtained according to second channel response, described second penalty coefficient is transmitted to the second base station belonging to described 2nd RRU, wherein, described first business is received one of them business that passage is a described RRU and is received passage；Described first business is sent out one of them business that passage is a described RRU and is sent out passage；

Described second base station, for performing the passage self-correcting of the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second；By the correction of described 2nd RRU with reference to receiving passage, receive described first base station and sent out the first correction signal of channel emission by first business of a RRU, according to by the correction of described 2nd RRU with reference to receive channel reception to described first correction signal estimate the first channel response, and obtain the first penalty coefficient according to described first channel response；By the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, and receive described second penalty coefficient that described first base station sends；Receive self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, receive correction coefficient by the described 2nd RRU service signal received based on described second to be corrected, be corrected from correction coefficient based on described second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, it is corrected based on described second correction coefficient by the described 2nd RRU service signal launched, is received by the described 2nd RRU service signal received and be corrected based on described second receipts self-correcting coefficient。

Therefore, in the scheme that the embodiment of the present invention provides, the mutual correction signal of correction reference channel by the service channel of a RRU and the 2nd RRU, obtain for carrying out the penalty coefficient of channel compensation between RRU according to mutual correction signal, self-tuning RRU carries out service signal compensation in conjunction with penalty coefficient, is conducive to meeting the requirement of the spliced up-downgoing reciprocity of multiple RRU。This mechanism can realize being undertaken multiple RRU splicing to obtain more service channel RRU, so, is conducive to meeting higher communication requirement, can take into account cost and System Expansion demand。Such as existing two 2T2R are spliced into 1 4T4R, are so that existing investment is reasonably utilized。

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。

Fig. 1 is the schematic flow sheet of a kind of RRU channel correcting method that the embodiment of the present invention provides；

Fig. 2-a is the schematic diagram of a kind of base station that the embodiment of the present invention provides；

Fig. 2-b is the schematic diagram of the another kind of base station that the embodiment of the present invention provides；

Fig. 3 is the schematic flow sheet of the another kind of RRU channel correcting method that the embodiment of the present invention provides；

Fig. 4 is the schematic flow sheet of the another kind of RRU channel correcting method that the embodiment of the present invention provides；

Fig. 5 is the schematic diagram of a kind of RRU channel correcting device that the embodiment of the present invention provides；

Fig. 6 is the schematic diagram of the another kind of base station that the embodiment of the present invention provides；

Fig. 7 is the schematic diagram of the another kind of RRU channel correcting device that the embodiment of the present invention provides；

Fig. 8 is the schematic diagram of the another kind of base station that the embodiment of the present invention provides；

Fig. 9 is the schematic diagram of a kind of communication system that the embodiment of the present invention provides；

Figure 10 is the schematic diagram of the another kind of communication system that the embodiment of the present invention provides；

Figure 11 is the schematic diagram of the another kind of communication system that the embodiment of the present invention provides；

Figure 12 is the schematic diagram of the another kind of communication system that the embodiment of the present invention provides；

Figure 13 is the schematic flow sheet of the another kind of RRU channel correcting method that the embodiment of the present invention provides；

Figure 14 is the schematic diagram of the another kind of RRU channel correcting device that the embodiment of the present invention provides；

Figure 15 is the schematic diagram of the another kind of base station that the embodiment of the present invention provides；

Figure 16 is the schematic diagram of the another kind of communication system that the embodiment of the present invention provides；

Figure 17 is the schematic diagram of the another kind of communication system that the embodiment of the present invention provides；

Figure 18 is the schematic diagram of the another kind of communication system that the embodiment of the present invention provides；

Figure 19 is the schematic diagram of the another kind of communication system that the embodiment of the present invention provides。

Detailed description of the invention

The embodiment of the present invention provides RRU channel correcting method and relevant device and system, to taking into account cost and System Expansion demand。

In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a present invention part, rather than whole embodiments。Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, all should belong to the scope of protection of the invention。

It is described in detail individually below。

Term " first " in specification and claims of the present invention and above-mentioned accompanying drawing, " second ", " the 3rd " " the 4th " etc. (if existence) are for distinguishing similar object, without being used for describing specific order or precedence。Should be appreciated that the data of so use can be exchanged in the appropriate case, in order to embodiments of the invention described herein such as can with except here diagram or describe those except order implement。In addition, term " includes " and " having " and their any deformation, it is intended to cover non-exclusive comprising, such as, contain series of steps or the process of unit, method or system, product or equipment be not necessarily limited to those steps or the unit clearly listed, but can include clearly not listing or for intrinsic other step of these processes, method, product or equipment or unit。

One embodiment of RRU channel correcting method of the present invention。Wherein, a kind of RRU channel correcting method comprises the steps that the passage self-correcting performing the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the 2nd corresponding for RRU second；By the correction of the 2nd RRU with reference to receiving passage, receive the first correction signal being sent out channel emission by first business of a RRU, according to by the correction of the 2nd RRU with reference to receive channel reception to the first correction signal estimate the first channel response, and obtain the first penalty coefficient according to the first channel response；By the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, and receive the second penalty coefficient, wherein, second penalty coefficient obtains based on second channel response, second channel response be to by first business of a RRU receive channel reception to the second correction signal carry out channel estimating and obtain；Receive self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, receive correction coefficient by the 2nd RRU service signal received based on second to be corrected, be corrected from correction coefficient based on second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, it is corrected based on second correction coefficient by the 2nd RRU service signal launched, is received by the 2nd RRU service signal received and be corrected based on the second receipts self-correcting coefficient。

Referring to the schematic flow sheet that Fig. 1, Fig. 1 are a kind of RRU channel correcting methods that the embodiment of the present invention provides。Wherein, as it is shown in figure 1, a kind of RRU channel correcting method that the embodiment of the present invention provides can include herein below:

101, perform the passage self-correcting of the 2nd RRU, receive self-correcting coefficient and second from correction coefficient obtaining the 2nd corresponding for RRU second。

In some embodiments of the invention,

${\mathrm{\β}}_{k2,i}^{UL}\left(n\right)=\frac{1}{h_{k2}^{ct}\left(n\right)h_{k2,i}^r\left(n\right)};{\mathrm{\β}}_{k2,i}^{DL}\left(n\right)=\frac{1}{h_{k2}^{cr}\left(n\right)h_{k2,i}^t\left(n\right)}.$

Wherein, in above-mentioned formula, k2 represents the numbering of the 2nd RRU,Represent that the business of the 2nd RRU receives passage i channel response on subcarrier n,Represent that the correction of the 2nd RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of the 2nd RRU is with reference to sending out passage channel response on subcarrier n,Represent that the business of the 2nd RRU sends out passage i channel response on subcarrier n。Wherein,Represent that the business of the 2nd RRU receives second corresponding for the subcarrier n receipts self-correcting coefficient of passage i,Represent that the business of the 2nd RRU sends out corresponding for subcarrier n second of passage i from correction coefficient。

Wherein, after performing the self-correcting of the 2nd RRU, can obtaining the self-correcting coefficient of the 2nd RRU, self-correcting coefficient can include business and send out passage self-correcting coefficient (may be simply referred to as from correction coefficient) and business receipts passage self-correcting coefficient (may be simply referred to as receipts self-correcting coefficient)。Wherein, if utilizing receiving self-correcting coefficient and respectively the service signal of the 2nd RRU being received from correction coefficient and service signal is launched and compensated of the 2nd RRU, it is possible to meet the TDD system requirement to single RRU up-downgoing reciprocity。It is appreciated that situation is similar for performing other RRU self-tuning。

In some embodiments of the invention, after performing the self-correcting of the 2nd RRU, for instance can represent by formula below: $\frac{{\mathrm{\β}}_{k2,i}^{UL}\left(n\right)h_{k2,i}^r\left(n\right)}{{\mathrm{\β}}_{k2,i}^{DL}\left(n\right)h_{k2,i}^t\left(n\right)}=\frac{h_{k2}^{cr}\left(n\right)}{h_{k2}^{ct}\left(n\right)}.$

It is assumed that the numbering that the business receipts passage of the 2nd RRU and business send out passage proceeds by serial number from 0 respectively, then formula 3 can show following form:

$\frac{{\mathrm{\β}}_{k2,0}^{UL}\left(n\right)h_{k2,0}^r\left(n\right)}{{\mathrm{\β}}_{k2,0}^{DL}\left(n\right)h_{k2,0}^t\left(n\right)}=\frac{{\mathrm{\β}}_{k2,1}^{UL}\left(n\right)h_{k2,1}^r\left(n\right)}{{\mathrm{\β}}_{k2,1}^{DL}\left(n\right)h_{k2,1}^t\left(n\right)}=\mathrm{...}=\frac{{\mathrm{\β}}_{k2,N_{ANT}-1}^{UL}\left(n\right)h_{k2,N_{ANT}-1}^r\left(n\right)}{{\mathrm{\β}}_{k2,N_{ANT}-1}^{DL}\left(n\right)h_{k2,N_{ANT}-1}^t\left(n\right)}=\frac{h_{k2}^{cr}\left(n\right)}{h_{k2}^{ct}\left(n\right)}$

Wherein, N_ANTExpression business receives the sum of passage, wherein, numbers identical business receipts passage and business is sent out passage and can be shared the same antenna, wherein, for instanceRepresent that the business of the 2nd RRU receives the passage 0 channel response on subcarrier n,Represent that the business of the 2nd RRU sends out the passage 0 channel response on subcarrier n。Wherein,Represent that the business of the 2nd RRU receives second corresponding for the subcarrier n receipts self-correcting coefficient of passage 0,Represent that the business of the 2nd RRU sends out corresponding for subcarrier n second of passage 0 from correction coefficient, by that analogy。

Wherein, business is received total number of channels and is sent out total number of channels equal to N equal to business_ANT。

In some embodiments of the invention, the transmit-receive combination self-correcting factor beta of the 2nd RRU_k2,iN () is represented by the receipts self-correcting coefficient of the 2nd RRU and the ratio from correction coefficient, it may be assumed that

${\mathrm{\β}}_{k2,i}\left(n\right)=\frac{{\mathrm{\β}}_{k2,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k2,i}^{DL}\left(n\right)};$

If using transmit-receive combination self-correcting factor beta_k2,iN () represents, then can represent by formula below after performing the 2nd RRU self-correcting: ${\mathrm{\β}}_{k2,i}\left(n\right)\frac{h_{k2,i}^r\left(n\right)}{h_{k2,i}^t\left(n\right)}=\frac{h_{k2}^{cr}\left(n\right)}{h_{k2}^{ct}\left(n\right)};$

102, sent out the first correction signal of channel emission by first business of a RRU with reference to receipts channel reception by the correction of the 2nd RRU, the first correction signal according to receiving estimates the first channel response, and obtains the first penalty coefficient according to the first channel response。

In some embodiments of the invention, the structure of the 2nd RRU is RRU shown in Fig. 2-a such as, wherein the 2nd RRU comprises the steps that correction reference channel (wherein, correction reference channel includes correction with reference to receiving passage and correction with reference to sending out passage), multiple service channels are (wherein, service channel can include business and receive passage and business receipts passage), 2 signal coupling units, the signal of signal coupling unit port 0 can be sent to port 1 and/or port 2, simultaneously, the signal of port 1 and/or port 2 can be sent to port 0, signal coupling unit can comprise branch combiner, electrical switch, directional coupler, attenuator etc., and the first signal coupling unit structure can be different from the second coupling unit structure。Wherein, the structure of a RRU can as shown in Fig. 2-a or Fig. 2-b。

In some embodiments of the invention, it is assumed that by first business of a RRU send out passage (assuming that selection business sends out passage p, if business is sent out passage and is started serial number from 0, then p=0,1 ..N_ANT-1) the first correction signal that respective antenna is launched is s (n), the first correction signal then arrived with reference to the n-th subcarrier reception receiving antenna corresponding to passage (this antenna antenna that such as reusable service channel is corresponding, or the antenna for individually disposing) by the correction of the 2nd RRUCan be:

${\tilde{r}}_{k2,c}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p}^t\left(n\right)\·s\left(n\right).$

Wherein, h_comm,k2,k1N () represents that first service channel of a RRU receives the channel response of communication media between passage to the 2nd RRU correction reference, communication media at least includes wireless channel, radio-frequency cable, antenna etc., the first service channel such as a RRU passes through radio-frequency cable between the 2nd RRU correction reference channel, antenna, wireless channel communicates, h_comm,k2,k1N () is radio-frequency cable, antenna and the response of wireless channel composite channel。For TDD system, h_comm,k1,k2(n)=h_comm,k2,k1(n)。Represent that the correction of the 2nd RRU is with reference to the reception signal receiving passage。

Wherein, by the correction of the 2nd RRU with reference to, after receipts channel reception to the first correction signal, channel estimating being carried out as follows:

${\mathrm{\γ}}_{k2,c}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p}^t\left(n\right).$

Wherein, γ_k2,cN () represents that the correction of the 2nd RRU is with reference to the first corresponding for the subcarrier n channel response receiving passage。

Wherein, obtain the first penalty coefficient according to the first channel response to comprise the steps that

${\mathrm{\μ}}_{k2}\left(n\right)={\mathrm{\γ}}_{k2,q}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p}^t\left(n\right).$

Wherein, μ_k2N () represents first penalty coefficient of corresponding subcarrier n。

103, by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission。

104, the second penalty coefficient is received,

Wherein, the second penalty coefficient obtains based on second channel response, second channel response be to by first business of a RRU receive channel reception to the second correction signal carry out channel estimating and obtain。

Similar with the example above process, in some embodiments of the invention, assuming that the first correction signal of channel emission is sent out in the correction reference by the 2nd RRU is s (n), then receive passage (assuming that selection business receives passage p by first business of a RRU, if business receives passage starts serial number from 0, p=0,1 ..N_ANT-1) the second correction signal that the subcarrier n of respective antenna receivesCan be:

${\tilde{r}}_{k1,p}\left(n\right)=h_{k1,p}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right)\·s\left(n\right).$

Wherein, after receiving the second correction signal by the first business receipts passage p of a RRU, channel estimating can be carried out as follows:

${\mathrm{\γ}}_{k1,p}\left(n\right)=h_{k1,p}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, γ_k1,pN () represents that first business of a RRU receives the second channel response corresponding for subcarrier n of passage p。

Wherein, obtain the second penalty coefficient according to second channel response to comprise the steps that

${\mathrm{\μ}}_{k1}\left(n\right)={\mathrm{\γ}}_{k1,p}\left(n\right)=h_{k1,p}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, μ_k1N () represents second penalty coefficient of corresponding subcarrier n。

105, self-correcting coefficient is received based on the first penalty coefficient, the second penalty coefficient and second, obtain the second receipts correction coefficient, wherein, receive correction coefficient by the 2nd RRU service signal received based on second to be corrected, be corrected from correction coefficient based on second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, it is corrected based on second correction coefficient by the 2nd RRU service signal launched, is received by the 2nd RRU service signal received and be corrected based on the second receipts self-correcting coefficient。

In some embodiments of the invention, receive self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, comprise the steps that the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, receive self-correcting coefficient by second and be multiplied by first-phase to penalty coefficient to obtain the second receipts correction coefficient。

In other embodiments of the present invention, receive self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, comprise the steps that described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, receive described second self-correcting coefficient divided by described second-phase to penalty coefficient to obtain the second receipts correction coefficient。

In some embodiments of the invention, second correction coefficient is obtained from correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, comprise the steps that the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, by second from correction coefficient divided by first-phase to penalty coefficient to obtain second correction coefficient

In other embodiments of the present invention, second correction coefficient is obtained from correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, comprise the steps that the first penalty coefficient divided by the second penalty coefficient to obtain second-phase to penalty coefficient, be multiplied by second-phase to penalty coefficient to obtain second correction coefficient by second from correction coefficient。

Wherein, first-phase to the penalty coefficient that penalty coefficient is between a RRU and the 2nd RRU,

Wherein, penalty coefficient is by first-phase: $\mathrm{\μ}\left(n\right)=\frac{{\mathrm{\μ}}_{k1}\left(n\right)}{{\mathrm{\μ}}_{k2}\left(n\right)}.$

Wherein, penalty coefficient is by second-phase: $\widetilde{\mathrm{\μ}}\left(n\right)=\frac{1}{\mathrm{\μ}\left(n\right)}=\frac{{\mathrm{\μ}}_{k2}\left(n\right)}{{\mathrm{\μ}}_{k1}\left(n\right)}.$

It is appreciated that, the step executive agent of the present embodiment such scheme can be the 2nd RRU, the 2nd corresponding for RRU BBU, or other device (such as main control unit) that the 2nd in RRU own base station, certainly, for the step that each device in the 2nd RRU own base station (can claim the second base station) performs, all can be described as the step that the 2nd RRU own base station performs。It is appreciated that the 2nd RRU and the one RRU is likely to share a BBU, or does not share a BBU。

Therefore, respectively through the mutual correction signal of correction reference channel of the service channel of a RRU and the 2nd RRU in the present embodiment, obtain for carrying out the penalty coefficient of channel compensation between RRU according to mutual correction signal, self-tuning RRU carries out service signal compensation in conjunction with penalty coefficient, is conducive to meeting the requirement of the spliced up-downgoing reciprocity of multiple RRU。This mechanism can realize being undertaken multiple RRU splicing to obtain more service channel RRU, so, is conducive to meeting higher communication requirement, can take into account cost and System Expansion demand。Such as existing two 2T2R are spliced into 1 4T4R, are so that existing investment is reasonably utilized。

Another embodiment of RRU channel correcting method of the present invention。Wherein, another kind of RRU channel correcting method comprises the steps that the passage self-correcting performing a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first；Receiving passage for reference with the first business, the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient, wherein, the first business is received one of them business that passage is a RRU and is received passage；Sending out passage for reference with the first business, the business of a RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, wherein, the first business is sent out one of them business that passage is a RRU and is sent out passage；Wherein the service signal of a RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；Channel emission the first correction signal is sent out by first business of a RRU；Passage is received by first business of a RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by first business receive channel reception to the second correction signal estimate second channel response, and obtain the second penalty coefficient according to second channel response, transmit the second penalty coefficient to the 2nd RRU own base station。

Referring to the schematic flow sheet that Fig. 3, Fig. 3 are a kind of RRU channel correcting methods that the embodiment of the present invention provides。Wherein, as it is shown on figure 3, a kind of RRU channel correcting method that the embodiment of the present invention provides can include herein below:

301, perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first。

In some embodiments of the invention,

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, in above-mentioned formula, above-mentioned k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n。Wherein, above-mentionedRepresent that the business of an above-mentioned RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

Wherein, after performing the self-correcting of a RRU, can obtaining the self-correcting coefficient of a RRU, self-correcting coefficient can include business and send out passage self-correcting coefficient (may be simply referred to as from correction coefficient) and business receipts passage self-correcting coefficient (may be simply referred to as receipts self-correcting coefficient)。Wherein, if utilizing receiving self-correcting coefficient and respectively the service signal of a RRU being received from correction coefficient and service signal is launched and compensated of a RRU, it is possible to meet the TDD system requirement to single RRU up-downgoing reciprocity。It is appreciated that situation is similar for performing other RRU self-tuning。

In some embodiments of the invention, after performing the self-correcting of a RRU, for instance can represent by formula below: $\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)h_{k1,i}^r\left(n\right)}{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)h_{k1,i}^t\left(n\right)}=\frac{h_{k1}^{cr}\left(n\right)}{h_{k1}^{ct}\left(n\right)}.$

It is assumed that the numbering that the business receipts passage of the 2nd RRU and business send out passage proceeds by serial number from 0 respectively, then formula 8 can show following form:

$\frac{{\mathrm{\β}}_{k1,0}^{UL}\left(n\right)h_{k1,0}^r\left(n\right)}{{\mathrm{\β}}_{k1,0}^{DL}\left(n\right)h_{k1,0}^t\left(n\right)}=\frac{{\mathrm{\β}}_{k1,1}^{UL}\left(n\right)h_{k1,1}^r\left(n\right)}{{\mathrm{\β}}_{k1,1}^{DL}\left(n\right)h_{k1,1}^t\left(n\right)}=\mathrm{...}=\frac{{\mathrm{\β}}_{k1,N_{ANT}-1}^{UL}\left(n\right)h_{k1,N_{ANT}-1}^r\left(n\right)}{{\mathrm{\β}}_{k1,N_{ANT}-1}^{DL}\left(n\right)h_{k1,N_{ANT}-1}^t\left(n\right)}=\frac{h_{k1}^{cr}\left(n\right)}{h_{k1}^{ct}\left(n\right)}.$

Wherein, N_ANTExpression business receives the sum of passage, wherein, numbers identical business receipts passage and business is sent out passage and can be shared the same antenna, wherein, for instanceRepresent that the business of a RRU receives the passage 0 channel response on subcarrier n,Represent that the business of a RRU sends out the passage 0 channel response on subcarrier n。Wherein,Represent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage 0,Represent that the business of a RRU sends out corresponding for subcarrier n first of passage 0 from correction coefficient, by that analogy。

In some embodiments of the invention, the transmit-receive combination self-correcting factor beta of a RRU_k1,iN () is represented by the receipts self-correcting coefficient of a RRU and the ratio from correction coefficient:

${\mathrm{\β}}_{k1,i}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)};$

If using transmit-receive combination self-correcting factor beta_k1,iN () represents, then can represent by formula below after performing the 2nd RRU self-correcting:

${\mathrm{\β}}_{k1,i}\left(n\right)\frac{h_{k1,i}^r\left(n\right)}{h_{k1,i}^t\left(n\right)}=\frac{h_{k1}^{cr}\left(n\right)}{h_{k1}^{ct}\left(n\right)};$

302, receiving passage for reference with the first business, the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient, wherein, the first business is received one of them business that passage is a RRU and is received passage。

In some embodiments of the invention, receive passage for reference with the first business, the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}=\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)};$

Wherein, p represents the numbering in the first business collection of letters road, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

Wherein, ${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)}=\frac{h_{k1,p}^r\left(n\right)}{h_{k1,i}^r\left(n\right)}.$

It is appreciated thatEqual to 1。

303, sending out passage for reference with the first business, the business of a RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, wherein, the first business is sent out one of them business that passage is a RRU and is sent out passage；Wherein, the service signal of a RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；Channel emission the first correction signal is sent out by first business of a RRU。

In some embodiments of the invention, send out passage for reference with the first business, the business of a RRU sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, it may include:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, above-mentioned p represents that the first business sends out the numbering of passage, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

Wherein, ${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)}=\frac{h_{k1,p}^t\left(n\right)}{h_{k1,i}^t\left(n\right)}.$

It is appreciated thatEqual to 1。

304, passage is received by first business of a RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by first business receive channel reception to the second correction signal estimate second channel response, and obtain the second penalty coefficient according to second channel response, transmit the second penalty coefficient to the 2nd RRU own base station。

In some embodiments of the invention, it is assumed that the first correction signal being sent out channel emission by the correction reference of the 2nd RRU is s (n), then receive passage (assuming that selection business receives passage p by first business of a RRU, if business receives passage starts serial number from 0, p=0,1 ..N_ANT-1) the second correction signal that the subcarrier n of respective antenna receivesCan be:

${\tilde{r}}_{k1,p}\left(n\right)=h_{k1,p}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right)\·s\left(n\right).$

Wherein, after receiving the second correction signal by the first business receipts passage p of a RRU, channel estimating can be carried out as follows:

${\mathrm{\γ}}_{k1,p}\left(n\right)=h_{k1,p}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, γ_k1,pN () represents that first business of a RRU receives the second channel response corresponding for subcarrier n of passage p。

Wherein, obtain the second penalty coefficient according to second channel response to comprise the steps that

${\mathrm{\μ}}_{k1}\left(n\right)={\mathrm{\γ}}_{k1,p}\left(n\right)=h_{k1,p}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, μ_k1N () represents second penalty coefficient of corresponding subcarrier n。

It is appreciated that between step 302～step 304 not have the priority execution sequence of certainty, can synchronize to perform or can asynchronous execution or intersect perform。

In some embodiments of the invention, if also introducing the 3rd RRU to carry out joint channel correction, then said method may also include that and sends out channel emission the 3rd correction signal by first business of a RRU；

Receive channel reception by first business of a RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, according to by first business receive channel reception to the 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to the 4th channel response, transmit the 4th penalty coefficient to the 3rd RRU own base station。

In some embodiments of the invention, the self-correction of the 3rd RRU own base station can be similar with the behavior of a RRU own base station with relative correction mode, and between RRU, compensation behavior can be similar with the behavior of the 2nd RRU own base station。

3rd RRU own base station concrete operations can be as follows:

Perform the passage self-correcting of the 3rd RRU, receive self-correcting coefficient and the 3rd from correction coefficient obtaining the 3rd the corresponding for RRU the 3rd；Receiving passage for reference with the 3rd business, the business receipts passage of the 3rd RRU is carried out passage relative correction to obtain the 3rd the 3rd corresponding for RRU receipts correction coefficient, wherein, the 3rd business is received one of them business that passage is the 3rd RRU and is received passage；Sending out passage for reference with the 3rd business, the business of the 3rd RRU is sent out passage and carries out passage relative correction to obtain corresponding for the 3rd RRU the 3rd correction coefficient, wherein, the 3rd business is sent out one of them business that passage is the 3rd RRU and is sent out passage；Passage is received by the 3rd business of the 3rd RRU, receive the first base station and sent out the 3rd correction signal of channel emission by first business of a RRU, according to by the 3rd business receive channel reception to the 3rd correction signal estimate the 3rd channel response, and obtain the 3rd penalty coefficient according to the 3rd channel response；Sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, and receive the 4th penalty coefficient that the first base station sends；Based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 3rd RRU service signal received based on the update the 3rd to be corrected, be corrected based on the 3rd correction coefficient by the 3rd RRU service signal launched；Or, based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd correction coefficient obtained is updated, wherein, it is corrected based on the 3rd correction coefficient updated by the 3rd RRU service signal launched, is received by the 3rd RRU service signal received and be corrected based on the 3rd receipts correction coefficient。

In some embodiments of the invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, receive correction coefficient by the obtained the 3rd and be multiplied by third phase penalty coefficient the 3rd is received correction coefficient with what obtain updating。

In other embodiments of the present invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, receive correction coefficient by the obtained the 3rd divided by the 4th relative penalty coefficient to obtain the 3rd receipts correction coefficient updated。

In some embodiments of the invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, by the obtained the 3rd correction coefficient divided by third phase to penalty coefficient with obtain update the 3rd correction coefficient

In other embodiments of the present invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, the obtained the 3rd correction coefficient is multiplied by the 4th relative penalty coefficient to obtain the 3rd correction coefficient updated。

In some embodiments of the invention, if also introducing the 4th RRU to carry out joint channel correction, then said method may also include that

Channel emission the 5th correction signal is sent out by the 4th business of a RRU；

Receive channel reception by the 4th business of a RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, according to by the 4th business receive channel reception to the 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to the 6th channel response, transmit the 6th penalty coefficient to the 4th RRU own base station。

Wherein, the service signal of a RRU receives and is corrected including based on the first receipts correction coefficient:

Each business of the oneth RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a RRU receiving passage corresponding based on each business is corrected。

Wherein, the service signal transmitting of a RRU is corrected including based on first correction coefficient:

Each business of the oneth RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a RRU and is corrected。

In some embodiments of the invention, the behavior of the 4th RRU own base station is similar with the behavior of the 3rd RRU own base station。4th RRU own base station concrete operations can be as follows:

Perform the passage self-correcting of the 4th RRU, receive self-correcting coefficient and the 4th from correction coefficient obtaining the 4th the corresponding for RRU the 4th；Receiving passage for reference with the 5th business, the business receipts passage of the 4th RRU is carried out passage relative correction to obtain the 4th the 4th corresponding for RRU receipts correction coefficient, wherein, the 5th business is received one of them business that passage is the 4th RRU and is received passage；Sending out passage for reference with the 5th business, the business of the 4th RRU is sent out passage and carries out passage relative correction, to obtain corresponding for the 4th RRU the 4th correction coefficient, wherein, the 5th business is sent out one of them business that passage is the 4th RRU and is sent out passage；Passage is received by the 5th business of the 4th RRU, receive the first base station and sent out the 5th correction signal of channel emission by the 4th business of a RRU, according to by the 5th business receive channel reception to the 5th correction signal estimate the 5th channel response, and obtain the 5th penalty coefficient according to the 5th channel response；Sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, and receive the 6th penalty coefficient that the first base station sends；Based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 4th RRU service signal received based on the update the 4th to be corrected, be corrected based on the 4th correction coefficient by the 4th RRU service signal launched；Or, based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th correction coefficient obtained is updated, wherein, it is corrected based on the 4th correction coefficient updated by the 4th RRU service signal launched, is received by the 4th RRU service signal received and be corrected based on the 4th receipts correction coefficient。

It is appreciated that by introducing the 3rd RRU and the four RRU, building of complicated cell base station system can be advantageously implemented, and then be conducive to promoting power system capacity。

It is appreciated that, the step executive agent of the present embodiment such scheme can be a RRU, corresponding for a RRU BBU, or other device (such as main control unit) that the oneth in RRU own base station, certainly, for the step that each device in a RRU own base station (can claim the first base station) performs, all can be described as the step that a RRU own base station performs。It is appreciated that the 2nd RRU and the one RRU is likely to share a BBU, or does not share a BBU。Certainly, the 3rd RRU and the four RRU also can share BBU, and even a RRU, the 2nd RRU, the 3rd RRU and the four RRU also can share BBU, can be deployed in same position or diverse location。Oneth RRU, the 2nd RRU, the 3rd RRU and the four RRU also corresponding identical or different community RRU。

Therefore, respectively through the mutual correction signal of correction reference channel of the service channel of a RRU and the 2nd RRU in the present embodiment, obtain for carrying out the penalty coefficient of channel compensation between RRU according to mutual correction signal, self-tuning RRU carries out service signal compensation in conjunction with penalty coefficient, is conducive to meeting the requirement of the spliced up-downgoing reciprocity of multiple RRU。This mechanism can realize being undertaken multiple RRU splicing to obtain more service channel RRU, so, is conducive to meeting higher communication requirement, can take into account cost and System Expansion demand。Such as existing two 2T2R are spliced into 1 4T4R, are so that existing investment is reasonably utilized。

For ease of being better understood from and implement the such scheme of the embodiment of the present invention, below by illustrating the first base station and the second base station carries out RRU joint channel trimming process and illustrates。

Assume that a RRU belongs to the first base station, 2nd RRU belongs to the second base station, wherein, if a RRU and the two RRU shared baseband processing unit BBU, then the first base station is regarded as same base station or base station together with being deployed in the second base station, certainly, the first base station and the second base station may also be the different base station being deployed in diverse geographic location。

In some embodiments of the invention, the structure of the 2nd RRU is RRU shown in Fig. 2-a such as, the structure of the second base station is such as shown in Fig. 2-a, wherein the 2nd RRU comprises the steps that correction reference channel (wherein, correction reference channel includes correction with reference to receiving passage and correction with reference to sending out passage), multiple service channels are (wherein, service channel can include business and receive passage and business receipts passage), 2 signal coupling units, the signal of signal coupling unit port 0 can be sent to port 1 and/or port 2, simultaneously, the signal of port 1 and/or port 2 can be sent to port 0, signal coupling unit can comprise branch combiner, electrical switch, directional coupler, attenuator etc., and the first signal coupling unit structure can be different from the second coupling unit structure。Wherein, the structure of a RRU can as shown in Fig. 2-a or Fig. 2-b。

Referring to the schematic flow sheet that Fig. 4, Fig. 4 are a kind of RRU channel correcting methods that the embodiment of the present invention provides。Wherein, as shown in Figure 4, a kind of RRU channel correcting method that the embodiment of the present invention provides can include herein below:

401, the first base station performs the passage self-correcting of a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first；Second base station performs the passage self-correcting of the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the 2nd corresponding for RRU second。

That assumes a RRU is numbered k1, and the 2nd RRU is numbered k2。

In some embodiments of the invention,

${\mathrm{\β}}_{k,i}^{UL}\left(n\right)=\frac{1}{h_k^{ct}\left(n\right)h_{k,i}^r\left(n\right)};$

${\mathrm{\β}}_{k,i}^{DL}\left(n\right)=\frac{1}{h_k^{cr}\left(n\right)h_{k,i}^t\left(n\right)}.$

Wherein, in above-mentioned formula, k represents the numbering (if k is equal to k1, identifying a RRU, if k represents the 2nd RRU equal to k2) of RRU,Represent that the business of RRUk receives passage i channel response on subcarrier n,Represent that the correction of RRUk is with reference to receiving passage channel response on subcarrier n,Represent that the correction of RRUk is with reference to sending out passage channel response on subcarrier n,Represent that the business of RRUk sends out passage i channel response on subcarrier n。Wherein,Represent that the business of RRUk receives second corresponding for the subcarrier n receipts self-correcting coefficient of passage i,Represent that the business of RRUk sends out corresponding for subcarrier n second of passage i from correction coefficient。

Wherein, after performing the self-correcting of RRU and the two RRU, can respectively obtaining the self-correcting coefficient of RRU and the two RRU, self-correcting coefficient can include business and send out passage self-correcting coefficient (may be simply referred to as from correction coefficient) and business receipts passage self-correcting coefficient (may be simply referred to as receipts self-correcting coefficient)。Wherein, if utilizing receiving self-correcting coefficient and respectively the service signal of RRU and the two RRU being received from correction coefficient and service signal is launched and compensated of RRU and the two RRU, it is possible to meet the TDD system requirement to single RRU up-downgoing reciprocity。

In some embodiments of the invention, after performing the self-correcting of RRU (RRU and the two RRU), for instance can represent by formula below:

$\frac{{\mathrm{\β}}_{k,i}^{UL}\left(n\right)h_{k,i}^r\left(n\right)}{{\mathrm{\β}}_{k,i}^{DL}\left(n\right)h_{k,i}^t\left(n\right)}=\frac{h_k^{cr}\left(n\right)}{h_k^{ct}\left(n\right)}.$

Wherein, number identical business receipts passage and business is sent out passage and can be shared the same antenna。

In some embodiments of the invention, the transmit-receive combination self-correcting factor beta of RRU (RRU and the two RRU)_k,iN () is represented by the receipts self-correcting coefficient of this RRU and the ratio from correction coefficient:

${\mathrm{\β}}_{k,i}\left(n\right)=\frac{{\mathrm{\β}}_{k,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k,i}^{DL}\left(n\right)}.$

If using transmit-receive combination self-correcting factor beta_k,iN () represents, then can represent by formula below after performing RRU self-correcting:

${\mathrm{\β}}_{k,i}\left(n\right)\frac{h_{k,i}^r\left(n\right)}{h_{k,i}^t\left(n\right)}=\frac{h_k^{cr}\left(n\right)}{h_k^{ct}\left(n\right)}.$

402, passage is received for reference with the first business in the first base station, and the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient, and wherein, the first business is received one of them business that passage is a RRU and received passage。

In some embodiments of the invention, passage is received for reference with the first business in the first base station, the business of a RRU is received passage and carries out passage relative correction and receive correction coefficient and comprise the steps that obtaining the oneth corresponding for RRU first

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}=\left(n\right)};$

Wherein, p represents the numbering in the first business collection of letters road, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

Wherein, ${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)}=\frac{h_{k1,p}^r\left(n\right)}{h_{k1,i}^r\left(n\right)}.$

It is appreciated thatEqual to 1。

403, passage is sent out for reference with the first business in the first base station, the business of a RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient。

Wherein, the first business is sent out one of them business that passage is a RRU and is sent out passage；Wherein, the service signal of a RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；Channel emission the first correction signal is sent out by first business of a RRU。

In some embodiments of the invention, passage is sent out for reference with the first business in the first base station, the business of a RRU is sent out passage and carries out passage relative correction and can comprise the steps that to obtain corresponding for RRU first correction coefficient

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, above-mentioned p represents that the first business sends out the numbering of passage, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

Wherein, ${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)}=\frac{h_{k1,p}^t\left(n\right)}{h_{k1,i}^t\left(n\right)}.$

It is appreciated thatEqual to 1。

404, channel emission the first correction signal is sent out by first business of a RRU in the first base station；

405, the first correction signal of channel emission is sent out in the second base station by the correction of the 2nd RRU with reference to receipts channel reception the first base station by first business of a RRU, the first correction signal according to receiving estimates the first channel response, and obtains the first penalty coefficient according to the first channel response。

In some embodiments of the invention, it is assumed that the first base station by first business of a RRU send out passage (assuming that selection business sends out passage p, if business is sent out passage and is started serial number from 0, then p=0,1 ..N_ANT-1) the first correction signal that respective antenna is launched is s (n), the first correction signal that then the second base station is arrived with reference to the n-th subcarrier reception receiving antenna corresponding to passage (this antenna antenna that such as reusable service channel is corresponding, or the antenna for individually disposing) by the correction of the 2nd RRUCan be:

${\tilde{r}}_{k2,c}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p}^t\left(n\right)\·s\left(n\right).$

Wherein, h_comm,k2,k1N () represents that first service channel of a RRU receives the channel response of communication media between passage to the 2nd RRU correction reference, communication media at least includes wireless channel, radio-frequency cable, antenna etc., the first service channel such as a RRU passes through radio-frequency cable between the 2nd RRU correction reference channel, antenna, wireless channel communicates, h_comm,k2,k1N () is radio-frequency cable, antenna and the response of wireless channel composite channel。For TDD system, h_comm,k1,k2(n)=h_comm,k2,k1(n)。Represent that the correction of the 2nd RRU is with reference to the reception signal receiving passage。

Wherein, by the correction of the 2nd RRU with reference to, after receipts channel reception to the first correction signal, channel estimating being carried out as follows:

${\mathrm{\γ}}_{k2,c}\left(n\right)=k_{k2}^{cr}\left(n\right)\·k_{comm,k2,k1}\left(n\right)\·k_{k1,p}^t\left(n\right).$

Wherein, γ_k2,cN () represents that the correction of the 2nd RRU is with reference to the first corresponding for the subcarrier n channel response receiving passage。

Wherein, obtain the first penalty coefficient according to the first channel response to comprise the steps that

${\mathrm{\μ}}_{k2}\left(n\right)={\mathrm{\γ}}_{k2,q}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p}^t\left(n\right).$

Wherein, μ_k2N () represents first penalty coefficient of corresponding subcarrier n。

406, channel emission second correction signal is sent out by the correction reference of the 2nd RRU in the second base station；

407, channel reception the second base station is received by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission by first business of a RRU in the first base station, second channel response is estimated according to the second correction signal received, and obtain the second penalty coefficient according to second channel response, transmit the second penalty coefficient to the second base station。

In some embodiments of the invention, assume, the first correction signal that channel emission is sent out by the correction reference of the 2nd RRU in second base station is s (n), then passage is received (assuming that selection business receives passage p by first business of a RRU in the first base station, if business receives passage starts serial number from 0, p=0,1 ..N_ANT-1) the second correction signal that the subcarrier n of respective antenna receivesCan be:

${\tilde{r}}_{k1,p}\left(n\right)=h_{k1,p}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right)\·s\left(n\right).$

Wherein, after receiving the second correction signal by the first business receipts passage p of a RRU, channel estimating can be carried out as follows:

${\mathrm{\γ}}_{k1,p}\left(n\right)=h_{k1,p}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, γ_k1,pN () represents that first business of a RRU receives the second channel response corresponding for subcarrier n of passage p。

Wherein, obtain the second penalty coefficient according to second channel response to comprise the steps that

${\mathrm{\μ}}_{k1}\left(n\right)={\mathrm{\γ}}_{k1,p}\left(n\right)=h_{k1,p}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, μ_k1N () represents second penalty coefficient of corresponding subcarrier n。

408, the second base station is received self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, receive correction coefficient by the 2nd RRU service signal received based on second to be corrected, be corrected from correction coefficient based on second by the 2nd RRU service signal launched；Or, second base station obtains second correction coefficient based on the first penalty coefficient, the second penalty coefficient and second from correction coefficient, wherein, it is corrected based on second correction coefficient by the 2nd RRU service signal launched, is received by the 2nd RRU service signal received and be corrected based on the second receipts self-correcting coefficient。

In some embodiments of the invention, second base station is received self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, comprise the steps that the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, receive self-correcting coefficient by second and be multiplied by first-phase to penalty coefficient to obtain the second receipts correction coefficient。

In other embodiments of the present invention, second base station is received self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, comprise the steps that described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, receive described second self-correcting coefficient divided by described second-phase to penalty coefficient to obtain the second receipts correction coefficient。

In some embodiments of the invention, second base station obtains second correction coefficient based on the first penalty coefficient, the second penalty coefficient and second from correction coefficient, comprise the steps that the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, by second from correction coefficient divided by first-phase to penalty coefficient to obtain second correction coefficient

In other embodiments of the present invention, second base station obtains second correction coefficient based on the first penalty coefficient, the second penalty coefficient and second from correction coefficient, comprise the steps that the first penalty coefficient divided by the second penalty coefficient to obtain second-phase to penalty coefficient, be multiplied by second-phase to penalty coefficient to obtain second correction coefficient by second from correction coefficient。

Being appreciated that between some step above-mentioned does not have the execution sequencing of certainty。Such as there is no the execution sequencing of certainty between step 402～405 and step 406～407, it is possible to synchronize execution or asynchronous execution or the execution that intersects。Step 402, step 403, step 404～and there is no inevitable execution sequencing between 405 and step 406～407, it is possible to synchronize execution or asynchronous execution or the execution that intersects。

It is appreciated that the first base station can be operated according to the mode of operation of embodiment illustrated in fig. 3。And the second base station can be operated according to the mode of operation of embodiment illustrated in fig. 1, particularly relevant operation can also refer to the description of above-described embodiment。

Therefore, the mutual correction signal of correction reference channel of service channel respectively through a RRU of the present embodiment the first base station and the second base station and the 2nd RRU, obtain for carrying out the penalty coefficient of channel compensation between RRU according to mutual correction signal, self-tuning RRU carries out service signal compensation in conjunction with penalty coefficient, is conducive to meeting the requirement of the spliced up-downgoing reciprocity of multiple RRU。This mechanism can realize the RRU that multiple RRU carry out splice to obtain more service channel, so, is conducive to meeting higher communication requirement, can take into account cost and System Expansion demand。Such as existing two 2T2R are spliced into 1 4T4R, are so that existing investment is reasonably utilized。

At present, multipoint cooperative (CoMP, CoordinativeMultiplePoint) as the key characteristic of Long Term Evolution plan (LTE, LongTermEvolution), CoMP technology is utilized can be effective against the interference problem of LTE cell edge。Combine transmission (JT, the JointTransmission) technology one as CoMP technology, it is possible to significantly improve cell edge and average throughput。In order to obtain the gain that JT technology is brought in a tdd system, need also exist for carrying out channel correcting。Research finds, with single cells beam figuration technology the difference is that, JT technology needs the ratio of the up-downgoing radio-frequency channel that each antenna of multiple communities is corresponding identical。Even if each community has carried out channel correcting respectively, if not done by the correction of minizone, JT technology still can not arrive expected performance。Based on the channel combined correction mechanism that the embodiment of the present invention provides, advantageously allow JT technology and reach higher performance。Based on embodiment of the present invention scheme, complete channel combined correction between the RRU that the multiple communities launched that cooperate are corresponding, thus higher array gain and spatial multiplexing gain can be obtained。

Referring to Fig. 5, the embodiment of the present invention provides a kind of RRU channel correcting device 500, it may include:

Self-level unit 510, first receives unit 520, estimation unit 530, transmitter unit the 540, second reception unit 550 and correction unit 560。

Wherein, self-level unit 510, for performing the passage self-correcting of the 2nd RRU, receive self-correcting coefficient and second from correction coefficient obtaining the 2nd corresponding for RRU second；

First receives unit 520, for receiving passage by the correction reference of the 2nd RRU, receives the first correction signal being sent out channel emission by first business of a RRU；

Estimation unit 530, for according to by the correction of the 2nd RRU with reference to receive channel reception to the first correction signal estimate the first channel response, and obtain the first penalty coefficient according to the first channel response；

Transmitter unit 540, for sending out the second correction signal of channel emission by the correction reference of the 2nd RRU；

Second receives unit 550, is used for receiving the second penalty coefficient, and wherein, the second penalty coefficient obtains based on second channel response, second channel response be to by first business of a RRU receive channel reception to the second correction signal carry out channel estimating and obtain；

Correction unit 560, for receiving self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, receive correction coefficient by the 2nd RRU service signal received based on second to be corrected, be corrected from correction coefficient based on second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, it is corrected based on second correction coefficient by the 2nd RRU service signal launched, is received by the 2nd RRU service signal received and be corrected based on the second receipts self-correcting coefficient。

In some embodiments of the invention, self-level unit 510 can be specifically for, perform the passage self-correcting of the 2nd RRU, each business to obtain the 2nd RRU send out each subcarrier of passage corresponding second from correction coefficient, and obtain the 2nd RRU each business receive passage each subcarrier corresponding second receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k2,i}^{UL}\left(n\right)=\frac{1}{h_{k2}^{ct}\left(n\right)h_{k2,i}^r\left(n\right)};{\mathrm{\β}}_{k2,i}^{DL}\left(n\right)=\frac{1}{h_{k2}^{cr}\left(n\right)h_{k2,i}^t\left(n\right)};$

Wherein, above-mentioned k2 represents the numbering of the 2nd RRU, above-mentionedRepresent that the business of the 2nd RRU receives passage i channel response on subcarrier n, above-mentionedRepresent that the above-mentioned correction of the 2nd RRU is with reference to receiving passage channel response on subcarrier n, above-mentionedRepresent that the above-mentioned correction of the 2nd RRU is with reference to sending out passage channel response on subcarrier n, above-mentionedRepresent that the business of the 2nd RRU sends out passage i channel response on subcarrier n；

Wherein, above-mentionedRepresent that the business of the 2nd RRU receives second corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of the 2nd RRU sends out corresponding for subcarrier n second of passage i from correction coefficient。

In some embodiments of the invention, correction unit 560 can be specifically for,

Receive self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, including: by the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, receive self-correcting coefficient by second and be multiplied by first-phase to penalty coefficient to obtain the second receipts correction coefficient；Or, by the first penalty coefficient divided by the second penalty coefficient to obtain second-phase to penalty coefficient, by second receive self-correcting coefficient divided by second-phase to penalty coefficient to obtain the second receipts correction coefficient；

In other embodiments of the present invention, correction unit 560 can be specifically for,

Second correction coefficient is obtained from correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, including: by the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, by second from correction coefficient divided by first-phase to penalty coefficient to obtain second correction coefficient；Or, by the first penalty coefficient divided by the second penalty coefficient to obtain second-phase to penalty coefficient, it is multiplied by second-phase to penalty coefficient to obtain second correction coefficient by second from correction coefficient。

It is understood that the function of each functional module of the RRU channel correcting device 500 of the present embodiment can implement according to the method in said method embodiment, it implements process and is referred to the associated description of said method embodiment, repeats no more herein。Wherein, RRU channel correcting device 500 can be such as other device in BBU, controller or the 2nd RRU itself or the 2nd RRU own base station。

Referring to Fig. 6, the embodiment of the present invention provides a kind of base station 600, it may include:

As shown in Figure 6, the base station 600 of the present embodiment include at least one bus 601, at least one processor 602 of being connected with bus 601 and at least one memorizer 603 being connected with bus 601。

Wherein, processor 602 by bus 601, call in memorizer 603 code of storage for, perform the passage self-correcting of the 2nd RRU, receive self-correcting coefficient and second from correction coefficient obtaining the 2nd corresponding for RRU second；

By the correction of the 2nd RRU with reference to receiving passage, receive the first correction signal being sent out channel emission by first business of a RRU, according to by the correction of the 2nd RRU with reference to receive channel reception to the first correction signal estimate the first channel response, and obtain the first penalty coefficient according to the first channel response；

By the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, and receive the second penalty coefficient, wherein, second penalty coefficient obtains based on second channel response, second channel response be to by first business of a RRU receive channel reception to the second correction signal carry out channel estimating and obtain；

Receive self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, receive correction coefficient by the 2nd RRU service signal received based on second to be corrected, be corrected from correction coefficient based on second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, it is corrected based on second correction coefficient by the 2nd RRU service signal launched, is received by the 2nd RRU service signal received and be corrected based on the second receipts self-correcting coefficient。

In some embodiments of the invention, processor 602 performs the passage self-correcting of the 2nd RRU, receive self-correcting coefficient and second from correction coefficient obtaining the 2nd corresponding for RRU second, including: perform the passage self-correcting of the 2nd RRU, each business to obtain the 2nd RRU send out each subcarrier of passage corresponding second from correction coefficient, and obtain the 2nd RRU each business receive passage each subcarrier corresponding second receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k2,i}^{UL}\left(n\right)=\frac{1}{h_{k2}^{ct}\left(n\right)h_{k2,i}^r\left(n\right)};{\mathrm{\β}}_{k2,i}^{DL}\left(n\right)=\frac{1}{h_{k2}^{cr}\left(n\right)h_{k2,i}^t\left(n\right)};$

Wherein, above-mentioned k2 represents the numbering of the 2nd RRU, above-mentionedRepresent that the business of the 2nd RRU receives passage i channel response on subcarrier n, above-mentionedRepresent that the above-mentioned correction of the 2nd RRU is with reference to receiving passage channel response on subcarrier n, above-mentionedRepresent that the above-mentioned correction of the 2nd RRU is with reference to sending out passage channel response on subcarrier n, above-mentionedRepresent that the business of the 2nd RRU sends out passage i channel response on subcarrier n；

Wherein, above-mentionedRepresent that the business of the 2nd RRU receives second corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of the 2nd RRU sends out corresponding for subcarrier n second of passage i from correction coefficient。

In some embodiments of the invention, processor 602 is received self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, including: by the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, receive self-correcting coefficient by second and be multiplied by first-phase to penalty coefficient to obtain the second receipts correction coefficient；Or, by the first penalty coefficient divided by the second penalty coefficient to obtain second-phase to penalty coefficient, by second receive self-correcting coefficient divided by second-phase to penalty coefficient to obtain the second receipts correction coefficient。

In other embodiments of the present invention, processor 602 obtains second correction coefficient based on the first penalty coefficient, the second penalty coefficient and second from correction coefficient, including: by the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, by second from correction coefficient divided by first-phase to penalty coefficient to obtain second correction coefficient；Or, by the first penalty coefficient divided by the second penalty coefficient to obtain second-phase to penalty coefficient, it is multiplied by second-phase to penalty coefficient to obtain second correction coefficient by second from correction coefficient。

It is understood that the function of each functional module of the base station 600 of the present embodiment can implement according to the method in said method embodiment, it implements process and is referred to the associated description of said method embodiment, repeats no more herein。

Such as the working method of base station 600 can the second base station in above-described embodiment。

Referring to Fig. 7, the embodiment of the present invention provides a kind of RRU channel correcting device 700, it may include:

Self-level unit the 710, first relative correction unit the 720, second relative correction unit the 730, first transmitter unit 740, reception unit 750, estimation unit 760 and the second transmitter unit 770。

Wherein, self-level unit 710, for performing the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first；

First relative correction unit 720, for receiving passage for reference with the first business, the business receipts passage of the oneth RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient, and wherein, the first business is received one of them business that passage is a RRU and is received passage；

Second relative correction unit 730, passage is sent out for reference with the first business, the business of the oneth RRU being sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, wherein, the first business is sent out one of them business that passage is a RRU and is sent out passage；Wherein, the service signal of a RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；

First transmitter unit 740, for sending out channel emission the first correction signal by first business of a RRU；

Receive unit 750, for receiving passage by first business of a RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission,

Estimation unit 760, for according to above-mentioned reception unit by first business receive channel reception to the second correction signal estimate second channel response, and according to second channel respond obtain the second penalty coefficient；

Second transmitter unit 770, for transmitting the second penalty coefficient to the 2nd RRU own base station。

In some embodiments of the invention, self-level unit 710 can be specifically for, perform the passage self-correcting of a RRU, each business to obtain a RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, above-mentioned k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

In some embodiments of the invention, the business receipts passage of the oneth RRU specifically in the following way, receiving passage for reference with the first business, can be carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient by the first relative correction unit 710, wherein

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}=\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}=\left(n\right)};$

Wherein, above-mentioned p represents the numbering in the first business collection of letters road, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

In some embodiments of the invention, the second relative correction unit 730 can be specifically for, in the following way, passage is sent out for reference with the first business, the business of the oneth RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, wherein

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, above-mentioned p represents that the first business sends out the numbering of passage, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

In some embodiments of the invention, the first transmitter unit 740 can be additionally used in, and sends out channel emission the 3rd correction signal by first business of a RRU；

Receive unit 750 can be additionally used in, receive channel reception by first business of a RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU,

Estimation unit 760 can be additionally used in, according to by the first business receive channel reception to the 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to the 4th channel response；

Second transmitter unit 770 is additionally operable to, and transmits, to the 3rd RRU own base station, the 4th penalty coefficient that estimation unit 760 obtains。

In some embodiments of the invention, the first transmitter unit 740 is additionally operable to, and sends out channel emission the 5th correction signal by the 4th business of a RRU；

Receive unit 750 to be additionally operable to, receive channel reception by the 4th business of a RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU,

Estimation unit 760 is additionally operable to, according to by the 4th business receive channel reception to the 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to the 6th channel response；

Second transmitter unit 770 is additionally operable to, and transmits the 6th penalty coefficient to the 4th RRU own base station；

Wherein, each business of a RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a RRU receiving passage corresponding based on each business is corrected；Each business of the oneth RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a RRU and is corrected。

It is understood that the function of each functional module of the RRU channel correcting device 700 of the present embodiment can implement according to the method in said method embodiment, it implements process and is referred to the associated description of said method embodiment, repeats no more herein。Wherein, RRU channel correcting device 500 can be such as other device in BBU, controller or a RRU itself or a RRU own base station。

Referring to Fig. 8, the embodiment of the present invention provides a kind of base station 800, it may include:

As shown in Figure 8, the base station 800 of the present embodiment include at least one bus 801, at least one processor 802 of being connected with bus 801 and at least one memorizer 803 being connected with bus 801。

Wherein, processor 802 by bus 801, call in memorizer 803 code of storage for,

Perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first；

Receiving passage for reference with the first business, the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient, wherein, the first business is received one of them business that passage is a RRU and is received passage；

Sending out passage for reference with the first business, the business of a RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, wherein, the first business is sent out one of them business that passage is a RRU and is sent out passage；Wherein, the service signal of a RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；

Channel emission the first correction signal is sent out by first business of a RRU；

Passage is received by first business of a RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by first business receive channel reception to the second correction signal estimate second channel response, and obtain the second penalty coefficient according to second channel response, transmit the second penalty coefficient to the 2nd RRU own base station。

In some embodiments of the invention, processor 602 performs the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first, including: perform the passage self-correcting of a RRU, each business to obtain a RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,ir}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, above-mentioned k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

In some embodiments of the invention, processor 602 receives passage for reference with the first business, and the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}=\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}=\left(n\right)};$

Wherein, above-mentioned p represents the numbering in the first business collection of letters road, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

In some embodiments of the invention, processor 602 sends out passage for reference with the first business, the business of a RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, above-mentioned p represents that the first business sends out the numbering of passage, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

In other embodiments of the present invention, processor 602 sends out channel emission the 3rd correction signal also by first business of a RRU；Receive channel reception by first business of a RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, according to by first business receive channel reception to the 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to the 4th channel response, transmit the 4th penalty coefficient to the 3rd RRU own base station。

In other embodiments of the present invention, processor 602 sends out channel emission the 5th correction signal also by the 4th business of a RRU；Receive channel reception by the 4th business of a RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, according to by the 4th business receive channel reception to the 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to the 6th channel response, transmit the 6th penalty coefficient to the 4th RRU own base station。

Wherein, the service signal of the oneth RRU receives and is corrected including based on the first receipts correction coefficient: each business of a RRU is received the service signal of passage and received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a RRU receiving passage corresponding based on each business is corrected。

Wherein, the service signal of the oneth RRU is launched and is corrected including based on first correction coefficient: each business of a RRU is sent out the service signal of passage and launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a RRU and is corrected。

It is understood that the function of each functional module of the base station 800 of the present embodiment can implement according to the method in said method embodiment, it implements process and is referred to the associated description of said method embodiment, repeats no more herein。Such as the working method of base station 800 can the first base station in above-described embodiment。

Referring to Fig. 9, the embodiment of the present invention also provides for a kind of communication system, it may include:

First base station 910 and the second base station 920。

Wherein, the first base station 910, for performing the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first；Receiving passage for reference with the first business, the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient, wherein, the first business is received one of them business that passage is a RRU and is received passage；Sending out passage for reference with the first business, the business of a RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, wherein, the first business is sent out one of them business that passage is a RRU and is sent out passage；Wherein, the service signal of a RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；Channel emission the first correction signal is sent out by first business of a RRU；Passage is received by first business of a RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by first business receive channel reception to the second correction signal estimate second channel response, and obtain the second penalty coefficient according to second channel response, transmit the second penalty coefficient to the second base station 920 belonging to the 2nd RRU。

Second base station 920, for performing the passage self-correcting of the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the 2nd corresponding for RRU second；By the correction of the 2nd RRU with reference to receiving passage, receive the first correction signal being sent out channel emission by first business of a RRU, according to by the correction of the 2nd RRU with reference to receive channel reception to the first correction signal estimate the first channel response, and obtain the first penalty coefficient according to the first channel response；By the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, and receive the second penalty coefficient；Receive self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein receive correction coefficient by the 2nd RRU service signal received based on second to be corrected, be corrected from correction coefficient based on second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, it is corrected based on second correction coefficient by the 2nd RRU service signal launched, is received by the 2nd RRU service signal received and be corrected based on the second receipts self-correcting coefficient。

Referring to Figure 10, in some embodiments of the invention, communication system also includes: the 3rd base station 930。

Wherein, the first base station 910 is additionally operable to, and sends out channel emission the 3rd correction signal by first business of a RRU；Receive channel reception by first business of a RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, according to by first business receive channel reception to the 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to the 4th channel response, transmit the 4th penalty coefficient to the 3rd RRU own base station。

In some embodiments of the invention, the 3rd base station 930 can be used for, and performs the passage self-correcting of the 3rd RRU, receives self-correcting coefficient and the 3rd from correction coefficient obtaining the 3rd the corresponding for RRU the 3rd；Receiving passage for reference with the 3rd business, the business receipts passage of the 3rd RRU is carried out passage relative correction to obtain the 3rd the 3rd corresponding for RRU receipts correction coefficient, wherein, the 3rd business is received one of them business that passage is the 3rd RRU and is received passage；Sending out passage for reference with the 3rd business, the business of the 3rd RRU is sent out passage and carries out passage relative correction to obtain corresponding for the 3rd RRU the 3rd correction coefficient, wherein, the 3rd business is sent out one of them business that passage is the 3rd RRU and is sent out passage；Passage is received by the 3rd business of the 3rd RRU, receive the first base station and sent out the 3rd correction signal of channel emission by first business of a RRU, according to by the 3rd business receive channel reception to the 3rd correction signal estimate the 3rd channel response, and obtain the 3rd penalty coefficient according to the 3rd channel response；Sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, and receive the 4th penalty coefficient that the first base station sends；Based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 3rd RRU service signal received based on the update the 3rd to be corrected, be corrected based on the 3rd correction coefficient by the 3rd RRU service signal launched；Or, based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd correction coefficient obtained is updated, wherein, it is corrected based on the 3rd correction coefficient updated by the 3rd RRU service signal launched, is received by the 3rd RRU service signal received and be corrected based on the 3rd receipts correction coefficient。

In some embodiments of the invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, receive correction coefficient by the obtained the 3rd and be multiplied by third phase penalty coefficient the 3rd is received correction coefficient with what obtain updating。

In other embodiments of the present invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, receive correction coefficient by the obtained the 3rd divided by the 4th relative penalty coefficient to obtain the 3rd receipts correction coefficient updated。

In some embodiments of the invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, by the obtained the 3rd correction coefficient divided by third phase to penalty coefficient with obtain update the 3rd correction coefficient

In other embodiments of the present invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, the obtained the 3rd correction coefficient is multiplied by the 4th relative penalty coefficient to obtain the 3rd correction coefficient updated。

Referring to Figure 11 or Figure 12, in some embodiments of the invention, communication system also includes: the 4th base station 940。

Wherein, the first base station can be additionally used in, and sends out channel emission the 5th correction signal by the 4th business of a RRU；Receive channel reception by the 4th business of a RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, according to by the 4th business receive channel reception to the 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to the 6th channel response, transmit the 6th penalty coefficient to the 4th RRU own base station。Wherein, each business of the oneth RRU is received the service signal of passage and is received, the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a RRU receiving passage corresponding based on each business is corrected, each business of the oneth RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a RRU and is corrected。

In some embodiments of the invention, the 4th base station 940 can be used for, and performs the passage self-correcting of the 4th RRU, receives self-correcting coefficient and the 4th from correction coefficient obtaining the 4th the corresponding for RRU the 4th；Receiving passage for reference with the 5th business, the business receipts passage of the 4th RRU is carried out passage relative correction to obtain the 4th the 4th corresponding for RRU receipts correction coefficient, wherein, the 5th business is received one of them business that passage is the 4th RRU and is received passage；Sending out passage for reference with the 5th business, the business of the 4th RRU is sent out passage and carries out passage relative correction, to obtain corresponding for the 4th RRU the 4th correction coefficient, wherein, the 5th business is sent out one of them business that passage is the 4th RRU and is sent out passage；Passage is received by the 5th business of the 4th RRU, receive the first base station and sent out the 5th correction signal of channel emission by the 4th business of a RRU, according to by the 5th business receive channel reception to the 5th correction signal estimate the 5th channel response, and obtain the 5th penalty coefficient according to the 5th channel response；Sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, and receive the 6th penalty coefficient that the first base station sends；Based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 4th RRU service signal received based on the update the 4th to be corrected, be corrected based on the 4th correction coefficient by the 4th RRU service signal launched；Or, based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th correction coefficient obtained is updated, wherein, it is corrected based on the 4th correction coefficient updated by the 4th RRU service signal launched, is received by the 4th RRU service signal received and be corrected based on the 4th receipts correction coefficient。

It is appreciated that by introducing the 3rd base station and the 4th base station, building of complicated cell base station system can be advantageously implemented, and then be conducive to promoting power system capacity。

The first base station that the working method of the first base station 910 being appreciated that in the present embodiment can be similar in said method embodiment, the working method of the second base station 920 can be similar to the second base station in said method embodiment。Wherein, the first base station 940, base station the 930, the 4th, the 910, second base station the 920, the 3rd, base station is likely to a shared BBU, or is deployed in same position。

Being the schematic flow sheet that the embodiment of the present invention also provides for the another kind of channel combined bearing calibration of RRU referring to Figure 13, Figure 13, the another kind of channel combined bearing calibration of RRU comprises the steps that

1301, perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first；

In some embodiments of the invention, perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first, comprise the steps that the passage self-correcting performing a RRU, each business to obtain a RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, above-mentioned k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

1302, receive reference value for reference with first, the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient；

In some embodiments of the invention, receive reference value for reference with first, the business of a RRU is sent out passage and carries out passage relative correction and comprise the steps that to obtain corresponding for RRU first correction coefficient

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)};$

Wherein, above-mentionedRepresent the first corresponding for subcarrier n receipts reference value, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

Wherein, the first receipts reference value that different sub carrier is corresponding can be identical or different。

In some embodiments of the invention,

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}=\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}=\left(n\right)};$

Wherein, p represents the numbering in the second business collection of letters road, above-mentionedRepresent that the business of a RRU is received corresponding for subcarrier n the first of passage p and received self-correcting coefficient, can be byReference value is received as corresponding for subcarrier n first, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

Wherein, ${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)}.$

It is appreciated that nowEqual to 1。

1303, with first reference value for reference, the business of the oneth RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, wherein, the service signal of the oneth RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；

In some embodiments of the invention, above-mentioned receive reference value for reference with first, the business of a RRU sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, it is possible to including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)};$

Wherein, above-mentionedRepresent first reference value corresponding to subcarrier n, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

Wherein, first reference value that different sub carrier is corresponding can be identical or different。

In some embodiments of the invention,

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, above-mentioned p represents that the second business sends out the numbering of passage, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, can be byAs first corresponding for subcarrier n reference value, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

Wherein, ${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)}.$

It is appreciated that under this application scenariosEqual to 1。

In other embodiments of the present invention, the first receipts reference value also can be other any nonzero value, for instance corresponding for subcarrier n first receives reference valueFirst reference value also can be other any nonzero value, for instance first corresponding for subcarrier n reference value ${\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)=e^{-j\·{\mathrm{\θ}}_{k1}^{DL}\left(n\right)};$

Wherein, ${\mathrm{\θ}}_{k1}^{DL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{DL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{DL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{DL}\right(n\left)\right),$

Wherein, ${\mathrm{\θ}}_{k1}^{UL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{UL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{UL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{UL}\right(n\left)\right),$

Wherein, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

Wherein,Represent the phase place of each passage correspondence subcarrier n,Represent each the phase place receiving passage correspondence subcarrier n, wherein,WithUnit be radian。

Wherein, N_ANTRepresent and send out passage or receive total number of channels, if above-mentioned formula is to send out passage with business and business is sent out passage and started serial number to N from 0_ANT-1 is example, is not the scene of serial number, can also this analogize。

In other embodiments of the present invention, ${\mathrm{\β}}_{k1,\mathrm{ref}}^{\mathrm{DL}}\left(n\right)=1,{\mathrm{\β}}_{k1,\mathrm{ref}}^{\mathrm{UL}}\left(n\right)=1.$

1304, sending out channel emission the first correction signal by first business of a RRU, wherein, the first business is sent out one of them business that passage is a RRU and is sent out passage, and the first business sends out passage and the second business is sent out passage and can be sent out passage for identical or different business。

Wherein, by first business of a RRU send out channel emission the first correction signal be probably s (n) orSuch as, whenDuring equal to 1, the first correction signal is s (n), whenBeing not equal to the first correction signal when 1 can beWherein, whenIt is not equal to 1 and first correction signal when being s (n), willBeing sent to the base station receiving s (n), reception signal is multiplied by by base station again that receive s (n)

1305, passage is received by first business of a RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by first business receive channel reception to the second correction signal estimate second channel response, the second penalty coefficient is obtained according to second channel response, the second penalty coefficient is transmitted to the 2nd RRU own base station, wherein, the first business is received one of them business that passage is a RRU and is received passage。

In some embodiments of the invention, it is assumed that by first business of a RRU send out passage (assuming that it is that business sends out passage p2 that the first business sends out passage, wherein, if business is sent out passage and is started serial number from 0, then p2=0,1 ..N_ANT-1) the first correction signal that respective antenna is launched isThe first correction signal then arrived with reference to the n-th subcarrier reception receiving antenna corresponding to passage (this antenna antenna that such as reusable service channel is corresponding, or the antenna for individually disposing) by the correction of the 2nd RRUCan be:

${\tilde{r}}_{k2,c}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right)\·\tilde{s}\left(n\right).$

Wherein, by the correction of the 2nd RRU with reference to, after receipts channel reception to the first correction signal, channel estimating being carried out as follows:

${\mathrm{\γ}}_{k2,c}\left(n\right)=\frac{{\tilde{r}}_{k2,c}\left(n\right)}{s\left(n\right)}=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right)\·{\widetilde{\mathrm{\β}}}_{k1,p2}^{DL}\left(n\right).$

Wherein, γ_k2,cN () represents that the correction of the 2nd RRU is with reference to the first corresponding for the subcarrier n channel response receiving passage。

Wherein, obtain the first penalty coefficient according to the first channel response to comprise the steps that

${\mathrm{\μ}}_{k2}\left(n\right)={\mathrm{\γ}}_{k2,q}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right)\·{\widetilde{\mathrm{\β}}}_{k1,p2}^{DL}\left(n\right).$

Optionally, first business of a RRU send out passage (assuming that selection business sends out passage p2, if business is sent out passage and is started serial number from 0, then p2=0,1 ..N_ANT-1) the first correction signal that respective antenna is launched is s (n), the first correction signal then arrived with reference to the n-th subcarrier reception receiving antenna corresponding to passage (this antenna antenna that such as reusable service channel is corresponding, or the antenna for individually disposing) by the correction of the 2nd RRUCan be:

${\tilde{r}}_{k2,c}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right)\·s\left(n\right).$

Wherein, by the correction of the 2nd RRU with reference to, after receipts channel reception to the first correction signal, channel estimating being carried out as follows:

${\mathrm{\γ}}_{k2,c}\left(n\right)=\frac{{\tilde{r}}_{k2,c}\left(n\right)}{s\left(n\right)}=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right).$

Wherein, γ_k2,cN () represents that the correction of the 2nd RRU is with reference to the first corresponding for the subcarrier n channel response receiving passage。

Further, the base station handle belonging to a RRUIt is sent to the 2nd RRU own base station。

Wherein, obtain the first penalty coefficient according to the first channel response to comprise the steps that

${\mathrm{\μ}}_{k2}\left(n\right)={\mathrm{\γ}}_{k2,q}\left(n\right)\·{\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p}^t\left(n\right)\·{\widetilde{\mathrm{\β}}}_{k1,p2}^{DL}\left(n\right).$

Wherein, μ_k2N () represents first penalty coefficient of corresponding subcarrier n。

Similar with the example above process, in some embodiments of the invention, assuming that the second correction signal of channel emission is sent out in the correction reference by the 2nd RRU is s (n), then receive passage (assuming that selection business receives passage p2 by first business of a RRU, wherein, if business is received passage and started serial number, then p2=0 from 0,1 ..N_ANT-1) the second correction signal that the subcarrier n of respective antenna receivesCan be:

${\tilde{r}}_{k1,p2}\left(n\right)={\widetilde{\mathrm{\β}}}_{k1,p2}^{UL}\left(n\right)\·h_{k1,p2}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right)\·s\left(n\right).$

Wherein, after receiving the second correction signal by the first business receipts passage p2 of a RRU, channel estimating can be carried out as follows:

${\mathrm{\γ}}_{k1,p2}\left(n\right)=\frac{{\tilde{r}}_{k1,p2}\left(n\right)}{s\left(n\right)}={\widetilde{\mathrm{\β}}}_{k1,p2}^{UL}\left(n\right)\·h_{k1,p2}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, γ_k1,pN () represents that first business of a RRU receives the second channel response corresponding for subcarrier n of passage p2。

Wherein, obtain the second penalty coefficient according to second channel response to comprise the steps that

${\mathrm{\μ}}_{k1}\left(n\right)={\mathrm{\γ}}_{k1,p2}\left(n\right)={\widetilde{\mathrm{\β}}}_{k1,p2}^{UL}\left(n\right)\·h_{k1,p2}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, μ_k1N () represents second penalty coefficient of corresponding subcarrier n。The oneth above-mentioned base station of RRU is μ_k1N () is sent to the 2nd RRU own base station。

In some embodiments of the invention, 2nd RRU own base station can be received self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, receive correction coefficient by the 2nd RRU service signal received based on second to be corrected, be corrected from correction coefficient based on second by the 2nd RRU service signal launched；Or, second base station obtains second correction coefficient based on the first penalty coefficient, the second penalty coefficient and second from correction coefficient, wherein, it is corrected based on second correction coefficient by the 2nd RRU service signal launched, is received by the 2nd RRU service signal received and be corrected based on the second receipts self-correcting coefficient。

In some embodiments of the invention, 2nd RRU own base station is received self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, comprise the steps that the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, receive self-correcting coefficient by second and be multiplied by first-phase to penalty coefficient to obtain the second receipts correction coefficient。

In other embodiments of the present invention, 2nd RRU own base station is received self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, comprise the steps that the first penalty coefficient divided by the second penalty coefficient to obtain second-phase to penalty coefficient, receive second self-correcting coefficient divided by second-phase to penalty coefficient to obtain the second receipts correction coefficient。

In some embodiments of the invention, 2nd RRU own base station obtains second correction coefficient based on the first penalty coefficient, the second penalty coefficient and second from correction coefficient, comprise the steps that the second penalty coefficient divided by the first penalty coefficient to obtain first-phase to penalty coefficient, by second from correction coefficient divided by first-phase to penalty coefficient to obtain second correction coefficient

In other embodiments of the present invention, 2nd RRU own base station obtains second correction coefficient based on the first penalty coefficient, the second penalty coefficient and second from correction coefficient, comprise the steps that the first penalty coefficient divided by the second penalty coefficient to obtain second-phase to penalty coefficient, be multiplied by second-phase to penalty coefficient to obtain second correction coefficient by second from correction coefficient。

In some embodiments of the invention, if also introducing the 3rd RRU to carry out joint channel correction, then said method may also include that and sends out channel emission the 3rd correction signal by first business of a RRU；

Receive channel reception by first business of a RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, according to by first business receive channel reception to the 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to the 4th channel response, transmit the 4th penalty coefficient to the 3rd RRU own base station。

In some embodiments of the invention, the self-correction of the 3rd RRU own base station can be similar with the behavior of a RRU own base station with relative correction mode, and between RRU, compensation behavior can be similar with the behavior of the 2nd RRU own base station。

3rd RRU own base station concrete operations can be as follows:

Perform the passage self-correcting of the 3rd RRU, receive self-correcting coefficient and the 3rd from correction coefficient obtaining the 3rd the corresponding for RRU the 3rd；Receiving passage for reference with the 3rd business, the business receipts passage of the 3rd RRU is carried out passage relative correction to obtain the 3rd the 3rd corresponding for RRU receipts correction coefficient, wherein, the 3rd business is received one of them business that passage is the 3rd RRU and is received passage；Sending out passage for reference with the 3rd business, the business of the 3rd RRU is sent out passage and carries out passage relative correction to obtain corresponding for the 3rd RRU the 3rd correction coefficient, wherein, the 3rd business is sent out one of them business that passage is the 3rd RRU and is sent out passage；Passage is received by the 3rd business of the 3rd RRU, receive the first base station and sent out the 3rd correction signal of channel emission by first business of a RRU, according to by the 3rd business receive channel reception to the 3rd correction signal estimate the 3rd channel response, and obtain the 3rd penalty coefficient according to the 3rd channel response；Sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, and receive the 4th penalty coefficient that the first base station sends；Based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 3rd RRU service signal received based on the update the 3rd to be corrected, be corrected based on the 3rd correction coefficient by the 3rd RRU service signal launched；Or, based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd correction coefficient obtained is updated, wherein, it is corrected based on the 3rd correction coefficient updated by the 3rd RRU service signal launched, is received by the 3rd RRU service signal received and be corrected based on the 3rd receipts correction coefficient。

In some embodiments of the invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, receive correction coefficient by the obtained the 3rd and be multiplied by third phase penalty coefficient the 3rd is received correction coefficient with what obtain updating。

In other embodiments of the present invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, receive correction coefficient by the obtained the 3rd divided by the 4th relative penalty coefficient to obtain the 3rd receipts correction coefficient updated。

In some embodiments of the invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, by the obtained the 3rd correction coefficient divided by third phase to penalty coefficient with obtain update the 3rd correction coefficient

In other embodiments of the present invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, the obtained the 3rd correction coefficient is multiplied by the 4th relative penalty coefficient to obtain the 3rd correction coefficient updated。

In some embodiments of the invention, if also introducing the 4th RRU to carry out joint channel correction, then said method may also include that

Channel emission the 5th correction signal is sent out by the 4th business of a RRU；

Receive channel reception by the 4th business of a RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, according to by the 4th business receive channel reception to the 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to the 6th channel response, transmit the 6th penalty coefficient to the 4th RRU own base station。

Wherein, the service signal of a RRU receives and is corrected including based on the first receipts correction coefficient:

Each business of the oneth RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a RRU receiving passage corresponding based on each business is corrected。

Wherein, the service signal transmitting of a RRU is corrected including based on first correction coefficient:

Each business of the oneth RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a RRU and is corrected。

In some embodiments of the invention, the behavior of the 4th RRU own base station is similar with the behavior of the 3rd RRU own base station。4th RRU own base station concrete operations can be as follows:

Perform the passage self-correcting of the 4th RRU, receive self-correcting coefficient and the 4th from correction coefficient obtaining the 4th the corresponding for RRU the 4th；Receiving passage for reference with the 5th business, the business receipts passage of the 4th RRU is carried out passage relative correction to obtain the 4th the 4th corresponding for RRU receipts correction coefficient, wherein, the 5th business is received one of them business that passage is the 4th RRU and is received passage；Sending out passage for reference with the 5th business, the business of the 4th RRU is sent out passage and carries out passage relative correction, to obtain corresponding for the 4th RRU the 4th correction coefficient, wherein, the 5th business is sent out one of them business that passage is the 4th RRU and is sent out passage；Passage is received by the 5th business of the 4th RRU, receive the first base station and sent out the 5th correction signal of channel emission by the 4th business of a RRU, according to by the 5th business receive channel reception to the 5th correction signal estimate the 5th channel response, and obtain the 5th penalty coefficient according to the 5th channel response；Sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, and receive the 6th penalty coefficient that the first base station sends；Based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 4th RRU service signal received based on the update the 4th to be corrected, be corrected based on the 4th correction coefficient by the 4th RRU service signal launched；Or, based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th correction coefficient obtained is updated, wherein, it is corrected based on the 4th correction coefficient updated by the 4th RRU service signal launched, is received by the 4th RRU service signal received and be corrected based on the 4th receipts correction coefficient。

It is appreciated that by introducing the 3rd RRU and the four RRU, building of complicated cell base station system can be advantageously implemented, and then be conducive to promoting power system capacity。

It is appreciated that, the step executive agent of the present embodiment such scheme can be a RRU, corresponding for a RRU BBU, or other device (such as main control unit) that the oneth in RRU own base station, certainly, for the step that each device in a RRU own base station (can claim the first base station) performs, all can be described as the step that a RRU own base station performs。It is appreciated that the 2nd RRU and the one RRU is likely to share a BBU, or does not share a BBU。Certainly, the 3rd RRU and the four RRU also can share BBU, and even a RRU, the 2nd RRU, the 3rd RRU and the four RRU also can share BBU, can be deployed in same position or diverse location。Oneth RRU, the 2nd RRU, the 3rd RRU and the four RRU also corresponding identical or different community RRU。

Therefore, respectively through the mutual correction signal of correction reference channel of the service channel of a RRU and the 2nd RRU in the present embodiment, obtain for carrying out the penalty coefficient of channel compensation between RRU according to mutual correction signal, self-tuning RRU carries out service signal compensation in conjunction with penalty coefficient, is conducive to meeting the requirement of the spliced up-downgoing reciprocity of multiple RRU。This mechanism can realize being undertaken multiple RRU splicing to obtain more service channel RRU, so, is conducive to meeting higher communication requirement, can take into account cost and System Expansion demand。Such as existing two 2T2R are spliced into 1 4T4R, are so that existing investment is reasonably utilized。

Referring to Figure 14, the embodiment of the present invention provides a kind of RRU channel correcting device 1400, it may include:

Self-level unit the 1410, first relative correction unit the 1420, second relative correction unit the 1430, first transmitter unit 1440, reception unit 1450, estimation unit 1460 and the second transmitter unit 1470。

Wherein, self-level unit 1410, perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first；

First relative correction unit 1420, for receiving reference value for reference with first, carries out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient to the business receipts passage of a RRU；

Second relative correction unit 1430, for with first reference value for reference, the business of the oneth RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, the service signal of the oneth RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；

First transmitter unit 1440, for sending out channel emission the first correction signal by first business of a RRU, the first business is sent out one of them business that passage is a RRU and is sent out passage；

Receiving unit 1450, for receiving passage by first business of a RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, wherein, the first business is received one of them business that passage is a RRU and is received passage；

Estimation unit 1460, for according to by first business receive channel reception to the second correction signal estimate second channel response, according to second channel response obtain the second penalty coefficient；

Second transmitter unit 1470, transmits the second penalty coefficient to the 2nd RRU own base station。

In some embodiments of the invention, self-level unit 1410 can be specifically for, perform the passage self-correcting of a RRU, each business to obtain a RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, above-mentioned k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

In some embodiments of the invention, first relative correction unit 1420 can specifically in the following way, receive reference value for reference with first, the business of a RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)};$

Wherein, above-mentionedRepresent the first corresponding for subcarrier n receipts reference value, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

In some embodiments of the invention, the first correction signal of the subcarrier n transmitting sending out passage by first business of a RRU isWherein, S (n) is reference signal or training signal, and p2 is the numbering that the first business sends out passage,Represent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage p2。

In some embodiments of the invention, second relative correction unit 1430 can specifically in the following way, with first reference value for reference, the business of a RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)};$

Wherein, above-mentionedRepresent first reference value corresponding to subcarrier n, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

In some embodiments of the invention, the first corresponding for subcarrier n receipts reference value

${\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)=e^{-j\·{\mathrm{\θ}}_{k1}^{UL}\left(n\right)};$

First corresponding for subcarrier n reference value ${\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)=e^{-j\·{\mathrm{\θ}}_{k1}^{DL}\left(n\right)};$

Wherein, ${\mathrm{\θ}}_{k1}^{DL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{DL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{DL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{DL}\right(n\left)\right),$

Wherein, ${\mathrm{\θ}}_{k1}^{UL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{UL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{UL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{UL}\right(n\left)\right),$

Wherein, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage i from correction coefficient, above-mentioned N_ANTRepresent that the business of a RRU is received passage or business and sent out the sum of passage,RepresentThe corresponding phase place in units of radian,RepresentThe phase place in units of radian。

In some embodiments of the invention, the first corresponding for subcarrier n receipts reference value ${\mathrm{\β}}_{k1,\mathrm{ref}}^{\mathrm{UL}}\left(n\right)={\mathrm{\β}}_{k1,p}^{\mathrm{UL}}\left(n\right),$ Wherein, above-mentionedRepresenting that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, above-mentioned business receives passage p and the first business receipts passage is identical or different。First corresponding for subcarrier n reference valueWherein, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, above-mentioned business send out passage p and the first business to send out passage identical or different。

In some embodiments of the invention, the first transmitter unit 1440 can be additionally used in, and sends out channel emission the 3rd correction signal by first business of a RRU；

Receive unit 1450 to be additionally operable to, receive channel reception by first business of a RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU；

Estimation unit 1460 can be additionally used in, according to by the first business receive channel reception to the 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to the 4th channel response, transmit the 4th penalty coefficient to the 3rd RRU own base station。

In some embodiments of the invention, the first transmitter unit 1440 can be additionally used in, and sends out channel emission the 5th correction signal by the 4th business of a RRU；

Receive unit 1450 to be additionally operable to, receive channel reception by the 4th business of a RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU,

Estimation unit 1460 can be additionally used in, according to by the 4th business receive channel reception to the 6th correction signal estimate the 6th channel response；And obtain the 6th penalty coefficient according to the 6th channel response；

Second transmitter unit 1470, transmits the 6th penalty coefficient to the 4th RRU own base station；

Wherein, the service signal of the oneth RRU receives and is corrected including based on the first receipts correction coefficient: each business of a RRU is received the service signal of passage and received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a RRU receiving passage corresponding based on each business is corrected；

The service signal of the oneth RRU is launched and is corrected including based on first correction coefficient: each business of a RRU is sent out the service signal of passage and launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a RRU and is corrected。

It is understood that the function of each functional module of the RRU channel correcting device 1400 of the present embodiment can implement according to the method in said method embodiment, it implements process and is referred to the associated description of said method embodiment, repeats no more herein。Wherein, RRU channel correcting device 1400 can be such as other device in BBU, controller or a RRU itself or a RRU own base station。

Referring to Figure 15, the embodiment of the present invention provides a kind of base station 1500, it may include:

As shown in figure 15, the base station 1500 of the present embodiment include at least one bus 1501, at least one processor 1502 of being connected with bus 1501 and at least one memorizer 1503 being connected with bus 1501。

Wherein, processor 1502 by bus 1501, call in memorizer 1503 code of storage for,

Perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first；Receive reference value for reference with first, the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient；With first reference value for reference, the business of the oneth RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, wherein, the service signal of the oneth RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；Channel emission the first correction signal is sent out by first business of a RRU；Passage is received by first business of a RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by first business receive channel reception to the second correction signal estimate second channel response, the second penalty coefficient is obtained according to second channel response, the second penalty coefficient is transmitted to the 2nd RRU own base station, wherein, the first business is received one of them business that passage is a RRU and is received passage；First business is sent out one of them business that passage is a RRU and is sent out passage。

In some embodiments of the invention, processor 1502 performs the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first, comprise the steps that the passage self-correcting performing a RRU, each business to obtain a RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, above-mentioned k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

In some embodiments of the invention, processor 1502 receives reference value for reference with first, the business of a RRU is sent out passage and carries out passage relative correction and comprise the steps that to obtain corresponding for RRU first correction coefficient

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)};$

Wherein, above-mentionedRepresent the first corresponding for subcarrier n receipts reference value, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

Wherein, the first receipts reference value that different sub carrier is corresponding can be identical or different。

In some embodiments of the invention, the first correction signal of the subcarrier n transmitting sending out passage by first business of a RRU isWherein, S (n) is reference signal or training signal, and p2 is the numbering that the first business sends out passage,Represent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage p2。

In some embodiments of the invention, ${\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)={\mathrm{\β}}_{k1,p}^{UL}\left(n\right);$

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)};$

Wherein, p represents the numbering in the second business collection of letters road, above-mentionedRepresent that the business of a RRU is received corresponding for subcarrier n the first of passage p and received self-correcting coefficient, can be byReference value is received as corresponding for subcarrier n first, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

Wherein, ${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)}.$

It is appreciated that nowEqual to 1。

In some embodiments of the invention, processor 1502 receives reference value for reference with first, the business of a RRU is sent out passage and carries out passage relative correction and may include that to obtain corresponding for RRU first correction coefficient

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)};$

Wherein, above-mentionedRepresent first reference value corresponding to subcarrier n, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

Wherein, first reference value that different sub carrier is corresponding can be identical or different。

In some embodiments of the invention, ${\mathrm{\β}}_{k1,ref}^{\mathrm{DL}}\left(n\right)={\mathrm{\β}}_{k1,p}^{\mathrm{DL}}\left(n\right);$

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, above-mentioned p represents that the second business sends out the numbering of passage, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, can be byAs first corresponding for subcarrier n reference value, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

Wherein, ${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)}.$

It is appreciated that under this application scenariosEqual to 1。

In other embodiments of the present invention, the first receipts reference value also can be other any nonzero value, for instance corresponding for subcarrier n first receives reference valueFirst reference value also can be other any nonzero value, for instance first corresponding for subcarrier n reference value ${\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)=e^{-j\·{\mathrm{\θ}}_{k1}^{DL}\left(n\right)};$

Wherein, ${\mathrm{\θ}}_{k1}^{DL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{DL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{DL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{DL}\right(n\left)\right),$

Wherein, ${\mathrm{\θ}}_{k1}^{UL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{UL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{UL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{UL}\right(n\left)\right),$

Wherein, above-mentionedRepresent that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

Wherein,Represent the phase place of each passage correspondence subcarrier n,Represent each the phase place receiving passage correspondence subcarrier n, wherein,WithUnit be radian。

Wherein, N_ANTRepresent and send out passage or receive total number of channels, if above-mentioned formula is to send out passage with business and business is sent out passage and started serial number to N from 0_ANT-1 is example, is not the scene of serial number, can also this analogize。

In some embodiments of the invention, the first corresponding for subcarrier n receipts reference value ${\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)={\mathrm{\β}}_{k1,p}^{UL}\left(n\right),$ Wherein, above-mentionedRepresenting that the business of a RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, above-mentioned business receives passage p and the first business receipts passage is identical or different。First corresponding for subcarrier n reference valueWherein, above-mentionedRepresent that the business of a RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, above-mentioned business send out passage p and the first business to send out passage identical or different。

In other embodiments of the present invention, ${\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)=1,{\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)=1.$

In some embodiments of the invention, processor 1502 assume to be sent out by first business of a RRU passage (assuming that it is that business sends out passage p2 that the first business sends out passage, wherein, if business is sent out passage and is started serial number from 0, then p2=0,1 ..N_ANT-1) the first correction signal that respective antenna is launched isThe first correction signal then arrived with reference to the n-th subcarrier reception receiving antenna corresponding to passage (this antenna antenna that such as reusable service channel is corresponding, or the antenna for individually disposing) by the correction of the 2nd RRUCan be:

${\tilde{r}}_{k2,c}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right)\·\tilde{s}\left(n\right).$

Wherein, by the correction of the 2nd RRU with reference to, after receipts channel reception to the first correction signal, channel estimating being carried out as follows:

${\mathrm{\γ}}_{k2,c}\left(n\right)=\frac{{\tilde{r}}_{k2,c}\left(n\right)}{s\left(n\right)}=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right)\·{\widetilde{\mathrm{\β}}}_{k1,p2}^{DL}\left(n\right).$

Wherein, γ_k2,cN () represents that the correction of the 2nd RRU is with reference to the first corresponding for the subcarrier n channel response receiving passage。

Wherein, obtain the first penalty coefficient according to the first channel response to comprise the steps that

${\mathrm{\μ}}_{k2}\left(n\right)={\mathrm{\γ}}_{k2,q}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right)\·{\widetilde{\mathrm{\β}}}_{k1,p2}^{DL}\left(n\right).$

Optionally, processor 1502 by first business of a RRU send out passage (assuming that selection business sends out passage p2, if business is sent out passage and is started serial number from 0, then p2=0,1 ..N_ANT-1) the first correction signal that respective antenna is launched is s (n), the first correction signal then arrived with reference to the n-th subcarrier reception receiving antenna corresponding to passage (this antenna antenna that such as reusable service channel is corresponding, or the antenna for individually disposing) by the correction of the 2nd RRUCan be:

${\tilde{r}}_{k2,c}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right)\·s\left(n\right).$

Wherein, by the correction of the 2nd RRU with reference to, after receipts channel reception to the first correction signal, channel estimating being carried out as follows:

${\mathrm{\γ}}_{k2,c}\left(n\right)=\frac{{\tilde{r}}_{k2,c}\left(n\right)}{s\left(n\right)}=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p2}^t\left(n\right).$

Wherein, γ_k2,cN () represents that the correction of the 2nd RRU is with reference to the first corresponding for the subcarrier n channel response receiving passage。

Further, the base station handle belonging to a RRUIt is sent to the 2nd RRU own base station。

Wherein, obtain the first penalty coefficient according to the first channel response to comprise the steps that

${\mathrm{\μ}}_{k2}\left(n\right)={\mathrm{\γ}}_{k2,q}\left(n\right)\·{\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=h_{k2}^{cr}\left(n\right)\·h_{comm,k2,k1}\left(n\right)\·h_{k1,p}^t\left(n\right)\·{\widetilde{\mathrm{\β}}}_{k1,p2}^{DL}\left(n\right).$

Wherein, μ_k2N () represents first penalty coefficient of corresponding subcarrier n。

Similar with the example above process, in some embodiments of the invention, assuming that the second correction signal of channel emission is sent out in the correction reference by the 2nd RRU is s (n), then receive passage (assuming that selection business receives passage p2 by first business of a RRU, wherein, if business is received passage and started serial number, then p2=0 from 0,1 ..N_ANT-1) the second correction signal that the subcarrier n of respective antenna receivesCan be:

${\tilde{r}}_{k1,p2}\left(n\right)={\widetilde{\mathrm{\β}}}_{k1,p2}^{UL}\left(n\right)\·h_{k1,p2}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right)\·s\left(n\right).$

Wherein, after receiving the second correction signal by the first business receipts passage p2 of a RRU, channel estimating can be carried out as follows:

${\mathrm{\γ}}_{k1,p2}\left(n\right)=\frac{{\tilde{r}}_{k1,p2}\left(n\right)}{s\left(n\right)}={\widetilde{\mathrm{\β}}}_{k1,p2}^{UL}\left(n\right)\·h_{k1,p2}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, γ_k1,pN () represents that first business of a RRU receives the second channel response corresponding for subcarrier n of passage p2。

Wherein, obtain the second penalty coefficient according to second channel response to comprise the steps that

${\mathrm{\μ}}_{k1}\left(n\right)={\mathrm{\γ}}_{k1,p2}\left(n\right)={\widetilde{\mathrm{\β}}}_{k1,p2}^{UL}\left(n\right)\·h_{k1,p2}^r\left(n\right)\·h_{comm,k1,k2}\left(n\right)\·h_{k2}^{ct}\left(n\right).$

Wherein, μ_k1N () represents second penalty coefficient of corresponding subcarrier n。The base station system of the oneth RRU is μ_k1N () is sent to the base station system of the 2nd RRU。

In some embodiments of the invention, if also introducing the 3rd RRU to carry out joint channel correction, processor 1502 is additionally operable to be sent out channel emission the 3rd correction signal by first business of a RRU；

Receive channel reception by first business of a RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, according to by first business receive channel reception to the 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to the 4th channel response, transmit the 4th penalty coefficient to the 3rd RRU own base station。

In some embodiments of the invention, the self-correction of the 3rd RRU own base station can be similar with the behavior of a RRU own base station with relative correction mode, and between RRU, compensation behavior can be similar with the behavior of the 2nd RRU own base station。

3rd RRU own base station concrete operations can be as follows:

Perform the passage self-correcting of the 3rd RRU, receive self-correcting coefficient and the 3rd from correction coefficient obtaining the 3rd the corresponding for RRU the 3rd；Receiving passage for reference with the 3rd business, the business receipts passage of the 3rd RRU is carried out passage relative correction to obtain the 3rd the 3rd corresponding for RRU receipts correction coefficient, wherein, the 3rd business is received one of them business that passage is the 3rd RRU and is received passage；Sending out passage for reference with the 3rd business, the business of the 3rd RRU is sent out passage and carries out passage relative correction to obtain corresponding for the 3rd RRU the 3rd correction coefficient, wherein, the 3rd business is sent out one of them business that passage is the 3rd RRU and is sent out passage；Passage is received by the 3rd business of the 3rd RRU, receive the first base station and sent out the 3rd correction signal of channel emission by first business of a RRU, according to by the 3rd business receive channel reception to the 3rd correction signal estimate the 3rd channel response, and obtain the 3rd penalty coefficient according to the 3rd channel response；Sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, and receive the 4th penalty coefficient that the first base station sends；Based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 3rd RRU service signal received based on the update the 3rd to be corrected, be corrected based on the 3rd correction coefficient by the 3rd RRU service signal launched；Or, based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd correction coefficient obtained is updated, wherein, it is corrected based on the 3rd correction coefficient updated by the 3rd RRU service signal launched, is received by the 3rd RRU service signal received and be corrected based on the 3rd receipts correction coefficient。

In some embodiments of the invention, processor 1502 is based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, receive correction coefficient by the obtained the 3rd and be multiplied by third phase penalty coefficient the 3rd is received correction coefficient with what obtain updating。

In other embodiments of the present invention, processor 1502 is based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, receive correction coefficient by the obtained the 3rd divided by the 4th relative penalty coefficient to obtain the 3rd receipts correction coefficient updated。

In some embodiments of the invention, processor 1502 is based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, by the obtained the 3rd correction coefficient divided by third phase to penalty coefficient with obtain update the 3rd correction coefficient

In other embodiments of the present invention, processor 1502 is based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, the obtained the 3rd correction coefficient is multiplied by the 4th relative penalty coefficient to obtain the 3rd correction coefficient updated。

In some embodiments of the invention, if also introducing the 4th RRU to carry out joint channel correction, processor 1502 sends out channel emission the 5th correction signal also by the 4th business of a RRU；

Receive channel reception by the 4th business of a RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, according to by the 4th business receive channel reception to the 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to the 6th channel response, transmit the 6th penalty coefficient to the 4th RRU own base station。

Wherein, the service signal of a RRU receives and is corrected including based on the first receipts correction coefficient:

Each business of the oneth RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a RRU receiving passage corresponding based on each business is corrected。

Wherein, the service signal transmitting of a RRU is corrected including based on first correction coefficient:

Each business of the oneth RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a RRU and is corrected。

In some embodiments of the invention, the behavior of the 4th RRU own base station is similar with the behavior of the 3rd RRU own base station。4th RRU own base station concrete operations can be as follows:

Perform the passage self-correcting of the 4th RRU, receive self-correcting coefficient and the 4th from correction coefficient obtaining the 4th the corresponding for RRU the 4th；Receiving passage for reference with the 5th business, the business receipts passage of the 4th RRU is carried out passage relative correction to obtain the 4th the 4th corresponding for RRU receipts correction coefficient, wherein, the 5th business is received one of them business that passage is the 4th RRU and is received passage；Sending out passage for reference with the 5th business, the business of the 4th RRU is sent out passage and carries out passage relative correction, to obtain corresponding for the 4th RRU the 4th correction coefficient, wherein, the 5th business is sent out one of them business that passage is the 4th RRU and is sent out passage；Passage is received by the 5th business of the 4th RRU, receive the first base station and sent out the 5th correction signal of channel emission by the 4th business of a RRU, according to by the 5th business receive channel reception to the 5th correction signal estimate the 5th channel response, and obtain the 5th penalty coefficient according to the 5th channel response；Sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, and receive the 6th penalty coefficient that the first base station sends；Based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 4th RRU service signal received based on the update the 4th to be corrected, be corrected based on the 4th correction coefficient by the 4th RRU service signal launched；Or, based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th correction coefficient obtained is updated, wherein, it is corrected based on the 4th correction coefficient updated by the 4th RRU service signal launched, is received by the 4th RRU service signal received and be corrected based on the 4th receipts correction coefficient。

It is appreciated that by introducing the 3rd RRU and the four RRU, building of complicated cell base station system can be advantageously implemented, and then be conducive to promoting power system capacity。

A kind of communication system is also provided for referring to Figure 16, the embodiment of the present invention, including:

First base station 1610 and the second base station 1620。

Wherein, the first base station 1610, for performing the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the oneth corresponding for RRU first；Receive reference value for reference with first, the business receipts passage of a RRU is carried out passage relative correction to obtain first corresponding for a RRU receipts correction coefficient；With first reference value for reference, the business of the oneth RRU is sent out passage and carries out passage relative correction to obtain first corresponding for RRU correction coefficient, wherein, the service signal of the oneth RRU receives and is corrected based on the first receipts correction coefficient, and the service signal transmitting of a RRU is corrected based on first correction coefficient；Channel emission the first correction signal is sent out by first business of a RRU；Passage is received by first business of a RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by first business receive channel reception to the second correction signal estimate second channel response, the second penalty coefficient is obtained according to second channel response, the second penalty coefficient is transmitted to the second base station 1520 belonging to the 2nd RRU, wherein, the first business is received one of them business that passage is a RRU and is received passage；First business is sent out one of them business that passage is a RRU and is sent out passage；

Second base station 1620, for performing the passage self-correcting of the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the 2nd corresponding for RRU second；By the correction of the 2nd RRU with reference to receiving passage, receive the first base station and sent out the first correction signal of channel emission by first business of a RRU, according to by the correction of the 2nd RRU with reference to receive channel reception to the first correction signal estimate the first channel response, and obtain the first penalty coefficient according to the first channel response；By the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, and receive the second penalty coefficient that the first base station sends；Receive self-correcting coefficient obtain the second receipts correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, receive correction coefficient by the 2nd RRU service signal received based on second to be corrected, be corrected from correction coefficient based on second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on the first penalty coefficient, the second penalty coefficient and second, wherein, it is corrected based on second correction coefficient by the 2nd RRU service signal launched, is received by the 2nd RRU service signal received and be corrected based on the second receipts self-correcting coefficient。

Referring to Figure 17, in some embodiments of the invention, communication system also includes: the 3rd base station 1630。

Wherein, the first base station 1610 is additionally operable to, and sends out channel emission the 3rd correction signal by first business of a RRU；Receive channel reception by first business of a RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, according to by first business receive channel reception to the 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to the 4th channel response, transmit the 4th penalty coefficient to the 3rd RRU own base station。

In some embodiments of the invention, the 3rd base station 1630 can be used for, and performs the passage self-correcting of the 3rd RRU, receives self-correcting coefficient and the 3rd from correction coefficient obtaining the 3rd the corresponding for RRU the 3rd；Receiving passage for reference with the 3rd business, the business receipts passage of the 3rd RRU is carried out passage relative correction to obtain the 3rd the 3rd corresponding for RRU receipts correction coefficient, wherein, the 3rd business is received one of them business that passage is the 3rd RRU and is received passage；Sending out passage for reference with the 3rd business, the business of the 3rd RRU is sent out passage and carries out passage relative correction to obtain corresponding for the 3rd RRU the 3rd correction coefficient, wherein, the 3rd business is sent out one of them business that passage is the 3rd RRU and is sent out passage；Passage is received by the 3rd business of the 3rd RRU, receive the first base station and sent out the 3rd correction signal of channel emission by first business of a RRU, according to by the 3rd business receive channel reception to the 3rd correction signal estimate the 3rd channel response, and obtain the 3rd penalty coefficient according to the 3rd channel response；Sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, and receive the 4th penalty coefficient that the first base station sends；Based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 3rd RRU service signal received based on the update the 3rd to be corrected, be corrected based on the 3rd correction coefficient by the 3rd RRU service signal launched；Or, based on the 3rd penalty coefficient and the 4th penalty coefficient, the 3rd correction coefficient obtained is updated, wherein, it is corrected based on the 3rd correction coefficient updated by the 3rd RRU service signal launched, is received by the 3rd RRU service signal received and be corrected based on the 3rd receipts correction coefficient。

In some embodiments of the invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, receive correction coefficient by the obtained the 3rd and be multiplied by third phase penalty coefficient the 3rd is received correction coefficient with what obtain updating。

In other embodiments of the present invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the obtained the 3rd and receive correction coefficient, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, receive correction coefficient by the obtained the 3rd divided by the 4th relative penalty coefficient to obtain the 3rd receipts correction coefficient updated。

In some embodiments of the invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 4th penalty coefficient divided by the 3rd penalty coefficient to obtain third phase to penalty coefficient, by the obtained the 3rd correction coefficient divided by third phase to penalty coefficient with obtain update the 3rd correction coefficient

In other embodiments of the present invention, based on the 3rd penalty coefficient and the 4th penalty coefficient, update the 3rd correction coefficient obtained, comprise the steps that the 3rd penalty coefficient divided by the 4th penalty coefficient to obtain the 4th relative penalty coefficient, the obtained the 3rd correction coefficient is multiplied by the 4th relative penalty coefficient to obtain the 3rd correction coefficient updated。

Referring to Figure 18 or Figure 19, in some embodiments of the invention, communication system also includes: the 4th base station 1640。

Wherein, the first base station 1610 can be additionally used in, and sends out channel emission the 5th correction signal by the 4th business of a RRU；Receive channel reception by the 4th business of a RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, according to by the 4th business receive channel reception to the 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to the 6th channel response, transmit the 6th penalty coefficient to the 4th RRU own base station。Wherein, each business of the oneth RRU is received the service signal of passage and is received, the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a RRU receiving passage corresponding based on each business is corrected, each business of the oneth RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a RRU and is corrected。

In some embodiments of the invention, the 4th base station 1640 can be used for, and performs the passage self-correcting of the 4th RRU, receives self-correcting coefficient and the 4th from correction coefficient obtaining the 4th the corresponding for RRU the 4th；Receiving passage for reference with the 5th business, the business receipts passage of the 4th RRU is carried out passage relative correction to obtain the 4th the 4th corresponding for RRU receipts correction coefficient, wherein, the 5th business is received one of them business that passage is the 4th RRU and is received passage；Sending out passage for reference with the 5th business, the business of the 4th RRU is sent out passage and carries out passage relative correction, to obtain corresponding for the 4th RRU the 4th correction coefficient, wherein, the 5th business is sent out one of them business that passage is the 4th RRU and is sent out passage；Passage is received by the 5th business of the 4th RRU, receive the first base station and sent out the 5th correction signal of channel emission by the 4th business of a RRU, according to by the 5th business receive channel reception to the 5th correction signal estimate the 5th channel response, and obtain the 5th penalty coefficient according to the 5th channel response；Sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, and receive the 6th penalty coefficient that the first base station sends；Based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th receipts correction coefficient obtained is updated, wherein, receive correction coefficient by the 4th RRU service signal received based on the update the 4th to be corrected, be corrected based on the 4th correction coefficient by the 4th RRU service signal launched；Or, based on the 5th penalty coefficient and the 6th penalty coefficient, the 4th correction coefficient obtained is updated, wherein, it is corrected based on the 4th correction coefficient updated by the 4th RRU service signal launched, is received by the 4th RRU service signal received and be corrected based on the 4th receipts correction coefficient。

It is appreciated that by introducing the 3rd base station and the 4th base station, building of complicated cell base station system can be advantageously implemented, and then be conducive to promoting power system capacity。

Wherein, the first base station 1610, base station the 1630, the 4th, the 1610, second base station the 1620, the 3rd, base station is likely to a shared BBU, or is deployed in same position。

The embodiment of the present invention also provides for a kind of computer-readable storage medium, and wherein, this computer-readable storage medium can have program stored therein, and this program includes the part or all of step of the RRU joint channel bearing calibration recorded in said method embodiment when performing。

It should be noted that, for aforesaid each embodiment of the method, in order to be briefly described, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously。Secondly, those skilled in the art also should know, embodiment described in this description belongs to preferred embodiment, necessary to involved action and the module not necessarily present invention。

In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, certain embodiment there is no the part described in detail, it is possible to referring to the associated description of other embodiments。

In several embodiments provided herein, it should be understood that disclosed device, can realize by another way。Such as, device embodiment described above is merely schematic, the such as division of described unit, it is only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not perform。Another point, shown or discussed coupling each other or direct-coupling or communication connection can be through INDIRECT COUPLING or the communication connection of some interfaces, device or unit, it is possible to be electrical or other form。

The described unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE。Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme。

It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in a unit。Above-mentioned integrated unit both can adopt the form of hardware to realize, it would however also be possible to employ the form of SFU software functional unit realizes。

If described integrated unit is using the form realization of SFU software functional unit and as independent production marketing or use, it is possible to be stored in a computer read/write memory medium。Based on such understanding, part or all or part of of this technical scheme that prior art is contributed by technical scheme substantially in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can for personal computer, server or the network equipment etc.) performs all or part of step of method described in each embodiment of the present invention。And aforesaid storage medium includes: USB flash disk, read only memory (ROM, Read-OnlyMemory), the various media that can store program code such as random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD。

The above, above example only in order to technical scheme to be described, is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme。

Claims (36)

1. the channel combined bearing calibration of long-distance radio frequency unit RRU, it is characterised in that including:

Perform the passage self-correcting of the 2nd RRU, receive self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second；

By the correction of described 2nd RRU with reference to receiving passage, receive the first correction signal being sent out channel emission by first business of a RRU, according to by the correction of described 2nd RRU with reference to receive channel reception to described first correction signal estimate the first channel response, and obtain the first penalty coefficient according to described first channel response；

By the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, and receive the second penalty coefficient, wherein, described second penalty coefficient obtains based on second channel response, the response of described second channel be to by first business of a described RRU receive channel reception to described second correction signal carry out channel estimating and obtain；

Receive self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, receive correction coefficient by the described 2nd RRU service signal received based on described second to be corrected, be corrected from correction coefficient based on described second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, it is corrected based on described second correction coefficient by the described 2nd RRU service signal launched, is received by the described 2nd RRU service signal received and be corrected based on described second receipts self-correcting coefficient。

2. method according to claim 1, it is characterized in that, the passage self-correcting of described execution the 2nd RRU, receive self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second, including: perform the passage self-correcting of the 2nd RRU, each business to obtain described 2nd RRU send out each subcarrier of passage corresponding second from correction coefficient, and each business obtaining described 2nd RRU receive each subcarrier of passage corresponding second receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k2,i}^{UL}\left(n\right)=\frac{1}{h_{k2}^{ct}\left(n\right)h_{k2,i}^r\left(n\right)};{\mathrm{\β}}_{k2,i}^{DL}\left(n\right)=\frac{1}{h_{k2}^{cr}\left(n\right)h_{k2,i}^t\left(n\right)};$

Wherein, described k2 represents the numbering of the 2nd RRU, described inRepresent that the business of the 2nd RRU receives passage i channel response on subcarrier n, described inRepresent that the described correction of the 2nd RRU is with reference to receiving passage channel response on subcarrier n, described inRepresent that the described correction of the 2nd RRU is with reference to sending out passage channel response on subcarrier n, described inRepresent that the business of the 2nd RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of described 2nd RRU receives second corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of described 2nd RRU sends out corresponding for subcarrier n second of passage i from correction coefficient。

3. method according to claim 1 and 2, it is characterised in that

Described based on described first penalty coefficient, described second penalty coefficient and described second receive self-correcting coefficient obtain the second receipts correction coefficient, including: by described second penalty coefficient divided by described first penalty coefficient to obtain first-phase to penalty coefficient, receive self-correcting coefficient by described second and be multiplied by described first-phase to penalty coefficient to obtain the second receipts correction coefficient；Or, by described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, by described second receive self-correcting coefficient divided by described second-phase to penalty coefficient to obtain the second receipts correction coefficient。

4. method according to claim 1 and 2, it is characterised in that

Described obtain second correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second from correction coefficient, including: by described second penalty coefficient divided by described first penalty coefficient to obtain first-phase to penalty coefficient, by described second from correction coefficient divided by described first-phase to penalty coefficient to obtain second correction coefficient；Or, by described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, it is multiplied by described second-phase to penalty coefficient to obtain second correction coefficient by described second from correction coefficient。

5. the channel combined bearing calibration of long-distance radio frequency unit RRU, it is characterised in that including:

Perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；

Receiving passage for reference with the first business, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, wherein, described first business is received one of them business that passage is a described RRU and is received passage；

Sending out passage for reference with the first business, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, described first business is sent out one of them business that passage is a described RRU and is sent out passage；Wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；

Channel emission the first correction signal is sent out by described first business of a described RRU；

Passage is received by described first business of a described RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by described first business receive channel reception to described second correction signal estimate second channel response, and obtain the second penalty coefficient according to the response of described second channel, transmit described second penalty coefficient to described 2nd RRU own base station。

6. method according to claim 5, it is characterized in that, the passage self-correcting of described execution the oneth RRU, receive self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first, including: perform the passage self-correcting of a RRU, each business to obtain a described RRU send out each subcarrier of passage corresponding first from correction coefficient, and each business obtaining a described RRU receive each subcarrier of passage corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, described k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

7. method according to claim 6, it is characterised in that

Described receive passage for reference with the first business, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)};$

Wherein, described p represents the numbering in the first business collection of letters road, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

8. the method according to claim 6 or 7, it is characterised in that

Described send out passage for reference with the first business, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, described p represents that the first business sends out the numbering of passage, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

9. the method according to any one of claim 5 to 7, it is characterised in that

Described method also includes:

Channel emission the 3rd correction signal is sent out by described first business of a described RRU；

Receive channel reception by described first business of a described RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, according to by described first business receive channel reception to described 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to described 4th channel response, transmit described 4th penalty coefficient to described 3rd RRU own base station。

10. the method according to any one of claim 5 to 7, it is characterised in that

Described method also includes:

Channel emission the 5th correction signal is sent out by the 4th business of a described RRU；

Receive channel reception by the 4th business of a described RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, according to by described 4th business receive channel reception to described 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to described 6th channel response, transmit described 6th penalty coefficient to described 4th RRU own base station；

The service signal of a described RRU receives and is corrected including based on described first receipts correction coefficient:

Each business of a described RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a described RRU receiving passage corresponding based on each business is corrected；

The service signal transmitting of a described RRU is corrected including based on described first correction coefficient:

Each business of a described RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a described RRU and is corrected。

11. a long-distance radio frequency unit RRU channel correcting device, it is characterised in that including:

Self-level unit, for performing the passage self-correcting of the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second；

First receives unit, for receiving passage by the correction reference of described 2nd RRU, receives the first correction signal being sent out channel emission by first business of a RRU；

Estimation unit, for according to by the correction of described 2nd RRU with reference to receive channel reception to described first correction signal estimate the first channel response, and obtain the first penalty coefficient according to described first channel response；

Transmitter unit, for sending out the second correction signal of channel emission by the correction reference of described 2nd RRU；

Second receives unit, for receiving the second penalty coefficient, wherein, described second penalty coefficient obtains based on second channel response, the response of described second channel be to by first business of a described RRU receive channel reception to described second correction signal carry out channel estimating and obtain；

Correction unit, for receiving self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, receive correction coefficient by the described 2nd RRU service signal received based on described second to be corrected, be corrected from correction coefficient based on described second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, it is corrected based on described second correction coefficient by the described 2nd RRU service signal launched, is received by the described 2nd RRU service signal received and be corrected based on described second receipts self-correcting coefficient。

12. device according to claim 11, it is characterized in that, described self-level unit, specifically for performing the passage self-correcting of the 2nd RRU, each business to obtain described 2nd RRU send out each subcarrier of passage corresponding second from correction coefficient, and obtain described 2nd RRU each business receive passage each subcarrier corresponding second receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k2,i}^{UL}\left(n\right)=\frac{1}{h_{k2}^{ct}\left(n\right)h_{k2,i}^r\left(n\right)};{\mathrm{\β}}_{k2,i}^{DL}\left(n\right)=\frac{1}{h_{k2}^{cr}\left(n\right)h_{k2,i}^t\left(n\right)};$

Wherein, described k2 represents the numbering of the 2nd RRU, described inRepresent that the business of the 2nd RRU receives passage i channel response on subcarrier n, described inRepresent that the described correction of the 2nd RRU is with reference to receiving passage channel response on subcarrier n, described inRepresent that the described correction of the 2nd RRU is with reference to sending out passage channel response on subcarrier n, described inRepresent that the business of the 2nd RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of described 2nd RRU receives second corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of described 2nd RRU sends out corresponding for subcarrier n second of passage i from correction coefficient。

13. the device according to claim 11 or 12, it is characterised in that

Described correction unit specifically for, receive self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, including: by described second penalty coefficient divided by described first penalty coefficient to obtain first-phase to penalty coefficient, receive self-correcting coefficient by described second and be multiplied by described first-phase to penalty coefficient to obtain the second receipts correction coefficient；Or, by described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, by described second receive self-correcting coefficient divided by described second-phase to penalty coefficient to obtain the second receipts correction coefficient；

Or,

Described correction unit specifically for, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, including: by described second penalty coefficient divided by described first penalty coefficient to obtain first-phase to penalty coefficient, by described second from correction coefficient divided by described first-phase to penalty coefficient to obtain second correction coefficient；Or, by described first penalty coefficient divided by described second penalty coefficient to obtain second-phase to penalty coefficient, it is multiplied by described second-phase to penalty coefficient to obtain second correction coefficient by described second from correction coefficient。

14. a long-distance radio frequency unit RRU channel correcting device, it is characterised in that including:

Self-level unit, for performing the passage self-correcting of a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；

First relative correction unit, for receiving passage for reference with the first business, the business of a described RRU being received passage carry out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, wherein, described first business is received one of them business that passage is a described RRU and is received passage；

Second relative correction unit, for sending out passage for reference with the first business, the business of a described RRU being sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, described first business is sent out one of them business that passage is a described RRU and is sent out passage；Wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；

First transmitter unit, for sending out channel emission the first correction signal by described first business of a described RRU；

Receive unit, for receiving passage by described first business of a described RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission；

Estimation unit, for according to described reception unit by described first business receive channel reception to described second correction signal estimate second channel response, and according to described second channel respond obtain the second penalty coefficient；

Second transmitter unit, for transmitting described second penalty coefficient to described 2nd RRU own base station。

15. device according to claim 14, it is characterised in that

Described self-level unit specifically for, perform the passage self-correcting of a RRU, each business to obtain a described RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a described RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, described k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

16. device according to claim 15, it is characterised in that

First relative correction unit, specifically in the following way, receives passage for reference with the first business, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, wherein,

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{UL}\left(n\right)};$

Wherein, described p represents the numbering in the first business collection of letters road, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

17. the device according to claim 15 or 16, it is characterised in that

Described second relative correction unit, specifically in the following way, sending out passage for reference with the first business, sends out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient the business of a described RRU, wherein,

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,p}^{DL}\left(n\right)};$

Wherein, described p represents that the first business sends out the numbering of passage, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

18. according to the device described in any one of claim 14 to 16, it is characterised in that

Described first transmitter unit is additionally operable to, and sends out channel emission the 3rd correction signal by described first business of a described RRU；

Described reception unit is additionally operable to, and receives channel reception by described first business of a described RRU and is sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU,

Described estimation unit is additionally operable to, according to by described first business receive channel reception to described 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to described 4th channel response；

Described second transmitter unit is additionally operable to, and transmits described 4th penalty coefficient to described 3rd RRU own base station。

19. according to the device described in any one of claim 14 to 16, it is characterised in that

Described first transmitter unit is additionally operable to, and sends out channel emission the 5th correction signal by the 4th business of a described RRU；

Described reception unit is additionally operable to, and receives channel reception by the 4th business of a described RRU and is sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU,

Described estimation unit is additionally operable to, according to by described 4th business receive channel reception to described 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to described 6th channel response；

Described second transmitter unit is additionally operable to, and transmits described 6th penalty coefficient to described 4th RRU own base station；

Wherein, each business of a described RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a described RRU receiving passage corresponding based on each business is corrected；Each business of a described RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a described RRU and is corrected。

20. a communication system, it is characterised in that including:

First base station, for performing the passage self-correcting of a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；Receiving passage for reference with the first business, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, wherein, described first business is received one of them business that passage is a described RRU and is received passage；Sending out passage for reference with the first business, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, described first business is sent out one of them business that passage is a described RRU and is sent out passage；Wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；Channel emission the first correction signal is sent out by described first business of a described RRU；Passage is received by described first business of a described RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by described first business receive channel reception to described second correction signal estimate second channel response, and obtain the second penalty coefficient according to the response of described second channel, transmit described second penalty coefficient to the second base station belonging to described 2nd RRU；

Described second base station, for performing the passage self-correcting of the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second；By the correction of described 2nd RRU with reference to receiving passage, receive the first correction signal being sent out channel emission by first business of a RRU, according to by the correction of described 2nd RRU with reference to receive channel reception to described first correction signal estimate the first channel response, and obtain the first penalty coefficient according to described first channel response；By the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, and receive described second penalty coefficient that described first base station sends；Receive self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein receive correction coefficient by the described 2nd RRU service signal received based on described second to be corrected, be corrected from correction coefficient based on described second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, it is corrected based on described second correction coefficient by the described 2nd RRU service signal launched, is received by the described 2nd RRU service signal received and be corrected based on described second receipts self-correcting coefficient。

21. communication system according to claim 20, it is characterised in that

Described communication system also includes: the 3rd base station,

Wherein, described first base station is additionally operable to, and sends out channel emission the 3rd correction signal by described first business of a described RRU；Receive the 3rd base station described in channel reception by described first business of a described RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, according to by described first business receive channel reception to described 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to described 4th channel response, transmit described 4th penalty coefficient to the 3rd base station belonging to described 3rd RRU；

Described 3rd base station is used for, and performs the passage self-correcting of the 3rd RRU, receives self-correcting coefficient and the 3rd from correction coefficient obtaining the described 3rd the corresponding for RRU the 3rd；Receiving passage for reference with the 3rd business, the business of described 3rd RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described 3rd the corresponding for RRU the 3rd, wherein, described 3rd business is received one of them business that passage is described 3rd RRU and is received passage；Sending out passage for reference with the 3rd business, the business of described 3rd RRU is sent out passage and carries out passage relative correction to obtain described the 3rd corresponding for 3rd RRU correction coefficient, wherein, described 3rd business is sent out one of them business that passage is described 3rd RRU and is sent out passage；

Passage is received by the 3rd business of described 3rd RRU, receive described first base station and sent out the 3rd correction signal of channel emission by first business of a RRU, according to by described 3rd business receive channel reception to described 3rd correction signal estimate the 3rd channel response, and obtain the 3rd penalty coefficient according to described 3rd channel response；Sent out the 4th correction signal of channel emission by the 3rd business of described 3rd RRU, and receive described 4th penalty coefficient that described first base station sends；

Receive correction coefficient based on described 3rd penalty coefficient and described 4th penalty coefficient to the obtained the described 3rd to be updated, wherein, receive correction coefficient by the described 3rd RRU service signal received based on the update the described 3rd to be corrected, be corrected based on described 3rd correction coefficient by the 3rd RRU service signal launched；Or, based on described 3rd penalty coefficient and described 4th penalty coefficient, the 3rd correction coefficient obtained is updated, wherein, it is corrected based on described 3rd correction coefficient updated by the described 3rd RRU service signal launched, is received by the described 3rd RRU service signal received and be corrected based on described 3rd receipts correction coefficient。

22. the communication system according to claim 20 or 21, it is characterised in that

Described communication system also includes: the 4th base station,

Wherein, described first base station is additionally operable to, and sends out channel emission the 5th correction signal by the 4th business of a described RRU；Receive channel reception by the 4th business of a described RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, according to by described 4th business receive channel reception to described 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to described 6th channel response, transmit described 6th penalty coefficient to described 4th RRU own base station；Wherein, each business of a described RRU is received the service signal of passage and is received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a described RRU receiving passage corresponding based on each business is corrected；Each business of a described RRU is sent out the service signal of passage and is launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a described RRU and is corrected；

Described 4th base station is used for, and performs the passage self-correcting of the 4th RRU, receives self-correcting coefficient and the 4th from correction coefficient obtaining the described 4th the corresponding for RRU the 4th；Receiving passage for reference with the 5th business, the business of described 4th RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described 4th the corresponding for RRU the 4th, wherein, described 5th business is received one of them business that passage is described 4th RRU and is received passage；Sending out passage for reference with the 5th business, the business of described 4th RRU is sent out passage and carries out passage relative correction, to obtain described the 4th corresponding for 4th RRU correction coefficient, wherein, described 5th business is sent out one of them business that passage is described 4th RRU and is sent out passage；

Passage is received by the 5th business of described 4th RRU, receive described first base station and sent out the 5th correction signal of channel emission by the 4th business of a RRU, according to by described 5th business receive channel reception to described 5th correction signal estimate the 5th channel response, and obtain the 5th penalty coefficient according to described 5th channel response；Sent out the 6th correction signal of channel emission by the 5th business of described 4th RRU, and receive described 6th penalty coefficient that described first base station sends；

Receive correction coefficient based on described 5th penalty coefficient and described 6th penalty coefficient to the obtained the described 4th to be updated, wherein, receive correction coefficient by the described 4th RRU service signal received based on the update the described 4th to be corrected, be corrected based on described 4th correction coefficient by the 4th RRU service signal launched；Or, based on described 5th penalty coefficient and described 6th penalty coefficient, the 4th correction coefficient obtained is updated, wherein, it is corrected based on described 4th correction coefficient updated by the described 4th RRU service signal launched, is received by the described 4th RRU service signal received and be corrected based on described 4th receipts correction coefficient。

23. the channel combined bearing calibration of long-distance radio frequency unit RRU, it is characterised in that including:

Perform the passage self-correcting of a RRU, receive self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；

Receive reference value for reference with first, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first；

With first reference value for reference, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；

Channel emission the first correction signal is sent out by first business of a described RRU；

Passage is received by first business of a described RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by described first business receive channel reception to described second correction signal estimate second channel response, the second penalty coefficient is obtained according to second channel response, described second penalty coefficient is transmitted to described 2nd RRU own base station, wherein, described first business is received one of them business that passage is a described RRU and is received passage；Described first business is sent out one of them business that passage is a described RRU and is sent out passage。

24. method according to claim 23, it is characterised in that

The passage self-correcting of described execution the oneth RRU, receive self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first, including: perform the passage self-correcting of a RRU, each business to obtain a described RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a described RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, described k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

25. method according to claim 24, it is characterised in that

Described receive reference value for reference with first, the business of a described RRU is sent out passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)};$

Wherein, described inRepresent the first corresponding for subcarrier n receipts reference value, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

26. the method according to claim 24 or 25, it is characterised in that

Described with first reference value for reference, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)};$

Wherein, described inRepresent first reference value corresponding to subcarrier n, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

27. according to claim method according to claim 26, it is characterised in that

First correction signal of the subcarrier n transmitting that described the first business by a described RRU sends out passage isWherein, S (n) is reference signal or training signal, and p2 is the numbering that the first business sends out passage, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage p2。

28. according to claim method according to any one of claim 23 to 25, it is characterised in that

Corresponding for subcarrier n first receives reference valueOr, corresponding for subcarrier n first receives reference valueWherein, described inRepresenting that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, described business receives passage p and the first business receipts passage is identical or different；

First corresponding for subcarrier n reference valueOr, first corresponding for subcarrier n reference valueWherein, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, described business send out passage p and the first business to send out passage identical or different；

Wherein, ${\mathrm{\θ}}_{k1}^{DL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{DL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{DL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{DL}\right(n\left)\right),$

Wherein, ${\mathrm{\θ}}_{k1}^{UL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{UL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{UL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{UL}\right(n\left)\right),$

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient, described N_ANTRepresent that the business of a described RRU is received passage or business and sent out the sum of passage,RepresentThe corresponding phase place in units of radian,RepresentThe phase place in units of radian。

29. according to the method described in any one of claim 23 to 25, it is characterised in that

Described method also includes:

Channel emission the 3rd correction signal is sent out by described first business of a described RRU；

Receive channel reception by described first business of a described RRU and sent out the 4th correction signal of channel emission by the 3rd business of the 3rd RRU, according to by described first business receive channel reception to described 4th correction signal estimate the 4th channel response, and obtain the 4th penalty coefficient according to described 4th channel response, transmit described 4th penalty coefficient to described 3rd RRU own base station。

30. according to the method described in any one of claim 23 to 25, it is characterised in that

Described method also includes:

Channel emission the 5th correction signal is sent out by the 4th business of a described RRU；Receive channel reception by the 4th business of a described RRU and sent out the 6th correction signal of channel emission by the 5th business of the 4th RRU, according to by described 4th business receive channel reception to described 6th correction signal estimate the 6th channel response, and obtain the 6th penalty coefficient according to described 6th channel response, transmit described 6th penalty coefficient to described 4th RRU own base station；

The service signal of a described RRU receives and is corrected including based on described first receipts correction coefficient: each business of a described RRU is received the service signal of passage and received, and the first the first ratio receiving correction coefficient receiving correction coefficient corresponding with the 4th business receipts passage of a described RRU receiving passage corresponding based on each business is corrected；

The service signal of a described RRU is launched and is corrected including based on described first correction coefficient: each business of a described RRU is sent out the service signal of passage and launched, and sends out, based on each business, the ratio that first correction coefficient corresponding to passage send out first correction coefficient corresponding to passage with the 4th business of a described RRU and is corrected。

31. the channel combined correcting unit of long-distance radio frequency unit RRU, it is characterised in that including:

Self-level unit, performs the passage self-correcting of a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；

First relative correction unit, for receiving reference value for reference with first, receives passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first the business of a described RRU；

Second relative correction unit, for with first reference value for reference, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；

First transmitter unit, for sending out channel emission the first correction signal by first business of a described RRU, described first business is sent out one of them business that passage is a described RRU and is sent out passage；

Receiving unit, for receiving passage by first business of a described RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, wherein, described first business is received one of them business that passage is a described RRU and is received passage；

Estimation unit, for according to by described first business receive channel reception to described second correction signal estimate second channel response, according to second channel response obtain the second penalty coefficient；

Second transmitter unit, transmits described second penalty coefficient to described 2nd RRU own base station。

32. device according to claim 31, it is characterised in that

Described self-level unit specifically for, perform the passage self-correcting of a RRU, each business to obtain a described RRU send out each subcarrier of passage corresponding first from correction coefficient, and obtain a described RRU each business receive passage each subcarrier corresponding first receive self-correcting coefficient, wherein

${\mathrm{\β}}_{k1,i}^{UL}\left(n\right)=\frac{1}{h_{k1}^{ct}\left(n\right)h_{k1,i}^r\left(n\right)};{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)=\frac{1}{h_{k1}^{cr}\left(n\right)h_{k1,i}^t\left(n\right)};$

Wherein, described k1 represents the numbering of a RRU,Represent that the business of a RRU receives passage i channel response on subcarrier n,Represent that the correction of a RRU is with reference to receiving passage channel response on subcarrier n,Represent that the correction of a RRU is with reference to sending out passage channel response on subcarrier n；Represent that the business of a RRU sends out passage i channel response on subcarrier n；

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient。

33. device according to claim 32, it is characterised in that

First relative correction unit, specifically in the following way, receives reference value for reference with first, the business of a described RRU is sent out passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{UL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{UL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{UL}\left(n\right)};$

Wherein, described inRepresent the first corresponding for subcarrier n receipts reference value, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts correction coefficient of passage i。

34. the device according to claim 32 or 33, it is characterised in that

Described second relative correction unit, specifically in the following way, with first reference value for reference, sends out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient the business of a described RRU, including:

${\widetilde{\mathrm{\β}}}_{k1,i}^{DL}\left(n\right)=\frac{{\mathrm{\β}}_{k1,i}^{DL}\left(n\right)}{{\mathrm{\β}}_{k1,ref}^{DL}\left(n\right)};$

Wherein, described inRepresent first reference value corresponding to subcarrier n, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first correction coefficient of passage i。

35. according to claim device according to any one of claim 31 to 33, it is characterised in that

Corresponding for subcarrier n first receives reference valueOr, corresponding for subcarrier n first receives reference valueWherein, described inRepresenting that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage p, described business receives passage p and the first business receipts passage is identical or different；

First corresponding for subcarrier n reference valueOr, first corresponding for subcarrier n reference valueWherein, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage p from correction coefficient, described business send out passage p and the first business to send out passage identical or different；

Wherein, ${\mathrm{\θ}}_{k1}^{DL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{DL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{DL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{DL}\right(n\left)\right),$

Wherein, ${\mathrm{\θ}}_{k1}^{UL}\left(n\right)=\frac{1}{N_{ANT}}\underset{i=0}{\overset{N_{ANT}-1}{\Σ}}{\mathrm{\θ}}_{k1,i}^{UL}\left(n\right),$

${\mathrm{\θ}}_{k1,i}^{UL}\left(n\right)=angle\left({\mathrm{\β}}_{k1,i}^{UL}\right(n\left)\right),$

Wherein, described inRepresent that the business of a described RRU receives first corresponding for the subcarrier n receipts self-correcting coefficient of passage i, described inRepresent that the business of a described RRU sends out corresponding for subcarrier n first of passage i from correction coefficient, described N_ANTRepresent that a described RRU business receipts passage or business send out the sum of passage,RepresentThe corresponding phase place in units of radian,RepresentThe phase place in units of radian。

36. a communication system, it is characterised in that including:

First base station, for performing the passage self-correcting of a RRU, receives self-correcting coefficient and first from correction coefficient obtaining the described oneth corresponding for RRU first；Receive reference value for reference with first, the business of a described RRU is received passage and carries out passage relative correction and receive correction coefficient to obtain the described oneth corresponding for RRU first；With first reference value for reference, the business of a described RRU is sent out passage and carries out passage relative correction to obtain described corresponding for RRU first correction coefficient, wherein, the service signal of a described RRU receives and is corrected based on described first receipts correction coefficient, and the service signal transmitting of a described RRU is corrected based on described first correction coefficient；Channel emission the first correction signal is sent out by first business of a described RRU；Passage is received by first business of a described RRU, receive by the correction of the 2nd RRU with reference to the second correction signal sending out channel emission, according to by described first business receive channel reception to described second correction signal estimate second channel response, the second penalty coefficient is obtained according to second channel response, described second penalty coefficient is transmitted to the second base station belonging to described 2nd RRU, wherein, described first business is received one of them business that passage is a described RRU and is received passage；Described first business is sent out one of them business that passage is a described RRU and is sent out passage；

Described second base station, for performing the passage self-correcting of the 2nd RRU, receives self-correcting coefficient and second from correction coefficient obtaining the described 2nd corresponding for RRU second；By the correction of described 2nd RRU with reference to receiving passage, receive described first base station and sent out the first correction signal of channel emission by first business of a RRU, according to by the correction of described 2nd RRU with reference to receive channel reception to described first correction signal estimate the first channel response, and obtain the first penalty coefficient according to described first channel response；By the correction of described 2nd RRU with reference to the second correction signal sending out channel emission, and receive described second penalty coefficient that described first base station sends；Receive self-correcting coefficient obtain the second receipts correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, receive correction coefficient by the described 2nd RRU service signal received based on described second to be corrected, be corrected from correction coefficient based on described second by the 2nd RRU service signal launched；Or, second correction coefficient is obtained from correction coefficient based on described first penalty coefficient, described second penalty coefficient and described second, wherein, it is corrected based on described second correction coefficient by the described 2nd RRU service signal launched, is received by the described 2nd RRU service signal received and be corrected based on described second receipts self-correcting coefficient。