CN102957467A

CN102957467A - Method and system for processing signals of multiple antennas in downlink system

Info

Publication number: CN102957467A
Application number: CN2011102440303A
Authority: CN
Inventors: 郑勇; 孙云锋; 陈艺戬; 郭森宝
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-08-24
Filing date: 2011-08-24
Publication date: 2013-03-06
Anticipated expiration: 2031-08-24
Also published as: CN102957467B

Abstract

The invention provides a method and a system for processing signals of multiple antennas of a downlink system. The method includes that a base station determines a code word set for cyclic pre-coding according to long channel information of a downlink channel when transmission signals are processed; and the transmission data and demodulation reference signals (DMRS) are subjected to pre-coding according to a cyclic pre-coding mode and the determined code word set for cyclic pre-coding. The method and the system have the advantage that the signal transmission performance can be effectively improved for high-speed user equipment (UE).

Description

The signal processing method of many antennas and system in a kind of downlink system

Technical field

The present invention relates to the signal processing technology of many antennas, refer to especially signal processing method and the system of many antennas in a kind of downlink system.

Background technology

Disposed the Long Term Evolution (LTE of many antennas a base station; Long term evolution) in the system; for low speed user equipment (UE; User Equipment); usually can in code book, select and to base station feedback precoding index (PMI; Precoding Matrix Index), channel quality index (CQI; Channel Quality Index) and order index (RI; Rank Indicator), the precoding that the PMI of base station use feedback is corresponding is as the weights of transmitting antenna.The prerequisite of this mode is: the channel variation that UE feedback PMI uses corresponding precoding to carry out in the signal emission during this period of time to the base station is little, and this is satisfiable to low speed UE.Yet the UE for high-speed mobile, because channel variation is fast, at this moment, the channel the when channel that the PMI that selects during the UE feedback and the CQI that calculates based on PMI are corresponding and base station transmitted signal can not mate, if PMI and the CQI of feedback are continued to use in the base station, then can cause performance loss.Therefore, in this case, usually adopt the method for open loop multi-antenna to improve signal quality.

The basic thought of the method for open loop multi-antenna is: the base station uses one group of precoding as the weights of transmitting antenna circularly, and the data on the running time-frequency resource of distributing to UE are sent.Wherein, running time-frequency resource unit corresponding to each precoding can be the one or more subcarriers in the subframe, can also be Physical Resource Block (PRB, Physical Resource Block), also can be the several continuous physical Resource Block (PRB bundling) that use identical precoding.Its objective is that by a plurality of running time-frequency resource units that distribute to UE such as PRB, a plurality of beam directions that form in precoding send, and make channel present ergodic theorem (Ergodic), thereby reach the effect of diversity.In the transmission mode 3 (TM3, Transmission Mode 3) of LTE the 8th version (R8, Release 8), when RI greater than 2 the time, the precoding of Open-Loop Spatial Multiplexing can be expressed as:

[\begin{matrix} y^{(0)} (i) \\ . \\ . \\ . \\ y^{(p - 1)} (i) \end{matrix}] = W (i) D (i) U [\begin{matrix} x^{(0)} (i) \\ . \\ . \\ . \\ x^{(v - 1)} (i) \end{matrix}]

Wherein, x ^(v)(i) data of the v layer before the precoding on i subcarrier of expression, y ^(p-1)(i) data on p the antenna after the precoding on i subcarrier of expression, U represents the discrete Fourier transform (DFT of dimension υ * υ, Discrete Fourier Transform) matrix, the diagonal matrix of D (i) expression dimension υ * υ, can realize cyclic delay diversity, its k diagonal element is e ^{-j2 π (k-1)/v}, W (i) expression and encoder matrix, W (i)=C _k, k=1 ..., 4, be that to be selected from PMI in the code book be one group of orthogonal pre-coding matrix of 12,13,14,15, and the pass of k and i, v is:

Above-mentioned formula shows, an every v W of sub-carrier transformation (i).

In LTE R10, because the antenna number of base station can be increased to 8 antennas, therefore, 8 new antenna codebooks have been designed.8 antenna codebooks have adopted dicode structure originally, that is: (long-term) PMI component i when a code word has comprised become relatively slowly in time long ₁In short-term (short-term) PMI component i that becomes relatively soon in time ₂The mode of GoB (wave beam lattice, Grid of Beam) has been adopted in the design of 8 antenna codebooks of TE R10, and GoB is combined by one group of 4 dimension DFT vector and two polarised directions.Be 1 code word for the number of plies, i.e. RI=1, an i ₁Corresponding 4 DFT vectors and two 16 beamlet that polarised direction is combined into correspond respectively to 16 i ₂Call number.The code word of other number of plies is chosen on the basis of 1 layer of code word from the corresponding beamlet of the number of plies and is added a phase factor between the different polarised directions, consists of the code book of different layers, and i ₁And i ₂Number have difference for each layer, concrete process can save with reference to 3GPP LTER10 agreement 36.211v10.0.0 6.3.4.2.3.

In addition, in LTE R10, except the public reference signal (CRS that uses at legacy version, Common Reference Signal) outside, also newly introduced downlink demodulation reference signal (DMRS, DeModulation Reference Signal) and channel state information reference signals (CSI-RS, Channel Status Information Reference Signal).Wherein, DMRS can not know realize the demodulation of data channel, and CSI-RS can make UE measure more accurately channel information in the situation of the precoding that use the base station at UE.

In LTE R10, the divided ring space multiplexing technique does not strengthen, and especially newly-increased TM9 mainly designs for closed loop mode.That is to say, in existing Open-Loop Spatial Multiplexing technology, still use 4 fixing orthogonal codes as the precoding that recycles, the base station is not known any channel information of UE fully, although the transmission mode of this complete open loop does not need the feedback information of UE, just can realize the improvement to the signal transmission performance of high speed UE, but, because 8 antenna codebooks are dicode structure originally, therefore, existing Open-Loop Spatial Multiplexing technology can not fully be supported the configuration of 8 transmitting antennas and dicode structure originally, give an example, channel information improves signal transmission performance in the time of can not utilizing long in this of dicode, and, can not utilize well DMRS to strengthen the performance of high speed UE.

Summary of the invention

In view of this, main purpose of the present invention is to provide signal processing method and the system of many antennas in a kind of downlink system, for high speed UE, can effectively improve the performance of signal transmission.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides the processing method that transmits of many antennas in a kind of downlink system, the method comprises:

When processing transmitted, base station channel information during according to down channel long was determined the cyclic prefix codeword set;

According to the mode of cyclic prefix and the cyclic prefix codeword set of determining, transmitting data and DMRS are carried out precoding.

In the such scheme, channel information comprises during described down channel long: PMI component and RI when long.

In the such scheme, described channel information during according to down channel long is determined the cyclic prefix codeword set, for:

The PMI component is selected accordingly in short-term PMI component according to the selection mode that sets in advance during according to length in code book corresponding to the indicated order of RI;

Corresponding in short-term all indicated code words of PMI component of PMI component and selection are defined as the cyclic prefix codeword set during with length.

In the such scheme, when definite cyclic prefix codeword set, the method further comprises:

When the indicated order of RI greater than 4 the time, from code book corresponding to the indicated order of RI, all indicated code words of PMI component were defined as the cyclic prefix codeword set when selection will be grown.

In the such scheme, when transmitting data and DMRS were carried out precoding, the method further comprised:

When the running time-frequency resource granularity of carrying out cyclic prefix is subcarrier, adopt the part component of the pre-encoding codeword in the described cyclic prefix codeword set that DMRS is carried out precoding;

When the running time-frequency resource granularity of carrying out cyclic prefix is PRB, adopt the pre-encoding codeword in the described cyclic prefix codeword set that DMRS is carried out precoding.

In the such scheme, the part component of the pre-encoding codeword in the described cyclic prefix codeword set of described employing carries out precoding to DMRS, for:

When codebook structure is W=W ₁W ₂The time, adopt W ₁DMRS is carried out precoding; Wherein, W ₂Expression is with the component of the code word of sub-carrier variations.

In the such scheme, the method further comprises:

When needs obtain the beam coverage of more wide-angle expansion, base station channel information during according to described down channel long, select adjacent PMI component when long more than, with the adjacent PMI component and according to the selection mode that sets in advance during long in channel information during PMI component, described down channel long when long more than of selecting, corresponding in short-term all the indicated code words of PMI component of PMI component are defined as the cyclic prefix codeword set during determined each length.

In the such scheme, described selection is adjacent PMI component when long more than one, for:

The base station is according to the speed of UE and the correlation of channel, selects adjacent PMI component when long more than in code book; Perhaps,

The base station is according to the selection mode that sets in advance, and selects adjacent PMI component when long more than in code book; Perhaps,

PMI component during PMI component adjacent long during long when UE determines described down channel long in the channel information, and during the described down channel that will determine long during long in the channel information during PMI component adjacent long the PMI component send to the base station; PMI component during adjacent long of PMI component during long during the described down channel that the base station will be received long in the channel information is as adjacent PMI component when long more than of selecting.

In the such scheme, during long during the described described down channel that will determine long in the channel information during PMI component adjacent long the PMI component send to the base station, for:

During long during with the described down channel determined long in the channel information during PMI component adjacent long the PMI component send to the base station by the mode of bitmap mode or the merging mode configuration index that sets in advance number.

In the such scheme, the channel information during according to down channel long in the base station, determine that the method further comprises before the cyclic prefix codeword set:

The channel information when base station obtains described down channel long.

In the such scheme, channel information when described base station obtains described down channel long, for:

UE channel information during to the described down channel of base station feedback long; Perhaps, the base station utilizes the channel heterogeneite, measures up channel, channel information when obtaining described down channel long.

In the such scheme, during channel information, the method further comprises UE during to the described channel of base station feedback long:

UE adopts the Report mode of Closed-Loop Spatial Multiplexing, channel information during to the described channel of base station feedback long; Perhaps, line link control channel (PUCCH physically, Physical Uplink Control CHannel) or physical uplink link traffic channel (PUSCH, Physical Uplink Service CHannel) in, reports PMI component, broadband CQI and RI when long to the base station; When the indicated order of RI greater than 2 the time, further report the differential CQI of the second code word to the base station.

The present invention also provides the method for processing received signal of many antennas in a kind of downlink system, and the method comprises:

When process receiving signal, UE channel information during according to the down channel identical with the base station long is determined the cyclic prefix codeword set;

The mode of the cyclic prefix that adopts according to the base station and the cyclic prefix codeword set of determining are carried out the calculating of CQI and are received the demodulation of signal.

In the such scheme, the channel information during down channel that described foundation is identical with the base station long is determined the cyclic prefix codeword set, for:

According to identical with base station PMI component when long, control (RRC according to the selection mode that sets in advance or by the semi-static configuration selection mode in base station and by the Radio Resource that the base station sends, Radio Resource Control) selection mode known of signaling is selected accordingly in short-term PMI component in code book corresponding to the indicated order of the RI identical with the base station;

In the such scheme, when carrying out the calculating of CQI, the method further comprises:

Frequency resource granularity when also carrying out precoding based on the base station simultaneously utilizes the channel information that measures on CRS and/or CSI-RS and/or the DMRS, calculates CQI.

In the such scheme, receiving the solution timing of signal, the method further comprises:

Pre-encoding codeword in the described cyclic prefix codeword set when using when UE carries out precoding by measuring DMRS, obtaining the base station to DMRS or all or part of equivalent channels information corresponding to component of the pre-encoding codeword in the described cyclic prefix codeword set.

In the such scheme, obtain equivalent channels information corresponding to DMRS after, the method further comprises:

If the equivalent channels information that measures on the DMRS comprises whole equivalent channels information, then with the equivalent channels information that measures on the DMRS, as whole equivalent channels information of demodulation use;

If the equivalent channels information that measures on the DMRS comprises the part equivalent channels information, the mode of the cyclic prefix that then equivalent channels information that measures on the DMRS and base station is adopted and equivalent channels information corresponding to cyclic prefix codeword set of determining merge, whole equivalent channels information that the equivalent channels information after merging is used as demodulation.

In the such scheme, the method further comprises:

When needs obtain the beam coverage of more wide-angle expansion, UE channel information during according to described down channel long, select adjacent PMI component when long more than, adjacent PMI component and corresponding all indicated code words of PMI component in short-term of PMI component during according to definite selected each length of predetermined selection mode during long in the channel information during PMI component, described down channel long when long more than one with selecting are defined as the cyclic prefix codeword set;

Described predetermined selection mode is for: pre-configured selection mode or by the semi-static configuration selection mode in base station and send to the selection mode of UE by the RRC signaling.

The base station is by selected adjacent PMI component when long more than of RRC signaling and/or Downlink Control Information (DCI, Downlink Control Information) indication UE; Perhaps,

UE is according to the selection mode that sets in advance, and selects adjacent PMI component when long more than in code book; Perhaps,

UE is according to the speed of self and the correlation of channel, selects adjacent PMI component when long more than in code book.

In the such scheme, at UE channel information during according to the down channel identical with the base station long, determine that the method further comprises before the cyclic prefix codeword set:

UE is by measuring down channel, channel information when obtaining the described down channel identical with the base station long.

The present invention provides again the transmission signal processing equipment of many antennas in a kind of downlink system, and this device comprises: the first determination module and precoding module; Wherein,

The first determination module is used for when processing transmits, and base station channel information during according to down channel long is determined the cyclic prefix codeword set, and definite cyclic prefix codeword set is sent to precoding module;

Precoding module after being used for receiving the cyclic prefix codeword set of determining of the first determination module transmission, according to the mode of cyclic prefix and the cyclic prefix codeword set of determining, is carried out precoding to transmitting data and DMRS.

In the such scheme, described the first determination module, also be used in the time need to obtaining the beam coverage of more wide-angle expansion, channel information during according to described down channel long, select adjacent PMI component when long more than, with the adjacent PMI component and according to the selection mode that sets in advance during long in channel information during PMI component, described down channel long when long more than of selecting, corresponding in short-term all the indicated code words of PMI component of PMI component are defined as the cyclic prefix codeword set during determined each length.

In the such scheme, this device further comprises the first acquisition module, channel information when being used for obtaining described down channel long, and channel information sends to the first determination module during the described down channel that will obtain long;

Described the first determination module, channel information when also be used for receiving described down channel that the first acquisition module sends long.

The present invention provides again the reception signal processing apparatus of many antennas in a kind of downlink system, and this device comprises: the second determination module, CQI computing module and demodulation module; Wherein,

The second determination module is used for processing when receiving signal, and channel information during according to the down channel identical with the base station long is determined the cyclic prefix codeword set, and definite cyclic prefix codeword set is sent to CQI computing module and demodulation module;

The CQI computing module, be used for receiving the cyclic prefix codeword set of determining that the second determination module sends after, the mode of the cyclic prefix that adopts according to the base station and the cyclic prefix codeword set of determining are carried out the calculating of CQI;

Demodulation module, be used for receiving the cyclic prefix codeword set of determining that the second determination module sends after, the mode of the cyclic prefix that adopts according to the base station and the cyclic prefix codeword set of determining receive the demodulation of signal.

In the such scheme, described the second determination module, when also being used for to obtain the beam coverage of more wide-angle expansion, channel information during according to described down channel long, select adjacent PMI component when long more than, adjacent PMI component and corresponding all indicated code words of PMI component in short-term of PMI component during according to definite selected each length of predetermined selection mode during long in the channel information during PMI component, described down channel long when long more than one with selecting are defined as the cyclic prefix codeword set;

Described predetermined selective rule is for: pre-configured selection mode or by the semi-static configuration selection mode in base station and send to the selection mode of UE by the RRC signaling.

In the such scheme, this device further comprises: the second acquisition module, be used for by measuring down channel, channel information when obtaining the described down channel identical with the base station long, and channel information sends to the second determination module will obtain the described down channel identical with the base station long the time;

Described the second determination module, channel information when also be used for receiving described identical with base station down channel that the second acquisition module sends long.

The present invention also provides the signal processing system of many antennas in a kind of downlink system, and this system comprises: the reception signal processing apparatus of many antennas in the transmission signal processing equipment of many antennas and the downlink system in the downlink system; The transmission signal processing equipment of many antennas further comprises in the downlink system: the first determination module and precoding module; The reception signal processing apparatus of many antennas further comprises in the downlink system: the second determination module, CQI computing module and demodulation module; Wherein,

Precoding module after being used for receiving the cyclic prefix codeword set of determining of the first determination module transmission, according to the mode of cyclic prefix and the cyclic prefix codeword set of determining, is carried out precoding to transmitting data and DMRS;

In the such scheme, described the first determination module, also be used in the time need to obtaining the beam coverage of more wide-angle expansion, channel information during according to described down channel long, select adjacent PMI component when long more than, with the adjacent PMI component and according to the selection mode that sets in advance during long in channel information during PMI component, described down channel long when long more than of selecting, corresponding in short-term all the indicated code words of PMI component of PMI component are defined as the cyclic prefix codeword set during determined each length; And/or,

Described the second determination module, when also being used for to obtain the beam coverage of more wide-angle expansion, channel information during according to described down channel long, select adjacent PMI component when long more than, adjacent PMI component and corresponding all indicated code words of PMI component in short-term of PMI component during according to definite selected each length of predetermined selection mode during long in the channel information during PMI component, described down channel long when long more than one with selecting are defined as the cyclic prefix codeword set;

In the such scheme, the reception signal processing apparatus of many antennas further comprises in the described downlink system: the first acquisition module, channel information when being used for obtaining described down channel long, and channel information sends to the first determination module during the described down channel that will obtain long;

Described the first determination module, channel information when also be used for receiving described down channel that the first acquisition module sends long; And/or,

The reception signal processing apparatus of many antennas further comprises in the described downlink system: the second acquisition module, be used for by measuring down channel, channel information when obtaining the described down channel identical with the base station long, and channel information sends to the second determination module will obtain the described down channel identical with the base station long the time;

The signal processing method of many antennas and system in the downlink system provided by the invention, when processing transmitted, base station channel information during according to down channel long was determined the cyclic prefix codeword set; According to the mode of cyclic prefix and the cyclic prefix codeword set of determining, transmitting data and DMRS are carried out precoding; When process receiving signal, UE channel information during according to the down channel identical with the base station long is determined the cyclic prefix codeword set; The mode of the cyclic prefix that adopts according to the base station and the cyclic prefix codeword set of determining are carried out the calculating of CQI and are received the demodulation of signal, so, for high speed UE, can effectively improve the performance of signal transmission.

In addition, when needs obtain the beam coverage of the expansion of wide-angle more, channel information during according to down channel long, selection is adjacent PMI component i when long more than one ₁, with adjacent PMI component i when long more than that selects ₁And each adjacent PMI component i when long ₁Corresponding in short-term PMI component i ₂All indicated code words are defined as the cyclic prefix codeword set, so, can further improve the performance of signal transmission.

In addition, the equivalent channels information that will measure from DMRS, the part equivalent channels information of using as demodulation or whole equivalent channels information so, can improve the performance of demodulation effectively.

Description of drawings

Fig. 1 is the method flow schematic diagram that transmits and process of many antennas in the downlink system of the present invention;

Fig. 2 is the method flow schematic diagram that the reception signal of many antennas in the downlink system of the present invention is processed;

Fig. 3 is the method schematic diagram that the signal of many antennas in the downlink system provided by the invention is processed;

Fig. 4 is the mode schematic diagram of cyclic prefix among the embodiment one;

Fig. 5 be among the embodiment one antenna to the mapping mode schematic diagram of DMRS;

Fig. 6 is the structural representation of the subpattern of R10 feedback model 1-1 among the embodiment four;

Fig. 7 is the apparatus structure schematic diagram that transmits and process of many antennas in the downlink system of the present invention;

Fig. 8 is the apparatus structure schematic diagram that the reception signal of many antennas in the downlink system of the present invention is processed.

Embodiment

The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.

Basic thought of the present invention is: when processing transmitted, base station channel information during according to down channel long was determined the cyclic prefix codeword set; According to the mode of cyclic prefix and the cyclic prefix codeword set of determining, transmitting data and DMRS are carried out precoding; When process receiving signal, UE channel information during according to the down channel identical with the base station long is determined the cyclic prefix codeword set; The mode of the cyclic prefix that adopts according to the base station and the cyclic prefix codeword set of determining are carried out the calculating of CQI and are received the demodulation of signal.

The processing method that transmits of many antennas in the downlink system of the present invention as shown in Figure 1, may further comprise the steps:

Step 101: when processing transmitted, base station channel information during according to down channel long was determined the cyclic prefix codeword set;

Here, described down channel refers to: the base station sends the employed channel of data to UE; Channel information comprises during described down channel long: PMI component i when long ₁And RI.

Described channel information during according to down channel long is determined the cyclic prefix codeword set, is specially:

PMI component i during according to length ₁, in code book corresponding to the indicated order of RI, select accordingly in short-term PMI component i according to the selection mode that sets in advance ₂

PMI component i in the time of will growing ₁And the accordingly PMI component i in short-term that selects ₂All indicated code words are defined as the cyclic prefix codeword set;

Wherein, in code book corresponding to the indicated order of RI, select accordingly in short-term PMI component i ₂The time, selected accordingly PMI component i in short-term ₂Can be the whole in short-term PMI component i in the code book ₂, also can be the part PMI component i in short-term in the code book ₂Here, can determine to select all in short-term PMI component i according to needs ₂, or select in short-term PMI component i of part ₂, particularly, the quality that can transmit according to the signal that needs reach determines to select all in short-term PMI component i by emulation experiment ₂, or select in short-term PMI component i of part ₂, and selection mode is configured on the base station, the selection mode of configuration specifically can be: certain the several in short-term PMI component i in the fixing use code book ₂, perhaps, can be: at set intervals, be transformed into and use other fixing several in short-term PMI component i ₂, the selection mode of this configuration can be called the selection mode of semi-static configuration; Wherein, the concrete processing procedure of selecting by emulation experiment is those skilled in the art's conventional techniques means, repeats no more here.

When definite cyclic prefix codeword set, the method can further include:

When the indicated order of RI greater than 4 the time, from code book corresponding to the indicated order of RI, PMI component i when selection will be grown ₁All indicated code words are defined as the cyclic prefix codeword set; Wherein, the indicated order of described RI that is to say that greater than 4 the indicated order of RI is 5,6,7,8, at this moment, owing to do not comprise in short-term PMI component i in 8 antenna codebooks of LTE R10 ₂, therefore, PMI component i when selection will be grown ₁All indicated code words are defined as the cyclic prefix codeword set.

Before this step, the method can further include:

The channel information when base station obtains described down channel long;

Channel information when particularly, UE is to the described down channel of base station feedback long; Perhaps, the base station utilizes the channel heterogeneite, measures up channel, channel information when obtaining described down channel long; Wherein, UE can be by measuring down channel, channel information when obtaining described down channel long; When descending system was time division duplex (TDD, Time Division Duplexing) system, the base station can utilize the channel heterogeneite, measured up channel, channel information when obtaining described down channel long; The concrete processing procedure of channel information can adopt prior art when here, UE obtained described down channel long; The concrete processing procedure of channel information was prior art when the base station obtained described down channel long, repeated no more here.

During channel information, the method can further include UE during to the described channel of base station feedback long:

UE adopts the transmission mode of Closed-Loop Spatial Multiplexing, channel information during to the described channel of base station feedback long; Perhaps, increase a kind of new Report Type in the cycle Report mode, particularly, in a PUCCH or PUSCH, report PMI component i when long ₁, broadband CQI and RI; When the indicated order of RI greater than 2 the time, further report the differential CQI of the second code word; The concrete processing procedure of the transmission mode of the Closed-Loop Spatial Multiplexing that wherein, defines among the concrete processing procedure of the transmission mode of described Closed-Loop Spatial Multiplexing and the LTE R10 is identical.Effect and the prior art of CQI are identical, and how to use the process of CQI be not the content that the present invention is concerned about in the base station.

Step 102: according to the mode of cyclic prefix and the cyclic prefix codeword set of determining, transmitting data and DMRS are carried out precoding;

Here, when transmitting data was carried out precoding, the base station used precoding WD (i) U that the data on the subcarrier i are carried out precoding, wherein, the diagonal matrix of D (i) expression dimension υ * υ, k the diagonal element of D (i) is e ^{-j2 π (k-1)/v}, U represents the DFT matrix of dimension υ * υ, and v represents the number of plies of RI indication, and W represents that dimension is N _TThe pre-coding matrix of * v, N _TThe number of transmit antennas of expression base station, every v subcarrier or each PRB or W of a plurality of PRB conversion; Here, concrete processing procedure is prior art, repeats no more here.

When transmitting data and DMRS were carried out precoding, the method can further include:

The base station adopts pre-encoding codeword in the described cyclic prefix codeword set or the component of the pre-encoding codeword in the described cyclic prefix codeword set that DMRS is carried out precoding; Wherein, when the running time-frequency resource granularity of carrying out cyclic prefix is subcarrier, adopt the part component of the pre-encoding codeword in the described cyclic prefix codeword set that DMRS is carried out precoding, when the running time-frequency resource granularity of carrying out cyclic prefix is PRB, adopt the pre-encoding codeword in the described cyclic prefix codeword set that DMRS is carried out precoding;

Wherein, the part component of the pre-encoding codeword in the described cyclic prefix codeword set of described employing carries out precoding to DMRS, is specially:

When determining the mode of cyclic prefix, can according to resource quantity and the DMRS precoding mode of the cyclic prefix codeword set of determining, the running time-frequency resource granularity of carrying out cyclic prefix, distribution, determine the mode of cyclic prefix;

Wherein, dispose in advance the resource quantity of running time-frequency resource granularity and distribution in the base station; Resource quantity and the DMRS precoding mode of the corresponding cyclic prefix codeword set that described basis is determined, the running time-frequency resource granularity of carrying out cyclic prefix, distribution, the concrete processing procedure of determining the mode of cyclic prefix is those skilled in the art's conventional techniques means, repeats no more here.When practical application, determine that the concrete processing procedure of the mode of cyclic prefix can adopt predefined mode, that is: the mode of cyclic prefix is determined according to the mode of pre-configured cyclic prefix in the base station.

The method can further include:

When needs obtain the beam coverage of the expansion of wide-angle more, base station channel information during according to described down channel long, selection is adjacent PMI component i when long more than one ₁, with adjacent PMI component i when long more than that selects ₁, described down channel long the time PMIi during long in the channel information ₁Component and according to the selection mode that sets in advance, determined each PMI component i when long ₁Corresponding PMI component i in short-term ₂All indicated code words are defined as the cyclic prefix codeword set;

Wherein, described selection adjacent PMI component i when long more than ₁, be specially:

The base station is according to the speed of UE and the correlation of channel, selects adjacent PMI component i when long more than in code book ₁Perhaps,

The base station is according to the selection mode that sets in advance, and selects adjacent PMI component i when long more than in code book ₁Perhaps,

PMI component i during long when UE determines described down channel long in the channel information ₁Adjacent long the time PMI component i ₁, and PMI component i during long in channel information during the described down channel that will determine long ₁Adjacent long the time PMI component i ₁Send to the base station; PMI component i during long during the described down channel that the base station will be received long in the channel information ₁Adjacent long the time PMI component i ₁, as adjacent PMI component i when long more than that selects ₁

Wherein, PMI component i during long in channel information during the described described down channel that will determine long ₁Adjacent long the time PMI component i ₁Send to the base station, be specially:

PMI component i during long during with the described down channel determined long in the channel information ₁Adjacent long the time PMI component i ₁Mode by bitmap mode or the merging mode configuration index that sets in advance number sends to the base station; PMI component i during long when the described down channel of determining that UE sends long can be known by bitmap mode or described call number in the base station in the channel information ₁Adjacent long the time PMI component i ₁Here, by the bitmap mode, PMI component i during long during the described down channel of send determining to the base station long in the channel information ₁Adjacent long the time PMI component i ₁Concrete processing procedure can adopt prior art.

When selection mode is set, need to consider the speed of UE and the correlation of channel, same, PMI component i during long when UE determines described down channel long in the channel information ₁Adjacent long the time PMI component i ₁The time, needing to consider the speed of UE and the correlation of channel, concrete processing procedure is those skilled in the art's conventional techniques means.PMI component i when length can be passed through in the base station ₁The frequency of upgrading is determined the speed of UE.

The base station determines to obtain more that the concrete processing procedure on the opportunity of the beam coverage of wide-angle expansion is prior art, repeats no more here.

The method for processing received signal of many antennas in the downlink system of the present invention as shown in Figure 2, may further comprise the steps:

Step 201: when process receiving signal, UE channel information during according to the down channel identical with the base station long is determined the cyclic prefix codeword set;

Here, channel information comprises during described down channel long: PMI component i when long ₁And RI.

The channel information during down channel that described foundation is identical with the base station long is determined the cyclic prefix codeword set, is specially:

According to identical with base station PMI component i when long ₁, according to predetermined selection mode, in code book corresponding to the indicated order of the RI identical with the base station, select accordingly in short-term PMI component i ₂

Wherein, described predetermined selection mode is specially: pre-configured selection mode or sent to the selection mode of UE by the semi-static configuration selection mode in base station and RRC signaling.

In code book corresponding to the indicated order of RI, select corresponding in short-term PMI component i ₂The time, the in short-term PMI component i of selected correspondence ₂Can be the whole in short-term PMI component i in the code book ₂, also can be the part PMI component i in short-term in the code book ₂Here, can determine to select all in short-term PMI component i according to needs ₂, or select in short-term PMI component i of part ₂, particularly, the quality that can transmit according to the signal that needs reach determines to select all in short-term PMI component i by emulation experiment ₂, or select in short-term PMI component i of part ₂, and with on the selection mode configuration UE, wherein, the selection mode that disposes on the selection mode of the upper configuration of UE and the base station is identical; The concrete processing procedure of selecting by emulation experiment is those skilled in the art's conventional techniques means, repeats no more here.For sending to the selection mode of UE by the semi-static configuration selection mode in base station and by the RRC signaling, particularly, the base station is transformed into and uses and the last different several in short-term PMI component i that fix at set intervals ₂, and passing through the RRC signaling to UE, UE determines selection mode accordingly; Here, need to prove: the cyclic prefix codeword set that the cyclic prefix codeword set that UE determines and base station are determined is identical.

When definite cyclic prefix codeword set, the method can further include:

Before this step, the method can further include:

UE is by measuring down channel, channel information when obtaining the described down channel identical with the base station long; Wherein, concrete processing procedure can adopt prior art.

Step 202: the mode of the cyclic prefix that adopts according to the base station and the cyclic prefix codeword set of determining, carry out the calculating of CQI and receive the demodulation of signal;

Here, UE has been known the mode of the cyclic prefix that adopt the base station in advance, such as, adopt predefined mode, know the mode of the cyclic prefix that adopt the base station, that is: UE is known the mode of the cyclic prefix that adopt the base station according to the mode of pre-configured cyclic prefix.

When carrying out the calculating of CQI, frequency resource granularity when UE can also carry out precoding based on the base station simultaneously utilizes the channel information that measures on CRS and/or CSI-RS and/or the DMRS, calculates CQI, wherein, the concrete processing procedure of calculating CQI can adopt prior art.

Receiving the solution timing of signal, the method can further include:

Pre-encoding codeword in the described cyclic prefix codeword set when using when UE carries out precoding by measuring DMRS, obtaining the base station to DMRS or all or part of equivalent channels information corresponding to component of the pre-encoding codeword in the described cyclic prefix codeword set;

Wherein, if the codebook structure that adopts when precoding is carried out to DMRS in the base station is W=W ₁W ₂, the equivalent channels information that then measures on the DMRS is: HW ₁Wherein, W ₂In the expression LTE R108 antenna codebook with the component of the code word of sub-carrier variations, W ₁The part component of the pre-encoding codeword that adopt when DMRS is carried out precoding the expression base station, H represent the channel matrix between the antenna of the antenna of base station and UE, here, and W ₁Specifically can be to be N _T* N _TThe unit matrix I of dimension, N _TThe number of transmit antennas of expression base station.

After obtaining equivalent channels information corresponding to DMRS, the method can further include:

If the equivalent channels information that measures on the DMRS comprises the part equivalent channels information, the mode of the cyclic prefix that then equivalent channels information that measures on the DMRS and base station is adopted and equivalent channels information corresponding to cyclic prefix codeword set of determining merge, whole equivalent channels information that the equivalent channels information after merging is used as demodulation; Here, the concrete processing procedure of determining the equivalent channels information that the mode of the cyclic prefix that adopt described base station and the cyclic prefix codeword set of determining are corresponding can adopt prior art, and the method for the equivalent channels information that the mode of the cyclic prefix that adopt UE acquisition base station and the cyclic prefix codeword set of determining are corresponding can be called the method that implicit expression obtains equivalent channels information.

The method can further include:

When needs obtain the beam coverage of the expansion of wide-angle more, UE channel information during according to described down channel long, selection is adjacent PMI component i when long more than one ₁, with adjacent PMI component i when long more than that selects ₁, described down channel long the time PMI component i during long in the channel information ₁, and selected each PMI component i when long of determining according to predetermined selection mode ₁Corresponding PMI component i in short-term ₂All indicated code words are defined as the cyclic prefix codeword set;

The base station is by the selection of RRC signaling and/or DCI indication UE cyclic prefix code word and the mode of cyclic prefix, and UE is according to the selection of the cyclic prefix of receiving, selects adjacent PMI component i when long more than ₁Perhaps,

UE is according to the selection mode that sets in advance, and selects adjacent PMI component i when long more than in code book ₁Perhaps,

UE is according to the speed of self and the correlation of channel, selects adjacent PMI component i when long more than in code book ₁

Wherein, when practical application, which kind of mode UE and base station have determined in advance to adopt select adjacent PMI component i when long more than ₁, no matter adopt which kind of mode, selected adjacent PMI component i when long more than in UE and base station ₁Identical, to give an example, the selection mode that sets in advance can be adopted in UE and base station, selects adjacent PMI component i when long more than ₁, at this moment, the selection mode that UE and base station set in advance is identical; PMI component i when UE can pass through length ₁The frequency of upgrading is determined the speed of self.

The signal processing method of many antennas in the downlink system provided by the invention, as shown in Figure 3, when processing transmitting, after transmitting data shines upon through layer, corresponding to the vector [x of different layers formation ⁽⁰⁾(i) ... x ^(υ-1)(i)] ^TThe data premultiplication DFT matrix U of different layers transforms to frequency domain, premultiplication is with the diagonal matrix D (i) of subcarrier number i conversion again for the frequency domain data that obtains, and the mode by frequency domain phase deviation realizes the systemic circulation delay diversity, afterwards with the data that obtain premultiplication pre-coding matrix W (i successively again _v) and take advantage of pre-coding matrix W (i _RB), carry out the transmission of many antennas; Wherein, W (i _v) and W (i _RB) different with the mode of different code books and precoding.DMRS is by premultiplication pre-coding matrix W (i _RB) rear in corresponding DMRS port transmission.

Accordingly, when processing to received signal, UE at first by measuring DMRS, obtains the equivalent channels information H of reference channel position _rW (i _RB), the process interpolation obtains the equivalent channels information HW (i of Data Position _RB), determine precoding component W (i by cyclic prefix mode and the circulation codeword set that adopt the base station _v) D (i) U, afterwards with HW (i _RB) the equivalent channels information HW (i of generated data Resource Unit (RE, Resource Element) position _RB) W (i _v) D (i) U, utilize the equivalent channels information that obtains, to receive data H[y ⁽⁰⁾Y ^(P)] ^TCarry out demodulation and obtain demodulating data [x ⁽⁰⁾X ^(v)] ^T

Here, need to prove: the signal processing method of many antennas is the semi-loop space multiplexing technique in the downlink system provided by the invention.

Below in conjunction with embodiment the present invention is described in further detail again.

Embodiment one

The application scenarios of present embodiment is: the running time-frequency resource granularity of cyclic prefix is subcarrier, code book is 8 antenna codebooks of LTER10, the pre-coding matrix of DMRS is unit matrix, the signal processing method of many antennas in the downlink system of present embodiment, as shown in Figure 3, the order of channel is 2, and then corresponding R10 code book is as shown in table 1:

Table 1

Wherein,

The expression phase factor, v _m=[1 e ^{J2 π m/32}e ^{J4 π m/32}e ^{J6 π m/32}] ^TExpression DFT vector.

Accordingly, in the present embodiment,

U = \frac{1}{\sqrt{2}} [\begin{matrix} 1 & 1 \\ 1 & e^{- j 2 π / 2} \end{matrix}],

D (i) = [\begin{matrix} 1 & 0 \\ 0 & e^{- j 2 πi / 2} \end{matrix}],

W (i_{v}) = W_{m, m^{'}, n}^{(2)},

And W (i _v) per 2 sub-carrier transformations once; Simultaneously, in the present embodiment, select i ₂=0,1,2,3 code word is as the i of code word in the circulation codeword set ₂Component.At first, UE is by CRS or CIS-RS or DMRS measurement channel matrix H; Afterwards, the different i of traversal ₁Value is each i ₁Code word computing formula in the value substitution table 1 is in conjunction with selected i ₂Calculate each i ₁Corresponding circulation codeword set

Based on each i ₁Corresponding codeword set and the channel matrix H of predefined cyclic prefix mode and measurement are calculated Signal to Interference plus Noise Ratio, select the i corresponding to codeword set of Signal to Interference plus Noise Ratio maximum ₁And the corresponding CQI of data throughout maximum that makes reports to the base station.The mode that reports can be continued to use any feedback model of supporting under the transmission mode of the single residential quarter of R10 Closed-Loop Spatial Multiplexing.Base station side is according to the i that reports ₁Can determine the codeword set that circulates And use circularly these code words that the data on the subcarrier are carried out precoding.In the present embodiment, the mode of cyclic prefix is chosen as: use successively i ₂Code word in the set of=0,1,2,3 correspondences is carried out precoding, that is: i from set ₂=0 code word begins, to the sequentially number identical precoding of per from low to high two subcarriers use of the subcarrier in institute's distributes resource blocks (RB, Resource Bulk), and mode schematic diagram such as Fig. 4 of the cyclic prefix of two RB, in Fig. 4, I is adopted in expression ₂Code word in the set of=0 correspondence is carried out precoding,

I is adopted in expression ₂Code word in the set of=1 correspondence is carried out precoding,

I is adopted in expression ₂Code word in the set of=2 correspondences is carried out precoding,

I is adopted in expression ₂Code word in the set of=3 correspondences is carried out precoding, and represents Physical Downlink Control Channel (PDCCH, physical downlink control channel) signal,

Expression DMRS; The identical patterns representative has identical W (i _v).Applying unit matrix W (i _RB) as the pre-coding matrix of DMRS, then 8 antennas just need to take 8 DMRS ports, consider lower two time slots of high speed channel variation obviously and the measurement of being convenient to the equipolarization antenna channel, therefore, can adopt antenna shown in Figure 5 to the mapping mode of DMRS, that is: the equipolarization antenna mapping is to the RE position of the most contiguous DMRS, in Fig. 5

Represent a polarised direction,

Represent another polarised direction.

Based on the mapping mode among Fig. 5, UE can measure and obtain two different polarised direction multi-antenna channels by interpolation, thus synthetic 8 transmitting antenna channel matrix H.After UE obtains channel matrix H by DMRS or CRS, use the code word in the cyclic prefix codeword set to consist of W (i _v) D (i) U, according to the agreement of as shown in Figure 4 cyclic prefix mode, wherein, the identical patterns representative has identical W (i _v), in conjunction with channel matrix H, consist of equivalent channels information HW (i _v) D (i) U, and with the data of each RE position of this demodulation.

Embodiment two

Different from embodiment one is: the application scenarios of present embodiment is: need to obtain the more beam coverage of wide-angle expansion, at this moment, PMI component i during long when UE determines described down channel long in the channel information ₁Adjacent long the time PMI component i ₁, and PMI component i during long in channel information during the described down channel that will determine long ₁Adjacent long the time PMI component i ₁Send to the base station, be specially: the i shown in the his-and-hers watches 1 in the code book ₁Component merges, thereby obtains larger beam scanning angle spread.In the present embodiment, UE is to per 4 i ₁Merge, and obtain a sequence number i ' after the merging ₁And report i ' then to the base station ₁The bit number of correspondence be 2; The call number i ' that then reports ₁With i in the code book ₁The corresponding relation of call number is as shown in table 2:

Table 2

i′ ₁	I in the corresponding code book ₁
		00	0、1、2、3
01	4、5、6、7
		10	8、9、10、11
11	12、13、14、15

Wherein, for example, when UE is fed back to i ' ₁=00 o'clock, PMI component i when long should be chosen in the base station ₁Call number be 0,1,2,3 and PMI component i in short-term ₂=0,1 indicated code word consists of the circulation codeword set.

Except above-mentioned merging i ₁Method outside, the another kind of i that merges ₁Method be: UE measures and also to report i ₁But not i ' ₁, for example, measure the i that obtains and report as UE ₁Value is 2, then chooses i ₁=1 and i ₁=3 merge, and choose i in the code book that is: ₁=1,2,3, i ₂=0,1 indicated code word consists of the circulation codeword set.

Embodiment three

Different from embodiment one is that the application scenarios of present embodiment is: the running time-frequency resource granularity of cyclic prefix is RB, and code book is 8 antenna codebooks of LTE R10, and the pre-coding matrix of DMRS is PMI component i when long ₁PMI component i in short-term ₂The code word of indication; The cyclic prefix codeword set is selected: PMI component i during UE feedback long ₁And i ₁Corresponding in short-term PMI component i ₂=8 ..., 15 indicated code words; UE directly uses the equivalent channels information H that measures on the channel that sends DMRS _rW (i ₁, i ₂) interpolation obtains the equivalent channels information HW (i of data RE ₁, i ₂).

Under this condition, there are two kinds of situations, UE can know mode and the cyclic prefix codeword set of the cyclic prefix of base station, also can not know mode and the cyclic prefix codeword set of the cyclic prefix of base station.When UE does not know the mode of cyclic prefix and cyclic prefix codeword set, calculate CQI in the mode among the LTE R10, that is: use PMI component i when long ₁PMI component i in short-term ₂Instantaneous code word W (the i of appointment ₁, i ₂), the broadband CQI that calculates, and/or subband CQI.And when UE knew the mode of cyclic prefix of base station and cyclic prefix codeword set, UE calculated the CQI under the precoding mode of this cyclic prefix.Latter event can obtain the CQI that precoding more mated than the previous case, thereby, can obtain better signal transmission performance.

Embodiment four

In embodiment two, three, PMI component i when long ₁Feedback adopt any feedback model of supporting under the transmission mode of single residential quarter Closed-Loop Spatial Multiplexing, although i.e.: operation parameter i not ₂, but still feed back by the feedback model among the R10, and in the present embodiment, the assumption period feedback model is 1-1, that is: feedback broadband P MI and broadband CQI.The subpattern 2 of R10 periodic feedback pattern 1-1 has comprised two kinds of Report Types in this pattern, a kind of is RI, only reports RI in the sub-frame of uplink of place that is:, and another kind is broadband CQI, the PMIi when broadband is long ₁And broadband PMIi in short-term ₂, that is: PMIi when reporting broadband CQI, broadband length in the sub-frame of uplink of place ₁And broadband PMIi in short-term ₂Three kinds of information.Under this pattern, each parameter of feeding back in ascending control information (UCI, Uplink Control Informatica) territory and the bit number that takies thereof are as shown in table 3:

Table 3

As can be seen from Table 3, be no more than the restriction of 11 bits in order to satisfy a subframe Report Body, broadband CQI is 4 bits, and the differential CQI bit of order (Rank)＞1 o'clock is 3, and remaining bit can only allow i ₁And i ₂All carry out down-sampling, like this, reduced resolution.For only needing feedback i ₁Semi-loop multiple-input and multiple-output (MIMO, Multiple-Input Multiple-Out-put) mode, that is: technical scheme provided by the invention is if directly utilize existing feedback system, i ₂Be equivalent to otiose information, but can make i ₁Bit number reduce.At this moment, if remove otiose i ₂, Rank=1,2 o'clock i ₁Bit number can return to 4 bits, Rank=3,4i ₁Bit number can return to 2 bits, thereby increased i ₁Feedback accuracy, and then promoted the performance of signal transmission.Therefore, the feedback system that present embodiment provides has been equivalent to increase a new periodic feedback Report Type for the semi-loop transmission mode, as shown in Figure 6, that is: reports simultaneously 4 bit broadband PMI component i in a sub-frame of uplink ₁, 4 bit broadband CQI, when the indicated order of RI greater than 2 the time, further report 3 bit differential CQI of the second code word.Wherein, broadband P MI component i ₁Also can be 3 bits, 2 bits or 1 bit, concrete bit number can according to concrete scene, pass through the RRC signal deployment by the base station, or fixed configurations be certain bit number.

Embodiment five

In the present embodiment, be different from embodiment one, two and three be: choosing of cyclic prefix code word do not rely on any PMI information, supposes RI=2, for 2 layers of code book in the table 1, chooses codeword set { W (i ₁, i ₂), wherein, choose i ₁={ 0,4,8,12} and i ₂={ code word of 0,1,2,3,4,5,6,7} indication is as the cyclic prefix codeword set.The mode of cyclic prefix can be by i ₁=0 beginning, for example, using the order of cyclic prefix code word can be W (0,0) ..., W (0,7), W (4,0) ..., W (4,7) ..., W (12,0) ..., W (12,7).

Embodiment six

In the present embodiment, RI=5, then corresponding code book is as shown in table 4,

Table 4

As can be seen from Table 4, because therefore RI=5, only has parameter i ₁And there is not i ₂, therefore, only use i ₁={ indicated 4 code words of 0,1,2,3} are as the cyclic prefix codeword set, and adopt i ₁={ indicated 4 code words of 0,1,2,3} are carried out precoding as the code word in the cyclic prefix codeword set to DMRS and data.

For realizing the processing method that transmits of many antennas in the above-mentioned downlink system, the present invention also provides the transmission signal processing equipment of many antennas in a kind of downlink system, and as shown in Figure 7, this device comprises: the first determination module 71 and precoding module 72; Wherein,

The first determination module 71 is used for when processing transmits, and base station channel information during according to down channel long is determined the cyclic prefix codeword set, and definite cyclic prefix codeword set is sent to precoding module 72;

Precoding module 72 after being used for receiving the cyclic prefix codeword set of determining of the first determination module 71 transmissions, according to the mode of cyclic prefix and the cyclic prefix codeword set of determining, is carried out precoding to transmitting data and DMRS.

Wherein, this device can further include the first acquisition module, channel information when being used for obtaining described down channel long, and channel information sends to the first determination module 71 during the described down channel that will obtain long;

Described the first determination module 71, channel information when also be used for receiving described down channel that the first acquisition module sends long.

Described the first determination module 71 also is used in the time need to obtaining the beam coverage of more wide-angle expansion, channel information during according to described down channel long, and selection is adjacent PMI component i when long more than one ₁, with adjacent PMI component i when long more than that selects ₁, described down channel long the time PMI component i during long in the channel information ₁, and according to the selection mode that sets in advance, determined each PMI component i when long ₁Corresponding PMI component i in short-term ₂All indicated code words are defined as the cyclic prefix codeword set.

Here, need to prove: the modules in the described downlink system of the present invention in the transmission signal processing equipment of many antennas is the logic module of base station; The concrete processing procedure of the first determination module in the described downlink system of the present invention in the transmission signal processing equipment of many antennas, precoding module and the first acquisition module describes in detail hereinbefore, repeats no more.

For realizing the method for processing received signal of many antennas in the above-mentioned downlink system, the present invention also provides the reception signal processing apparatus of many antennas in a kind of downlink system, as shown in Figure 8, this device comprises: the second determination module 81, CQI computing module 82 and demodulation module 83; Wherein,

The second determination module 81 is used for processing when receiving signal, and channel information during according to the down channel identical with the base station long is determined the cyclic prefix codeword set, and definite cyclic prefix codeword set is sent to CQI computing module 82 and demodulation module 83;

CQI computing module 82, be used for receiving the cyclic prefix codeword set of determining that the second determination module 81 sends after, the mode of the cyclic prefix that adopts according to the base station and the cyclic prefix codeword set of determining are carried out the calculating of CQI;

Demodulation module 83, be used for receiving the cyclic prefix codeword set of determining that the second determination module 81 sends after, the mode of the cyclic prefix that adopts according to the base station and the cyclic prefix codeword set of determining receive the demodulation of signal.

Wherein, this device can further include: the second acquisition module, be used for by measuring down channel, channel information when obtaining the described down channel identical with the base station long, and channel information sends to the second determination module 81 will obtain the described down channel identical with the base station long the time;

Described the second determination module 81, channel information when also be used for receiving described identical with base station down channel that the second acquisition module sends long.

Described the second determination module 81, when also being used for obtaining the beam coverage of more wide-angle expansion, channel information during according to described down channel long, selection is adjacent PMI component i when long more than one ₁, with adjacent PMI component i when long more than that selects ₁, described down channel long the time PMI component i during long in the channel information ₁, and selected each PMI component i when long of determining according to predetermined selection mode ₁Corresponding PMI component i in short-term ₂All indicated code words are defined as the cyclic prefix codeword set; Described predetermined selective rule is for: pre-configured selection mode or by the semi-static configuration selection mode in base station and send to the selection mode of UE by the RRC signaling.

Here, need to prove: the modules in the described downlink system of the present invention in the reception signal processing apparatus of many antennas is the logic module of UE; The second determination module in the described downlink system of the present invention in the transmission signal processing equipment of many antennas and the concrete processing procedure of demodulation module describe in detail hereinbefore, repeat no more.

Reception signal processing apparatus based on many antennas in the transmission signal processing equipment of many antennas in the above-mentioned downlink system and the downlink system, the present invention also provides the signal processing system of many antennas in a kind of downlink system, and this system comprises: the reception signal processing apparatus of many antennas in the transmission signal processing equipment of many antennas and the downlink system in the downlink system; The transmission signal processing equipment of many antennas further comprises in the downlink system: the first determination module and precoding module; The reception signal processing apparatus of many antennas further comprises in the downlink system: the second determination module, CQI computing module and demodulation module; Wherein,

The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.

Claims

1. the processing method that transmits of many antennas in the downlink system is characterized in that the method comprises:

According to the mode of cyclic prefix and the cyclic prefix codeword set of determining, transmitting data and demodulated reference signal (DMRS) are carried out precoding.

2. method according to claim 1 is characterized in that, channel information comprises during described down channel long: precoding index (PMI) component and order index (RI) when long.

3. according to right 2 described methods, it is characterized in that described channel information during according to down channel long is determined the cyclic prefix codeword set, for:

4. method according to claim 3 is characterized in that, when definite cyclic prefix codeword set, the method further comprises:

5. method according to claim 1 is characterized in that, when transmitting data and DMRS were carried out precoding, the method further comprised:

6. method according to claim 5 is characterized in that, the part component of the pre-encoding codeword in the described cyclic prefix codeword set of described employing carries out precoding to DMRS, for:

7. method according to claim 1 is characterized in that, the method further comprises:

8. method according to claim 7 is characterized in that, described selection is adjacent PMI component when long more than one, for:

The speed of base station User equipment (UE) and the correlation of channel are selected adjacent PMI component when long more than in code book; Perhaps,

9. method according to claim 8 is characterized in that, during long during the described described down channel that will determine long in the channel information during PMI component adjacent long the PMI component send to the base station, for:

10. according to claim 1 to 9 each described methods, it is characterized in that the channel information during according to down channel long in the base station determines that the method further comprises before the cyclic prefix codeword set:

The channel information when base station obtains described down channel long.

11. method according to claim 10 is characterized in that, channel information when described base station obtains described down channel long, for:

12. method according to claim 11 is characterized in that, during channel information, the method further comprises UE during to the described channel of base station feedback long:

UE adopts the Report mode of Closed-Loop Spatial Multiplexing, channel information during to the described channel of base station feedback long; Perhaps, physically in line link control channel (PUCCH) or the physical uplink link traffic channel (PUSCH), report PMI component, broad-band channel quality index (CQI) and RI when long to the base station; When the indicated order of RI greater than 2 the time, further report the differential CQI of the second code word to the base station.

13. the method for processing received signal of many antennas in the downlink system is characterized in that the method comprises:

14. method according to claim 13 is characterized in that, channel information comprises during described down channel long: PMI component and RI when long.

15. method according to claim 14 is characterized in that, the channel information during down channel that described foundation is identical with the base station long is determined the cyclic prefix codeword set, for:

According to identical with base station PMI component when long, control the selection mode that (RRC) signaling is known according to the selection mode that sets in advance or by the semi-static configuration selection mode in base station and by the Radio Resource that the base station sends, in code book corresponding to the indicated order of the RI identical with the base station, select accordingly in short-term PMI component;

16. method according to claim 15 is characterized in that, when definite cyclic prefix codeword set, the method further comprises:

17. method according to claim 13 is characterized in that, when carrying out the calculating of CQI, the method further comprises:

Frequency resource granularity when also carrying out precoding based on the base station simultaneously utilizes the channel information that measures on public reference signal (CRS) and/or channel state information reference signals (CSI-RS) and/or the DMRS, calculates CQI.

18. method according to claim 13 is characterized in that, is receiving the solution timing of signal, the method further comprises:

19. method according to claim 18 is characterized in that, obtain equivalent channels information corresponding to DMRS after, the method further comprises:

20. method according to claim 13 is characterized in that, the method further comprises:

21. method according to claim 20 is characterized in that, described selection is adjacent PMI component when long more than one, for:

The base station is by selected adjacent PMI component when long more than of RRC signaling and/or Downlink Control Information (DCI) indication UE; Perhaps,

22. to 21 each described methods, it is characterized in that according to claim 13, at UE channel information during according to the down channel identical with the base station long, determine that the method further comprises before the cyclic prefix codeword set:

23. the transmission signal processing equipment of many antennas is characterized in that this device comprises: the first determination module and precoding module in the downlink system; Wherein,

24. device according to claim 23, it is characterized in that, described the first determination module, also be used in the time need to obtaining the beam coverage of more wide-angle expansion, channel information during according to described down channel long, select adjacent PMI component when long more than, with adjacent PMI component when long more than of selecting, PMI component during long during described down channel long in the channel information, and according to the selection mode that sets in advance, corresponding in short-term all the indicated code words of PMI component of PMI component are defined as the cyclic prefix codeword set during determined each length.

25. according to claim 23 or 24 described devices, it is characterized in that, this device further comprises the first acquisition module, channel information when being used for obtaining described down channel long, and channel information sends to the first determination module during the described down channel that will obtain long;

26. the reception signal processing apparatus of many antennas is characterized in that this device comprises: the second determination module, CQI computing module and demodulation module in the downlink system; Wherein,

27. device according to claim 26, it is characterized in that, described the second determination module, when also being used for to obtain the beam coverage of more wide-angle expansion, channel information during according to described down channel long, select adjacent PMI component when long more than, with adjacent PMI component when long more than of selecting, PMI component during long during described down channel long in the channel information, and according to selected each corresponding in short-term all indicated code word of PMI component of PMI component when long that predetermined selection mode is determined, be defined as the cyclic prefix codeword set;

28. according to claim 26 or 27 described devices, it is characterized in that, this device further comprises: the second acquisition module, be used for by measuring down channel, channel information when obtaining the described down channel identical with the base station long, and channel information sends to the second determination module will obtain the described down channel identical with the base station long the time;

29. the signal processing system of many antennas is characterized in that this system comprises: the reception signal processing apparatus of many antennas in the transmission signal processing equipment of many antennas and the downlink system in the downlink system in the downlink system; The transmission signal processing equipment of many antennas further comprises in the downlink system: the first determination module and precoding module; The reception signal processing apparatus of many antennas further comprises in the downlink system: the second determination module, CQI computing module and demodulation module; Wherein,

30. system according to claim 29, it is characterized in that, described the first determination module, also be used in the time need to obtaining the beam coverage of more wide-angle expansion, channel information during according to described down channel long, select adjacent PMI component when long more than, with adjacent PMI component when long more than of selecting, PMI component during long during described down channel long in the channel information, and according to the selection mode that sets in advance, corresponding in short-term all the indicated code words of PMI component of PMI component are defined as the cyclic prefix codeword set during determined each length; And/or,

31. according to claim 29 or 30 described systems, it is characterized in that, the reception signal processing apparatus of many antennas further comprises in the described downlink system: the first acquisition module, channel information when being used for obtaining described down channel long, and channel information sends to the first determination module during the described down channel that will obtain long;