WO2014202025A1

WO2014202025A1 - Method and device for correcting multi-antenna channel, and base station system

Info

Publication number: WO2014202025A1
Application number: PCT/CN2014/080415
Authority: WO
Inventors: 易越凡
Original assignee: 华为技术有限公司
Priority date: 2013-06-20
Filing date: 2014-06-20
Publication date: 2014-12-24
Also published as: CN104243055A; CN104243055B

Abstract

A method and device for correcting a multi-antenna channel, and a base station system. The method comprises: detecting whether a correction passage in a radio-frequency unit of a multi-antenna base station system is effective or not; if the correction passage in the radio-frequency unit is effective, correcting a channel of each antenna in the multi-antenna base station system by using the correction passage; alternatively, if the correction passage in the radio frequency unit loses effectiveness, correcting channels of other antennas by taking any antenna in the multi-antenna base station system as a standard. By means of the multi-antenna channel correction method, the problem in the prior art of wasted investment due to the fact that the correction technology using a dedicated correction passage is only suitable for new radio-frequency units, and that radio-frequency units without a correction passage require a hardware update or transformation is solved.

Description

METHOD AND APPARATUS AND BASE STATION SYSTEM FOR MULTIPLE ANTENNA CHANNEL CALIBRATION This application claims to Chinese Patent Application No. 201310247586.7, filed on June 20, 2013, entitled "Method, Apparatus and Base Station System for Multi-antenna Channel Correction" Priority is hereby incorporated by reference in its entirety. The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a base station system for multi-antenna channel correction.

BACKGROUND OF THE INVENTION Multi-antenna wireless communication systems, such as Long Term Evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMax), which are widely used at present, are required to ensure that all service antennas correspond to each other. Up and down channel characteristics reciprocity and consistency in the propagation channel to achieve good performance of transmitting and receiving signals; specifically, by using channel correction technology, that is, transmitting and receiving specific sequences to measure uplink and downlink channels of each antenna The eigenvalues are then calculated by a certain algorithm to calculate the uplink and downlink channel compensation coefficients for each channel, and the channel compensation coefficients are applied to the transmitted signal and the received signal, respectively, to ensure channel consistency and reciprocity.

In the prior art, a radio channel unit (Radio Unit, hereinafter referred to as RU) in a multi-antenna base station system integrates a special correction channel to correct reciprocity and consistency between multiple antennas.

However, the prior art is only applicable to newer RUs, and hardware upgrades or modifications are required for RUs without correction channels, resulting in wasted investment. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method, a device, and a base station system for multi-antenna channel correction. It is determined that the channel correction technology using the special correction channel in the prior art is only applicable to the newer RU, and the hardware update or modification is required for the RU without the correction channel, which causes waste of investment.

A first aspect of the present invention provides a method for multi-antenna channel correction, including: detecting whether a correction channel in a radio unit in a multi-antenna base station system is valid;

If the correction channel in the radio unit is valid, the correction channel is used to correct the channel of each antenna in the multi-antenna base station system; or

If the correction channel in the radio unit fails, the channels of the other antennas are corrected based on any one of the antenna systems of the multi-antenna.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining whether the correcting channel in the radio frequency unit in the base station system of the multiple antenna is valid includes:

Detecting whether the correction channel is valid according to a characteristic value of a signal received by the antenna according to a signal sent by the correction channel; or

Detecting whether the correction channel is valid according to a characteristic value of a signal received by the antenna at the correction channel.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the signal sent by the correcting channel detects the characteristic value of a signal received by the antenna Whether the calibration channel is valid, including:

And if the characteristic value of the signal received by the correction channel at the antenna is in a preset interval [w. ^^, determining that the correction channel is valid, wherein, the signal sent by the correction channel is a lower limit value of a characteristic value of a signal received by the antenna, and ^Q is a signal sent by the correction channel. The upper limit value of the characteristic value of the signal received by the antenna.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the detecting, according to a characteristic value of a signal received by the antenna in the correction channel, detecting the Whether the calibration channel is valid, including:

If the characteristic value of the signal received by the antenna in the correction channel is in a preset area Between [ . ^'. Determining that the correction channel is valid, wherein the signal sent by the antenna is a lower limit value of a characteristic value of a signal received by the correction channel, "the signal transmitted for the antenna is in the correction The upper limit of the eigenvalue of the signal received by the channel.

With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the correcting in the radio frequency unit in the base station system for detecting multiple antennas Before the channel is valid, the method further includes:

A hardware in-position signal is detected in the radio frequency unit, and if present, it is determined that there is a correction channel in the radio frequency unit.

In conjunction with the first aspect to any one of the fourth possible embodiments of the first aspect, in a fifth possible implementation of the first aspect, The channels of each antenna in the base station system are corrected, including:

A correction signal is transmitted between the correction channel and the antenna, and a channel of each antenna in the base station system of the multi-antenna is corrected according to the correction signal.

With reference to any one of the first aspect to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the antenna in the multi-antenna base station system For the reference, correct the channels of other antennas, including:

A correction signal is transmitted between any of the antennas of the multi-antenna base station system and the other antennas, and channels of the other antennas are corrected according to the correction signal.

A second aspect of the present invention provides a multi-antenna channel correction apparatus, including:

a first detecting module, configured to detect whether a calibration channel in the radio unit in the multi-antenna base station system is valid;

a processing module, configured to: if the calibration channel in the radio frequency unit is valid, use the correction channel to correct a channel of each antenna in the multi-antenna base station system; or, if used in the radio frequency unit If the correction channel fails, the channels of the other antennas are corrected based on any antenna in the multi-antenna base station system.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first check The test module includes:

a first detecting unit, configured to detect, according to a characteristic value of a signal received by the antenna, whether the calibration channel is valid according to a signal sent by the correction channel; or

And a second detecting unit, configured to detect, according to a characteristic value of the signal received by the correction channel in the signal sent by the antenna, whether the correction channel is valid.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the first detecting unit is specifically configured to: when the signal sent by the correcting channel is received by the antenna The characteristic value of the signal is in the preset interval [ . ' . Within ^^, it is determined that the correction channel is valid, wherein 3⁄4^ is the lower limit value of the characteristic value of the signal received by the correction channel at the antenna. "The upper limit value of the characteristic value of the signal received by the signal transmitted by the antenna for the correction channel.

With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the second detecting unit is specifically configured to: if the signal sent by the antenna is received in the correcting channel The characteristic value of the signal is in the preset interval [ . ' . Within ^^, it is determined that the correction channel is valid, wherein the signal is a lower limit value of a characteristic value of a signal received by the antenna at the correction channel. "The upper limit value of the characteristic value of the signal received by the signal transmitted by the antenna at the correction channel.

In conjunction with the second aspect, the third possible implementation of the second aspect, the fourth possible implementation of the second aspect, the device further includes:

a second detecting module, configured to detect whether a hardware in-position signal exists in the radio frequency unit, and if yes, determine, in the radio frequency unit, whether the correcting channel in the radio frequency unit is valid in the base station system for detecting the multi-antenna There is a correction channel.

With reference to any one of the second aspect to the fourth possible implementation of the second aspect, in a fifth possible implementation of the second aspect, the processing module is specifically configured to be in the correction channel and Transmitting a correction signal between the antennas, and bases the multi-antenna according to the correction signal The channels of the individual antennas in the station system are corrected.

With reference to any one of the second aspect to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the processing module is further used in the multiple antenna A correction signal is transmitted between any antenna in the base station system and the other antenna, and channels of the other antennas are corrected according to the correction signal.

A third aspect of the present invention provides a base station system, comprising: a baseband unit, a radio frequency unit, and the apparatus for multi-antenna channel correction according to any one of the second aspect to the sixth aspect of the second aspect.

In conjunction with the third aspect, in a first possible implementation of the third aspect, the apparatus for multi-antenna channel correction is disposed on the baseband unit or on the radio frequency unit.

The method provided by the embodiment of the present invention corrects the channel of each antenna in the base station system of the antenna in the radio unit in the multi-antenna base station system, or, under the premise of correcting the channel failure, the multi-antenna base station system The antenna is used as a reference to correct the channels of other antennas, that is, the switching of the two channel correction technologies is realized by the above-mentioned mechanism for detecting whether the channel is valid, thereby effectively reducing the investment cost.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a schematic flowchart of Embodiment 1 of a method for multi-antenna channel correction according to the present invention; FIG. 2 is a schematic flowchart of Embodiment 2 of a method for multi-antenna channel correction according to the present invention; FIG. 3 is a multi-antenna channel provided by the present invention. A schematic structural diagram of the corrected device embodiment 1; 4 is a schematic structural diagram of a second embodiment of a multi-antenna channel correction apparatus according to the present invention; FIG. 5 is a schematic structural diagram of a third embodiment of a multi-antenna channel correction apparatus according to the present invention; a schematic diagram of the structure of the first example;

FIG. 7 is a schematic structural diagram of Embodiment 2 of a base station system according to the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The techniques described herein can be used in a variety of communication systems, such as current 2G, 3G communication systems and next generation communication systems, such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA, Code Division Multiple). Access system, time division multiple access (TDMA, Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA), Frequency Division Multiple Access (FDMA), Frequency Division Multiple Addressing system, Orthogonal Frequency OFDMA (Orthogonal Frequency-Division Multiple Access) system, single carrier FDMA (SC-FDMA) system, General Packet Radio Service (GPRS) system, Long Term Evolution (LTE) system, Wireless Local Area Networks (hereinafter referred to as WLAN), and other such communication systems.

A base station (e.g., an access point) referred to in this application may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate the air Property management of the interface. For example, the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), this application is not limited.

FIG. 1 is a schematic flowchart of a first embodiment of a method for correcting multiple antenna channels according to the present invention. The method for performing the method in this embodiment is a base station. As shown in FIG. 1, the method includes:

S101: Check whether the correction channel in the radio unit in the multi-antenna base station system is valid. Specifically, the base station is divided into a baseband unit and a radio frequency unit, and the baseband unit and the radio frequency unit are all implemented by corresponding hardware circuits; the baseband part generates a specific sequence for correction, and is converted into a correction signal by the radio frequency unit, and the base station uses the correction signal And the corresponding channel correction technology ensures channel reciprocity and consistency when transmitting and receiving signals between multiple antennas.

In the embodiment of the present invention, the base station initiates a channel correction process, and determines whether the correction channel of the radio unit in the multi-antenna base station system is valid.

S102: if the correction channel in the radio unit is valid, correcting the channel of each antenna in the multi-antenna base station system by using the above correction channel; or, if the correction channel in the radio unit fails, using the multi-antenna base station system Any one of the antennas is used as a reference to correct the channels of other antennas.

Specifically, it is divided into two implementation methods:

The first type: if the correction channel in the radio frequency unit is valid, the baseband part control base station uses a correction technique with a dedicated correction channel to correct the channel of each antenna in the multi-antenna base station system, that is, the radio unit in the base station A special correction channel hardware is integrated on the channel. When the channel is corrected, the baseband portion of the base station generates a specific correction sequence, which is converted into a correction signal by the radio unit, and is sent out by the correction channel or antenna on the radio unit, and the antenna can be a service. Correspondingly, the service antenna or the correction channel on the radio unit receives the transmitted correction signal and outputs it to the baseband portion, and the baseband portion calculates the compensation coefficient of the uplink and downlink channels according to the transmitted correction signal and the received correction signal, It is used to transmit signals or receive signals to ensure Channel consistency and reciprocity.

Second: If the correction channel in the radio unit fails, the base station unit controls the base station to correct the channel of each antenna in the multi-antenna base station system by using a correction technique without a dedicated correction channel. The correction technique without dedicated correction channel is applicable to the old RF unit, that is, the RF unit without integrated correction channel hardware. The calibration process without dedicated correction channel is as follows: The service antenna serves as a reference, and a specific correction signal is transmitted and received between the other service antennas and the reference antenna to complete channel correction for other antennas.

The method provided by the embodiment of the present invention detects whether the correction channel in the radio frequency unit in the multi-antenna base station system is valid, and uses the correction channel to perform channel on each antenna in the multi-antenna base station system on the premise that the correction channel is valid. Correction, or, under the premise of correcting the channel failure, correcting the channels of other antennas based on any antenna in the multi-antenna base station system, that is, implementing two channel corrections by the above-mentioned mechanism for detecting whether the channel is valid or not The switching of technology effectively reduces investment costs.

On the basis of the embodiment shown in FIG. 1 , the foregoing S101 includes: detecting, according to a characteristic value of a signal received by the antenna, whether a correction channel is valid according to a signal sent by the correction channel; or: correcting a channel according to the signal sent by the antenna The characteristic value of the received signal detects whether the correction channel is valid.

Specifically, the receiving and receiving of the correction signal in this embodiment is mainly divided into two implementation manners. The first type: the correction signal is sent through the correction channel and received by the service antenna on the radio frequency unit; the second type: the correction signal is transmitted through the radio frequency unit. The upper service antenna is transmitted and received by the correction channel; however, regardless of the manner in which the correction signal is transmitted and received, the calibrated value of the received correction signal can be used to detect whether the correction channel is valid.

Further, on the basis of the foregoing embodiment, whether the correction channel is valid according to the characteristic value of the signal received by the antenna according to the signal sent by the correction channel, includes: if the signal sent by the correction channel is characterized by the signal received by the antenna The value is in the preset interval [ . ' . Within ^] Determining that the correction channel is valid, wherein a signal sent by the correction channel is a lower limit value of a characteristic value of a signal received by the antenna, and an upper limit value of a characteristic value of a signal received by the antenna for the correction channel received by the antenna .

Specifically, the embodiment is directed to the case where the correction signal is sent by the correction channel and received by the service antenna on the radio unit, and the base station detects whether the characteristic value of the correction signal received on the service antenna of the radio unit is in a preset interval. . ' . ^] internally determines whether the correction channel is valid (generally the correction signal changes during transmission and reception due to wireless conditions, etc.), where 3⁄4^ is the characteristic of the signal received by the signal transmitted by the correction channel at the service antenna The lower limit value of the value, "the upper limit value of the characteristic value of the signal received by the service antenna for the signal transmitted by the correction channel; if the characteristic value of the correction signal received by the service antenna is within the preset interval, the correction channel is valid, Then, the baseband part control base station uses a correction technique with a dedicated correction channel to perform correction; if the characteristic value of the correction signal received by the service antenna is not within the preset interval, the correction channel is lost.

Here, the signal to interference plus noise ratio (SINR) of the correction signal is used as a characteristic value of the correction signal to illustrate: flat = ^

The base station calculates the correction signal received by the antenna of the radio unit according to the formula

RSRP = one Z \

SINR, and determining whether the correction channel is valid according to the SINR, wherein, σ=1

^Ν »-ι , the ^ is the sequence value of the signal received by the antenna, Ν is the sequence length of the correction signal received by the antenna, and is the conjugate value of the sequence value of the signal sent by the correction channel, if the signal sent by the correction channel is corrected The value of the SINR of the signal received at the antenna is within a preset interval

[3⁄4^'. Within ^^, it is determined that the correction channel is valid, and if the value of the SINR of the signal received by the correction channel at the antenna is not in the preset interval [. ' . Within ^], it is determined that the correction channel is invalid. Where 3⁄4^ is the lower limit of the SINR of the signal received by the antenna at the correction channel. ^ The upper limit of the siNR of the signal received by the antenna for the correction channel. Further, based on the foregoing embodiment, whether the correction channel is valid according to the characteristic value of the signal received by the antenna in the correction channel according to the signal sent by the antenna includes: if the signal sent by the antenna is in a signal received by the correction channel The value is in the preset interval [ . ' . ^], determining that the correction channel is valid, wherein, the signal transmitted by the antenna is a lower limit value of a characteristic value of a signal received by the correction channel, and ^Q is a signal of the signal transmitted by the antenna in the correction channel. The upper limit of the eigenvalue.

Specifically, the embodiment is directed to the case where the correction signal is sent by the service antenna on the radio frequency unit and received by the correction channel, and the base station detects whether the characteristic value of the correction signal received by the correction channel is in a preset interval. ' . ^] internally determines whether the correction channel is valid (generally the correction signal changes during transmission and reception due to wireless conditions, etc.), wherein the signal transmitted by the antenna on the radio unit is corrected in the signal received by the channel The lower limit of the eigenvalue, . "The upper limit value of the characteristic value of the signal received by the antenna on the radio frequency unit in the correction channel; if the characteristic value of the correction signal received by the correction channel is within the preset interval, then the correction channel is valid, then the baseband portion The control base station uses a correction technique with a dedicated correction channel for correction; if the characteristic value of the corrected correction signal is not within the preset interval, the correction channel fails, and the baseband portion controls the base station to use without special correction The correction technique of the channel is corrected; here, the SINR of the correction signal is used as a characteristic value of the correction signal to illustrate: flat = ^

The base station calculates the SINR of the correction signal received by the correction channel according to the formula.

RSRP =

SINR determines that the correction channel is a Z\

And according to the no effect, where, ,

, the ⁷ ^ " is the sequence value of the signal received by the above correction channel, N is the correction The sequence length of the correction signal received by the channel, "the conjugate value of the sequence value of the signal transmitted by the antenna on the radio unit, if the value of the SINR of the signal received by the antenna on the radio unit in the correction channel is preset Within the interval [ . ' ^β ^'"], it is determined that the correction channel is valid. If the signal transmitted by the antenna on the radio unit is in the correction channel, the SINR value of the signal is not in the preset interval [3⁄4^'. Within ^^, the correction channel failure is determined, wherein the signal sent by the antenna on the radio unit is the lower limit of the SINR of the signal received by the correction channel, "the signal transmitted by the antenna on the radio unit is received in the correction channel. The upper limit of the SINR.

The method provided by the embodiment of the present invention corrects the channel of each antenna in the base station system of the antenna in the radio unit in the multi-antenna base station system, or, under the premise of correcting the channel failure, the multi-antenna base station system The antenna is used as a reference to correct the channels of other antennas, that is, the switching of the two channel correction techniques is realized by the above mechanism for detecting whether the channel is valid, and the maximum compatibility with the correction technique with a dedicated correction channel and without special correction is achieved. Channel correction technology, especially in the case of the transition of the old RF unit to the new RF unit (the old RF unit without correction channel, the new RF unit with correction channel) or the correction channel of the RF unit is damaged, can automatically identify whether it can Using a correction technique with a dedicated correction channel and switching to a calibration technique that does not require a dedicated correction channel, when the dedicated correction channel is not available, the availability of channel correction is guaranteed, effectively reducing investment costs.

2 is a schematic flowchart of Embodiment 2 of a method for multi-antenna channel correction according to the present invention. The method in this embodiment detects whether a correction channel exists before the base station detects whether the correction channel is valid, and uses different channels according to the detection result. The correction technique, based on the embodiment shown in FIG. 1 above, further, before the foregoing S101, further includes:

S201: Detect whether a hardware in-position signal exists in the radio frequency unit, and if yes, determine that a correction channel exists in the radio frequency unit.

Specifically, the base station detects whether there is a correction channel in the radio frequency unit, and the detection manner is Detect whether there is a hardware in-position signal in the radio frequency unit, because a special correction channel hardware is integrated in the radio unit with a dedicated correction channel to generate a hardware in-position signal; if the base station detects the hardware in-position signal, it is determined A correction channel exists in the radio frequency unit, and a hardware in-position signal is not detected in the calibration station, and it is determined that there is no correction channel in the radio unit, and the base station uses a correction technique without a dedicated correction channel for correction.

More specifically, the base station detects whether there is a correction channel in the radio frequency unit, and may be a baseband part in the base station to detect, or the radio frequency unit itself detects whether a correction channel exists, and reports the detection result to the baseband part, or may be a radio frequency unit. The self-test detects whether there is a correction channel, and the baseband portion itself queries the detection result, and then performs a corresponding operation according to the detection result.

Further, on the basis of the foregoing embodiment, the correcting channel is used to correct the channel of each antenna in the multi-antenna base station system, including: transmitting a correction signal between the correction channel and the antenna, and the multi-antenna according to the correction signal The channels of the respective antennas in the base station system are corrected.

Specifically, when performing channel correction, the baseband portion of the base station generates a specific correction sequence, which is converted into a correction signal by the radio frequency unit, and is sent out by the correction channel or the antenna on the radio frequency unit, and the antenna may be a service antenna; corresponding, the radio frequency The service antenna or the correction channel on the unit receives the transmitted correction signal and outputs it to the baseband portion, and the baseband portion calculates the compensation coefficient of the uplink and downlink channel according to the transmitted correction signal and the received correction signal, and applies it to the transmission signal or Receive signals to ensure channel consistency and reciprocity.

Further, based on the foregoing embodiment, the channel of the other antenna is corrected based on any antenna in the multi-antenna base station system, and includes: between any antenna in the multi-antenna base station system and other antennas The correction signal is transmitted, and the channels of the other antennas are corrected according to the correction signal.

Specifically, when performing channel correction, the baseband portion of the base station generates a specific correction sequence, converts it into a correction signal via the radio frequency unit, and transmits the signal through a certain service antenna on the radio frequency unit. The service antenna can be regarded as a reference antenna, and the correction signal is received through other service antennas on the radio frequency unit and output to the baseband portion; or the correction signal can be sent through other service antennas on the radio unit And received by another service antenna as a reference, and outputted to the baseband portion; after that, the baseband portion calculates the compensation coefficient of the uplink and downlink channels according to the transmitted correction signal and the received correction signal, and applies it to the transmission signal. Or receive signals to ensure channel consistency and reciprocity.

One of ordinary skill in the art will appreciate that all or part of the steps to implement the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the above-described method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

FIG. 3 is a schematic structural diagram of Embodiment 1 of a device for correcting multi-antenna channel according to the present invention. As shown in FIG. 3, the device includes: a first detecting module 30, configured to detect a correction in a radio unit in a multi-antenna base station system. Whether the channel is valid; the processing module 31 is configured to: if the correction channel in the radio frequency unit is valid, use the correction channel to each day of the multi-antenna base station system The channel of the line is corrected; or, if the correction channel in the radio unit fails, the channel of the other antenna is corrected based on any antenna in the base station system of the multi-antenna.

The apparatus for multi-antenna channel correction in this embodiment may perform the method embodiment of the multi-antenna channel correction described above, and the implementation principle and technical effects are similar, and details are not described herein again.

4 is a schematic structural diagram of Embodiment 2 of a base station according to the present invention. On the basis of the embodiment shown in FIG. 3, the first detecting module 30 includes: a first detecting unit 301, configured to send according to the correcting channel. Detecting whether the correction channel is valid according to the characteristic value of the signal received by the antenna; or, the second detecting unit 302, configured to detect, according to the characteristic value of the signal received by the correction channel, the signal sent by the antenna Whether the correction channel is valid; and the first detecting unit 301 is specifically configured to: if the signal sent by the correction channel, the characteristic value of the signal received by the antenna is in a preset interval [ . ' . Within ^^, it is determined that the correction channel is valid, wherein, the signal sent by the correction channel is a lower limit value of a characteristic value of a signal received by the antenna, and ^Q " is a signal sent by the correction channel. The upper limit value of the characteristic value of the signal received by the antenna; the second detecting unit 302 is specifically configured to: if the signal sent by the antenna is in the calibration channel, the characteristic value of the signal is in a preset interval [. Within the ^^, determining that the correction channel is valid, wherein, the signal sent by the antenna is a lower limit value of a characteristic value of a signal received by the correction channel, "the signal sent for the antenna is in the The upper limit value of the eigenvalue of the signal received by the correction channel.

FIG. 5 is a schematic structural diagram of Embodiment 3 of a device for correcting multiple antenna channels according to the present invention. On the basis of the foregoing embodiment shown in FIG. 4, the device further includes: a second detecting module 32, configured to detect Detecting whether there is a hardware in-position signal in the radio frequency unit, and if so, determining that a correction channel exists in the radio frequency unit; and the processing module 31 Used in the correction channel and the Transmitting a correction signal between the antennas, correcting a channel of each antenna in the base station system of the multiple antenna according to the correction signal; and also for using between any antenna in the base station system of the multiple antenna and the other antenna A correction signal is transmitted, and channels of the other antennas are corrected according to the correction signal.

FIG. 6 is a schematic structural diagram of Embodiment 1 of a base station system according to the present invention. FIG. 7 is a schematic structural diagram of Embodiment 2 of a base station system according to the present invention. Referring to FIG. 6 and FIG. 7 , the base station system includes a baseband unit 60 and a radio frequency. Unit 61 and apparatus 62 for multi-antenna channel correction as described in any of the above-described embodiments of Figures 3, 4, and 5.

The method for performing the multi-antenna channel correction described above may be performed by the base station system in this embodiment, and the implementation principle and technical effects are similar, and details are not described herein again.

Further, referring to FIG. 6, the multi-antenna channel correction device may be disposed on the baseband unit 60; and referring to FIG. 7, the multi-antenna channel device may also be disposed on the radio frequency unit 61.

It should be noted that the multi-antenna channel correction apparatus in the above embodiment is disposed in the baseband unit.

60 is used to determine whether the correction channel is valid or not. ^'. The value of the multi-antenna channel correction device is set on the radio frequency unit 61 to determine whether the correction channel is valid or not. ' . The value of ^] may be the same or different, and the present invention is not limited thereto.

It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

Rights request

1. A method for multi-antenna channel correction, characterized by including:

Detect whether the correction channel in the radio frequency unit in the multi-antenna base station system is valid;

If the correction channel in the radio frequency unit is valid, use the correction channel to correct the channels of each antenna in the multi-antenna base station system; or,

If the correction channel in the radio frequency unit fails, any antenna in the multi-antenna base station system is used as a reference to correct the channels of other antennas.

2. The method according to claim 1, characterized in that the detection of whether the correction channel in the radio frequency unit in the multi-antenna base station system is valid includes:

Detect whether the correction channel is valid based on the characteristic value of the signal received by the antenna based on the signal sent by the correction channel; or,

Whether the correction channel is valid is detected based on the characteristic value of the signal sent by the antenna and received in the correction channel.

3. The method according to claim 2, wherein detecting whether the correction channel is valid based on the characteristic value of the signal received by the antenna based on the signal sent by the correction channel includes:

If the characteristic value of the signal sent by the correction channel and received by the antenna is in the preset interval [ w . ^], then it is determined that the correction channel is valid, where ¾ is the lower limit value of the characteristic value of the signal received by the antenna at the signal sent by the correction channel, ^Q is the signal sent by the correction channel at the The upper limit of the characteristic value of the signal received by the antenna.

4. The method according to claim 2, characterized in that, detecting whether the correction channel is valid based on the characteristic value of the signal sent by the antenna and received in the correction channel includes:

If the characteristic value of the signal sent by the antenna and received in the correction channel is in the preset interval [. ^'. ], then it is determined that the correction channel is valid, where ¾^ is the signal sent by the antenna " is the lower limit value of the characteristic value of the signal received by the correction channel, " is the upper limit value of the characteristic value of the signal sent by the antenna and received by the correction channel.

5. The method according to any one of claims 1 to 4, characterized in that before detecting whether the correction channel in the radio frequency unit in the multi-antenna base station system is valid, it further includes:

Detect whether there is a hardware presence signal in the radio frequency unit. If there is, it is determined that a correction channel exists in the radio frequency unit.

6. The method according to any one of claims 1 to 5, characterized in that, using the correction channel to correct the channels of each antenna in the multi-antenna base station system includes: in the correction A correction signal is transmitted between the channel and the antenna, and the channel of each antenna in the multi-antenna base station system is corrected according to the correction signal.

7. The method according to any one of claims 1 to 6, characterized in that, using any antenna in the multi-antenna base station system as a reference to correct the channels of other antennas includes: Correction signals are transmitted between any antenna in the multi-antenna base station system and the other antennas, and the channels of the other antennas are corrected based on the correction signals.

8. A multi-antenna channel correction device, characterized by including:

The first detection module is used to detect whether the correction channel in the radio frequency unit in the multi-antenna base station system is valid;

A processing module, configured to use the correction channel to correct the channels of each antenna in the multi-antenna base station system if the correction channel in the radio frequency unit is valid; or, if the correction channel in the radio frequency unit is valid, If the correction channel fails, any antenna in the multi-antenna base station system is used as a reference to correct the channels of other antennas.

9. The device according to claim 8, characterized in that the first detection module includes: a first detection unit, configured to detect the signal sent by the correction channel according to the characteristic value of the signal received by the antenna. whether the above correction channel is valid; or,

The second detection unit is configured to detect whether the correction channel is valid based on the characteristic value of the signal sent by the antenna and received in the correction channel.

10. The device according to claim 9, wherein the first detection unit is specifically configured to: if the characteristic value of the signal sent by the correction channel and received by the antenna is within a preset interval, then Determine that the correction channel is valid, where, is the lower limit value of the characteristic value of the signal sent by the correction channel and received by the antenna, ^Q is the characteristic value of the signal sent by the correction channel and received by the antenna The upper limit of the value.

11. The device according to claim 9, wherein the second detection unit is specifically configured to detect if the characteristic value of the signal sent by the antenna and received by the correction channel is within a preset interval [. ^' ^β „], it is determined that the correction channel is valid, where, is the lower limit value of the characteristic value of the signal received by the correction channel for the signal sent by the antenna, " is the signal sent by the antenna at the The upper limit of the characteristic value of the signal received by the correction channel.

12. The device according to any one of claims 8-11, characterized in that the device further includes:

The second detection module is used to detect whether there is a hardware presence signal in the radio frequency unit before detecting whether the correction channel in the radio frequency unit is valid in the multi-antenna base station system. If it exists, determine whether the correction channel in the radio frequency unit is valid. Correction channels exist.

13. The device according to any one of claims 8-12, characterized in that the processing module is specifically configured to transmit a correction signal between the correction channel and the antenna, and perform Correct the channels of each antenna in the multi-antenna base station system.

14. The device according to any one of claims 8-13, characterized in that the processing module is also used to transmit correction signals between any antenna and the other antennas in the multi-antenna base station system. , correct the channels of the other antennas according to the correction signal.

15. A base station system, characterized in that it includes a baseband unit, a radio frequency unit and a multi-antenna channel correction device according to any one of claims 8-14.

16. The base station system according to claim 15, characterized in that the device for multi-antenna channel correction is provided on the baseband unit or on the radio frequency unit.