WO2014205740A1

WO2014205740A1 - Method and device for calibrating channel based on antenna feed system, and base station

Info

Publication number: WO2014205740A1
Application number: PCT/CN2013/078187
Authority: WO
Inventors: 张鹏程
Original assignee: 华为技术有限公司
Priority date: 2013-06-27
Filing date: 2013-06-27
Publication date: 2014-12-31
Also published as: CN103828270A; CN103828270B

Abstract

Disclosed are a method and device for calibrating a channel based on an antenna feed system, and a base station, which belong to the technical field of communications. The method comprises: a base station receiving a reference detection signal sent by a UE in a plurality of channels of an antenna feed system, obtaining a second phase difference between the channels in combination with a pre-set reference detection signal, acquiring a phase difference therebetween, obtaining a first phase difference between the channels by means of the phase difference therebetween, and then obtaining a phase calibration quantity of a static passive network, and thereby conducting channel calibration. The device comprises: a receiving module, a phase difference acquisition module, a first phase difference acquisition module, a second phase difference acquisition module, a phase calibration quantity acquisition module of a static passive network, and a channel calibration module. The base station comprises: a receiver, a processor and a controller. By conducting calibration on phases among channels, the present invention enables factors which are susceptible to outside influence to be effectively compensated, thereby being beneficial for conducting accurate BF and VAM, and improving the transmission and coverage of a wireless network.

Description

Channel calibration method, device and base station based on antenna feeder system

The present invention relates to the field of communications technologies, and in particular, to a channel calibration method, apparatus, and base station based on an antenna feeder system. Background technique

In order to make the antenna system reach higher transmission rate and higher coverage in the process of perfecting the wireless network, BF (Beam Forming) and VAM (Virtual Atenna Mapping) become necessary. Key issues to consider. To perform BF and VAM, the channel of the antenna feeder system must be calibrated.

For channel phase calibration, the general calibration idea: The transmitting channel sends a reference signal, and the loopback receives and detects a channel vector through the calibration branch, and the phase vector of each calibration channel is phase-aligned by phase compensation. According to the path of the transmission loopback, there are generally two calibration methods: 1. External calibration, the loopback path includes the active part to the passive part inside the antenna, and enters the calibration channel through the standard coupling loop; 2. Internal calibration The loopback path has only the active part and enters the calibration channel through the standard coupling loop. Generally, both internal and external calibration can achieve the requirements of uplink and downlink reciprocity, and can guarantee the benchmark of BF.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems: In the case of active internal calibration, although the active channel calibration method can achieve the purpose of uplink and downlink reciprocal channel calibration, the antenna air interface array However, the phase difference alignment cannot be achieved, mainly because the channel calibration of the passive part is often affected by the external environment and device characteristics, such as the phase shift error of the wireless network, the inaccuracy of the feeder cut, and the elastic error of the joint, which makes it impossible to perform. Accurate BF and VAM affect the coverage and transmission of wireless networks. Summary of the invention ^ ^ 7 j head now found to be "bad mediated ¾, 1 ^ dry hunting 'shadow BU ^1, is now between the head of ^ ¾ meter back, a channel embodiment provides a calibration method based on the antenna system of the present invention, apparatus And the base station. The technical solution is as follows:

In a first aspect, a channel calibration method based on an antenna feeder system is provided, the method comprising: receiving, by a base station, a reference sounding signal sent by a UE in multiple channels of an antenna feeder system;

And obtaining, by the base station, a phase difference between a corresponding reference detection signal and the preset reference detection signal in the multiple channels according to the preset reference detection signal and the reference detection signal received in the multiple channels;

Obtaining a first phase difference between the channels according to the phase difference;

The base station performs correlation measurement according to the preset reference sounding signal and the reference sounding signal sent by the UE, and obtains a second phase difference between the channels;

Obtaining a static passive network phase calibration amount according to the first phase difference and the second phase difference; and calibrating a plurality of channels corresponding to channels that are reciprocal to the current channel according to the static passive network phase calibration amount ;

With reference to the first aspect, in a first possible implementation manner of the first aspect, the correlation measurement includes a coherent phase calculation between the polarized channels in the same column polarization calibration; or, between the polarization channels in the same polarization calibration Coherent phase calculation

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the coherent phase calculation is performed in a time domain or a frequency domain;

With reference to the first aspect, in a third possible implementation manner of the first aspect, the UE is a UE whose signal and interference plus noise ratio SINR is greater than a preset threshold and located in a normal direction of a pattern of the antenna feeder system;

In conjunction with the first aspect, in a fourth possible implementation manner of the first aspect, the static passive network phase calibration amount is equal to a difference between a phase difference between the channel and a phase difference between the inner calibration channels obtained by the correlation measurement. Brother 20,000 lit?, pull J ^ ^ f丞亇久乐乐 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 a detection signal, a phase difference acquisition module, configured to acquire a corresponding reference detection signal and the preset reference detection signal of the plurality of channels according to the preset reference detection signal and the reference detection signal received in the multiple channels Phase difference between

a first phase difference acquisition module, configured to obtain a first phase difference between the channels according to the phase difference, and a second phase difference acquisition module, configured to perform, according to the preset reference detection signal and the reference detection signal sent by the UE, Correlation measurement, obtaining a second phase difference between the channels;

a static passive network phase calibration quantity acquisition module, configured to obtain a static passive network phase calibration quantity according to the first phase difference and the second phase difference;

A channel calibration module is configured to calibrate multiple channels corresponding to channels that are reciprocal to the current channel. With reference to the second aspect, in a first possible implementation manner of the second aspect, the correlation measurement includes a coherent phase calculation between the polarized channels in the same column polarization calibration; or, between the polarized channels in the same polarization calibration Coherent phase calculation.

In conjunction with the first possible implementation of the second aspect, in a second possible implementation of the second aspect, the coherent phase calculation is performed in a time domain or a frequency domain.

With reference to the second aspect, in a third possible implementation manner of the second aspect, the UE is a UE whose signal and interference plus noise ratio SINR is greater than a preset threshold and located in a normal direction of a pattern of the antenna feeder system;

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, the static passive network phase calibration quantity is equal to a difference between a channel-to-channel phase difference obtained by the correlation measurement and a phase difference between the inner calibration channels. In a third aspect, a base station includes: a receiver, a transmitter, a memory, and a processor, wherein the receiver, the transmitter, and the memory are respectively connected to the processor, and the memory stores code, Γ Γ Γ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ And a reference detection signal and a reference detection signal received in the plurality of channels, obtaining a phase difference between a corresponding reference detection signal and the preset reference detection signal in the plurality of channels; obtaining, according to the phase difference, a first phase difference between the channels; performing a correlation measurement according to the preset reference detection signal and the reference detection signal sent by the UE, to obtain a second phase difference between the channels; according to the first phase difference and the second The phase difference is obtained, and the static passive network phase calibration amount is obtained; and the plurality of channels corresponding to the channel that is reciprocal to the current channel are calibrated according to the static passive network phase calibration amount.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention are:

Receiving the reference detection signal sent by the UE, and comparing and matching the received reference detection signal with the preset reference detection signal to obtain a phase difference between the two, thereby obtaining a first phase difference between the channels and performing correlation measurement. The second phase difference between the channels, thereby obtaining the static passive network phase calibration amount, and calibrating the multiple channels passing through the air interface, so that the phase shift error of the wireless network, the inaccuracy of the feeder cut, the elastic error of the joint, etc. are obtained. Effective compensation, the phase difference between the channels remains the same, which is beneficial to the BF and VAM, and improves the transmission and coverage of the wireless network. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a flow chart of a channel calibration method based on an antenna feeder system according to an embodiment of the present invention; FIG. 2 is a flowchart of another channel calibration method based on an antenna feeder system according to an embodiment of the present invention; A schematic diagram of a structure of a channel calibration device based on an antenna feeder system provided by an embodiment;

FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

FIG. 1 is a flowchart of a channel calibration method based on an antenna feeder system according to an embodiment of the present invention. Referring to Figure 1, the method includes:

The base station receives a reference detection signal sent by a UE (User Equipment) in multiple channels of the antenna feeder system;

102. The base station acquires a phase difference between a corresponding reference detection signal and the preset reference detection signal in the multiple channels according to the preset reference detection signal and the reference detection signal received in the multiple channels.

103. Obtain a first phase difference between the channels according to the phase difference.

It should be noted that the first phase difference may be an average value of a phase difference between a corresponding reference detection signal and the preset reference detection signal in the multiple channels, or may be any one of the multiple channels. The phase difference between the corresponding reference detection signal and the preset reference detection signal is not limited in this embodiment of the present invention.

104. The base station performs correlation measurement according to the preset reference sounding signal and the reference sounding signal sent by the UE, to obtain a second phase difference between the channels.

105. Obtain a static passive network phase calibration quantity according to the first phase difference and the second phase difference.

106. Calibrate a plurality of channels corresponding to channels that are reciprocal to the current channel according to the static passive network phase calibration amount.

Wherein, the calibration of the plurality of channels corresponding to the channel that is reciprocal to the current channel is based on the phase calibration amount of the static passive network, and phase-compensating the signals in the channel that is reciprocal with the current channel.

If the current channel is an uplink channel, the channel that is reciprocal to the channel should be a downlink channel. If the current channel is a downlink channel, the channel that is reciprocal to the channel should be an uplink channel. limited.

The method provided by the embodiment of the present invention receives the reference detection signal sent by the UE, and receives the reference detection signal. Dream ^ "Bao 1 ¥ loss ^ collar 仗 dream ^ Bao 1 ¥ loss near hit I k Θ have more than ear it, I big 4 and ^ ^ ^ mutual, to obtain the first phase difference between the channels and Performing a correlation measurement to obtain a second phase difference between the channels, thereby obtaining a static passive network phase calibration amount, and calibrating a plurality of channels passing through the air interface, so that the phase shift error of the wireless network and the incision of the feeder line are inaccurate, The elastic error of the joint is effectively compensated, and the phase difference between the channels is consistent, which is beneficial to the BF and VAM, and improves the transmission and coverage of the wireless network. Referring to FIG. 2, another embodiment of the present invention provides an antenna-based system. Channel calibration method. The method flow includes:

201: The base station receives the reference sounding signal sent by the UE through multiple channels of the antenna feeder system. In the embodiment of the present invention, the UE sends a reference sounding signal to the base station, where the reference sounding signal is known to the base station. When the base station receives the reference sounding signal sent by the UE through multiple channels of the antenna feeder system, the reference sounding signal received by the base station is a signal affected by environmental factors such as channel interference, and the phase may be changed.

In the embodiment of the present invention, the base station receives the reference sounding signal sent by the UE through the uplink channel as an example for description.

Preferably, in order to ensure that the active calibration and correlation measurement are not affected by the user's orientation and the signal-to-noise ratio of the signal received by the user, the UE may select SINR (Signal to Interference plus Noise Ratio). Noise ratio A UE that is greater than a preset threshold and is located in the normal direction of the pattern of the antenna feeder system.

202. The base station acquires a phase difference between a corresponding reference detection signal and the preset reference detection signal in the multiple channels according to the preset reference detection signal and the reference detection signal received in the multiple channels. In an example, since the attributes and structures of the channels in the channel have a certain influence on the signals transmitted therein, the phase of the signal transmitted by the base station and the signals transmitted by the base station are

The phase of the signal sent by the UE is inconsistent, thereby generating a phase difference. When the reference sounding signal is received through the first channel, it is matched with the preset reference sounding signal to obtain the phase generated by the first channel transmitting and receiving signal. To, when 3⁄413: Brother 2⁄4 接^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ a phase difference between a corresponding reference detection signal of the plurality of channels and the preset reference detection signal.

203, according to the phase difference, obtaining a first phase difference between the channels, performing 206;

In the embodiment of the present invention, the first phase difference is: a phase difference generated by the first channel transmit signal, a phase difference generated by the second channel transmit signal, and a corresponding reference detection signal of the subsequent multiple channels and the The average value of the phase difference between the preset reference detection signals may also be the phase difference generated by the first channel transmit signal, or the reference detection signal corresponding to any one of the multiple channels and the preset reference detection signal The phase difference between the embodiments is not limited in this embodiment of the present invention.

Step 201 - Step 203 is an active calibration process, which can be performed by RRU (Radio Remote

Unit, RF remote unit) is performed periodically.

204. Determine a polarization state of an uplink channel of the base station.

205, according to the determined polarization state, the base station performs correlation measurement according to the preset reference sounding signal and the reference sounding signal sent by the UE, to obtain a second phase difference between the channels;

In the embodiment of the present invention, after determining the polarization state, according to different polarization states of the channel, the correlation measurement may have the following conditions:

(1) When the channel is in the same column and different polarization state, the step 205 may include the following steps: calculating the coherent phase between the single-column cross-polarized channel vectors (hi, h2) by using the uplink multi-antenna receiving channel, angle_Crs=angle(hl )-angle(h2); where angle_Crs represents the coherence phase, angle(hl) and angle(h2) represent the phase of the column cross-polarization matrix subchannel vector; alternatively, the coherent phase can be calculated in the time or frequency domain For a UE (preferably a strong LOS (Line-of-sight)).

Further, when the calculation of the coherent phase is in the time domain, one or more effective paths with the highest energy are selected for calculation, and the average of the phases of the multipath is used as the second phase difference between each channel to be calibrated and the reference channel. The effective path is a transmission path between the two points on the transmitting and receiving antennas that must be able to look directly and without obstruction in the middle. When the calculation of the coherent phase is located in the frequency domain, the phase difference between the subcarriers after each subcarrier passing through the channel and before the subcarrier is transmitted is calculated, and the average of the phase differences of the plurality of subcarriers is taken as 1曰J's brother II?

(2) In another embodiment provided by the embodiment of the present invention, when the channel is in the same column and different polarization state, the step 205 may include the following steps: calculating a single column cross-polarized channel vector by using the uplink multi-antenna receiving channel (hl The coherence phase between, h2), angle_Crs=angle(hl*h2'); where angle_Crs represents the coherence phase, hi, h2 represents the measurement vector of each channel; alternatively, the coherent phase can be calculated in the time domain or The frequency domain is performed on a UE (preferably a strong LOS).

Further, when the calculation of the coherent phase is in the time domain, one or more effective paths with the highest energy are selected for calculation, and the average of the phases of the multipath is used as the second phase difference between each channel to be calibrated and the reference channel. When the calculation of the coherent phase is in the frequency domain, the phase difference between the subcarriers after each subcarrier passing through the channel and before the subcarrier is transmitted is calculated, and the average of the phase differences of the plurality of subcarriers is used as the second phase difference between the channels.

(3) In another embodiment provided by the embodiment of the present invention, when the channel is in the same polarization state, the step 205 may include the following steps: calculating the co-polarized channel vector by using the uplink multi-antenna receiving channel (hl, h2) Coherent phase between , h3, ...),

angle_Crs 1 =angle(h 1 *h2 ' );

angle_Crs2=angle(hl *h3, );

angle_Crs3=angle(hl*h4'); ... ,

Where angle_Crsl, angle_Crs2, angle_Crs3, etc. represent a phase of coherence, angle (hl*h2,), angle(hl*h3,), angle(hl*h4,), etc., indicating a phase corresponding to a coherent characteristic existing between the same polarization plane; Optionally, the calculation of the coherent phase may be performed on a certain UE in the time domain or the frequency domain (the UE must be a normal direction and a strong LOS UE or a UE farther from the antenna).

Further, when the calculation of the coherent phase is in the time domain, one or more effective paths with the highest energy are selected for calculation, and the average value of the phases of the multipath is used as the second phase difference between each channel to be calibrated and the reference channel. When the calculation of the coherent phase is in the frequency domain, the phase difference between each subcarrier passing through the channel and the subcarrier before the subcarrier is transmitted is calculated, and the average of the phase differences of the plurality of subcarriers is used as the second phase difference between the channels. (4) ^ 尽头施施施施施施施施施施施施施施施施施 , , , , , 205 205 205 205 205 205 205 205 205 205 205 205 , , , , , , , , , , , , , , , The coherence phase between , h2, h3, ...), angle_Crs 1 =angle(h 1 )-angle(h2) ,

angle_Crs2=angle(h 1 )-angle(h3 ) , angle_Crs3=angle(hl)-angle(h4), ... , angle_Crs represents the coherence phase, angle(hl), angle(h2), angle(h3), angle (h4) and the like represent the phase of the single-column cross-polarization matrix channel vector; if necessary, the calculation of the coherent phase may be for a certain UE in the time domain or the frequency domain (the UE must be a normal direction and a strong LOS UE or a distance antenna) Farther UE).

Further, when the calculation of the coherent phase is in the time domain, one or more effective paths with the highest energy are selected for calculation, and the average of the phases of the multipath is used as the second phase difference between each channel to be calibrated and the reference channel. When the calculation of the coherent phase is located in the frequency domain, the phase difference between each subcarrier passing through the channel and the subcarrier before the transmission subcarrier is calculated, and the average of the phase differences is taken as the second phase difference between the channels.

206. Obtain a static passive network phase calibration quantity according to a first phase difference between the channels and a second phase difference between the channels measured by the correlation.

In the embodiment of the present invention, the static passive network phase calibration amount is equal to a difference between the second phase difference between the channels obtained by the correlation measurement and the first phase difference between the channels.

Based on the example of 205, when the channel is subjected to the same column polarization calibration, the coherent phase is calculated by 205, and the average value in the time domain or the frequency domain is calculated, and this value is used as the second phase difference between the channels obtained by the correlation measurement. And calculating, by 203, a first phase difference between the channels, and calculating a difference between the first phase difference and the second phase difference to obtain a static passive network phase calibration amount;

When the channel is subjected to the same column polarization calibration, the coherent phase is calculated by 205, and the average value in the time domain or the frequency domain is calculated, and this value is used as the second phase difference between the channels obtained by the correlation measurement, and is calculated by 203. The first phase difference between the channels is calculated by calculating the difference between the first phase difference and the second phase difference to obtain a static passive network phase calibration amount.

207. Calibrate a plurality of channels corresponding to channels that are reciprocal to the current channel according to the static passive network phase calibration amount. ^反反明3⁄4^ Ι甲, 3⁄4 ^后田上^ 接^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Phase anti-compensation.

It should be noted that the calibration scheme is also applicable to the calibration between the same polarization of the conventional four-channel antenna feeder system and the eight-channel antenna feeder system.

The method provided by the embodiment of the present invention, by receiving a reference detection signal sent by the UE, matching the received reference detection signal with a preset reference detection signal to obtain a phase difference between the two, thereby obtaining a first phase difference between the channels. And the second phase difference between the channels obtained by the correlation measurement, thereby obtaining the static passive network phase calibration amount, and calibrating the multiple channels passing through the air interface, so that the phase shift error of the wireless network and the incision of the feeder line are inaccurate The elastic error of the joint is effectively compensated, and the phase difference between the channels is consistent, which is beneficial to the BF and VAM, and improves the transmission and coverage of the wireless network. Further, the calibration quantity obtained by using the correlation quantity measurement and the first phase difference between the received reference detection signal and the preset reference detection signal is less affected by the environment and temperature, and is substantially unchanged, and can be used as Static parameters for calibration. FIG. 3 is a schematic structural diagram of a channel calibration apparatus based on an antenna feeder system according to an embodiment of the present invention. Referring to FIG. 3, the device includes:

The receiving module 301 is configured to receive a reference sounding signal sent by the UE in multiple channels of the antenna feeder system;

The phase difference acquisition module 302 is configured to acquire, according to the preset reference detection signal and the reference detection signal received in the multiple channels, between the corresponding reference detection signal and the preset reference detection signal in the multiple channels. Phase difference

a first phase difference acquisition module 303, configured to obtain a first phase difference between the channels according to the phase difference;

The second phase difference obtaining module 304 is configured to perform correlation measurement according to the preset reference sounding signal and the reference sounding signal sent by the UE, to obtain a second phase difference between the channels; Static ^ especially \»] ?f目互仪^重I big 4 and narrowly disgusted 3U5, 亇 ^ ^ after the younger brother? f eyes to each other ^^ / Γ also the second phase difference, obtain static passive network phase Calibration amount

The channel calibration module 306 is configured to calibrate multiple channels corresponding to channels that are reciprocal to the current channel.

Optionally, the correlation measurement comprises coherent phase calculation between polarized channels in the same column polarization calibration; or coherent phase calculation between polarized channels in the same polarization calibration.

Optionally, the coherent phase calculation is performed in a time domain or a frequency domain.

Optionally, the UE is a UE whose signal to interference plus noise ratio SINR is greater than a preset threshold and located in a normal direction of a pattern of the antenna feeder system.

Optionally, the static passive network phase calibration amount is equal to a difference between a channel-to-channel phase difference obtained by the correlation measurement and a phase difference between the inner calibration channels.

In summary, the apparatus provided by the embodiment of the present invention compares the received reference detection signal with a preset reference detection signal by receiving a reference detection signal sent by the UE, so as to obtain a phase difference between the two, thereby obtaining a channel. The first phase difference between the first phase difference and the second phase difference between the channels obtained by the correlation measurement, thereby obtaining the static passive network phase calibration amount, and calibrating the plurality of channels passing through the air interface to make the phase shift error of the wireless network The inaccurate cutting of the feeder and the elastic error of the joint are effectively compensated, and the phase difference between the channels is consistent, which is beneficial to the BF and VAM, and improves the transmission and coverage of the wireless network.

It should be noted that: the channel calibration device based on the antenna feeder system provided by the above embodiment is only used for the division of the above functional modules when performing the channel calibration based on the antenna feeder system. In practical applications, the channel calibration device may be used as needed. The above function assignment is performed by different functional modules, that is, the internal structure of the base station is divided into different functional modules to complete all or part of the functions described above. In addition, the antenna calibration system-based channel calibration device provided by the above embodiment is the same as the antenna-based system-based channel calibration method embodiment, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again. FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention. Referring to Figure 4, the device Q^: ^标, 反翁4ϋ2, anger 4ϋ3 口4ϋ4, the user/Γ is also connected, the transmitter 402 and the memory 403 are respectively connected to the processor 404, and the memory 403 stores the program code. ,

The receiver 401 is configured to receive a reference detection signal sent by the UE in multiple channels of the antenna feeder system;

The processor 404 is configured to invoke the program code, and perform the following operations: acquiring a corresponding reference detection signal and the corresponding one of the multiple channels according to the preset reference detection signal and the reference detection signal received in the multiple channels Determining a phase difference between the reference detection signals; obtaining a first phase difference between the channels according to the phase difference; performing correlation measurement according to the preset reference detection signal and the reference detection signal sent by the UE, to obtain a channel a second phase difference between the two; a static passive network phase calibration amount is obtained according to the first phase difference and the second phase difference; and a channel that is reciprocal to the current channel according to the static passive network phase calibration amount The corresponding multiple channels are calibrated.

Optionally, the static passive network phase calibration amount is equal to a difference between a channel-to-channel phase difference obtained by the correlation measurement and a phase difference between the inner calibration channels. A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. A ^ r, j ^, household / rif's it bamboo 1 again, narrow, close, clever ^ 3⁄4 order, ^ inside the protection range.

Claims

Right to ice

1. A channel calibration method based on the antenna system, characterized in that the method includes: the base station receives reference detection signals sent by the user equipment UE in multiple channels of the antenna system; the base station detects according to the preset reference signal and the reference detection signals received in the multiple channels, and obtain the phase difference between the corresponding reference detection signals in the multiple channels and the preset reference detection signal;

According to the phase difference, obtain a first phase difference between channels;

The base station performs correlation measurement based on the preset reference sounding signal and the reference sounding signal sent by the UE to obtain the second phase difference between channels;

According to the first phase difference and the second phase difference, a static passive network phase calibration amount is obtained; according to the static passive network phase calibration amount, multiple channels corresponding to channels that are reciprocal with the current channel are calibrated. .

2. The method according to claim 1, characterized in that, the correlation measurement includes the calculation of coherent phases between polarization channels in co-polarization calibration; or, the coherent phase between polarization channels in co-polarization calibration. calculate.

3. The method according to claim 2, characterized in that the coherent phase calculation is performed in the time domain or frequency domain.

4. The method according to claim 1, characterized in that the UE is a UE whose signal to interference plus noise ratio SINR is greater than a preset threshold and is located in the normal direction of the pattern of the antenna system.

5. The method according to claim 1, characterized in that, the static passive network phase calibration amount is equal to the difference between the inter-channel phase difference obtained by correlation measurement and the internally calibrated inter-channel phase difference.

6. A channel calibration device based on an antenna system, characterized in that the device includes: a receiving module for receiving reference detection signals sent by the UE in multiple channels of the antenna system; a phase difference acquisition module for Obtain the phase difference between the corresponding reference detection signals in the plurality of channels and the preset reference detection signal according to the preset reference detection signal and the reference detection signals received in the plurality of channels;

The first phase difference acquisition module is used to obtain the first phase difference between channels according to the phase difference; the second phase difference acquisition module is used to obtain the first phase difference between channels according to the preset reference detection signal and the reference detection signal sent by the UE. Correlation measurement to obtain the second phase difference between channels;

A static passive network phase calibration quantity module, configured to obtain a static passive network phase calibration quantity according to the first phase difference and the second phase difference;

The channel calibration module is used to calibrate multiple channels corresponding to the reciprocal channel of the current channel.

7. The device according to claim 6, characterized in that, the correlation measurement includes the calculation of the coherent phase between polarization channels in the co-polarization calibration; or, the coherent phase between the polarization channels in the co-polarization calibration. calculate.

8. The device according to claim 7, characterized in that the coherent phase calculation is performed in the time domain or frequency domain.

9. The apparatus according to claim 6, wherein the UE is a UE with a signal-to-interference-plus-noise ratio (SINR) greater than a preset threshold and located in the normal direction of the pattern of the antenna system.

10. The device according to claim 6, wherein the static passive network phase calibration amount is equal to the difference between the inter-channel phase difference obtained by correlation measurement and the internally calibrated inter-channel phase difference.

11. A base station, characterized in that the base station includes: a receiver, a transmitter, a memory and ¾ ^ , so the connection ^ ^ , the connection ^^ ^ and the connection ^^ ^ respectively ^ the connection ¾ ^ the connection, the memory stores the program code,

The receiver is used to receive the reference detection signal sent by the UE in multiple channels of the antenna system; the processor is used to call the program code to perform the following operations: According to the preset reference detection signal and the Based on the reference detection signals received in multiple channels, obtain the phase difference between the corresponding reference detection signals in the multiple channels and the preset reference detection signal; according to the phase difference, obtain the first phase difference between channels ; According to the preset reference detection signal and the reference detection signal sent by the UE, perform correlation measurement to obtain the second phase difference between channels; According to the first phase difference and the second phase difference, obtain the static passive Network phase calibration quantity; Calibrate multiple channels corresponding to channels that are reciprocal with the current channel according to the static passive network phase calibration quantity.