WO2013097486A1

WO2013097486A1 - Method and device for receiving signal

Info

Publication number: WO2013097486A1
Application number: PCT/CN2012/081209
Authority: WO
Inventors: 刘娟维; 皇甫祯; 杨东良; 山海丰
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-12-31
Filing date: 2012-09-10
Publication date: 2013-07-04
Also published as: CN103188009B; CN103188009A

Abstract

Disclosed are a method and a device for receiving a signal. In the method, a base band unit (BBU) determines a channel to be configured as enabled according to the calibrated gain obtained during the procedure of antenna calibration; BBU informs a remote radio unit (RRU) of the result determined so that the RRU uses the enabled channel to receive the signal. According to the technical solution provided by the present invention, the ability of the antenna for beam-forming is increased, the uniformity of channels is improved, and the accuracy of gain calibration in the uplink channel of the RRU is increased. The antenna calibration is triggered by changing the state of the channel or by changing the state of the channel alert, thereby improving the uniformity of phase and amplitude of the channels. The channel regarded as unqualified during the calibration is reported and alerted to the network management sub-system so that the possibility of promptly repairing the network is guaranteed.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a signal receiving method and apparatus. BACKGROUND A Smart Antenna System (SAS) is composed of an antenna array, a multi-channel transceiver, and a spatial domain signal processing module. The principle of the smart antenna is to direct the radio signal to a specific direction to generate a spatial directional beam, so that the main beam of the antenna is aligned with the direction of arrival of the user signal (Direction of Arrival, referred to as DOA), and the side lobes or nulls are aligned with the arrival direction of the interference signal. Achieve the full and efficient use of mobile user signals and delete or suppress interference signals. Since the channel and the phase difference are introduced due to the non-ideality of the circuit, the channel rectification system is required to compensate for the inconsistency of the RRU transceiver channel. In the actual transmission, the complete channel reciprocity includes not only the reciprocity of the radio channel, but also the reciprocity of the radio channel between the antenna port and the baseband unit (BBU). In order to enhance the reciprocity of the RF channel, the TD_LTE base station usually adopts antenna calibration on the system base station side. The subsystem involved in antenna calibration in the related art may include: a network pipe system, a BBU, and a Remote Radio Unit (RRU), wherein the network pipe system is configured to manage the BBU and the RRU, and is capable of initiating an antenna. The BBU may further include: a calibration management module and a baseband calibration module, wherein the calibration management module is responsible for calibration parameters (including RRU antenna bitmaps, etc.) configuration, calibration process management, communication between the BBU and the RRU, and The alarm is reported on the pipe system; the baseband calibration module is mainly responsible for the calibration process between the baseband and the RRU (including the start of the calibration by the control word, the calibration sequence sent to the RRU, the end of the calibration by the control word, etc.). The RRU is mainly responsible for responding to the control word indication sent by the BBU, receiving the calibration sequence sent by the BBU, and processing the calibration process through the calibration network. In the TD_LTE base station, the antenna calibration technique in the related art includes the following steps: Step 1: The calibration trigger source initiates antenna calibration to the calibration management module, (the antenna calibration trigger source includes: network pipe system trigger, RRU trigger, BBU cycle trigger), The calibration management module notifies the RRU and baseband calibration module that antenna calibration begins, respectively. Step 2: The baseband calibration module receives the calibration request, and notifies the RRU to start calibration by using the calibration control word. It performs antenna calibration between the calibration sequence and the RRU. After the calibration is completed, the baseband calibration module notifies the RRU of the bottom calibration by the calibration control word. Step 3: The baseband calibration module notifies the calibration management module that the antenna calibration is completed. The antenna calibration module informs the RRU that the high-level software antenna calibration is complete. However, the BBU side antenna calibration method in the related art has the following drawbacks and disadvantages: During the calibration process, the channel that fails to be calibrated reduces the beamforming performance of the antenna, and the channel consistency is deteriorated. Channel consistency (including phase consistency and amplitude consistency) is affected by channel status changes or alarm status changes (generation or disappearance). If the channel status changes or the channel alarm status changes, the BBU needs to adjust the channel consistency through antenna calibration. However, the calibration technique in the related art does not achieve this requirement. SUMMARY OF THE INVENTION The present invention provides a signal receiving method and apparatus for solving at least the problem that the channel failed to be calibrated in the calibration process of the BBU side antenna in the related art reduces the beamforming performance of the antenna and deteriorates the consistency of the channel. According to an aspect of the invention, a signal receiving method is provided. The signal receiving method according to the present invention includes: the BBU determines a channel to be set to be enabled according to the calibration gain acquired by the antenna calibration processing flow; the BBU notifies the RRU of the determined result, so that the RRU receives the signal using the enabled channel. In the above method, after receiving the notification message of the channel state change or the channel alarm change from the RRU, the BBU triggers the antenna calibration process. In the above method, the BBU obtains the calibration gain according to the antenna calibration processing flow, and determines the channels that need to be set to be enabled: Step A: The BBU obtains the calibration gain through the antenna calibration processing flow; Step B: The BBU calculates and obtains according to the calibration gain of each channel. Channel calibration gain mean; Step C: The BBU compares the difference between the calibration gain of each channel and the channel calibration gain average with a preset first threshold; Step D: The BBU compares the calibration gain of each channel in multiple channels with The difference between the channel calibration gain averages of the multiple channels is compared with the first threshold respectively. If there is a channel whose difference is greater than or equal to the first threshold, the channel greater than or equal to the first threshold is set to be disabled, if not present. Steps E: The BBU determines that the channel whose difference is less than the first threshold is the enabled channel. Step F: If there is a channel set to not enabled, the baseband calibration module follows the path that is greater than or equal to the first threshold. Updated calibration channel bitmap, re-initiate antenna calibration, return to step A, otherwise baseband calibration ends Step G; Step G: The base band calibration module returns the result to the calibration management module calibration, calibration management module configured to update the calibration channel bitmap to the RRU. In the above method, the step G further includes: the number of channels in which the BBU statistical difference is greater than or equal to the first threshold; the number of channels that the BBU will count will be compared with a preset second threshold, if greater than, An alarm is issued. In the above method, the BBU notifies the RRU of the determined result that the BBU sends a bitmap message for updating the antenna calibration channel to the RRU; the BBU receives the response message of the bitmap message from the RRU. In the above method, when the RRU receives the signal by using the enabled channel, if it is the uplink calibration, the method further includes: the RRU receiving the channel gain compensation difference corresponding to each channel in the channel that needs to be set to be enabled from the BBU; Whether the difference is greater than a preset third threshold; for a channel whose corresponding difference is greater than the third threshold, the RRU adjusts the gain of the channel according to the corresponding difference; the RRU determines whether the number of adjustments is less than a preset number of times; , the RRU re-initiates the antenna calibration process. According to another aspect of the present invention, a signal receiving apparatus is provided. A signal receiving apparatus according to the present invention includes: a BBU; the BBU includes: a baseband calibration module configured to determine a calibration gain required according to an antenna calibration processing flow, and a calibration management module configured to control antenna calibration The process notifies the RRU of the calibrated result so that the RRU receives the signal using the enabled channel. In the above apparatus, the BBU further includes: a first receiving module, configured to trigger an antenna calibration process after receiving a notification message of a channel state change or a channel alarm change from the RRU. In the above apparatus, the baseband calibration module includes: an acquisition unit configured to acquire a calibration gain according to an antenna calibration processing flow; a calculation unit configured to calculate a channel calibration gain mean according to a calibration gain of each channel; and a comparison unit configured to The difference between the channel calibration gain and the channel calibration gain mean is compared with a preset first threshold; the execution unit is set to compare the calibration gain of each channel of the multiple channels with the channel calibration gain mean of the multiple channels The values are respectively compared with the first threshold. If there is a channel whose difference is greater than or equal to the first threshold, the channel greater than or equal to the first threshold is set to not enable the channel, the antenna calibration is re-initiated, and the acquiring unit is triggered, if it does not exist. a channel having a difference greater than or equal to the first threshold, a trigger determining unit; and a determining unit configured to determine that the channel whose difference is less than the first threshold is an enabling channel. The calibration result is returned to the calibration management module. In the above apparatus, the calibration management module includes: a statistical unit, configured to set a number of channels whose statistical difference is greater than or equal to the first threshold; and an alarm unit, set to count the number of channels to be compared with a preset number The two thresholds are compared, and if they are greater, an alarm is issued. For the uplink calibration, the foregoing apparatus further includes: an RRU; the RRU includes: a second receiving module, configured to receive a difference corresponding to each channel in the channel that needs to be set to be enabled from the BBU; and the first determining module is configured to determine Whether the corresponding difference is greater than a preset third threshold; the adjusting module is configured to adjust the gain of the channel according to the corresponding difference for the channel whose corresponding difference is greater than the third threshold; the second determining module is set to determine Whether the number of times of adjustment is less than a preset number of times; the initiating module is configured to re-initiate the antenna calibration processing flow when the output of the second judging module is YES. In the above apparatus, the calibration management module includes: a sending unit configured to send a bitmap message for updating the antenna calibration channel to the RRU; and a receiving unit configured to receive a response message of the bitmap message from the RRU. According to the present invention, the BBU is used to determine the channel to be enabled according to the calibration gain obtained by the antenna calibration process, and the determined result is notified to the RRU, so that the RRU receives the signal using the enabled channel, and the BBU in the related art is solved. During the side antenna calibration process, the channel that fails to be calibrated reduces the beamforming performance of the antenna, which makes the channel uniformity worse, thereby improving the beamforming capability of the antenna calibration, enhancing the channel consistency, and improving the RRU uplink. Accuracy of channel gain calibration, triggering antenna calibration by channel state change or channel alarm state change to improve the phase and amplitude consistency of the channel, reporting the network management subsystem to the channel that fails the calibration, ensuring timely network The effect of repairing the possibility. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a flow chart of a signal receiving method according to an embodiment of the present invention; FIG. 2 is a flow chart of adjusting a channel gain by a RRU corresponding to a difference value of each channel in an enabled channel according to a preferred embodiment of the present invention. 3 is a flow chart of a signal receiving method according to a preferred embodiment of the present invention; FIG. 4 is a block diagram showing the structure of a signal receiving apparatus according to an embodiment of the present invention; and FIG. 5 is a structure of a signal receiving apparatus according to a preferred embodiment of the present invention. block diagram. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. 1 is a flow chart of a signal receiving method according to an embodiment of the present invention. As shown in FIG. 1, the method mainly includes the following processing: Step S102: The BBU determines the channel to be set to be enabled according to the calibration gain obtained by the antenna calibration processing flow. Step S104: The BBU notifies the RRU of the determined result, so that the RRU receives the signal by using the enabled channel. In the related art, in the calibration process of the BBU side antenna, the channel that fails to be calibrated reduces the beamforming performance of the antenna, resulting in poor channel consistency. In the method shown in FIG. 1, the BBU determines the channel to be set to be enabled according to the calibration gain obtained by the antenna calibration process, and notifies the RRU of the determined result, so that the RRU receives the signal using the enabled channel, thereby improving The beamforming capability of the antenna calibration enhances channel consistency. It should be noted that the baseband calibration module can carry the calibration result, the channel gain compensation difference, and the updated calibration channel information after the calibration is completed, and notify the calibration management module that the antenna calibration is completed. After the calibration management module receives the antenna calibration response, if it is an upstream calibration, configure the channel gain compensation difference to the RRU and configure the updated calibration channel information to the RRU. Preferably, before performing step S102, the following processing may be further included: after receiving the notification message of the channel state change or the channel alarm change from the RRU, the BBU triggers the antenna calibration process, that is, adds a calibration trigger source. The specific embodiment of the present invention adds another channel state change or channel alarm change based on the three calibration trigger sources of the antenna calibration initiated by the existing network pipe system, the BBU periodic antenna calibration, and the RRU initiated antenna calibration. The triggering antenna calibration trigger source, wherein the channel state change mainly includes: whether the current channel is available; the channel alarm changes mainly include: channel standing wave ratio alarm, channel over temperature alarm, and the like. The BBU receives the channel status change of the RRU or the notification message of the channel alarm change to trigger the antenna calibration process. Preferably, in step S102, the BBU determines that the channel that needs to be set to be enabled according to the calibration gain obtained by the calibration process may include the following processing steps: Step A: The BBU obtains the calibration gain through the antenna calibration process flow; Step B: The BBU according to each The calibration gain calculation of the channel obtains the channel calibration gain mean value; Step C: The BBU compares the difference between the calibration gain of each channel and the channel calibration gain average with a preset first threshold value; Step D: The BBU will be in multiple channels The difference between the calibration gain of each channel and the channel calibration gain mean of the multiple channels is compared with the first threshold respectively, and if there is a channel whose difference is greater than or equal to the first threshold, it will be greater than Or the channel equal to the first threshold is set to be disabled. If there is no channel whose difference is greater than or equal to the first threshold, step E is performed; Step E: The BBU determines that the channel whose difference is smaller than the first threshold is the enabled channel; F: If there is a channel set to not enabled, the baseband calibration module re-initiates the antenna calibration according to the updated calibration channel bitmap, and returns to step A. Otherwise, the baseband calibration module returns the calibration result, the baseband calibration ends, and the calibration result is completed. Return to the calibration management module; Step G: The calibration management module receives the calibration result returned by the baseband calibration module, and configures the calibration channel bitmap to

In a preferred embodiment, after the BBU acquires the calibration gain for each channel, the difference between each channel calibration gain and the channel calibration gain mean is calculated to obtain a calibration gain difference for each channel. When the channel calibration gain difference exceeds the preset channel gain difference threshold (corresponding to the above first threshold), the channel calibration is considered to be unqualified. Then, the corresponding channel is set to not enabled, the calibration channel information is updated, and the antenna calibration is re-initiated according to the updated calibration channel information, wherein the channel that is set to be disabled is not calibrated during the re-initiation of the antenna calibration, and the above is repeated. The process does not exist in the calibration information for the channel that failed the calibration. When the antenna calibration trigger source initiates the antenna calibration again, the baseband calibration module begins calibration based on the initially configured channel information. Of course, the above calculation process is only a preferred calculation method of the present invention. In the simplest manner of the present invention, the difference between the calibration gain of each channel and the channel calibration gain average can be respectively compared with the preset first threshold by the BBU. Only one comparison is performed, that is, the channel whose difference is smaller than the first threshold is determined to be the enable channel; or, when calculating the difference, the channel calibration gain mean is not used, but the mean square value of each channel gain is selected as the difference value. Object. In a preferred implementation process, the foregoing step G may further include the following processing:

(1) the number of channels whose BBU statistical difference is greater than or equal to the first threshold;

(2) The number of channels that the BBU will count will be compared with a preset second threshold. If it is greater than, the alarm will be issued. In a preferred embodiment, during the process of performing an antenna calibration, the BBU needs to count the number of channels that are not enabled, and the number of channels that are not enabled is greater than a preset value (corresponding to the second threshold. When an alarm is sent to the NMS to ensure the possibility of timely network repair. For example, in an 8-channel RRU, if the number of unenabled channels exceeds 4, an alarm is sent to the network management system to facilitate timely repair. Preferably, in step S104, when the RRU receives the signal using the enabled channel, if it is an uplink calibration, the following processing may also be included:

(1) The RRU receives the channel gain compensation difference corresponding to each channel in the channel that needs to be set to be enabled in the BBU; (2) the RRU determines whether the corresponding channel gain compensation difference is greater than a preset third threshold;

(3) For a channel whose corresponding channel gain compensation difference is greater than a third threshold, the RRU adjusts the gain of the channel according to the corresponding channel gain compensation difference;

(4) The RRU determines whether the number of adjustments is less than a preset number of times;

(5) If yes, the RRU re-initiates the antenna calibration process. In a specific embodiment of the invention, after the antenna calibration process is completed, the calibration management module configures the uplink channel gain compensation to the RRU. The RRU adjusts the channel gain through the channel gain compensation configuration to achieve the purpose of adjusting the scaling gain (corresponding to the third threshold), wherein the scaling gain is preset, and the closer the channel gain of the RRU is to the scaling gain, the antenna The better the calibration results. The preferred implementation of the RRU adjustment channel gain is further described below in conjunction with FIG. 2 is a flow diagram of an RRU adjusting channel gain by a difference corresponding to each channel in an enabled channel, in accordance with a preferred embodiment of the present invention. As shown in FIG. 2, the method may include the following processing steps: Step S202: The baseband calibration module of the BBU completes the antenna calibration processing flow; Step S204: If it is an uplink calibration, the calibration management module acquires the channel gain compensation difference and is configured to the RRU; Step S206: After receiving the uplink channel gain difference compensation configuration of the BBU, the RRU compares whether the difference corresponding to each channel in the enabled channel is greater than a preset calibration gain. Step S208: If greater than, the RRU is based on the corresponding The difference adjusts the gain of the channel; otherwise, the process goes to step S214, and the process ends; Step S210: Determine whether the number of adjustments is less than a preset number of adjustments (for example: 3 times); Step S212: If less than, the RRU re-initiates the antenna calibration process Flow, go to step S202, while adjusting the counter plus 1; otherwise, continue to step S214; Step S214: The process ends. Preferably, in step S104, the BBU notifying the RRU of the determined result may include the following processing:

(1) The BBU sends a bitmap message to the RRU to update the antenna calibration channel;

(2) The BBU receives a response message from the bitmap message of the RRU. The above preferred embodiment will be further described below in conjunction with FIG. 3 is a flow chart of a signal receiving method in accordance with a preferred embodiment of the present invention. As shown in FIG. 3, taking an 8-channel RRU as an example, the method includes the following processing steps: Step S302: The calibration management module initiates an antenna calibration request to the baseband calibration module, and the baseband calibration module starts calibration; Step S304: Baseband calibration The module is in During the calibration process, the calibration gain of each channel is obtained; Step S306: Calculate the difference between the calibration gain of each channel and the average of the 8 channel calibration gains to obtain the calibration gain difference of each channel; Step S308: Determine each channel Whether the calibration gain exceeds the preset channel gain difference threshold. If it is exceeded, it is considered that the channel calibration fails, then step S310 is continued; if not, then go to step S314; step S310: set the channel corresponding to the preset channel gain difference threshold to be disabled; step S312: After the eight channels are judged, the baseband calibration module re-initiates the antenna calibration process according to the updated calibration channel information, and proceeds to step S302; until all the enabled channels are successfully calibrated, the baseband calibration module responds to the calibration management module calibration end response, in response And carrying 8 channels of calibration difference results, updated calibration channel information, calibration results and other information; Step S314: The baseband calibration module reports the calibration result to the calibration management module; Step S316: The calibration management module compares whether the number of failed calibration channels is greater than the calibration a channel failure threshold, if the channel that fails the calibration exceeds the calibration failure channel threshold, proceeding to step S316; if not, proceeding to step S318; step S318: reporting the alarm to the network pipe system; Step S320: The calibration management module configures the updated calibration channel information to the RRU, and the calibration ends; after the RRU receives the calibration channel information configuration, configures the current calibration channel information, and simultaneously performs calibration channel information configuration response, and the calibration management module receives the update calibration. After the channel information is acknowledged, the process ends. 4 is a block diagram showing the structure of a signal receiving apparatus according to an embodiment of the present invention. As shown in FIG. 4, the signal receiving apparatus mainly includes: a BBU 10; the BBU 10 may include: a baseband calibration module 100 configured to determine a channel to be set to be enabled according to a calibration gain acquired according to an antenna calibration processing flow; and a calibration management module 102 , set to notify the RRU of the determined result so that the RRU receives the signal using the enabled channel. In the related art, in the calibration process of the BBU side antenna, the channel that fails to be calibrated reduces the beamforming performance of the antenna, resulting in poor channel consistency. In the apparatus shown in FIG. 4, the baseband calibration module 100 determines the channel that needs to be set to be enabled according to the calibration gain acquired by the antenna calibration process flow; the calibration management module 102 notifies the radio frequency remote unit RRU of the determined result to Enables the RRU to receive signals using the enabled channels. In addition, the antenna beamforming capability is improved, and the channel consistency is enhanced. Preferably, as shown in FIG. 5, in the foregoing apparatus, the BBU may further include: a first receiving module 104, configured to trigger an antenna calibration process after receiving a notification message of a channel state change or a channel alarm change from the RRU. . Preferably, as shown in FIG. 5, the baseband calibration module 100 may further include: an acquisition unit (not shown) configured to obtain a calibration gain according to an antenna calibration process flow; a calculation unit (not shown) Set to obtain the channel calibration gain mean according to the calibration gain of each channel; the comparison unit (not shown) is set to compare the difference between the calibration gain of each channel and the channel calibration gain average with the preset first The threshold is compared; the execution unit (not shown) is set to compare the difference between the calibration gain of each channel of the plurality of channels and the channel calibration gain mean of the plurality of channels, respectively, with the first threshold, if there is a difference a channel that is greater than or equal to the first threshold, sets a channel that is greater than or equal to the first threshold to a channel that is not enabled, triggers an acquisition unit, and if there is no channel whose difference is greater than or equal to the first threshold, triggers the determining unit; and determines the unit (not shown), the channel set to determine that the difference is less than the first threshold is the enable channel. Preferably, as shown in FIG. 5, the calibration management module 102 may include: a statistical unit (not shown) configured to set the number of channels whose statistical difference is greater than or equal to the first threshold; Shown), the number of channels set to be counted will be compared with a preset second threshold, and if it is greater, an alarm is issued. Preferably, as shown in FIG. 5, the foregoing apparatus may further include: an RRU 20; the RRU 20 may include: a second receiving module 200 configured to receive a difference corresponding to each channel in the channel that needs to be set to be enabled from the BBU; a determining module 202, configured to determine whether the corresponding difference is greater than a preset third threshold; the adjusting module 204 is configured to adjust the gain of the channel according to the corresponding difference for the channel whose corresponding difference is greater than the third threshold; The second determining module 206 is configured to determine whether the number of adjustments is less than a preset number of times; the initiating module 208 is configured to re-initiate the antenna calibration processing flow when the output of the second determining module is YES. Preferably, as shown in FIG. 5, the calibration management module 102 may further include: a sending unit (not shown) configured to send a bitmap message for updating the antenna calibration channel to the RRU; a receiving unit (not shown) Out), set to receive a response message from the bitmap message of the RRU. From the above description, it can be seen that the present invention achieves the following technical effects: Through the channel adaptive calibration process, the beamforming capability of the antenna is enhanced, and the channel consistency is improved. The antenna calibration is triggered by channel state change or channel alarm change to improve the phase and amplitude consistency of the channel. The channel gain difference configuration improves the accuracy of the RRU uplink channel gain calibration. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A signal receiving method, comprising:

The baseband processing unit BBU determines the channel to be set to enable according to the calibration gain obtained by the antenna calibration processing flow;

The BBU notifies the RRU of the determined result to cause the RRU to receive signals using the enabled channel.

2. The method according to claim 1, wherein the method further comprises:

The BBU triggers an antenna calibration process after receiving a notification message from a channel state change or a channel alarm change of the RRU.

The method according to claim 1, wherein the BBU obtains a calibration gain according to an antenna calibration process, and determines that the channel that needs to be set to be enabled includes:

Step A: The BBU obtains a calibration gain by using the antenna calibration process flow. Step B: The BBU calculates a channel calibration gain average according to a calibration gain of each channel. Step C: The BBU compares the calibration gain of each channel with the Comparing the difference between the channel calibration gain mean values and a preset first threshold value;

Step D: The BBU compares a difference between a calibration gain of each channel of the multiple channels and a channel calibration gain mean of the multiple channels with the first threshold, respectively, if the difference is greater than or equal to a channel of the first threshold, the channel greater than or equal to the first threshold is set to be disabled, if there is no channel whose difference is greater than or equal to the first threshold, step E is performed;

Step E: The BBU determines that the channel whose difference is less than the first threshold is an enabled channel. Step F: If there is a channel set to not enabled, the baseband calibration module restarts the antenna calibration according to the updated calibration channel bitmap. , return to step A, otherwise, the baseband calibration module returns the calibration result, the baseband calibration ends, and the calibration result is returned to the calibration management module;

Step G: The calibration management module receives the calibration result returned by the baseband calibration module and configures the calibration channel bitmap to the RRU.

4. The method according to claim 3, wherein the step G further comprises:

The number of channels in which the BBU statistical difference is greater than or equal to the first threshold; The BBU compares the number of the statistical channels with a preset second threshold, and if it is greater, sends an alarm.

The method according to claim 1, wherein, if it is an uplink calibration, when the RRU receives the signal by using the enabled channel, the method further includes:

The RRU receives a difference corresponding to each channel in the channel that needs to be set to be enabled from the BBU;

Determining, by the RRU, whether the corresponding difference is greater than a preset third threshold; and for the channel whose corresponding difference is greater than the third threshold, the RRU adjusts a channel gain according to the corresponding difference ;

Determining, by the RRU, whether the number of adjustments is less than a preset number of times;

If so, the RRU re-initiates the antenna calibration process flow.

The method according to claim 3, wherein the BBU notifying the RRU of the determined result includes:

Sending, by the BBU, a bitmap message that updates an antenna calibration channel to the RRU;

The BBU receives a response message from the bitmap message of the RRU.

7. A signal receiving device, the device comprising: a baseband processing unit BBU;

The BBU includes:

The baseband calibration module is set to determine the channel to be set to enable based on the calibration gain obtained from the antenna calibration process;

A calibration management module is configured to control the antenna calibration process to notify the RRU of the calibrated result such that the RRU receives the signal using the enabled channel.

8. The device according to claim 7, wherein the BBU further comprises:

The first receiving module is configured to trigger an antenna calibration process after receiving a notification message of a channel state change or a channel alert change from the RRU.

9. The apparatus according to claim 7, wherein the baseband calibration module comprises:

Acquiring unit, configured to obtain a calibration gain according to an antenna calibration processing flow;

a calculation unit, configured to calculate a channel calibration gain average according to a calibration gain of each channel; a comparing unit, configured to compare a difference between a calibration gain of each channel and the channel calibration gain mean with a preset first threshold;

An execution unit, configured to compare a difference between a calibration gain of each of the plurality of channels and a channel calibration gain mean of the plurality of channels, respectively, with the first threshold, if the difference is greater than or equal to the a channel of the first threshold, the channel greater than or equal to the first threshold is set as a non-enable channel, and antenna calibration is re-initiated, and the acquiring unit is triggered, if there is no difference greater than or equal to the first threshold Channel, trigger determination unit;

The determining unit is configured to determine that the channel whose difference is smaller than the first threshold is an enabling channel. The calibration result is returned to the calibration management module.

The device according to claim 9, wherein the calibration management module comprises:

a statistical unit, configured to count the number of channels whose statistical difference is greater than or equal to the first threshold; and an alarm unit, configured to compare the number of the statistical channels with a preset second threshold, if greater than , an alert is issued.

The device according to claim 9, wherein the device further comprises: the RRU;

The RRU includes:

a second receiving module, configured to receive a difference corresponding to each channel in the channel that needs to be set to be enabled from the BBU;

The first determining module is configured to determine whether the corresponding difference is greater than a preset third threshold; and the adjusting module is configured to: for the corresponding channel whose difference is greater than the third threshold, according to the corresponding The difference adjusts the gain of the channel;

The second judging module is configured to determine whether the number of adjustments is less than a preset number of times; and the initiating module is configured to re-initiate the antenna calibration processing flow when the output of the second judging module is YES.

12. The device according to claim 7, wherein the calibration management module comprises:

And a sending unit, configured to send a bitmap message for updating the antenna calibration channel to the RRU; and a receiving unit, configured to receive a response message of the bitmap message from the RRU.