Method and device for detecting channel abnormality of base station based on distributed antenna

Abstract

The invention discloses a method and device for detecting channel abnormality of a base station based on a distributed antenna, aiming to improve exactness of channel abnormality detection of the base station. The base station comprises a plurality of distributed antennas, and each distributed antenna corresponds to one base band processing plate. The method comprises the following steps that: each base band processing plate executes the following process on each frequency point of each corresponding distributed antenna: determining whether each channel is broken or not according to self interference power of each channel corresponding to each upstream time slot / sub-frame, specific to the each upstream time slot / sub-frame corresponding to the frequency point so as to obtain a broken channel of the upstream time slot / sub-frame; therefore, the broken channels of all upstream time slots / sub-frames corresponding to the frequency points are determined; and the base band processing plate determines the broken channels to be abnormal channels when the broken channels of the all upstream time slots / sub-frames of the frequency points corresponding to the distributed antennas are consistent; and otherwise, the base band processing plate determines the broken channels to be interference channels.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a method and device for detecting abnormality of a base station channel based on a distributed antenna. Background technique [0002] At present, in order to ensure the function of smart antennas, the smart antenna array is periodically calibrated according to the traditional antenna baseband detection technology to compensate for the phase and amplitude deviations between the working antennas in the smart antenna array, and to monitor each channel of the base station in real time Physical damage. However, with the diversification of the number and form of antennas in base stations, a large number of distributed antennas are widely used in indoor distribution systems; since the antenna channels of the distributed antennas are independent of each other, there is no phase and amplitude between working antennas There is no need to calibrate the phase and amplitude deviation between...

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Problems solved by technology

[0003] Method 1. For each channel of the base station, monitor the analog signal power or intermediate frequency signal power on the channel, and compare the measured analog signal power or intermediate frequency signal power with the preset empirical threshold value, and based on the comparison result Judging whether the channel is abnormal; the basis of this detection method is relatively simple, ignoring the requirements of the baseband digital signal on the performance of the channel

[0004] Method 2: Detect whether each channel of the antenna is abnormal according to the total power of the baseband received signal of a single antenna; this detection method is relatively absolute. Although it can avoid the problem of missed detection, the total power of the received signal itself is not a factor that affects the baseband processing. Performance indicators, even if the total power of the received signal is too large, as long as the interference signal is not large, it will not affect the subsequent baseband processing performance, and the channel cannot be considered abnormal. Therefore, the accuracy of detecting whether the channel is abnormal through the total power of the baseband received signal is relatively Difference

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