Decoding method and device for uplink control channel

Abstract

The invention provides an uplink control channel decoding method and an uplink control channel decoding device. The method comprises the following steps: frequency offset pre-compensation is made for frequency domain data based on historical frequency offset values; predicted control information bits are obtained through decoding; the sender data symbol is reconstructed, and the frequency offset residual error is calculated; whether a first ratio is greater than or equal to a preset threshold is judged; if the first ratio is greater than or equal to the preset threshold, historical frequency offset values for next pre-compensation is updated, and the predicted control information bits are valid; and if the first ratio is not greater than or equal to the preset threshold, the historical frequency offset values and the frequency offset residual error do not affect the historical frequency offset values for next pre-compensation of user equipment UE, and the predicted control information bits are invalid. The influence of wrong historical frequency offset values on subsequent control information bits and historical frequency offset values for next pre-compensation is avoided. The timeliness and effectiveness of historical frequency offset values are maintained as much as possible. By updating the historical frequency offset values according to the frequency offset residual error to make next pre-compensation, the accuracy of frequency offset estimation can be improved. The performance loss can still be reduced when the frequency offset is close to the theoretical limit.

Description

technical field [0001] The present invention relates to the communication field, in particular to a decoding method and a decoding device for an uplink control channel. Background technique [0002] At present, LTE networks are becoming more and more popular, and their application scenarios are becoming wider and wider. In high-speed scenarios, such as during the operation of high-speed trains and aircrafts, large Doppler frequency deviation will be generated due to high-speed operation, and Doppler frequency deviation will cause the degradation of physical layer demodulation performance. There are more and more researches on large frequency offset. Among them, the uplink control channel carries important content such as scheduling requests, downlink service feedback information, and channel quality information. It is very important to improve the demodulation performance of the control channel. In the existing scheme, it is proposed to estimate the frequency offset value t...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a decoding method and a decoding device for an uplink control channel, which are used to solve the problem of serious performance loss when the frequency offset is large

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