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Decoding method and device for uplink control channel

A control channel and predictive control technology, which is applied in the direction of transmission path sub-channel allocation, signaling allocation, multi-frequency code system, etc., can solve problems such as performance loss, achieve the effect of reducing performance loss and improving the accuracy of frequency offset estimation

Inactive Publication Date: 2019-12-17
BEIJING XINWEI TELECOM TECH
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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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  • Decoding method and device for uplink control channel
  • Decoding method and device for uplink control channel
  • Decoding method and device for uplink control channel

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Embodiment Construction

[0047] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0048] figure 1 and figure 2 A method flowchart of the first embodiment of a method for decoding an uplink control channel according to the present invention is shown. An uplink control channel decoding method in this embodiment is mainly performed by an uplink control channel decoding device. Wherein, the method includes the following steps:

[0049] S11: Obtain frequency domain data and historical frequency offset values ​​of the user UE in the uplink subframe, and perform frequency offset pre-compensation on the frequency domain data according to the historical frequency offset values.

[0050] Specifically, the uplink subframe includes frequency domain data of...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L5/00H04B7/08
CPCH04B7/084H04L5/0048H04L5/0053H04L27/2657
Inventor 张娜李磊易志华乔晓燕李远英雷辉
Owner BEIJING XINWEI TELECOM TECH
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