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High-performance low-delay extended TPC decoding method

A low-latency, high-performance technology, applied in the direction of error detection coding, encoding, code conversion, etc., which applies multiple parity bits, can solve the problem of reducing the throughput of the decoder, low decoding performance, and increased decoding Code delay and other issues to achieve the effect of reducing the number of iterations

Active Publication Date: 2017-11-21
XIAN INSTITUE OF SPACE RADIO TECH
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AI Technical Summary

Problems solved by technology

At present, the soft decision of decoding uses the chase-2 algorithm. The chase-2 algorithm does not consider whether the check digit is correct or not, which reduces the throughput of the decoder, increases the decoding delay, and the decoding performance is not good. high

Method used

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  • High-performance low-delay extended TPC decoding method

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Experimental program
Comparison scheme
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Embodiment

[0081] It is assumed that the received information bit block is a 26*26 matrix before encoding and a 32*32 matrix after encoding.

[0082] (1) carry out the following operations to each row and each column codeword respectively, take the first row as an example here:

[0083] (1.1) Find unreliable locations

[0084] Take p=4, that is, find the 4 values ​​with the smallest reliability as unreliable positions.

[0085] (1.2) Determine the candidate codeword

[0086] On the unreliable positions in (1.1), substitute all possible bit arrangements to obtain 16 test patterns. Perform algebraic decoding on 16 test patterns to obtain 16 candidate codewords. Table 1 shows 16 test patterns, X represents the data after hard judgment, and columns 4, 10, 17, and 24 are unreliable positions.

[0087] Table 1 16 test patterns

[0088]

[0089]

[0090] (1.3) Judgment codeword selection

[0091] For the selection of the decision codeword, there are the following situations:

[009...

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Abstract

The invention proposes a high-performance low-delay extended TPC decoding method. The method combines a related metric value, the number of candidate code words and parity check bit to determine decision cord words of each row and each column of an input information bit block; if related conditions are not met, noise sound is relatively large, and results of hard decision are used as decision code words, hereby preventing error diffusion. After multiple times of iteration, a decoding method of input information is finally obtained. Compared with an originally adopted chase-2 algorithm, the decoding performance and throughput capacity are obviously improved, decoding delay is reduced, and the corresponding hardware complexity and calculated amount are not obviously increased.

Description

technical field [0001] The invention relates to an extended TPC decoding method with high performance and low time delay, which belongs to the field of electronic communication. Background technique [0002] The TPC code has a strong error correction capability, and a hard-decision decoding algorithm or a soft-decision decoding algorithm can be selected according to the actual situation when decoding. At present, the soft decision of decoding uses the chase-2 algorithm. The chase-2 algorithm does not consider whether the check digit is correct or not, which reduces the throughput of the decoder, increases the decoding delay, and the decoding performance is not good. high. Contents of the invention [0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a high-performance and low-delay extended TPC decoding method, without increasing the amount of calculation and hardware complexity, the selection method ...

Claims

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Application Information

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IPC IPC(8): H03M13/11
CPCH03M13/1108
Inventor 许静文杨磊侴胜男张剑刘明洋
Owner XIAN INSTITUE OF SPACE RADIO TECH
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