Method and device for quantifying confidence coefficient of multi-system LDPC code and decoder

Abstract

The embodiment of the invention is suitable for the technical field of encoding and decoding, and provides a confidence quantification method and device for a multi-system LDPC code, and a decoder. The method comprises the following steps: separately obtaining a confidence set of the multi-system LDPC code, wherein the confidence set comprises a plurality of confidence in one-to-one correspondencewith a plurality of symbols of the multi-system LDPC code; identifying a confidence maximum value in the confidence set; determining a numerical value difference between each confidence coefficient in the confidence coefficient set and the confidence coefficient maximum value; according to the size relation between the numerical value difference and a preset threshold value, quantizing each confidence coefficient into a limit numerical value, and determining the preset threshold value by the preset bit number of quantization processing. According to the embodiment of the invention, non-uniform quantification is carried out on each confidence coefficient according to the distribution characteristics and physical meanings of the confidence coefficients of the multi-system LDPC code, so thestorage space of the confidence coefficients can be optimized, and the complexity of an NB-LDPC decoding algorithm is reduced.

Description

technical field [0001] The invention belongs to the technical field of encoding and decoding, and in particular relates to a method for quantifying confidence of multi-ary LDPC codes, a device for quantifying confidence of multi-ary LDPC codes, a decoder and a computer-readable storage medium. Background technique [0002] Binary LDPC (Binary Low-Density-Parity-Check, referred to as B-LDPC) code is a block error correction code with a sparse parity check matrix, which is suitable for almost all channels and can quickly approach Shannon's theory in the form of a code length index The channel capacity is a research hotspot in the coding field in recent years. However, when the code length is relatively short, the performance of B-LDPC codes will be degraded to a certain extent. Therefore, some scholars have proposed a multi-ary LDPC (Non-Binary Low-Density-Parity-Check, NB-LDPC for short) code on the basis of the B-LDPC code. Compared with B-LDPC codes, especially when the c...

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a method, device and decoder for quantifying the confidence of a multi-ary LDPC code, so as to solve the problem that the logarithmic representation of the multi-ary LDPC code takes too much confidence in the prior art. storage space problem

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