Low-density odd-parity check-code decoding method adopting uniform quantizing variable range

Abstract

This invention relates to a decoding method applying low density odd-even check codes of variable sphere uniform quantization including: selecting a group of parameters for decoding, initializing the soft information of the ith code cell of the LDPC code, the outer information output to the bit node I from the check node and their iterative times, decoding the variable sphere uniform quantization to the initialized and quantized soft information and outer information, totalizing all soft information and outer information of all the bit nodes to get the decodes, carrying out the following hard decision to all decode results to get the output result: if the check sum of the output result sequence is zero, or the iterative times reach to the maximum times, then the decode is finished, otherwise the time is plus with 1 to continue the decode.

Description

technical field

[0001] The invention belongs to the technical field of communication channel decoding, and in particular relates to an effective and fast method for correcting channel errors using a low-density parity-check code (LDPC code) when using forward error control (FEC) technology for data transmission and storage. numerical quantification method. Background technique

[0002] Various errors often occur during data storage and transmission. The reasons for this error include random noise, loss of synchronization during demodulation, multipath fading in wireless transmission, and track defects in magnetic storage. This kind of burst error generally appears non-periodically and lasts for an indefinite length of time. Due to the existence of these errors, the information transmission rate under a certain bandwidth and the storage capacity of a memory under a certain area are greatly limited. Especially in the wireless multimedia transmission system, since a large am...

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