A Decoding Method Against Burst Errors

Abstract

The invention relates to a decoding method aiming at burst errors, and improves the OSD soft-judgment decoding algorithm of RS codes. Including: recording the occurrence position of the bit with a large level change through the setting of the threshold; locking the position where random errors may occur through the calculation of the logarithmic likelihood ratio, and jointly determining the unreliable position where the error may occur; increasing the burst The error pre-judgment module generates a parity check matrix that is a unit matrix at the corresponding position according to the least reliable position; calculates the syndrome by the received codeword and the generated parity check matrix, and calculates the non-zero in the syndrome The number of bits, compare it with the set threshold, if the number of non-zero bits is less than the threshold, the judgment errors are concentrated in the selected unreliable position, otherwise, it is judged that there is an error in the reliable position; complete the decoding work .

Description

technical field [0001] The invention belongs to the field of error control coding in channel coding, and relates to a decoding algorithm for continuous burst errors and individual random errors in a burst error channel. Background technique [0002] With the rapid development of society, the rapid progress of science and technology, the information exchange between people is becoming more and more frequent, which are closely related to the development of communication technology. In particular, the digital communication mode has the advantages of long distance, high quality, easy encrypted storage and integration, etc., and has become the core of the contemporary communication mode. However, the channel environment of modern transmission is becoming more and more complex. Due to the influence of factors such as noise interference and defects caused by the nature of the channel itself, the signal deviation in the channel will cause errors in the received signal and affect the...

AI Technical Summary

Problems solved by technology

However, in the channel model with continuous burst errors, due to the interference of pulses, the error probability of a certain code element in the channel codeword is very high, and even continuous errors occur. Random errors in the channel model of linear Gaussian white noise also appear in the channel model

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