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Channel coding method for error control

A channel coding and error control technology, applied in the field of satellite communication, can solve the problems of high implementation complexity and poor reliability.

Inactive Publication Date: 2019-03-01
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Description
  • Claims
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Problems solved by technology

[0007] An error-controlled channel coding method disclosed by the invention solves the technical problems of poor reliability of the coding process and high implementation complexity caused by the approach performance of the polar code and the error floor of the LDGM code in the prior art

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Embodiment Construction

[0079] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0080] The technical solution of the present invention is realized in the following way: an error control channel coding method includes: polar code and PLG code of LDGM code.

[0081] The polar code and the LDGM code are serially concatenated, using the polar code as the outer code and the LDGM code as the PLG code of the inner code;

[0082] The polar codes and LDGM codes are connected in parallel; including a group of PLG codes with polar codes as outer codes an...

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Abstract

The invention relates to the field of satellite communications, and solves the technical problem of poor reliability and high complexity of the coding process. A channel coding method for error control comprises a PLG code with a polarization code as the outer code and an LDGM code as the inner code, and the polarization code and the LDGM code are in serial concatenation. A channel coding method for error control provided by the invention has low implementation complexity and closes against the Shannon limit performance with no error floors; the polarization code with high code rate is used asthe outer code and the LDGM code is used as the inner code by a cascade method to reach extremely low BER and prevent the possibility of error floors; and both polarization code and LDGM code are decoded by a BP algorithm, and the PLG code is effectively constructed by using a Gaussian approximation method (GA), which greatly simplifies the analysis for the performance of BER.

Description

technical field [0001] The invention relates to the field of satellite communication, in particular to an error control channel coding method. Background technique [0002] In satellite communication systems, how to find a strong error control code to approach the Shannon capacity limit has been the goal that coders have been pursuing for decades. So far, a variety of error control coding schemes have been widely used in satellite communication systems, such as BCH (Bose, Chaudhari and Hocquenghem) codes, RS (Reed-Solomon) codes, convolutional codes and low density check codes ( low density parity check, LDPC). [0003] LDPC code is a kind of random coding, which has been proved to be the most promising near-Shannon-limited channel coding scheme. However, when conventional LDPC codes are applied in practical communication environments, the encoding and decoding complexity cannot be ignored, because usually they require quadratic encoding complexity. Low density generator ...

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/0056H04L1/0057
Inventor 多滨罗俊松张澎方勇钟晓玲郭勇
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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