Pretreatment method for check matrix of bit reliability mapping

The invention relates to a pretreatment method for a check matrix of bit reliability mapping used for an LDPC coding modulation system, belonging to the technical field of wireless communication. The method comprises the following steps: generating a check matrix; reranking according to the row of e...

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Bibliographic Details
Main Authors XU YOUYUN, YU HUI, XIA ZHISHENG, CUI JING, ZHOU HONGYUAN
Format Patent
LanguageChinese
English
Published 16.12.2009
Subjects
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRICITY
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Summary:The invention relates to a pretreatment method for a check matrix of bit reliability mapping used for an LDPC coding modulation system, belonging to the technical field of wireless communication. The method comprises the following steps: generating a check matrix; reranking according to the row of every bit node of the check matrix; dividing the check matrix into L blocks of sub-matrixes with equal column number; reranking the divided check matrix; and obtaining the check matrix which can be used for bit reliability mapping after pre-treatment. The invention removes an interleaver needed for bit reliability mapping in the LDPC coding modulation system and the coded array can map according to a natural order, thus reducing realization complexity, shortening system time delay greatly; the column exchange of check matrix has no influence on the code word performance, so the system performance is totally the same as traditional bit reliability mapping realization method.
Bibliography:Application Number: CN2009154598