Method for constructing eIRA-like quasi-cyclic low-density parity-check (LDPC) code check matrix

A technology of low-density parity and check matrix, which is applied to the construction of quasi-cyclic low-density parity-check codes and the field of check matrix construction of quasi-cyclic low-density parity-check codes, can solve problems such as high error levels, and achieve The effect of low coding complexity, reduced complexity, and good performance
CN102006085AInactive Publication Date: 2011-04-06BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2011-04-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for constructing an eIRA-like quasi-cyclic low-density parity-check (LDPC) code check matrix and belongs to the field of communication channel encoding and decoding. On the basis of an LDPC code check matrix with a cyclic structure, the method for constructing the eIRA-like quasi-cyclic low-density parity-check (LDPC) code check matrix is provided by referring to an eIRA code check matrix in term of the thought of increasing the minimum girth. Furthermore, the shortest girth in the eIRA code check matrix is further increased by a short girth eliminating algorithm, so that a process with relatively high complexity of searching an eIRA code by a computer is eliminated.
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Description

technical field

[0001] The invention relates to a method for constructing a quasi-cyclic low-density parity-check code, belonging to the field of communication channel coding and decoding, and in particular to a method for constructing a check matrix of a quasi-cyclic low-density parity-check code similar to an eIRA codeword structure. Background technique

[0002] In general, practical channels are not ideal. First of all, these channels have non-ideal frequency selection characteristics. In addition, there are noise interference and other interference mixed in when the signal is transmitted through the channel. These disturbances impair the transmitted signal and cause errors in the received digital sequence. In order to overcome these noises and interferences and increase the reliability of data transmission, or to increase the fidelity of received signals, it is often necessary to introduce some redundant bits into the information sequence. This method of increasing da...

Claims

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