EG-LDPC decoder

A decoder and encoder technology, applied in the field of Euclidean geometric low-density parity-check code decoders, can solve the problems of H matrix row and column weight, inappropriate use of belief propagation algorithms, etc., so as to improve decoding efficiency and reduce storage. The effect of occupying resources

Pending Publication Date: 2020-09-04
SOUTHWEAT UNIV OF SCI & TECH
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Problems solved by technology

However, the H matrix of EG-LDPC has heavy rows and columns, which is not suitable for the use of belief propagation algorithm.

Method used

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Embodiment Construction

[0030] combined with figure 1 To illustrate, a preferred embodiment of an EG-LDPC decoder in the present invention includes: a controller, a shift operator, a data memory group, an H matrix memory, a receiving memory, a data operator, and a result operator. The shift operator accesses the original data to form order data circulant matrix input to the data memory bank, Be the data length; Store the position of 1 in the H matrix component vector in the described H matrix memory, the memory width of the RAM of its H matrix memory is , the storage depth is . The output of the H matrix memory is connected to the address bit of the data memory; the output end of the data memory group is connected to the input of the data operator, and the data length is , the output end of which is connected to the input end of the result operator; the result operator adds the XOR results of all sub-vectors, judges the error bit position and corrects it, and outputs the corrected result to ...

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Abstract

The invention relates to an EG-LDPC decoder and a method. The EG-LDPC decoder comprises a controller, a shift arithmetic unit, a data memory group, an H matrix memory, a receiving memory, a data arithmetic unit and a result arithmetic unit. The shift arithmetic unit accesses original data to form a data cyclic matrix and inputs the data cyclic matrix into the data memory. The H matrix memory stores the position of 1 in the H matrix sub-vector, and the output of the H matrix memory is connected to the address bit of the data memory bank. The output end of the data memory bank is connected withthe input end of the data arithmetic unit to perform exclusive OR on the received data vector, and the output end of the data arithmetic unit is connected to the result arithmetic unit. The result arithmetic unit performs addition operation on exclusive-OR results of all received H matrix partial vectors and corrects an error bit, and the output end of the result arithmetic unit is connected to the receiving memory. The decoder has the advantages that resources occupied by storage are reduced; and the decoding efficiency of the decoder is improved.

Description

technical field [0001] The invention relates to a Euclidean Geometry-LDPC (EG-LDPC) code decoder and method. Background technique [0002] Low Density Parity Check Codes (Low Density Parity Check Code, LDPC) have been extensively researched and applied as good codes that can approach the Shannon limit. So far, LDPC has been determined to be applied to the long code block coding scheme of 5G mobile broadband service data information. The core idea of ​​LDPC is to disperse information into a sparse vector space to obtain good decoding performance. [0003] At the beginning of the discovery of LDPC (Gallager, 1963), it was ignored because of the large amount of calculation that the computing equipment at that time was not enough to carry it. It was not until 30 years later that it re-entered people's sight (Tanner, 1981) (MacKay, 1999), and found its good Compilation and decoding performance. Constructing a random sparse matrix can be very close to the Shannon limit when dec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/11H03M13/15
CPCH03M13/1148H03M13/15
Inventor 李少甫施宇根汪乐谦
Owner SOUTHWEAT UNIV OF SCI & TECH
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