1. Design of Low-Density Parity-Check Code Pair for Joint Source-Channel Coding Systems Based on Graph Theory.
- Author
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Lv, Yijie, He, Jiguang, Xu, Weikai, and Wang, Lin
- Subjects
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GRAPH theory , *LOW density parity check codes , *PARITY-check matrix , *CHANNEL coding , *TWO-dimensional bar codes , *DECODING algorithms - Abstract
In this article, a graph-theoretic method (taking advantage of constraints among sets associated with the corresponding parity-check matrices) is applied for the construction of a double low-density parity-check (D-LDPC) code (also known as LDPC code pair) in a joint source-channel coding (JSCC) system. Specifically, we pre-set the girth of the parity-check matrix for the LDPC code pair when jointly designing the two LDPC codes, which are constructed by following the set constraints. The constructed parity-check matrices for channel codes comprise an identity submatrix and an additional submatrix, whose column weights can be pre-set to be any positive integer numbers. Simulation results illustrate that the constructed D-LDPC codes exhibit significant performance improvement and enhanced flexible frame length (i.e., adaptability under various channel conditions) compared with the benchmark code pair. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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