Design of Code Pair for Protograph-LDPC Codes-Based JSCC System With Joint Shuffled Scheduling Decoding Algorithm

Although there are many studies on code optimization of the joint source-channel coding (JSCC) system based on double protograph low-density parity-check codes with the joint belief propagation (JBP) algorithm, but it is still unknown whether the source code and channel code (as a code pair) can per...

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Vydáno v:IEEE communications letters Ročník 25; číslo 12; s. 3770 - 3774
Hlavní autoři: Xu, Zhiping, Wang, Lin, Hong, Shaohua, Chen, Guanrong
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.12.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Algorithms
Channel coding
Codes
Decoding
Design optimization
Entropy
Error correcting codes
Information transfer
joint source-channel coding
Parity check codes
PEXIT analysis
Protograph LDPC code
Scheduling
shuffled scheduling decoding
Source code
Source coding
Waterfalls
ISSN:1089-7798, 1558-2558
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Shrnutí:Although there are many studies on code optimization of the joint source-channel coding (JSCC) system based on double protograph low-density parity-check codes with the joint belief propagation (JBP) algorithm, but it is still unknown whether the source code and channel code (as a code pair) can perform well when the joint shuffled scheduling decoding (JSSD) algorithm is adopted. In this letter, two decoding threshold analysis algorithms, including joint shuffled protograph extrinsic information transfer (PEXIT) and source shuffled PEXIT algorithm, are proposed to calculate joint/source decoding thresholds for this system with the JSSD algorithm. With the proposed algorithms, it is found that the optimized code pairs for this system with the JBP algorithm may not perform well with the JSSD algorithm, implying that code pair with the JSSD algorithm needs to be redesigned. Then, a two-stage optimized framework is proposed to design the code pair for this system with the JSSD algorithm. Simulations and decoding threshold analysis both show that the proposed code pair for this system with the JSSD algorithm can obtain lower error floor and better waterfall performance than the existing code pairs.
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ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2021.3112717