Edge Connection Optimization for JSCC System Based on DP-LDPC Codes

Recently, it is found that the bit error rate performance can be improved by optimizing the edge connections between the source code and the channel code (<inline-formula> <tex-math notation="LaTeX">{B}_{L1} </tex-math></inline-formula> or <inline-formula> <...

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Vydáno v:IEEE wireless communications letters Ročník 8; číslo 4; s. 996 - 999
Hlavní autoři: Liu, Sanya, Chen, Chen, Wang, Lin, Hong, Shaohua
Médium: Journal Article
Jazyk:angličtina
Vydáno: Piscataway IEEE 01.08.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Bit error rate
Channel coding
Codes
Computer simulation
Decoding
DP-LDPC
Edge connection
Error correcting codes
Information transfer
JSCC system
Low density parity check codes
Mathematical model
Optimization
Parity check codes
Performance enhancement
Search algorithms
Source code
the JPEXIT
the source PEXIT
ISSN:2162-2337, 2162-2345
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Shrnutí:Recently, it is found that the bit error rate performance can be improved by optimizing the edge connections between the source code and the channel code (<inline-formula> <tex-math notation="LaTeX">{B}_{L1} </tex-math></inline-formula> or <inline-formula> <tex-math notation="LaTeX">{B}_{L2} </tex-math></inline-formula> in the joint base matrix <inline-formula> <tex-math notation="LaTeX">{B}_{J} </tex-math></inline-formula>) for joint source-channel coding system based on double protograph low density parity check codes. In this letter, the connection relationship in <inline-formula> <tex-math notation="LaTeX">{B}_{L1} </tex-math></inline-formula> from the angle of both the source code and the channel code is analyzed, where the protograph LDPC codes with various row weights used as the source code are taken into account. And a search algorithm for <inline-formula> <tex-math notation="LaTeX">{B}_{L1} </tex-math></inline-formula> under the constraints is proposed based on the joint protograph extrinsic information transfer (JPEXIT) and the source PEXIT to improve the performance. Both the JPEXIT analysis and the simulation results indicate that the performance of the searched optimal scheme has considerable gain compared with the conventional solutions.
Bibliografie:ObjectType-Article-1
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ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2019.2903442