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Concatenated Spatially Coupled LDPC Codes With Sliding Window Decoding for Joint Source-Channel Coding
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DOI：10.1109/TCOMM.2021.3126750.png)
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Abstract
En 中文
In this paper, a method for joint source-channel coding (JSCC) based on concatenated spatially coupled low-density parity-check (SC-LDPC) codes is investigated. A construction consisting of two SC-LDPC codes is proposed: one for source coding and the other for channel coding, with a joint belief propagation-based decoder. Also, a novel windowed decoding (WD) scheme is presented with significantly reduced latency and complexity requirements. The asymptotic behavior for various graph node degrees is analyzed using a protograph-based Extrinsic Information Transfer (EXIT) chart analysis for both LDPC block codes with block decoding and for SC-LDPC codes with the WD scheme, showing robust performance for concatenated SC-LDPC codes. Simulation results show a notable performance improvement compared to existing state-of-the-art JSCC schemes based on LDPC codes with comparable latency and complexity constraints.
Keywords:
Codes
Parity check codes
Decoding
Source coding
Convolutional codes
Generators
Sparse matrices
Low-density parity-check (LDPC) codes
spatially coupled codes
joint source-channel coding
window decoding
Journal
IF:
8.3
Papers:
1.2W
Citations:
3.6W