Abstract
Spatially coupled (SC) low-density parity-check (LDPC) codes can achieve capacity approaching belief propagation (BP) decoding performance with low message recovery latency when using the sliding window decoding (SWD). The SWD is suitable for data stream transmission but cannot always correct all errors in the targeted symbol set. A further decoding stage would be desirable to eliminate the remaining errors from SWD. This paper proposes a novel concatenated coding scheme where the Reed-Solomon (RS) codes and the SC-LDPC codes are chosen as the outer code and the inner code, respectively, namely the RS-SC-LDPC codes. Consequently, the remaining errors from SWD can be corrected by the outer RS codes. In the concatenated coding scheme, the inner SC-LDPC code is designed such that it has a large girth and locally systematic encoding property. Our simulation results show the RS-SC-LDPC codes can achieve a high decoding performance, while the error floor of the inner code can be removed.
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