Spatially coupled serially concatenated codes: Analysis and extension

Spatially coupled serially concatenated codes (SC-SCCs) perform well in the error floor region over additive white Gaussian noise (AWGN) channel. In this paper, firstly, we investigate the impact of the component codes on the performances of SC-SCCs. Simulation results show that, by properly selecting the component codes, we can trade off the performances of the SC-SCCs over the error floor region and the waterfall region. Secondly, we introduce a class of spatially coupled multiple-concatenated codes, the recursive-superposition-based SC-SCCs (RS-SC-SCCs). We derive the exact density evolution (DE) equations of the RS-SC-SCCs over the binary erasure channels (BECs). These equations can be used to guide the selection of the component codes and the coupling ratios. Simulation results over the AWGN channels show that the proposed RS-SC-SCCs perform better than the SC-SCC in both the waterfall region and the error floor region. (C)& nbsp;2022 Elsevier Inc. All rights reserved.

Automated summary

This paper investigates the performance of spatially coupled serially concatenated codes over AWGN channel and introduces a new class of concatenated codes RS-SC-SCC, which outperforms SC-SCC in both the error floor region and the waterfall region.