Low-Complexity Sliding Window Decoding of Spatially-Coupled LDPC Codes Constructed from Short 5G NR LDPC

We investigate in this paper how to optimize the number of iterations required for sliding window decoding of low-density parity-check (LDPC) codes. The aim of this study is to reduce decoding complexity and overcome the phenomenon of decoder blocking. We propose a new design of SC-LDPC codes based on some 5G short LDPC codes to reduce decoding complexity. Simulation results demonstrate a potential reduction in decoding computational complexity of the order of 30% without significant degradation in decoding performance. In addition to taking care of complexity, this mitigates the problem of sliding window decoder blocking by reducing the probability of observing this phenomenon.