A multi-step scheme is proposed for the input quantization of message-passing decoders for low-density parity-check (LDPC) codes. The proposed scheme, which is applicable to both regular and irregular codes, lowers the error floor significantly at the cost of small increase in complexity, memory and latency.

error floor, Low-density parity-check (LDPC) codes, message-passing decoder, min-sum, quantization
dx.doi.org/10.1109/LCOMM.2013.111113.131881
IEEE Communications Letters
Department of Systems and Computer Engineering

Tolouei, S. (Sina), & Banihashemi, A. (2014). Lowering the error floor of LDPC codes using multi-step quantization. IEEE Communications Letters, 18(1), 86–89. doi:10.1109/LCOMM.2013.111113.131881