Joint Design of Channel Output Quantizer and LUT-Based LDPC Decoder

Recently, the LUT-based LDPC decoder has been designed by maximizing mutual information, where the performances of channel output quantizer and LUT-based decoder are considered separately. In this work, we propose the joint design of the channel output quantizer and LUT-based decoder. Our joint design aims to minimize the error probability of LDPC decoding through the density evolution algorithm. We found that the joint design outperforms the previous work at the waterfall region.