Efficient Probabilistic Parity Shaping for Irregular Repeat-Accumulate LDPC Codes

TL;DR

This paper introduces an efficient method for shaping parity bits in IRA LDPC codes, improving communication performance over AWGN channels by up to 0.9 dB compared to uniform signaling.

Contribution

It proposes a novel probabilistic parity shaping algorithm tailored for IRA LDPC codes that enhances their efficiency and performance.

Findings

Achieves up to 0.9 dB gain over uniform signaling

Efficient shaping of parity bits following the accumulator's encoding order

Improves performance in AWGN channels with on-off keying

Abstract

Algorithms are presented that efficiently shape the parity bits of systematic irregular repeat-accumulate (IRA) low-density parity-check (LDPC) codes by following the sequential encoding order of the accumulator. Simulations over additive white Gaussian noise (AWGN) channels with on-off keying show a gain of up to 0.9 dB over uniform signaling.