Protograph-Based LDPC Code Design for Probabilistic Shaping with On-Off Keying

2019/01/10 by Git, Alexandru Dominic, Matuz, Balázs, Steiner, Fabian · 1 citation
#FOS: Computer and information sciences #Information Theory (cs.IT)

paper · doi:10.48550/arxiv.1901.03285

Abstract

This work investigates protograph-based LDPC codes for the AWGN channel with OOK modulation. A non-uniform distribution of the OOK modulation symbols is considered to improve the power efficiency especially for low SNRs. To this end, a specific transmitter architecture based on time sharing is proposed that allows probabilistic shaping of (some) OOK modulation symbols. Tailored protograph-based LDPC code designs outperform standard schemes with uniform signaling and off-the-shelf codes by 1.1 dB for a transmission rate of 0.25 bits/channel use.

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• Efficient Probabilistic Parity Shaping for Irregular Repeat-Accumulate LDPC Codes

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