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

Author

Balazs Matuz, Fabian Steiner, and Alexandru Dominic Git

Subjects
FOS: Computer and information sciences, LDPC codes, Computer science, Computer Science - Information Theory, Information Theory (cs.IT), On-off keying, Transmitter, OOK, time sharing, 020206 networking & telecommunications, Keying, Data_CODINGANDINFORMATIONTHEORY, 02 engineering and technology, symbols.namesake, 020210 optoelectronics & photonics, Additive white Gaussian noise, Modulation, 0202 electrical engineering, electronic engineering, information engineering, symbols, Electronic engineering, shaping, Low-density parity-check code, Communication channel, Channel use
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., Comment: Invited Paper for CISS 2019

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