Protograph-Based LDPC Code Design for Probabilistic Shaping with On-Off Keying
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.
- Publication:
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arXiv e-prints
- Pub Date:
- January 2019
- DOI:
- 10.48550/arXiv.1901.03285
- arXiv:
- arXiv:1901.03285
- Bibcode:
- 2019arXiv190103285G
- Keywords:
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- Computer Science - Information Theory
- E-Print:
- Invited Paper for CISS 2019