PAM-6 Coded Modulation for IM/DD Channels with a Peak-Power Constraint
Information Theory
2021-04-30 v1 math.IT
Abstract
Coded modulation with probabilistic amplitude shaping (PAS) is considered for intensity modulation/direct detection channels with a transmitter peak-power constraint. PAS is used to map bits to a uniform PAM-6 distribution and outperforms PAM-8 for rates up to around 2.3 bits per channel use. PAM-6 with PAS also outperforms a cross-shaped QAM-32 constellation by up to 1 dB and 0.65 dB after bit-metric soft- and hard decoding, respectively. An alternative PAM-6 scheme based on a framed cross-shaped QAM-32 constellation is proposed that shows similar gains.
Keywords
Cite
@article{arxiv.2104.14304,
title = {PAM-6 Coded Modulation for IM/DD Channels with a Peak-Power Constraint},
author = {Tobias Prinz and Thomas Wiegart and Daniel Plabst and Stefano Calabrò and Georg Böcherer and Nebojsa Stojanovic and Talha Rahman},
journal= {arXiv preprint arXiv:2104.14304},
year = {2021}
}
Comments
submitted to 11th International Symposium on Topics in Coding