Achievable Rates for Four-Dimensional Coded Modulation with a Bit-Wise Receiver

Published 15 Oct 2013 in cs.IT, math.IT, and physics.optics | (1310.4149v1)

Abstract: We study achievable rates for four-dimensional (4D) constellations for spectrally efficient optical systems based on a (suboptimal) bit-wise receiver. We show that PM-QPSK outperforms the best 4D constellation designed for uncoded transmission by approximately 1 dB. Numerical results using LDPC codes validate the analysis.

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