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2010

Coded multipulse pulse-position modulation for free-space optical communications

9 years 8 months ago
Coded multipulse pulse-position modulation for free-space optical communications
—In this letter, we address two questions concerning the application of multipulse pulse-position modulation (MPPM) for free-space optical (FSO) communications: (1) under what condition would MPPM offer a notable advantage over conventional pulse-position modulation (PPM), and (2) what practical coding scheme should be used to realize that advantage. Focusing on bandwidth-efficient FSO transmission, we find decimated MPPM constellations which are suitable for combining with binary codes and offer significant gains in terms of constellationconstrained capacity over PPM under simultaneous peak-power, average-power, and bandwidth constraints. We then consider labeling design for the popular bit-interleaved coded modulation (BICM) and devise a new multilevel coding (MLC) architecture for MPPM, which we refer to as reduced-layer MLC (RLMLC). Considering the Poisson FSO channel model as a relevant example, we provide simulative evidence that RL-MLC MPPM with off-the-shelf low-density pa...
Trung Thanh Nguyen, Lutz H.-J. Lampe
Added 30 Jan 2011
Updated 30 Jan 2011
Type Journal
Year 2010
Where TCOM
Authors Trung Thanh Nguyen, Lutz H.-J. Lampe
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