Capacity-maximized MPPM constellations for free-space optical communications

TitleCapacity-maximized MPPM constellations for free-space optical communications
Publication TypeConference Paper
Year of Publication2008
AuthorsNguyen, T. T., and L. Lampe
Conference NameCommunication Systems, Networks and Digital Signal Processing, 2008. CNSDSP 2008. 6th International Symposium on
Pagination97 -101
Date Publishedjul.
Keywordscapacity-maximized MPPM constellations, channel capacity, constellation-constrained channel capacity, error correction codes, error-correcting codes, free-space optical communications, Gaussian processes, Gaussian regime, multipulse pulse-position modulation, optical communication, photon detection FSO channel, Poisson regime, pulse position modulation, telecommunication signalling

Multipulse pulse-position modulation (MPPM) is a preferred signaling scheme for free-space optical (FSO) communications under certain constraints. In order to enable the combination of MPPM with many types of error-correcting codes, it is desirable that the MPPM constellation size is a power of 2. In this paper, we study the selection of MPPM constellations of size 2k with integer k such that the constellation-constrained channel capacity is maximized. To this end, we consider both the Poisson and the Gaussian regime of the photon detection FSO channel.


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