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Proceedings Paper

A comparison of soft-decision decoding algorithms for differential pulse-position modulation (DPPM) in optical wireless communications
Author(s): Ubolthip Sethakaset; T. Aaron Gulliver
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Paper Abstract

In this paper, differential pulse-position modulation (DPPM) over an indoor optical wireless link is represented as a Markov source transmitted over a finite-state machine channel. Then, the MAP, Max-Log-MAP and SOVA algorithms are employed for soft-decision decoding of DPPM. The error performance with intersymbol interference is evaluated and compared to hard-decision decoding and MLSD. It is shown that the performance of Max-Log-MAP and SOVA is closed to that of MLSD and MAP with lower complexity.

Paper Details

Date Published: 3 October 2006
PDF: 10 pages
Proc. SPIE 6353, Optical Transmission, Switching, and Subsystems IV, 63532C (3 October 2006); doi: 10.1117/12.686704
Show Author Affiliations
Ubolthip Sethakaset, Univ. of Victoria (Canada)
T. Aaron Gulliver, Univ. of Victoria (Canada)


Published in SPIE Proceedings Vol. 6353:
Optical Transmission, Switching, and Subsystems IV
Chang Soo Park; Shizhong Xie; Curtis R. Menyuk; Ken-ichi Kitayama, Editor(s)

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