A comparison of soft-decision decoding algorithms for differential pulse-position modulation (DPPM) in optical wireless communications

Ubolthip Sethakaset; T. Aaron Gulliver

doi:10.1117/12.686704

3 October 2006 A comparison of soft-decision decoding algorithms for differential pulse-position modulation (DPPM) in optical wireless communications

Ubolthip Sethakaset, T. Aaron Gulliver

Author Affiliations +

Proceedings Volume 6353, Optical Transmission, Switching, and Subsystems IV; 63532C (2006) https://doi.org/10.1117/12.686704
Event: Asia-Pacific Optical Communications, 2006, Gwangju, South Korea

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.

Citation Download Citation

Ubolthip Sethakaset and T. Aaron Gulliver "A comparison of soft-decision decoding algorithms for differential pulse-position modulation (DPPM) in optical wireless communications", Proc. SPIE 6353, Optical Transmission, Switching, and Subsystems IV, 63532C (3 October 2006); https://doi.org/10.1117/12.686704

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