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Proceedings Paper

Low complexity error-control-coding for variable duty-cycle pulse-position-modulation
Author(s): Bruce Moision
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Paper Abstract

Efficient use of a deep-space optical communications channel requires changes to the duty cycle of the modulation as the signal and noise powers change. This can be facilitated by modulating the signal with pulse-positionmodulation (PPM), supporting multiple PPM orders. To implement iterative demodulation, which is required by certain error-correction-codes to obtain near-capacity performance, would nominally require a distinct hardware implementation for each PPM order. In this paper we describe a method to utilize a single hardware implementation of an iterative demodulator for any PPM order. The method may be applied to any coded modulation that utilizes iterative demodulation and maps to multiple modulation orders.

Paper Details

Date Published: 19 August 2008
PDF: 10 pages
Proc. SPIE 7091, Free-Space Laser Communications VIII, 709104 (19 August 2008); doi: 10.1117/12.798441
Show Author Affiliations
Bruce Moision, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 7091:
Free-Space Laser Communications VIII
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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