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Proceedings Paper

Low-frequency sampling adaptive thresholding for free-space optical communication receivers with multiplicative noise
Author(s): Harris R. Burris; Christopher I. Moore; Michael J. Vilcheck; Rita Mahon; Mena F. Stell; Michele R. Suite; Mark A. Davis; William J. Scharpf; Anne E. Reed; William S. Rabinovich; G. Charmaine Gilbreath; Eun Oh; Nader M. Namazi
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Paper Abstract

An adaptive thresholding method is presented for optimum detection for optical receivers with large multiplicative noise. The technique uses low frequency sampling of the detected current that enables calculation of the bit means and variances and estimation of the optimum detection threshold. The regime in which this holds is when the sampling frequency is lower than the bit rate but higher than atmospheric turbulence frequency content. Simulations are done with data obtained from the NRL Chesapeake Bay Lasercomm Testbed. The results of simulations comparing BER performance versus sample rate and parameter estimation error will be presented. If the system parameters are characterized in advance with reasonable accuracy, the BER obtained will typically be an order of magnitude improvement over the equal variance threshold (depending on the signal to noise ratio).

Paper Details

Date Published: 27 January 2004
PDF: 14 pages
Proc. SPIE 5160, Free-Space Laser Communication and Active Laser Illumination III, (27 January 2004); doi: 10.1117/12.507553
Show Author Affiliations
Harris R. Burris, Research Support Instruments, Inc. (United States)
Christopher I. Moore, Naval Research Lab. (United States)
Michael J. Vilcheck, Naval Research Lab. (United States)
Rita Mahon, Titan Corp. (United States)
Mena F. Stell, Research Support Instruments, Inc. (United States)
Michele R. Suite, Naval Research Lab. (United States)
Mark A. Davis, Honeywell Technical Solutions Inc. (United States)
William J. Scharpf, Naval Research Lab. (United States)
Anne E. Reed, Naval Research Lab. (United States)
William S. Rabinovich, Naval Research Lab. (United States)
G. Charmaine Gilbreath, Naval Research Lab. (United States)
Eun Oh, Naval Research Lab. (United States)
Nader M. Namazi, Catholic Univ. of America (United States)

Published in SPIE Proceedings Vol. 5160:
Free-Space Laser Communication and Active Laser Illumination III
David G. Voelz; Jennifer C. Ricklin, Editor(s)

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