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Proceedings Paper

Chase combining for on-off-keying FSO communications
Author(s): Kamran Kiasaleh
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Paper Abstract

In this paper, the concept of Chase Combining (CC) is extended to photon communications systems. It is assumed that intensity modulation (IM) along with on-off-keying (OOK) schemes are utilized to generate signals at the transmitter. At the receiver, direct-detection (DD) mechanisms are utilized to recover the transmitted signal. In particular, it is assumed that the optical detection is achieved via an avalanche photo-detector (APD). It is assumed that the photon channel is impacted by clear-air (log-normal) turbulence and that the major impairments of the receiver include receiver thermal noise, shot noise due to optical detection, background radiation, and random gain distortion caused by APD. Performance is established in terms of bit error rate (BER) using analytical and simulation means. The numerical results demonstrate that CC technique offers a significant improvement in performance at a cost of increased hardware complexity.

Paper Details

Date Published: 21 August 2009
PDF: 11 pages
Proc. SPIE 7464, Free-Space Laser Communications IX, 74640K (21 August 2009); doi: 10.1117/12.825122
Show Author Affiliations
Kamran Kiasaleh, The Univ. of Texas at Dallas (United States)

Published in SPIE Proceedings Vol. 7464:
Free-Space Laser Communications IX
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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