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Proceedings Paper

Detection of M-ARY optical polarization modulation in a communication channel
Author(s): M. M. Danaei Ahmadi; Mandavilli Mukunda Rao
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Paper Abstract

An exact derivation is presented for the M-ary detection probability using the conventional decision rule. The analysis assumes a shot-noise-limited case, since in practice the thermal and background noises are negligible. Poisson statistics are employed for the detectors and this takes care of the shot noise. An error in detection occurs when the count corresponding to the signal is less than the count of any of the other detectors. Results indicate that the system performance cannot be improved beyond a certain level, since a component of signal acts as a source of noise to the other detectors. To combat this drawback, an alternate decision rule is suggested so as to improve the system performance. The results obtained for the BER in the two cases indicate that the alternate decision rule leads to a marked improvement especially at higher SNR.

Paper Details

Date Published: 16 August 1994
PDF: 8 pages
Proc. SPIE 2123, Free-Space Laser Communication Technologies VI, (16 August 1994); doi: 10.1117/12.184670
Show Author Affiliations
M. M. Danaei Ahmadi, Indian Institute of Technology/Madras (India)
Mandavilli Mukunda Rao, Indian Institute of Technology/Madras (India)

Published in SPIE Proceedings Vol. 2123:
Free-Space Laser Communication Technologies VI
G. Stephen Mecherle, Editor(s)

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