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Optical Engineering

Study of the effects of signal filtering on acousto-optic correlator performance
Author(s): Oussama Bazzi; Marc-Georges Gazalet; Y. Mohanna; A. Alaeddine; A. Hafiz
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Paper Abstract

The performance of acousto-optic correlators (AOC) in spread-spectrum receivers is considered. The received pseudorandom sequences are correlated with reference ones in an acousto-optic cell. In particular, the effects of receiver filtering on the AOC processing gain are analyzed in the presence of additive white Gaussian noise (AWGN). The signal processing method is presented. For ideal AOCs, simple analytical expressions are derived for two different types of receiver filters: ideal and RC first-order filters. The results are given in terms of the ratio β of the code rate to the filter bandwidth. They show approximate processing gain losses of 4 dB for the first type and 1 dB for the second type for β=5. For real AOCs, the results are obtained from numerical simulation.

Paper Details

Date Published: 1 December 2006
PDF: 7 pages
Opt. Eng. 45(12) 128201 doi: 10.1117/1.2404675
Published in: Optical Engineering Volume 45, Issue 12
Show Author Affiliations
Oussama Bazzi, Lebanese Univ. (Lebanon)
Marc-Georges Gazalet, Univ. de Valenciennes et du Hainaut-Cambrésis (France)
Y. Mohanna, Lebanese Univ. (Lebanon)
A. Alaeddine, Lebanese Univ. (Lebanon)
A. Hafiz, Lebanese Univ. (Lebanon)

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