Acousto-Optic Joint Transform Correlator As Applied To Spread Spectrum Communications

Francis T.S. Yu; Toshio Nagata

doi:10.1117/12.946934

22 August 1988 Acousto-Optic Joint Transform Correlator As Applied To Spread Spectrum Communications

Francis T.S. Yu, Toshio Nagata

Proceedings Volume 0936, Advances in Optical Information Processing III; (1988) https://doi.org/10.1117/12.946934
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

Abstract

A multichannel acousto-optic signal correlator based on optical joint transform correlation (OJTC) is presented. Parallel on-plane acousto-optic (AO) cells and a square law converter are used to produce cross-correlation of temporal-spatial signals. The AO cells are driven by frequency multiplexed temporal signals to produce spatially modulated signals. The joint Fourier transform of these spatially modulated signals is taken at the Fourier plane, where a square law detector converts the signals to a joint power spectra distribution. By simple coherent read-out, crosscorrelation of the input signals can be obtained at the output plane of the OJTC. Note that the proposed architecture can be packaged in a compact form. Since the multi-cell architecture can process broad band communication signals, we believe that the proposed technique can be applied to multi-frequency shift keying, as well as frequency hopped spread spectrum signals.

Citation Download Citation

Francis T.S. Yu and Toshio Nagata "Acousto-Optic Joint Transform Correlator As Applied To Spread Spectrum Communications", Proc. SPIE 0936, Advances in Optical Information Processing III, (22 August 1988); https://doi.org/10.1117/12.946934

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