Acousto-optic system for frequency and phase demodulation

Matthew Hicks; Christopher D. Reeve

doi:10.1117/12.243147

12 June 1996 Acousto-optic system for frequency and phase demodulation

Matthew Hicks, Christopher D. Reeve

Proceedings Volume 2754, Advances in Optical Information Processing VII; (1996) https://doi.org/10.1117/12.243147
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

A simple acousto-optic system is described that is capable of demodulating frequency and phase-modulated signals using a bicell photodetector. The performance of the system is modeled showing that, by taking the sum and difference of the outputs from the two bicell elements, it is possible to identify and demodulate a wide range of different types of modulation without any a priori information. Thus the technique is well suited for surveillance receiver and ESM applications. In particular it is shown that BPSK, QPSK, offset keyed QPSK, differential QPSK, continuous phase FSK (including MSK) and ordinary FSK all give unique and easily identifiable signatures. Some preliminary experimental results are presented, which are in good agreement with the modeled results.

Citation Download Citation

Matthew Hicks and Christopher D. Reeve "Acousto-optic system for frequency and phase demodulation", Proc. SPIE 2754, Advances in Optical Information Processing VII, (12 June 1996); https://doi.org/10.1117/12.243147

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