Radar And Communication Band Signal Processing Using Time-Integration Processors

Norman J. Berg; Michael W Casseday; Irwin J. Abramovitz; John N. Lee

doi:10.1117/12.958878

22 August 1980 Radar And Communication Band Signal Processing Using Time-Integration Processors

Norman J. Berg, Michael W Casseday, Irwin J. Abramovitz, John N. Lee

Author Affiliations +

Proceedings Volume 0232, 1980 Intl Optical Computing Conf II; (1980) https://doi.org/10.1117/12.958878
Event: 1980 Technical Symposium East, 1980, Washington, D.C., United States

Abstract

A new architecture for performing time-integration correlation is described. The correlator uses a surface acoustic wave (SAW) delay line, and features the optical interference of two coherent light beams which have been Bragg-diffracted by SAW's propagating in the line. The time integration is performed by a photodiode array which detects the diffracted light. Time-bandwidth products exceeding 106 (50 MHz times 30 ms) have been achieved. This two-beam SAW acousto-optic time-integrating correlator has been used to detect a number of wideband spread-spectrum signals. It has several attributes which make it particularly well suited for use as a spread-spectrum signal processor. These include linearity of operation, large time aperture over which the correlation can be observed, and the ability to determine the center frequency and bandwidth of the signals. The suitability of this correlator for use as a signal processor in spread-spectrum systems is considered. In addition, a two-dimensional realization of this correlator is proposed for frequency scanning correlation. The use of this frequency scanning correlator as an LPI radar signal processor is discussed.

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Norman J. Berg, Michael W Casseday, Irwin J. Abramovitz, and John N. Lee "Radar And Communication Band Signal Processing Using Time-Integration Processors", Proc. SPIE 0232, 1980 Intl Optical Computing Conf II, (22 August 1980); https://doi.org/10.1117/12.958878

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