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Proceedings Paper

Radar And Communication Band Signal Processing Using Time-Integration Processors
Author(s): Norman J. Berg; Michael W Casseday; Irwin J. Abramovitz; John N. Lee
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Paper 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.

Paper Details

Date Published: 22 August 1980
PDF: 9 pages
Proc. SPIE 0232, 1980 Intl Optical Computing Conf II, (22 August 1980); doi: 10.1117/12.958878
Show Author Affiliations
Norman J. Berg, U.S. Army ERAD-COM (United States)
Michael W Casseday, U.S. Army ERADCOM (United States)
Irwin J. Abramovitz, U.S. Army ERADCOM (United States)
John N. Lee, U.S. Army ERADCOM (United States)

Published in SPIE Proceedings Vol. 0232:
1980 Intl Optical Computing Conf II
William T. Rhodes, Editor(s)

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