Compact Architecture For Spectrum Analysis And Correlation

John M. Pellegrino; Norman J. Berg; Michael W. Casseday; Andree N. Filipov

doi:10.1117/12.942626

1 November 1987 Compact Architecture For Spectrum Analysis And Correlation

John M. Pellegrino, Norman J. Berg, Michael W. Casseday, Andree N. Filipov

Proceedings Volume 0477, Optical Technology for Microwave Applications I; (1987) https://doi.org/10.1117/12.942626
Event: 1984 Technical Symposium East, 1984, Arlington, United States

Abstract

An acousto-optic architecture for simultaneously obtaining time integration correlation and high-speed power spectrum analysis has been constructed using commercially available Te02 modulators and photodiode detector-arrays. The correlator section of the processor uses coherent interferometry to attain maximum bandwidth and dynamic range while achieving a time-bandwidth product of 106. Two correlator outputs are achieved in this system configuration. One is optically filtered and magnified 2 : 1 to decrease the spatial frequency to a level where a 25-MHz bandwidth may be sampled by a 62-mm array with elements on 25-μm centers. The other output is magnified by a factor of 10 such that the center 4 μS of information is available for estimation of time-difference-of-arrival to within 10 ns. The Bragg cell spectrum-analyzer section, which also has two outputs, resolves a 25-MHz instantaneous bandwidth to 25 kHz and can determine discrete-frequency reception time to within 15 μs. A microprocessor combines spectrum analysis information with that obtained from the correlator.

Citation Download Citation

John M. Pellegrino, Norman J. Berg, Michael W. Casseday, and Andree N. Filipov "Compact Architecture For Spectrum Analysis And Correlation", Proc. SPIE 0477, Optical Technology for Microwave Applications I, (1 November 1987); https://doi.org/10.1117/12.942626

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