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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 10, Iss. 12 — Dec. 1, 1971
  • pp: 2728–2733

Optical Processing of Radar Signals with Fresnel Diffraction Masks

H. Stark, F. B. Tuteur, and M. Sayar  »View Author Affiliations


Applied Optics, Vol. 10, Issue 12, pp. 2728-2733 (1971)
http://dx.doi.org/10.1364/AO.10.002728


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Abstract

A simple real-time coherent optical processor is investigated. The processor uses a filter mask upon which is recorded the Fresnel field of the signal replica. Target range-Doppler information is obtained by observing the time and position of the output. A distinguishing feature of the processor is that for the ordinary PCW pulse, these output quantities are correlated, albeit weakly, in much the same fashion as the range-Doppler estimates associated with the output of the linear FM correlator. This interesting property is shown to depend on a single optical parameter. A modified optical configuration that enables a greater practical exploitation of this property is suggested. To obtain unbiased target range estimates, two output terms must be observed, but the range estimate thus obtained has a lower variance than the estimate obtained from either output.

© 1971 Optical Society of America

Citation
H. Stark, F. B. Tuteur, and M. Sayar, "Optical Processing of Radar Signals with Fresnel Diffraction Masks," Appl. Opt. 10, 2728-2733 (1971)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-10-12-2728

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