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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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References

  1. L. J. Cutrona et al., IRE Trans. Inform. Theory IT-6, 386 (1960). [CrossRef]
  2. A. B. Vander Lugt, IEEE Trans. Inform. Theory IT-10, 139 (1964). [CrossRef]
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  6. M. Arm et al., IEEE Proc. 52, 842 (1964). [CrossRef]
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  8. As elsewhere in this paper, only relative magnitudes (or intensities) are of interest. Constants, unimportant phase factors, and the like are freely, and without warning to the reader, dropped.
  9. A. Kozma, D. L. Kelly, Appl. Opt. 4, 4, 387 (1965). [CrossRef]
  10. L. B. Lambert, Tech. Report T-1/321, Elec. Res. Labs. of Columbia University, New York (1965).
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  13. D. Treves, H. Stark, M. Sayar, Israel J. Tech. 9, 289 (1971).

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