Communications: directive radio wave systems and devices (e.g. – Determining direction
Patent
1992-08-21
1993-12-14
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Determining direction
342148, 342149, 342153, 342 80, G01S 1344, G01S 1348, G01S 1366
Patent
active
052707180
ABSTRACT:
A method and apparatus to determine angles .theta..sub.1 and .theta..sub.2 between paths of two sets of reflected radar waves and a radar boresight utilizes the electrical angles .beta..sub.1 or .beta..sub.2 and two successive radar target observations. One set of radar waves may travel a path from a target and the second set may travel a multipath from the same target. Alternatively, the two sets of radar waves may follow direct paths from two targets. For coherent radar hardware, signals from two halves of an array are processed through a linear coherent receiver, analog-to-digital converter and processing unit with associated memory. The memory contains a database and program which calculates the electrical angles .beta..sub.1 and .beta..sub.2 and angles .theta..sub.1, and .theta..sub.2. For non-coherent radar hardware, mixers, a phase detector and two magnitude detectors are substituted for the linear coherent receiver.
REFERENCES:
patent: 4005421 (1977-01-01), Dax
patent: 4012740 (1977-03-01), Lenneper
patent: 4090197 (1978-05-01), Cantrell
patent: 4316191 (1982-02-01), Sawatari et al.
patent: 4319242 (1982-03-01), Lewis
patent: 4472718 (1984-09-01), Ohashi et al.
patent: 4595924 (1986-06-01), Gehman
patent: 4734702 (1988-03-01), Kaplan
patent: 4796031 (1989-01-01), Koki
patent: 4837574 (1989-06-01), Hill
W. B. Gordon, "Improved Three Subaperture Method for Elevation Angle Estimation", IEEE Transactions on Aerospace and Electronic Systems, vol. AES-19, No. 1, Jan. 1983, pp. 114-122.
David K. Barton, "Low-Angle Radar Tracking", Proceedings of the IEEE, vol. 62, No. 6, Jun. 1974, pp. 687-704.
Samuel Mark Sherman, "A Dissertation in Electrical Engineering", Complex Angles in Monopuls Radar, 1965, Index, Table of Contents, pp. 54-63.
Raymond S. Berkowitz, Samuel M. Sherman, "Information Derivable from Monopulse Radar Measurements of Two Unresolved Targets", IEEE Transactions on Aerospace and Electrical Systems, Sep. 1971, pp. 1011-1013.
Peyton Z. Peeples, Jr., L. Goldman, Jr., "Radar Performance on Aerospace with Multipath Using the Complex Angle", IEEE Transactions On Aerospace and Electrical Systems, vol. AES-7, No. 1, Jan. 1971, pp. 171-178.
Dean D. Howard, Samuel M. Sherman, Don N. Thompson and James J. Capmbell, "Experimental Results of the Complex Angle Technique for Multipath Correction", IEEE Transactions on Aerospace and Electrical Systems, vol. AES-10, No. 6, Nov. 1974, pp. 779-787.
Sotomayor John B.
Technology Service Corporation
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