Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar
Patent
1983-06-23
1988-09-13
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Synthetic aperture radar
342191, G01S 1390
Patent
active
047712872
ABSTRACT:
A method of correcting for focus errors or higher order errors, or various combinations thereof, in the final image effected by the processing of a radar. With regard to correcting focus errors, the method coherently combines the signal focus data from selected target time histories derived by a first stage processor of the radar to form a complex signal representative of the average focus error of the radar image. From the phase of the complex signal is derived a set of focus error compensation signals which are used to compensate for focus errors in the target time histories derived by the first stage processor. With regard to the higher order error correction, the method coherently combines the signal data from selected target time histories derived by the first stage processor by shifting the phase and frequency centroids of each complex signal thereof to a common value. Light filtering may be provided to remove wide band noise with a linear phase filter. Accordingly, the coherently combined and filtered error correction signals are point wise inverted and thereafter used to correct the complex signals of the time histories derived by the first stage processor. An additional embodiment is provided to permit both the focus error and higher order error correction methods to be performed at an intermediate stage in the radar processing.
REFERENCES:
patent: 3905031 (1975-09-01), McCord
patent: 4034370 (1977-07-01), Mims
patent: 4084158 (1978-04-01), Slawsby
patent: 4134113 (1979-01-01), Powell
patent: 4163231 (1979-07-01), Zuerndorfer
patent: 4164738 (1979-08-01), Swerling
patent: 4227194 (1980-10-01), Herman et al.
patent: 4246580 (1981-01-01), Caputi, Jr.
patent: 4325065 (1982-04-01), Caputi, Jr.
patent: 4339752 (1982-07-01), Williams et al.
patent: 4387373 (1983-06-01), Longuemare, Jr.
patent: 4471357 (1984-09-01), Wu et al.
patent: 4546355 (1985-10-01), Boles
Sotomayor John B.
Sutcliff W. G.
Tarcza Thomas H.
Westinghouse Electric Corp.
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