Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar
Patent
1987-07-30
1990-03-20
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Synthetic aperture radar
G01S 1390
Patent
active
049105205
ABSTRACT:
A synthetic aperture radar processing system receiving return data from a plurality of transmitted pulses which utilizes frequency alignment for partitioning the received data into patches of data in an orderly sequence, a plurality of patches of data being formed in each of a plurality of range subswaths and being sequentially aligned in range columns. For each subswath, the return data is filtered in patch filters having wide bandwidths and passband overlaps selected so that each patch of data is totally included within a passband. The patch filters are selected for each subswath to provide sequential columns of data. Each patch of data for each subswath is then frequency shifted to an interpolator narrow band filter having a passband selected so that data outside of each patch is eliminated. As a result, the patches of data at the outputs of the interpolators are in the proper sequence for each column to be further processed without the addressing and bookkeeping problems associated with partitioning of data into patches with conventional patch filter banks.
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Bonfield et al, "Synthetic-Aperture-Radar Real-Time Processing", IEE Proc., vol. 127, Pt. F, No. 2, Apr. 80, pp. 155-162.
Sondergaard, "A Dual Mode Digital Processor Medium Resolution SAR", Conf. Radar, 1977, London, England, pp. 384-390.
Krikorian Kapriel V.
Rosen Robert A.
Victor Arnold E.
Alkov Leonard A.
Barron Jr. Gilberto
Denson-Low Wanda
Hughes Aircraft Company
Tarcza Thomas H.
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