Compression network displaced phase center electronic correlator

Details Compression network displaced phase center electronic correlator Compression network displaced phase center electronic correlator

1979-07-27

1996-02-06

Barron, Jr., Gilberto

Communications: directive radio wave systems and devices (e.g.,

Synthetic aperture radar

342189, G01S 1390

Patent

active

054899060

ABSTRACT:
A synthetic array processing system which simultaneously develops a plurality of parallel synthetic beams, each beam being spaced in time along a flight path and having different effective phase centers. Means are provided for storing and reading out a plurality of doppler history signals from each of a plurality of range positions and in one embodiment of the subject invention the read out sweep lengths are programmed as a function of the square root of range to allow use of a constant slope focusing oscillator. The center frequency of the doppler histories are offset as a predetermined function of range and applied through a focusing mixer to a time compression filter circuit. A plurality of compressed pulses provided at the output terminal of the compression filter circuit, each represent a doppler history of a point reflector and a synthetic beam and these signals are applied to a display which may be controlled as a function of the square root of range.

REFERENCES:
patent: 3725915 (1973-04-01), Herman et al.
J. A. Develet, Jr. "Performance of a Synthetic-Aperture Mapping Radar System." IEEE Trans. on Acrospace and Navigational Electronics, Sep. 1964 pp. 173-179.
Allen et al, "Digital Compressed-Time Correlators and Matched Filters For Active Sonar", Journal of the Acoustical Society of America, vol. 36, No. 1, Jan. 1964, pp. 121-139.

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