Method and apparatus for reducing range ambiguity in synthetic a

Details Method and apparatus for reducing range ambiguity in synthetic a Method and apparatus for reducing range ambiguity in synthetic a

1997-12-10

1999-10-26

Sotomayor, John B.

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

Synthetic aperture radar

342159, G01S 1390

Patent

active

059736348

ABSTRACT:
A modified Synthetic Aperture Radar (SAR) system with reduced sensitivity to range ambiguities, and which uses secondary receiver channels to detect the range ambiguous signals and subtract them from the signal received by the main channel. Both desired and range ambiguous signals are detected by a main receiver and by one or more identical secondary receivers. All receivers are connected to a common antenna with two or more feed systems offset in elevation (e.g., a reflector antenna with multiple feed horns or a phased array with multiple phase shift networks. The secondary receiver output(s) is (are) then subtracted from the main receiver output in such a way as to cancel the ambiguous signals while only slightly attenuating the desired signal and slightly increasing the noise in the main channel, and thus does not significantly affect the desired signal. This subtraction may be done in real time, or the outputs of the receivers may be recorded separately and combined during signal processing.

REFERENCES:
patent: H1005 (1991-12-01), Gerlach
patent: 3835469 (1974-09-01), Chen et al.
patent: 4489325 (1984-12-01), Bauck et al.
patent: 4566013 (1986-01-01), Steinberg et al.
patent: 5003314 (1991-03-01), Berkowitz et al.
patent: 5027125 (1991-06-01), Tang
patent: 5283587 (1994-02-01), Hirshfield et al.
patent: 5294933 (1994-03-01), Lee et al.
patent: 5537367 (1996-07-01), Lockwood et al.

Affiliated with

Also associated with

Rating

Method and apparatus for reducing range ambiguity in synthetic a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for reducing range ambiguity in synthetic a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing range ambiguity in synthetic a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-769443