Methods and system suppressing clutter in a gain-block,...

Details Methods and system suppressing clutter in a gain-block,... Methods and system suppressing clutter in a gain-block,...

2006-04-18

2006-04-18

Tarcza, Thomas H. (Department: 3662)

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

Radar transponder system

C342S051000

Reexamination Certificate

active

07030805

ABSTRACT:
Methods and systems reduce clutter interference in a radar-responsive tag system. A radar transmits a series of linear-frequency-modulated pulses and receives echo pulses from nearby terrain and from radar-responsive tags that may be in the imaged scene. Tags in the vicinity of the radar are activated by the radar's pulses. The tags receive and remodulate the radar pulses. Tag processing reverses the direction, in time, of the received waveform's linear frequency modulation. The tag retransmits the remodulated pulses. The radar uses a reversed-chirp de-ramp pulse to process the tag's echo. The invention applies to radar systems compatible with coherent gain-block tags. The invention provides a marked reduction in the strength of residual clutter echoes on each and every echo pulse received by the radar. SAR receiver processing effectively whitens passive-clutter signatures across the range dimension. Clutter suppression of approximately 14 dB is achievable for a typical radar system.

REFERENCES:
patent: 5486830 (1996-01-01), Axline et al.
patent: 5657022 (1997-08-01), Van Etten et al.
patent: 6222933 (2001-04-01), Mittermayer et al.
patent: 6329944 (2001-12-01), Richardson et al.
patent: 6396866 (2002-05-01), Upton et al.
patent: 6577266 (2003-06-01), Axline
patent: 6791489 (2004-09-01), Richardson et al.
patent: 6870501 (2005-03-01), Beard

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