Methods And System Suppressing Clutter In A Gain-Block, Radar-Responsive Tag System
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.
- Inventors:
-
- Albuquerque, NM
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 880540
- Patent Number(s):
- 7030805
- Application Number:
- 10/898119
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Ormesher, Richard C, and Axline, Robert M. Methods And System Suppressing Clutter In A Gain-Block, Radar-Responsive Tag System. United States: N. p., 2006.
Web.
Ormesher, Richard C, & Axline, Robert M. Methods And System Suppressing Clutter In A Gain-Block, Radar-Responsive Tag System. United States.
Ormesher, Richard C, and Axline, Robert M. Tue .
"Methods And System Suppressing Clutter In A Gain-Block, Radar-Responsive Tag System". United States. https://www.osti.gov/servlets/purl/880540.
@article{osti_880540,
title = {Methods And System Suppressing Clutter In A Gain-Block, Radar-Responsive Tag System},
author = {Ormesher, Richard C and Axline, Robert M},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 18 00:00:00 EDT 2006},
month = {Tue Apr 18 00:00:00 EDT 2006}
}