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Title: Shaping the spectrum of random-phase radar waveforms

The various technologies presented herein relate to generation of a desired waveform profile in the form of a spectrum of apparently random noise (e.g., white noise or colored noise), but with precise spectral characteristics. Hence, a waveform profile that could be readily determined (e.g., by a spoofing system) is effectively obscured. Obscuration is achieved by dividing the waveform into a series of chips, each with an assigned frequency, wherein the sequence of chips are subsequently randomized. Randomization can be a function of the application of a key to the chip sequence. During processing of the echo pulse, a copy of the randomized transmitted pulse is recovered or regenerated against which the received echo is correlated. Hence, with the echo energy range-compressed in this manner, it is possible to generate a radar image with precise impulse response.
Inventors:
;
Issue Date:
OSTI Identifier:
1356230
Assignee:
Sandia Corporation SNL-A
Patent Number(s):
9,645,228
Application Number:
14/102,928
Contract Number:
AC04-94AL85000
Resource Relation:
Patent File Date: 2013 Dec 11
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS; 47 OTHER INSTRUMENTATION

Other works cited in this record:

Terrain profile radar system
patent, July 1988

Complementary-sequence pulse radar with matched filtering and Doppler tolerant sidelobe suppression preceding Doppler filtering
patent, August 1995

Continuous wave wideband precision ranging radar
patent, March 1998

Dual mode tracking system
patent, March 2002

Method for removing RFI from SAR images
patent, August 2003

Noise correlation radar devices and methods for detecting targets with noise correlation radar
patent, October 2011

Method for estimating the position and the speed of a target with a radar emitting an OFDM waveform
patent, October 2014

Continuous Wave Radar
patent-application, February 2011

Noise radar using random phase and frequency modulation
journal, November 2004
  • Axelsson, S.R.J.
  • IEEE Transactions on Geoscience and Remote Sensing, Vol. 42, Issue 11, p. 2370-2384
  • DOI: 10.1109/TGRS.2004.834589

Analysis of Random Step Frequency Radar and Comparison With Experiments
journal, April 2007
  • Axelsson, Sune R. J.
  • IEEE Transactions on Geoscience and Remote Sensing, Vol. 45, Issue 4, p. 890-904
  • DOI: 10.1109/TGRS.2006.888865

Random Noise Radar/Sodar With Ultrawideband Waveforms
journal, May 2007
  • Axelsson, Sune R. J.
  • IEEE Transactions on Geoscience and Remote Sensing, Vol. 45, Issue 5, p. 1099-1114
  • DOI: 10.1109/TGRS.2007.893742

A technique for the generation of customizable ultra-wideband pseudo-noise waveforms
conference, May 2011
  • Vela, Russell; Erisman, David; Narayanan, Ram M.
  • Proc. SPIE, Vol. 8021
  • DOI: 10.1117/12.887083

Noisy Stepped Frequency (NSF) waveform in RF tomography
conference, May 2012
  • Vela, Russell; Lo Monte, Lorenzo; Ranney, Kenneth I.
  • Proc. SPIE, Vol. 8361
  • DOI: 10.1117/12.921222

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