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Title: Time-dependent phase error correction using digital waveform synthesis

Patent ·
OSTI ID:1398979

The various technologies presented herein relate to correcting a time-dependent phase error generated as part of the formation of a radar waveform. A waveform can be pre-distorted to facilitate correction of an error induced into the waveform by a downstream operation/component in a radar system. For example, amplifier power droop effect can engender a time-dependent phase error in a waveform as part of a radar signal generating operation. The error can be quantified and an according complimentary distortion can be applied to the waveform to facilitate negation of the error during the subsequent processing of the waveform. A time domain correction can be applied by a phase error correction look up table incorporated into a waveform phase generator.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
Assignee:
National Technology & Engineering Solutions of Sandia, LLC
Patent Number(s):
9,784,818
Application Number:
14/045,993
OSTI ID:
1398979
Resource Relation:
Patent File Date: 2013 Oct 04
Country of Publication:
United States
Language:
English

References (15)

Digital frequency synthesizer patent June 1990
Computer based fast phase difference measuring unit and PLL using same patent January 2000
Multiplexed chirp waveform synthesizer patent September 2003
Waveform synthesis for imaging and ranging applications patent November 2004
Waveform synthesis for imaging and ranging applications patent December 2004
Waveform synthesis for imaging and ranging applications patent December 2004
Apparatus for producing an amplified radio frequency pulse patent May 2007
Method and system for operating a MEMS scanner on a resonant mode frequency patent March 2011
Method and system for generating a drive signal for a MEMS scanner patent April 2012
Time lag measuring device, distance measuring apparatus and distance measuring method patent-application September 2009
Method and System for Providing Resonant Frequency Change Compensation in a Drive Signal for a Mems Scanner patent-application December 2010
Predistortion of complex modulated waveform patent-application January 2012
Synthetic aperture radar: not just a sensor of last resort conference August 2003
Digital signal processing applications in high-performance synthetic aperture radar processing conference November 2003
A high-resolution, four-band SAR Testbed with real-time image formation conference May 1996

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