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Title: Radar echo processing with partitioned de-ramp

Patent ·
OSTI ID:1083027

The spurious-free dynamic range of a wideband radar system is increased by apportioning de-ramp processing across analog and digital processing domains. A chirp rate offset is applied between the received waveform and the reference waveform that is used for downconversion to the intermediate frequency (IF) range. The chirp rate offset results in a residual chirp in the IF signal prior to digitization. After digitization, the residual IF chirp is removed with digital signal processing.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Number(s):
8,400,349
Application Number:
12/844,576
OSTI ID:
1083027
Country of Publication:
United States
Language:
English

References (4)

Wide band stepped frequency ground penetrating radar patent March 1996
High-resolution three-dimensional imaging radar patent August 2010
Unambiguous range-doppler processing method and system patent August 1997
Gated FMCW DF radar and signal processing for range/doppler/angle determination patent November 1994