Title :
RFI suppression for ultra wideband radar
Author :
Miller, Timothy ; Potter, Lee ; McCorkle, John
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
An estimate-and-subtract algorithm is presented for the real-time digital suppression of radio frequency interference (RFI) in ultrawideband (UWB) synthetic aperture radar (SAR) systems used for foliage- and ground-penetrating imaging. The algorithm separately processes fixed- and variable-frequency interferers. Excision of estimated targets greatly reduces bias in RFI estimates, thereby reducing target energy loss and sidelobe levels in SAR imagery. Performance is demonstrated on data collected with the Army Research Laboratory´s UWB rail SAR.
Keywords :
interference suppression; least squares approximations; radar imaging; radar interference; radiofrequency interference; synthetic aperture radar; Army Research Laboratory; RFI suppression; SAR imagery; UWB rail SAR; bias; estimate-and-subtract algorithm; estimated targets; foliage-penetrating imaging; ground-penetrating imaging; radio frequency interference; real-time digital suppression; sidelobe levels; signal model; target energy loss; ultra wideband radar; ultrawideband synthetic aperture radar; Adaptive filters; Energy loss; Filtering; Finite impulse response filter; Frequency estimation; Maximum likelihood estimation; Nonlinear filters; Radar antennas; Radiofrequency interference; Synthetic aperture radar; Ultra wideband antennas; Ultra wideband radar;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
