Radio frequency interferences suppression for ultra wide band radar

In this paper, a time domain processing of Ultra Wide Band SAR (Synthetic Aperture Radar) data and an algorithm to remove the Radio Frequency Interferences (RFI) measured with this kind of radar are described and tested. Usually a SAR is a narrow band system, but in our case it transmits nanosecond short pulses without carrier which have a spectral content from 100 MHz to 1 GHz. We investigate the possibilities of Ultra Wide Band radar imaging in order to scan the advantages over conventionnal radar. One of the potential advantage is the accurate target discrimination because of the short pulse duration, but one problem that we encounter is the RFI present in the UWB return. An algorithm based on Least Mean Square method is developped to extract and cancel these RFI.