Radio frequency interferences suppression for noisy ultra wide band SAR measurements

A back projection algorithm dedicated to Ultra Wide Band (UWB) signals for synthetic aperture radar (SAR) imaging is described. The time domain aspect is all the more important that the transient nature of UWB signal supplies a vast amount of information on the electromagnetic scattering mechanisms. But, during UWB measurements, radio frequency interferences (RFI) can appear and obscure target detection. We have described how RFI can be an important noise source in UWB system and how they can be suppressed. The Least Mean Square (LMS) method for extracting RFI give good results, which are quantified with simulated data. Next, we would like to improve our sinusoidal model of the RFI to include a more complete description of the RFI signal and to apply the LMS algorithm to measured data.