SIMILARITY APPROACH FOR RADIO FREQUENCY INTERFERENCE DETECTION AND CORRECTION IN MULTI-RECEIVER SAR

Recently synthetic aperture radar (SAR) has become implemented in multi-receiver systems to achieve, for example, along track interferometry (ATI) and/or digital beam forming (DBF) for wide observation swath. In this paper, we propose a novel radio frequency interference (RFI) detection method especially for multi-receiver SAR systems. We assume that RFI signals have greater similarity than the summation of radar echoes among multiple receivers. Based on this idea, we performed an interferometric analysis of the SAR raw data in both time and frequency domain and removed signals which associated with an exceptionally high correlation. We report experimental results with fully-polarimetric, single-pass interferometric dataset acquired by DLR's F-SAR sensor.