Super-resolution for bistatic distortion mitigation

In recent years, bistatic and multistatic radar imaging systems have become popular for several applications and have gained interest within the radar scientific community. However, further issues have to be taken into account when dealing with bistatic configurations, such as synchronization and bistatic distortions. In this paper, further analysis and considerations about Bistatic ISAR (B-ISAR) theory and quadratic distortions in terms of range/Doppler migration due to the bistatic geometry are discussed. Analytical constraints for range and Doppler migration are defined by exploiting the concept of Bistatically Equivalent Monostatic (BEM) [1] and validated by means of simulated data. A super-resolution based method for bistatic distortion mitigation is then proposed and validated. Linear prediction based Bandwidth Extrapolation, Super-SVA and Compressed Sensing are tested, evaluated and compared when used for mitigating bistatic distortions.