Diversity in receiving strategies based on time-delay analysis in the presence of multipath

The detection of targets in the presence of multipath is considered in this article. First, we conduct an electromagnetic (EM) analysis based upon prior knowledge of the radar-target environment to obtain time-delay information to characterize the multipath delay profile. Then, the delay profile of the environment is used to divide the region of interest into subregions where diverse receiving strategies are applied. Specifically, generalized likelihood ratio test (GLRT) receivers are used in the subregions where multipath components are well separated, while matched-filter (MF) detectors are applied when multipath components are clumped. As a case study, we consider a radar-target scenario over a flat conducting surface.