CFAR Analysis of Adaptive Detection Schemes for Multistatic/Polarimetric Radar Systems

This paper discusses the design of adaptive detectors for point-like targets in a sea-clutter environment, using a radar system with one monostatic node and two co-located, crosspolarized bistatic sensors. The detector design considers spatial variation in sea-clutter backscattering and potential relationships between covariance matrices for the bistatic polarimetric channels. Therefore, appropriate estimates of the nuisance parameters for both monostatic and bistatic measurements are utilized to formulate adaptive decision rules based on the two-step Generalized Likelihood Ratio Test (GLRT) criterion. The performance of these receivers is evaluated using data from the NetRAD system analyzing their Constant False Alarm Rate (CFAR) behavior. Results show that, for all the synthesized receivers, the false alarm probability remains nearly constant with respect to the nuisance parameters, thereby confirming their ability to achieve the CFAR property.