Detection performance degradation due to miscalibrated arrays in airborne radar

Several algorithms have been proposed for the standard radar signal detection problem. Two of these algorithms, the Generalized Likelihood Ratio Test (GLRT) and the adaptive matched jilter (AMF), are studied in this papel: Approxi-mate distributions for these tests are derived under the sig-nal present hypothesis. The signal model is then generalized to include random array perturbations. The approximate distributions are used to analyze the detection pelformanee of these tests when arraj perturbations are present. The ar-ray perturbations are shown to cause a sign$cant degra-dation in probabilit) of detection for appreciable signal-to-noise ratio (SNR). An ad hoc procedure f o r mitigating these array perturbations is presented, and simulations show that some performance improvement is achieved.