Abstract
A generalized likelihood-ratio test (GLRT) detector is derived for detecting a space-time signal in the presence of unknown subspace interference and unknown target Doppler. The near optimality and constant false alarm rate (CFAR) property of the GLRT is shown by the relationship to the uniformly most powerful invariant (UMPI) test using a simple approximation. Examples are presented comparing the performance of the proposed detector against the UMPI test. The ROC curves indicate that the GLRT detector compares favorably to the UMPI detector.
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