A Doubly Parameterized Detector for Mismatched Signals

In this paper, we consider the problem of adaptive multichannel signal detection in the presence of signal mismatch, and introduce a novel tunable detector, which is parameterized by two tunable parameters. It has the Constant false alarm rate (CFAR) property and covers Kelly's generalized likelihood ratio test (KGLRT), Adap- tive matched filter (AMF), and Adaptive coherence esti- mator (ACE) as its three special cases. The novel detector controls the mismatched signal by adjusting two tunable parameters. Remarkably, it can achieve improved detec- tion performance for matched signals, enhanced rejection of seriously mismatched signals, and better robustness to slightly mismatched signals than its natural competitors.