Constant false alarm rate detection of Doppler-distributed targets in low-rank partly homogenous clutter

In the presence of Gaussian noise and low-rank, partly homogenous clutter, detectors based on the full-rank assumption lose the constant false alarm rate (CFAR) property, while those relying on clutter nulling perform poorly for targets within the clutter subspace. This paper addresses the CFAR detection problem of Doppler distributed targets via invariance theory. Assuming the target lies in the target subspace, its detection problem is transformed into a canonical form by both the clutter and