Detection algorithms to discriminate between radar targets and ECM signals

Authors:
Francesco Bandiera;Alfonso Farina;Danilo Orlando;Giuseppe Ricci
Affiliations:
Dipartimento di Ingegneria dell'Innovazione, Università del Salento, Lecce, Italy;SELEX-Sistemi Integrati, Rome, Italy;DAEIMI, Università degli Studi di Cassino, Cassino, Fr, Italy;Dipartimento di Ingegneria dell'Innovazione, Università del Salento, Lecce, Italy
Venue:
IEEE Transactions on Signal Processing
Year:
2010

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Abstract

We address adaptive detection of coherent signals backscattered by possible point-like targets or originated from electronic countermeasure (ECM) systems in presence of thermal noise, clutter, and possible noise-like interferers. In order to come up with a class of decision schemes capable of discriminating between targets and ECM signals, we resort to generalized likelihood ratio test (GLRT) implementations of a generalized Neyman-Pearson rule (i.e., for multiple hypotheses). The adaptive detectors rely on secondary data, free of signal components, but sharing the statistical characterization of the noise in the cell under test. The performance assessment focuses on an adaptive beamformer orthogonal rejection test (ABORT)-like detector; analytical expressions for the probability of false alarm, the probability of detection of the target, and the probability of blanking the ECM (coherent) signal are given. More remarkably, it guarantees the constant false alarm rate (CFAR) property. The performance assessment shows that it can outperform the adaptive sidelobe blanker (ASB) in presence of ECM systems.