Récepteurs GLRT pour la détection d'un signal connu perturbé par des interférences non-circulaires

Detecting a known signal with unknown parameters in the presence of interferences, whose second order statistics are unknown, has received considerable attention these last decades. However, most of the available receivers assume second order (SO) circular interferences and become suboptimal in the presence of SO noncircular interferences, omnipresent in practical situations. For this reason, following a generalized likelihood ratio test (GLRT) approach, we introduce several new array receivers for the detection of a known signal, with different sets of unknown parameters, corrupted by unknown noncircular interferences and we analyze their performance. These new detectors are shown to entail large gains in performance with respect to conventional ones for noncircular interferences.