Adaptive arrays utilizing an internally generated reference signal to drive least mean square (LMS) weight determining loops have experienced difficulty arising from phase shifts induced by the reference generating circuits; the expected values of the weights oscillate in the steady state modulating the incoming signal. A scheme is reported which avoids this problem. It difference from earlier methods in that the reference generator has no infinite limiter; thus the amplitude of the reference is not constant. In addition, one element is left unweighted. Alternative schemes were considered wherein the reference signal is drawn from the weighted array elements only. It is shown that in the presence of a desired signal and independent element noise, the processing scheme proposed produces weights whose expected values converge to a constant nonoscillatory state provided certain mild constraints are satisfied.
Interference canceler array with reference generating loop
Interferenz-unterdrueckendes Array mit Referenzkreiserzeugung
IEEE Transactions on Aerospace and Electronic Systems ; AES-21 , 5 ; 654-662
1985
9 Seiten, 7 Quellen
Article (Journal)
English
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