Abstract
A sensor array is treated as a spatial filter in rejecting undesired signals. The array is governed by a control law derived from the noise covariance matrix supplied by the time-varying noise field in an optimal fashion. Signal-to-noise ratio is used as the optimality criterion. The optimal control law is self-adjusted by a simple adaptive scheme. The adaptive scheme is computationally efficient due to a fast matrix inversion formula. The adaptor is stable and is independent of initial condition for sufficiently long operating periods.
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