Partially adaptive quiescent response design for maximization of interference cancellation

In partially adaptive beamformers the adaptive weights utilize only a fraction of the available degrees of freedom. A procedure for incorporating the unused degrees of freedom into the beamformer´s quiescent response is presented. The modified quiescent response is chosen to minimize the average interference scenarios. The interference power is a quadratic function of the quiescent response, so a unique minimum exists. A sidelobe cancelling interpretation indicates that this procedure designs quiescent weights which optimize the sum of the white noise gain and the error between the quiescent response and the class of responses which the adaptive branch can synthesize. Simulations illustrate the utility of the approach