Adaptive beamforming for correlated signal and interferences: A frequency-domain smoothing approach

A novel approach is presented to wideband adaptive beamforming for correlated desired signal and interferences. Unlike spatial smoothing, it solves the signal cancellation problem by using the idea of frequency-domain smoothing. Advantages over the spatial smoothing are identified, and a particular method is developed for moderately wideband system applications. A preliminary performance study shows that proper spatial filtering can be achieved whether the desired signal and the interferences are correlated or not