An adaptive projection pursuit filter for separating stationary interferences from nonstationary signals

This paper considers the problem of interference rejection using a sensor array with application to enhance signal reception. In contrast to conventional adaptive beamforming which requires knowledge of the array geometry and array response, we propose a two stage adaptive filter based on the blind signal separation approach to achieve interference rejection. The proposed method is based on the practically viable assumptions that the desired signal is temporally non-stationary and the interference are temporally second-order stationary, and is applicable to arrays with uncalibrated response and geometry. Experimental results are presented to demonstrate the performance of the proposed method