PERFORMANCE ANALYSIS OF BROADBAND MINIMUM VARIANCE BEAMFORMER

摘要

The bandwidth performance of a broadband adaptive array is investigated. The analysis is based on a linear array with N elements, where a tapped-delay line with L taps follows each element, and the signals and noise are assumed Gaussian. It is shown that a plateau is gotten in the frequency response at signal direction and adaptive nulling of the wideband interference by using multi-frequency constraints with the method of minimum variance distortionless response(MVDR). The comparison is made between the bandwidth related characteristics for broadband and narrowband adaptive beamforming.