Array signal processing techniques for broadband beamforming

Abstract

The content of this thesis comprises the original research work on the investigations of broadband beamforming techniques, including the design of broadband beamforming structures and algorithms, the performance analysis of broadband beamformers using nonuniform array geometries and the development of broadband pattern synthesis approaches. To optimize the interference and noise suppression performance of the Frost beamformer, three constrained optimization methods are developed to design the look-direction response, which is subsequently used to compute the optimum weight vector of the beamformer. A type of new broadband beamforming structure using tapped-delay-line-form (TDL-form) infinite impulse response (IIR) filters is designed. Adaptive algorithms are presented to compute the feedforward and feedback weights in the IIR beamformers.