Adaptive design of FIR filter with applications in broadband beamforming

The design of FIR digital filter based on minimum mean square error criterion can be implemented via adaptive approach. An iterative algorithm is proposed in this paper to enhance the effectiveness of adaptive FIR digital filter design through adaptively obtaining optimum cost functions. This modified approach results in the best values of the cost function to reach a best fit between the FIR digital filter response and the design requirements. The adaptive design approach is used to get the weights of FIR filters in time domain broadband beamformers. An example of broadband beamforming for a 12-element arc array is illustrated to show the effectiveness of the iterative algorithm proposed in this paper.