Title :
Design of Frequency Invariant Beamformers for Broadband Arrays
Author :
Liu, Wei ; Weiss, Stephan
Author_Institution :
Sheffield Univ., Sheffield
Abstract :
A new class of broadband arrays with frequency invariant beam pattern is proposed. By suitable substitutions, the beam pattern of a continuous sensor array can be regarded as the Fourier transform of its spatial and temporal parameters. For the design of practical discrete sensor arrays, it can be regarded as an approximation to the continuous sensor case and a simple design method is provided, which can be applied to linear, rectangular and cubic broadband arrays.
Keywords :
Fourier transforms; array signal processing; Fourier transform; approximation theory; continuous sensor array; cubic broadband array; frequency invariant beamformer pattern; linear broadband array; practical discrete sensor array design; rectangular broadband array; spatial parameter; temporal parameter; Design methodology; Design optimization; Filters; Fourier transforms; Frequency; Linear programming; Optimization methods; Radar applications; Sensor arrays; Sonar applications; Beamforming; frequency-invariant design; multi-dimensional arrays;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2007.907872
