Title :
Design of frequency invariant beamformers in subbands
Author :
Zhao, Yong ; Liu, Wei ; Langley, Richard J.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield, UK
Abstract :
A least squares approach to the design of frequency invariant beamformers (FIBs) in subbands is proposed. In this approach, the desired fullband beam response is first expressed as a function of the subband beamformer coefficients, and then a closed form solution is obtained based on a constrained least squares formulation. Two design examples are provided, with one based on a uniform linear array and one based on a scaled aperture.
Keywords :
array signal processing; least squares approximations; closed form solution; frequency invariant beamformers; least squares approach; scaled aperture; subband beamformer coefficients; uniform linear array; Apertures; Array signal processing; Closed-form solution; Delay; Filter bank; Fourier transforms; Frequency; Least squares methods; Sensor arrays; Sonar; Subband; frequency invariant beamformer; least squares; scaled aperture;
Conference_Titel :
Statistical Signal Processing, 2009. SSP '09. IEEE/SP 15th Workshop on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-2709-3
Electronic_ISBN :
978-1-4244-2711-6
DOI :
10.1109/SSP.2009.5278603
