TY - GEN
T1 - Sparse wideband array design with reweighted iterative optimisation and frequency invariant response
AU - Hawes, Matthew B.
AU - Liu, Wei
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/9
Y1 - 2014/9
N2 - Sparse wideband sensor (such as microphones) array design for sensor location optimisation is traditionally solved by genetic algorithms, simulated annealing or other similar methods. Recently, a compressive sensing based approach has been proposed by minimising a modified l1 norm of the weight coefficients. To have a closer approximation to the original l0 norm minimisation, in this work, we further modify the design by adding a reweighting term to the modified l1 norm and propose a reweighted optimisation process for a design result with much improved sparsity. Moreover, the formulation can further be extended to give a frequency invariant (FI) response by considering the idea of response variation (RV). Limiting RV to a small value as an added constraint, we can obtain a sparse design result according to the frequency invariance criterion.
AB - Sparse wideband sensor (such as microphones) array design for sensor location optimisation is traditionally solved by genetic algorithms, simulated annealing or other similar methods. Recently, a compressive sensing based approach has been proposed by minimising a modified l1 norm of the weight coefficients. To have a closer approximation to the original l0 norm minimisation, in this work, we further modify the design by adding a reweighting term to the modified l1 norm and propose a reweighted optimisation process for a design result with much improved sparsity. Moreover, the formulation can further be extended to give a frequency invariant (FI) response by considering the idea of response variation (RV). Limiting RV to a small value as an added constraint, we can obtain a sparse design result according to the frequency invariance criterion.
KW - Compressive sensing
KW - Frequency invariant beamforming
KW - Sparse array
KW - Tapped delay-line
KW - Wideband beamforming
UR - https://www.scopus.com/pages/publications/84940775030
U2 - 10.1109/ICDSP.2014.6900698
DO - 10.1109/ICDSP.2014.6900698
M3 - Conference article published in proceeding or book
AN - SCOPUS:84940775030
T3 - International Conference on Digital Signal Processing, DSP
SP - 421
EP - 425
BT - 2014 19th International Conference on Digital Signal Processing, DSP 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 19th International Conference on Digital Signal Processing, DSP 2014
Y2 - 20 August 2014 through 23 August 2014
ER -