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SPL
2016

On the Numerical Instability of an LCMV Beamformer for a Uniform Linear Array

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On the Numerical Instability of an LCMV Beamformer for a Uniform Linear Array
—We analyze the conditions for numerical instability in the solution of a linearly constrained minimum variance (LCMV) beamformer with multiple directional constraints for a uniform linear array. An analytic expression is presented to determine the frequencies (for broadband signals such as speech) where the inverse term in the solution of the LCMV beamformer does not exist. Simulation results and power patterns are provided to further illustrate the problem. In addition, we investigate and discuss possible solutions to the problem.
Soumitro Chakrabarty, Emanuel A. P. Habets
Added 10 Apr 2016
Updated 10 Apr 2016
Type Journal
Year 2016
Where SPL
Authors Soumitro Chakrabarty, Emanuel A. P. Habets
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