Title :
On optimal temporal weight spacing for broadband LCMV beamforming in the presence of single interference
Author :
Chotikakamthorn, Nopporn ; Sorntham, Klaikangwol ; Phonkam, Rungrote
Author_Institution :
Fac. of Inf. Technol., King Mongkut´´s Inst. of Technol., Bangkok, Thailand
Abstract :
The problem of improving the performance of broadband linearly constrained minimum variance (LCMV) adaptive beamforming is considered. A scenario with a single interference source has been investigated. From a numerical analysis, it is found that a suitable choice of the temporal weight spacing which improves the interference rejection performance, depends on the array aperture, as well as the interference direction of arrival. A simple rule for choosing the temporal weight spacing is provided. A method for selecting the weight spacing in practice is suggested. Simulation results for a speech enhancement problem show an improved performance by using the proposed choice of temporal weight spacing
Keywords :
array signal processing; direction-of-arrival estimation; interference suppression; numerical analysis; optimisation; speech enhancement; array aperture; broadband LCMV adaptive beamforming; interference; interference direction of arrival; interference rejection performance; linearly constrained minimum variance beamformer; numerical analysis; optimal temporal weight spacing; performance; simulation results; speech enhancement; temporal weight spacing; Additive noise; Apertures; Array signal processing; Degradation; Information technology; Interference; Medical simulation; Numerical analysis; Sensor arrays; Speech enhancement;
Conference_Titel :
Signal Processing Proceedings, 2000. WCCC-ICSP 2000. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-5747-7
DOI :
10.1109/ICOSP.2000.893471
