TY - GEN
T1 - Robust spherical microphone array beamforming with multi-beam-multi-null steering, and sidelobe control
AU - Sun, Haohai
AU - Yan, Shefeng
AU - Svensson, U. Peter
PY - 2009
Y1 - 2009
N2 - A spherical harmonics domain microphone array beamforming approach is proposed. It unifies 3D multi-beam forming with tractable mainlobe levels, automatic multi-null steering, sidelobe control, and robustness control into one optimization framework, using a single spherical microphone array. The optimum array weights are designed by maintaining distortionless responses in multiple mainlobe directions and guaranteeing all sidelobes below given threshold values, while minimizing the beamformer output power. A weight vector norm constraint is also employed to improve the robustness of the beamformer. A convex optimization formulation is derived, and implemented by the second order cone programming (SOCP) method. Design examples demonstrate a satisfactory performance.
AB - A spherical harmonics domain microphone array beamforming approach is proposed. It unifies 3D multi-beam forming with tractable mainlobe levels, automatic multi-null steering, sidelobe control, and robustness control into one optimization framework, using a single spherical microphone array. The optimum array weights are designed by maintaining distortionless responses in multiple mainlobe directions and guaranteeing all sidelobes below given threshold values, while minimizing the beamformer output power. A weight vector norm constraint is also employed to improve the robustness of the beamformer. A convex optimization formulation is derived, and implemented by the second order cone programming (SOCP) method. Design examples demonstrate a satisfactory performance.
KW - Array processing
KW - Multi-beam
KW - Null steering
KW - Sidelobe control
KW - Spherical microphone array
UR - http://www.scopus.com/inward/record.url?scp=77950181723&partnerID=8YFLogxK
U2 - 10.1109/ASPAA.2009.5346535
DO - 10.1109/ASPAA.2009.5346535
M3 - Conference contribution
AN - SCOPUS:77950181723
SN - 9781424436798
T3 - IEEE Workshop on Applications of Signal Processing to Audio and Acoustics
SP - 113
EP - 116
BT - 2009 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2009
T2 - 2009 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2009
Y2 - 18 October 2009 through 21 October 2009
ER -