Title :
Normalized-Orthogonal Projection Beamforming Amid Heavy-Tailed Impulsive Noise of Unknown Statistics
Author :
Li, Hongtao ; Gu, Chen ; Zhu, Xiaohua
Author_Institution :
Dept. of Electron. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
This paper presents a new normalized orthogonal projection (NOP) beamforming technique, against arbitrary unknown heavy-tailed impulsive noises. To improve the performance of the beamformer amid heavy-tailed impulsive noise of unknown statistics, this new algorithm put the weight vector to the noise subspace based on orthogonal projection principles after the input signal being infinity-norm snapshot-normalized. This NOP beamformer is versatile and robust in any impulsive-noise and non-stationary noise model, in the sense that this beamformer is not tailored specifically to any specific impulsive noise model. This new NOP beamformer has these advantages: (1) needing neither prior information nor estimation of the impulsive noise´s effective characteristic exponent´s numerical value, (2) applicable to a wider class of heavy-tailed impulsive noises, (3) providing lower sidelobe and (4) offering better interference-rejection. Monte-Carlo simulation results verify the validity and superiority of the proposed algorithm.
Keywords :
Monte Carlo methods; array signal processing; statistics; Monte-Carlo simulation; heavy-tailed impulsive noise; impulsive-noise model; interference-rejection; non-stationary noise model; normalized-orthogonal projection beamforming; orthogonal projection principles; unknown statistics; Acoustic beams; Array signal processing; Arrays; Interference; Noise; Signal processing algorithms; Array signal processing; Beamforming; Impulsive noise.; Orthogonal projection;
Conference_Titel :
Multimedia and Signal Processing (CMSP), 2011 International Conference on
Conference_Location :
Guilin, Guangxi
Print_ISBN :
978-1-61284-314-8
Electronic_ISBN :
978-1-61284-314-8
DOI :
10.1109/CMSP.2011.22