Title :
Local polynomial approximation based beamforming for localization of rapidly moving sources
Author :
Katkovnik, Vladimir ; Gershman, Alex B.
Author_Institution :
Int. Center for Signal Process., Tampere Univ. of Technol., Finland
Abstract :
A windowed local polynomial approximation (LPA) of time-varying directions-of-arrival (DOA) is exploited to derive a new form of beamformer for source localization and tracking in highly nonstationary environments. The relationship between our LPA-beamformer and the conventional beamformer is derived. Closed-form expressions are obtained for the bias and variance of the LPA-beamformer in the nonstationary case and the problem of optimal window choice is discussed
Keywords :
array signal processing; direction-of-arrival estimation; polynomial approximation; tracking; DOA; beamformer; closed-form expressions; highly nonstationary environments; local polynomial approximation; optimal window choice; rapidly moving sources; sensor array; source localization; time-varying directions-of-arrival; tracking; uniform linear array; Array signal processing; Closed-form solution; Direction of arrival estimation; Gaussian noise; Motion estimation; Polynomials; Sensor arrays; Signal processing; Signal processing algorithms; Tracking;
Conference_Titel :
Sensor Array and Multichannel Signal Processing Workshop. 2000. Proceedings of the 2000 IEEE
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-6339-6
DOI :
10.1109/SAM.2000.877974
