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Local polynomial approximation based beamforming for localization of rapidly moving sources

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2 Author(s)
Katkovnik, V. ; Int. Center for Signal Process., Tampere Univ. of Technol., Finland ; Gershman, A.B.

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

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Sensor Array and Multichannel Signal Processing Workshop. 2000. Proceedings of the 2000 IEEE

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