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Linearly constrained minimum-"geometric power" adaptive beamforming using logarithmic moments of data containing heavy-tailed noise of unknown statistics

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3 Author(s)
Jin He ; Nanjing Univ. of Sci. & Technol., Nanjing ; Zhong Liu ; Wong, K.T.

This letter presents a new adaptive beamforming approach, against arbitrary algebraically tailed impulse noise of otherwise unknown statistics. (This includes all symmetric alpha-stable noises with infinite variance or even infinite mean.) This new beamformer iteratively minimizes the "geometric power" of the beamformer's output Y, subject to a prespecified set of linear constraints. This geometric power is defined in terms of the "logarithmic moment" E{log|Y|}, as an alternative to the customary "fractional lower order moments" (FLOM). This logarithmic-moment beamformer offers these advantages over the FLOM beamformer: (1) simpler computationally in general, (2) needing no prior information nor estimation of the numerical value of the impulse noise's effective characteristic exponent, and (3) applicable to a wider class of heavy-tailed impulse noises.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:6 )