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A Lower Bound of DOA-Estimates by an Array Randomly Subject to Sensor-Breakdown

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4 Author(s)
Wong, K.T. ; Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Kowloon, China ; Wu, Y.I. ; Yu-Sheng Hsu ; Yang Song

This paper introduces a new metric, to approximately lower-bound the error-variance in the estimation of an incident source's direction-of-arrival (DOA), for a sensor-array subject to random breakdown in its individual sensors. This new metric equals a weighted sum of Cramér-Rao bounds, each conditioned on a distinct event of sensors-breakdown. Those distinct events together describe the overall random phenomenon of the fallibility of the sensors that constitute the sensor-array. This new metric's tightness as an approximate lower bound is illustrated by Monte Carlo simulations of the maximum-likelihood estimator.

Published in:

Sensors Journal, IEEE  (Volume:12 ,  Issue: 5 )

Date of Publication:

May 2012

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