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Improvement of delay measurements from sonar arrays via sequential state estimation

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3 Author(s)
Kirlin, R.L. ; University of Wyoming, Laramie, WY ; Moore, D. ; Kubichek, R.F.

A state-space formulation allows use of Kalman estimation to improve error variance in the measurement of signal delay between sensors by 1) using all-pair measurements, 2) a priori information, and 3) sequential estimation. The formulation is generalized to M sensors in line and results are investigated in detail for M = 3 for extremes of a priori information and measurement error covariance. Use of a priori information for practical range situations gives up to a factor of four error variance improvement. A priori beating information may give more improvement.

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Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:29 ,  Issue: 3 )