A generalized Cramér-Rao lower bound for moving arrays

By properly including the forward motion of the array in the signal model, improved bearing estimation performance for a towed line array can be obtained. The improvement is a consequence of utilizing the bearing information contained in the Doppler. In this paper, it is shown by use of the Cramér-R...

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Published in:The Journal of the Acoustical Society of America 2009-02, Vol.125 (2), p.EL51-EL57
Main Author: Sullivan, Edmund J.
Format: Article
Language:English
Subjects:
Acoustic signal processing
Acoustics
Bayes Theorem
Computer Simulation
Doppler Effect
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Models, Theoretical
Motion
Physics
Pressure
Signal Processing, Computer-Assisted
Time Factors
Transducers, Pressure
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description By properly including the forward motion of the array in the signal model, improved bearing estimation performance for a towed line array can be obtained. The improvement is a consequence of utilizing the bearing information contained in the Doppler. In this paper, it is shown by use of the Cramér-Rao lower bound that, as the array moves forward, the variance on the bearing estimate for an array of pressure sensors decreases, and that if an array of pressure-vector sensors is used, a significant improvement over that obtained for the array using pressure sensors only is obtained.
doi_str_mv 10.1121/1.3040020
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subjects Acoustic signal processing
Acoustics
Bayes Theorem
Computer Simulation
Doppler Effect
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Models, Theoretical
Motion
Physics
Pressure
Signal Processing, Computer-Assisted
Time Factors
Transducers, Pressure
title A generalized Cramér-Rao lower bound for moving arrays
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