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Performance bounds for passive sensor arrays operating in a turbulent medium: Spherical-wave analysis
J. Acoust. Soc. Am. Volume 116, Issue 2, pp. 987-1001 (2004); (15 pages)
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Add to FacebookThe Cramer–Rao lower bounds of the angle-of-arrival estimates for a spherical wave incident on a passive acoustic array are investigated for propagation through a turbulent medium with fluctuations described by a von Kármán spectrum. A single monochromatic source and a line-of-sight propagation path are assumed. The propagation distance, turbulence parameters (characteristic length scale and index-of-refraction variance), phase of the source, and signal-to-noise ratio are also included in the unknown parameter set. The Cramer–Rao lower bounds of the angle-of-arrival estimates are affected by the addition of the propagation distance and source phase as unknowns, and are not affected by the addition of the turbulence parameters and signal-to-noise ratio as unknowns.
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Received 02 Oct 2002
Accepted 05 Apr 2004
Revised 23 Mar 2004
Accepted 05 Apr 2004
Revised 23 Mar 2004
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0001-4966 (print)
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