Title :
On the performance of conventional and unconventional towed arrays
Author :
Edelson, G.S. ; Tufts, D.W.
Author_Institution :
Underwater Acoust. Technol., BAE Syst., Nashua, NH, USA
Abstract :
Insights, simplified formulas, and figures are provided to aid in the design of passive hydrophone array systems. The conventional passive towed array (CTA), the fixed-position array (FPA), and the spatially-referenced towed array (SPARTA) are all considered. The CTA is of considerable interest because of its use for synthetic aperture processing. The SPARTA, an alternative array design that has previously been shown to improve upon CTA performance, consists of two subarrays which have different velocities. The investigation is made through the generation of several simplified Cramer-Rao lower bound (CRLB) expressions and through a geometric approach based on concentration ellipses that reveals important features about the joint estimation of bearing and frequency
Keywords :
acoustic signal processing; acoustic transducer arrays; array signal processing; direction-of-arrival estimation; frequency estimation; hydrophones; signal representation; Cramer-Rao lower bound; bearing estimation; concentration ellipses; conventional passive towed array; fixed-position array; frequency estimation; geometric approach; joint estimation; passive hydrophone array systems; signal representation; spatially-referenced towed array; subarrays; synthetic aperture processing; unconventional towed arrays; Direction of arrival estimation; Doppler shift; Electronic warfare; Frequency estimation; Military computing; Motion estimation; Phase estimation; Phased arrays; Sonar equipment; Underwater acoustics;
Conference_Titel :
OCEANS, 2001. MTS/IEEE Conference and Exhibition
Conference_Location :
Honolulu, HI
Print_ISBN :
0-933957-28-9
DOI :
10.1109/OCEANS.2001.968090
