Title :
Approximate mode filtering
Author :
Wage, Kathleen E.
Author_Institution :
Dept. of Electr. & Comput. Eng., George Mason Univ., Fairfax, VA, USA
Abstract :
Normal modes, the eigenfunctions of the ocean waveguide, are useful in matched field processing and acoustic tomography applications. Mode filter design typically requires exact knowledge of the ocean environment, i.e., the sound speed profile. This paper describes a technique for designing mode filters using modeshapes derived from a uniform WKB-like approximation. The errors introduced by using the approximate modeshapes are analyzed.
Keywords :
acoustic tomography; acoustic waveguides; eigenvalues and eigenfunctions; filtering theory; geophysical signal processing; oceanographic techniques; acoustic tomography applications; approximate modeshapes; eigenfunctions; matched field processing; mode filtering; modeshapes; ocean waveguide; uniform WKB-like approximation; Acoustic propagation; Additive noise; Frequency; Matched filters; Narrowband; Shape measurement; Sonar equipment; Transmission line matrix methods; Underwater acoustics; Velocity measurement;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Eighth Asilomar Conference on
Print_ISBN :
0-7803-8622-1
DOI :
10.1109/ACSSC.2004.1399391
