Time reversal and the spatio-temporal matched filter

Journal Article · Mon Mar 08 00:00:00 EST 2004 · Journal of the Acoustical Society of America

OSTI ID:15014018

Lehman, S K; Poggio, A J; Kallman, J S; Meyer, A W; Candy, J V

It is known that focusing of an acoustic field by a time-reversal mirror (TRM) is equivalent to a spatio-temporal matched filter under conditions where the Green's function of the field satisfies reciprocity and is time invariant, i.e. the Green's function is independent of the choice of time origin. In this letter, it is shown that both reciprocity and time invariance can be replaced by a more general constraint on the Green's function that allows a TRM to implement the spatio-temporal matched filter even when conditions are time varying.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 15014018
• Report Number(s): UCRL-JRNL-202956; JASMAN; TRN: US200803%%988
• Journal Information: Journal of the Acoustical Society of America, Vol. 116, Issue 3; ISSN 0001-4966
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUMM MECHANICS
GENERAL PHYSICS
ACOUSTICS
FOCUSING
MIRRORS
ORIGIN