DTIC ADA626739: Localization of Short Duration Periodic Signals

by: Defense Technical Information Center

Publication date: 2013-09-30

Topics: DTIC Archive, , NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI, *ACOUSTIC SIGNALS, *SIGNAL PROCESSING, ACOUSTIC ARRAYS, PATENT APPLICATIONS, POSITION(LOCATION),

Collection: dticarchive; additional_collections

Language: English

A method for localizing signals of interest includes initializing characteristics of the signals. Signals are acquired from a sensor array having at least three acoustic sensors. After digitization and conditioning, the signals associated with each sensor are validated by comparison with initialized characteristics. The signals are correlated across sensor groups to obtain time differences of arrival (TDOA). These TDOA are validated and associated with other TDOA from different times. TDOA from different sensor pairs are associated when they share a common sensor. A hyperbola of possible locations is created for each validated TDOA. Summation of the hyperbolas gives an intensity function. The location is identified as the most intense point in the intensity function. The source can be tracked across time as a computer output.