Accession Number : ADA189790

Title :   Spatial Matched Processing for Multipath Propagation.

Descriptive Note : Technical memo no. 121,

Corporate Author : MICHIGAN UNIV ANN ARBOR COMMUNICATIONS AND SIGNAL PROCESSING LAB

Personal Author(s) : Dzieciuch, Matthew A ; Birdsall, T G

PDF Url : ADA189790

Report Date : 16 Nov 1987

Pagination or Media Count : 40

Abstract : Underwater acoustic propagation is characterized by multipath or multimode propagation. Ray theory and mode theory are not fully adequate for modeling physical reality. Impulses responses can be more accurately calculated using Gaussian beam theory. Signal processors can be designed to take advantage of the channel complexity if the propagation is actually known so that detectability is increased. The proposed technique, channel matched filtering, synthetically backpropagates the wave front to a hypothesized source location. Accurate passive estimates can be made without knowledge of signal characteristics. GB theory can easily accommodate a range-dependent deep water environment. Keywords include: Signal processing, Underwater acoustic propagation, and Channel matched filtering.

Descriptors :   *SIGNAL PROCESSING, *SIGNALS, *SOUND TRANSMISSION, *SPATIAL DISTRIBUTION, *UNDERWATER ACOUSTICS, BEAMS(RADIATION), CHANNELS, MATCHED FILTERS, MATCHING, MULTIMODE, MULTIPATH TRANSMISSION, PROPAGATION, SOURCES, THEORY, WAVEFRONTS

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE