Accession Number : AD0674371

Title :   AN ADAPTIVE-CORRELATION SYSTEM FOR PROCESSING SONAR MULTIPATH ARRIVALS.

Descriptive Note : Research and development rept. Nov 65-Nov 67,

Corporate Author : NAVAL UNDERSEA WARFARE CENTER SAN DIEGO CALIF

Personal Author(s) : Pos,N. D.

Report Date : NOV 1967

Pagination or Media Count : 34

Abstract : A system developed at NUWC improves gain in the processing of multipath arrivals in studies of underwater-sound correlation using pseudorandom-noise codes. The system correlates the arriving signal against an accumulated picture of the recent history of the medium, rather than against the perfect replica of the expected signal commonly used in the past. Typical results obtained from laboratory-simulated multipaths are exhibited and described. (Author)

Descriptors :   (*SONAR SIGNALS, PROCESSING), SOUND TRANSMISSION, UNDERWATER SOUND, ADAPTIVE SYSTEMS, CORRELATORS, CORRELATION TECHNIQUES, MULTIPATH TRANSMISSION, DIAGRAMS, GAIN, NOISE, SIMULATION

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE