Accession Number : ADD014844

Title :   Acoustic Target Doppler Simulator.

Descriptive Note : Patent, Filed 28 Mar 90, patented 22 Jan 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Johnson, James K

Report Date : 22 Jan 1991

Pagination or Media Count : 4

Abstract : It is useful to a sonar instructor to have a device which simulates Doppler shifting of recorded sonar signals. Such a device can consist of a digitizer operating at a fixed rate storing data in RAM. A variable read rate is calculated based on the desired Doppler shifting. Data are read from RAM at a variable rate higher or lower than the fixed rate and converted D to A before being sent to the student sonar operator.

Descriptors :   ACOUSTICS, ANALOG TO DIGITAL CONVERTERS, CONVERSION, DOPPLER SYSTEMS, INSTRUCTORS, RATES, READING, SHIFTING, SIMULATORS, SONAR, SONAR PERSONNEL, SONAR SIGNALS, STUDENTS, TARGETS, VARIABLES

Subject Categories : Target Direction, Range and Position Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE