Acoustic Target Doppler Simulator.
Patent, Filed 28 Mar 90, patented 22 Jan 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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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.
- Target Direction, Range and Position Finding