Utilization of Entire Transmitted Bandwidth in Continuous Transmission FM Sonar.
Patent, Filed 11 Jan 82, patented 15 May 84,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A continuous transmission FM sonar avoids target ambiguities while utilizing the entire transmitted bandwidth for echo analysis. The sonar is characterized by digital generation of direct and quadrature versions of the transmitted frequency sweep, and balanced modulators responsive thereto to effect complex demodulation of the returned signals prior to analysis, as by a fast fourier transform frequency analyzer for target detection.
- Acoustic Detection and Detectors
- Target Direction, Range and Position Finding