Digital sonar system
A transponder of an active digital sonar system identifies a multifrequency underwater activating sonar signal received from a remote sonar transmitter. The transponder includes a transducer that receives acoustic waves, including the activating sonar signal, and generates an analog electrical receipt signal. The analog electrical receipt signal is converted to a digital receipt signal and cross-correlated with a digital transmission signal pattern corresponding to the activating sonar signal. A relative peak in the cross-correlation value is indicative of the activating sonar signal having been received by the transponder. In response to identifying the activating sonar signal, the transponder transmits a responding multifrequency sonar signal. 4 figs.
- Research Organization:
- Univ. of Washington, Seattle, WA (United States)
- DOE Contract Number:
- FG06-91ER40614
- Assignee:
- Univ. of Washington, Seattle, WA (United States)
- Patent Number(s):
- US 5,469,403/A/
- Application Number:
- PAN: 7-929,881
- OSTI ID:
- 131936
- Resource Relation:
- Other Information: PBD: 21 Nov 1995
- Country of Publication:
- United States
- Language:
- English
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