Pulse coded sonar having improved doppler determination feature
US5648940A · kind A · utility
2Cited by
6References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1968 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Jan 23, 1988 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/582
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The signal appearing at the receiver input of a pulse code active sonar dng a return echo period, is sampled, time compressed and stored in a memory. The time compressed sample is successive read-out of memory, with each individual "read-out" hetrodyned with a discretely different doppler compensation frequency signal. The successively processed read-outs are passed through an "on line" correlation detection device to determine presence of a correctly compensated pulse code echo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.