Doppler compensator for heterodyne correlation devices
US4207625A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1961 |
| Grant date | Jun 10, 1980 |
| Priority date | — |
| Expiry date | Mar 6, 1981 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/904
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
2. In a sonar communication system, a transceiver for receiving doppler sals, a local oscillator for producing a first output signal of given frequency, a translation resolver connected to said local oscillator for regulating said first output signal, a modulator connected to said transceiver and said translation resolver for mixing said received doppler signals and said regulated first output signal, a filter coupled to said modulator for filtering said mixed signals, a precision clock oscillator adapted for producing a second output signal, a proportional resolver electrically coupled to said precision clock oscillator for regulating the frequency of said second output signal, a signal generator connected to said proportional resolver and driven by said regulated second output signal for generating a third output signal, a filter coupled to said signal generator for filtering said third output signal, a correlator electrically coupled to the outputs of said mixed signal filter and said third output signal filter for correlation thereof, a drive motor, means connected to said drive motor for regulating the speed and rotation thereof, and gear means interconnecting said drive motor…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.