Method and system for locating an unknown transmitter using calibrated oscillator phases
US5594452A · kind A · utility
19Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1994 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Dec 1, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method and system for locating an unknown transmitter which emits an interfering signal, multiple signals, including a phase-calibrating signal and the interfering signal, are simultaneously observed within a passband. These signals are then simultaneously cross-correlated. The phase-calibrating signal is then isolated from the cross-correlated signals and processed to determine an amount of offset to compensate for frequency fluctuations between local oscillators in satellites, which receive and retransmit the phase-calibrating signal and the interfering signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.