Differential phase measurement through antenna multiplexing
US5268695A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Oct 6, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/54
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An embodiment of the present invention is a system for time multiplexing a carrier signal received by two or more GPS antennas through a single hardware path, using a single receiver's oscillator in that hardware path as a reference to compare the phase from each antenna. One of the antennas is designated as a reference antenna and a carrier signal received by it is used to phase lock in numerically controlled oscillator. The same carrier signal received by the other antennas is periodically compared in phase to the output of the numerically controlled oscillator. Each comparison results in a phase angle measurement for the respective antennas compared to the master antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.