Apparatus for transmitting positioning signal, positioning system including the apparatus, and system for transmitting positioning signal
US7817090B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 3, 2006 |
| Grant date | Oct 19, 2010 |
| Priority date | — |
| Expiry date | Jul 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus that can transmit a signal enabling higher accuracy of calculating positional information is provided. A transmitting apparatus transmitting a positioning signal includes an oven controller crystal oscillator (OCXO) having a thermostatic oven that keeps the temperature of a quartz resonator constant and oscillates such that variation in output frequency caused by the ambient temperature change is minimized, a voltage controlled oscillator (VCO) outputting a signal modulated in accordance with the signal from OCXO, multipliers, a code generator outputting code patterns for respectively identifying each of artificial satellites on which the transmitting apparatus is mounted to multiplier, a memory storing a navigation message, a transmitting portion, and an antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.