Positioning apparatus
US7764227B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | May 1, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/256
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A positioning apparatus includes a correlator 30 for calculating a correlation between the pseudo pattern code of each of satellites 1 and 2 and each of SPS signals associated with the satellites 1 and 2, and for outputting a correlation value indicating the correlation, sets up effective ranges δ1 and δ2 for the correlation values outputted from the correlator 30 on the basis of a pseudo distance PR1 between the satellite 1 and a SPS reference station 4, and a pseudo distance PR2 between the satellite 2 and the SPS reference station 4, and detects peak values which fall within the effective ranges δ1 and δ2, respectively. As a result, the positioning apparatus can determine the current position correctly even under a receiving environment in which the electric waves directly from the satellites 1 and 2 may become weak.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.