Network-assisted global positioning systems, methods and terminals including doppler shift and code phase estimates
US7155340B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 2004 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Feb 12, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/18513
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A mobile terminal is configured to receive wireless communications including GPS data from a terrestrial and/or satellite wireless network, and to perform pseudo-range measurements using the GPS data that is received. The mobile terminal may be configured to perform pseudo-range measurements by receiving GPS coarse/acquisition (C/A) signals from GPS satellites, estimating Doppler shifts in the received GPS C/A signals, and estimating received code phases of the GPS C/A signals using the Doppler shifts that are estimated. The estimated code phases and/or the estimated Doppler shifts of the GPS C/A signals can provide the pseudo-range measurements. By removing the Doppler shift from the received signal samples prior to performing the code phase measurement, reduced computational complexity and/or processing time may be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.