System and method of improving sampling of WLAN packet information to improve estimates of Doppler frequency of a WLAN positioning device
US7768963B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2007 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Jul 6, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods of improving sampling of WLAN packet information to improve estimates of Doppler frequency of a WLAN positioning device. A device estimates the position of itself. The device includes a WLAN radio module for receiving WLAN signals transmitted by WLAN APs in range of said device, extraction logic for extracting information from said received WLAN signals to identify the WLAN APs, and logic to cooperate with a WLAN-based positioning system to estimate the position of the device based at least in part on the extracted information identifying the WLAN APs in the range of said device. The WLAN radio module includes logic for measuring multiple received signal strength indicator (RSSI) values for sufficiently long WLAN packets to increase the sampled rate of RSSI of WLAN packets from WLAN APs and to thereby improve an estimate of the Doppler frequency of said device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.