Method and apparatus for locating a wireless user
US8155017B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2008 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Nov 7, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A plurality of antennas transmit a first spread spectrum signal having an associated code. The first spread spectrum signal is received at the wireless user. For each received first spread spectrum signal, a second spread spectrum signal is transmitted having an associated code having a same phase as that received first spread spectrum signal. The second spread spectrum signals are received at the plurality of antennas. A distance measurement is determined between each antenna and the wireless user based on in part a received timing of the second signals. The wireless user's location is determined based on in part the distance determinations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.