Locatable mobile cellular telephony terminal
US6061021A · kind A · utility
118Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1997 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Oct 22, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S11/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The mobile cellular telephony terminal includes a radio transmitter/receiver (1) for communicating with base stations of a cellular network, measuring the Doppler velocity of the transmissions originating from the stations and accordingly operating circuits (2) for estimating the velocity of the terminal, by composition of the Doppler velocities, and updating circuits (4, 5) are provided for updating an inertial unit (10) supplying the radio circuit (1) with the position of the terminal, by comparison between a terminal velocity supplied by the unit (10) and the estimated velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.