Locatable mobile cellular telephony terminal

Details Locatable mobile cellular telephony terminal Locatable mobile cellular telephony terminal

1997-10-22

2000-05-09

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

34235705, 34235714, 342457, G01S 352

Patent

active

060610212

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.

REFERENCES:
patent: 3702477 (1972-11-01), Brown
patent: 5504491 (1996-04-01), Chapman
patent: 5551059 (1996-08-01), Hutcheson et al.
patent: 5625668 (1997-04-01), Loomis et al.
patent: 5706014 (1998-01-01), Abbasi
patent: 5748147 (1998-05-01), Bickley et al.
patent: 5906655 (1999-05-01), Fan

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