Portable terminal

Details Portable terminal Portable terminal

2008-06-23

2010-11-23

Tarcza, Thomas H (Department: 3662)

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

Directive

Including a satellite

Reexamination Certificate

active

07839326

ABSTRACT:
According to one embodiment, a portable terminal includes: a display unit that displays a present location of the portable terminal; a GPS receiver that calculates theoretical precision data determined theoretically by geometric arrangement of plural GPS satellites on the basis of location information of the GPS satellites, and performs a positioning process by which positioning data for indicating the present location of the portable terminal is calculated using arrival time of the radio wave; and a control unit that repeats the positioning process performed by the GPS receiver plural times to calculate a cumulative average of the positioning data, and calculates a difference between the cumulative average of the theoretical precision data and the cumulative average of the positioning data to display a cumulative average of the positioning data, when the difference equal to or less than a predetermined value successively continues predetermined number of times, as the present location of the portable terminal.

REFERENCES:
patent: 6295022 (2001-09-01), Dutka
patent: 2008/0246661 (2008-10-01), Nagahara et al.
patent: 2002-243832 (2002-08-01), None
patent: WO 98/02762 (1998-01-01), None

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