GPS receiver apparatus and receiving method

Details GPS receiver apparatus and receiving method GPS receiver apparatus and receiving method

2005-06-14

2005-06-14

Jeanglaude, Gertrude A. (Department: 2144)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S214000, C701S215000, C701S300000, C342S357490, C342S357490

Reexamination Certificate

active

06907346

ABSTRACT:
A GPS receiver can periodically obtain range data without degrading the performance such as positioning sensitivity and positioning speed and conserve energy consumption. Supplied with IF data from a frequency conversion section4, a synchronization hold section (6) acquires synchronization of a carrier frequency and phase synchronization of a C/A code, holds the acquired state, and obtains necessary information such as range data. When range data is obtained, a switch (23) is turned off to stop supplying the power to the synchronization hold section (6). A control section (7) executes a positioning operation using the obtained range data and the like, finds and outputs positioning information indicative of a current position. Thereafter, the switch (23) is turned on to restart the synchronization hold section (6). In this manner, control is provided to repeatedly start and stop the synchronization hold section (6).

REFERENCES:
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patent: 6480557 (2002-11-01), Rog et al.
patent: 2002/0149515 (2002-10-01), Alanen et al.
patent: 2003/0161543 (2003-08-01), Tanaka
patent: 2003/0219082 (2003-11-01), Tanaka et al.
patent: 10-73649 (1998-03-01), None
patent: 2001-42023 (2001-02-01), None

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