Relative inter-vehicle position calculation apparatus,...

Details Relative inter-vehicle position calculation apparatus,... Relative inter-vehicle position calculation apparatus,...

2008-11-24

2010-10-12

Phan, Dao L (Department: 3662)

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

Directive

Including a satellite

Reexamination Certificate

active

07812762

ABSTRACT:
An on-board communication equipment on each of two vehicles receives a radio wave from two or more GPS satellites, and determines a carrier wave phase of the received radio wave. Then, the on-board communication equipment on one vehicle receives, from the other vehicle, information on the carrier wave phase observed in the other vehicle. Further, the on-board communication equipment calculates a relative position of a self vehicle relative to the other vehicle by a Carrier-Phase DGPS positioning based on a difference between two carrier wave phases (e.g., single difference, double difference or the like), that is, one from the self vehicle and one from the other vehicle, both having the same observation time, from among the available carrier wave phases.

REFERENCES:
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patent: WO 2006/043123 (2006-04-01), None
Hiroshi Isshiki, “Observation Equation”, May 5, 2003.
Shinya Okamoto, study on “The Positioning Accuracy of Long Baseline Code-DGPS and Carrier-Phase-DGPS”, Tokyo University of Mercantile Marine, 2003.
Tomoji Takasu, “Precise Positioning Theory and Analysis With Carrier-phase Measurements”, Sep. 25, 2007.
Office action dated Dec. 1, 2009 in corresponding Japanese Application No. 2007-313279.

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