Mitsubishi Electric Corporation

Magellan Systems Japan, Inc.

Takayoshi Nakamoto

Seiichiro Hirata

Fumio Ueda

A positioning apparatus includes a correlatorfor calculating a correlation between the pseudo pattern code of each of satellitesandand each of SPS signals associated with the satellitesand, and for outputting a correlation value indicating the correlation, sets up effective rangesandfor the correlation values outputted from the correlatoron the basis of a pseudo distance PRbetween the satelliteand a SPS reference station, and a pseudo distance PRbetween the satelliteand the SPS reference station, and detects peak values which fall within the effective rangesand, respectively. As a result, the positioning apparatus can determine the current position correctly even under a receiving environment in which the electric waves directly from the satellitesandmay become weak.

Growing community of inventors

Chiyoda-ku, Japan

Takayoshi Nakamoto