Aisin Seiki Kabushiki Kaisha

Japan Radio Co., Ltd.

Koichi Washizu

Yuichi Murakami

Tomio Yasuda

Toshimitsu Oka

Tomohiro Yamamoto

Chogo Sekine

Seiji Ishikawa

Yorihisa Suwa

Toshihiro Kawazoe

Yukio Yokoi

A GPS signal receiver has a PN code generator for producing a PN code identical to a PN code in a received GPS signal which is transmitted from a GPS satellite, the PN code produced by the PN code generator being controllable in phase, a PN code correlator for correlating the received GPS signal with the PN code produced by the PN code generator so as to code-strip the received GPS signal, a signal search unit for monitoring a correlated output signal from the PN code correlator and controlling the phase of the PN code produced by the PN code generator to search for a correlated output signal in excess of a predetermined value, a signal determining unit for determining the correlated output signal in excess of the predetermined value as being produced by a direct wave of the GPS signal, and a signal tracking unit for controlling the phase of the PN code produced by the PN code generator to track a peak of the correlated output signal that is determined as being produced by the direct wave of the GPS signal.

Signal receiver for global positioning system

Growing community of inventors

Mitaka, Japan

Koichi Washizu