To more speedily and accurately search synchronism establishment regarding a positioning satellite signal.
This receiver comprises a high-speed mode and a high-sensitivity mode. During the high-speed mode, a practical phase change width of a receiving-side spreading code is great when establishing synchronism for a spreading code of a received signal by detecting a correlation between the spreading code of the received signal from a satellite and the receiving-side spreading code while practically changing a phase of the receiving-side spreading code. During the high-sensitivity mode, the practical phase change width is small. A mode switching operation means is provided for accepting a switching selection operation of the high-speed mode and the high-sensitivity mode. A synchronism establishing means carries out the establishment of synchronism by setting a mode that has been switched by the mode switching operation means as a present mode.
COPYRIGHT: (C)2007,JPO&INPIT
Takayasu Muto
Katsuyuki Tanaka
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