| 摘要 |
A communication device able to realize a positioning computation at the high speed and able to reduce electric power consumption, wherein a host CPU obtains the error value of the reference frequency of a crystal oscillator from a GPS receiver, stores that in a storage unit, transmits this value to the GPS receiver as the next positioning computation to correct the reference frequency, and makes to search a GPS satellite, therefore the electric power need not to be supplied to the GPS receiver and the crystal oscillator, and the position- finding result can be obtained at the high speed and with reducing the electric power consumption.
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