| 摘要 |
PURPOSE: A network synchronization apparatus of a mobile communication system base station is provided to reduce the cost and compensate for an error when the error occurs in a network synchronization apparatus by separating an oscillator from a GPS receiver so that GPS receivers common use one oscillator. CONSTITUTION: A plurality of GPS receivers(111,117) receive a plurality of GPS signals, correct an error with respect to the GPS signals and output a reference signal, The GPS receivers(111,117) divides an inputted output signal and provide a synchronous signal to a base station. An oscillator(116) outputs the output signal according to the reference signal from the GPS receivers(111,117) to the GPS receivers(111,117). A GPS engine(112) receives the plurality of GPS signals from a plurality of satellites. A digital phase locked loop controller(113) senses and corrects an error with respect to the GPS signals. A variable frequency oscillator(114) multiplies, decreases, or mixes an oscillating frequency based on the output signal from the oscillator(116) and outputs a stable frequency.
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