| 摘要 |
<p>PURPOSE:To provide the network synchronization system in which clock synchronization is established with high accuracy without causing a frequency deviation by the independent synchronization network. CONSTITUTION:A modified clock signal generating means generating a modified clock signal corresponding to relative moving speed with respect to a stationary station is provided to a network synchronization device 8 being a mobile station. The modified clock signal generating means includes plural oscillators 1-3 to oscillate plural original clock signals whose frequency differs and a selection means selecting one of the plural original clock signals as a modified clock signal in response to a moving speed. Through the constitution above, Since the network synchronization device 8 selects at any time any of the oscillators 1-3 in response to a change in the mobile speed and sends a proper modified clock signal (original clock signal) as a reference clock signal, the frequency fluctuation due to the Doppler effect with respect to the reference clock signal is minimized by a receiver 6.</p> |
