| 摘要 |
PURPOSE:To improve the efficiency of system without requiring the broadcast of satellite distance information and to relieve the processing load by a peripheral station by allowing a reference station to apply reception synchronizing control correcting the variation of satellite delay for peripheral stations. CONSTITUTION:In order to synchronize the reception, a transmission timing generator 2 uses a specific oscillator 9 to generate a transmission timing signal 101, which is used as a start signal to start a range finding counter 7. On the other hand, based on a unique word detection signal 102 generated by the unique word detector 5 of the range finding section 1, the reception timing signal 103 is generated by a frame synchronizing section 6, the signal used as the stop signal stops the range finding counter 7 to measure the satellite delay during this time. Based on the satellite delay and a standard reception offset 31, a range finding value generator 8 calculates the reception offset 104, which is sent to the reception timing generator 3. The reception synchronization is established by sending the value to a reception TDMA control section 13 in the data reception section 11. |
