| 摘要 |
PROBLEM TO BE SOLVED: To correct a Doppler effect for a radio communication network with a mobile (radio station of mobile object) by measuring the transition of reciprocative frequency between a current base station and the mobile at the current base station, transmitting a frequency correction value as the function of that frequency transition from the base station to the mobile and correcting the local frequency reference of the mobile. SOLUTION: While using a frequency controller for slaving the reciprocative frequency transition (2.ΔFD1±ΔFM) between a current base station and a mobile to a reception frequency, the current base station measures this frequency transition. In this case, ΔFD1 is Doppler shift based on the move of the mobile and ΔFM is the deviation of the transmission frequency of the mobile from a theoretical frequency value. The current station transmits this measured value through a communication channel established with the mobile. The mobile substracts and corrects its own local frequency reference just for a value equal with the almost 1/2 received value (2.ΔFD1±ΔFM). |
