| 摘要 |
A frequency stabilized communication system comprising Doppler -shift detective and corrective unit and dual-carrier radio receiver is employed to decrease a Doppler frequency-shift effect due to relative movement between mobile station and base one, drifts of local oscillation signals of receivers and transmitters. The dual-carrier receiver completes the frequency selection and frequency conversion with utilizing mixture of local oscillation signal of receiver and dual-carrier signal itself so that effect to frequency-drift is reduced, and power consumption of local oscillation generator is controlled. Due to applying the Doppler-shift detective and corrective unit, the frequency of reception and transmission of mobile station will be remotely real-time controlled by base station or be by mobile one itself directly as the movement state of that changes, which avoid the adjacent channel interference from the transmission of mobile station against the receiver of base one and balance from the receiver of mobile one against signal.
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