| 摘要 |
PROBLEM TO BE SOLVED: To allow the equipment to send/receive simultaneously two communication data or over whose transfer rate differs from each other, to make the processing efficient and to enhance the reliability. SOLUTION: A center frequency of a high frequency signal used for the communication of the direct spread system is shifted to a frequency band at the outside of a frequency band of a disturbing wave via a disturbance detector 26, a center frequency controller 27, and a frequency synthesizer 8 on the occurrence of the disturbing wave. When the center frequency of the high frequency signal is revised by the center frequency controller 27 and the frequency synthesizer 8, a hopping pattern in a hopping table 15 used for the communication of the frequency hopping system is controlled by a hopping pattern controller 28 in response to the revision of the center frequency. Thus, the effect on the direct spread signal due to the disturbing wave is surely eliminated, signals in both the communication systems are surely separated to prevent the interference. |
