| 摘要 |
A communications system comprises a communications apparatus and one or more repeater stations. The communications apparatus configures a signal for transmission on a first carrier frequency and for transmission on a third carrier frequency, and converts the third carrier frequency to a second carrier frequency for transmission to a remote repeater station for retransmission on the third carrier frequency to forma repeated signal. In particular the invention lies in private mobile radio communication systems like TETRA, P25 or APCO-25 Land Mobile Radio system. |
