To easily prevent interference with other radio transmission systems though in a simple configuration.
After frame synchronization is completed, a control part 1 decides whether or not the system code SysID of received radio signals matches a system code SysID stored (registered) in a nonvolatile memory. When the system code SysID does not match, a radio transmission part 2 is immediately stopped, the reception of radio signals is stopped, and the count of an intermittent reception interval is restarted. That is, even when another system using the radio signal of the same frequency is present nearby and the radio signal of the another system is received, since the system code SysID does not match, it is discriminated that the radio signal is the one of the another system and the interference is prevented. Also, since the system code SysID and the identification code of radio equipment TR1 which is a master station are the same, the configuration is simplified.
COPYRIGHT: (C)2008,JPO&INPIT
Takashi Saeki
Bunsho Mukaiyama
Yasuyuki Kawano
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Mizuhiji Katsuhisa
Takeshi Sakaguchi
Hidetoshi Kitade