| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device for radio communication between cars wherein interference and incorrect recognition are prevented as much as possible and power consumption is suppressed with simple configuration. <P>SOLUTION: This device comprises a transmission power control circuit 6 for controlling transmission power; a signal processing circuit 2 for functioning as a control unit of the communication device, for carrying out radio communication with an adjacent running car, and outputting a transmission power control signal to the transmission power control circuit 6; and a car speed signal generating circuit 5 for outputting car speed data of that car itself and the output thereof being connected to the signal processing circuit 2. The transmission power is increased in proportion to the increase of the car speed by the transmission power control circuit 6 receiving the transmission power control signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
