| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a receiver capable of ensuring high reception quality, capable of inhibiting a dynamic range of a radio signal concurrently incoming from a plurality of points in different directions, incoming from a plurality of directions. <P>SOLUTION: A receiver 100 is installed beside or over a road 200 and receives a radio signal transmitted from a traveling transmitter installed on a vehicle 400 traveling on the road 200. The receiver 100 comprises: a non-directional antenna part 111 which receives a radio signal; and a receiver sensitivity adjustment part 112 which physically adjusts receiver sensitivity of the non-directional antenna part 111 against a radio signal incoming from the outside of the receiver 100 according to a distance between the receiver 100 and the traveling transmitter. <P>COPYRIGHT: (C)2012,JPO&INPIT |
