COMMUNICATION SYSTEM BETWEEN ROAD AND VEHICLE

摘要

Road transmission antennas (4a, 4b) are arranged along the road, and the road transmission antennas (4a, 4b) radiate radio waves of the same frequency and the same contents in the same cell (E). On-board devices (3) that receive the radio waves radiated from the road transmission antennas (4a, 4b) are adapted for directional diversity reception. Even if a small car enters a shadow region caused by large car, a communication between the small car and the road may not be interrupted.