Three-dimensional FDTD analysis of radio wave propagation at intersection surrounded by compound walls in residential area for inter-vehicle communications using 720MHz band

The widespread use of automobiles has resulted in a correspondingly high number of car accidents, and this number shows no sign of any significant decline. Many accidents occur at poor-visibility intersections. To avoid such incidents, an inter-vehicle communication (JVC) system has been proposed [l]-[7]. In Japan, with the changeover in terrestrial broadcasting from analog to digital broadcasting, part of 720 MHz band will be newly assigned to the IVC system. It is possible that this system can prevent car accidents at blind spots in such the intersections, because waves of 720MHz band have high diffraction effect relative to those of 5.8-5.9GHz band used in the dedicated short range communication system. Furthermore, the system using 720MHz band could potentially be adapted to prevent short-range emergency collisions.