Research on the development of car crash avoidance system using UHF band by ITS technology

本研究利用ITS技术开发了基于UHF频段的汽车防撞系统。重点研究了以下几个方面：1)交叉口的三维电波传播，2)UHF频段车载天线电场分布的距离依赖性，3)到达方向估计方法的改进，4)基于GPU的高速FDTD模拟器，5)基于RF-ID标签的车辆导航系统。结果为系统的开发提供了新的知识和技术，获得了大量的数值数据。

In this research, the development of car crash avoidance system using UHF band by ITS technology was carried out. In particular, the following items were investigated; 1) three-dimensional radio wave propagation at an intersection, 2) distance dependence of electric field distribution for an antenna mounted on a car in UHF band, 3) improvement of direction-of-arrival estimation method, 4) high speed FDTD simulator using GPUs, 5) vehicle navigation system using RF-ID tags. As a result, new knowledge and technologies, significant numerical data for the system development were obtained.