【摘要】 车载自组网络—VANET(Vehicle Ad Hoc Network)作为移动自组网和传感器网络在道路交通领域的应用,节点具有对等性、高速移动等特点,这导致了VANET无线信道与无线蜂窝网络信道有着显著区别。文中主要研究开阔区域中车辆间通信的无线信道模型:在三维多径散射场景下,考虑配备定向天线的车辆终端,推导VANET双移动通信节点之间无线衰落信道的自相关函数与多普勒功率谱密度函数的解析表达式。该结果对于VANET网络下无线多媒体业务性能评估有着重要的作用。更多还原

【Abstract】 Vehicle Ad Hoc Network(VANET),as an application of Mobile Ad Hoc Network and Sensor Network in highway traffic,has wireless channel characteristics different from traditional wireless cellular network,such as that the nodes are highly mobile,peer-to-peer and so on.This paper mainly studies the channel model for VANET communication in the three-dimensional open area,with assumption that the vehicles are equipped with vertical half-wave dipole antennas,and thus providing analytical expressions for the time-autocorrelation function and the Doppler power Spectrum density function in VANET communication in the three-dimensional SLAC.The experiment results are of significance for evaluating the performance of multi-media traffic in VANET.更多还原