摘要
无线信道特性直接影响车载通信系统性能,采用合理的方法准确地刻画V2V通信信道尤为重要。研究了低车流密度下的高速公路上(V2V)通信信道,考虑到应用环境中存在移动和静态散射体,且收发两端处于移动状态,采用几何随机分析方法,在双侧双环模型基础上推导出其时间自相关函数(ACF)、空间互相关函数(CCF)和功率谱密度(PSD)等表达式,并建立仿真模型。仿真及实验结果表明,在车辆同向及反向两种情形下,理论与测量数据的均方根误差(RMSE)仅为1. 65和2. 59,理论与测量的接近一致验证了本模型的实用性和普适性。
The characteristics of wireless channel directly affect the performance of vehicular communication system. It is particularly important to use a reasonable method to accurately characterize the vehicle-to-vehicle( V2 V) communication channel. In this paper,the V2 V communication channel on expressway with low traffic density is studied. Considering the mobile and static scatters in the application environment and the two receiving and transmitting ends which are in moving state,a stochastic geometric analysis method is used to derive the V2 V communication channel. The expressions of auto correlation function( ACF),cross correlation function( CCF)and power spectrum density( PSD) are established and a corresponding simulation model is obtained. Simulation and experimental results show that the root mean squared error( RMSE) of the theoretical and measured data is only 1. 65 and 2. 59 respectively in the same direction and in the reverse direction of the vehicle,their close agreement verifies the practicality and universality of this model.
出处
《电子测量与仪器学报》
CSCD
北大核心
2018年第9期80-87,共8页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(51777050)、国家自然科学基金(51577046)、国家自然科学基金重点项目(51637004)
国家重点研发计划“重大科学仪器设备开发”项目(2016YFF0102200)资助
关键词
智能交通
车载通信
几何散射
相关函数
功率谱密度
intelligent transportation system(ITS)
car communication
geometric scattering
related functions
power spectrum density
