摘要
针对车对车通信信道场景复杂多变且不易用硬件模拟复现的特点,通过引入车辆行驶速度及方向二维参数,构建了一种基于几何随机方法的非平稳多输入多输出信道简化模型,该模型可支持移动发射端和移动接收端任意运动轨迹。在此基础上,设计并实现了一个基于现场可编程逻辑阵列器件硬件平台的车车信道模拟器方案,并给出了离散化信道参数的计算和硬件模拟方法。实测结果表明,该模拟器输出的时延功率谱和多普勒功率谱能够有效模拟车车动态场景下信道的非平稳特性,并且与理论仿真结果相吻合,因而可用于车载通信设备的方案验证、算法优化和性能测试等领域。
Due to the complexity of vehicle-to-vehicle(V2V)communication scenarios,hardware emulation of V2V channels is difficult.By introducing the parameters of speed and direction of vehicles,a modified V2V multiple-input multiple-output(MIMO)channel model based on the non-stationary geometry-based stochastic method is proposed in this paper.The new model allows arbitrary trajectories of the mobile transmitter(MT)and mobile receiver(MR).On this basis,a new hardware realization scheme based on the field programmable gate array(FPGA)platform is designed and implemented.The computation and emulation methods of discrete channel parameters are also analyzed and given.Measured results have shown that the output power delay profiles(PDP)and Doppler power spectrum densities(DPSD)can reproduce the non-stationary properties of V2V channels under time-variant scenarios,and also are consistent with the simulated ones.Thus,the proposed emulator can be applied on the system design validation,algorithm optimization,and performance evaluation of V2V communication devices.
作者
黄文清
李伟东
郭放
朱秋明
陈小敏
马田源
Huang Wenqing;Li Weidong;Guo Fang;Zhu Qiuming;Chen Xiaomin;Ma Tianyuan(Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing211100,China;National Instruments,Shanghai200120,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2019年第8期55-62,共8页
Journal of Electronic Measurement and Instrumentation
基金
国家重大科学仪器设备开发专项(2013YQ200607)
教育部产学合作协同育人项目(201702008035)
南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20180408)资助项目
关键词
车对车
多输入多输出
信道建模
几何随机模型
硬件模拟
vehicle-to-vehicle(V2V)
multiple-input multiple-output(MIMO)
channel modeling
geometry-based stochastic model(GBSM)
hardware emulation
