| 引用本文: | 宋吉婷,王威,孙郁哲,姜苏英,张旭.矩形隧道下存在车辆遮挡的V2V信道测量与分析[J].哈尔滨工业大学学报,2022,54(5):117.DOI:10.11918/202104071 |
| SONG Jiting,WANG Wei,SUN Yuzhe,JIANG Suying,ZHANG Xu.Measurement and analysis of V2V channel with vehicle obstruction in rectangular tunnels[J].Journal of Harbin Institute of Technology,2022,54(5):117.DOI:10.11918/202104071 |
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| 摘要: |
| 车对车(V2V)通信是智能交通系统的重要组成部分。隧道是智能交通系统的一个重要应用场景。考虑到隧道壁反射、车辆衍射以及隧道附属设施布置密而复杂的问题,研究隧道场景下的V2V信道传播特性对于智能交通系统的设计与测试具有重要意义。本文利用宽带信道探测器对隧道环境下的V2V信道进行了测量。测量所使用的载波频率和带宽分别为5.2 GHz和120 MHz。根据不同的情况,将测量分为3种类型:可视距（LOS）、部分视距（OLOS）和不可视距（NLOS）。基于实际测量数据,建立不同场景的路径损耗模型和接收信号幅值衰落分布,进而分析信道衰落特性。结果表明,NLOS场景下的路径损耗指数、阴影衰落均大于LOS、OLOS情况,LOS、OLOS之间阴影衰落没有显著变化。LOS和OLOS场景下接收信号的幅度衰落均服从莱斯分布,NLOS场景下接收信号的幅度衰落服从瑞利分布；3种场景下均方根延迟扩展都符合对数正态分布； NLOS引起了更大的阴影衰落和时域弥散；随着距离的增大,K因子逐渐减小,表明K因子对距离具有依赖性。 |
| 关键词: V2V 无线信道 隧道 车辆遮挡 大尺度分析 小尺度分析 |
| DOI：10.11918/202104071 |
| 分类号:TN929.5 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(61871059) |
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| Measurement and analysis of V2V channel with vehicle obstruction in rectangular tunnels |
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SONG Jiting,WANG Wei,SUN Yuzhe,JIANG Suying,ZHANG Xu
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(School of Information Engineering, Chang’an University, Xi’an 710061, China)
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| Abstract: |
| Vehicle-to-vehicle (V2V) communication is an important component of the intelligent transportation system (ITS), and tunnel is an essential application scenario of ITS. Considering the reflection of microwaves by tunnel walls, the diffraction by vehicles, and the dense and complex layout of the tunnel ancillary facilities, it is of great significance to investigate the propagation characteristics of V2V channel in tunnel scenarios. In this study, the V2V channel was measured by means of a broadband channel sounder in the tunnel environment. The carrier frequency and bandwidth were 5.2 GHz and 120 MHz respectively. Regarding to different situations, the measurement was divided into three types: line-of-sight (LOS), obstructed line-of-sight (OLOS), and non-line-of-sight (NLOS). Based on the measured data, the path loss models and received signal amplitude fading distributions were established for different scenarios, so as to analyze the channel fading characteristics. Results show that the path loss index and shadow fading in NLOS were larger than those in LOS and OLOS. There were no significant changes in shadow fading between LOS and OLOS. The amplitude fading of the received signal in both LOS and OLOS scenarios followed the Rice distribution, and that in the NLOS scenario followed the Rayleigh distribution. The root-mean-squared delay spread conformed to the log-normal distribution in all the three scenarios. The shadow fading and time-domain dispersion were larger in NLOS. The K factor decreased with increasing distance, indicating that the K factor is dependent on the distance. |
| Key words: V2V wireless channel tunnel vehicle obstruction large-scale analysis small-scale analysis |
