孔凌劲, 刘月玲, 张校晨, 张晓瀛, 赵海涛, 魏急波. 超短波频段复杂城区场景的信道测量与建模[J]. 电波科学学报, 2020, 35(4): 542-550. doi: 10.13443/j.cjors.2020041101
      引用本文: 孔凌劲, 刘月玲, 张校晨, 张晓瀛, 赵海涛, 魏急波. 超短波频段复杂城区场景的信道测量与建模[J]. 电波科学学报, 2020, 35(4): 542-550. doi: 10.13443/j.cjors.2020041101
      KONG Lingjin, LIU Yueling, ZHANG Xiaochen, ZHANG Xiaoying, ZHAO Haitao, WEI Jibo. Channel measurement and modeling for VHF bands in typical urban scenarios[J]. CHINESE JOURNAL OF RADIO SCIENCE, 2020, 35(4): 542-550. doi: 10.13443/j.cjors.2020041101
      Citation: KONG Lingjin, LIU Yueling, ZHANG Xiaochen, ZHANG Xiaoying, ZHAO Haitao, WEI Jibo. Channel measurement and modeling for VHF bands in typical urban scenarios[J]. CHINESE JOURNAL OF RADIO SCIENCE, 2020, 35(4): 542-550. doi: 10.13443/j.cjors.2020041101

      超短波频段复杂城区场景的信道测量与建模

      Channel measurement and modeling for VHF bands in typical urban scenarios

      • 摘要: 为了准确反映复杂城区环境下移动自组织网络(mobile ad hoc network,MANET)通信节点间的无线信道传播特性,以150 MHz频点为例对山东省青岛市典型城区场景的超短波无线信道进行了外场测量.基于测量数据开展统计分析,提取了路径损耗指数、阴影衰落标准差、多径时延拓展以及频率相关性等信道参数,并针对准视距(quasi-light-of-sight,QLOS)区和非视距(non-light-of-sight,NLOS)区建立了大尺度衰落模型和小尺度抽头延迟线模型.分析和建模结果表明:在MANET城市通信场景下,路径损耗指数随距离增加呈现出双斜率特性;当累积分布函数(cumulative distribution function,CDF)为0.9时,均方根时延在QLOS区为726 ns,在阻挡严重的NLOS区为967 ns;相关带宽在QLOS区和NLOS区分别为700 kHz和300 kHz.论文所建信道模型有利于准确衡量MANET通信设备在复杂城区的通信性能,并为相关通信系统设计提供参考.

         

        Abstract: In order to empirically characterize the wireless channel propagation for the mobile ad hoc network (MANET) communications in urban environment, extensive wideband channel measurements are performed at 150 MHz on behalf of the very high frequency (VHF) band in Qingdao urban areas. Based on the measurement data and statistical analysis, the path loss exponent, shadow fading standard variations, multipath delay spreads, and frequency correlations are extracted. Two statistical tapped delay line channel models are established for quasi-line-of-sight and non-line-of-sight regions. Numerical analysis shows that in the MANET urban communication scenario, the path loss exponent exhibits a double slope characteristic as the distance increases; the root-mean-square(RMS) delay is 726 ns in the quasi-line-of-sight region and 967 ns in the severely blocked non-line-of-sight region when the cumulative distribution function equals to 0.9; the relevant bandwidths are 700 kHz and 300 kHz in the quasi-line-of-sight and non-line-of-sight regions, respectively. The channel models obtained in this paper can be applied to measure the performance of MANET communication systems in urban areas, and give useful insights for the system design.

         

      /

      返回文章
      返回