通信学报 ›› 2017, Vol. 38 ›› Issue (10): 135-145.doi: 10.11959/j.issn.1000-436x.2017205

• 学术论文 • 上一篇    下一篇

2.55 GHz城市微蜂窝三维宽带时变信道特性分析与建模研究

李树1,赵雄文1,2,3,张蕊2,王琦1,耿绥燕1   

  1. 1 华北电力大学电气与电子工程学院,北京 102206
    2 中国电波传播研究所电波环境特性与模化技术国家重点实验室,山东 青岛 266107
    3 东南大学移动通信国家重点实验室,江苏 南京 210096
  • 修回日期:2017-06-27 出版日期:2017-10-01 发布日期:2017-11-16
  • 作者简介:李树(1991-),男,湖南娄底人,华北电力大学博士生,主要研究方向为3D-MIMO信道建模、毫米波信道建模、高分辨率提取算法、时变信道建模以及D2D通信。|赵雄文(1964-),男,陕西清涧人,华北电力大学教授、博士生导师,主要研究方向为MIMO无线信道建模和实验、无线通信系统、电磁场理论及其应用、频谱管理和干扰协调技术等。|张蕊(1979-),女,河北正定人,博士,中国电波传播研究所高级工程师,主要研究方向为对流层电波传播、无线信道测量与建模等。|王琦(1990-),女,新疆呼图壁人,华北电力大学博士生,主要研究方向为毫米波无线通信、大规模MIMO信道建模等。|耿绥燕(1966-),女,陕西缕德人,华北电力大学副教授,主要研究方向为短距离通信技术与应用、毫米波MIMO无线通信信道实验与建模等。
  • 基金资助:
    电波环境特性与模化国家重点实验室开放课题基金资助项目(201400009);移动通信国家重点实验室开放课题基金资助项目(2016D09);国家自然科学基金资助项目(61372051)

Research on characterization and modeling for 3D wideband time-varying channels for urban microcells at 2.55 GHz

Shu LI1,Xiong-wen ZHAO1,2,3,Rui ZHANG2,Qi WANG1,Sui-yan GENG1   

  1. 1 School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China
    2 National Key Laboratory of Electromagnetic Environment,China Research Institute of Radio Wave Propagation ,Qingdao 266107,China
    3 National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China
  • Revised:2017-06-27 Online:2017-10-01 Published:2017-11-16
  • Supported by:
    Open Fund of National Key Laboratory of Electromagnetic Environment(201400009);Open Fund of Na-tional Mobile Communications Research Laboratory(2016D09);The National Natural Science Foundation of China(61372051)

摘要:

基于2.55 GHz城市微蜂窝场景多输入多输出(MIMO,multiple-input multiple-output)信道实测数据,研究了三维宽带无线信道的时变特性,利用SAGE (space-alternating generalized expectation-maximization)算法提取多径参数,包括水平、垂直面的电波离开角和电波到达角,采用双向匹配算法识别并跟踪多径,建立了多径的“生灭”模型,统计分析了多径的出现率、多径生命周期、多径初始参数和演进参数等时变信道模型参数并根据上述参数的统计分布和相关性展开建模,建立了基于多径“生灭”过程的时变信道模型,并给出了详细的模型参数和仿真实现步骤,通过对比实测数据和仿真结果的均方根时延扩展和均方根角度扩展,验证了模型的可用性。提出的时变信道模型可用于城市微蜂窝场景时变信道仿真,也为5G动态信道建模的研究提供重要参考。

关键词: 城市微蜂窝, SAGE, 多径“生灭”模型, 时变信道, 信道仿真与验证, 5G动态信道建模

Abstract:

Based on the outdoor microcell MIMO channel measurement campaign at 2.55 GHz,the time-evolution characteristics of three-dimensional wideband channel were studied.The SAGE algorithm was used to extract multipath parameters such as azimuth and elevation angle of departure and arrival.A bidirectional matching algorithm was applied to tracing multipath and the "birth-death" process.The statistical characteristics of multipath birth,lifespan,multipath initial and evolution parameters were analyzed and modeled based on the cross-correlations of multipath parameters.A time-varying channel model with multipath birth-death process was developed.The model parameter table and a detailed flowchart were offered for time-varying channel simulations.The proposed model was validated by comparing the root-mean-square (RMS) of delay spread and angular spread between the simulated and measured results.The channel model proposed can be applied in time-varying channel simulation for urban microcells and it’s also very important to be referred in 5G dynamic channel modeling.

Key words: urban microcell, SAGE, multipath birth-death process, time-varying channel, channel simulation and valida-tion, 5G dynamic channel modeling

中图分类号: 

  • TN928