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

发布时间：2018-09-07 11:30

【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。
[Abstract]:Based on the measured data of 2.55 GHz urban microcellular scene with multiple input multiple output (MIMO,multiple-input multiple-output) channel, the time-varying characteristics of 3D wideband wireless channel are studied, and the multipath parameters, including the level, are extracted by SAGE (space-alternating generalized expectation-maximization) algorithm. The radio wave departure angle and arrival angle of the vertical plane are identified and tracked by bidirectional matching algorithm. The "birth and death" model of the multipath is established, and the occurrence rate and multipath life cycle of the multipath are statistically analyzed. The time-varying channel model parameters, such as multipath initial parameters and evolution parameters, are modeled according to the statistical distribution and correlation of the above parameters, and a time-varying channel model based on the multipath "birth and death" process is established. Detailed model parameters and simulation implementation steps are given. The availability of the model is verified by comparing the RMS delay spread and RMS angle spread between the measured data and the simulation results. The proposed time-varying channel model can be used in the simulation of time-varying channel in urban microcellular scene, and it also provides an important reference for the study of 5G dynamic channel modeling.
【作者单位】：华北电力大学电气与电子工程学院;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;东南大学移动通信国家重点实验室;
【基金】：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(No.201400009) 移动通信国家重点实验室开放课题基金资助项目(No.2016D09) 国家自然科学基金资助项目(No.61372051)~~
【分类号】：TN929.5

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