基于三维空间域模型的上行链路信道估计

摘要

为了研究信号在三维空间域信道模型中的统计特性,建立一种三维空间域统计信道模型,此模型适用于移动台(MS)周围散射体不存在情况下的通信环境. 先假设发射信号基站(BS)周围的散射体分布服从均匀分布,然后给出了上行链路到达角度( AOA)和到达时间( TOA)概率分布的分析算法. 同时,利用多普勒累积函数分布,推导出三维空间域下的多普勒频移( DS)概率分布. 理论分析和仿真结果表明,与已有的二维和三维模型对比,本模型的上行链路信道参数估计更加适用于各种移动通信环境,对空间统计信道模型的研究和应用提供了有效的支持与拓展.%In order to study the statistical properties of the signals in the three dimensional space domain channel model, a three dimensional spatial statistical channel model is presented, which is appropriate for the mobile envi-ronment with no scatterer around the mobile station ( MS) .Assuming that the scatterer distribution around the base station ( BS) is the uniform distribution, the analysis algorithm of the probability density function of the uplink an-gle of arrival ( AOA) and time of arrival ( TOA) is derived.In addition, using the Doppler cumulative distribution function, the probability distribution of Doppler shift ( DS) in the three dimensional space domain is derived.Simu-lation results show that, comparing with some 2D and 3D models, the uplink channel parameter estimation in the proposed model is more appropriate for various mobile communication environments, which provides effective sup-port and expansion for the research and application of spatial statistical channel model.