摘要
针对毫米波和传统蜂窝频段场景下频谱效率和传输可靠性较低的问题,文章提出了一种三维散射簇多天线信道模型以分析大规模多输入多输出(MIMO)系统性能。文章假设仰角和方位角分别遵循拉普拉斯和Von-Mises分布,推导出均匀平面阵列天线各单元之间空间相关系数的解析表达式,最后建立MIMO多天线系统模型并分析其系统性能。研究了仰角功率谱中不同角度扩展对均匀平面阵列衰落相关性和信道容量的影响,以及不同信噪比和天线阵元数对频谱效率的影响。分析结果与传统的均匀线性阵列进行比较表明,在毫米波场景下,均匀平面阵列比均匀线性阵列更适用于大规模MIMO系统,这使未来的移动网络工作在不同频段和蜂窝小区成为可能。
In order to improve the spectral efficiency of the system and increase the transmission reliability,it is necessary to establish a spatial fading channel model to analyze the performance of massive Multiple-Input and Multiple-Output(MIMO)systems.Assuming that the elevation and azimuth angles follow the Laplacian distribution and the Von-Mises distribution,the analytical expressions of the spatial correlation coefficients between the elements of the uniform planar array antenna are derived.The MIMO multi-antenna system model is established to analyze the system performance.The effects of different angle spread in elevation power spectrum on the fading correlation and channel capacity of uniform planar arrays,and the effects of different signal-to-noise ratios and antenna array elements on spectral efficiency are studied.Compared with the traditional uniform linear array,the analysis results show that the uniform planar array is more suitable for the massive MIMO system than the uniform linear array in the millimeter wave scene,which makes it possible for the future mobile network to work in different frequency bands and cells.
作者
周杰
李豪杰
刘杨
ZHOU Jie;LI Hao-jie;LIU Yang;Nanjing University(Laboratory of Meteorological Observation and Information Processing of Information Science and Technology,Nanjing 210044,China;Deparment of Electronic and Electrical Engineering,Niigata University,Niigata 950-2181,Japan)
出处
《光通信研究》
北大核心
2020年第6期54-58,共5页
Study on Optical Communications
基金
国家自然科学基金资助项目(61372128,61471153)
江苏省高校自然科学基金资助项目(14KJA510001)
江苏省信息与通信工程优势学科建设资助项目。
