三维传播环境天线阵列空域相关性研究

发布时间：2019-04-08 15:24

【摘要】：针对任意三维传播环境下多天线空域相关性求解复杂的问题,提出一种基于角度域脉冲采样的高效近似计算方法。针对均匀角度谱分布,详细推导出了天线空域相关系数的闭合表达式和近似表达式;针对非均匀任意角度谱,利用有限个均匀二维采样脉冲加权叠加进行逼近,从而将天线空域相关系数等效为多个均匀采样脉冲对应相关系数的加权之和。基于实测的Von Mises Fisher角度谱,仿真结果表明,当采样间隔小于2°时,所提方法运算量仅为数值积分方法的十分之一,而绝对误差小于0.005,可以应用于多天线分集、多输入多输出系统性能评估及天线阵列流型优化等场合。
[Abstract]:In order to solve the complex problem of multi-antenna spatial correlation in arbitrary three-dimensional propagation environment, an efficient approximate calculation method based on angle-domain pulse sampling is proposed. For the uniform angle spectrum distribution, the closed and approximate expressions of the spatial correlation coefficient of the antenna are derived in detail. For the non-uniform arbitrary angle spectrum, the weighted superposition of finite uniform two-dimensional sampling pulses is used to approximate the spatial correlation coefficient of the antenna, which is equivalent to the weighted sum of the corresponding correlation coefficients of multiple uniform sampling pulses. Based on the measured Von Mises Fisher angle spectrum, the simulation results show that when the sampling interval is less than 2 掳, the calculation amount of the proposed method is only 1/10 of that of the numerical integration method, and the absolute error is less than 0.005. The proposed method can be applied to multi-antenna diversity. Performance evaluation of multi-input multi-output system and optimization of antenna array flow pattern.
【作者单位】：南京航空航天大学江苏省物联网与控制技术重点实验室;英国赫瑞瓦特大学工程与物理科学学院;
【基金】：国家自然科学基金(61571225) 江苏省博士后基金(1601017C) 中央高校基本科研业务费青年科技创新基金(NS2015046,NS2016044) 江苏省物联网与控制技术重点实验室基金(NJ20160027)资助课题
【分类号】：TN820.15;TN919.3

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