二维相关K分布湍流信道的建模与仿真  

Modeling and Simulation of Bi-Dimensional Correlated K-Distributed Turbulent Channel

作　　者：柯熙政[1] 田晓超[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《光学学报》2015年第4期33-41,共9页Acta Optica Sinica

基　　金：国家自然科学基金(61377080;60977054);陕西省"13115"科技统筹计划(2011KTCQ01-31);陕西省教育厅产业化培育基金(2010JC17);西安市科技成果转换基金(CX12165);陕西省自然科学基础研究计划资助项目(2013JQ8011);陕西省教育厅科研计划项目(2013JK1104);江苏省省级前瞻性研究专项资金(第三批)项目(BE2013088)

摘　　要：针对强湍流的空间相关性特点,拟合了基于1-范数的相关函数,利用修正的球不变随机过程(SIRP)法得到相关K分布随机场,建立了二维相关K分布湍流信道仿真模型;解决了球不变随机过程法固有的特征随机变量各态历经问题;计算了二维相关K分布信道模型的误时隙率和信道容量,并与一维K分布信道模型做比较。结果表明这种模拟湍流信道的方法可以很好地控制K分布湍流分量的分布形式和统计特性,为信道估计的研究奠定了基础。The model of bi-dimensional correlated K-distributed Random turbulent is attained by the modified spherically invariant random process（SIRP） method. Then the bi-dimensional correlated K-distributed Random fields are obtained on the base of the assumption of spatial correlation on the one- norm. The various state experience problems of SIRP method are resolved, which is the inherent characteristic of SIRP method. The slot error rate and channel capacity of bi-dimensional correlated K-distributed channel model are caculated, compared with K-distributed channel model. The results indicate that the method of simulation of turbulent channel can be well controlled by the K-distribution of turbulent component distribution and statistical characteristics, and the validity of this modeling lays the foundation for the research of channel estimation.

关 键 词：光通信 大气湍流 K分布 球不变随机过程 误时隙率 

分 类 号：TN929.12[电子电信—通信与信息系统]