高频段分布式无线通信系统中的扇区选择及下行功率控制研究  

Research on Sector Selection and Power Control for Downlink in Distributed Wireless Communication System over High Frequency Band

作　　者：徐湛[1] 周世东[2] 陈翔[3] 苏中[1] 

机构地区：[1]北京信息科技大学信息与通信工程学院,北京100085 [2]清华大学电子系,北京100084 [3]清华大学宇航中心,北京100084

出　　处：《科学技术与工程》2013年第16期4547-4551,4561,共6页Science Technology and Engineering

基　　金：国家自然科学基金(61031001;51275052);国家自然科学基金国际合作交流项目(61261160497);北京市引进国外技术重点项目(B201101010)资助

摘　　要：针对高频段(6 GHz—15 GHz)移动通信信道环境中视距为主、阴影衰落严重的传播特点,研究提出了在高频段分布式无线通信系统中的扇区选择和功率控制方法。针对高频段典型热点场景——天井覆盖模型,设计了基于光载无线通信(RoF)的分布式天线覆盖方案。并针对系统中存在的RoF的非线性影响以及天线间的自干扰问题,设计一种有效且低复杂度的下行功率控制方法。仿真实验表明,该算法可以将分布于不同地理位置的发送天线的接收信噪比调平衡,从而降低了干扰影响,并且算法具有较好的收敛性。According to the characteristics of line of sight and severe shadow fading on mobile communication channel in high frequency band, sector selection and power control method are presented in distributed wireless communication system in the high frequency band. In the typical patio scene, wireless coverage scheme of distribu- ted antennas based on Radio over Fiber（RoF） is designed. Aiming at the problem of nonlinear effects in RoF sys- tem and the self-interference between the distributed antennas, an effective and low-complexity downlink power control method is presented. Simulation results show that the algorithm can make the SINRs of the antennas location in distributed areas balance, which leads to the lower interference. In addition, the algorithm has good conver- gence.

关 键 词：高频段 分布式无线通信系统 扇区选择 功率控制 

分 类 号：TN914.5[电子电信—通信与信息系统]