一种双维度上的导频复用方法及其性能分析  

New mode of pilot reuse by two dimensions with its analysis on performance

作　　者：高翟 朱旭 吴让仲[1] GAO Di;ZHUXu;WU Rangzhong(School of Mechanical Engineering and Electronic Information,China University of Geosciences,Wuhan 430074,China;Department of Electrical Engineering and Electronics,University of Liverpool,Liverpool L693BX,United Kingdom)

机构地区：[1]中国地质大学机械与电子信息学院,湖北武汉430074 [2]利物浦大学电气与电子工程学院,英国利物浦L693BX

出　　处：《华中科技大学学报（自然科学版）》2020年第6期33-38,56,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家留学基金管理委员会资助项目(201506415036);湖北省自然科学基金资助项目(2017CFC870)。

摘　　要：针对蜂窝系统中导频稀缺和边缘用户性能不足的问题,提出了合理提升导频利用率的方法,该方法通过在不同的环区内设计各自的导频复用程度来实现.有别于传统的扇区划分,以基站与用户终端的距离为指标划分出若干环区,使小区中心用户与边缘用户有明晰的区隔.一方面利用高复用因子提高小区中心区域的导频利用率,另一方面利用低复用因子保证边缘用户的通信质量.环区划分所对应的导频微观复用是以小区为单位的宏观复用的补充,两种复用模式结合成双维度导频复用,使导频复用程度的调节更精细,易于实现用户容量与用户体验的平衡.仿真结果验证了上述优势,并显示出在导频资源受限的条件下,双维度导频复用在增大用户承载量的同时能降低来自邻近小区的导频污染.In the case of scarcity on pilot resource and low performance on edge users,a scheme to properly raise the efficiency of pilots was proposed,which was realized by setting distinct degrees of pilot reuse in different rings.Unlike traditional sectors,rings in cells here were based on the distance between base station and corresponding terminals,where users were carefully separated to central areas and edge areas.Greater reuse factors were used to increase the degree of pilot reuse,and on the other hand,smaller reuse factors were utilized to guarantee the transmission quality of edge users.The micro-dimension pilot reuse,extended from division by rings,plays a supplementary role of macro-dimension pilot reuse with the unit of a whole cell.The combination of those two dimensions refines the adjustment on the extent of pilot reuse,which offers more convenience in achieving the balance between system capacity and users;performance.Simulation here verifies the advantages above,and it also indicates the effect of two-dimension reuse on decreasing pilot contamination while the quantity of users grows under limited pilot resource.

关 键 词：导频复用 宏观维度 微观维度 复用因子 环区 用户容量 

分 类 号：TN92[电子电信—通信与信息系统]