基于功率控制CDMA容量优化的应用  

Application Research on CDMA Capacity Optimization Based on Power Control

作　　者：施永贵[1,2] 王洪峰[1] 唐加福[1] 马辉[2] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004 [2]中国电信石嘴山分公司,宁夏石嘴山753000

出　　处：《控制工程》2012年第3期451-454,共4页Control Engineering of China

基　　金：国家自然科学基金项目资助(70721001;71001018);中央高校基本科研业务费专项资金资助(N090404020;N110404019);中国博士后科学基金面上资助项目(20100481202);教育部博士点新教师基金资助(200801451053)

摘　　要：为了克服CDMA系统的远近效应和边缘效应,解决CDMA网络容量受限的问题,采用了功率控制技术,对前向链路减小基站发射功率,对反向链路调整移动台发射功率,降低系统内的干扰水平,满足用户QoS要求,有效提高CDMA系统容量。理论阐述了功率控制技术与CDMA系统容量的关系,从系统载扰比分析入手验证了功率控制对CDMA系统容量的影响,得到了基于功率控制技术两种容量优化方法即远近控制和C/I控制。实际案例仿真结果表明,通过优化功率控制参数的方法能够有效地提升CDMA系统的容量,促使CDMA网络软容量达到最佳,为CDMA网络优化人员提供可以借鉴的思路和方法。To overcome the distance effect and edge effect of CDMA systems, and solve the restriction problem of CDMA network ca- pacity, the power control techniques is used to reduce the forward link base station transmit power, mobile station on the reverse link transmit power adjustment, and reduce the interference level to meet users＇ QoS requirements. Then the CDMA system capacity is im- proved. The relationship between the power control and CDMA system capacity is discussed, the influence of power control on CDMA system capacity is verified through the ratio analysis of system carrier to interference and got two kinds of capacity optimization method based on power control technology, that is distance control and C / I control. Simulation results show that optimizing the parameters of power controller can effectively improve the CDMA system capacity, promote the best of CDMA network＇ s soft capacity and provide some ideas and methods for CDMA network optimization workers.

关 键 词：CDMA网络 功率控制 容量优化 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]