WiMAX上行功率控制中分集合并研究  

Research on Diversity Combining for WiMAX Uplink Power Control

作　　者：黎海涛[1] 吕海坤[1] 袁海英[1] 周艳慧[2] 

机构地区：[1]北京工业大学电子信息与控制工程学院,北京朝阳区100124 [2]国家广播电影电视总局,北京西城区100866

出　　处：《电子科技大学学报》2014年第3期369-374,共6页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金(61001049);北京市自然科学基金(4112012)

摘　　要：WiMAX上行链路采用功率控制提高系统容量和链路质量,在基于信号干扰噪声比(SINR)平衡准则的功率控制中,同道干扰和基站端天线合并算法对用于功率控制的SINR有重要影响。首先构建了WiMAX同道干扰模型,根据该模型推导出功率控制中SINR的中断概率;然后,针对基站端天线合并算法对SINR中断概率的影响,提出硬/软限幅合并算法。仿真结果表明,提出的合并算法能够有效抑制同道干扰,降低功率控制中SINR的中断概率,改善WiMAX上行功率控制性能。Power control is efficiently utilized to improve WiMAX system capacity. For the signal interference and noise ratio （SINR） balance criterion based power control technique, the co-channel interference and the diversity combination of base station antenna have important effect on the SINR. In this paper, co-channel interference （CCI） model for WiMAX networks is presented, the outage probability of SINR with respect to power control is derived based on the CCI model and finally, hard/soft limiting combining algorithms are proposed to reduce interference. Simulation results show that the proposed combining algorithms can suppress the co-channel interference and reduce the outage probability of SINR, so that the power control performance of WiMAX uplink can be improved.

关 键 词：同道干扰 分集合并 功率控制 信号干扰噪声比 WIMAX 

分 类 号：TP92[自动化与计算机技术]