干扰抵消型多用户检测器的改进方法  

Improved method of interference cancellation

作　　者：李林[1] 贾鹏[1] 鲜继清[1] 

机构地区：[1]重庆邮电大学自动化学院,重庆400065

出　　处：《重庆邮电学院学报（自然科学版）》2006年第6期699-703,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)

基　　金：国家"863"项目资助(2003AA412030)

摘　　要：提出了干扰抵消型多用户检测器的改进方法,即根据功率大小将用户分组,组内用户并行处理,组间串行处理。详细说明了检测器结构,分析了误码率,给出了计算表达式。仿真结果证明:无论在同步系统还是异步系统,这种结构在抗远近效应、系统容量等方面的性能都相似于或优于多级串行抵消器,而处理时间却比后者大大降低;同时比并行抵消器显示出极大的优势。An improved method of interference cancellation is proposed. In this model, users are divided into groups according to their power. The process in the same group is parallel and that in different groups is successive. The model structure is presented and the expression of bit error rate is derived analytically. The simulation proved that no matter in synchronous system or asynchronous system, the performance of this model is similar with or better than multi-stage successive interference cancellation in near-far resistance and system capacity, etc. But the process time is much shorter than the latter; at the same time, this model also outperform parallel interference cancellation.

关 键 词：码分多址 干扰抵消 多址干扰 远近效应 时延 

分 类 号：TN929.533[电子电信—通信与信息系统]