多用户MIMO中基于SLNR预编码的动态功率分配  

Dynamic power allocation based on SLNR precoding for multi-user MIMO downlink

作　　者：王晶晶[1] 谢显中[1] 张倩[1] 

机构地区：[1]重庆邮电大学个人通信研究所/计算机网络与通信信产部重点实验室,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2008年第6期643-645,667,共4页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金(60572089);重庆市自然科学基金;重庆市教委应用基础研究基金

摘　　要：在多用户MIMO系统中,基于信漏噪比(SLNR)的预编码由于同时消除了共信道干扰(CCI)和噪声而提高了系统性能。由于各用户的信道衰落不相同,信道质量的好坏直接影响了系统的性能。使用了一种动态功率分配算法,在SLNR预编码的基础上乘以功率分配系数,进一步改善系统性能。仿真结果说明了基于SLNR的预编码优于迫零(ZF)预编码,且采用动态功率分配后系统性能得到了进一步改善。The precoding based on signal-to-leakage and noise ratio （SLNR） improves the system performance because it eliminates the co-channel interference （CCI） and the noise in multi-user MIMO system simultaneously. Because the channel state of every user is different, the channel quality directly affects the performance of the system. Hence, a dynamic power allocation which can get a better performance was used. It multiplies a coefficient of power allocation after the precoding. Simulation results prove that the performance based on SLNR is better than the zero-forcing （ZF） solution, and it is further improved after using the dynamic power allocation.

关 键 词：多用户MIMO SLNR 预编码 功率分配 

分 类 号：TN929[电子电信—通信与信息系统]