基于干扰对齐的协作预编码优化设计  

COOPERATIVE PRECODER OPTIMISED DESIGN BASED ON INTERFERENCE ALIGNMENT

作　　者：何华明[1,2] 唐亮[1] 俞凯[1] 卜智勇[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所宽带无线技术实验室,上海200050 [2]中国科学院研究生院,北京100039

出　　处：《计算机应用与软件》2014年第9期106-109,共4页Computer Applications and Software

基　　金：国家科技支撑计划项目(2011BAG05B03);国家科技重大专项(2011ZX03001-007-03;2011ZX03004-003;2010ZX03003-004)

摘　　要：在K多用户多输入多输出(MIMO)干扰信道下,通过协作共享信道状态信息,使用干扰对齐可以在高信噪比情况下能实现K/2自由度传输。然而在一定的自由度下,能获得的传输吞吐量还与所采用的预编码有重要的关系。在传统的基于特征向量的干扰对齐方法基础上,通过构造特征向量的优化空间,提出以最大化和速率为准则进行预编码的优化设计,给出两种优化算法,并通过进一步修改使其可以用于非理想信道状态信息下的预编码设计。仿真结果表明,在两种信道信息条件下所提出的优化算法比现有的一些基于特征向量的方法和速率得到提升。By sharing the channel state information in cooperation,it is proved that in K-user MIMO interference channel the transmissionwith K/2 degrees of freedom can be implemented in high signal-to-noise ratio situation by using interference alignment （IA）.However,undercertain degrees of freedom the transmission throughput obtained is much related to the preceding methods employed.In this paper,on thebasis of conventional eigenvector-based IA method,we propose to optimise the precoder design with the guideline of the maximisation and therate together with two precoder optimisation methods by constructing the optimisation space of eigenvectors,and through further modificationthey can be applied to the precoding design in non-ideal channel state information case.Simulation results show that the optimisation methodsproposed under the condition of two channel information cases achieve the improvement in sum rate compared with those eigenvector-basedmethods.

关 键 词：干扰信道 协作预编码 干扰对齐 线性生成空间 和速率 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]