一种低复杂度多用户MIMO预编码方法  

A Low Complexity Precoding Method for Multiuser MIMO

作　　者：肖爱民[1] 李辉[1] 戴旭初[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,安徽合肥230027

出　　处：《通信技术》2012年第5期8-11,共4页Communications Technology

基　　金：国家科技重大专项资助课题(No.2011ZX03003-001-03)

摘　　要：针对多用户多输入多输出(MIMO,Multiple Input Multiple Output)系统下行链路,提出了一种基于特定矩阵结构的低复杂度线性预编码方法。该方法利用规则块对角化(RBD,Regularized Block Diagonalization)方法的预编码矩阵具有的内在结构设计预编码矩阵,通过最小化总的干扰与噪声功率之和得到预编码矩阵的最终形式。等效性证明和复杂度分析表明,该方法能够获得与规则块对角化方法相同的"和速率"性能,同时大幅度降低了运算复杂度。仿真实验结果验证了这一结论。A low complexity linear precoding method based on specific matrix structure is proposed for downlink multiuser MIMO systems.The proposed method is designed by using the inherent structure of the precoding matrix of regularized block diagonalization（RBD）,and the precoding matrix is obtained by minimizing the total interference-plus-noise power.The equivalence proof and complexity analysis indicate that the proposed precoding method achieves the same sum rate as RBD while significantly reducing the computational complexity.Simulation results verify the conclusion.

关 键 词：多天线 多用户 预编码 和速率 

分 类 号：TN919.3[电子电信—通信与信息系统]