CAJ | 학술논문

为了解决下行三维(3D)多用户(Multi-User,MU)多输入多输出(MIMO)系统中的共信道干扰问题,提出了一种基于Khatri-Rao积的3 D预编码方法。该方法首先产生离线码本,然后各用户分别选择与水平维和垂直维信道最匹配的的码字并将其反馈给基站端,最后,根据提出的Khatri-Rao积基站端构造3 D预编码矩阵,对不同用户数据进行处理。理论分析和仿真结果表明,该方法可有效地匹配真实信道状态信息( CSI),而且可有效地抑制共信道干扰,提升系统误码性能,对系统的性能优化有一定的参考价值。
위료해결하행삼유(3D)다용호(Multi-User,MU)다수입다수출(MIMO)계통중적공신도간우문제,제출료일충기우Khatri-Rao적적3 D예편마방법。해방법수선산생리선마본,연후각용호분별선택여수평유화수직유신도최필배적적마자병장기반궤급기참단,최후,근거제출적Khatri-Rao적기참단구조3 D예편마구진,대불동용호수거진행처리。이론분석화방진결과표명,해방법가유효지필배진실신도상태신식( CSI),이차가유효지억제공신도간우,제승계통오마성능,대계통적성능우화유일정적삼고개치。
In order to solve the problem of co-channel interference ( CCI ) in downlink 3 D ( Three Dimen-sion) MU-MIMO( Multi-user Multiple Input Multiple Output) system,a precoding method based on Khatri-Rao product is proposed. Firstly,outline codebook is designed,and then the user selects the best horizon-tal dimension precoding codeword and vertical dimension precoding codeword respectively,and feeds back to the base station,finally base station constructs 3D precoding matrix according to the proposed Khatri-Rao product and processes different users' data. Both theoretical analysis and simulations indicate that the proposed method can not only match the authentic channel state information( CSI) but also effectively sup-press the co-channel interference and improve system bit error rate( BER) performance. The research in this paper has a certain reference value for the system optimization.