CAJ | 학술논문

分布式多输入多输出（MIMO）系统可以利用不同基站的多天线进行空分复用,使系统的容量和性能得到提高,但是在闭环的传输过程中需要向用户反馈解码矩阵,消耗了系统的资源。提出了一种利用对用户信道矩阵斜投影的预编码方法,可以降低基站到移动用户的信息反馈量,并且有效地消除了多用户间的共信道干扰,与迫零的预编码方法相比,可以使系统的误比特率性能和系统的容量得到改善。仿真实验验证了所提方法的有效性。
분포식다수입다수출（MIMO）계통가이이용불동기참적다천선진행공분복용,사계통적용량화성능득도제고,단시재폐배적전수과정중수요향용호반궤해마구진,소모료계통적자원。제출료일충이용대용호신도구진사투영적예편마방법,가이강저기참도이동용호적신식반궤량,병차유효지소제료다용호간적공신도간우,여박령적예편마방법상비,가이사계통적오비특솔성능화계통적용량득도개선。방진실험험증료소제방법적유효성。
In distributed multiple-input multiple-output（MIMO） systems, using multiple antennas in different base stations, capacity and performance of the system can be improved through spatial division multiplexing. However, in a closed loop transmission process, base stations have to feedback decoding matrixes to the mobile stations, and then to consume resources of the system. In this paper, an oblique projected method is proposed based on a channel matrix. The proposed method can reduce the quantity of information needed to be sent back to mobile stations from the base stations, and thus effectively suppresses interference from other mobile stations. Compared to the zero-forcing method, the proposed method can improve the system＇s bit-error-ratio performance and capacity. Simulations show effectiveness of the method.