使用码本的MIMO系统多用户调度

为了解决多输入多输出(MIMO)系统广播信道多用户调度的问题,提出了一种新的基于FFT码本的低复杂度用户选择算法.通过将用户归入不同的信道量化区域进行快速筛选,将待选的用户数降至码本的码字个数,再利用信道量化区域之间的准正交性最终确定一组准正交用户.仿真结果表明,通过选取合适的码本,这一调度算法传输速率优于已有算法,同时在用户数较大的情况下显著减小了算法复杂度,从而提高了系统传输性能,验证了该方法的有效性.

A Novel Codebook Based Multiuser Scheduling in MIMO System

This paper deals with the problem of multiuser scheduling schemes in MIMO broadcast channels. A new algorithm which is based on FFT codebooks is presented for determining which users should be active. In this algorithm, the users are divided into different groups which are belong to different quantized channel region, and then the active user group is selected by semi-orthogonal property among the channel regions. Simulation results show that the presented algorithm can get higher sum rates than that of SUS. Further more, the presented algorithm can greatly reduced the computing complexity when the user number is large at the same time. In conclusion, the new user selection algorithm is beneficial in terms of increasing system throughput as well as decreasing complexity of multiuser scheduling.