SRS资源受限场景中联合导频分配的多用户分组

为解决时分双工大规模多输入多输出（MIMO）系统中探测参考信号（SRS）资源受限造成的系统性能下降问题，基于用户信道变化速率的不同，提出确定用户探测周期的准则，设计扩充了可调度用户集合的导频分配方案，并提出了匹配的多用户分组调度方案.采用3-D MIMO信道对算法进行了验证，仿真结果表明，该算法可有效提升系统性能.

Joint Pilot Allocation and User Grouping Scheme with Limited SRS Resources

To solve the system performance degradation problem caused by the limited sounding reference signal (SRS) resources in time duplex division (TDD) massive multiple-input-multiple-output (MIMO) systems, based on the fact that the channel variant rates of various users are different, one metric that determines the sounding period is provided firstly, and then a pilot allocation scheme is given to expand the scheduling set, and finally a matched multiuser grouping scheme is introduced. Meanwhile, a 3-D MIMO channel model is used to verify the scheme. Simulations show that the system performance is effectively enhanced.