CAJ | 학술논문

提出了一种聪明的TD-LTE MIMO操作模式,它结合了波束成形技术和闭环反馈MIMO的优点。当eNB获得UE上行SRS参考信号的信道信息,L1进行基于码本的信道估计量化和标签化。L1将标签上传到L2,L2基于标签进行多用户调度,这样较好地解决了基于迫零的UE配对和L1/L2间跨层资源分配这两个问题。 L1无需更多计算便可生成波束成形的预编码矩阵。同时,提出了在可接受的次优性能下一种易实现的一般性框架。为了达到目标,给出了新的码本设计标准和快速预编码矩阵的生成算法。
제출료일충총명적TD-LTE MIMO조작모식,타결합료파속성형기술화폐배반궤MIMO적우점。당eNB획득UE상행SRS삼고신호적신도신식,L1진행기우마본적신도고계양화화표첨화。L1장표첨상전도L2,L2기우표첨진행다용호조도,저양교호지해결료기우박령적UE배대화L1/L2간과층자원분배저량개문제。 L1무수경다계산편가생성파속성형적예편마구진。동시,제출료재가접수적차우성능하일충역실현적일반성광가。위료체도목표,급출료신적마본설계표준화쾌속예편마구진적생성산법。
A smart MU-MIMO operation method in TD-LTE system is proposed,which combines the merits of both BF( Beamforming) and CL-MIMO( Closed Loop MIMO) . Once obtaining the estimated channel in-formation when receiving UL-SRS(Uplink Sounding Reference Signal) from UE,the eNB will quantify them as labels using pre-determined codebook in physical layer L1 . Then L1 conveys those chosen labels to L2 in which scheduler will use those labels for MU scheduling. It will well solve the two problems of zero-forcing UEs pairing and the cross-layer resource allocation procedure between L1 and L2. And finally,L1 will generate the BF precoding matrix without heavy computation. This paper proposes a general framework for the system implementation with anticipated sub-optimal performance. To reach the objectives,new de-sign criteria on codebook and quick algorithm for generation on precoding matrix are proposed.