| 摘要: |
| 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。 |
| 关键词: MU-MIMO 波束成形 迫零 码本设计标准 |
| DOI： |
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| 基金项目: |
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| Labeling-based Zero-forcing Beamforming for LTE MU-MIMO |
| ZHAO Song-yi,ZHANG Bi-jun |
| () |
| Abstract: |
| 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 information 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 design criteria on codebook and quick algorithm for generation on precoding matrix are proposed. |
| Key words: MU-MIMO beamforming zero-forcing codebook design criteria |
