一种TDD模式下大规模MIMO的I/Q不平衡引起的信道非互易性补偿方法  

Compensation for channel non-reciprocity caused by I/Q imbalance in TDD-Massive MIMO systems

作　　者：郭耀廷 王炳和[1] 蔡华杰 曲毅[1] 

机构地区：[1]武警工程大学,西安710000

出　　处：《激光杂志》2016年第12期99-102,共4页Laser Journal

摘　　要：大规模MIMO系统的基站对信道状态信息获取程度决定了其下行信道预编码性能,从而影响了整个下行信道速率。本文研究I/Q不平衡对TDD模式下的大规模MIMO上下行信道互易性的影响,证明了当无法实现理想的I/Q不平衡校准,随着基站天线数的增加,若基站采用多晶振变频器,基站端的I/Q不平衡出现随机特性将会对链路I/Q不平衡进行补偿,使系统容量损失得以补偿。仿真结果验证了结论的可靠性。In Massive MIM0 system, the base station based on channel state information to precoding performance, which affect the downlink rate. This paper study the bad effect of channel non-reciprocity on system capacity caused by I/Q imbalance, we prove if we can＇ t calibrate the I/Q imbalance perfectly, as the growing number of base station antennas, if base station use frequency converter with separate local oscillators, the I/Q imbalance in base station will appear stochastic behavior which can compensate I/Q imbalance and hence eliminate the system capacity loss. The simulation result shows the reliability of the conclusion.

关 键 词：TDD 大规模MIMO I/Q不平衡 系统容量 

分 类 号：TN209[电子电信—物理电子学]