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.
出处
《激光杂志》
北大核心
2016年第12期99-102,共4页
Laser Journal
