| 摘要: |
| 在无线通信系统中，基站可以根据信道互易性使用波束成形（Beam Forming）技术提
升系统性能。信道互易性的准确程度对性能是有影响的，因此需要对其分析以指导系统设计
。对长期演进（LTE）系统的互易性进行建模，指出了终端发送天线和接收天线数目的不对
称性，以及基站信道估计的误差对信道互易性的影响。通过数值仿真验证了不理想的信道互
易性使波束成形性能受到损失，并为系统改进提出思路。其结论容易推广到其他应用波束成
形的无线通信系统。 |
| 关键词: 无线通信 LTE系统 波束成形 信道互易性 |
| DOI： |
|
| 基金项目:国家科技重大专项(2012ZX03001010) |
|
| Impact of non-ideal channel reciprocity on beam forming |
| ZHAO Kun,JIANG Zhi-ning |
| () |
| Abstract: |
| In wireless communication systems, the base station can use beam forming
to improve performance based on channel reciprocity. The performance depends on
accuracy of channel reciprocity, which should be analyzed so as to guide system
design. This paper models the channel reciprocity in LTE(Long Term Evolution) systems
,and then points out that the mismatch between the transmitter and receiver an
tenna number of the user equipment and the channel estimation error at the base stati
on can make the channel reciprocity nonideal. Simulation verifies that the
performance of the beam forming is degraded by the nonideal channel reciprocit
y. Ideas to improve system performance are proposed. The conclusi
ons are easily applied for other wireless communication systems with beam forming. |
| Key words: wireless communication LTE system beam forming channel reciprocity |
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