摘要
时分双工系统中上下行无线信道具有互易性,使得基站可以利用获得的上行信道信息实施开环波束赋形技术。但是基站天线口与基带处理模块之间的射频通道并不对称,在进行校准后由于硬件精度所限会有天线校准误差。为此,根据实测数据对天线校准误差进行建模,通过仿真得出,射频通道校准幅度误差标准差在1dB、角度误差在20°以内时,开环波束赋形技术在误码率为10-5时性能损失小于1dB。并由此给出了对天线校准误差的要求。
The reciprocity between TDD （Time Division Duplex） uplink and downlink wireless channels makes it realizable to apply the uplink channel estimated result for open-loop beamfonning. However, the RF（Radio Frequency）paths between antennas and base-band module axe not symmetrical, which would degrade the performance of beamfonning. This paper models the antenna calibration error, and the simulation results show that within ldB standard deviation of calibration amplitude error, and 20°phase error, the performance degradation is less than 1dB at 10-5 BER（Bit Error Rate）. And this conclusion gives the accuracy requirement of antenna calibration.
出处
《电讯技术》
北大核心
2010年第3期45-48,共4页
Telecommunication Engineering
基金
国家科技重大专项"TD-LTE系统预商用设备开发"课题(2009ZX03002 -001)~~
关键词
时分双工
多输入多输出
开环波束赋形
天线校准误差
信道互易性
time division duplex （TDD）
MIMO
open-loop beamfonning
antenna calibration error
channel reciprocity
