MIMO-OFDM系统中各天线独立相位噪声的影响

彭聪; 许鹏; 陈翔; 赵明

doi:10.11999/JEIT170260

MIMO-OFDM系统中各天线独立相位噪声的影响

doi: 10.11999/JEIT170260

彭聪¹,
许鹏¹,
陈翔¹,
赵明¹

基金项目:

国家自然科学基金(61501527)，广州市协同创新科技专项，深圳市基础研究基金

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- 被引次数: 0
出版历程
- 收稿日期: 2017-03-29
- 修回日期: 2017-09-16
- 刊出日期: 2017-12-19

Influence of Independent Phase Noises on MIMO-OFDM Systems

Funds:

The National Natural Science Foundation of China (61501527), Guangzhou Cooperative Innovation Technology Special, The Science, Technology and Innovation Commission of Shenzhen Municipality

摘要

摘要: 随着无线通信频段的不断提高，非理想载波所引入的相位噪声对OFDM系统正交性的破坏也越来越不容忽视。与此同时，受天线间距离等实际因素的限制，发送或接收端的天线间可能无法共用载波时钟，导致不同天线上的相位噪声互相独立。该文在各天线独立的相位噪声的假设下，得出了MIMO-OFDM系统各子流检测误差的自相关矩阵的近似表达式，其中公共相位误差(CPE)，载波间干扰(ICI)和热噪声的影响具有可加性，且对于CPE和ICI二者而言，收发相位噪声的影响也近似可加。上述理论推导的合理性通过计算机仿真得以验证。
- 多输入多输出正交频分复用 /
- 相位噪声 /
- 公共相位误差(CPE) /
- 载波间干扰(ICI)
Abstract: With the actually used frequency band going higher and higher in wireless communications, the influence of phase noise induced by imperfect carrier on OFDM systems can no longer be ignored. At the same time, the restrictions on the antenna spacing may make it impossible for different antennas to share the same carrier clock. In a MIMO-OFDM system with independent phase noises on different antennas, the approximate expression of error covariance matrix for demodulated data streams is given, and it is shown that the influence of CPE, ICI and additive noise are additive and independent of each other; besides, for both CPE and ICI, the influence of phase noises induced by the transmitter or the receiver are additive and independent of each other too. The validity of the theoretical deduction is verified by numerical simulation.
- MIMO-OFDM /
- Phase noise /
- Common Phase Error (CPE) /
- Inter-Carrier Interference (ICI)

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参考文献(16)

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