MIMO-OFDM系統(tǒng)中各天線獨立相位噪聲的影響

彭聰; 許鵬; 陳翔; 趙明

doi:10.11999/JEIT170260

MIMO-OFDM系統(tǒng)中各天線獨立相位噪聲的影響

doi: 10.11999/JEIT170260

彭聰¹,
許鵬¹,
陳翔¹,
趙明¹

基金項目:

國家自然科學(xué)基金(61501527)，廣州市協(xié)同創(chuàng)新科技專項，深圳市基礎(chǔ)研究基金

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- 文章訪問數(shù): 1269
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- 被引次數(shù): 0
出版歷程
- 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: 隨著無線通信頻段的不斷提高，非理想載波所引入的相位噪聲對OFDM系統(tǒng)正交性的破壞也越來越不容忽視。與此同時，受天線間距離等實際因素的限制，發(fā)送或接收端的天線間可能無法共用載波時鐘，導(dǎo)致不同天線上的相位噪聲互相獨立。該文在各天線獨立的相位噪聲的假設(shè)下，得出了MIMO-OFDM系統(tǒng)各子流檢測誤差的自相關(guān)矩陣的近似表達式，其中公共相位誤差(CPE)，載波間干擾(ICI)和熱噪聲的影響具有可加性，且對于CPE和ICI二者而言，收發(fā)相位噪聲的影響也近似可加。上述理論推導(dǎo)的合理性通過計算機仿真得以驗證。
- 多輸入多輸出正交頻分復(fù)用 /
- 相位噪聲 /
- 公共相位誤差(CPE) /
- 載波間干擾(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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參考文獻(16)

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