MIMO-OFDM系统中相噪公共相位误差的分析与抑制  

Analysis and mitigation of common phase error of phase noises in MIMO-OFDM systems

作　　者：彭聪 许鹏[3] 陈翔[2] 赵明[3] PENG Cong;XU Peng;CHEN Xiang;ZHAO Ming(School of Electronic Communication Technology,Shenzhen Institute of Information and Technology,Shenzhen Guangdong 518172,China;EDA Key Lab,Tsinghua-Shenzhen Research Institute,Shenzhen Guangdong 518057,China;Research Institute of Information Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]深圳信息职业技术学院电子与通信学院,广东深圳518172 [2]深圳清华大学研究院深圳市EDA重点实验室,广东深圳518057 [3]清华大学信息技术研究院,北京100084

出　　处：《太赫兹科学与电子信息学报》2018年第5期813-820,共8页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金资助项目(61501527);广州市协同创新科技专项"空间宽带信息网络地面卫星应用通信系统的研制及应用"、深圳市基础研究基金资助项目(JCYJ20150630153033410,JCYJ20160429170032960)

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多输入多输出正交频分复用(MIMO-OFDM)系统性能的影响也越来越突出,不仅影响OFDM系统载波的正交性,同时导致多天线预编码性能急剧下降。相位噪声对MIMO-OFDM系统的影响可分为公共相位误差(CPE)和载波间干扰(ICI)两部分。本文对CPE影响MIMO-OFDM系统的性能进行深入分析,提出一系列基于频域正交导频设计的CPE估计算法,以实现对CPE的有效抑制;最后,在多个场景下进行链路仿真,充分验证了提出算法的有效性和可靠性。With the actually used frequency band going higher and higher in wireless communications,the influence of phase noise induced by imperfect carrier on Multi-Input Multi-Output Orthogonal Frequency Division Multiplexing(MIMO-OFDM)systems are becoming increasingly acute.This results in not only the destruction of the orthogonality of OFDM system carriers,but also the multiple-antenna precoding performance degradation.The influence of phase noise on MIMO-OFDM systems are composed of Common Phase Error(CPE)and Inter-Carrier Interference(ICI).In this paper,it is first analyzed that how CPE influences the performance of a MIMO-OFDM system,after which a series of novel CPE estimation algorithms are proposed based on frequency domain orthogonal pilot design;finally the validity and reliability of the algorithms are verified by system link simulation under various wireless transmission scenarios.

关 键 词：多输入多输出正交频分复用 相位噪声 公共相位误差 载波间干扰 

分 类 号：TN911.4[电子电信—通信与信息系统]