宽带信号IQ不平衡补偿方法研究  

Research on IQ Imbalance Compensation Method for Wideband Data Link

作　　者：吴轶凡 文阳 吴道龙 茅迪 WU Yifan;WEN Yang;WU Daolong;MAO Di

机构地区：[1]西安导航技术研究所,西安710068 [2]西安卫星测控中心,西安710043

出　　处：《现代导航》2024年第5期363-368,共6页Modern Navigation

摘　　要：宽带信号一般是指频率分布在一个连续的宽频段内的信号,通常用于宽带数据链和毫米波传输系统中,带宽越大,传输数据量也相对越大,宽带信号多为高频段和高阶调制的信号,对IQ不平衡较为敏感,并且宽带信号的频段较高,射频性能和器件的非理想性,会造成更为严重的IQ不平衡问题,导致通信系统性能退化。因此,针对宽带信号的IQ不平衡问题,建立IQ不平衡模型,对IQ不平衡补偿方法进行研究,设计了一种基于数据辅助的宽带信号IQ不平衡补偿方法,具有高效、低复杂度、利于硬件实现等特点,仿真验证了该方法的有效性。Wideband data link refers to the data link used to distribute reconnaissance intelligence such as images,videos,high-speed data stream information,generally speaking,wideband data link is mostly high-frequency and high-order modulation signals,more sensitive to IQ imbalance,and wideband data link frequency band is higher,the non-ideal of radio frequency performance and devices will cause more serious IQ imbalance problem and performance deteriorates of the communication system.Therefore,aiming at the IQ imbalance problem of wideband data link,an IQ imbalance model is established,the IQ imbalance compensation method is studied,and a data-assisted IQ imbalance compensation method of wideband data link is designed,which has the characteristics of high efficiency,low complexity and easy hardware implementation.Simulation verifies the effectiveness of the method.

关 键 词：宽带数据链 数据辅助 IQ不平衡 

分 类 号：TN911.7[电子电信—通信与信息系统]