窄带零中频接收机IQ不平衡校准技术研究  

Research on IQ Imbalance Calibration Technology for Narrowband Zero-IF Receiver

作　　者：王红举 WANG Hongju

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068

出　　处：《现代导航》2018年第2期114-118,共5页Modern Navigation

摘　　要：针对窄带零中频接收机存在的IQ不平衡问题,设计实现了一种基于信号统计的IQ不平衡校准方法。首先建模分析了IQ不平衡对接收机性能的影响,在此基础上使用基于信号统计的方法对幅度和相位不平衡参数进行估计,进而实现IQ不平衡的补偿。实验测试表明,本文所设计算法能够有效实现窄带零中频接收机IQ不平衡的校准。In view of the influence of the In-phase/Quadrature-phase(IQ)imbalance on the narrowband zero-IF receiver,this paper designs and implements a blind IQ imbalance calibration scheme base on signal statistical technique.The mathematical model of the narrowband receiver’s IQ imbalance is researched firstly,then,the imbalance coefficients of the amplitude and phase can be estimated based on signal statistical technique in order to compensate the IQ imbalance.According to the test results,the calibration scheme implemented in this paper can efficiently accomplish the narrowband zero-IF receiver’s IQ imbalance calibration.

关 键 词：窄带零中频接收机 IQ不平衡 信号统计 

分 类 号：TN911[电子电信—通信与信息系统]