宽带数字接收机的I/Q通道失配校正  

The Calibration of I/Q Bi-channel Mismatch in Wideband Receiver

作　　者：陈燕[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门362002

出　　处：《宁夏大学学报（自然科学版）》2012年第1期28-30,共3页Journal of Ningxia University(Natural Science Edition)

基　　金：华侨大学科研基金资助项目(08HZR15)

摘　　要：由于各种因素的影响,I/Q通道之间通常会发生失配现象,影响接收机的性能.分析了幅相误差校正参数的提取方法,提出了基于FIR滤波器的宽带数字接收机的数字域校正方法,研究了校正频点数、校正频点位置对系统性能的影响.仿真结果表明,这种方法能有效提高宽带接收机I/Q通道的正交一致性.Due to diversified factors,I/Q mismatch generates and the performance of receiver become worse.This paper analysises the method to estimate the I/Q mismatch errors,and a calibration method of digital correction based on FIR filter for wideband digital receiver is proposed.The influence of the number and the position of calibration frequencies on the system is analyzed.The simulation demonstrates that this method can improve the performance of wideband receiver effectively.

关 键 词：I/Q失配 镜像抑制度 正交解调 增益误差 相位误差 

分 类 号：O174.2[理学—数学]