正交调制器的校准设计  

The Calibration Design of I/Q Modulator

作　　者：周建烨[1] 

机构地区：[1]中国电子科技集团公司第41研究所,安徽蚌埠233006

出　　处：《电子质量》2010年第3期4-7,共4页Electronics Quality

摘　　要：在当前许多复杂调制射频信号源中,随着数字基带信号越来越多的加入,需要正交调制器将其调制到需要的载波信号上。正交调制器原理简单:将生成好的I/Q两路基带信号调制到两路正交的载波上,合路后输出。但是在实现时,想获得好的指标就需要考虑载波相位误差,I/Q基带信号幅度不平衡以及载波泄漏等问题。文章给出了一种正交调制器的校准方案,可以减少和模拟以上三种现象造成的调制误差,并给出自动校准和手动校准两种方法。In many complicated modulated RF source generator at currently, with the more and more input of date baseband signal.we need I/Q modulator to modulate it to the carrier wave.This theory is very easy： modulate the I/Q baseband signal to the I/Q carrier waves and combined output.But if want to gain the good performance must take the carrier phase error, I/Q baseband arnplitude unbanlance and carrier leakage to account, This paper gives a calibration of I/Q modulator.It can reduce and simulate the modulation error which the three reason caused.and gives two ways of auto adjustment end manual adjustment

关 键 词：校准 I/Q调制器 I/Q相位 I/Q幅度 载波泄漏 

分 类 号：TN761[电子电信—电路与系统]