正交调制器的校准设计

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．需要正交凋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。

The Calibration Design of I/Q Modulator

In many complicated modulated RF source generator at currently, with the more and more input of data 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 amplitude unbanlance and carrier leakage to account. This paper gives a calibration of I/Q modulator,It can reduce and simulate the modulation er...