一种新低通滤波器法实现正交相检的镜频分析

Analysis of Mirror Frequency in a Quadrature Coherent Detector With a New LPF

在给出一种新型低通滤波器法实现正交相干检波基本原理的基础上,分析了其镜频产生的原因,着重讨论了镜频抑制方法并进行了仿真,分析和仿真结果对于工程实现正交相干检波有一定参考价值。

On the basis of using a new LPF to fulfil quadrature coherent detection, this paper analyses the basic principle of mirror frequency generation. And the mirror frequency suppression is discussed emphatically, and the simulation is done. The analysis conclusion and simulation results are of a certain reference to implementing the quadrature coherent detection in engineering.