中频信号正交解调原理与实现

The principle and implementation of IF signal quadrature demodulating

通过对正交解调原理的分析和对AD9580、RF2713芯片介绍,提出了一种中频信号解调的实现方案作为通用中频信号接收处理平台,完成了对载频为48MHz、带宽为4MHz扩频信号的接收处理。

This paper discusses the principle of IF(Intermediate Frequency) signal quadrature demodulating, and introduces the functional principle of chips AD9850 and RF2713. The paper also discusses the implementation of carrier synchronization, and presents a scheme of IF signal quadrature demodulating using AD9850, RF2713 and FPGA as a platform of receiving and treatment for general IF signals, by which IF signals of different carrier and different modulation can be processed.