零中频技术在电子系统中的应用

零中频技术已经成为通信发展的全新方向,能够大幅度提高通信芯片的集成度和数字处理能力。在电子系统中,为了拓展信号处理带宽,越来越多地采用I/Q变频体制,其突出优点是不需要中频放大、滤波、变频等电路,从而极大地减小了系统的体积、重量、功耗和成本。介绍零中频的特点,对正交上变频进行分析,给出零中频技术在电子系统中的应用实例。

Zero IF Technology Used in Electronic Systems

The zero IF technology is becoming a new direction of communication development,which can effectively enhance the capacity of integration and the ability of digital processing.Nowadays,there's a trend to apply the I/Q frequency conversion system in the electronic field.Its outstanding advantage is no IF frequency amplified,filtering,and frequency conversion circuit.Thus the system size,weight,power consumption and cost are greatly reduced.This paper introduces the characteristics of zero IF and analyzes the...