中文摘要：

本文分析了移动通信射频发射机结构，在此基础上对零中频CDMA发射机结构和关键技术进行了理论分析与系统仿真。最后，给出了一种适合于CDMA移动通信试验系统的零中频射频发射机的实现方案，并给出了关键参数和有关模块的设计实现方法。

英文摘要：

This paper analyzes the RF transmitter architectures for mobile phone systems, firstly. Then, theoretical analysis and system simulations with the tool of ADS software are taken carefully aimed at the key technologies of Zero-If architecture. Finally, a practical scheme of Zero-If transmitter architecture for CDMA mobile communication experiment system is proposed with emphasis on the key parameters and design methods.