基于RF2422正交调制的分析与仿真  

Analysis and Simulation of Quadrature Modulation Based on RF2422 Chip

作　　者：朱红涛[1] 曾文海[1] 汤才刚[2] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]湖北工业大学电气与电子工程学院,湖北武汉430068

出　　处：《无线电通信技术》2008年第4期49-51,共3页Radio Communications Technology

摘　　要：第3代移动通信系统采用了线性化调制方式,对放大器的线性度的要求也很高,因此设计一款高线性度的放大器有着十分重要的意义。针对前馈射频放大器设计中插入导频法自适应控制而采取的一种解决方法:通过RF2422正交调制双音频信号的载波信号作为导频信号,利用音频信号幅度的变化来控制幅度与相位变化,并利用ADS做出部分仿真。Linear modulation has been adopted in the third generation mobile communications systems, and the high linearity of power amplifier is required. So it is important and necessary to design a kind of high linearity amplifier. In this paper, a solution for adaptive control of inserted pilot method in Feedforward Radio Amplifier Design is adopted：dual quadrature audio signals modulated over a carrier signal through chip RF2422 are used as pilot signal. The variation of amplitude and phase can be indicated and controlled by the amplitude variation of the audio signal. Related simulation is performed by using ADS2005 software.

关 键 词：IQ调制 差分输入 RF2422 ADS仿真 

分 类 号：TN761[电子电信—电路与系统]