宽带数字中频设计  

The Design of Broadband Digital Frequency System

作　　者：张福洪[1] 赵晓红[1] 戴绍港[1] 

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018

出　　处：《电子器件》2009年第5期920-923,共4页Chinese Journal of Electron Devices

摘　　要：在3G直放站中,基于软件无线电的数字中频技术得到广泛应用。提出一种针对高中频信号的宽带数字中频设计,优点是减少模拟环节,降低信号失真,减小噪声,简化电路,实现数字中频带宽、频带可调。分析了方案设计、硬件结构、FPGA实现,提出了自动增益控制一种新的设计思路。测试结果表明了方案的可行性。As the software defined radio based Digital IF technology has been widely used in 3G repeater.This paper presents a design of the wideband digital IF system.It deals with IF and high-frequency signal.The advantages are that the system reduces the part of analog circuit,gets less of signal distortion and noise.At the same time,it simplifies the circuit.It has the function of selecting bandwith and frequency.The paper analyzes the design of program and the structure of hardware.Also,it introduces the realizationof FPGA and proposes a new AGC design. Test results show the feasibility of program.

关 键 词：软件无线电 高中频 宽带数字中频 可调 自动增益控制 

分 类 号：TN91[电子电信—通信与信息系统]