基于零中频的短波发射机DSP单元设计与实现  

Design of High Frequency Transmitter's DSP Unit Based on Zero-intermediate Frequency Technology

作　　者：龙剑飞 曹燕[2] 宁更新[2] 

机构地区：[1]广州海格通信集团股份有限公司,广州510663 [2]华南理工大学电子与信息学院,广州510640

出　　处：《科学技术与工程》2009年第7期1706-1711,共6页Science Technology and Engineering

基　　金：广东省自然科学基金博士启动课题(07300583)资助

摘　　要：由于短波的频段比较窄,利用高性能的上变频器AD9857来实现零中频的、直接射频的短波发射机。基于零中频的短波发射机DSP单元是发射机的核心单元,主要包括基带滤波、调制及射频产生、AGC(Auto Gain Control,自动增益控制)、ALC(Auto Level Control,自动功率控制)等功能模块。重点分析DSP单元的电路实现及以上功能模块的设计方法与实现。Because the frequency band is narrow,HF transmitter,which doesn＇t have the intermediate frequency,can be easily realized using the high quality digital up converter AD9857.DSP unit is the core part of transmitter,mainly including functional modules such as baseband filter,modulation and RF generator,AGC,ALC and so on.The realization of the DSP unit＇s circuit and the design methods of those modules are analyzed.

关 键 词：发射机 零中频 数字信号处理(Digital SIGNAL Processing DSP) 

分 类 号：TN830.7[电子电信—信息与通信工程]