摘要
直接数字合成器(direct digital synthesizer,DDS)是近年来迅速发展起来的频率合成技术,具有频率分辨率高、频率捷变等诸多优点.但其缺点是杂散抑制性能较差.分析了理想DDS的频谱结构,给出了杂散频谱的产生机理,并据此开发了图形化的频谱分析与杂散预测软件包.测试结果与理论值的对比说明了该软件包的正确性,并对基于DDS技术的频率源设计具有一定的实用性和指导意义.
Direct digital synthesizer （DDS） is a rapidly developing frequency synthesis technology. It has high frequency resolution and extremely fast hopping speed. But it has an disadvantage of poor spur suppression. In this thesis, an ideal DDS spectrum is analyzed. Based on the result, a spectrum analysis and spur prediction software packet is developed. Comparing the simulation with test results, the validity of this packet is comparative practicability and instruction to frequency synthesizer design.
出处
《装备指挥技术学院学报》
2005年第4期91-94,共4页
Journal of the Academy of Equipment Command & Technology
基金
部委级资助项目
关键词
频率合成
DDS
杂散抑制
相位截断
幅度量化
frequency synthesis
direct digital synthesizer（DDS）
spur suppression
phase truncation
quantization distortion
