摘要
首先介绍了直接数字合成(DDS)技术的基本原理和理想情况下DDS的输出信号频谱结构,然后分析了工程实际中DDS的误差信号来源,从信号与系统理论的角度解释了相位截断和幅度量化引起的DDS输出信号频谱的杂散,并在最后对D/A的非理想特性和参考时钟相位噪声的影响作了简要的说明。
The fundamental theory of direct digital synthesizer（DDS） and the speetmm of the output signal under the ideal conditions are introduced firstly. Then the error signal in engineering is analyzed. The output signal background spurious brought about by phase truncation and digital anlplitude are explained from the angle of the theory of signal and system, and in the end the effects of D/A＇s none ideal characteristics and the dock＇s phase noise are expounded.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2005年第6期53-56,共4页
Journal of National University of Defense Technology
基金
国家863基金资助项目(2002AA731130)
关键词
DDS
背景杂散
相位截断
DDS
background spurious
phase tnmcation
