摘要
首先介绍了直接数字频率合成(DDS)技术的基本结构和理想情况下DDS的输出信号频谱特性,然后分析了实际应用中DDS杂散信号的主要来源,总结出杂散分布规律,尤其对相位截断时杂散信号的频谱特性进行详细的研究,并利用MATLAB进行仿真验证,给出了仿真结果,最后对一种新的数据压缩方法进行了分析和研究,从而改善了杂散频谱质量。
The fundamental structure of direct digital frequency synthesis（DDS） and the spectrum characteristics of the output signal under ideal conditions are introduced firstly.Then the main sources of DDS spurious signals in engineering are analyzed,and the spurious distributing rules are summarized.A deep study on the spectrum characteristics of spurs brought by phase truncation are discussed in particular and then simulations are performed using MATLAB software to validate the results.Finally,a new method for data compression is expounded in order to improve the spurious spectrum quality.
出处
《电子技术（上海）》
2011年第10期11-13,共3页
Electronic Technology
基金
山东省自然基金重点项目(Z2007G02)
