摘要
详细介绍了步长为５Ｈｚ的６０ＭＨｚ直接数字频率合成器的设计过程，同时说明了本课题采用锁相环方案实现的难度和缺点，然后结合样机的测试结果，分析了输出信号的频谱分布规律，最后给出了本课题需改进的措施以及ＤＤＳ在雷达中的应用方向。
The methods designing about 60MHz,in 5Hz step, direct digital frequency synthesizer (DDS) are introduced in this paper. Meanwhile the difficulties and drawbacks in this project with phase locked loop (PLL) are presented. On the basis of test results, the distribution characteristics of output spectrum are analyzed. In the end, the improved measurements in the project and the prospect about DDS applying to radar are given.
出处
《系统工程与电子技术》
EI
CSCD
1999年第7期47-50,共4页
Systems Engineering and Electronics
关键词
数字式
频率合成器
相位噪声
分辨率
设计
Direct digital frequency synthesizer Phase noise Spurious Frequency resolution Spectrum
