The subject derives from electronic equipment bureau of electronic information industry of department of general equipment of china . the subject researches dds ( direct digital frequency synthesizer ) signal source of the frequency agile signal generator . it plays a good role in the important pre - research project that is the test technology of tactics anti - jamming for communication transceiver synthesis 本课题是总装备部电子信息部电子装备局下达的预研项目? ? 《战术抗干扰通信电台综合测试技术》中的信号源部分(捷变频信号发生器中的dds信号源部分) 。
The primary work in this dissertation : 1 . based on the analysis of direct digital synthesis ( dds ) , this dissertation compares the differences and similarities between direct digital waveform synthesizer ( ddws ) and direct digital frequency synthesizer ( ddfs ) . a dds system is presented , and the theoretical analysis and practical implementation of the system is discussed in details 本文所作的主要工作如下: 1 .全面分析了直接数字合成( dds )技术的工作原理,对比了直接数字波形合成( ddws )及直接数字频率合成( ddfs )两种数字波形产生方法,并就其理论设计和工程实践问题进行讨论。