摘要
对基于DDS技术的线性调频信号数字产生系统的设计与实现进行了研究。首先介绍了DDS产生调频信号的原理,并对DDS系统误差进行了分析,对采用数字技术基带信号产生的2种方法进行了比较。给出了用直接数字合成加正交调制方法产生线性调频信号的方案,并对其进行了系统实现研究。
This paper introduces the principle to generate the linear FM signal, and then discusses the distribution and the restraint methods of the DDS spurs. It also compares the direct digital synthesis technique and the stored digital waveform direct reading technique. Depending on the theoretical analysis, the author has implemented a wide band LFM signal generator according to the scheme of direct digital synthesis and orthogonal modulation.
出处
《无线电工程》
2006年第1期27-29,共3页
Radio Engineering
关键词
DDS
频率合成
线性调频
正交调制
DDS
frequency synthesis
linear FM
orthogonal modulation
