摘要
直接数字频率合成器(DDS)具有捷变频、合成任意波形、频率分辨率高等优点,是新一代数字合成宽带雷达、通信信号产生的新技术,但是因为DDS输出频谱杂散电平和谐波电平偏高,为了获得宽带高纯频谱雷达信号需采用DDS+倍频技术。
Direct Digital Synthesis （DDS） is a new technology of signal generator for new digital synthetic wideband radar and communication system, which has characteristics of frequency agility, synthesizing any waves, high frequency resolution and so on. But the output spectrum of DDS has high spur level and high harmonic wave level. So combining frequency multiplication into DDS in order to gain higher pure widehand spectrum of radar signal.
出处
《电脑与信息技术》
2011年第4期24-25,共2页
Computer and Information Technology
关键词
DDS
倍频器
宽带雷达信号
DDS
frequency multiphcation
wideband radar signal
