摘要
直接数字频率合成(DDS———D igital D irect Frequency Synthesis)是一种新的频率合成技术,具有频率分辨率高、频率切换快、超宽的相对带宽、连续的相位特性和全数字化等优点.DDS实际上是波形的合成技术,可以输出高稳定度的任意波形.对脉冲产生型DDS中输出信号的过冲和振铃进行了讨论,提出了用遗传算法优化脉冲波形以减少过冲和振铃的方法,并用计算机仿真结果进行证明.
Direct Digital Frequency Synthesis (DDS) is a new technology of frequency synthesis, which possesses the advantages of high frequency resolution, fast frequency switching, super - wide relative band width, successive phases, total digitalization, etc. In fact, DDS is a technology for waveform synthesization that is able to output any waveform with high stability. This paper discusses the overshooting and ringing in the output signals in pulse - generating DDS, puts forward the methods to optimize pulse waveforms with the help of genetic algorithm so as to reduce overshooting and ringing, and demonstrates the methods with computer simulation.
出处
《重庆工学院学报》
2005年第11期39-43,共5页
Journal of Chongqing Institute of Technology
关键词
DDS
脉冲信号
遗传算法
波形优化
DDS
pulse signal
genetic algorithm
waveform optimization