摘要
介绍了直接数字chirp合成的原理 ,采用信号分析的方法首次详细推导了存在相位截断时采用直接数字合成技术产生chirp信号的频谱 ,得出了存在相位截断时所合成的chirp信号的频谱的数学表达式 ,同时分析了DAC的量化和非理想性对合成的线性调频脉冲信号频谱的影响 。
In this paper, the principle of direct digital chirp synthesis (DDCS) is introduced. Then, based on signal analysis methods, the spectrum of synthesized chirp signal is deduced in detail for the first time when there is phase truncation in DDCS. And the expression of spectrum of a DDCS is derived. The impact of amplitude quantifying error and non-ideal characteristic of DAC on spectrum performance of a DDCS is analyzed also. At the end of the paper, the emulated result is presented.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2001年第4期12-15,57,共5页
Systems Engineering and Electronics
关键词
线性调频
频谱分析
数学信号
雷达
信号分析
Linear frequency modulation Spectrum analysis\ \ Digital signal
