摘要
提出了一种提高周期信号ＤＦＴ分析精度的同步抽样技术，对其原理作了详细的分析，给出了实现电路。文中以一组周期信号的ＤＦＴ分析为例，比较了信号谱的幅度和相位误差，其结果表明频谱精度大大提高。
This paper presents a synchronous sampling technology to improve the accuracy of periodic signal DFT analysis. The theoretical support is analyzed in detail, and the hardware structure is introduced. As an example of application of this device, the results of the DFT analysis on a multi frequency signal are given, and the accuracy of these measurements is improved highly.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2000年第1期65-68,共4页
Journal of University of Electronic Science and Technology of China
关键词
周期信号
离散傅里叶变换
抽样
数字信号处理
periodic signal
sampling theory
digital Fourier transform
synchronous technology
digital phase lock loop
