摘要
离散傅里叶变换是计算机对信号频谱进行分析的理论基础,在《数字信号处理》这门课程中进行了详细的理论推导。学生在对这部分内容做实验的过程中,往往会忽视实验结果里面出现的一些由栅栏效应引起的细小差别。本文重点阐述连续周期信号频谱由栅栏效应导致的误差并提出相应的改善方法。文章还结合了实际的例子在MATLAB环境下进行了分析和验证。
Discrete Fourier Transform(DFT) is the theoretical basis for the analysis of the signal spectrum, with the theory derivedin detail in the course of Digital Signal Processing. Students tend to ignore some minor differences caused by the fence effect in experimental results when conducting the experiment. This paper mainly elaborates on the error caused by the fence effect in the periodic signal spectrum analysis and the corresponding improving methods are proposed. Practical examples are also combined to beanalyzed and verified in the MATLAB environment.
出处
《电脑知识与技术（过刊）》
2015年第9X期196-198,共3页
Computer Knowledge and Technology
关键词
栅栏效应
周期信号
DFT
谱分析
fence effect
periodic signal
DFT
spectral analysis
