论文部分内容阅读
该文分析了《数字信号处理教程》中三个重要的知识点。一是正弦序列的周期性,只有在为有理数(包括整数)时才为周期的;二是有限长序列的线性卷积与圆周卷积的关系,当L≥N1+N2-1时,L点圆周卷积能代表线性卷积;三是序列移位的规律,它不仅与移位常数前的符号有关,而且和序列变量前的符号有关。并通过例题充分说明了这三个观点。2pw
This article analyzes three important points in the “Digital Signal Processing Tutorial.” The first is the periodicity of the sine sequence, which is periodic only when it is a rational number (including integers). The second is the relationship between the linear convolution and the circular convolution of a finite length sequence. When L≥N1 + N2-1, L Circumferential convolution can represent linear convolution; Third, the law of sequence shift, not only with the symbol before the shift constant, but also with the symbol before the sequence variable. The examples fully illustrate these three views. 2pw