只是快速阅读Harry Nyquist于1924年发表的《贝尔系统技术杂志》经典文章(参考文献1)，

并不足以了解以其名字命名的该项准则的真正意义。当时，Nyquist正致力于研究通过带

宽受限的通道传输电报信号。处理数据采样系统时，必须详细了解现代对奈奎斯特准则的

全新诠释。本指南将以通俗易懂的方式介绍奈奎斯特准则如何运用于基带采样、欠采样和

过采样应用。-Just a quick reading Harry Nyquist classic " Bell System Technical Journal article published in 1924 (Reference 1), is not sufficient to understand the true meaning of its named after the guidelines. At that time, Nyquist is dedicated to the study by bandwidth-limited channel transmission telegraph signal. Processing data sampling system must learn more about modern new interpretation of the Nyquist criterion. This guide will be user-friendly way to introduce the Nyquist criterion used in baseband sampling, under-sampling and sampling applications.