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针对教学过程中遇到的单位阶跃序列的离散时间傅立叶变换对表达式不利于理解和掌握的问题,分析了其不足之处及其原因,介绍了作者教学时采用的一种表达式形式,并讨论了所采用表达式对教学效果的影响。
In order to solve the problems that the expressions are not conducive to understanding and mastery, the shortcomings and causes of discrete time Fourier transformation of unit step sequence encountered in the teaching process are analyzed. An expression form adopted by the author for teaching is introduced. The effects of the expressions used on teaching effectiveness are discussed.