Abstract: The method of computing,by cyclic convolution,discrete convolution with FFT is discussed.Firstly,the method is developed,based on it a software program is designed.Then the program is verified by an example.

• 文摘:论述利用FFT通过循环卷积计算线性卷积的方法.；先推导计算方法，再设计软件程序，并通过实例说明在计算机上得到的结果