中文说明：1. 典型序列的产生，利用DFT对信号进行频域分析。3. 利用卷积和DFT分析信号及系统的时域和频域特性，验证时域卷积定理。2.
English Description：
1. Generation of typical sequence, frequency domain analysis of signal by DFT. 3. Convolution and DFT are used to analyze the time-domain and frequency-domain characteristics of signal and system and verify the convolution theorem in time domain. 2.