In Linear system, Fourier Transform (FT), Fourier Series (FST), Fourier Z Transform (FZT) and Discrete Fourier Transform (DFT) are used to analyze and process signals.

• 在信号分析与处理中,常涉及的积分变换是傅里叶变换(FT)、傅里叶级数(FST)、傅里叶Z变换(FZT)及离散付里叶变换(DFT)。