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所谓接通周期信号就是t<0o时恒为0,而t>0时呈现周期性变化的信号。这类信号的拉普拉斯变换公式并不复杂,一般书中均有论及。但是论述信号分析的书及文献中,对这类信号的付里叶变换未见给出,通常只是给出特殊的接通周期信号,如sinw_0tU(t),cosw_0tU(t)的变换式。本文将提出一个接通周期信号付里叶变换的一般公式。
The so-called on-cycle signal is t <0o constant for the 0, and t> 0 showed periodic changes in the signal. The Laplace transform of such signals is not complicated and is covered in the general book. However, in the book and literature dealing with signal analysis, Fourier transforms of such signals are not given, and usually only give special on-cycle signals, such as the transforms of sinw_0tU (t), cosw_0tU (t). This paper presents a general formula for the Fourier transform of the on-period signal.