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一1.信号带宽:一个随时间而变化的周期性信号如图一,可以用傅里叶级数来表示:信号f(t)的频谱如图二所示当周期丁增大时,谱线间距压缩谱线包络成为连续的脉冲宽度r减小时,信
A 1. Signal bandwidth: A periodic signal that varies with time is shown in Figure 1. It can be expressed in Fourier series: the spectrum of signal f (t) is shown in Figure 2. When the period increases, the spectral line Pitch compression spectrum envelope becomes continuous when the pulse width r decreases, the letter