A rectangular pulse train () is shown in figure is convolved with the signal cos(4 x 10). The convolved signal will be a

A rectangular pulse train () is shown in figure is convolved with the

1.	A rectangular pulse train () is shown in figure is convolved with the signal cos(4 x 10). The convolved signal will be a
Answer» First find the Fourier series of given pulse that is And fm from (2) &Rightarrow; 4 kHz When we multiply x1(t) and x2(t - t) We get term like fs ± fm, 2fs ± fm, 3fs ± fm, 4fs ± fm and fs = 10 kHz fm = 4kHz Hence from above relation (10+4) kHz &Rightarrow; 14 kHz signal will be present in x(t).