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Determine whether or not each of the following signals is periodic. In. case a signal is periodic, specify its fundamental period.

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a)

The frequency variable f can be defined by

For every fixed value of the frequency ‘F’.  is periodic indeed. It can be represented.

It is the fundamental period of sinusoidal signal

So it is period with that period.

b)

The frequency variable f can be defined by

So, it is non periodic.

c)

The frequency variable ‘f’ can be defined by

So, it is non periodic. Because the frequency is not expressed in the ratio of two integers.

d)

In this the frequency variable   can be defined by

So, the product of the 

It is non – periodic.

e)

In this the frequency variable  can be defined by

   

    

So,  so,  so, 

So, the   is period.


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