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Signal Processing

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  • $\begingroup$ Assuming your horizontal axis is in seconds, you have 3 full cycles in 2 seconds, which gives a fundamental period of 3/2 Hz = 1.5 Hz, as you were expecting. $\endgroup$ Commented Mar 12, 2016 at 23:34
  • $\begingroup$ @MattL. Thanks, Matt, but $x(k)$ is defined as a continuous periodic function. You could replace k by t. $\endgroup$ Commented Mar 13, 2016 at 6:37
  • $\begingroup$ @ Jazzmaniac Thanks for pointing that out, but... how do you identify the three cycles visually? I can't see them, or see a form of $x(n+N)$ which implies periodicity. $\endgroup$ Commented Mar 13, 2016 at 6:38