user1068636

### Questions (10)

 3 How do I use the step and ramp functions to create a specific signal? 1 How do I interpret an image of a spectrogram of an audio wind signal? 1 How do you show the Discrete Time Fourier Transform of $x[n]=\cos(2\pi f_0n)$ is $\frac{1}{2} \delta(f+f_0) + \frac{1}{2}\delta(f-f_0)$? [duplicate] 0 Confusion about subtle difference between discrete-time and continuous-time 0 What is an example of using aliasing to your advantage when recovering an input signal?

### Reputation (175)

 +18 How do I interpret an image of a spectrogram of an audio wind signal? +10 How do you show the Discrete Time Fourier Transform of $x[n]=\cos(2\pi f_0n)$ is $\frac{1}{2} \delta(f+f_0) + \frac{1}{2}\delta(f-f_0)$? +30 How do I use the step and ramp functions to create a specific signal?

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### Tags (17)

 0 continuous-signals × 3 0 periodic × 2 0 discrete-signals × 3 0 aliasing 0 complex × 3 0 dft 0 fourier-transform × 2 0 digital-communications 0 phase × 2 0 spectrogram

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