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Signals and Communications 2 > Signal Sampling > Flashcards

Signal Sampling Flashcards

1
Q

Draw the box diagram for a sampled data system

A
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2
Q

Describe perfect sampling

A

We model the sampled signal as a product of the original signal and an impulse train

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3
Q

What happens if the sampling rate is inadequate?

A

The spectrum signals overlap and add together, creating a resonance distortion.

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4
Q

In order to prevent aliasing we use the Nyquist Criterion. State it.

A

To prevent aliasing distortion, a band-limited signal of bandwidth ωm must be sampled at a rate of at least 2ωm rad/s

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5
Q

What is the reconstruction filter and what is its purpose?

A

It is a low pass filter and is used to remove artifacts from the DAC and also remove the spectral images arising from the sampling process.

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6
Q

What is the formula for the discrete-time Fourier Transform?

A
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7
Q

What is the formula for the inverse-DTFT?

A
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Signals and Communications 2 (3 decks)

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