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Signal Processing: Up and Down Sampling

  • Thread starter coolrp
  • Start date
  • #1
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Homework Statement


Does the upsampling and downsampling have any effect on the amplitude?

consider the following X(e^jw)

25iw5ea.jpg


Homework Equations




what will be the amplitude of the signals? do they remain 1 or are they to be divided/multiplied by L/M, L being upsampling factor and M being downsampling factor?

Please Help.
 

Answers and Replies

  • #2
rude man
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What is "up" & "down" sampling? Do you mean oversampling and undersampling? With relation to Nyquist rate?
 
  • #3
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up and down sampling means increasing or decreasing the sampling frequency!
 
  • #4
rude man
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ƩIncreasing or decreasing the sampling frequency for a given input signal x(t) does not change the amplitude opf the samples.

x(t) after sampling is Ʃx(nT)δ(t - nT) so x(nT) is the only thing that determines amplitude.
 

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