Upsampling

Upsampling and downsampling in matlab

Upsampling and downsampling in matlab
  1. What is upsampling and downsampling in Matlab?
  2. How to do upsampling in Matlab?
  3. What does downsample mean in Matlab?
  4. What is upsampling and downsampling in signal processing?

What is upsampling and downsampling in Matlab?

Upsample the input data in the matrix xin by a factor of the integer p (inserting zeros) FIR filter the upsampled signal data with the impulse response sequence given in the vector or matrix h. Downsample the result by a factor of the integer q (throwing away samples)

How to do upsampling in Matlab?

y = upsample( x , n ) increases the sample rate of x by inserting n – 1 zeros between samples. If x is a matrix, the function treats each column as a separate sequence. y = upsample( x , n , phase ) specifies the number of samples by which to offset the upsampled sequence.

What does downsample mean in Matlab?

y = downsample( x , n ) decreases the sample rate of x by keeping the first sample and then every n th sample after the first. If x is a matrix, the function treats each column as a separate sequence.

What is upsampling and downsampling in signal processing?

¯ downsampling (decimation) – subsampling a discrete signal. ¯ upsampling – introducing zeros between samples to create a longer. signal. ¯ aliasing – when sampling or downsampling, two signals have same. sampled representation but differ between sample locations.

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