Data

Implementation of Overlap Save Filtering with Decimation

Implementation of Overlap Save Filtering with Decimation
  1. How do you overlap a save method?
  2. How do you solve Overlap-add and overlap save method?

How do you overlap a save method?

Overlap Save Method

Let the length of input data block = N = L+M-1. Therefore, DFT and IDFT length = N. Each data block carries M-1 data points of previous block followed by L new data points to form a data sequence of length N = L+M-1. First, N-point DFT is computed for each data block.

How do you solve Overlap-add and overlap save method?

Two methods that make linear convolution look like circular convolution are overlap-save and overlap-add. The overlap-save procedure cuts the signal up into equal length segments with some overlap. Then it takes the DFT of the segments and saves the parts of the convolution that correspond to the circular convolution.

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