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What Is Overlap-add Method? |
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Answer» In this method the size of the INPUT data block xi(n) is L. To each data block we append M-1 ZEROS and perform N POINT circular convolution of xi(n) and H(n). Since each data block is terminated with M-1 zeros the last M-1 points from each OUTPUT block must be overlapped and added to first M-1 points of the succeeding blocks.This method is called overlap-add method. In this method the size of the input data block xi(n) is L. To each data block we append M-1 zeros and perform N point circular convolution of xi(n) and h(n). Since each data block is terminated with M-1 zeros the last M-1 points from each output block must be overlapped and added to first M-1 points of the succeeding blocks.This method is called overlap-add method. |
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