Modified Overlap-Add and Overlap-Save Convolution Algorithms for Real Signals

@article{Narasimha2006ModifiedOA,
  title={Modified Overlap-Add and Overlap-Save Convolution Algorithms for Real Signals},
  author={Madihally J. Narasimha},
  journal={IEEE Signal Processing Letters},
  year={2006},
  volume={13},
  pages={669-671}
}
Modified overlap-save and overlap-add algorithms for filtering a real signal by an N-tap finite impulse response filter are delineated. These algorithms compute two N-sample output blocks simultaneously at every processing step using 2N-point transforms, while the traditional methods compute only one N-sample block with the same length transforms. They achieve streamline processing for real signals but incur an additional delay of N samples 

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