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Clipping noise cancellation in OFDM systems using oversampled signal reconstruction

Saeedi, H ; Sharif University of Technology | 2002

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  1. Type of Document: Article
  2. DOI: 10.1109/4234.984699
  3. Publisher: 2002
  4. Abstract:
  5. Clipping the OFDM signals in the digital part of the transmitter is one of the simplest methods to reduce the peak factor. However, it suffers from additional clipping distortion, peak regrowth after digital to analog conversion, and out-of-band radiation in the case of oversampled sequence clipping. In this letter, we use oversampled sequence clipping to combat the effect of peak regrowth and propose a method to reconstruct the clipped samples and mitigate the clipping distortion in the presence of channel noise at the expense of bandwidth expansion. We show through extensive simulations that by slightly increasing the bandwidth of the system, we can significantly improve the performance while limiting the maximum amplitude of the analog signal
  6. Keywords:
  7. Clipping ; OFDM ; Oversampled signal reconstruction ; Peak to mean envelope power ratio (PMEPR)
  8. Source: IEEE Communications Letters ; Volume 6, Issue 2 , 2002 , Pages 73-75 ; 10897798 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/984699