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Clipping noise cancellation in OFDM systems using oversampled signal reconstruction

Saeedi, Hamid and Sharif, Masoud and Marvasti, Farokh (2002) Clipping noise cancellation in OFDM systems using oversampled signal reconstruction. IEEE Communications Letters, 6 (2). pp. 73-75. ISSN 1089-7798. doi:10.1109/4234.984699.

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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. 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.

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Additional Information:© Copyright 2002 IEEE. Reprinted with permission. Manuscript received September 25, 2001. The associate editor coordinating the review of this letter and approving it for publication was Dr. A. Bahai. This work was supported in part by Iran Telecommunication Research Center and in part by the Sharif University of Technology.
Subject Keywords:Clipping, OFDM, oversampled signal reconstruction, peak to mean envelope power ratio (PMEPR)
Issue or Number:2
Record Number:CaltechAUTHORS:SAEieeecl02
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6521
Deposited By: Archive Administrator
Deposited On:12 Dec 2006
Last Modified:08 Nov 2021 20:34

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