- Research Article
- Open access
- Published:
Turbo Decision Aided Receivers for Clipping Noise Mitigation in Coded OFDM
EURASIP Journal on Wireless Communications and Networking volume 2008, Article number: 352597 (2007)
Abstract
Orthogonal frequency division multiplexing (OFDM) is the modulation technique used in most of the high-rate communication standards. However, OFDM signals exhibit high peak average to power ratio (PAPR) that makes them particularly sensitive to nonlinear distortions caused by high-power amplifiers. Hence, the amplifier needs to operate at large output backoff, thereby decreasing the average efficiency of the transmitter. One way to reduce PAPR consists in clipping the amplitude of the OFDM signal introducing an additional noise that degrades the overall system performance. In that case, the receiver needs to set up an algorithm that compensates this clipping noise. In this paper, we propose three new iterative receivers with growing complexity and performance that operate at severe clipping: the first and simplest receiver uses a Viterbi algorithm as channel decoder whereas the other two implement a soft-input soft-output (SISO) decoder. Each soft receiver is analyzed through EXIT charts for different mappings. Finally, the performances of the receivers are simulated on both short time-varying channel and AWGN channel.
Publisher note
To access the full article, please see PDF
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
About this article
Cite this article
Colas, M., Gelle, G. & Declercq, D. Turbo Decision Aided Receivers for Clipping Noise Mitigation in Coded OFDM. J Wireless Com Network 2008, 352597 (2007). https://doi.org/10.1155/2008/352597
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1155/2008/352597