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Electronics 2018, 7(2), 11; https://doi.org/10.3390/electronics7020011

Low-Complexity PAPR Reduction Scheme Combining Multi-Band Hadamard Precoding and Clipping in OFDM-Based Optical Communications

1
School of Electronic and Information Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China
2
School of Information Science and Engineering, Southeast University, Nanjing 210096, China
3
School of Electronic Information, Shanghai Dianji University, Olive Road, Shanghai 200240, China
*
Author to whom correspondence should be addressed.
Received: 24 December 2017 / Revised: 16 January 2018 / Accepted: 17 January 2018 / Published: 23 January 2018
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Abstract

In this paper, we propose a low-complexity peak-to-average power ratio (PAPR) reduction scheme that combines both multi-band (MB)-Hadamard precoding and clipping for the optical orthogonal frequency division multiplexing (OFDM) systems. Approximations of PAPR distribution for baseband OFDM signals are analyzed and the effective signal-to-noise ratio (SNR) of the whole transmission link considering both the clipping and quantization noise are presented. After that, the MB-Hadamard precoding is adopted to compresses the peak signals, minimizing the contaminating influence of signal distortions in subsequent clipping operations. In addition, the received SNRs and bit error rate (BER) are calculated theoretically for each split sub-band. The 50-m step-index polymer optical fiber (POF) transmission is adopted as a special case to both evaluate the system performance and then compare the proposed scheme with other well-known PAPR reduction techniques. With this scheme, the PAPR is reduced effectively and the system’s BER performance is improved significantly. The results show that the proposed scheme with appropriate number of sub-bands precoding provides favorable trade-offs among PAPR reduction, power spectral density, transmission rate, BER, and computational complexity, which demonstrates its feasibility and validity. View Full-Text
Keywords: orthogonal frequency division multiplexing; peak-to-average power ratio; optical communication; multi-band Hadamard; clipping orthogonal frequency division multiplexing; peak-to-average power ratio; optical communication; multi-band Hadamard; clipping
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Miao, P.; Chen, P.; Chen, Z. Low-Complexity PAPR Reduction Scheme Combining Multi-Band Hadamard Precoding and Clipping in OFDM-Based Optical Communications. Electronics 2018, 7, 11.

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