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Information 2018, 9(9), 220; https://doi.org/10.3390/info9090220

Low-Complexity Blind Selected Mapping Scheme for Peak-to-Average Power Ratio Reduction in Orthogonal Frequency-Division Multiplexing Systems

1
School of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, China
2
The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang 050081, China
*
Author to whom correspondence should be addressed.
Received: 7 August 2018 / Revised: 22 August 2018 / Accepted: 29 August 2018 / Published: 31 August 2018
(This article belongs to the Section Information and Communications Technology)
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Abstract

Orthogonal frequency-division multiplexing (OFDM) is an attractive multicarrier technique for the simplicity of equalization and high data throughput. However, the transmitted OFDM signal has a very high peak-to-average power ratio (PAPR), which severely degrades the performance of practical OFDM systems and reduces the efficiency of high-power amplifiers (HPA). The selected mapping (SLM) scheme is an effective PAPR reduction method of OFDM signals. However, this approach usually requires side information (SI) transmission, which increases the difficulty of the hardware implementation with high complexity and reduces the data transmission rate. In this paper, based on designing phase rotation vectors in the time domain, a novel blind SLM method with low complexity is proposed to reduce the PAPR of OFDM signals. At the transmitter, the proposed method properly designs the phase rotation vectors in the time domain, which can be considered as an equivalent wireless channel without SI transmission. At the receiver, the effect of phase rotation vectors can be removed by the conventional channel estimation method, and the data demodulation processing can be easily performed by the frequency domain equalization. Simulation results show that the proposed scheme can achieve low complexity in PAPR reduction and has great robustness in bit error rate (BER) performance compared to the other low-complexity SLM PAPR schemes. View Full-Text
Keywords: orthogonal frequency division multiplexing (OFDM); selected mapping (SLM); peak-to-average power ratio (PAPR); side information (SI) orthogonal frequency division multiplexing (OFDM); selected mapping (SLM); peak-to-average power ratio (PAPR); side information (SI)
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Xia, Y.; Ji, J. Low-Complexity Blind Selected Mapping Scheme for Peak-to-Average Power Ratio Reduction in Orthogonal Frequency-Division Multiplexing Systems. Information 2018, 9, 220.

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