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Inter-antenna and subblock shifting and inversion for peak-to-average power ratio reduction in MIMO-OFDM systems

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The Journal of China Universities of Posts and Telecommunications 2007年第4期14卷 41-45页

作者： WANG Yi TAO Xiao-feng Key Laboratory of Universal Wireless Communications (Beijing University ofPosts and Telecommunications) Ministry of Education Wireless TechnologyInnovation Institute Beijing 100876 China

In this article, an inter-antenna inter-subblock shifting and inversion （IASSI） scheme is proposed to reduce the peak-to-average power ratio （PAPR） in multi-input multioutput orthogonal frequency division multiplexing （MIMO- OFDM） systems. It exploits multiple antennas and subblocks to provide additional degrees of freedom to benefit the system. To reduce the implementation complexity of the proposed scheme, two simple suboptimal schemes are further presented based on the minimum current maximum criterion; one adopts sequential search and the other employs random binary grouping. The simulation results exhibit the effectiveness of these proposed schemes.

关键词： peak-to-average power ratio inter-antenna and subblock shifting and inversion sequential search randombinary grouping multi-input multi-output orthogonal frequencydivision multiplexing

Simulation on peak-to-average power ratio for Orthogonal Frequency Division Multiplexing

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1873-1876页

作者： SHAN Weifeng MENG Baohong LIU Ningning LI Hui ZHANG Hongwei Department of Command Communication and Command Academy Wuhan 430010 Hubei China

Clipping is a simple and convenient PAPR （peak-to-average power ratio） reduction method for high speed OFDM （orthogonal frequency division multiplexing） communication system. In this paper, we propose a new PAPR reduction method for Wireless-MAN（metropolitan area network）-OFDM system based on IEEE 802.16, which is over-sampling clipping arithmetic. Simulation and performance of the over-samples clipping＇s PAPR reduction capability, BER effect is given. The simulation indicates that the PAPR of at least 99.9% OFDM symbol is below 6dB after 2 Nyquist rate clipping, and the performance of BER has 1dB SNR（signal noise ratio） loss. The results prove that this method has better capacity to reducing PAPR. So it can be well used in WMAN-OFDM system.

关键词： peak-to-average power ratio OFDM（orthogonal frequency divisior multiplexing） clipping

Clipping discrete multi-tone for peak-power-constraint IM/DD optical systems

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Science China(Information Sciences) 2023年第5期66卷 227-237页

作者： Ji ZHOU Liangchuan LI Jiale HE Xiaofeng LU Yu BO Guanyu WANG Yuanda HUANG Gengchen LIU Yanzhao LU Shecheng GAO Yuanhua FENG Shancheng ZHAO Weiping LIU Changyuan YU Zhaohui LI Department of Electronic Engineering College of Information Science and Technology Jinan University Optical Research Department Huawei Technologies Co. Ltd. Department of Electronic and Information Engineering The Hong Kong Polytechnic University Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen University Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)

High peak-to-average power ratio(PAPR) is a major drawback of discrete multi-tone(DMT) in peak-power-constraint(PPC) intensity-modulation/direct-detection(IM/DD) optical systems. Symmetric clipping operation is a frequently-used and practical method for mitigating the PAPR of the DMT signal.However, clipping noise is inevitably induced by the symmetric clipping operation, thereby deteriorating the system’s performance. In this paper, we study the statistical characteristics of the clipping noise in detail.Depending on the statistical characteristics, clipping-noise-cancellation(CNC) algorithms are proposed to mitigate the clipping noise in the clipping DMT systems. Theoretically, the clipping noise can be completely removed using the low-density-parity-check-assisted CNC algorithm(LDPC-assisted CNC algorithm). To verify the superiority of the clipping DMT with the CNC algorithm, we conduct an experiment with a50 Gb/s DMT system using 10G-class commercial devices for the scenario of PPC passive optical networks.The receiver sensitivity of the clipping DMT system with the CNC algorithm can reach-24 d Bm at a 20%soft-decision forward-error-correction limit, which is 2.5 d B higher than that of the DMT system without clipping operation. The clipping operation and the CNC algorithm are added after the original digital signal processing, thereby demonstrating the potential to efectively overcome the drawback in DMT signals and other high-PAPR signals.

关键词： discrete multi-tone peak-to-average power ratio peak-power constraint clipping-noise cancellation intensity-modulation/direct-detection optical systems

A novel method for PAPR reduction of the OFDM signal using nonlinear scaling and FM

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Frontiers of Information Technology & Electronic Engineering 2019年第11期20卷 1587-1594页

作者： Yi-hu XU Jung-Yeol OH Zhen-hao SUN Myoung-Seob LIM Deptarment of Communication Engineering Yanbian UniversityYanji 133002China Electronics and Telecommunications Research Institute(ETRI) Daejeon 305-700Republic of Korea Division of Electronics&Information Engineering Chonbuk National UniversityJeonj 561-756Republic of Korea

Orthogonal frequency division multiplexing (OFDM) has been adopted as standard beginning with the 4th generation mobile communication system because of its high-bit-rate transmission capability under frequency selective fading channel con-ditions. However, a major disadvantage of OFDM is the non-constant envelope signal with a high peak-to-average power ratio (PAPR). The high peak signal in OFDM is distorted through a nonlinear amplifier, which causes bit error ratio (BER) reduction. Many techniques have been developed for reducing PAPR at the cost of inefficient bandwidth usage or throughput because of the additional information about PAPR reduction. We propose a novel method, in which the high peak signal above the threshold of the nonlinear amplification region is nonlinearly downscaled to lower the PAPR. The time slot location and scaling ratio for where and how the high peak baseband OFDM signal is downscaled are transmitted using frequency modulation (FM) combined with OFDM, which requires less additional bandwidth than the previously proposed methods. Simulation results show that the pro-posed novel method provides a lower PAPR and elicits a better BER performance compared with other conventional methods, because it reduces the PAPR by nonlinear scaling and restores the pre-distorted signal using FM.

关键词： Orthogonal frequency division multiplexing peak-to-average power ratio Nonlinear scaling Frequency modulation

A new Method based on PTS for reducing PAPR in OFDM

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A new Method based on PTS for reducing PAPR in OFDM

A Modified Phase Transmit Sequences Approach to Reduce PAPR in LTE System

2007北京地区高校研究生学术交流会通信与信息技术会议

作者： Su Hongwei Zhang Peng Hao Yugai (School of communication & control Engineering Southern Yangtze University No.1800 Li Hu Road,Wuxi,214122,China)

High peak-to-average power ratio(PAPR)of the transmitted signal is a principal drawback of OFDM (Orthogonal frequency division multiplexing).We present a trellis structure based on PTS faotor search m

关键词： Orthogonal Frequency Division Multiplexing peak-to-average power ratio Partial Transmit Sequences

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A Modified Phase Transmit Sequences Approach to Reduce PAPR ...