Hadamard precoding for PAPR reduction in optical direct detection OFDM systems

查看全文 作　　者：[1,2]王中鹏;[2]肖江南;[2]李凡;[2]陈林

机构地区：[1]School of Information and Electronic Engineering, Zhejiang University of Science and Technology;[2]School of Computer and Communication, Hunan University

出　　处：《Optoelectronics Letters》索引2011年第7卷第5期,共4页

基　　金：supported by the National High-tech Research and Development Program of China (No.2007AA01Z263);the Natural Science Foundation of Hunan Proviuce of China (No.06JJ50108);the Open Fund of Key Laboratory of Optical Communication and Lightwave Technologies of Education Ministry of China at Beijing University of Posts and Telecommunications 摘　　要：The high peak-to-average power ration (PAPR) values of optical orthogond frequency division multiplexing (OFDM) signal limit the system nonlinear tolerance (NLT). In this paper, a novel method based on Hadamard precoding is proposed to reduce the peak-to-average power ratio in optical direct detection OFDM system. The proposed scheme is successfully applied to an experimental system of optical direct-detection OFDM signal transmission through fiber. In this experiment, the 2.5 Gbit/s binary phase shift keying (BPSK) optical OFDM signals with Hadamard precoding are generated and transmitted though a single mode fiber. The experimental results show that the proposed scheme can reduce PAPR by almost 1.5 dB. Meantime the received sensitivity is improved by 2 dB with 100 km fiber transmission compared with that of an ordinary optical direct detection OFDM system. 关键词：OFDM系统光学检测 PAPR 预编码峰值平均功率比光纤传输系统 OFDM信号非线性误差

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Hadamard precoding for PAPR reduction in optical direct detection OFDM systems

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