Hadamard precoding for PAPR reduction in optical direct detection OFDM systems  

作　　者：王中鹏 肖江南 李凡 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》2011年第5期363-366,共4页光电子快报（英文版）

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：Binary phase shift keying Signal detection Single mode fibers Telecommunication systems 

分 类 号：TN919.3[电子电信—通信与信息系统]