PAPR reduction based on improved Nyquist pulse shaping technology in OFDM-RoF systems  

作　　者：刘剑飞 李宁 卢嘉 曾祥烨 李洁 王蒙军 

机构地区：[1]School of Information Engineering, Hebei University of Technology

出　　处：《Optoelectronics Letters》2013年第1期57-60,共4页光电子快报（英文版）

基　　金：supported by the Natural Science Foundation of Hebei Province (No.F2008000116)

摘　　要：High peak-to-average power ratio (PAPR) is the main disadvantage in orthogonal frequency-division multiplexing (OFDM) communication systems, which also exists in OFDM-radio over fiber (RoF) systems. In this paper, we firstly analyze the impact of high PAPR on a 40 GHz OFDM-RoF system, and then describe the theory of Nyquist pulse shaping technology for reducing PAPR. To suppress PAPR further, an improved Nyquist pulse shaping technology is proposed, in which the distribution of original-data amplitude is changed by properly selecting the time-limited waveforms of the different subcarriers. We firstly apply the improved Nyquist pulse shaping technology to an OFDM-RoF system. The simulation results show that PAPR is effectively reduced by more than 2 dB with the bit error rate (BER) declining by about 0.125%.High peak-to-average power ratio （PAPR） is the main disadvantage in orthogonal frequency-division multiplexing （OFDM） communication systems, which also exists in OFDM-radio over fiber （RoF） systems. In this paper, we firstly analyze the impact of high PAPR on a 40 GHz OFDM-RoF system, and then describe the theory of Nyquist pulse shaping technology for reducing PAPR. To suppress PAPR further, an improved Nyquist pulse shaping technology is proposed, in which the distribution of original-data amplitude is changed by properly selecting the time-limited waveforms of the different subcarriers. We firstly apply the improved Nyquist pulse shaping technology to an OFDM-RoF system. The simulation results show that PAPR is effectively reduced by more than 2 dB with the bit error rate （BER） declining by about 0.125%.

关 键 词：PAPR 奈奎斯特 成形技术 F系统 脉冲 正交频分复用 OFDM 整形技术 

分 类 号：TN919.3[电子电信—通信与信息系统]