一种联合正交带复用与限幅方法的CO-OFDM峰均比降低策略  

A new strategy to reduce PAPR by combining OBM and clipping for CO-OFDM

作　　者：王汝言[1] 左琼华[1] 吴大鹏[1] 王卓[1] 崔欣[1] 

机构地区：[1]重庆邮电大学光互联网及无线信息网络研究中心,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2011年第4期379-383,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金(60972096);重庆市教委科学技术研究项目(KJ070511;KJ080513);重庆市科委科技攻关项目(CSTC2005AC2089);教育部春晖计划项目(教育部教外司留[2007]567号)~~

摘　　要：为了降低相干光正交频分复用(coherent optical orthogonal frequeng division multiplexing,CO-OFDM)系统的高峰均值比(peak to averqge vatio,PAPR),提出一种正交带复用(orthogonal band multiplexing,OBM)和限幅相结合的策略,该策略通过正交带复用将输入的子载波进行分带来减少IFFT的采样点数达到降低CO-OFDM系统的高峰均值比的目的,正交带复用与限幅方法相结合进一步降低CO-OFDM系统的高峰均值比。仿真结果表明,该策略能有效地降低信号幅值超过门限值的概率,从而达到进一步降低CO-OFDM系统的峰均值比,提高系统性能。This paper proposes a novel strategy by combing OBM（ Orthogonal-band Multiplexing） and clipping to reduce the peak to average ratio in CO-OFDM systems. The basic principle of this strategy is to partition the CO-OFDM into multiple sub-band to decrease the sample points of IFFT, and then combine with clipping to further reduce the peak to average ratio, Simulation results show that the new strategy can effectively reduce the probability of signal＇s breadth exceeding the limit and turther reduce the peak to average ratio in C0-0FDM systems, and improve the system performance.

关 键 词：相干光正交频分复用(CO—OFDM) 正交带复用(OBM) 峰均值比(PAPR) 限幅 

分 类 号：TN914[电子电信—通信与信息系统]