降低光正交频分复用系统PAPR的算法研究  

Algorithm Research for PAPR Reduction in Orthogonal Frequency Division Multiplexing System

作　　者：刘昊[1] 刘毓[1] 蒋宛霖[1] 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710061

出　　处：《信息技术与信息化》2015年第3期91-93,108,共4页Information Technology and Informatization

摘　　要：本文针对光正交频分复用(O-OFDM)系统的高峰均比(PAPR)问题,提出了联合降低PAPR算法,利用选择映射法随机改变OFDM码元的初始相位分布,降低码元峰值出现的概率,采纳限幅加窗方法降低码元峰值,从而达到降低系统的PAPR。仿真结果表明,联合降低PAPR算法有效降低了O-OFDM系统的PAPR。Aiming at the problem that high PAPR in O-OFDM system ,a new conjoint algorithm for PAPR reduction was proposed, choose SLM is used to randomly change the initial phase distribution of the OFDM symbol to reduce symbol peak probability, adopt clipping window menthod to reduce symbol peak ,so as to achieve that reduce PAPR of the O-OFDM system .The simulation results show that the conjoint algorithm for PAPR can effectively reduce the PAPR in O-OFDM system.

关 键 词：光正交频分复用 峰均比 选择映射法 限幅加窗 

分 类 号：TN929.1[电子电信—通信与信息系统]