一种降低OFDM系统PAPR的参数化整形脉冲  

A Parametric Shaping Pulse for PAPR Reduction in OFDM System

作　　者：杨宏周 杨灿美[1] 

机构地区：[1]中国科学技术大学信息科学技术学院,安徽合肥230027

出　　处：《通信技术》2014年第5期483-487,共5页Communications Technology

摘　　要：在应用脉冲整形(PS)技术降低OFDM系统PAPR的基础上,提出一种新颖的参数化的Nyquist脉冲称之为参数化正切脉冲,此脉冲包含的设计参数k可以根据系统滚降系数β自由调整,从而尽量降低系统的PAPR。仿真结果表明,相比于常见的升余弦脉冲和反转指数脉冲,新提出的脉冲在降低PAPR性能和保证BER性能方面优势明显,是一种灵活低复杂度的降低OFDM系统PAPR的脉冲整形方案。A new and parametric Nyquist pulse named as parametric tangent pulse is proposed for peak-to -average power ratio （PAPR） reduction in orthogonal frequency division multiplexing （OFDM） systems using pulse shaping . The proposed pulse contains a new design parameter, k, giving an additional degree of freedom to minimize PAPR for a given roll-off factor, ]3 . Simulation results indicate that the proposed pulse can achieve better performance in terms of PAPR reduction and bit error rate （BER） , as compared with the traditional raised cosine pulse and flipped-exponential pulse. It is an effective scheme with low complexity and high flexibility to reduce the PAPR of OFDM system by pulse shaping with the proposed parametric tangent Nyquist pulse.

关 键 词：正交频分复用 峰均功率比 参数化 脉冲整形 

分 类 号：TN924[电子电信—通信与信息系统]