一种联合OFDM系统的峰均比抑制方法研究  

Joint PAPR Suppression Method for OFDM System

作　　者：安明 竺小松 AN Ming;ZHU Xiao-song(School of Electronic Countermeasure,National University of Defense Technology,Hefei Anhui 230037,China)

机构地区：[1]国防科技大学电子对抗学院,安徽合肥230037

出　　处：《通信技术》2018年第12期2793-2797,共5页Communications Technology

摘　　要：为了提高正交频分复用(OFDM)系统中信号峰均功率比(PAPR)抑制性能,引入一种基于切比雪夫-范德蒙类矩阵预编码与限幅滤波联合的峰均比抑制方法,从而提高了OFDM信号峰均比抑制效果。该算法通过采用由正交多项式构成的范德蒙类矩阵对信号进行预编码,降低了输入信号的自相关性,再对信号进行限幅滤波,最后实现了抑制OFDM信号的峰均功率比。仿真表明,联合方法相对于单独使用预编码方法或限幅法,能提高OFDM系统的峰均比抑制性能。Aiming at the problem of high peak-to-average power ratio(PAPR)in orthogonal frequency division multiplexing(OFDM)system,a peak-to-average ratio suppression method based on Chebyshev-Vandermonde matrix precoding and clipping filtering is introduced to improve the PAPR suppression effect of OFDM signals.The input data is precoded by the Vandermonde-like matrix of Chebyshev polynomial for reducing the autocorrelation of the input signal.Then the signal is sent to clipping filtering module for suppressing the PAPR of the signal further.The simulation indicates that the joint method can improve the PAPR suppression performance of the OFDM system compared to the pre-coding method or the clipping filtering method alone.

关 键 词：正交频分复用 峰值平均功率比 范德蒙类矩阵 限幅滤波 

分 类 号：TN91[电子电信—通信与信息系统]