一种降低OFDM信号PAPR的编码技术

摘要

介绍OFDM（orthogonalfrequencydivisionmultiplexing）系统的信号传输过程，分析OFDM信号高峰值平均功率比对系统性能的影响，针对降低峰值平均功率比的编码方法，运用Matlab进行了格雷码方法仿真验证，证明该编码方法可以有效解决OFDM信号的高峰值平均功率比问题，可以将信号的峰值平均功率比值控制在3dB内，与输入的数据和子载波数目无关．%The essay introduces the signal transmission in OFDM （orthogonal frequency division multiplexing ） system first, and then analyze the effect of the high PAPR （peak-to-average power ratio） on the system feature. Focusing on the code algorithms of PAPR reduction, the Golay complementary code has been simulated applying Matlab. The experimental results show that the method is an efficient solution of the signal PAPR in OFDM system and limits the maxim value below 3dB.