一种利用峰值信号降低OFDM系统峰均比的方法  

Method of Using Peak Signal to Reduce Peak Average Power Ratio of OFDM System

作　　者：何二朝[1] 邵思飞[1] 马如慧[1] 

机构地区：[1]延安大学物理与电子信息学院,陕西延安716000

出　　处：《现代电子技术》2009年第22期150-152,共3页Modern Electronics Technique

摘　　要：针对降低OFDM系统的峰均比,提出一种新的校正函数模型。该模型直接选取高于门限值的峰值作为峰值噪声,然后通过FFT/IFFT变换得到校正因子,与原信号相减得到修正后的信号。实验证明,该模型实现简单,可有效降低峰均比,又由于与原信号的带宽相同,因此不会带来带外干扰,具有一定的实用价值。For reducing the Peak Average Power Ratio （PAPR） of OFDM system,a new correction function model is proposed. The model directly selects the peak above the threshold as noise. A correction factor is obtained by making the peak noise FFT / IFFT transformation,and then it is subtracted by the original OFDM signal to the amended one. The experimental result shows that this model is not only simple,and can effectively reduce the PAPR,but also is same bandwidth as the originals so that no outband interfere being generated. This model has some practical value.

关 键 词：峰均比 峰值噪声 校正因子 FFT/IFFT变换 

分 类 号：TN919[电子电信—通信与信息系统]