一种采用压扩算法来降低OFDM信号PAPR的新方法  

A new method for reducing the PAPR of OFDM signal by using companding algorithm

作　　者：魏克军[1] 益晓新[1] 

机构地区：[1]中国人民解放军理工大学通信工程学院,江苏南京210016

出　　处：《电视技术》2003年第2期14-15,18,共3页Video Engineering

摘　　要：OFDM技术具有很高的峰平功率比(PAPR),这是其实用化的一个瓶颈。针对这一问题,构造了一个新的压扩函数来降低OFDM信号的峰平功率比,通过计算机仿真表明,它不但可以大幅度降低OFDM信号的PAPR,而且,还可以通过适当的选择压扩系数得到一定的系统增益。Orthogonal frequency division multiplexing(OFDM)is one of the multicarrier technique,due to its high band-width efficiency and immunity to multipath fading,more and more attention has been attracted.However,one of the main disadvantages of OFDM is its high peak-to-average power ratio(PAPR),This is a bottleneck of OFDM realization,in order to resolve this problem,we construct a new companding function to reduce the PAPR of OFDM signal.Simulation result shows that the PAPR of OFDM signal can be reduced greatly by using this companding function.Moreover,we can get performance gain by selecting the companding coefficient rightly.[

关 键 词：OFDM PAPR 正交频分复用 峰平均率比 压扩算法 

分 类 号：TN761[电子电信—电路与系统]