一种降低MC-CDMA系统峰值功率的方法  

A method to reduce the peak power for MC-CDMA system

作　　者：单树民[1] 黄红兵[1] 李峰[1] 

机构地区：[1]长沙理工大学计算机与通信工程学院,湖南长沙410076

出　　处：《长沙交通学院学报》2007年第4期66-69,共4页Journal of Changsha Communications University

基　　金：湖南省自然科学基金资助项目(05JJ30123);湖南省教育厅科学研究项目(05C246)

摘　　要：给出了一种可称为选择性映射法的方法,即通过随机相位序列矢量与用户数据流矢量做点乘运算后再进行扩频变换与傅立叶变换,以降低MC-CDMA系统峰均功率比.对操作方式进行了改进,即通过模拟通信和计算,获得与用户数据矢量相对应的最优相位序列矢量.将此最优相位序列矢量用于实际通信,可使得实际通信时的计算复杂度降到很低程度.绘制的功率门限曲线表明,改进后的方法是有效的.A method that can be called selected mapping sequences is proposed. In this method, there is a point-multiplication operation between random phase-array vector and consumer data array. Later, there is a spread spectrum operation and a Fourier transform. As a result, the peak-to-average power ratio can be decreased. Further more, the operation pattern of the method is improved, which means that the optimum phasearray vector, which is relativity to consumer data array, can be obtained by the fictitious communication and calculating. When the optimum phase-array vector is used in the real communication, the calculating complexity is reduced to the lowest degree. The drawn power-threshold curve shows that the improved method is effective.

关 键 词：多载波码分多址 正交频分复用 峰均功率比 

分 类 号：TN915.1[电子电信—通信与信息系统]