一种降低OFDM-CDMA峰值功率的方法  

A method of reducing OFDM-CDMA peak power

作　　者：田永红[1] 刘维明[1] 周月臣[1] 

机构地区：[1]南京邮电学院移动通信教研室,江苏南京210003

出　　处：《电力系统通信》2001年第5期9-11,共3页Telecommunications for Electric Power System

摘　　要：多载波CDMA和多载波调制技术除了具有抗多径干扰和易于用FFT实现等优点外 ,还呈现出很大的峰平功率比 (PAPR) ,导致信号失真。针对这一问题 ,文中提出了一种基于相位调节选择传输降低OFDM -CDMA下行链路PAPR的方法。方案实现简单 ,在适当增加系统复杂度和引入极小冗余度基础上能较有效降低信号峰平功率比。Multicarrier CDMA and MCM technology have a lot of advantages, such as :have a strong immunity to multipath interference and simple realization by means of FFT algorithms and so on, but they present a large peak to average power ratio(PAPR), which leads to distortions. For solving the problem a method to reduce downlink of OFDM CDMA PAPR based on phase adjustment and selected translation has been proposed. It is easy to realize and can efficiently reduce the PAPR at the price of properly adding system complexity and few redundancies.

关 键 词：数字移动通信系统 峰值功率 OFDM-CDMA 数据传输 

分 类 号：TN929.5[电子电信—通信与信息系统]