一种新的时变多径环境下OFDM系统参数选取方法  

A Novel OFDM Parameter Selection Scheme over Time Varying Multipath Channel

作　　者：韩湘[1] 魏急波[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《系统仿真学报》2005年第10期2459-2462,2466,共5页Journal of System Simulation

摘　　要：分别针对CP长度大于和小于最大多径时延两种情况,分析了由时变多径环境引入的ISI分量和子载波间干扰(ICI)分量,提出了“基于多径时延分布”选取CP长度进而确定子载波数的方法。计算机仿真验证充分说明了该方法的优越性,所得研究结论对于不同信道环境下的实际OFDM系统参数选择具有指导意义。The ISI and ICI in OFDM system in both cases of CP length longer and shorter than the max delay were analyzed. According to the analyis, a method was proposed that first determine CP length based on delay distribution and then the number of sub-carrier. Through simulation, it is proved that the proposed method is better than the conventional parameter design method in performance. So the conclusion is instructive to parameter selection in designing OFDM systems.

关 键 词：多普勒频移 循环前缀 符号间干扰 子载波间干扰 

分 类 号：TN911.7[电子电信—通信与信息系统]