考虑统计特性的OFDM分数维布朗信道模型  

Fractional Brownian channel model considering statistical characters in OFDM

作　　者：曹敦[1] 胡双红[1] 

机构地区：[1]长沙理工大学计算机与通信学院,长沙410076

出　　处：《计算机工程与应用》2011年第28期103-105,共3页Computer Engineering and Applications

基　　金：湖南省自然科学基金(No.11JJ3069)

摘　　要：为了更准确地刻画多径信道,提出了任何采样率下的OFDM信道的分数维布朗模型。模型利用OFDM中具有导频符号的特点,考虑多径衰落具有服从Rice或Rayleigh分布的先验条件,从分形学角度出发分析无线信道的分形特性,建立模型。仿真结果表明,该模型比统计模型更准确地刻画多径信道。In order to characterize a multi-path channel accurately, this paper proposes a fractional Brownian model of OFDM at an arbitrary sampling rate.To establish this model, it uses the characteristics of pilot in OFDM, and considers the prior condition that multi-path fading obeys the Rayleigh or Rice distribution.For model building,it analyzes the fraetal characteristic of wireless channel based on fractal.The simulation results indicate that this model is more accurate than the statis- tical model in characterizing the multi-path channel.

关 键 词：信道模型 正交频分复用 分形 统计 分数维布朗模型 

分 类 号：TN914.4[电子电信—通信与信息系统]