一种基于自适应算法的超宽带系统盲均衡技术  

Adaptive blind equalization for ultra wideband system

作　　者：师小琳[1] 

机构地区：[1]西安邮电学院电子与信息工程系,西安710121

出　　处：《计算机应用》2009年第5期1238-1240,共3页journal of Computer Applications

基　　金：国家自然科学基金资助项目(7047105760873196);陕西省教育厅自然科学基金资助项目(03Jk065)

摘　　要：提出了一种适用于直接序列超宽带(DS-UWB)和跳时超宽带(TH-UWB)系统中的自适应盲均衡技术。该方法利用可变遗忘因子的自适应算法,快速有效地跟踪超宽带(UWB)时变信道的变化,从而有效地补偿由于信道特性引起的干扰。在接收过程中,不需要训练序列就可以修正均衡器系数,从而获得发送信号的估计量。此外,该算法收敛快,稳定性好。仿真结果表明,该方法可以有效地跟踪UWB衰落信道的变化,并获得较小的误码率。A new adaptive blind equalization technology was proposed for Direct Sequence-Ultra WideBand （DS-UWB） and Time-Hopping-Ultra WideBand （TH-UWB） wireless communication systems. This method can effectively track the variation of Ultra WideBand （UWB） channels by using the variable forgetting factor to the adaptive algorithm and thus can compensate the interference due to the properties of channels. When receiving the signals, it can adjust the coefficients of equalizers without using the training sequence and then obtain the estimation of the sent signals. Furthermore, this method has relatively rapid convergence rate and good stability. Simulation results show that the proposed method has better performance in tracking UWB fading channels and it also help obtain lower Bit Error Rate （ BER）.

关 键 词：超宽带系统 盲均衡 自适应算法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]