基于NN准则的IR-UWB合成脉冲多径信道估计方法  

Composite pulse multipath channel estimation method based on NN rule for IR-UWB

作　　者：刘志勇[1] 张钦宇[1] 张乃通[1,2] 

机构地区：[1]哈尔滨工业大学深圳研究生院,广东深圳518055 [2]哈尔滨工业大学通信技术研究所,黑龙江哈尔滨150001

出　　处：《通信学报》2010年第5期10-15,共6页Journal on Communications

基　　金：国家自然科学基金青年基金资助项目(60702034)~~

摘　　要：针对脉冲超宽带(IR-UWB,impulse radio-ultra wideband)系统现有合成脉冲多径信道估计方法不能解决由ISI带来的脉冲波形失真影响的问题,提出一种基于最近邻居(NN,nearest neighbor)准则的合成脉冲多径信道估计方法。估计出合成脉冲多径信道而后用作相关检测器的模板,通过仿真比较了所提方法与传统平均方法得到的模板对信号的检测性能。结果表明,不存在ISI时,NN估计方法获得和平均方法相似的误码率(BER)性能,存在ISI时,NN估计方法获得的BER性能优于平均方法。Aimed at the problem that the current composite pulse multipath channel estimation methods for impulse radio-ultra wideband（IR-UWB） system can＇t solve the effect of pulse waveform distortion caused by ISI,a composite pulse multipath channel estimation method based on nearest neighbor（NN） rule was proposed.This estimated composite pulse multipath channel was subsequently used as a template in a correlator-based detector,and then the detection performance of template obtained by proposed method and conventional averaged method was compared in simulation.Simulation results show that when there is no ISI,the NN estimation method achieves similar BER performance as average method,when ISI is caused by overlap of symbols,the BER performance of NN estimation significantly outperforms that of the average method.

关 键 词：脉冲超宽带 合成脉冲多径信道估计 最近邻居准则 检测 

分 类 号：TN911[电子电信—通信与信息系统]