脉冲超宽带系统多径干扰分析  

Multipath interference analysis for impulse ultra-wide band systems

作　　者：宁晓燕[1] 沙学军[1] 林迪[1] 吴宣利[1] 

机构地区：[1]哈尔滨工业大学通信技术研究所,哈尔滨150001

出　　处：《吉林大学学报（工学版）》2009年第6期1672-1676,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金重点项目(60432040);新世纪优秀人才支持计划项目(NECT-04-0332)

摘　　要：基于IEEE802.15.3a多径信道模型分析了跳时超宽带系统在多径信道下的系统性能。首先论证了同一脉冲与其自身多径之间的干扰是不可忽略的,然后建立了多径间干扰估计的数学模型。通过推导给出了计算系统平均信干噪比及误码率的解析表达式,它由信道参数和脉冲波形的自相关函数决定。仿真验证结果表明,我们得到的解析表达式可以较好地逼近系统仿真结果。最后,采用该模型分别对采用高斯二阶导波形和SDP算法设计的优化波形的超宽带系统在多径信道下的误码性能进行了计算,结果表明,在相同信道环境下,优化波形多径间干扰更严重。The performance of time-hopping Ultra-Wideband（UWB） system over IEEE 802.15.3a multipath channel model is analyzed.First,it is proved that the interference between a pulse and its own multipaths cannot be ignored;then a mathematical model is established to evaluate such interference.An exact expression of the average Signal to Interference plus Noise Ratio（SINR） is deduced,which shows that the SINR is determined by the self-correlation function between the channels＇ parameters and the pulse shape.It is shown that the exact expression is in good agreement with the simulation result.System performances using Gaussian pulse and optimal waveform designed with SDP algorithm are analyzed and compared.Results show that the optimal waveform is more sensitive to multipath interference,which results in worse performance with the same channel parameters.

关 键 词：通信技术 超宽带 多径干扰 随机过程 跳时 信干噪比 

分 类 号：TN911.7[电子电信—通信与信息系统] TN929.5[电子电信—信息与通信工程]