UWB室内NLOS环境频域衰减特性建模  

Frequency-Domain Attenuation Characteristics Modeling of Ultra-Wideband in Indoor NLOS Environment

作　　者：唐璐丹[1] 

机构地区：[1]桂林电子科技大学信息科技学院,广西桂林541004

出　　处：《光通信研究》2016年第1期63-66,共4页Study on Optical Communications

基　　金：国家自然科学基金资助项目(61371186)

摘　　要：当前IEEE UWB(超宽带)标准中虽然给出了时域统计信道模型,但信道的频域特性并没有得到清晰地反映,而频域特性对于UWB信道容量、测距精度等都有着关键的影响。通过对NLOS(非视距)环境的频率相关路径损耗进行建模,并基于实测数据拟合出频率相关路径损耗指数,获得了NLOS传播环境中的频域衰减变化规律。研究表明,在室内NLOS环境中UWB信道的高频统计衰减特性尤为明显,这与常规UWB信道模型及其频域分析结果有明显不同。该分析方法和结论对于不同NLOS环境中UWB通信容量和定位精度的估计具有较强的指导意义。Although the time-domain statistic channel model is at present given in the IEEE Ultra-Wideband (UWB)standards, the frequency-domain characteristics of channels are not reflected distinctly.However,they have critical impacts on UWB channel capacity,ranging precision,etc.Therefore,the frequency-dependent path loss of UWB Non-Line-of-Sight (NLOS) environment is modeled and frequency-dependent path loss indexes is fitted on the basis of the measured data,the variation law of frequency-domain attenuation in the NLOS transmission environment is obtained.The study results indicate that the high-frequency statistical attenuation characteristics are especially evident in the indoor NLOS environment,which is obviously dif-ferent from the normal analytical results.The analysis method and conclusions in this paper have fairly strong instructive sig-nificance to the evaluation of UWB communication capacity and ranging precision in different NLOS environments.

关 键 词：超宽带 实测数据 频率特性 

分 类 号：TN929.5[电子电信—通信与信息系统]