摘要
基于电波传播时间的技术是UWB定位最适合的方法。然而,由于室内多径因素的影响,会造成延时估计不准确,从而使得定位也有较大误差。本文研究LOS环境下,脉冲UWB信号在室内多径信道传播的时延特性。研究发现,发射的脉冲信号宽度与室内UWB信道信噪比对定位精度影响很大,并确定了延时较小时的脉冲宽度与信噪比,从而为基于电波传播时间的UWB定位提供了有益参考。
Time -based estimation used with UWB transmission is currently considered as the most popular technique for accurate wireless positioning system. Because of the severe indoor multipath components, this estimation would be inaccurate. In this paper,the characteristics of delay line-of-sight （LOS） channel are investigated. Results show that the period of pulses and the SNR of the channels have a great affect on the precision, which supply useful references to the UWB-based positioning system.
出处
《微计算机信息》
北大核心
2007年第27期140-142,共3页
Control & Automation
基金
上海市科委国际合作项目资助(051107044)"UWB关键技术研究"
上海市重点学科建设项目资助(T0102)"UWB关键技术研究"
关键词
超宽带
定位
附加延时
均方根延时
Ultra-Wide Band, positioning, excess delay, RMS delay
