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应用科学学报

• 论文 • 上一篇    

IR-UWB测距在多径信道下的时延性能分析

蒋婷婷，郑国莘，郑瑞杰   

  1. 上海大学 通信与信息工程学院，上海 200072
  • 收稿日期:2006-08-09 修回日期:2006-12-04 出版日期:2007-05-31 发布日期:2007-05-31

Delay Analysis of IR-UWB-based Distance Measuring in Multipath Channel

JIANG Ting-ting, ZHENG Guo-xin, ZHENG Rui-jie   

  1. School of Communication and Information Engineering, Shanghai University, 200072, China
  • Received:2006-08-09 Revised:2006-12-04 Online:2007-05-31 Published:2007-05-31

被引次数

22

摘要： TOA(Time of Arrival)估计是目前基于UWB的室内精确定位最常用的方法。然而由于室内多径因素的影响，TOA估计会不准确，使得测距也有较大误差。本文研究LOS环境下，IR-UWB信号在室内多径信道中的时延特性。研究发现，发射的脉冲信号宽度与室内UWB信道信噪比对测距精度影响很大，从而为基于TOA的IR-UWB测距提供了有益参考。

关键词: 超宽带, 测距, 附加延时, 均方根延时

Abstract: Time of arrival (TOA) estimation used with UWB transmission is currently considered as the most popular technique for accurate wireless distance measurement system. Because of the severe indoor multipath components, this estimation may be inaccurate. In this paper, characteristics of delay based on IR-UWB in line-of-sight (LOS) channel are investigated. The results show that the pulse period and SNR of the channels have a considerable influence on precision, which provides useful references to the distance measurement based on IR-UWB.

Key words: ultra-wide band, distance measurement, excess delay, RMS delay