Title :
Large error performance of UWB ranging in multipath and multiuser environments
Author :
Lee, Joon-Yong ; Yoo, Sungyul
Author_Institution :
Sch. of Comput. Sci. & Electr. Eng., Handong Univ., Pohang, South Korea
fDate :
6/1/2006 12:00:00 AM
Abstract :
Accurate detection of direct path signal is essential for ranging to the full capabilities of ultra-wideband (UWB) signals. However, the possibility of a large error can be a challenging problem for accurate ranging and positioning. Three different kinds of potential errors encountered in correlation-based time-of-arrival (TOA) estimation are introduced, and an approximate analysis of them is posed. Upper and lower bounding technique is applied to the variance of one of them, namely an early false alarm error. Probability of occurrence of the other two kinds of error is found using the channel statistics, and the mean square of them is evaluated by simulation method. Discussion of the effect of multiple-access schemes on the accuracy of UWB TOA estimation is initiated.
Keywords :
correlation methods; delay estimation; multipath channels; multiuser channels; time-of-arrival estimation; ultra wideband communication; TOA estimation; UWB ranging; UWB signals; approximate analysis; channel statistics; correlation-based time-of-arrival estimation; delay estimation; detection accuracy; direct path signal; large error performance; multipath environment; multiple-access schemes; multiuser environment; occurrence probability; ultra-wideband signals; AWGN; Additive white noise; Error analysis; Estimation error; Multiaccess communication; Multipath channels; Multiuser channels; Probability; Time of arrival estimation; Ultra wideband technology; Delay estimation; multipath channel; multiuser channel; ranging; ultra-wideband (UWB);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2006.871997
