Title :
Improved Lower Bounds on Time-of-Arrival Estimation Error in Realistic UWB Channels
Author :
Dardari, Davide ; Chong, Chia Chin ; Win, Moe Z.
Author_Institution :
WiLAB, Bologna Univ., Cesena
Abstract :
This paper investigates lower bounds on time-of-arrival (ToA) estimation error for ultrawide bandwidth ranging systems operating in realistic multipath environments. Based on the Ziv-Zakai lower bound, we derive a lower bound for the ToA estimation error using both the IEEE 802.15.4a channel models and experimentally measured data. It is shown that for practical signal-to-noise values the classical Cramer-Rao lower bound is too optimistic when operating in dense multipath environments
Keywords :
channel estimation; multipath channels; time-of-arrival estimation; ultra wideband communication; IEEE 802.15.4a channel model; ToA estimation error; Ziv-Zakai lower bound; realistic UWB multipath channel; time-of-arrival estimation; ultrawide bandwidth ranging system; Amplitude estimation; Bandwidth; Channel estimation; Delay estimation; Estimation error; Maximum likelihood estimation; Mean square error methods; Pulse shaping methods; Time of arrival estimation; USA Councils; Ranging; UWB; Ziv-Zakai lower bound; time-of-arrival estimation;
Conference_Titel :
Ultra-Wideband, The 2006 IEEE 2006 International Conference on
Conference_Location :
Waltham, MA
Print_ISBN :
1-4244-0101-1
Electronic_ISBN :
1-4244-0102-X
DOI :
10.1109/ICU.2006.281605
