Ranging With Ultrawide Bandwidth Signals in Multipath Environments

被引:733
作者
Dardari, Davide [1 ]
Conti, Andrea [2 ,3 ]
Ferner, Ulric [4 ]
Giorgetti, Andrea [1 ]
Win, Moe Z. [4 ]
机构
[1] Univ Bologna Cesena, DEIS, WiLAB, I-47023 Cesena, FC, Italy
[2] Univ Ferrara, ENDIF, I-44100 Ferrara, Italy
[3] Univ Bologna, WiLAB, I-40136 Bologna, Italy
[4] MIT, Informat & Decis Syst Lab, Cambridge, MA 02139 USA
基金
美国国家科学基金会;
关键词
interference; localization; multipath channel; ranging; time-of-arrival; ultrawide bandwidth; TIME-DELAY ESTIMATION; LOWER BOUNDS; TOA ESTIMATION; FUNDAMENTAL LIMITATIONS; ERROR PERFORMANCE; IMPULSE RADIO; UWB; LOCALIZATION; ALGORITHM; CHANNEL;
D O I
10.1109/JPROC.2008.2008846
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];
摘要
Over the coming decades, high-definition situationally-aware networks have the potential to create revolutionary applications in the social, scientific, commercial, and military sectors. ultrawide bandwidth (UWB) technology is a viable candidate for enabling accurate localization capabilities through time-of-arrival (TOA)-based ranging techniques. These techniques exploit the fine delay resolution property of UWB signals by estimating the TOA of the first signal path. Exploiting the full capabilities of UWB TOA estimation can be challenging, especially when operating in harsh propagation environments, since the direct path may not exist or it may not be the strongest. In this paper, we first give an overview of ranging techniques together with the primary sources of TOA error (including propagation effects, clock drift, and interference). we then describe fundamental TOA bounds (such as the Cramer-Rao bound and the tighter Ziv-Zakai bound) in both ideal and multipath environments. These bounds serve as useful benchmarks in assessing the performance of TOA estimation techniques. We also explore practical low-complexity TOA estimation techniques and analyze their performance in the presence of multipath and interference using IEEE 802.15.4a channel models as well as experimental data measured in indoor residential environments.
引用
收藏
页码:404 / 426
页数:23
相关论文
共 153 条
[1]
Alavi B, 2006, IEEE COMMUN LETT, V10, P275, DOI 10.1109/LCOMM.2006.04026
[2]
Alavi B, 2006, IEEE WCNC, P884
[3]
[Anonymous], 2002, Wireless Communications: Principles and Practice
[4]
[Anonymous], P IEEE INT C ULTR IC
[5]
[Anonymous], P IEEE SARN S PRINC
[6]
[Anonymous], P IEEE INT C ULTR WE
[7]
[Anonymous], P IEEE SEM VEH TECHN
[8]
[Anonymous], P IEEE S NEW FRONT D
[9]
Anouar H., 2006, P INT S COMM CONTR S
[10]
Extended Ziv-Zakai lower bound for vector parameter estimation [J].
Bell, KL ;
Steinberg, Y ;
Ephraim, Y ;
VanTrees, HL .
IEEE TRANSACTIONS ON INFORMATION THEORY, 1997, 43 (02) :624-637