Title :
A UWB localization scheme for LOS and NLOS environments using orthogonal codes
Author :
Cao, Wei ; Zhang, Qi ; Nallanathan, A.
Author_Institution :
Alcatel Shanghai Bell, Shanghai, China
Abstract :
A time difference of arrival (TDOA) impulse radio localization scheme based on orthogonal codes is proposed for the positioning systems with multiple mobile nodes. In the proposed scheme, pre-deployed anchors broadcast their unique IDs synchronously and periodically. A two-step localization procedure is carried out by the mobile node. Three anchors with the strongest signal energy are selected and the TDOA of these three signals is measured for location estimation. The orthogonal codes are used to completely cancel the interference between signals from multiple anchors. Simulation results are presented to show the accuracy of the proposed localization scheme in both LOS and NLOS environments. Furthermore, the system performance under different parameter settings are discussed in detail.
Keywords :
interference suppression; mobile radio; orthogonal codes; radionavigation; time-of-arrival estimation; ultra wideband communication; LOS environments; NLOS environments; TDOA impulse radio localization scheme; UWB localization scheme; interference cancellation; location estimation; multiple mobile node; orthogonal code; positioning system; pre-deployed anchor; signal energy; time difference of arrival impulse radio localization scheme; two-step localization procedure; ultra wideband impulse signal; Accuracy; Ad hoc networks; Estimation; Interference; Mobile communication; Wireless communication; Wireless sensor networks;
Conference_Titel :
Ultra-Wideband (ICUWB), 2011 IEEE International Conference on
Conference_Location :
Bologna
Print_ISBN :
978-1-4577-1763-5
Electronic_ISBN :
2162-6588
DOI :
10.1109/ICUWB.2011.6058930
