UWB Localization for NLOS under Indoor Multipath Channel: Scheme and TOA Estimation

Ke-Chu YI
Yong-Chao WANG

IEICE TRANSACTIONS on Communications   Vol.E91-B    No.10    pp.3391-3394
Publication Date: 2008/10/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.10.3391
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
UWB,  NLOS localization scheme,  TOA estimation,  multipath channels,  

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This letter proposes a UWB signaling localization scheme for indoor multipath channel. It demonstrates that the proposed method does not require LOS path (LP) and is suitable for severe non line-of-sight (NLOS) condition. A low-complexity TOA estimation algorithm, the strongest path (SP) detection by convolution, is designed, which is easier to implement than the LP detection since it dispenses with the process of threshold setting. Experiments under NLOS channels in IEEE.802.15.4a are conducted and the localization influences due to the algorithm parameters are discussed. The results prove the feasibility of the proposed localization scheme under the indoor multipath NLOS environment.