caa a22 4500 606162623 CHVBK 20210128100640.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10291-014-0384-6 doi (NATIONALLICENCE)springer-10.1007/s10291-014-0384-6 Multipath mitigation and NLOS detection using vector tracking in urban environments [Elektronische Daten] [Li-Ta Hsu, Shau-Shiun Jan, Paul Groves, Nobuaki Kubo] Multipath interference and non-line-of-sight (NLOS) reception are major error sources when using global navigation satellite systems in urban environments. A promising approach to minimize the effect of multipath interference and aid NLOS detection is vector tracking. Therefore, the objective of this research was to assess vector tracking in a dense urban environment to determine its effect on multipath interference and NLOS reception. Here, a vector delay lock loop is implemented using an adaptive extended Kalman filter. This replaces the individual code-tracking loops and navigation filter, but retains conventional carrier frequency tracking. The positioning and tracking performance of the conventional and vector-tracking implementations with and without a strobe correlator are compared using intermediate frequency signals recorded in the Koto-Ku district of urban canyon Tokyo city environment. Both static and dynamic tests were performed. It is shown that vector tracking reduces the root-mean-square positioning error by about 30% compared with an equivalent conventional receiver in urban environments and is capable of detecting long-delay NLOS reception for a GPS receiver without any external aiding . Springer-Verlag Berlin Heidelberg, 2014 Multipath mitigation nationallicence Vector tracking nationallicence Vector delay lock loop (VDLL) nationallicence Non-line-of-sight (NLOS) detection nationallicence Urban canyon nationallicence Strobe correlator nationallicence Hsu Li-Ta Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan aut Jan Shau-Shiun Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan aut Groves Paul Faculty of Engineering, University College London, London, UK aut Kubo Nobuaki Tokyo University of Marine Science and Technology, Tokyo, Japan aut GPS Solutions Springer Berlin Heidelberg 19/2(2015-04-01), 249-262 1080-5370 19:2<249 2015 19 10291 https://doi.org/10.1007/s10291-014-0384-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10291-014-0384-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hsu Li-Ta Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan aut NATIONALLICENCE 700 1- Jan Shau-Shiun Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan aut NATIONALLICENCE 700 1- Groves Paul Faculty of Engineering, University College London, London, UK aut NATIONALLICENCE 700 1- Kubo Nobuaki Tokyo University of Marine Science and Technology, Tokyo, Japan aut NATIONALLICENCE 773 0- GPS Solutions Springer Berlin Heidelberg 19/2(2015-04-01), 249-262 1080-5370 19:2<249 2015 19 10291