A NLOS mitigation method for CDMA2000 mobile location

In TDOA cellular mobile location, Non-Line-of-Sight (NLOS) propagation of radio waves brings about the larger errors of TOA/TDOA parameter measurements, thus resulting in location accuracy decreasing seriously. On the basis of TDOA errors analysis and NLOS characteristics investigation, a NLOS mitig...

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Bibliographic Details
Published in2010 2nd IEEE InternationalConference on Network Infrastructure and Digital Content pp. 668 - 672
Main Authors Weiguo Guan, Zhongliang Deng, Yanpei Yu, Yuetao Ge
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2010
Subjects
Accuracy
Estimation
Kaiman filter
Kalman filters
Measurement uncertainty
Mobile communication
mobile location
NLOS error
TDOA reconstruction
Urban areas
Wireless communication
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Summary:In TDOA cellular mobile location, Non-Line-of-Sight (NLOS) propagation of radio waves brings about the larger errors of TOA/TDOA parameter measurements, thus resulting in location accuracy decreasing seriously. On the basis of TDOA errors analysis and NLOS characteristics investigation, a NLOS mitigation algorithm is proposed in this paper to realize the TDOA smoothing and LOS reconstruction by Kaiman filter in NLOS propagation environment, which effectively inhibits NLOS error of mobile location, so that positioning errors are reduced greatly. Simulation results show that the proposed algorithm can significantly improve the positioning accuracy and performance of TDOA mobile location under NLOS conditions. Combining with the WLS location resolving algorithm, the proposed algorithm can be well applied to mobile location of CDMA2000 cellular networks.
ISBN:9781424468515
1424468515
ISSN:2374-0272
DOI:10.1109/ICNIDC.2010.5657865