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| Presentation | 2011-03-04 10:20 An NLOS Mitigation Algorithm with Weight Factor for TDOA Distance Measurement Mingmei Li, Naoki Imai, Kiyohito Yoshihara (KDDI lab)  IN2010-198 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Non-line-of-sight (NLOS) identification and mitigation carry significant importance in location systems. Previous research has mainly addressed the problems by using a biased kalman filter. However, through some numerical calculations, we found that the NLOS distance errors are only compensated when the difference between the predicted and measured distance is positive. With the assumption that the distribution of the user's measured distance information can be obtained from the line-of-sight (LOS) condition, this paper proposes a weight distance estimation algorithm in a kalman filter. The proposed algorithm detects a NLOS measured distance using Chauvenet’s criterion first, and then add a weight factor to the detected NLOS measured distance. The determination of the weight factor is to compare the Mahalanobis distance between the NLOS measured distance and the distribution of LOS measurement distances. We evaluated the efficiency of the proposed algorithm. The simulation results show that the proposed algorithm reduces the location errors that are affected by NLOS in the same length of step size, compared with the existing algorithm. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | non-line-of-sight (NLOS) / Kalman filter / weight factor / Chauvenet’s criterion / Mahalanobis distance / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 110, no. 449, IN2010-198, pp. 325-330, March 2011. | |
| Paper # | IN2010-198 | |
| Date of Issue | 2011-02-24 (IN) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | IN2010-198 |
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| Conference Information | |
| Committee | IN NS |
| Conference Date | 2011-03-03 - 2011-03-04 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Okinawa Convention Center |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | General, NS+IN workshop (March 3-4) |
| Paper Information | |
| Registration To | IN |
| Conference Code | 2011-03-IN-NS |
| Language | English (Japanese title is available) |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An NLOS Mitigation Algorithm with Weight Factor for TDOA Distance Measurement |
| Sub Title (in English) | |
| Keyword(1) | non-line-of-sight (NLOS) |
| Keyword(2) | Kalman filter |
| Keyword(3) | weight factor |
| Keyword(4) | Chauvenet’s criterion |
| Keyword(5) | Mahalanobis distance |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Mingmei Li |
| 1st Author's Affiliation | KDDI R&D Laboratories Inc. (KDDI lab) |
| 2nd Author's Name | Naoki Imai |
| 2nd Author's Affiliation | KDDI R&D Laboratories Inc. (KDDI lab) |
| 3rd Author's Name | Kiyohito Yoshihara |
| 3rd Author's Affiliation | KDDI R&D Laboratories Inc. (KDDI lab) |
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| Speaker | Author-1 |
| Date Time | 2011-03-04 10:20:00 |
| Presentation Time | 20 minutes |
| Registration for | IN |
| Paper # | IN2010-198 |
| Volume (vol) | vol.110 |
| Number (no) | no.449 |
| Page | pp.325-330 |
| #Pages | 6 |
| Date of Issue | 2011-02-24 (IN) |
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