Indoor positioning using UWB-IR signals in the presence of dense multipath with path overlapping
This paper presents a method for positioning using ultra-wideband impulse radio (UWB-IR) signals that is robust in indoor environments characterized by dense multipath channel with path overlapping. Path overlapping effects arising from multipath in dense cluttered environments decrease the direct p...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/97083 http://hdl.handle.net/10220/11492 |
| _version_ | 1811680942844018688 |
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| author | Luo, Yanjia Law, Choi Look |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Luo, Yanjia Law, Choi Look |
| author_sort | Luo, Yanjia |
| collection | NTU |
| description | This paper presents a method for positioning using ultra-wideband impulse radio (UWB-IR) signals that is robust in indoor environments characterized by dense multipath channel with path overlapping. Path overlapping effects arising from multipath in dense cluttered environments decrease the direct path resolution in time domain, and hence induce time-of-arrival (TOA) and angle-of-arrival (AOA) based positioning inaccuracy. To mitigate this problem, system design that is capable of resolving the closely-spaced multipath at low cost is of value. Our method yields the least-squares estimation of joint TOA and AOA with low computational cost. It is based on the spectral observation of beam forming, in which the path overlapping effect is mitigated using multipath-aided acquisition. The computational cost is reduced using in-band power spectrum and accurate initial estimations. The performance is verified both in IEEE 802.15.4a CM3 channel model and in a real environment. Simulation results in CM3 channel model show that the TOA and AOA estimation improvements on average are 2.4cm and 13.1° in the dense multipath scenario. Measurement in an indoor open hall environment shows that the AOA error decreases from 10.6° to 7.2°, and the TOA error decreases from 2.1cm to 1.9cm when the path overlapping effects are mitigated in the range of 21m. |
| first_indexed | 2024-10-01T03:33:04Z |
| format | Journal Article |
| id | ntu-10356/97083 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:33:04Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/970832020-03-07T14:02:45Z Indoor positioning using UWB-IR signals in the presence of dense multipath with path overlapping Luo, Yanjia Law, Choi Look School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering This paper presents a method for positioning using ultra-wideband impulse radio (UWB-IR) signals that is robust in indoor environments characterized by dense multipath channel with path overlapping. Path overlapping effects arising from multipath in dense cluttered environments decrease the direct path resolution in time domain, and hence induce time-of-arrival (TOA) and angle-of-arrival (AOA) based positioning inaccuracy. To mitigate this problem, system design that is capable of resolving the closely-spaced multipath at low cost is of value. Our method yields the least-squares estimation of joint TOA and AOA with low computational cost. It is based on the spectral observation of beam forming, in which the path overlapping effect is mitigated using multipath-aided acquisition. The computational cost is reduced using in-band power spectrum and accurate initial estimations. The performance is verified both in IEEE 802.15.4a CM3 channel model and in a real environment. Simulation results in CM3 channel model show that the TOA and AOA estimation improvements on average are 2.4cm and 13.1° in the dense multipath scenario. Measurement in an indoor open hall environment shows that the AOA error decreases from 10.6° to 7.2°, and the TOA error decreases from 2.1cm to 1.9cm when the path overlapping effects are mitigated in the range of 21m. 2013-07-16T02:00:32Z 2019-12-06T19:38:49Z 2013-07-16T02:00:32Z 2019-12-06T19:38:49Z 2012 2012 Journal Article Luo, Y., & Law, C. L. (2012). Indoor Positioning Using UWB-IR Signals in the Presence of Dense Multipath with Path Overlapping. IEEE Transactions on Wireless Communications, 11(10), 3734-3743. 1536-1276 https://hdl.handle.net/10356/97083 http://hdl.handle.net/10220/11492 10.1109/TWC.2012.081612.120045 en IEEE transactions on wireless communications © 2012 IEEE. |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Luo, Yanjia Law, Choi Look Indoor positioning using UWB-IR signals in the presence of dense multipath with path overlapping |
| title | Indoor positioning using UWB-IR signals in the presence of dense multipath with path overlapping |
| title_full | Indoor positioning using UWB-IR signals in the presence of dense multipath with path overlapping |
| title_fullStr | Indoor positioning using UWB-IR signals in the presence of dense multipath with path overlapping |
| title_full_unstemmed | Indoor positioning using UWB-IR signals in the presence of dense multipath with path overlapping |
| title_short | Indoor positioning using UWB-IR signals in the presence of dense multipath with path overlapping |
| title_sort | indoor positioning using uwb ir signals in the presence of dense multipath with path overlapping |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/97083 http://hdl.handle.net/10220/11492 |
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