NLOS identification and ranging methods in indoor IR-UWB systems

Impulse radio ultra-wideband (IR-UWB) is a promising communication technology. With the advantages of high accuracy, great anti-interference performance, high data rates, and low power consumption, it is drawing more and more attention and is becoming a hot research area for future communication...

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Main Author: Sun, Jingyuan
Other Authors: Law Choi Look
Format: Theses and Dissertations
Language:English
Published: 2016
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Online Access:http://hdl.handle.net/10356/68765
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-687652023-07-04T15:04:09Z NLOS identification and ranging methods in indoor IR-UWB systems Sun, Jingyuan Law Choi Look School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering Impulse radio ultra-wideband (IR-UWB) is a promising communication technology. With the advantages of high accuracy, great anti-interference performance, high data rates, and low power consumption, it is drawing more and more attention and is becoming a hot research area for future communication and position estimation applications. In this dissertation, we mainly focus on the IR-UWB ranging techniques which appears to be the basis o f further UWB positioning. A detailed introduction of UWB signals and widely-adopted UWB channel models are provided. Moreover, as NLOS propagation poses a threat to the accuracy o f ranging estimates, we also address the NLOS identification problem. Parametric-based as well as non-parametric-based method for identification are compared by simulations. It is found that both of them work well, and non-parametric-based method can better simplify the receiver since it merely depends on the statistics o f the received signal without the need to extract the channel statistics. To correctly identify the channel condition will no doubt benefit the range estimation, which is also discussed in the dissertation. Two main ranging techniques, namely Received Signal Strength (RSS) and Time of Arrival(TOA) based algorithms are presented. For the latter, in order to reduce the influence o f noise and multipath effects and improve the ranging accuracy, we also propose an energy-detection-based based TOA which uses a threshold to search for the first direct path. Extensive simulations of RSS and TOA ranging methods are conducted, which implies that in most cases, TOA outperforms RSS as expected. Master of Science (Communications Engineering) 2016-06-01T02:06:40Z 2016-06-01T02:06:40Z 2016 Thesis http://hdl.handle.net/10356/68765 en 85 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering
spellingShingle DRNTU::Engineering::Electrical and electronic engineering
Sun, Jingyuan
NLOS identification and ranging methods in indoor IR-UWB systems
description Impulse radio ultra-wideband (IR-UWB) is a promising communication technology. With the advantages of high accuracy, great anti-interference performance, high data rates, and low power consumption, it is drawing more and more attention and is becoming a hot research area for future communication and position estimation applications. In this dissertation, we mainly focus on the IR-UWB ranging techniques which appears to be the basis o f further UWB positioning. A detailed introduction of UWB signals and widely-adopted UWB channel models are provided. Moreover, as NLOS propagation poses a threat to the accuracy o f ranging estimates, we also address the NLOS identification problem. Parametric-based as well as non-parametric-based method for identification are compared by simulations. It is found that both of them work well, and non-parametric-based method can better simplify the receiver since it merely depends on the statistics o f the received signal without the need to extract the channel statistics. To correctly identify the channel condition will no doubt benefit the range estimation, which is also discussed in the dissertation. Two main ranging techniques, namely Received Signal Strength (RSS) and Time of Arrival(TOA) based algorithms are presented. For the latter, in order to reduce the influence o f noise and multipath effects and improve the ranging accuracy, we also propose an energy-detection-based based TOA which uses a threshold to search for the first direct path. Extensive simulations of RSS and TOA ranging methods are conducted, which implies that in most cases, TOA outperforms RSS as expected.
author2 Law Choi Look
author_facet Law Choi Look
Sun, Jingyuan
format Theses and Dissertations
author Sun, Jingyuan
author_sort Sun, Jingyuan
title NLOS identification and ranging methods in indoor IR-UWB systems
title_short NLOS identification and ranging methods in indoor IR-UWB systems
title_full NLOS identification and ranging methods in indoor IR-UWB systems
title_fullStr NLOS identification and ranging methods in indoor IR-UWB systems
title_full_unstemmed NLOS identification and ranging methods in indoor IR-UWB systems
title_sort nlos identification and ranging methods in indoor ir-uwb systems
publishDate 2016
url http://hdl.handle.net/10356/68765
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