Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577279
S. Morosi, E. D. Re, A. Martinelli
In this paper, a peer-to-peer cooperative algorithm with fine/coarse time acquisition and positioning has been implemented on GPS software-defined receivers. The benefits of the aiding information are considered. Moreover, experimental results evaluate the computational and accuracy performance in the acquisition and positioning processes, respectively.
{"title":"P2P cooperative GPS positioning with fine/coarse time assistance","authors":"S. Morosi, E. D. Re, A. Martinelli","doi":"10.1109/ICL-GNSS.2013.6577279","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577279","url":null,"abstract":"In this paper, a peer-to-peer cooperative algorithm with fine/coarse time acquisition and positioning has been implemented on GPS software-defined receivers. The benefits of the aiding information are considered. Moreover, experimental results evaluate the computational and accuracy performance in the acquisition and positioning processes, respectively.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117268107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577268
Diego M. Franco-Patino, G. Seco-Granados, F. Dovis
In GNSS, one of the most important degradations in the signal is caused by the multipath effect, which introduces a bias that impacts the user's position accuracy. The multipath components are attenuated and delayed versions of the transmitted signal, and they are produced by reflections on different obstacles or objects. The aim of this paper is to analyze and compare two multipath detection techniques, namely the Slope Asymmetry Metric (SAM) and the C/N0 evolution, as possible tools to check the quality of the signal in different scenarios. It is shown that while both techniques can provide information about the presence of multipath, the SAM is in general more sensitivity to this effect.
{"title":"Signal quality checks for multipath detection in GNSS","authors":"Diego M. Franco-Patino, G. Seco-Granados, F. Dovis","doi":"10.1109/ICL-GNSS.2013.6577268","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577268","url":null,"abstract":"In GNSS, one of the most important degradations in the signal is caused by the multipath effect, which introduces a bias that impacts the user's position accuracy. The multipath components are attenuated and delayed versions of the transmitted signal, and they are produced by reflections on different obstacles or objects. The aim of this paper is to analyze and compare two multipath detection techniques, namely the Slope Asymmetry Metric (SAM) and the C/N0 evolution, as possible tools to check the quality of the signal in different scenarios. It is shown that while both techniques can provide information about the presence of multipath, the SAM is in general more sensitivity to this effect.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131218245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577265
D. Borio, C. O'Driscoll, J. Fortuny-Guasch
Global Navigation Satellite Systems (GNSSs) are vulnerable to several threats including jamming and spoofing. Jamming is the deliberate transmission of powerful Radio-Frequency (RF) signals which can easily overpower the much weaker GNSS components disturbing and, in some cases, denying GNSS operations. In recent years an increasing number of cheap, though illegal, jammers have become commercially available. In this paper, the impact of these jammers on Global Positioning System (GPS) and Galileo L1/E1 signal reception is investigated. It is shown that the signals of each system are affected in similar ways and this is due to the wide-band nature of the jamming signals. Narrow-band receivers are less impacted by jamming since they are able to filter out a greater portion of the interfering signal. Interestingly, the presence of a pure pilot channel in the Galileo E1 modulation allows receivers to use a pure Phase Lock Loop (PLL) which in turn allows signal reception in the presence of stronger jamming signals with respect to the GPS L1 C/A case.
{"title":"Jammer impact on Galileo and GPS receivers","authors":"D. Borio, C. O'Driscoll, J. Fortuny-Guasch","doi":"10.1109/ICL-GNSS.2013.6577265","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577265","url":null,"abstract":"Global Navigation Satellite Systems (GNSSs) are vulnerable to several threats including jamming and spoofing. Jamming is the deliberate transmission of powerful Radio-Frequency (RF) signals which can easily overpower the much weaker GNSS components disturbing and, in some cases, denying GNSS operations. In recent years an increasing number of cheap, though illegal, jammers have become commercially available. In this paper, the impact of these jammers on Global Positioning System (GPS) and Galileo L1/E1 signal reception is investigated. It is shown that the signals of each system are affected in similar ways and this is due to the wide-band nature of the jamming signals. Narrow-band receivers are less impacted by jamming since they are able to filter out a greater portion of the interfering signal. Interestingly, the presence of a pure pilot channel in the Galileo E1 modulation allows receivers to use a pure Phase Lock Loop (PLL) which in turn allows signal reception in the presence of stronger jamming signals with respect to the GPS L1 C/A case.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114393434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577254
F. Pisoni, P. Mattos
The recent release, in December 2012, of the complete BeiDou B1I Interface Control Document has boosted new interest and R&D activities in the field. For a manufacturer of GNSS semiconductor devices, the first and logical step in the roadmap toward a full blown BeiDou receiver is the reuse of existing and proven silicon; the new product can blossom and reach the market more quickly, with good overall performance, though not yet optimized in every single aspect. Following this approach, the paper describes a BeiDou receiver implementation, based on the STA8088 “Teseo-II” consumer chip, which was originally designed for GPS, Galileo and GLONASS. Several technical solutions adopted in the receiver are disclosed, including aspects of the RF path, signal processing and higher level software algorithms like GEO velocity computation and ionosphere models. The main difficulty encountered was the generation of the B1I ranging codes, which was accomplished, with some performance trade-offs, by reusing the on-chip Galileo programmable code memory. The final result is a compact, consumer grade BeiDou hardware receiver, suitable for navigation and timing applications. Static positioning plots from real data, collected at a roof antenna are also reported.
{"title":"A BeiDou hardware receiver based on the STA8088 chipset","authors":"F. Pisoni, P. Mattos","doi":"10.1109/ICL-GNSS.2013.6577254","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577254","url":null,"abstract":"The recent release, in December 2012, of the complete BeiDou B1I Interface Control Document has boosted new interest and R&D activities in the field. For a manufacturer of GNSS semiconductor devices, the first and logical step in the roadmap toward a full blown BeiDou receiver is the reuse of existing and proven silicon; the new product can blossom and reach the market more quickly, with good overall performance, though not yet optimized in every single aspect. Following this approach, the paper describes a BeiDou receiver implementation, based on the STA8088 “Teseo-II” consumer chip, which was originally designed for GPS, Galileo and GLONASS. Several technical solutions adopted in the receiver are disclosed, including aspects of the RF path, signal processing and higher level software algorithms like GEO velocity computation and ionosphere models. The main difficulty encountered was the generation of the B1I ranging codes, which was accomplished, with some performance trade-offs, by reusing the on-chip Galileo programmable code memory. The final result is a compact, consumer grade BeiDou hardware receiver, suitable for navigation and timing applications. Static positioning plots from real data, collected at a roof antenna are also reported.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134549638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577251
A. Cernigliaro, Stefano Valloreia, L. Galleani, P. Tavella
Atomic clocks are fundamental elements of a Global Navigation Satellite System (GNSS). Currently, several GNSSs are operational and the different clock technologies employed onboard their satellites benefit from the technological improvements achieved during the last decades. To ensure the timing capabilities needed for correct positioning, the analysis of GNSS clock performances is essential. We have recently started a performance analysis for GPS and GLONASS clocks, by using the satellite clock estimates produced by the Information-Analytical Centre (IAC) of the Russian Federal Space Agency. In this paper we discuss a few preliminary results of this analysis. We analyze the time deviation, frequency deviation, and frequency stability of the Cesium and Rubidium clocks onboard three GPS and GLONASS satellites. The obtained results highlight the presence of two common space clock anomalies, namely, deterministic oscillations and frequency jumps. Our final goal is to build a detailed statistics of the clock anomalies for all GNSSs.
{"title":"GNSS space clocks: Performance analysis","authors":"A. Cernigliaro, Stefano Valloreia, L. Galleani, P. Tavella","doi":"10.1109/ICL-GNSS.2013.6577251","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577251","url":null,"abstract":"Atomic clocks are fundamental elements of a Global Navigation Satellite System (GNSS). Currently, several GNSSs are operational and the different clock technologies employed onboard their satellites benefit from the technological improvements achieved during the last decades. To ensure the timing capabilities needed for correct positioning, the analysis of GNSS clock performances is essential. We have recently started a performance analysis for GPS and GLONASS clocks, by using the satellite clock estimates produced by the Information-Analytical Centre (IAC) of the Russian Federal Space Agency. In this paper we discuss a few preliminary results of this analysis. We analyze the time deviation, frequency deviation, and frequency stability of the Cesium and Rubidium clocks onboard three GPS and GLONASS satellites. The obtained results highlight the presence of two common space clock anomalies, namely, deterministic oscillations and frequency jumps. Our final goal is to build a detailed statistics of the clock anomalies for all GNSSs.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128400611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577257
Zhoubing Xiong, F. Sottile, M. Spirito, R. Garello
Dense urban areas are particularly challenging environments for global navigation satellite systems (GNSS) because the satellite visibility is heavily reduced due to the presence of the so called urban canyons, composed of a series of tall buildings and narrow streets. In order to improve GNSS performance in these environments, hybrid (GNSS/terrestrial) and cooperative positioning algorithms that combine pseudorange measurements from visible satellites and terrestrial range measurements from neighboring terrestrial receivers have been recently proposed in the literature. Mainly, these algorithms have been tested in static or pedestrian mobility scenarios. This paper, first introduces a robust procedure that selects the most reliable neighbors for cooperation and then analyzes the performance of the optimized hybrid and cooperative positioning algorithms in a typical urban canyon scenario for vehicular navigations. Simulation results demonstrate that the positioning algorithms can accurately track the movement of vehicles in urban canyons even without fixed terrestrial infrastructure. Moreover, an accurate complexity analysis of the different hybrid algorithms is presented to understand their suitability for a real implementation.
{"title":"Analysis of hybrid and cooperative positioning algorithms in urban canyon scenarios","authors":"Zhoubing Xiong, F. Sottile, M. Spirito, R. Garello","doi":"10.1109/ICL-GNSS.2013.6577257","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577257","url":null,"abstract":"Dense urban areas are particularly challenging environments for global navigation satellite systems (GNSS) because the satellite visibility is heavily reduced due to the presence of the so called urban canyons, composed of a series of tall buildings and narrow streets. In order to improve GNSS performance in these environments, hybrid (GNSS/terrestrial) and cooperative positioning algorithms that combine pseudorange measurements from visible satellites and terrestrial range measurements from neighboring terrestrial receivers have been recently proposed in the literature. Mainly, these algorithms have been tested in static or pedestrian mobility scenarios. This paper, first introduces a robust procedure that selects the most reliable neighbors for cooperation and then analyzes the performance of the optimized hybrid and cooperative positioning algorithms in a typical urban canyon scenario for vehicular navigations. Simulation results demonstrate that the positioning algorithms can accurately track the movement of vehicles in urban canyons even without fixed terrestrial infrastructure. Moreover, an accurate complexity analysis of the different hybrid algorithms is presented to understand their suitability for a real implementation.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128660134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577272
S. Sand, Siwei Zhang, Maximilian Mühlegg, Guillermo P. Falconi, Chen Zhu, T. Krüger, S. Nowak
We propose autonomous robotic swarm exploration to search for extra-terrestrial life in the Valles Marineris canyon system on Mars. The swarm consists of unmanned ground vehicles (UGVs) and unmanned aerial vehicles (UAVs). Key technologies are robust flight and swarm control algorithms as well as infrastructure-less swarm navigation. The swarm navigation uses inertial navigation, laser scanners, cameras, and relative radio positioning systems. The later one employs hybrid time-division multiple access (TDMA) - frequency division multiple access (FDMA) and interleaved round-trip delay ranging measurements. For TDMA, an autonomous distributed slot synchronization algorithm is presented.We present a swarm scenario with initially ten elements, adding one element after 6.25 s, until 25 elements are active. The synchronization algorithm is stable transmitting only five out of eight possible symbols per TDMA slot for 25 swarm elements, but is only stable for 17 swarm elements transmitting all eight symbols per slot. Nevertheless, a distributed swarm navigation particle filter achieves an accuracy of 1m or better for 21 swarm elements in the later case.
{"title":"Swarm exploration and navigation on mars","authors":"S. Sand, Siwei Zhang, Maximilian Mühlegg, Guillermo P. Falconi, Chen Zhu, T. Krüger, S. Nowak","doi":"10.1109/ICL-GNSS.2013.6577272","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577272","url":null,"abstract":"We propose autonomous robotic swarm exploration to search for extra-terrestrial life in the Valles Marineris canyon system on Mars. The swarm consists of unmanned ground vehicles (UGVs) and unmanned aerial vehicles (UAVs). Key technologies are robust flight and swarm control algorithms as well as infrastructure-less swarm navigation. The swarm navigation uses inertial navigation, laser scanners, cameras, and relative radio positioning systems. The later one employs hybrid time-division multiple access (TDMA) - frequency division multiple access (FDMA) and interleaved round-trip delay ranging measurements. For TDMA, an autonomous distributed slot synchronization algorithm is presented.We present a swarm scenario with initially ten elements, adding one element after 6.25 s, until 25 elements are active. The synchronization algorithm is stable transmitting only five out of eight possible symbols per TDMA slot for 25 swarm elements, but is only stable for 17 swarm elements transmitting all eight symbols per slot. Nevertheless, a distributed swarm navigation particle filter achieves an accuracy of 1m or better for 21 swarm elements in the later case.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130557145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577277
Jinnan Liu, Shulan Feng
We study the reference signal time difference (RSTD) performance and implementation of scalable positioning reference signal (PRS) bandwidth in long term evolution (LTE). Limited number of reference signal symbols for performing RSTD measurements reduces the quality of the timing and position estimations. To overcome this limitation, we propose to share the PRS transmit port with one of the cell-specific reference signals (CRS) transmit ports, named C-PRS scheme. To get over 10% performance enhancements for small bandwidth cases, we pay an extra complexity from 3 CRS symbols. In order to reduce the overhead of large PRS bandwidth subframes, PRSs keep only in odd slots and data can be transmitted in even slots. The C-PRS scheme may transmit extra 3~4 symbols per one PRS subframe with the negligible losses of performance in the large PRS bandwidth cases. We also discuss the implementation of RSTD measurements which compute the cross-correlation of scalable bandwidth signals by dynamic or fixed FFT/IFFT size algorithms. The fixed FFT/IFFT size algorithm can balance the computation efficiency and the size of local memories.
{"title":"Enhanced RSTD for scalable bandwidth of OTDOA positioning in 3GPP LTE","authors":"Jinnan Liu, Shulan Feng","doi":"10.1109/ICL-GNSS.2013.6577277","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577277","url":null,"abstract":"We study the reference signal time difference (RSTD) performance and implementation of scalable positioning reference signal (PRS) bandwidth in long term evolution (LTE). Limited number of reference signal symbols for performing RSTD measurements reduces the quality of the timing and position estimations. To overcome this limitation, we propose to share the PRS transmit port with one of the cell-specific reference signals (CRS) transmit ports, named C-PRS scheme. To get over 10% performance enhancements for small bandwidth cases, we pay an extra complexity from 3 CRS symbols. In order to reduce the overhead of large PRS bandwidth subframes, PRSs keep only in odd slots and data can be transmitted in even slots. The C-PRS scheme may transmit extra 3~4 symbols per one PRS subframe with the negligible losses of performance in the large PRS bandwidth cases. We also discuss the implementation of RSTD measurements which compute the cross-correlation of scalable bandwidth signals by dynamic or fixed FFT/IFFT size algorithms. The fixed FFT/IFFT size algorithm can balance the computation efficiency and the size of local memories.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"07 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127246342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577259
Kirti Chawla, Christopher McFarland, G. Robins, Connor Shope
New computing paradigms have underscored the need to locate objects in an environment, motivating several object localization approaches targeting competing technologies and specific applications. While RFID technology recently emerged as a viable platform for locating objects, several unresolved key challenges precluded higher performance and wider applicability. We present an RFID-based real-time location system that uses Received Signal Strength (RSS) to better model the distance-decaying behavior of radio signals in an orientation-agnostic manner.We experimentally leverage the proposed robust models to simultaneously locate several stationary and mobile objects tagged with passive tags in a realistically noisy indoor environment, with an average accuracy of 0.6 meters. A more general conclusion of this work is that contrary to common belief, RSS can indeed serve as reliable metric for a variety of select applications, including localization.
{"title":"Real-time RFID localization using RSS","authors":"Kirti Chawla, Christopher McFarland, G. Robins, Connor Shope","doi":"10.1109/ICL-GNSS.2013.6577259","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577259","url":null,"abstract":"New computing paradigms have underscored the need to locate objects in an environment, motivating several object localization approaches targeting competing technologies and specific applications. While RFID technology recently emerged as a viable platform for locating objects, several unresolved key challenges precluded higher performance and wider applicability. We present an RFID-based real-time location system that uses Received Signal Strength (RSS) to better model the distance-decaying behavior of radio signals in an orientation-agnostic manner.We experimentally leverage the proposed robust models to simultaneously locate several stationary and mobile objects tagged with passive tags in a realistically noisy indoor environment, with an average accuracy of 0.6 meters. A more general conclusion of this work is that contrary to common belief, RSS can indeed serve as reliable metric for a variety of select applications, including localization.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126379139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-25DOI: 10.1109/ICL-GNSS.2013.6577271
Yue Wang, M. Wiemeler, Feng Zheng, W. Xiong, T. Kaiser
Self-localization using unsynchronized low-complexity anchors has a number of attractive features. Traditional self-localization techniques are not suitable to this scenario or have their applicability limitations. In this paper, a two-step hybrid self-localization technique using unsynchronized low-complexity anchors is proposed, which can achieve two-dimensional (2-D) instantaneous localization for both mobile and fixed agents and eliminate the need for heading information of the agents. In the first step, an initial location estimate is obtained utilizing range information based on received-signal-strength (RSS) measurements. In the second step, differential angle-of-arrival (AOA) measurements are converted to range measurements with the aid of the first step location estimate. Finally, a two-step hybrid localization algorithm is obtained using all the measurements in the first step and the second step. Simulation results show that the two-step hybrid self-localization technique has relatively high accuracy even in the scenarios with large RSS-based ranging variances and medium AOA measurement variances.
{"title":"Two-step hybrid self-localization using unsynchronized low-complexity anchors","authors":"Yue Wang, M. Wiemeler, Feng Zheng, W. Xiong, T. Kaiser","doi":"10.1109/ICL-GNSS.2013.6577271","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577271","url":null,"abstract":"Self-localization using unsynchronized low-complexity anchors has a number of attractive features. Traditional self-localization techniques are not suitable to this scenario or have their applicability limitations. In this paper, a two-step hybrid self-localization technique using unsynchronized low-complexity anchors is proposed, which can achieve two-dimensional (2-D) instantaneous localization for both mobile and fixed agents and eliminate the need for heading information of the agents. In the first step, an initial location estimate is obtained utilizing range information based on received-signal-strength (RSS) measurements. In the second step, differential angle-of-arrival (AOA) measurements are converted to range measurements with the aid of the first step location estimate. Finally, a two-step hybrid localization algorithm is obtained using all the measurements in the first step and the second step. Simulation results show that the two-step hybrid self-localization technique has relatively high accuracy even in the scenarios with large RSS-based ranging variances and medium AOA measurement variances.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115855337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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