Pub Date : 2015-11-12DOI: 10.1109/IWMN.2015.7322982
F. Baselice, V. Pascazio, G. Ferraioli
Within this manuscript a new application of Com-pressive Sensing (CS) in Magnetic Resonance Imaging field with the aim of jointly exploit multiple measurements is presented. At the present, in literature CS is exploited in order to allow image formation from a non fully sampled k-space signals, greatly reducing the acquisition time. What we propose is the exploitation of CS for achieving the so called super-resolution, i.e. the possibility of distinguish anatomical structures smaller than the spatial resolution of the image. In particular, the proposed Intra Voxel Analysis (IVA) technique, by combining different acquisition with standard resolution, is able to estimate contributions from different tissues inside the same voxel.
{"title":"The exploitation of multiple MR measurements for diagnosis support","authors":"F. Baselice, V. Pascazio, G. Ferraioli","doi":"10.1109/IWMN.2015.7322982","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322982","url":null,"abstract":"Within this manuscript a new application of Com-pressive Sensing (CS) in Magnetic Resonance Imaging field with the aim of jointly exploit multiple measurements is presented. At the present, in literature CS is exploited in order to allow image formation from a non fully sampled k-space signals, greatly reducing the acquisition time. What we propose is the exploitation of CS for achieving the so called super-resolution, i.e. the possibility of distinguish anatomical structures smaller than the spatial resolution of the image. In particular, the proposed Intra Voxel Analysis (IVA) technique, by combining different acquisition with standard resolution, is able to estimate contributions from different tissues inside the same voxel.","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123439257","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 : 2015-11-12DOI: 10.1109/IWMN.2015.7322976
Valter Pasku, M. L. Fravolini, A. Moschitta
In this paper, a 2.5D positioning system is analyzed, based on Received Signal Strength (RSS) measurements, collected from narrowband RF transmissions. The mobile node of the considered system uses multiple closely spaced receivers, collecting RSS measurements and combining them to mitigate multipath effects. Using simulations and optical approximation, the effect of antenna directivity on the positioning accuracy is analyzed. Moreover, a simple iterative method is proposed, that further improves the accuracy obtained using the multipath mitigation technique.
{"title":"Effects of antenna directivity on a 2.5D positioning technique based on multiple RF transceivers","authors":"Valter Pasku, M. L. Fravolini, A. Moschitta","doi":"10.1109/IWMN.2015.7322976","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322976","url":null,"abstract":"In this paper, a 2.5D positioning system is analyzed, based on Received Signal Strength (RSS) measurements, collected from narrowband RF transmissions. The mobile node of the considered system uses multiple closely spaced receivers, collecting RSS measurements and combining them to mitigate multipath effects. Using simulations and optical approximation, the effect of antenna directivity on the positioning accuracy is analyzed. Moreover, a simple iterative method is proposed, that further improves the accuracy obtained using the multipath mitigation technique.","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128097909","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 : 2015-11-12DOI: 10.1109/IWMN.2015.7322968
L. Angrisani, Guido D'Alessandro, M. D’Arco, V. Paciello, A. Pietrosanto
Drones like helicopters use vertical oriented rotors to lift and navigate forward. Thanks to the use of modern flight controllers, they often can fly autonomously. Namely, the user can mark target points on a map to which the helicopter is driven by the software controller without any other interventions of the user. Once on the target, the helicopter performs the intended task, such as landing, catching aerial photos, or releasing loads. But, in order to be fully autonomous the helicopters should be also capable of recharging the on board batteries, as it is required to complete long lasting missions, without requiring any external interventions. A helicopter equipped with a suitable hardware that allows autonomous recharge by simply landing on a given platform is presented. The front-end of the on-board recharging circuit is capable of linking the time varying induction flow, produced by a circuit integrated in the landing platform, and converting the power associated to the magnetic field from AC to DC in order to recharge the helicopter battery.
{"title":"Autonomous recharge of drones through an induction based power transfer system","authors":"L. Angrisani, Guido D'Alessandro, M. D’Arco, V. Paciello, A. Pietrosanto","doi":"10.1109/IWMN.2015.7322968","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322968","url":null,"abstract":"Drones like helicopters use vertical oriented rotors to lift and navigate forward. Thanks to the use of modern flight controllers, they often can fly autonomously. Namely, the user can mark target points on a map to which the helicopter is driven by the software controller without any other interventions of the user. Once on the target, the helicopter performs the intended task, such as landing, catching aerial photos, or releasing loads. But, in order to be fully autonomous the helicopters should be also capable of recharging the on board batteries, as it is required to complete long lasting missions, without requiring any external interventions. A helicopter equipped with a suitable hardware that allows autonomous recharge by simply landing on a given platform is presented. The front-end of the on-board recharging circuit is capable of linking the time varying induction flow, produced by a circuit integrated in the landing platform, and converting the power associated to the magnetic field from AC to DC in order to recharge the helicopter battery.","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132345300","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 : 2015-11-12DOI: 10.1109/IWMN.2015.7322979
Francisco Javier Delgado Alvarez, P. G. Villardon
Since 2002 many works have been published applying Principal Component Analysis (PCA) in the study of network traffic. These investigations have revealed some issues inherent to the temporal and spatial correlations present in the data, which are not considered in PCA. The proposed solutions to these problems include the formulation of a new matrix of data “rearranged” to take these effects into consideration. Nevertheless the “classical” Biplot methods (GH, JK, HJ) reflect both correlations between time intervals and between time series. The Biplot methods provide graphical procedures that offer more information about the behavior of time series than PCA, while making possible the use of more specific quality of representation metrics. In the case of HJ-Biplot, the graphical display obtained has maximum quality of representation for rows and columns.
{"title":"A proposal for spatio-temporal analysis of traffic matrices using HJ-biplot","authors":"Francisco Javier Delgado Alvarez, P. G. Villardon","doi":"10.1109/IWMN.2015.7322979","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322979","url":null,"abstract":"Since 2002 many works have been published applying Principal Component Analysis (PCA) in the study of network traffic. These investigations have revealed some issues inherent to the temporal and spatial correlations present in the data, which are not considered in PCA. The proposed solutions to these problems include the formulation of a new matrix of data “rearranged” to take these effects into consideration. Nevertheless the “classical” Biplot methods (GH, JK, HJ) reflect both correlations between time intervals and between time series. The Biplot methods provide graphical procedures that offer more information about the behavior of time series than PCA, while making possible the use of more specific quality of representation metrics. In the case of HJ-Biplot, the graphical display obtained has maximum quality of representation for rows and columns.","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128656836","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 : 2015-11-12DOI: 10.1109/IWMN.2015.7322974
Fabian Höflinger, J. Bordoy, Nikolas Simon, Johannes Wendeberg, L. Reindl, C. Schindelhauer
In this paper we present an indoor-localization system using sound signals which are outside of the audible range with an error in the range of centimeters. The innovative distinctive feature of the proposed system is based on the high accuracy due to the acoustic run-time measurements. Therefore this approach is more precise than other indoor-localization systems based on Wi-Fi or Bluetooth. Furthermore, it is user-friendly as the user needs only his smartphone and no additional hardware. With its high precision the system allows entirely new applications in indoor localization. In particular, it has the technological potential to help blind people to navigate through public and administrative buildings without the need of assistance from others. In this novel approach we implement an unscented Kalman filter which proves to be capable of tracking not only the position of the target but also the time offset of the smartphone clock, reducing the required number of available receivers for localization. Besides, the precise synchronization of the receivers allows us to track the current position of the smartphone user with a median error of 9 cm and a standard deviation of 9 cm in a real-world scenario. In this way, the user is enabled to track his current location in a building with a very high accuracy.
{"title":"Indoor-localization system for smart phones","authors":"Fabian Höflinger, J. Bordoy, Nikolas Simon, Johannes Wendeberg, L. Reindl, C. Schindelhauer","doi":"10.1109/IWMN.2015.7322974","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322974","url":null,"abstract":"In this paper we present an indoor-localization system using sound signals which are outside of the audible range with an error in the range of centimeters. The innovative distinctive feature of the proposed system is based on the high accuracy due to the acoustic run-time measurements. Therefore this approach is more precise than other indoor-localization systems based on Wi-Fi or Bluetooth. Furthermore, it is user-friendly as the user needs only his smartphone and no additional hardware. With its high precision the system allows entirely new applications in indoor localization. In particular, it has the technological potential to help blind people to navigate through public and administrative buildings without the need of assistance from others. In this novel approach we implement an unscented Kalman filter which proves to be capable of tracking not only the position of the target but also the time offset of the smartphone clock, reducing the required number of available receivers for localization. Besides, the precise synchronization of the receivers allows us to track the current position of the smartphone user with a median error of 9 cm and a standard deviation of 9 cm in a real-world scenario. In this way, the user is enabled to track his current location in a building with a very high accuracy.","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128030621","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 : 2015-11-12DOI: 10.1109/IWMN.2015.7322994
M. Migliaccio, J. Gil, A. Sorrentino, F. Nunziata, G. Ferrara, A. Gifuni
In this paper an alternative method for evaluating the spatial uniform and isotropic electromagnetic field within a reverberating chamber (RC) is proposed. Experiments accomplished at the RC of the Università degli Studi di Napoli Parthenope, formerly Istituto Universitario Navale (IUN) confirm the soundness of the proposed model and its effectiveness from an operational point of view.
{"title":"An alternative method for evaluating a spatial uniform and isotropic electromagnetic field within a reverberating chamber","authors":"M. Migliaccio, J. Gil, A. Sorrentino, F. Nunziata, G. Ferrara, A. Gifuni","doi":"10.1109/IWMN.2015.7322994","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322994","url":null,"abstract":"In this paper an alternative method for evaluating the spatial uniform and isotropic electromagnetic field within a reverberating chamber (RC) is proposed. Experiments accomplished at the RC of the Università degli Studi di Napoli Parthenope, formerly Istituto Universitario Navale (IUN) confirm the soundness of the proposed model and its effectiveness from an operational point of view.","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124829507","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 : 2015-11-12DOI: 10.1109/IWMN.2015.7322985
F. Baselice, G. Ferraioli, D. Reale
In the recent years, multi-channel Interferometric SAR (InSAR) techniques have proved to be effective in reconstructing the Digital Elevation Model (DEM) by unwrapping the interferometric phase. Commonly, multi-baseline or multi-frequency configurations are adopted for this aim. In this paper, the possibility of jointly exploiting multi-baseline and multi-frequency approaches for SAR interferometry in Ground Based (GB-SAR) configuration is addresses. An analysis of the achievable performances has been carried out, by exploiting both Cramer-Rao Lower Bounds (CRLB) and Error Lower Bounds (ELB).
{"title":"Multi-frequency and multi-baseline ground based SAR for environmental monitoring","authors":"F. Baselice, G. Ferraioli, D. Reale","doi":"10.1109/IWMN.2015.7322985","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322985","url":null,"abstract":"In the recent years, multi-channel Interferometric SAR (InSAR) techniques have proved to be effective in reconstructing the Digital Elevation Model (DEM) by unwrapping the interferometric phase. Commonly, multi-baseline or multi-frequency configurations are adopted for this aim. In this paper, the possibility of jointly exploiting multi-baseline and multi-frequency approaches for SAR interferometry in Ground Based (GB-SAR) configuration is addresses. An analysis of the achievable performances has been carried out, by exploiting both Cramer-Rao Lower Bounds (CRLB) and Error Lower Bounds (ELB).","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129461365","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 : 2015-11-12DOI: 10.1109/IWMN.2015.7322978
Ginés Escudero-Andreu, K. Kyriakopoulos, Francisco J. Aparicio-Navarro, D. Parish, Diego Santoro, M. Vadursi
Wireless communications are potentially exposed to jamming due to the openness of the medium and, in particular, to virtual jamming, which allows more energy-efficient attacks. In this paper we tackle the problem of virtual jamming attacks on IEEE 802.11 networks and present a data fusion solution for the detection of a type of virtual jamming attack (namely, NAV attacks), based on the real-time monitoring of a set of metrics. The detection performance is evaluated in a number of real scenarios.
{"title":"A data fusion technique to detect wireless network virtual jamming attacks","authors":"Ginés Escudero-Andreu, K. Kyriakopoulos, Francisco J. Aparicio-Navarro, D. Parish, Diego Santoro, M. Vadursi","doi":"10.1109/IWMN.2015.7322978","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322978","url":null,"abstract":"Wireless communications are potentially exposed to jamming due to the openness of the medium and, in particular, to virtual jamming, which allows more energy-efficient attacks. In this paper we tackle the problem of virtual jamming attacks on IEEE 802.11 networks and present a data fusion solution for the detection of a type of virtual jamming attack (namely, NAV attacks), based on the real-time monitoring of a set of metrics. The detection performance is evaluated in a number of real scenarios.","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131464864","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 : 2015-11-12DOI: 10.1109/IWMN.2015.7322970
M. Macucci, S. Pascoli, P. Marconcini, B. Tellini
We present a network of wireless ultra-low-power sensors with the main purpose of detecting the derailment of a freight car and alerting the engineer in the cab of the leading locomotive. Due to the lack of a power supply in freight cars, we plan to rely on energy scavenging from vibrations. This implies that the energy requirements of the system must be minimized, choosing ultra-low-power hardware and operating it in active mode only for a small fraction of the time. We discuss the approach that we are currently pursuing, focusing, in particular, on the choice of hardware and the communication protocol.
{"title":"Wireless sensor network for derailment detection in freight trains powered from vibrations","authors":"M. Macucci, S. Pascoli, P. Marconcini, B. Tellini","doi":"10.1109/IWMN.2015.7322970","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322970","url":null,"abstract":"We present a network of wireless ultra-low-power sensors with the main purpose of detecting the derailment of a freight car and alerting the engineer in the cab of the leading locomotive. Due to the lack of a power supply in freight cars, we plan to rely on energy scavenging from vibrations. This implies that the energy requirements of the system must be minimized, choosing ultra-low-power hardware and operating it in active mode only for a small fraction of the time. We discuss the approach that we are currently pursuing, focusing, in particular, on the choice of hardware and the communication protocol.","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124405128","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 : 2015-11-12DOI: 10.1109/IWMN.2015.7322964
L. Hörmann, A. Berger, Albert Potsch, P. Priller, A. Springer
Wireless sensor networks (WSNs) are typically used to measure physical quantities of their environment at locations characterized by poor accessibility and lacking of wired infrastructure. To extend the operational time, energy harvesting systems (EHSs) support the power supply by transforming environmental energy into electrical energy. In the best case, a self-sufficient supply of the sensor node is possible. Information about the harvestable energy is necessary to design WSNs and EHSs properly. However, detailed information is often not available and special equipment is necessary to measure it. Therefore, this paper presents a simple method to estimate and track the harvestable power. The results can be used offline for design and simulations of nodes or networks, or online for work-load-distribution or energy aware network routing.
{"title":"Estimation of the harvestable power on wireless sensor nodes","authors":"L. Hörmann, A. Berger, Albert Potsch, P. Priller, A. Springer","doi":"10.1109/IWMN.2015.7322964","DOIUrl":"https://doi.org/10.1109/IWMN.2015.7322964","url":null,"abstract":"Wireless sensor networks (WSNs) are typically used to measure physical quantities of their environment at locations characterized by poor accessibility and lacking of wired infrastructure. To extend the operational time, energy harvesting systems (EHSs) support the power supply by transforming environmental energy into electrical energy. In the best case, a self-sufficient supply of the sensor node is possible. Information about the harvestable energy is necessary to design WSNs and EHSs properly. However, detailed information is often not available and special equipment is necessary to measure it. Therefore, this paper presents a simple method to estimate and track the harvestable power. The results can be used offline for design and simulations of nodes or networks, or online for work-load-distribution or energy aware network routing.","PeriodicalId":440636,"journal":{"name":"2015 IEEE International Workshop on Measurements & Networking (M&N)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115662835","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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