University of Urbino

Displaying 1-23 of 23 results

  • White Papers // Jun 2013

    Rethinking Abstractions for Big Data: Why, Where, How, and What

    Big data refers to large and complex data sets that, under existing approaches, exceed the capacity and capability of current compute platforms, systems software, analytical tools and human understanding. Numerous lessons on the scalability of big data can already be found in asymptotic analysis of algorithms and from the High-Performance...

    Provided By University of Urbino

  • White Papers // Feb 2013

    Breathfinding: A Wireless Network that Monitors and Locates Breathing in a Home

    In this paper, the authors explores using RSS measurements on many links in a wireless network to estimate the breathing rate of a person, and the location where the breathing is occurring, in a home, while the person is sitting, laying down, standing, or sleeping. The main challenge in breathing...

    Provided By University of Urbino

  • White Papers // May 2012

    RF-Based Device-Free Localization and Tracking for Ambient Assisted Living

    Radio Frequency (RF) sensor networks are Wireless Sensor Networks (WSNs) which use only the received signal strength (RSS) to perform tasks such as Device-Free Localization (DFL) and tracking of individuals. In these systems, people to be located do not participate in the localization effort by carrying any radio device or...

    Provided By University of Urbino

  • White Papers // Jan 2012

    Hidden Markov Estimation of Bistatic Range From Cluttered Ultra-Wideband Impulse Responses

    Multi-static radar is used for target detection and tracking in buildings and rooms. Target detection and tracking relies on accurate knowledge of the excess delay of the multipath component which travels from the transmitter, to the target, and then to the receiver. If the environment creates many multipath components, individual...

    Provided By University of Urbino

  • White Papers // Jan 2012

    Cross Layer Multirate Adaptation Using Physical Capture

    In this paper, to improve the performance of multi-hop wireless networks, the authors explore a CROss layer Multi-rate Adaptation scheme (they call it CROMA) that uses the phenomenon of physical capture at the physical layer for effectively distinguishing losses due to collisions from those due to channel-error. They first estimate...

    Provided By University of Urbino

  • White Papers // Oct 2011

    Channel Sounding for the Masses: Low Complexity GNU 802.11b Channel Impulse Response Estimation

    New techniques in cross-layer wireless networks are building demand for ubiquitous channel sounding, that is, the capability to measure Channel Impulse Response (CIR) with any standard wireless network and node. Towards that goal, the authors present a software-defined IEEE 802.11b receiver and CIR measurement system with little additional computational complexity...

    Provided By University of Urbino

  • White Papers // Jul 2011

    Noise Reduction for Variance-Based Device-Free Localization and Tracking

    Human motion in the vicinity of a wireless link causes variations in the link Received Signal Strength (RSS). Device-Free Localization (DFL) systems, such as Variance-based Radio Tomographic Imaging (VRTI) use these RSS variations in a wireless network to detect, locate and track people in the area of the network, even...

    Provided By University of Urbino

  • White Papers // Mar 2011

    Directed by Directionality: Benefiting From the Gain Pattern of Active RFID Badges

    Tracking of people via active badges is important for location-aware computing and for security applications. However, the human body has a major effect on the antenna gain pattern of the device that the person is wearing. In this paper, the gain pattern due to the effect of the human body...

    Provided By University of Urbino

  • White Papers // Mar 2011

    Detecting Malicious Nodes in RSS-Based Localization

    Measurements of Received Signal Strength (RSS) on wireless links provide position information in various localization systems, including multi-lateration-based and fingerprint-based positioning systems, and device-free localization systems. Existing localization schemes assume a fixed or known transmit power. Therefore, any variation in transmit power can result in error in location estimation. In...

    Provided By University of Urbino

  • White Papers // Jan 2011

    Ouverture De 'Marketing Channels And Global Markets'

    The current global economic crisis has dramatically modified mass consumption, reducing purchases of basic products such as cars, food, clothing, books and toys. With a closer look, however, a number of important consumption areas are bucking the trend, like products with technology negotiated in dollars (cleaning chemicals, cell phones, plasma...

    Provided By University of Urbino

  • White Papers // Sep 2010

    Single Carrier Frequency Division Multiple Access (SC-FDMA) for Filter Bank Multicarrier Communication Systems

    The Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) radio standard has adopted a special form of Orthogonal Frequency Division Multiplexing (OFDM) method for the uplink of multiple access networks. This method which is called Single Carrier Frequency Division Multiple Access (SC-FDMA) applies a precoding to each user data...

    Provided By University of Urbino

  • White Papers // May 2010

    RF Sensor Networks for Device-Free Localization: Measurements, Models and Algorithms

    The authors discuss the emerging application of device-free localization using wireless sensor networks, which find people and objects in the environment in which the network is deployed, even in buildings and through walls. These networks are termed "RF sensor networks" because the wireless network itself is the sensor, using RF...

    Provided By University of Urbino

  • White Papers // Feb 2010

    Application of Nonbinary LDPC Codes for Communication Over Fading Channels Using Higher Order Modulations

    In this paper, the authors investigate the application of non-binary Low Density Parity Check (LDPC) codes over Galois field GF(q) for both Single-Input Single-Output (SISO) and Multiple Input Multiple-Output (MIMO) fading channels using higher order modulations. As opposed to the widely studied binary systems that employ joint detection and channel...

    Provided By University of Urbino

  • White Papers // Jan 2010

    Remote Power Control of Wireless Network Interfaces

    This paper presents a new power management technique aimed at increasing the energy efficiency of client-server multimedia applications running on wireless portable devices. Authors focus on reducing the energy consumption of the wireless network interface of the client by allowing the remote server to control the power configuration of the...

    Provided By University of Urbino

  • White Papers // Sep 2009

    Radio Tomographic Imaging With Wireless Networks

    Radio Tomographic Imaging (RTI) is an emerging technology for imaging the attenuation caused by physical objects in wireless networks. This paper presents a linear model for using Received Signal Strength (RSS) measurements to obtain images of moving objects. Noise models are investigated based on real measurements of a deployed RTI...

    Provided By University of Urbino

  • White Papers // Aug 2009

    Mobility Assisted Secret Key Generation Using Wireless Link Signatures

    The authors propose an approach where wireless devices, interested in establishing a secret key, sample the Channel Impulse Response (CIR) space in a physical area to collect and combine uncorrelated CIR measurements to generate the secret key. They study the impact of mobility patterns in obtaining uncorrelated measurements. Using extensive...

    Provided By University of Urbino

  • White Papers // Jun 2009

    Parameter Derivation of Type-2 Discrete-Time Phase-Locked Loops Containing Feedback Delays

    Modern implementations of Discrete-Time Phase-Locked Loops (DT-PLLs) often contain delayed feedback. The delays are usually a side effect to pipelining, filtering, or other inner-loop mechanisms. Each delay increases the order of the system by introducing an additional pole to the closed-loop transfer function, and in many cases, makes the traditional...

    Provided By University of Urbino

  • White Papers // May 2009

    High Rate Uncorrelated Bit Extraction for Shared Secret Key Generation From Channel Measurements

    Secret keys can be generated and shared between two wireless nodes by measuring and encoding radio channel characteristics without ever revealing the secret key to an eavesdropper at a third location. This paper addresses bit extraction, i.e., the extraction of secret key bits from noisy radio channel measurements at two...

    Provided By University of Urbino

  • White Papers // Apr 2009

    Regularization Methods for Radio Tomographic Imaging

    Radio Tomographic Imaging (RTI) is a method for imaging the attenuation of physical objects within areas surrounded by wireless radios. RTI uses Received Signal Strength (RSS) measurements that traverse the network area to reconstruct an image of where the signals are being attenuated. Previous work developed a linear model relating...

    Provided By University of Urbino

  • White Papers // Apr 2009

    Location Distinction in a MIMO Channel

    Location distinction is defined as determining when a device has changed its position. Previous work has shown that a wireless network can be exploited to successfully perform location distinction by measuring the characteristics of the SISO radio channel between the wireless device and one or more receivers. The authors propose...

    Provided By University of Urbino

  • White Papers // Jan 2009

    Does Employment Protection Legislation Affect Firm Investment? The European Case

    This paper aims at analyzing the impact of Employment Protection Legislation (EPL) on firms' investment policies in the presence of financial imperfections. The authors' results show that investment is positively correlated to measures of internal funds available to firms and negatively to the level of national labour market regulation. Moreover,...

    Provided By University of Urbino

  • White Papers // Jun 2008

    Supply Network Strategies An Inquiry Into The Changes In The Italian Mid-Sized Company And Its Supplier Relationships

    The paper analyzes the changes affecting the supply network strategies of mid-sized Italian companies born and developed leveraging on strong supply network relationships with co-localized actors within their industrial district contexts. Particular attention is devoted to the changes concerning the management of their local and global supplier relationships as a...

    Provided By University of Urbino

  • White Papers // Jun 2008

    The Role Of Relational Capabilities In The Organization Of International Sourcing Activities

    This paper proposes a relational capability framework to investigate the main organisational patterns in managing international sourcing activities by MultiNational Companies (MNCs). Specifically, this framework will be adopted in order to examine the current understanding - developed in the academic literature - of intra-organisational mechanisms supporting international sourcing activities concerning...

    Provided By University of Urbino

  • White Papers // May 2012

    RF-Based Device-Free Localization and Tracking for Ambient Assisted Living

    Radio Frequency (RF) sensor networks are Wireless Sensor Networks (WSNs) which use only the received signal strength (RSS) to perform tasks such as Device-Free Localization (DFL) and tracking of individuals. In these systems, people to be located do not participate in the localization effort by carrying any radio device or...

    Provided By University of Urbino

  • White Papers // Jan 2012

    Hidden Markov Estimation of Bistatic Range From Cluttered Ultra-Wideband Impulse Responses

    Multi-static radar is used for target detection and tracking in buildings and rooms. Target detection and tracking relies on accurate knowledge of the excess delay of the multipath component which travels from the transmitter, to the target, and then to the receiver. If the environment creates many multipath components, individual...

    Provided By University of Urbino

  • White Papers // Oct 2011

    Channel Sounding for the Masses: Low Complexity GNU 802.11b Channel Impulse Response Estimation

    New techniques in cross-layer wireless networks are building demand for ubiquitous channel sounding, that is, the capability to measure Channel Impulse Response (CIR) with any standard wireless network and node. Towards that goal, the authors present a software-defined IEEE 802.11b receiver and CIR measurement system with little additional computational complexity...

    Provided By University of Urbino

  • White Papers // Jul 2011

    Noise Reduction for Variance-Based Device-Free Localization and Tracking

    Human motion in the vicinity of a wireless link causes variations in the link Received Signal Strength (RSS). Device-Free Localization (DFL) systems, such as Variance-based Radio Tomographic Imaging (VRTI) use these RSS variations in a wireless network to detect, locate and track people in the area of the network, even...

    Provided By University of Urbino

  • White Papers // Mar 2011

    Detecting Malicious Nodes in RSS-Based Localization

    Measurements of Received Signal Strength (RSS) on wireless links provide position information in various localization systems, including multi-lateration-based and fingerprint-based positioning systems, and device-free localization systems. Existing localization schemes assume a fixed or known transmit power. Therefore, any variation in transmit power can result in error in location estimation. In...

    Provided By University of Urbino

  • White Papers // Mar 2011

    Directed by Directionality: Benefiting From the Gain Pattern of Active RFID Badges

    Tracking of people via active badges is important for location-aware computing and for security applications. However, the human body has a major effect on the antenna gain pattern of the device that the person is wearing. In this paper, the gain pattern due to the effect of the human body...

    Provided By University of Urbino

  • White Papers // May 2010

    RF Sensor Networks for Device-Free Localization: Measurements, Models and Algorithms

    The authors discuss the emerging application of device-free localization using wireless sensor networks, which find people and objects in the environment in which the network is deployed, even in buildings and through walls. These networks are termed "RF sensor networks" because the wireless network itself is the sensor, using RF...

    Provided By University of Urbino

  • White Papers // Sep 2009

    Radio Tomographic Imaging With Wireless Networks

    Radio Tomographic Imaging (RTI) is an emerging technology for imaging the attenuation caused by physical objects in wireless networks. This paper presents a linear model for using Received Signal Strength (RSS) measurements to obtain images of moving objects. Noise models are investigated based on real measurements of a deployed RTI...

    Provided By University of Urbino

  • White Papers // Aug 2009

    Mobility Assisted Secret Key Generation Using Wireless Link Signatures

    The authors propose an approach where wireless devices, interested in establishing a secret key, sample the Channel Impulse Response (CIR) space in a physical area to collect and combine uncorrelated CIR measurements to generate the secret key. They study the impact of mobility patterns in obtaining uncorrelated measurements. Using extensive...

    Provided By University of Urbino

  • White Papers // Jun 2009

    Parameter Derivation of Type-2 Discrete-Time Phase-Locked Loops Containing Feedback Delays

    Modern implementations of Discrete-Time Phase-Locked Loops (DT-PLLs) often contain delayed feedback. The delays are usually a side effect to pipelining, filtering, or other inner-loop mechanisms. Each delay increases the order of the system by introducing an additional pole to the closed-loop transfer function, and in many cases, makes the traditional...

    Provided By University of Urbino

  • White Papers // Jan 2012

    Cross Layer Multirate Adaptation Using Physical Capture

    In this paper, to improve the performance of multi-hop wireless networks, the authors explore a CROss layer Multi-rate Adaptation scheme (they call it CROMA) that uses the phenomenon of physical capture at the physical layer for effectively distinguishing losses due to collisions from those due to channel-error. They first estimate...

    Provided By University of Urbino

  • White Papers // Apr 2009

    Regularization Methods for Radio Tomographic Imaging

    Radio Tomographic Imaging (RTI) is a method for imaging the attenuation of physical objects within areas surrounded by wireless radios. RTI uses Received Signal Strength (RSS) measurements that traverse the network area to reconstruct an image of where the signals are being attenuated. Previous work developed a linear model relating...

    Provided By University of Urbino

  • White Papers // Apr 2009

    Location Distinction in a MIMO Channel

    Location distinction is defined as determining when a device has changed its position. Previous work has shown that a wireless network can be exploited to successfully perform location distinction by measuring the characteristics of the SISO radio channel between the wireless device and one or more receivers. The authors propose...

    Provided By University of Urbino

  • White Papers // May 2009

    High Rate Uncorrelated Bit Extraction for Shared Secret Key Generation From Channel Measurements

    Secret keys can be generated and shared between two wireless nodes by measuring and encoding radio channel characteristics without ever revealing the secret key to an eavesdropper at a third location. This paper addresses bit extraction, i.e., the extraction of secret key bits from noisy radio channel measurements at two...

    Provided By University of Urbino

  • White Papers // Feb 2013

    Breathfinding: A Wireless Network that Monitors and Locates Breathing in a Home

    In this paper, the authors explores using RSS measurements on many links in a wireless network to estimate the breathing rate of a person, and the location where the breathing is occurring, in a home, while the person is sitting, laying down, standing, or sleeping. The main challenge in breathing...

    Provided By University of Urbino

  • White Papers // Feb 2010

    Application of Nonbinary LDPC Codes for Communication Over Fading Channels Using Higher Order Modulations

    In this paper, the authors investigate the application of non-binary Low Density Parity Check (LDPC) codes over Galois field GF(q) for both Single-Input Single-Output (SISO) and Multiple Input Multiple-Output (MIMO) fading channels using higher order modulations. As opposed to the widely studied binary systems that employ joint detection and channel...

    Provided By University of Urbino

  • White Papers // Jun 2013

    Rethinking Abstractions for Big Data: Why, Where, How, and What

    Big data refers to large and complex data sets that, under existing approaches, exceed the capacity and capability of current compute platforms, systems software, analytical tools and human understanding. Numerous lessons on the scalability of big data can already be found in asymptotic analysis of algorithms and from the High-Performance...

    Provided By University of Urbino

  • White Papers // Jan 2010

    Remote Power Control of Wireless Network Interfaces

    This paper presents a new power management technique aimed at increasing the energy efficiency of client-server multimedia applications running on wireless portable devices. Authors focus on reducing the energy consumption of the wireless network interface of the client by allowing the remote server to control the power configuration of the...

    Provided By University of Urbino

  • White Papers // Jun 2008

    Supply Network Strategies An Inquiry Into The Changes In The Italian Mid-Sized Company And Its Supplier Relationships

    The paper analyzes the changes affecting the supply network strategies of mid-sized Italian companies born and developed leveraging on strong supply network relationships with co-localized actors within their industrial district contexts. Particular attention is devoted to the changes concerning the management of their local and global supplier relationships as a...

    Provided By University of Urbino

  • White Papers // Jun 2008

    The Role Of Relational Capabilities In The Organization Of International Sourcing Activities

    This paper proposes a relational capability framework to investigate the main organisational patterns in managing international sourcing activities by MultiNational Companies (MNCs). Specifically, this framework will be adopted in order to examine the current understanding - developed in the academic literature - of intra-organisational mechanisms supporting international sourcing activities concerning...

    Provided By University of Urbino

  • White Papers // Jan 2011

    Ouverture De 'Marketing Channels And Global Markets'

    The current global economic crisis has dramatically modified mass consumption, reducing purchases of basic products such as cars, food, clothing, books and toys. With a closer look, however, a number of important consumption areas are bucking the trend, like products with technology negotiated in dollars (cleaning chemicals, cell phones, plasma...

    Provided By University of Urbino

  • White Papers // Jan 2009

    Does Employment Protection Legislation Affect Firm Investment? The European Case

    This paper aims at analyzing the impact of Employment Protection Legislation (EPL) on firms' investment policies in the presence of financial imperfections. The authors' results show that investment is positively correlated to measures of internal funds available to firms and negatively to the level of national labour market regulation. Moreover,...

    Provided By University of Urbino

  • White Papers // Sep 2010

    Single Carrier Frequency Division Multiple Access (SC-FDMA) for Filter Bank Multicarrier Communication Systems

    The Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) radio standard has adopted a special form of Orthogonal Frequency Division Multiplexing (OFDM) method for the uplink of multiple access networks. This method which is called Single Carrier Frequency Division Multiple Access (SC-FDMA) applies a precoding to each user data...

    Provided By University of Urbino