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mobile - wireless communications
(59050 results)-
White Papers
UPnP IPv4/IPv6 Bridge for Home Networking Environment
Dec 2008
The purposes of Universal Plug and Play (UPnP) are to allow consumer electronics, Intelligent Appliances (IA) and mobile devices from different vendors to be internet connected seamlessly and...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
An Efficient End-to-End Security Mechanism for IP Multimedia Subsystem
Jun 2008
With the rapid growth of the Internet and wireless communications, people make extensive use of portable wireless devices to access information such as voice, data and multimedia, any time from...
Provided by Reed Elsevier
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White Papers
Design and Implementation of Light-Weight Mobile Multicast for Fast MIPv6
Aug 2008
Mobile multicast is a research hotspot and can provide many applications. Some mobile multicast schemes have been proposed, but most of them introduce new entities and study construction...
Provided by Reed Elsevier
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White Papers
Providing Efficient Secured Mobile IPv6 by SAG and Robust Header Compression
Sep 2009
By providing ubiquitous Internet connectivity, wireless networks offer more convenient ways for users to surf the Internet. However, wireless networks encounter more technological challenges than...
Provided by Tamkang University
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White Papers
Supporting Adaptive Context-Aware Services and Novel Handover Scheme for Smart Ubiquitous Communication System
Oct 2008
Since people communicate with each other by mobile phones more and more frequently in daily lives, they pay more attention on the quality and rating of communication and the battery consumption...
Provided by Springer Science+Business Media
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White Papers
Bring QoS to P2P-Based Semantic Service Discovery for the Universal Network
Apr 2009
Services in the next generation Internet, Universal Network, is distinct from that in the current network. The reason is that the former has QoS (Quality of Service) grading. In the universal...
Provided by Springer Science+Business Media
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White Papers
Routing Optimization Over Network Mobility With Distributed Home Agents as the Cross Layer Consideration
Jun 2009
Routing Optimization (RO) is an important support for Mobile IPv6 while performing handover. It can reduce the overhead of a home agent and make the traffic more fluent between MN and CN; however,...
Provided by Springer Science+Business Media
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White Papers
Performance Optimization With Efficient Polling Mechanism in IEEE 802.16 Networks With Cross-Layer Consideration
Jul 2009
IEEE 802.16 standard suite defines a reservation-based bandwidth allocation mechanism. A SS (Subscriber Station) has to be polled to request bandwidth reservation before transmits uplink data to a...
Provided by Springer Science+Business Media
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White Papers
Tree-Clustered Data Gathering Protocol (TCDGP) for Wireless Sensor Networks
Dec 2010
Wireless Sensor Networks (WSNs) consists of plenty nodes which are low cost, low power consuming, small volume and short-transmitting. As sensor nodes are deployed in sensing field, they can help...
Provided by Northern Illinois University
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White Papers
Service Integration With UPnP Agent for an Ubiquitous Home Environment
Jun 2008
Consumer electronics and intelligent appliances can be successful and widely used in a smart or ubiquitous home environment. Service integration had become an important issue for system...
Provided by Springer Science+Business Media
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White Papers
An Efficient Mobile IPv6 Handover Scheme
Jul 2009
Excellent handover performance is essential for deploying real time applications over wireless Internets. In this paper, this study present a novel handover scheme for Mobile IPv6. The proposed...
Provided by Springer Science+Business Media
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White Papers
Design and Implementation of PMIPv6 Based Multihoming for Make-Before-Break Handover
Dec 2010
Unlike the various existing protocols for IP mobility management such as Mobile IPv6 (MIPv6), Proxy Mobile IPv6 (PMIPv6), which is a network-based approach, has salient features that expedite IP...
Provided by Beijing Jiaotong University
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White Papers
Survivable ATM Mesh Networks: Techniques and Performance Evaluation
Oct 2009
The Capacity and Flow Assignment problem in self-healing ATM networks is an interesting one from a Generalized Multi-Protocol Label Switching (GMPLS) prospective since IP and ATM protocols are...
Provided by Reed Elsevier
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White Papers
A Framework for Engineering Pervasive Applications Applied to Intra-Vehicular Sensor Network Applications
Apr 2009
The vehicle sector is one of the most exciting application areas for wireless ad hoc networks and pervasive computing technologies. Vehicles are constantly being equipped with more sensors and...
Provided by Springer Science+Business Media
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White Papers
Routing With Adaptive Path and Limited Flooding for Mobile Ad Hoc Networks
Apr 2009
In MANET, each mobile host can freely move around and the network topology is dynamically changing. To send a datagram, a source host broadcasts a route discovery packet to the network. All...
Provided by Reed Elsevier
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White Papers
Experimentation and Performance Analysis of Multi-Interfaced Mobile Router Scheme
Sep 2009
NEtwork MObility (NEMO) aims providing seamless Internet connectivity of the whole mobile network that consists of Mobile Routers (MRs) and Mobile Network Nodes (MNNs). The network moves around...
Provided by Reed Elsevier
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White Papers
Acquiring Authentic Data in Unattended Wireless Sensor Networks
Mar 2010
An Unattended Wireless Sensor Network (UWSN) can be used in many applications to collect valuable data. Nevertheless, due to the unattended nature, the sensors could be compromised and the sensor...
Provided by National Taiwan University
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White Papers
Cross-Layer TCP With Bitmap Error Recovery Scheme in Wireless Ad Hoc Networks
Nov 2009
Current TCP is not able to distinguish corruption losses from packet loss events. Hence, high transmission errors and varying inherent latency within a wireless network would cause seriously...
Provided by Springer Science+Business Media
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White Papers
DLNA-Based Multimedia Sharing System for OSGI Framework With Extension to P2P Network
Jun 2010
Multimedia video sharing has been developed rapidly over the past years. P2P multimedia sharing mechanisms for P2P network such as PPLive, PPStream, Joost, have been used popularly. However, if...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
A Proxy Mobile IPv6 Based Global Mobility Management Architecture and Protocol
Jul 2009
This paper specifies a global mobility management architecture and protocol procedure called GPMIP, which is based on Proxy Mobile IPv6. In GPMIP, mobility management is performed by the network...
Provided by Springer Science+Business Media
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White Papers
A Context-Aware Multi-Model Remote Controller for Electronic Home Devices
Jul 2009
In the past few years, household remote control products have continuously emerged, and more equipment could be controlled at remote distance. With continuous growth in the number of home remote...
Provided by Springer Science+Business Media
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White Papers
Threshold Jumping and Wrap-Around Scan Techniques Toward Efficient Tag Identification in High Density RFID Systems
Aug 2009
With the emergence of wireless RFID technologies, the problem of Anti-Collision has been arousing attention and instigated researchers to propose different heuristic algorithms for advancing RFID...
Provided by Springer Science+Business Media
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White Papers
Resolving Inter-Domain Routing Policy Disputes at Run-Time With Scalability Consideration
Dec 2009
Thousands of Autonomous Systems (ASes) cooperate with each other to provide global Internet connectivity. The Border Gateway Protocol (BGP) is currently the only inter-domain routing protocol...
Provided by Reed Elsevier
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White Papers
The Digital Forensics of Portable Electronic Communication Devices Based on a Skype IM Session of a Pocket PC for NGC
Dec 2010
Portable electronic communication devices can be used for many purposes and they are capable of integrating with Ubiquitous Computing (UC) infrastructures to carry on mobile multimedia...
Provided by John Wiley & Sons
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White Papers
A Collision Alleviation Scheme for IEEE 802.11p VANETs
Apr 2010
IEEE 802.11p protocol, also known as Wireless Access for the Vehicular Environment, provides dedicated short range communication for future Vehicular Ad Hoc NETworks (VANETs). According to the...
Provided by Springer Science+Business Media
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White Papers
A Two-Tier Framework for Transmission-Cost Minimization of High-Performance Communication Applications
Apr 2010
In two-tier High-Performance Networks (HPNs), some facilities are constructed to form a powerful supercomputing environment, and to alleviate server load. Then, the applications are provided by...
Provided by John Wiley & Sons
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White Papers
Optimization Architecture for Joint Multi-Path Routing and Scheduling in Wireless Mesh Networks
Mar 2010
In Wireless Mesh Networks (WMN), the optimal routing of data depends on the link capacities which are determined by link scheduling. The optimal performance of the network, therefore, can only be...
Provided by Reed Elsevier
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White Papers
Load-Balancing Mechanism for the RFID Middleware Applications Over Grid Networking
Apr 2010
RFID middleware often has to process enormous amounts of data, possibly causes overloading and leading to data errors. Therefore, RFID middleware applications require load-balancing mechanisms....
Provided by Reed Elsevier
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White Papers
NetTopo: A Framework of Simulation and Visualization for Wireless Sensor Networks
Oct 2008
Network simulators are necessary for testing algorithms of large scale Wireless Sensor Networks (WSNs), but lack the accuracy of real-world deployments. Deploying real WSN testbed provides a more...
Provided by National University Of Ireland
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White Papers
OSGi-Based Services Architecture for Cyber-Physical Home Control Systems
Dec 2010
With the development of digital home appliances, the vision of a digital home can be realized, and users can control home appliances by remote control through the home network. However, current...
Provided by Reed Elsevier
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White Papers
On the Robustness of BitTorrent Swarms to Greedy Peers
Oct 2010
The success of BitTorrent has fostered the development of variants to its basic components. Some of the variants adopt greedy approaches aiming at exploiting the intrinsic altruism of the original...
Provided by University of Verona
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White Papers
On the Optimal Blacklisting Threshold for Link Selection in Wireless Sensor Networks
Feb 2012
Empirical studies on link blacklisting show that the delivery rate is very sensitive to the calibration of the blacklisting threshold. If the calibration is too restrictive (the threshold is too...
Provided by University of Applied Sciences
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White Papers
On the Interplay of Low-Power Wireless Connectivity and Energy Consumption
Mar 2011
The authors present an extensive set of experimental results on two remote-access wireless sensor network testbeds that illustrate the interplay between network connectivity and energy...
Provided by University of Applied Sciences
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White Papers
Radio-Based Trail Usage Monitoring With Low-End Motes
Jan 2011
Outdoor automated people counting is essential to the proper management of recreational and protected areas. The authors present a solution for radio-based people counting that employs low-end...
Provided by University of Applied Sciences
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White Papers
Sensor Node Lifetime: An Experimental Study
Feb 2011
Node lifetime is a key performance metric in Wireless Sensor Network (WSN) research. Simplistic assumptions and naive lifetime estimation techniques invariably prove to be extremely unreliable in...
Provided by University of Applied Sciences
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White Papers
Implementation of the Wireless Autonomous Spanning Tree Protocol on Mote-Class Devices
May 2010
The Wireless Autonomous Spanning Tree Protocol combines medium access control and routing to streamline energy-efficient communication in Wireless Body Area Networks. As these networks generally...
Provided by University of Applied Sciences
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White Papers
ViMobiO: Virtual Mobility Overlay for Static Sensor Network Testbeds
Jun 2009
To streamline the development of protocols and applications for wireless sensor networks with mobile elements, the authors propose the use of a Virtual Mobility Overlay (ViMobiO). Using an idea...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Sensorless Sensing in Wireless Networks: Implementation and Measurements
Jan 2012
Multipath fading and shadowing are usually regarded as negative phenomena hindering proper radio communication. Adopting a completely different stance, this paper illustrates that such phenomena...
Provided by University of Notre Dame
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White Papers
Impact of Power-Law Topology on IP-Level Routing Dynamics: Simulation Results
Feb 2012
This paper focuses on the Internet IP-level routing topology and proposes relevant explanations to its apparent dynamics. The authors first represent this topology as a power-law random graph....
Provided by CNRS
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White Papers
Impact of Random Failures and Attacks on Poisson and Power-Law Random Networks
Aug 2009
It appeared recently that the underlying degree distribution of networks may play a crucial role concerning their robustness. Empiric and analytic results have been obtained, based on asymptotic...
Provided by CNRS
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White Papers
Towards a Theory for Securing Time Synchronization in Wireless Sensor Networks
Mar 2009
Time synchronization in highly distributed wireless systems like sensor and ad hoc networks is extremely important in order to maintain a consistent notion of time throughout the network and to...
Provided by Association for Computing Machinery
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White Papers
Interference-Resilient Information Exchange
Jan 2009
The authors study the problem of reliable information exchange in a multi-channel single-hop radio network subject to unpredictable interference. Each device begins the execution with a value that...
Provided by Massachusetts Institute of Technology
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White Papers
The Age of Gossip: Spatial Mean Field Regime
Jun 2009
Disseminating a piece of information, or updates for a piece of information, has been shown to benefit greatly from simple randomized procedures, sometimes referred to as gossiping, or epidemic...
Provided by Association for Computing Machinery
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White Papers
Aziala-Net: Deploying a Scalable Multi-Hop Wireless Testbed Platform for Research Purposes
May 2009
Aziala-net is a flexible and scalable experimental testbed for wireless multi-hop networks based on simple off-the-shelf hardware that is able to adapt to various research purposes. It is composed...
Provided by Association for Computing Machinery
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White Papers
End-to-End Adaptation Scheme for Ubiquitous Remote Experimentation
Oct 2007
Remote experimentation is an effective e-learning paradigm for supporting hands-on education using laboratory equipment at distance. The current trend is to enable remote experimentation in mobile...
Provided by Springer Science+Business Media
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White Papers
Network Coding and Media Streaming
Oct 2009
Network coding has recently emerged as an alternative to traditional routing algorithms in communication systems. In network coding, the network nodes combine the packets they receive before...
Provided by Academy Publisher
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White Papers
Network Coding: From Theory to Media Streaming
Jun 2009
The traditional multimedia coding and streaming architectures have been challenged in the recent years with emerging applications such as wireless low-power surveillance, multimedia sensor...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
EZ-Flow: Removing Turbulence in IEEE 802.11 Wireless Mesh Networks Without Message Passing
Dec 2009
Recent analytical and experimental work demonstrate that IEEE 802.11-based wireless mesh networks are prone to turbulence. Manifestations of such turbulence take the form of large buffer build-up...
Provided by Association for Computing Machinery
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White Papers
Achieving Linear Scaling With Interference Alignment
May 2009
Recent results have shown that interference alignment can achieve K/2 degrees of freedom in a K-user interference channel with time or frequency varying channel coefficients. For fixed number of...
Provided by University of California
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White Papers
Evolution and Market Share of Wireless Community Networks
Mar 2010
Wireless community networks that operate in the unlicensed spectrum have emerged as a low-cost alternative for providing high-speed wireless data services. By using Wi-Fi access points that are...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Gaussian Diamond Network With Adversarial Jammer
Apr 2010
In this paper the authors consider communication from a source to a destination over a wireless network with the help of a set of authenticated relays. They focus on a special "Diamond" network,...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
On the Fairness of Large CSMA Networks
Apr 2009
The authors characterize the fairness of decentralized medium access control protocols based on CSMA/CA, in large multi-hop wireless networks. In particular, they show that the widely observed...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Information Theoretic Operating Regimes of Large Wireless Networks
Sep 2009
In analyzing the point-to-point wireless channel, insights about two qualitatively different operating regimes - bandwidth- and power-limited - have proven indispensable in the design of good...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Tipover Stability Enhancement of Wheeled Mobile Manipulators Using an Adaptive Neuro-Fuzzy Inference Controller System
Jun 2009
In this paper an algorithm based on the adaptive neuro-fuzzy controller is provided to enhance the tip-over stability of mobile manipulators when they are subjected to predefined trajectories for...
Provided by Sharif University of Technology
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White Papers
Analytical Model of Connection Establishment Duration Calculation in Wireless Networks
Jun 2009
It is important to provide possibility of so called "Handover" for the mobile subscriber from GSM network to Wi-Fi network and back. To solve specified problem it is necessary to estimate...
Provided by World Academy of Science, Engineering and Technology
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White Papers
Performance Analysis of Some New CFAR Detectors Under Clutter
Jun 2011
In order to improve the radar's detection performance under Pearson distributed background clutter, the problem of designing CFAR detectors is studied in this paper. Three kinds of distributed...
Provided by Academy Publisher
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White Papers
On Data-Centric Trust Establishment in Ephemeral Ad Hoc Networks
Jan 2008
The authors argue that the traditional notion of trust as a relation among entities, while useful, becomes insufficient for emerging data-centric mobile ad hoc networks. In these systems, setting...
Provided by Carnegie Mellon University
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White Papers
A Mobile World of Security
Jul 2010
Mobile users are increasing fast in numbers, new types of services and applications become available, and new mobile systems (e.g., for intelligent transportation) emerge. Meanwhile, the need for...
Provided by EPFL
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White Papers
Game Theory Meets Network Security and Privacy
Apr 2011
This paper provides a structured and comprehensive overview of research on security and privacy in computer and communication networks that uses game-theoretic approaches. The authors present a...
Provided by University of Illinois
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White Papers
Modeling Low Voltage Power Line as a Data Communication Channel
Jun 2009
Power line communications may be used as a data communication channel in public and indoor distribution networks so that it does not require the installing of new cables. Industrial low voltage...
Provided by International Islamic University Malaysia
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White Papers
An Innovational Intermittent Algorithm in Networks-on-Chip (NOC)
Jun 2009
Every day human life experiences new equipments more automatic and with more abilities. So the need for faster processors doesn't seem to finish. Despite new architectures and higher frequencies,...
Provided by Islamic Azad University
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White Papers
A New Scheduling Algorithm Based on Traffic Classification Using Imprecise Computation
Jun 2009
Wireless channels are characterized by more serious bursty and location-dependent errors. Many packet scheduling algorithms have been proposed for wireless networks to guarantee fairness and delay...
Provided by World Academy of Science, Engineering and Technology
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White Papers
Simulation and Emulation of MIMO Wireless Baseband Transceivers
Nov 2009
The development of state-of-the-art wireless communication transceivers in semiconductor technology is a challenging process due to complexity and stringent requirements of modern communication...
Provided by ETH Zurich
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White Papers
A Real-Time Compressed Sensing-Based Personal Electrocardiogram Monitoring System
Jan 2011
Wireless Body Sensor Networks (WBSN) hold the promise to enable next-generation patient-centric mobile-cardiology systems. A WBSN-enabled ElectroCardioGram (ECG) monitor consists of wearable,...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Real-Time Compressed Sensing-Based Electrocardiogram Compression on Energy-Constrained Wireless Body Sensors
Mar 2011
Wireless Body Sensor Networks (WBSN) hold the promise to enable next-generation patient-centric tele-cardiology systems. A WBSN-enabled ElectroCardioGram (ECG) monitor consists of wearable,...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Valuable Detours: Least-Cost Anypath Routing
Sep 2010
In many networks, it is less costly to transmit a packet to any node in a set of neighbors than to one specific neighbor. This observation was previously exploited by opportunistic routing...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Compressed Sensing for Real-Time Energy-Efficient ECG Compression on Wireless Body Sensor Nodes
Mar 2011
Wireless Body Sensor Networks (WBSN) holds the promise to be a key enabling information and communications technology for next-generation patient-centric tele-cardiology or mobile cardiology...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Chebyshev Polynomial Approximation for Distributed Signal Processing
May 2011
Unions of graph Fourier multipliers are an important class of linear operators for processing signals defined on graphs. The authors present a novel method to efficiently distribute the...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Predictive Modeling-Based Data Collection in Wireless Sensor Networks
Dec 2007
The authors address the problem of designing practical, energy-efficient protocols for data collection in wireless sensor networks using predictive modeling. Prior work has suggested several...
Provided by Springer Science+Business Media
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White Papers
Target Localization Accuracy Using Wimax Radar Networks
May 2011
Scientists have explored that WiMAX has the potential to enhance the performance of the radar networks. With the idea of implementing MIMO (Multi-Input Multi-Output) communication technology for...
Provided by JATIT
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White Papers
A Novel Approach for Selecting an Optimal Number of Cell Site Locations in Varying Geographic Regions for Cellular Networks
Jun 2011
Facing the rapidly growing demand for mobile communication services and the limited available radio spectrum, a careful design of cellular networks in terms of coverage and capacity becomes of...
Provided by JATIT
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White Papers
Capacity Considerations in MIMO Systems and Impact of Transmit-Side Spacial Fading Correlation on the Performance of Non-orthogonal Space Time Codes
May 2010
High data rates are a primary concern for wireless system designers today. It is likely that future breakthroughs in wireless communications will be driven mainly by the demand for high data rate...
Provided by JATIT
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White Papers
A Distributed Topology Control Algorithm to Conserve Energy in Heterogeneous Wireless Mesh Networks
Jun 2009
A considerable amount of energy is consumed during transmission and reception of messages in a Wireless Mesh Network (WMN). Reducing per-node transmission power would greatly increase the network...
Provided by University of South Africa
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White Papers
Sensitivity of Small Disturbance Angle Stability to the System Parameters of Future Power Networks
Jun 2009
The incorporation of renewable energy sources for the sustainable electricity production is undertaking a more prominent role in electric power systems. Thus, it will be an indispensable incident...
Provided by Delft University of Technology
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White Papers
Inverting Wireless Collision Avoidance
Apr 2009
The authors describe grant-to-send, a novel collision avoidance algorithm for wireless mesh networks. Rather than announce packets it intends to send, a node using grant-to-send announces packets...
Provided by Stanford University
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White Papers
PRR Is Not Enough
Jul 2008
The authors study the effects of wireless channel burstiness on TCP. They measure TCP throughput over single-hop link traces from MIT's 802.11b Roofnet and Intel Berkeley's 802.15.4 Mirage...
Provided by Stanford University
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White Papers
Secure Friend Discovery in Mobile Social Networks
Mar 2011
Mobile social networks extend social networks in the cyberspace into the real world by allowing mobile users to discover and interact with existing and potential friends who happen to be in their...
Provided by University of Texas
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White Papers
Model-Driven Optimization of Opportunistic Routing
Jun 2011
Opportunistic routing aims to improve wireless performance by exploiting communication opportunities arising by chance. A key challenge in opportunistic routing is how to achieve good, predictable...
Provided by Association for Computing Machinery
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White Papers
Design Approach for VHDL and FPGA Implementation of Automotive Black Box Using CAN Protocol
Sep 2008
Modern automobile units include many microcontrollers and their number is growing continuously. Driver's comfort and safety is of utmost importance in today's heavy competitive world. The...
Provided by International Journal of Computer Science and Network Security
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White Papers
Basic Concepts of Interval Digital Signal Processing
Jun 2009
Interval mathematics has been used in Signal Processing as a tool for representing uncertainties that arise from finite numeric representation, limited precision sensors and the quantization...
Provided by Universidade Federal do Rio G. Norte
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White Papers
Synthesis for Optimal Two-Player Decentralized Control Over TCP Erasure Channels With State Feedback
Apr 2012
Recent advances in communication networks and VLSI have made it possible to provide services remotely. In fact, an increasing number of current services and future deployments, such as distributed...
Provided by Stanford University
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White Papers
An Explicit Solution for Optimal Two-Player Decentralized Control Over TCP Erasure Channels With State Feedback
Oct 2011
The authors develop an optimal controller synthesis algorithm for decentralized control problems where control actions are transmitted through TCP-like erasure channels. They consider a simple...
Provided by Stanford University
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White Papers
An Overview of Low-Power Techniques for Field-Programmable Gate Arrays
Sep 2009
This paper provides an overview of low-power techniques for Field-Programmable Gate Arrays (FPGAs). It covers system-level design techniques and device-level design techniques that have targeted...
Provided by Imperial College London
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White Papers
Traffic Grooming in Bidirectional WDM Ring Networks
Jul 2010
The authors study the minimization of ADMs (Add-Drop Multiplexers) in optical WDM bidirectional rings considering symmetric shortest path routing and all-to-all unitary requests. They precisely...
Provided by INRIA
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White Papers
Hardness and Approximation of Traffic Grooming
Apr 2009
Optical Wavelength Division Multiplexing (WDM) is today the most promising technology to accommodate the explosive growth of Internet and telecommunication traffic in wide-area, metro-area, and...
Provided by Reed Elsevier
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White Papers
Designing Hypergraph Layouts to GMPLS Routing Strategies
Feb 2009
All-Optical Label Switching (AOLS) is a new technology that performs packet forwarding without any Optical-Electrical-Optical (OEO) conversions. In this paper, the authors study the problem of...
Provided by INRIA
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White Papers
Locally Most Powerful Invariant Tests for the Properness of Quaternion Gaussian Vectors
Jan 2012
Previous works have addressed the second-order statistical characterization of quaternion random vectors, introducing different properness definitions, and presenting the Generalized Likelihood...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Generalized Likelihood Ratios for Testing the Properness of Quaternion Gaussian Vectors
Apr 2011
In a recent paper, the second-order statistical analysis of quaternion random vectors has shown that there exist two different kinds of quaternion widely linear processing, which are associated...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Detection of Spatially Correlated Gaussian Time Series
Oct 2010
This paper addresses the problem of deciding whether a set of realizations of a vector-valued time series with unknown temporal correlation are spatially correlated or not. For Wide Sense...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Properness and Widely Linear Processing of Quaternion Random Vectors
Jul 2010
In this paper, the second-order circularity of quaternion random vectors is analyzed. Unlike the case of complex vectors, there exist three different kinds of quaternion properness, which are...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Correlation Matching Approaches for Blind OSTBC Channel Estimation
Dec 2008
In this paper, the problem of blind channel estimation under Orthogonal Space-Time Block Coded (OSTBC) transmissions is solved by minimizing some distance measure between the theoretical and...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
On the Blind Identifiability of Orthogonal Space - Time Block Codes From Second-Order Statistics
Feb 2008
In this paper, the conditions for blind identifiability from Second-Order Statistics (SOS) of Multiple-Input Multiple-Output (MIMO) channels under Orthogonal Space-Time Block Coded (OSTBC)...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Interference Leakage Minimization for Convolutive MIMO Interference Channels
Mar 2012
An alternating optimization algorithm was recently proposed for the K-user Multiple-Input Multiple-Output (MIMO) interference channel. For flat-fading channels and feasible problems, this...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
The Locally Most Powerful Test for Multiantenna Spectrum Sensing With Uncalibrated Receivers
Mar 2012
Spectrum sensing is a key component of the Cognitive Radio (CR) paradigm. Among CR detectors, multi-antenna detectors are gaining popularity since they improve the detection performance and are...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Spatial Rank Estimation in Cognitive Radio Networks With Uncalibrated Multiple Antennas
Oct 2011
Spectrum sensing is a key component of the Cognitive Radio paradigm. Multi-antenna detectors can exploit different spatial features of primary signals in order to boost detection performance and...
Provided by Association for Computing Machinery
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White Papers
Testing Quaternion Properness: Generalized Likelihood Ratios and Locally Most Powerful Invariants
Sep 2011
This paper considers the problem of determining whether a quaternion random vector is proper or not, which is an important problem because the structure of the optimal linear processing depends on...
Provided by EURASIP
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White Papers
Multi-Sensor Beamsteering Based on the Asymptotic Likelihood for Colored Signals
May 2011
In this paper, the authors derive a maximum likelihood formula for beam-steering in a multi-sensor array. The impinging signal and noises are Wide Sense Stationary (WSS) time series with unknown...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Capacity Region of the Two-Way Multi-Antenna Relay Channel With Analog Tx-Rx Beamforming
Apr 2011
In this paper, the authors study the Multiple-Input Multiple-Output Two-Way Relay Channel (MIMO-TWRC) when the nodes use analog beam-forming. Following the Amplify-and-Forward (AF) strategy, the...
Provided by Universidad de Cantabria
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White Papers
Multiple-Channel Detection of a Gaussian Time Series Over Frequency-Flat Channels
Apr 2011
This paper addresses the problem of deciding whether a set of realizations of a vector-valued time series with unknown temporal correlation are spatially correlated or not. Specifically, the...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Analog Antenna Combining in Multiuser OFDM Systems: Beamforming Design and Power Allocation
Apr 2011
This paper consists in characterizing the capacity region of a broadcast system based on analog antenna combining and Orthogonal Frequency Division Multiplexing (OFDM). In particular, the authors...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Multiantenna Spectrum Sensing: The Case of Wideband Rank-One Primary Signals
Oct 2010
One of the key problems in Cognitive Radio (CR) is the detection of primary activity in order to determine which parts of the spectrum are available for opportunistic access. In this paper, the...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Capacity Region of the Multiantenna Gaussian Broadcast Channel With Analog Tx-Rx Beamforming
Jun 2010
In this paper, the authors characterize the capacity boundary of the two-user Multiple-Input Multiple-Output (MIMO) Broadcast Channel (BC) when the multi-antenna terminals use analog beam-forming...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Equal Gain MIMO Beamforming in the RF Domain for OFDM-WLAN Systems
Jun 2010
Equal Gain Beam-forming (EGB) schemes are typically applied in the baseband domain and hence require complex RF transceivers. In order to simplify the circuitry and energy consumption of the MIMO...
Provided by Dresden University of Technology
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White Papers
Equal-Phase Beamforming Architecture for RF-MIMO Antenna Systems
Jun 2010
This paper considers a novel Multiple-Input Multiple-Output (MIMO) architecture, which combines the signals in the Radio-Frequency (RF) domain. Unlike previous approaches, the proposed...
Provided by Universidad de Cantabria
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White Papers
A General Pre-FFT Criterion for MIMO-OFDM Beamforming
Jun 2010
In this paper, the authors propose a general beam-forming criterion for pre-FFT processing in Orthogonal Frequency Division Multiplexing (OFDM) systems with multiple transmit and receive antennas....
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Building a Web Platform for Learning Advanced Digital Communications Using a MIMO Testbed
Mar 2010
Society demands access to high capacity wireless communications and to the services that can be provided on top of them. To satisfy these demands, engineers are constantly developing new...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Multiantenna Spectrum Sensing: Detection of Spatial Correlation Among Time-Series With Unknown Spectra
Mar 2010
One of the key problems in Cognitive Radio (CR) is the detection of primary activity in order to determine which parts of the spectrum are available for opportunistic access. This detection task...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
A Kernel Canonical Correlation Analysis Algorithm for Blind Equalization of Oversampled Wiener Systems
Aug 2008
In this paper, the authors present an algorithm for blind equalization of Single-Input Multiple-Output (SIMO) nonlinear systems, in which each nonlinear channel is a Wiener system. The proposed...
Provided by Universidad de Cantabria
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White Papers
A Subspace Approach for Blind Estimation of Time-Varying Channels Under STBC Transmissions
May 2008
In this paper a new subspace method for blind estimation of time-varying channels under STBC transmissions has been proposed. Specifically, the time-varying MIMO channel has been deterministically...
Provided by Universidad de Cantabria
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White Papers
Correlation and Kullback Matching Approaches: Application to Blind Channel Estimation in OSTBC Systems
May 2008
In many practical parameter estimation problems, the statistical properties of the sources can be exploited to improve the quality of the estimates. In this paper, the authors consider the...
Provided by Universidad de Cantabria
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White Papers
Optimal MIMO Transmission Schemes With Adaptive Antenna Combining in the RF Path
May 2008
In this paper, the authors study space-time coding schemes for a novel MIMO transceiver which performs adaptive signal combining in Radio-Frequency (RF). The limitations of the RF circuitry make...
Provided by Dresden University of Technology
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White Papers
A New Subspace Algorithm for Blind Channel Estimation in Broadband Space-Time Block Coded Communication Systems
May 2008
In this paper a new subspace method for blind estimation of frequency-selective channels is proposed. Specifically, the authors consider the case of broadband Space-Time Block Coded (STBC)...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Deterministic MIMO Channel Order Estimation Based on Canonical Correlation Analysis
May 2008
Channel order estimation is a critical step in blind channel identification/equalization algorithms. In this paper, a new criterion for channel order estimation of Multiple-Input Multiple-Output...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Multiple-Channel Signal Detection Using the Generalized Coherence Spectrum
Mar 2008
Recently, a generalization of the Magnitude Squared Coherence (MSC) spectrum for more than two random processes has been proposed. The Generalized MSC (GMSC) spectrum definition, which is based on...
Provided by Universidad de Cantabria
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White Papers
A Generalization of the Magnitude Squared Coherence Spectrum for More Than Two Signals: Definition, Properties and Estimation
Mar 2008
The coherence spectrum is a well-known measure of the linear statistical relationship between two time series. In this paper, the authors extend this concept to several processes and define the...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
SoS-Based Blind Channel Estimation Under Space-Time Block Coded Transmissions
Jun 2007
In this paper, a new blind channel estimation technique for Multiple-Input Multiple-Output (MIMO) Space-Time Block Coded (STBC) systems is proposed. The technique is solely based on Second-Order...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Blind Identification of MIMO-OSTBC Channels Combining Second and Higher Order Statistics
Jan 2012
It has been recently shown that some Multiple-Input Multiple-Output (MIMO) channels under Orthogonal Space-Time Block Coding (OSTBC) transmissions can not be unambiguously identified by only...
Provided by Universidad de Cantabria
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White Papers
A Sufficient Condition for Blind Identifiability of MIMO-OSTBC Channels Based on Second Order Statistics
Jan 2012
In this paper the conditions for blind identifiability of Multiple-Input Multiple-Output (MIMO) channels under Orthogonal Space-Time Block Coded (OSTBC) transmissions are studied. Specifically the...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Distributed Target Tracking Under Realistic Network Conditions
Sep 2011
Distributed target tracking has been a widely studied problem for different applications, more recently considering distributed particle filter techniques for Wireless Sensor Networks (WSNs)....
Provided by University of London
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White Papers
WiSE-MNet: An Experimental Environment for Wireless Multimedia Sensor Networks
Sep 2011
The authors propose a simulation environment for networks for Wireless Multimedia Sensor Networks (WMSNs), i.e. networks with sensors capturing complex vectorial data, such as for example video...
Provided by University of London
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