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Mission Statement
TechRepublic's ITPapers is the Web's largest library of free technical IT white papers, webcasts, and case studies. Covering IT categories including Data Management, IT Management, Networking, Communications, Enterprise Applications, Storage, Security and much more, TechRepublic's White Paper Directory is the best source for technical white papers and IT information.
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White Papers
Control of Multiple Networked Passive Plants With Delays and Data Dropouts
Oct 2009
The primary goal of this paper is to develop reliable wireless control networks,. These networks typically consist of distributed-wireless sensors, actuators and controllers which communicate with...
Provided by AACC
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White Papers
Dynamic Connectivity and Packet Propagation Delay in ALOHA Wireless Networks
Sep 2011
The authors consider an ad hoc network which uses multihop and slotted ALOHA for its MAC contention. They then formulate the minimum time required for a packet to reach the destination from the...
Provided by University of Notre Dame
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White Papers
On the End-to-End Delay Performance of Spatially Correlated Wireless Line Networks
Sep 2011
The analytical end-to-end (e2e) performance of a wireless multihop network is largely unknown, because of the interconnections between several factors involved. Customarily, the nodes are often...
Provided by University College London
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White Papers
Parameter Identification in Model Based Networked Control Systems Using Kalman Filters
Jun 2009
The applicability of Model Based Networked Control Systems (MB-NCS) is often limited by the inexact knowledge of the dynamics of the system being controlled. On-line identification of system...
Provided by University of Notre Dame
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White Papers
Passivity-Based Design Of Wireless Networked Control Systems Subject to Time-Varying Delays
Mar 2010
Real-life cyber-physical systems, such as automotive vehicles, building automation systems, and groups of unmanned vehicles are monitored and controlled by networked control systems. The overall...
Provided by Vanderbilt University
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White Papers
A Delay-Minimizing Routing Strategy for Wireless Multi-Hop Networks
May 2009
The authors consider a network where each route comprises a backlogged source, a number of relays and a destination at a finite distance. The locations of the sources and the relays are...
Provided by University of California
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White Papers
A Low-Delay MAC Solution for MIMO Ad Hoc Networks
Sep 2008
Beamforming is regarded as a key element for multi-antenna ad hoc networks. However, it cannot simultaneously provide the omni-directional and long-range coverage required by broadcast...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Network Coding Meets MIMO
Nov 2007
In this paper, MIMO techniques are applied to network coding in order to exploit the spatial diversity inherent in packet combining. This is possible because network coding and MIMO solve similar...
Provided by University of Padova
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White Papers
Physical Layer Approximations for Cross - Layer Performance Analysis in MIMO-BLAST Ad Hoc Networks
Dec 2007
In this paper, the authors consider a MAC protocol for ad hoc networks where nodes are equipped with multiple antennas, and communications are spatially multiplexed using the Bell labs LAyered...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
On Gain Asymmetry and Broadcast Efficiency in MIMO Ad Hoc Networks
Jan 2008
In this paper, the problem of broadcast in ad hoc networks with smart antennas in a general propagation scenario is investigated. The conventional models proposed in the literature are surveyed...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Spatial Multiplexing in Random Wireless Networks
Apr 2010
The authors consider a network of transmitters, each with a receiver at a fixed distance, and locations drawn independently according to a homogeneous Poisson Point Process (PPP). The transmitters...
Provided by University of California
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White Papers
Information Efficiency and Transmission Range Optimization for Coded MIMO FH-CDMA Ad Hoc Networks in Time-Varying Environments
Jan 2010
Optimization of the transmission range in terms of maximizing information efficiency is studied in this paper for Mobile Ad hoc NETworks (MANETs) with Frequency-Hopped (FH) CDMA and multiple...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Channel Diversity in Random Wireless Networks
May 2010
The goal of this paper is to explore the benefits of channel diversity in wireless ad hoc networks. The authors' model is that of a Poisson point process of transmitters, each with a receiver at a...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Regularized Channel Distribution Inversion (RCDI) and Parameterization in the MIMO Broadcast Channel
Jan 2010
The multi-user Multiple-Input Multiple-Output (MIMO) wireless broadcast channel sum capacity is achieved using non-linear Dirty-Paper Coding (DPC) based on accurate Channel State Information (CSI)...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Covariance Based Signaling and Feedback Data Parameterization for the TimeVarying MIMO Broadcast Channel
Apr 2010
Linear precoding (beamforming) techniques that maximize the sum rate in the multi-antenna broadcast channel often suffer severe performance degradation when the channel state information at the...
Provided by University of California
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White Papers
Reduced-Feedback Linear Precoding With Stable Performance for the Time-Varying MIMO Broadcast Channel
Nov 2008
This paper explores the performance of a multiple-input multiple-output broadcast channel where both the transmitter and receivers have outdated channel knowledge due to node motion or other...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Instantaneous and Average Rate Maximization in MIMO Multiple-Access Channels (MAC) With Linear Processing
Jan 2010
Linear precoding (beamforming) techniques provide simple processing methods with good performance at reduced signaling complexity compared with nonlinear precoding schemes. The beamforming...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
High Availability for SIP: Solutions and Real-Time Measurement Performance Evaluation
Feb 2010
SIP is rapidly becoming a standard for service integration within a variety of wireless and wireline networks. In this regard high availability, reliability and redundancy are key factors for any...
Provided by University of the Aegean
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White Papers
Roomba MADNeT: A Mobile Ad-Hoc Delay Tolerant Network Testbed
Nov 2007
The authors have built a Mobile, Ad-hoc, Delay tolerant, Network Testbed (MADNeT). Their testbed is geared towards enabling the exploration of highly disconnected networks whose nodes must store...
Provided by Columbia University
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White Papers
The Time-Correlated Update Problem
Aug 2007
Recent advances in the fields of sensor networks and mobile robotics have provided the means to place monitoring/sensing equipment in an increasingly wide variety of environments - a significant...
Provided by Columbia University
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White Papers
Teaching Operating Systems Using Android
Mar 2012
The computing landscape is shifting towards mobile devices. To learn about operating systems, it is increasingly important for students to gain hands-on kernel programming experience in these...
Provided by Association for Computing Machinery
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White Papers
Cells: A Virtual Mobile Smartphone Architecture
Oct 2011
Smartphones are increasingly ubiquitous, and many users carry multiple phones to accommodate work, personal, and geographic mobility needs. The authors present Cells, a virtualization architecture...
Provided by Association for Computing Machinery
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White Papers
New Directions for Self-Destructing Data Systems
Aug 2011
This paper seeks to advance the state of the art in practical self-destructing data systems that secure sensitive data from disclosure in the highly mobile, social-networked, cloud-computing...
Provided by University of Washington
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White Papers
Analysis and Optimization on Jamming-Resistant Collaborative Broadcast in Large-Scale Networks
Dec 2010
Uncoordinated Frequency Hopping (UFH) is a viable anti-jamming solution without dependency on pre-shared secret keys, which nonetheless suffers from low communication efficiency. The Collaborative...
Provided by Xiamen University
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White Papers
Defending DSSS-Based Broadcast Communication Against Insider Jammers Via Delayed Seed-Disclosure
Jun 2010
Spread spectrum techniques such as Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping (FH) have been commonly used for anti-jamming wireless communication. However, traditional spread...
Provided by North Carolina State University
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White Papers
USD-FH: Jamming-Resistant Wireless Communication Using Frequency Hopping With Uncoordinated Seed Disclosure
Apr 2010
Spread spectrum techniques (e.g., Frequency Hopping (FH), Direct Sequence Spread Spectrum (DSSS)) have been widely used for anti-jamming wireless communications. Such techniques require that...
Provided by North Carolina State University
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White Papers
Transport Capacity and Connectivity of Cognitive Radio Networks With Outage Constraint
Apr 2010
In this paper, the authors study two basic properties, capacity and connectivity, of Cognitive Radio networks. Their goal is to quantitatively characterize the relationship and tradeoff among key...
Provided by North Carolina State University
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White Papers
Authenticating Primary Users' Signals in Cognitive Radio Networks Via Integrated Cryptographic and Wireless Link Signatures
Apr 2010
To address the increasing demand for wireless bandwidth, Cognitive Radio Networks (CRNs) have been proposed to increase the efficiency of channel utilization; they enable the sharing of channels...
Provided by North Carolina State University
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White Papers
Distributed Network Decomposition: A Probabilistic Greedy Approach
Jan 2010
In this paper, the authors propose a novel distributed network decomposition algorithm with the aid of the factor graph model and the max-product algorithm, which aims to achieve minimum cut...
Provided by North Carolina State University
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White Papers
Towards Efficient Designs for In-Network Computing With Noisy Wireless Channels
Aug 2009
In this paper, the authors study distributed function computation in a noisy multi-hop wireless network, in which n nodes are uniformly and independently distributed in a unit square. Each node...
Provided by North Carolina State University
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White Papers
Randomized Differential DSSS: Jamming-Resistant Wireless Broadcast Communication
Jun 2009
Jamming resistance is crucial for applications where reliable wireless communication is required. Spread spectrum techniques such as Frequency Hopping Spread Spectrum (FHSS) and Direct Sequence...
Provided by North Carolina State University
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White Papers
Structured Variational Methods for Distributed Inference in Wireless Ad Hoc and Sensor Networks
Jan 2009
In this paper, a variational message passing framework is proposed for Markov random fields, which is computationally more efficient and admits wider applicability compared to the belief...
Provided by North Carolina State University
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White Papers
Finding the K Largest Metrics in a Noisy Broadcast Network
Sep 2008
How to perform reliable computation among distributed nodes through noisy communication is a critical issue for emerging wireless networks. In particular, noisy channels impose challenges to...
Provided by University of Tennessee
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White Papers
Continuous-Model Communication Complexity With Application in Distributed Resource Allocation in Wireless Ad Hoc Networks
Aug 2008
Distributed resource allocation is an important problem in wireless ad hoc networks, in which there is no centralized scheduler and the resource allocation is carried out in a distributed way....
Provided by North Carolina State University
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White Papers
Collaborative Quickest Detection in Adhoc Networks With Delay Constraint - Part I: Two-Node Network
Dec 2007
Collaborative quickest detection is used to detect a certain distribution change in an adhoc network, in which there is no data fusion center and local decisions need to be made at all nodes. In...
Provided by North Carolina State University
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White Papers
Collaborative Quickest Detection in Adhoc Networks With Delay Constraint -Part II: Multi-Node Network
Dec 2007
In the first part of this two-part paper, the authors initiate the study of collaborative quickest detection in an adhoc setting for a simple two-node scenario. In this part, they extend their...
Provided by University of Tennessee
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White Papers
Quickest Spectrum Sensing in Cognitive Radio
Jan 2008
Quickest detection is applied to frequency spectrum sensing in cognitive radio systems. Distribution change in frequency domain is detected for vacating secondary radio networks from licensed...
Provided by North Carolina State University
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White Papers
Distributed Estimation in Wireless Sensor Networks Via Variational Message Passing
Feb 2008
In this paper, a variational message passing framework is proposed for Markov random fields. Analogous to the traditional belief propagation algorithm, variational message passing is performed by...
Provided by Princeton University
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White Papers
LADA Algorithms: Performance Lower Bound and Cluster-Based Variant
Sep 2007
The observation that certain non-reversible chains lifted from reversible ones mix substantially faster than the original chains, has motivated the authors' recent work, where a Location-Aided...
Provided by North Carolina State University
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White Papers
Lifetime Maximization in Wireless Sensor Network Using Cross Layer Design: A Design Review
Jan 2009
In the authors' paper, they consider the comparison performance of wireless sensor network to optimize the event detection and TDMA schemes using cross layer interaction. They consider the...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Optimal Power Allocation for Secondary Users in Cognitive Relay Networks
Dec 2010
The authors consider a Cognitive Relay Network (CRN) where the Secondary Users (SUs) are involved as cooperative relays in a Primary User's (PU) communication. To avoid generating interference to...
Provided by Nanyang Technological University
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White Papers
Performance Analysis of Cognitive Radio Spectrum Access With Prioritized Traffic
Jan 2011
Dynamic Spectrum Access (DSA) is an important design aspect for the cognitive radio networks. Most of the existing DSA schemes are to govern the unlicensed user (i.e., secondary user) traffic in a...
Provided by Nanyang Technological University
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White Papers
Hierarchical Coalition Formation Game of Relay Transmission in IEEE 802.16m
Feb 2011
One of the main features of IEEE 802.16m is the relay transmission which could not only extend the service coverage, but also improve the Quality-of-Service (QoS) to the mobile stations. In this...
Provided by University of Oslo
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White Papers
Dynamic Bandwidth Allocation Under Uncertainty in Cognitive Radio Networks
Jul 2011
The authors consider the problem of dynamic bandwidth allocation among different service classes under uncertainty in cognitive radio networks. In such networks, the secondary users compete for...
Provided by Nanyang Technological University
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White Papers
On Hierarchical Cooperation Formation in Mobile Infostation Networks
Jul 2011
Mobile infostation networks which achieve content distribution by exploiting the opportunistic contact among Mobile Users (MUs) and Access Points (APs) have attracted a lot of attention in the...
Provided by Nanyang Technological University
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White Papers
Payoff Allocation of Service Coalition in Wireless Mesh Network: A Cooperative Game Perspective
Jul 2011
In Wireless Mesh Network (WMN), multiple Service Providers (SPs) can cooperate to share resources (e.g., relay nodes and spectrum), to serve their collective subscribed customers for better...
Provided by Nanyang Technological University
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White Papers
An Interference Aware Distributed Resource Management Scheme for CDMA-Based Wireless Mesh Backbone
Dec 2007
In this paper, with a cross-layer design principle, the authors propose an interference aware distributed resource management scheme for a Code-Division Multiple Access (CDMA)-based wireless mesh...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Voice Service Capacity Analysis for Cognitive Radio Networks
Jan 2010
In this paper, Quality-of-Service (QoS) provisioning for voice service in cognitive radio networks is considered. As voice traffic is sensitive to delay, the presence of primary users and the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Novel Spectrum Scheduling Scheme for Multi-Channel Cognitive Radio Network and Performance Analysis
Jan 2011
In this paper, the authors develop an opportunistic spectrum scheduling scheme for multi-channel cognitive radio networks. In the proposed scheme, the primary user activity and channel quality...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
DelQue: A Socially-Aware Delegation Query Scheme in Delay Tolerant Networks
Oct 2010
In Delay Tolerant Networks (DTNs), information search is an important topic, which has not been widely investigated yet. Recently, pervasive and ubiquitous computing scenarios are pushing...
Provided by Nanyang Technological University
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White Papers
Secure Multicast Key Distribution for Mobile Adhoc Networks
Mar 2010
Many emerging applications in mobile adhoc networks involve group-oriented communication. Multicast is an efficient way of supporting group oriented applications, mainly in mobile environment with...
Provided by Avinashilingam University for Women
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White Papers
Strong Stochastic Stability for Dynamic Source Routing
Aug 2007
Node movement in a Mobile Ad-Hoc Network (MANET) simulation is defined by the mobility model. To ensure reliable simulation results, many research papers have investigated the stability (or...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Traffic Density Model for Radio Overlapping in Urban Vehicular Ad Hoc Networks
Jul 2011
Vehicular traffic density is a key factor in determining the behavior of radio overlapping and thus impacts performance of data and safety message communication in Vehicular Ad hoc Networks...
Provided by University of Sydney
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White Papers
Energy Efficient Monitoring for Intrusion Detection in Battery-Powered Wireless Mesh Networks
May 2011
Wireless Mesh Networks (WMN) are easy-to-deploy, low cost solutions for providing networking and internet services in environments with no network infrastructure, e.g., disaster areas and...
Provided by Texas A&M University
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White Papers
TMAC: Timestamp-Ordered MAC for CSMA/CA Wireless Mesh Networks
May 2011
The authors propose TMAC, a timestamp-ordered MAC protocol for Wireless Mesh Networks (WMNs). TMAC extends CSMA/CA by scheduling data packets based on their age. Prior to transmitting a data...
Provided by University of Waterloo
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White Papers
MAC-Layer Active Dropping for Real-Time Video Streaming in IEEE 802.16 Networks
Mar 2010
This paper introduces a MAC-layer Active Dropping (AD) scheme for achieving effective resource utilization and maintaining application-level quality of services in real-time video streaming over...
Provided by University of Waterloo
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White Papers
Chaotic Maps: A Tool to Enhance the Performance of OFDM Systems
Aug 2009
This paper presents a chaotic interleaving approach for efficient data transmission with Orthogonal Frequency Division Multiplexing (OFDM) over fading channels. The binary data is interleaved with...
Provided by Menoufia University
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White Papers
A Performance Comparison of Virtual Backbone Formation Algorithms for Wireless Mesh Networks
Aug 2009
Currently wireless networks are dominant by star topology paradigm. Its natural the evolution is towards wireless mesh multi-hop networks. This paper compares the performance of several algorithms...
Provided by Universidad de Alcalá
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White Papers
Adaptive Modulation for OFDM Systems
Aug 2009
The goal for the Fourth Generation (4G) of mobile communications system is to seamlessly integrate a wide variety of communication services such as high-speed data, video and multimedia traffic as...
Provided by Multimedia University
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White Papers
Synthesis of Unequally Spaced Antenna Arrays by a New Differential Evolutionary Algorithm
Apr 2009
The Differential Evolution (DE) algorithm with a new differential mutation base strategy, namely best of random, is applied to the synthesis of unequally spaced antenna arrays. In the best of...
Provided by National University of Singapore
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White Papers
A Fuzzy-Based Mobility Prediction in the IEEE 802.16e
Apr 2009
Intersystem mobility having no awkward transitions or indications of disparity, roaming across wireless access networks is one of the main features of mobile WiMAX. In this paper, the authors...
Provided by International Islamic University Malaysia
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White Papers
Energy Detection Based Spectrum Sensing for Sensing Error Minimization in Cognitive Radio Networks
Apr 2009
In this paper, the authors investigate an optimization of threshold level with energy detection to improve the spectrum sensing performance. Determining threshold level to minimize spectrum...
Provided by Seoul National University
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White Papers
An Optimal Temporally Expressive Planner: Initial Results and Application to P2P Network Optimization
Jun 2009
Temporally expressive planning, an important class of temporal planning, has attracted much attention lately. Temporally expressive planning is difficult; few existing planners can solve them, as...
Provided by Washington University in St. Louis
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White Papers
A Swarm Algorithm for a Self-Structured P2P Information System
Sep 2009
This paper introduces Antares, a bio-inspired algorithm for the construction of a decentralized and self-organized P2P information system in computational grids. This algorithm exploits the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Towards a Framework for Group-Centric Secure Collaboration
Oct 2009
The concept of groups is a natural aspect of most collaboration scenarios. Group-centric Secure Information Sharing models (g-SIS) have been recently proposed in which users and objects are...
Provided by George Mason University
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White Papers
Taming Information-Stealing Smartphone Applications (on Android)
Apr 2011
Smartphones have been becoming ubiquitous and mobile users are increasingly relying on them to store and handle personal in-formation. However, recent studies also reveal the disturbing fact that...
Provided by NC State University
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Case Studies
IBM Helps Provide High-Availability Telepayment for the Direction Générale Des Finances Publiques
Sep 2008
Responsible for collecting taxes (such as income taxes, property taxes, habitation taxes, and business taxes), the Direction Générale des Finances Publiques (DGFiP) leads the French Treasury. It...
Provided by IBM
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Case Studies
ADI Logistics Moves to Ruckus Smart WLAN Meshing to Increase Warehouse Efficiency
Oct 2008
ADI provides over one hundred manufacturers, importers and distributors with distribution, storage, freight and trucking services throughout the United States - serving a wide range of markets,...
Provided by Ruckus Wireless
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Case Studies
Holland Christian Schools Make the Move to 802.11n Smart Wireless LANs
Nov 2008
Going through a $27 million renovation and expansion of its facilities, Holland Christian Schools needed a faster and better wireless infrastructure. But as user densities grew and applications...
Provided by Ruckus Wireless
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Case Studies
Douglas County Discovers How to Migrate School District to 802.11n Without Going Broke or Crazy
Jan 2010
Douglas County School District (DCSD) had a choice between building wired labs to support state standardized Measured Achievement Progress (MAP) testing or going all wireless. DCSD's ultimate goal...
Provided by Ruckus Wireless
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Case Studies
Delta School District Enriches Student Experience and Staff Efficiency With Smarter Wireless LANs
Oct 2008
Delta needed to deploy a reliable wireless infrastructure in each of its schools to accommodate a variety of applications, such as supporting small-footprint laptops provided to special-need...
Provided by Ruckus Wireless
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Case Studies
KPN - Holland's Largest Wi-Fi Hotspot Provider - Continues to Connect Millions Each Year Via Proxim Wi-Fi
Dec 2009
KPN Hotspots B.V., Holland's largest provider of Wi-Fi hotspots, has partnered with Proxim to deliver Wi-Fi hotspot services for nearly three years. KPN Hotspots B.V., Holland's largest provider...
Provided by Proxim Wireless
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Case Studies
Sunrise Wireless Deploys Proxim Wireless' Backhaul, WiMAX and Wi-Fi to Unwire the San Francisco Bay
May 2010
Sunrise Wireless, a pioneer in the development of wireless broadband systems for the maritime industry, has deployed Proxim Wireless' equipment to unwire the San Francisco Bay. Sunrise Wireless...
Provided by Proxim Wireless
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Case Studies
Aqaba Water Company Selects Proxim Wireless for Automated SCADA Network
Apr 2010
The Aqaba Water Company (AWC), the official water treatment and management company of Aqaba-Jordan, needed a high performance network that could cost-effectively connect the many components of...
Provided by Proxim Wireless
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Case Studies
Reliable Wi-Fi Network in the Heart of Herzliya
Mar 2011
Magalacom looked towards the leader in wireless networking, HauteSpot Networks. Due to a very limited number of available unlicensed wireless bands, Israel's 2.4 GHz Wi-Fi is very congested. The...
Provided by HauteSpot Networks
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Case Studies
High Definition Real-Time
Mar 2011
Northridge Cooperative Homes is a $55 million non-profit corporation set up for the purpose of providing affordable ownership housing for its members. Many mature trees dotted the landscape,...
Provided by HauteSpot Networks
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White Papers
From Wireless Sensor Networks Towards Cyber Physical Systems
Mar 2011
In the past two decades, a lot of research activities have been dedicated to the fields of Mobile Ad hoc NETwork (MANET) and Wireless Sensor Networks (WSN). More recently, the Cyber Physical...
Provided by Elsevier
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White Papers
Design and Analysis of Mobility-Aware Clustering Algorithms for Wireless Mesh Networks
Dec 2010
One of the major concerns in Wireless Mesh Networks (WMNs) is the radio resource utilization efficiency, which can be enhanced by efficiently managing the mobility of users. To achieve this, the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Region-Based Location-Service-Management Protocol for VANETs
Feb 2010
The efficiency by which a node of a Vehicular Ad hoc NETwork (VANET) can route messages to destinations heavily depends on the VANET's ability to keep track of the locations of its nodes...
Provided by Institute of Electrical and Electronics Engineers
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Podcasts
Delivering Secure Content to Remote Mobile Users: How to Build a CDN
Jan 2011
In this podcast, the speaker, F5 Networks Product Manager, explains how F5 BIG-IP WebAccelerator can be deployed symmetrically to create an enterprise CDN (eCDN) that gives enterprise web sites...
Provided by F5 Networks
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White Papers
On Gain Asymmetry and Broadcast Efficiency in MIMO Ad Hoc Networks
Jan 2008
In this paper, the problem of broadcast in ad hoc networks with smart antennas in a general propagation scenario is investigated. The conventional models proposed in the literature are surveyed...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Spatial Multiplexing in Random Wireless Networks
Apr 2010
The authors consider a network of transmitters, each with a receiver at a fixed distance, and locations drawn independently according to a homogeneous Poisson Point Process (PPP). The transmitters...
Provided by University of California
-
White Papers
Information Efficiency and Transmission Range Optimization for Coded MIMO FH-CDMA Ad Hoc Networks in Time-Varying Environments
Jan 2010
Optimization of the transmission range in terms of maximizing information efficiency is studied in this paper for Mobile Ad hoc NETworks (MANETs) with Frequency-Hopped (FH) CDMA and multiple...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Channel Diversity in Random Wireless Networks
May 2010
The goal of this paper is to explore the benefits of channel diversity in wireless ad hoc networks. The authors' model is that of a Poisson point process of transmitters, each with a receiver at a...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Regularized Channel Distribution Inversion (RCDI) and Parameterization in the MIMO Broadcast Channel
Jan 2010
The multi-user Multiple-Input Multiple-Output (MIMO) wireless broadcast channel sum capacity is achieved using non-linear Dirty-Paper Coding (DPC) based on accurate Channel State Information (CSI)...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Covariance Based Signaling and Feedback Data Parameterization for the TimeVarying MIMO Broadcast Channel
Apr 2010
Linear precoding (beamforming) techniques that maximize the sum rate in the multi-antenna broadcast channel often suffer severe performance degradation when the channel state information at the...
Provided by University of California
-
White Papers
Reduced-Feedback Linear Precoding With Stable Performance for the Time-Varying MIMO Broadcast Channel
Nov 2008
This paper explores the performance of a multiple-input multiple-output broadcast channel where both the transmitter and receivers have outdated channel knowledge due to node motion or other...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Instantaneous and Average Rate Maximization in MIMO Multiple-Access Channels (MAC) With Linear Processing
Jan 2010
Linear precoding (beamforming) techniques provide simple processing methods with good performance at reduced signaling complexity compared with nonlinear precoding schemes. The beamforming...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
High Availability for SIP: Solutions and Real-Time Measurement Performance Evaluation
Feb 2010
SIP is rapidly becoming a standard for service integration within a variety of wireless and wireline networks. In this regard high availability, reliability and redundancy are key factors for any...
Provided by University of the Aegean
-
White Papers
Roomba MADNeT: A Mobile Ad-Hoc Delay Tolerant Network Testbed
Nov 2007
The authors have built a Mobile, Ad-hoc, Delay tolerant, Network Testbed (MADNeT). Their testbed is geared towards enabling the exploration of highly disconnected networks whose nodes must store...
Provided by Columbia University
-
White Papers
The Time-Correlated Update Problem
Aug 2007
Recent advances in the fields of sensor networks and mobile robotics have provided the means to place monitoring/sensing equipment in an increasingly wide variety of environments - a significant...
Provided by Columbia University
-
White Papers
Teaching Operating Systems Using Android
Mar 2012
The computing landscape is shifting towards mobile devices. To learn about operating systems, it is increasingly important for students to gain hands-on kernel programming experience in these...
Provided by Association for Computing Machinery
-
White Papers
Cells: A Virtual Mobile Smartphone Architecture
Oct 2011
Smartphones are increasingly ubiquitous, and many users carry multiple phones to accommodate work, personal, and geographic mobility needs. The authors present Cells, a virtualization architecture...
Provided by Association for Computing Machinery
-
White Papers
New Directions for Self-Destructing Data Systems
Aug 2011
This paper seeks to advance the state of the art in practical self-destructing data systems that secure sensitive data from disclosure in the highly mobile, social-networked, cloud-computing...
Provided by University of Washington
-
White Papers
Analysis and Optimization on Jamming-Resistant Collaborative Broadcast in Large-Scale Networks
Dec 2010
Uncoordinated Frequency Hopping (UFH) is a viable anti-jamming solution without dependency on pre-shared secret keys, which nonetheless suffers from low communication efficiency. The Collaborative...
Provided by Xiamen University
-
White Papers
Defending DSSS-Based Broadcast Communication Against Insider Jammers Via Delayed Seed-Disclosure
Jun 2010
Spread spectrum techniques such as Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping (FH) have been commonly used for anti-jamming wireless communication. However, traditional spread...
Provided by North Carolina State University
-
White Papers
USD-FH: Jamming-Resistant Wireless Communication Using Frequency Hopping With Uncoordinated Seed Disclosure
Apr 2010
Spread spectrum techniques (e.g., Frequency Hopping (FH), Direct Sequence Spread Spectrum (DSSS)) have been widely used for anti-jamming wireless communications. Such techniques require that...
Provided by North Carolina State University
-
White Papers
Transport Capacity and Connectivity of Cognitive Radio Networks With Outage Constraint
Apr 2010
In this paper, the authors study two basic properties, capacity and connectivity, of Cognitive Radio networks. Their goal is to quantitatively characterize the relationship and tradeoff among key...
Provided by North Carolina State University
-
White Papers
Authenticating Primary Users' Signals in Cognitive Radio Networks Via Integrated Cryptographic and Wireless Link Signatures
Apr 2010
To address the increasing demand for wireless bandwidth, Cognitive Radio Networks (CRNs) have been proposed to increase the efficiency of channel utilization; they enable the sharing of channels...
Provided by North Carolina State University
-
White Papers
Distributed Network Decomposition: A Probabilistic Greedy Approach
Jan 2010
In this paper, the authors propose a novel distributed network decomposition algorithm with the aid of the factor graph model and the max-product algorithm, which aims to achieve minimum cut...
Provided by North Carolina State University
-
White Papers
Towards Efficient Designs for In-Network Computing With Noisy Wireless Channels
Aug 2009
In this paper, the authors study distributed function computation in a noisy multi-hop wireless network, in which n nodes are uniformly and independently distributed in a unit square. Each node...
Provided by North Carolina State University
-
White Papers
Randomized Differential DSSS: Jamming-Resistant Wireless Broadcast Communication
Jun 2009
Jamming resistance is crucial for applications where reliable wireless communication is required. Spread spectrum techniques such as Frequency Hopping Spread Spectrum (FHSS) and Direct Sequence...
Provided by North Carolina State University
-
White Papers
Structured Variational Methods for Distributed Inference in Wireless Ad Hoc and Sensor Networks
Jan 2009
In this paper, a variational message passing framework is proposed for Markov random fields, which is computationally more efficient and admits wider applicability compared to the belief...
Provided by North Carolina State University
-
White Papers
Finding the K Largest Metrics in a Noisy Broadcast Network
Sep 2008
How to perform reliable computation among distributed nodes through noisy communication is a critical issue for emerging wireless networks. In particular, noisy channels impose challenges to...
Provided by University of Tennessee
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White Papers
Continuous-Model Communication Complexity With Application in Distributed Resource Allocation in Wireless Ad Hoc Networks
Aug 2008
Distributed resource allocation is an important problem in wireless ad hoc networks, in which there is no centralized scheduler and the resource allocation is carried out in a distributed way....
Provided by North Carolina State University
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White Papers
Collaborative Quickest Detection in Adhoc Networks With Delay Constraint - Part I: Two-Node Network
Dec 2007
Collaborative quickest detection is used to detect a certain distribution change in an adhoc network, in which there is no data fusion center and local decisions need to be made at all nodes. In...
Provided by North Carolina State University
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White Papers
Collaborative Quickest Detection in Adhoc Networks With Delay Constraint -Part II: Multi-Node Network
Dec 2007
In the first part of this two-part paper, the authors initiate the study of collaborative quickest detection in an adhoc setting for a simple two-node scenario. In this part, they extend their...
Provided by University of Tennessee
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White Papers
Quickest Spectrum Sensing in Cognitive Radio
Jan 2008
Quickest detection is applied to frequency spectrum sensing in cognitive radio systems. Distribution change in frequency domain is detected for vacating secondary radio networks from licensed...
Provided by North Carolina State University
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White Papers
Distributed Estimation in Wireless Sensor Networks Via Variational Message Passing
Feb 2008
In this paper, a variational message passing framework is proposed for Markov random fields. Analogous to the traditional belief propagation algorithm, variational message passing is performed by...
Provided by Princeton University
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White Papers
LADA Algorithms: Performance Lower Bound and Cluster-Based Variant
Sep 2007
The observation that certain non-reversible chains lifted from reversible ones mix substantially faster than the original chains, has motivated the authors' recent work, where a Location-Aided...
Provided by North Carolina State University
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White Papers
Lifetime Maximization in Wireless Sensor Network Using Cross Layer Design: A Design Review
Jan 2009
In the authors' paper, they consider the comparison performance of wireless sensor network to optimize the event detection and TDMA schemes using cross layer interaction. They consider the...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Erasure Insertion for Coded DUSTM-FHSS Systems Without a Priori Knowledge
Jan 2008
In this paper, the authors consider coded Frequency-Hopping Spread Spectrum (FHSS) systems with Differential Unitary Space-Time Modulation (DUSTM). They investigate the erasure insertion (EI)...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Demodulation and Performance Analysis of Differential Unitary Space-Time Modulation in Time-Varying Rician Channels
Jan 2008
Studies on differential unitary space-time modulation are mostly focused on Rayleigh fading channels. In this paper, the authors present new analytic results for the Maximum-Likelihood Demodulator...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Performance of Transmit Precoding in Time-Varying Point-to-Point and Multi-User MIMO Channels
Jan 2008
Transmit precoding strategies in Multiple-Input Multiple-Output (MIMO) systems provide a mechanism for increasing the performance of point-to-point links and enable spatial division multiple...
Provided by University of California
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White Papers
Transmission Range Optimization for FH-CDMA Networks in Time-Varying Channels
Jan 2008
Optimization of the transmission range for maximizing information efficiency is studied in this paper for mobile ad hoc networks with Frequency-Hopped (FH) CDMA and multiple antennas. Realistic...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
A Robust Coded MIMO FH-CDMA Transceiver for Mobile Ad Hoc Networks
Sep 2007
In this paper, the authors develop a coded MIMO FHCDMA transceiver that is robust to partial-band jamming and the near-far problem for ad hoc networks with high mobility. Spatial and frequency...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Evaluation of MIMO Techniques in FH-MA Ad Hoc Networks
Jan 2008
The authors consider an ad hoc network where Frequency Hopping (FH), convolutional coding and multiple antennas are employed in order to combat fading and Multiple Access (MA) interference. The...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
On the Performance of Concatenated Convolutional Code and Alamouti Space-Time Code With Noisy Channel Estimates and Finite-Depth Interleaving
Jan 2010
In this paper, performance of the Alamouti Space-Time Code (STC) and performance of the concatenation between the convolutional code and the Alamouti STC are derived. In order to describe...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Locality-Awareness in BitTorrent-Like P2P Applications
Sep 2008
This paper presents the measurement study of locality-aware P2P solutions over real-world Internet AS topology. By using the accesses of nodes of PlanetLab testbed, the authors create a detailed...
Provided by Vanderbilt University
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White Papers
Optimal Rate Allocation in Peer-to-Peer Streaming Over Wireless Networks
Mar 2011
Integrating Peer-to-Peer streaming with wireless networks is a promising technique which promotes ubiquitous multimedia services. Rate allocation within this context is essential to the overall...
Provided by Vanderbilt University
