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CNRS
(138 results)-
Whitepapers
Improving Clustering Techniques in Wireless Sensor Networks Using Thinning Process
December 6, 2010, 12:00am PST
The authors propose a rapid cluster formation algorithm using a thinning technique : rC-MHP(rapid Clustering inspired from Matern Hard-Core Process). In order to prove its performance, it is...
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Whitepapers
Highlighting the Effects of Joint MAC Layer Misbehavior and Virtual Link Attack in Wireless Ad Hoc Networks
April 1, 2008, 12:00am PDT
In wireless ad hoc networks, employing the IEEE 802.11 technology, access to the wireless medium is scheduled according to the CSMA/CA protocol. This protocol was designed with the assumption that...
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White Papers
Data Backup for Mobile Nodes : a Cooperative Middleware and Experimentation Platform
May 19, 2009, 12:00am PDT
Finding the right abstractions to design middleware for the provision of dependable distributed applications on mobile devices is still a big challenge. New technical and scientific challenges...
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White Papers
A Secure Asynchronous FPGA Architecture, Experimental Results and Some Debug Feedback
March 8, 2011, 12:00am PST
This paper presents an asynchronous FPGA architecture for implementing cryptographic algorithms secured against physical cryptanalysis. The authors discuss the suitability of asynchronous...
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White Papers
Clusters, Graphs, and Networks for Analysing Internet-Web Supported Communication Within Virtual Community
July 10, 2007, 12:00am PDT
The proposal is to use clusters, graphs and networks as models in order to analyse the Web structure. Clusters, graphs and networks provide knowledge representation and organization. Clusters were...
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White Papers
Achievable Outage Rates With Improved Decoding of Bicm Multiband OFDMA Under Channel Estimation Errors
August 10, 2007, 12:00am PDT
The authors consider the decoding of Bit Interleaved Coded Modulation (BICM) applied to multiband OFDM for practical scenarios where only a noisy (possibly very bad) estimate of the channel is...
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White Papers
Automated Security Proofs With Sequences of Games
January 1, 2011, 12:00am PST
This paper presents the first automatic technique for proving not only protocols but also primitives in the exact security computational model. Automatic proofs of cryptographic protocols were up...
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White Papers
Research Report : Collaborative Peer 2 Peer Edition: Avoiding Conflicts Is Better Than Solving Conflicts
January 4, 2010, 12:00am PST
Collaborative edition is achieved by distinct sites that work independently on (a copy of) a shared document. Conflicts may arise during this process and must be solved by the collaborative...
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White Papers
Toward a Gigabit Wireless Communications System
August 1, 2009, 12:00am PDT
This paper presented the design and the implementation of a 60 GHz communication system for WPAN applications in point-to-point or point-to-multipoint configurations. The proposed system provides...
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White Papers
Market Efficiency, Anticipation And The Formation Of Bubbles-crashes
June 9, 2011, 12:00am PDT
A dynamical model is introduced for the formation of bullish or bearish trends driving an asset price in a given market. Initially, each agent decides to buy or sell according to its personal...
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Whitepapers
A Multi-Level Hierarchical Game-Theoretical Approach for Cognitive Networks
September 14, 2010, 12:00am PDT
Over the past decade, more and more research works have been devoted to study decentralized or distributed wireless networks. There are many relevant concepts such as cognitive radio, unlicensed...
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Whitepapers
Joint Power Control-Allocation for Green Cognitive Wireless Networks Using Mean Field Theory
September 14, 2010, 12:00am PDT
The purpose of this paper is to show how key concepts from control theory, game theory, and mean field theory can be exploited to design joint control-allocation policies in cognitive wireless...
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Whitepapers
An Efficient Hierarchical Dual Cache System for NAND Flash Memories
September 11, 2012, 12:00am PDT
NAND flash memories are the most important storage media in mobile computing and tend to be less confined to this area. Nevertheless, it is not mature enough to allow a widespread use. This is due...
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Whitepapers
Mapping SPARQL Query to Temporal Logic Query Based on N?SMV Model Checker to Query Semantic Graphs
September 11, 2012, 12:00am PDT
The RDF (W3C standard for meta-modeling) language is the most frequently used to represent the semantic graphs. This conversion aims checking the semantic graphs that have numerous errors of...
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Whitepapers
Computer-Assisted Machine-to-Human Protocols for Authentication of a RAM-Based Embedded System
May 21, 2012, 12:00am PDT
Mobile readers used for optical identification of manufactured products can be tampered in different ways: with hardware Trojan or by powering up with fake configuration data. How a human verifier...
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Whitepapers
System-Level Methods to Prevent Reverse-Engineering, Cloning, and Trojan Insertion
August 9, 2012, 12:00am PDT
The Reverse-Engineering (RE) is a real threat on high-value electronic circuits. Many unitary solutions have been proposed to make RE difficult. Most of them are low-level, and thus costly to...
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Whitepapers
Improving Accuracy in Available Bandwidth Estimation for IEEE 802.11-Based Ad Hoc Networks
November 26, 2008, 12:00am PST
In this paper, the authors propose a method to enhance accuracy of the available bandwidth estimation in IEEE 802.11-based ad hoc networks. This method combines medium state monitoring,...
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Whitepapers
Cluster-Tree Based Energy Efficient Protocol for Wireless Sensor Networks
January 21, 2010, 12:00am PST
Wireless sensor networks are conceived to monitor a certain application or physical phenomena and are supposed to function for several years without any human intervention for maintenance. Thus,...
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Whitepapers
Probe and Pray: Using UPnP for Home Network Measurements
December 28, 2011, 12:00am PST
Network measurement practitioners increasingly focus their interest on understanding and debugging home networks. The Universal Plug and Play (UPnP) technology holds promise as a highly efficient...
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Whitepapers
Energy-Efficient Data Collection in WSN: A Sink-Oriented Dynamic Backbone
May 24, 2012, 12:00am PDT
In wireless sensor networks, energy efficiency is generally achieved by turning off some capabilities from a subset of deployed sensors. The set of active nodes must therefore meet the application...
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Whitepapers
Non-Parametric Multiple-Antenna Blind Spectrum Sensing by Predicted Eigenvalue Threshold
May 24, 2012, 12:00am PDT
In this paper, the authors consider the problem of sensing a primary user in a cognitive radio network by employing multiple antennas at the secondary user. Among the many spectrum sensing...
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Whitepapers
On the Optimal Scheduling in Pull-Based Real-Time P2P Streaming Systems: Layered and Non-Layered Streaming
May 24, 2012, 12:00am PDT
During the last decade, the authors witnessed a rapid growth in deployment of pull-based P2P streaming applications. In these applications, each node selects some other nodes as its neighbors and...
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Whitepapers
Smooth Delivery of Layered Video Stream in P2P Networks
May 24, 2012, 12:00am PDT
Layered streaming in Peer-To-Peer (P2P) networks has drawn great interests since not only it can accommodate a large number of users but also it handles heterogeneities of peers. However, there's...
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Whitepapers
IPv6 Routing and Auto-configuration in Extended LANs
May 24, 2012, 12:00am PDT
The authors consider extended LANs composed of two different parts: a static one with hosts and routers, and a dynamic one with mobile hosts. They propose a scheme for interconnecting the two...
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Whitepapers
Digital Block Design of MIMO Hardware Simulator for LTE Applications
May 24, 2012, 12:00am PDT
This paper presents new frequency domain and time domain architectures for the digital block of a hardware simulator of MIMO propagation channels, with 3GPP TR 36.803 channel models test, for LTE...
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Whitepapers
Frequency Allocation in a SDMA Satellite Communication System With Beam Moving
May 24, 2012, 12:00am PDT
Spatial Division Multiple Access (SDMA) is a principle of radio resource sharing that separates communication channels in space. It relies on adaptive and dynamic beamforming technology and...
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Whitepapers
A Joint Decode-and-Forward Strategy for Physical Network Coding Based on Factor Graphs
December 20, 2011, 12:00am PST
The authors consider physical network coding on a two-way relay channel. Two source nodes send their packets simultaneously over time-varying MIMO channels to a relay node. Assuming that the relay...
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Whitepapers
Robustness of a Time Reversal System: From Ultra-Wide to Narrow Bandwidths
May 24, 2012, 12:00am PDT
The robustness of the Time Reversal (TR) scheme in a non stationary channel environment has been previously studied for Ultra-Wide Band (UWB) channels. However, its robustness with different...
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Whitepapers
Throughput Analysis of Hybrid Single-Packet and Multiple-Packet Truncated Type-II HARQ Strategies With Unreliable Feedback Channel
March 12, 2012, 12:00am PDT
In this paper, the authors investigate different HARQ strategies with unreliable feedback channel. In classical approaches, retransmitted packets are different versions of the same user data. In...
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Whitepapers
Binary Diversity for Non-Binary LDPC Codes Over the Rayleigh Channel
March 12, 2012, 12:00am PDT
In this paper, the authors analyze the performance of several bit-interleaving strategies applied to Non-Binary Low-Density Parity-Check (LDPC) codes over the Rayleigh fading channel. The...
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Whitepapers
Cooperation Enforcement for Packet Forwarding Optimization in Multi-Hop Ad-Hoc Networks
March 12, 2012, 12:00am PDT
Ad-hoc networks are independent of any infrastructure. The nodes are autonomous and make their own decisions. They also have limited energy resources. Thus, a node tends to behave selfishly when...
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Whitepapers
TC-IROCX: Network Coding With Topology Control and Interference Awareness
March 12, 2012, 12:00am PDT
Network coding is a recent technique that has many advantages such as reducing the bandwidth consumption and increasing the throughput. IROCX is a routing algorithm that applies network coding...
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Whitepapers
Analysis of Sum-Weight-Like Algorithms for Averaging in Wireless Sensor Networks
September 1, 2012, 12:00am PDT
Distributed estimation of the average value over a Wireless Sensor Network has recently received a lot of attention. Most papers consider single variable sensors and communications with feedback...
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Whitepapers
Fluctuations of Spiked Random Matrix Models and Failure Diagnosis in Sensor Networks
May 11, 2012, 12:00am PDT
In this paper, the joint fluctuations of the extreme eigen-values and eigenvectors of a large dimensional sample covariance matrix are analyzed when the associated population covariance matrix is...
Provided by CNRS
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Whitepapers
Resource Allocation for Downlink Cellular OFDMA Systems: Part II - Practical Algorithms and Optimal Reuse Factor
May 19, 2009, 12:00am PDT
In this paper, the authors propose a distributed practical resource allocation algorithm with low complexity. They study the asymptotic behavior of both this simplified resource allocation...
Provided by CNRS
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Whitepapers
Performance of Asynchronous Two-Relay Two-Hop Wireless Cooperative Networks
July 27, 2009, 12:00am PDT
In wireless cooperative networks, the asynchronism between the relays can be a source of diversity which is similar in its essence to the multipath diversity of frequency selective channels. In...
Provided by CNRS
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Whitepapers
BER and Outage Probability Approximations for LMMSE Detectors on Correlated MIMO Channels
April 30, 2009, 12:00am PDT
This paper is devoted to the study of the performance of the Linear Minimum Mean-Square Error receiver for (receive) correlated Multiple-Input Multiple-Output systems. However, this approximation...
Provided by CNRS
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Whitepapers
A Central Limit Theorem for the SINR at the LMMSE Estimator Output for Large Dimensional Signals
July 6, 2009, 12:00am PDT
This paper is devoted to the performance study of the Linear Minimum Mean Squared Error estimator for multidimensional signals in the large dimension regime. Such an estimator is frequently...
Provided by CNRS
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Whitepapers
On the Capacity Achieving Covariance Matrix for Rician MIMO Channels : An Asymptotic Approach
October 23, 2008, 12:00am PDT
In this contribution, the capacity-achieving input covariance matrices for coherent block-fading correlated MIMO Rician channels are determined. In contrast with the Rayleigh and uncorrelated...
Provided by CNRS
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Whitepapers
Outage Probability Based Power and Time Optimization for Relay Networks
September 25, 2008, 12:00am PDT
In the context of cooperative wireless networks that convey data on slow fading channels, outage probability Po is the relevant performance index from the point of view of information theory....
Provided by CNRS
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Whitepapers
A Packing Model to Estimate VANET Capacity
September 13, 2012, 12:00am PDT
In IEEE 802.11p VANET networks the transmission scheduling is distributed and asynchronous. The number of simultaneous transmitters is thus closely related to the CSMA/CA mechanism which limits...
Provided by CNRS
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Whitepapers
Node Coloring and Color Conflict Detection in Wireless Sensor Networks
October 8, 2010, 12:00am PDT
In wireless sensor networks, energy efficiency is mainly achieved by making nodes sleep. In this paper, the authors present the combination of SERENA, a new node activity scheduling algorithm...
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Whitepapers
Efficient Compilation of .NET Programs for Embedded Systems
October 2, 2012, 12:00am PDT
Compiling under the Closed-World Assumption (CWA) has been shown to be an appropriate way for implementing object-oriented languages such as Java on low-end embedded systems. In this paper, the...
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Whitepapers
A New Class of Hash-Chain Based Key Pre-Distribution Schemes for WSN
January 15, 2013, 12:00am PST
In the last decade, the authors witness a proliferation of potential application domains of Wireless Sensor Networks (WSN). Therefore, a host of research works have been conducted by both academic...
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Whitepapers
Optimizing QoS InWireless Sensors Networks Using a Caching Platform
March 4, 2013, 12:00am PST
This paper addresses monitoring and surveillance applications using Wireless Sensors Networks (WSNs). In this context, several remote clients are interested in receiving the information collected...
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Whitepapers
The Strength of Vicinity Annexation in Opportunistic Networking
February 19, 2013, 12:00am PST
Most disruption-tolerant networking protocols available have focused on mere contact and inter-contact characteristics to make forwarding decisions. The authors propose to relax such a simplistic...
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Whitepapers
Optimal Design of Virtual Links in AFDX Networks
January 14, 2013, 12:00am PST
The Avionics Full Duplex Switched Ethernet (AFDX) backbone constitutes one of the major technological breakthroughs in modern avionic architectures. This network is based on routing Ethernet...
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Whitepapers
Enabling Sleep Mode in Backbone IP-Networks: A Criticality-Driven Tradeoff
February 20, 2012, 12:00am PST
The energy consumption of network devices, and, as a consequence, of communication networks, is generally independent from their level of utilization, which results in a waste of energy when the...
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Whitepapers
Wyner-Ziv Lattice Coding for Two-Way Relay Channel
August 6, 2012, 12:00am PDT
A Two-Way Relay Channel (TWRC) in which duplex transmission between two users via a relay station is considered. A physical layer network coding strategy based on compress-and-forward relaying...
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Whitepapers
Lattice-Based Wyner-Ziv Coding for Parallel Gaussian Two-Way Relay Channels
October 17, 2012, 12:00am PDT
Parallel two-way relay channel models a cooperative communication scenario where a relay helps two terminals to exchange their messages over independent Gaussian channels. For the single channel...
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Whitepapers
Finite Dimensional Nested Lattices Based Wyner-Ziv Coding for Two-Way Relay Channel
September 30, 2012, 12:00am PDT
Two-Way Relay Channel (TWRC) models a cooperative communication situation performing duplex transmission via a relay station. For this channel, the authors have shown previously that a...
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Whitepapers
Joint Decoding of Multiple-Description Network-Coded Data
May 20, 2011, 12:00am PDT
This paper considers a transmission scheme combining Multiple Description Coding (MDC) and Network Coding (NC). The authors' aim is to benefit from the property of MDC to provide progressive...
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Whitepapers
Characterizing End-Host Application Performance Across Multiple Networking Environments
January 11, 2012, 12:00am PST
Users today connect to the Internet everywhere - from home, work, airports, friend's homes, and more. This paper characterizes how the performance of networked applications varies across...
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Whitepapers
Predicting User Dissatisfaction With Internet Application Performance at End-Hosts
January 15, 2013, 12:00am PST
The authors design predictors of user dissatisfaction with the performance of applications that use networking. Their approach combines user-level feedback with low level machine and networking...
Provided by CNRS
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Whitepapers
A Study of Microbial Flora and MRSA Harboured by Mobile Phones of Health Care Personnel
July 31, 2012, 12:00am PDT
Mobile phones are increasingly being used by health care workers in day today life. They come in contact with various surfaces while carrying out health care activities and are thus likely to get...
Provided by CNRS
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Whitepapers
GIS Based Service Oriented Architecture Approach for Electric Distribution
December 1, 2012, 12:00am PST
In this age of technological advancements, the electricity distribution operators continuously seek new and innovative ways to create differentiation and increase profits. The customers do not...
Provided by CNRS
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Whitepapers
Implicit Tensor-Mass Solver on the GPU
June 27, 2012, 12:00am PDT
The realist and interactive simulation of deformable objects has become a challenge in computer graphics. For this, the tensor-mass model enables local solving of mechanical equations, making it...
Provided by CNRS
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Whitepapers
A Decentralized Privacy Preserving Reputation Protocol for the Malicious Adversarial Model
June 1, 2012, 12:00am PDT
Users hesitate to submit negative feedback in reputation systems due to the fear of retaliation from the recipient user. A privacy preserving reputation protocol protects users by hiding their...
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Whitepapers
A Privacy Preserving Prediction-Based Routing Protocol for Mobile Delay Tolerant Networks
April 1, 2012, 12:00am PDT
A prediction-based routing protocol for mobile delay tolerant networks works by forwarding a message from one intermediate node to another if the latter has higher probability of encountering the...
Provided by CNRS
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Whitepapers
A Self-Regulating Protocol for Efficient Routing in Mobile Delay Tolerant Networks
May 20, 2012, 12:00am PDT
In this paper, the authors present a novel routing protocol for mobile delay tolerant networks, called Community-based Adaptive Spray (CAS). How to maximize routing performance (delivery ratio)...
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Whitepapers
An Analysis of Strategies for Preventing Selfish Behavior in Mobile Delay Tolerant Networks
March 23, 2012, 12:00am PDT
In mobile Delay Tolerant Networks (DTNs), messages are routed in a mobility-assisted manner. Therefore, the willingness of nodes to relay messages for other nodes plays a significant role in the...
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Whitepapers
A Hybrid Cross Entropy Algorithm for Solving Dynamic Transit Network Design Problem
November 22, 2012, 12:00am PST
This paper proposes a hybrid multiagent learning algorithm for solving the dynamic simulation-based bi-level network design problem. The objective is to determine the optimal frequency of a...
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Whitepapers
Streaming Multimedia Over WMSNs: An Online Multipath Routing Protocol
May 10, 2012, 12:00am PDT
Routing has become an important challenge to Wireless Multimedia Sensor Networks (WMSNs) from the standpoint of supporting multimedia applications due to the constraints on energy and...
Provided by CNRS
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Whitepapers
Security Policy Enforcement Through Refinement Process
April 9, 2010, 12:00am PDT
In the area of networks, a common method to enforce a security policy expressed in a high-level language is based on an ad-hoc and manual rewriting process. The authors argue that it is possible...
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Whitepapers
GeneSyst: a Tool to Reason about Behavioral Aspects of B Event Specifications. Application to Security Properties
April 9, 2010, 12:00am PDT
In this paper, the authors present a method and a tool to build symbolic labelled transition systems from B specifications. The tool, called GeneSyst, can take into account refinement levels and...
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Whitepapers
Closed - Form Error Probability of Network - Coded Cooperative Wireless Networks With Channel - Aware Detectors
January 19, 2012, 12:00am PST
In this paper, the authors propose a simple analytical methodology to study the performance of multi-source multi-relay cooperative wireless networks with network coding at the relay nodes and...
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Whitepapers
On the Asymptotic Analysis of Mutual Information of MIMO Rician Correlated Channels
January 1, 2012, 12:00am PST
The analysis of mutual information and capacity of block fading MIMO static channels has generated considerable interest since the seminal work of Telatar in 1995. The vast majority of these works...
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Whitepapers
Optimal Reuse Factor and Resource Allocation for Downlink OFDMA with Multicell Interference
May 15, 2008, 12:00am PDT
Resource allocation in the downlink of OFDMA systems has been studied in a number of works. In, it was proven that the optimal resource allocation that maximizes the sum capacity of the users in...
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Whitepapers
Outage Probability Approximation for the Wiener Filter SINR in MIMO Systems
April 22, 2008, 12:00am PDT
This paper studies the fluctuations of the post-processing SNR at the output of the linear MMSE receiver in (receive) correlated Multiple Input Multiple Output (MIMO) systems. Although it is known...
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Whitepapers
Fluctuations of the SNR at the Wiener Filter Output for Large Dimensional Signals
April 17, 2008, 12:00am PDT
Consider the linear Wiener receiver for multidimensional signals. Such a receiver is frequently encountered in wireless communications and in array processing, and the Signal to Noise Ratio (SNR)...
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Whitepapers
On the Error Exponents for Detecting Randomly Sampled Noisy Diffusion Processes
September 25, 2008, 12:00am PDT
This paper deals with the detection of a continuous random process described by an Ornstein-Uhlenbeck (O-U) stochastic differential equation. Randomly spaced sensors or equivalently a random time...
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Whitepapers
Distributed Estimation of the Maximum Value Over a Wireless Sensor Network
November 2, 2011, 12:00am PDT
This paper focuses on estimating the maximum of the initial measures in a Wireless Sensor Network. Two different algorithms are studied : the random gossip, relying on pair-wise exchanges between...
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Whitepapers
Local Failure Localization in Large Sensor Networks
August 25, 2011, 12:00am PDT
The joint fluctuations of the extreme eigen-values and eigenvectors of large sample covariance matrices of the spiked-model type are analyzed. This result is used to develop an original framework...
Provided by CNRS
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Whitepapers
Outage Probability Based Power and Time Optimization for Relay Networks
September 25, 2008, 12:00am PDT
In the context of cooperative wireless networks that convey data on slow fading channels, outage probability Po is the relevant performance index from the point of view of information theory....
Provided by CNRS
-
Whitepapers
On the Capacity Achieving Covariance Matrix for Rician MIMO Channels : An Asymptotic Approach
October 23, 2008, 12:00am PDT
In this contribution, the capacity-achieving input covariance matrices for coherent block-fading correlated MIMO Rician channels are determined. In contrast with the Rayleigh and uncorrelated...
Provided by CNRS
-
Whitepapers
A Central Limit Theorem for the SINR at the LMMSE Estimator Output for Large Dimensional Signals
July 6, 2009, 12:00am PDT
This paper is devoted to the performance study of the Linear Minimum Mean Squared Error estimator for multidimensional signals in the large dimension regime. Such an estimator is frequently...
Provided by CNRS
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Whitepapers
BER and Outage Probability Approximations for LMMSE Detectors on Correlated MIMO Channels
April 30, 2009, 12:00am PDT
This paper is devoted to the study of the performance of the Linear Minimum Mean-Square Error receiver for (receive) correlated Multiple-Input Multiple-Output systems. However, this approximation...
Provided by CNRS
-
Whitepapers
Performance of Asynchronous Two-Relay Two-Hop Wireless Cooperative Networks
July 27, 2009, 12:00am PDT
In wireless cooperative networks, the asynchronism between the relays can be a source of diversity which is similar in its essence to the multipath diversity of frequency selective channels. In...
Provided by CNRS
-
Whitepapers
Resource Allocation for Downlink Cellular OFDMA Systems: Part II - Practical Algorithms and Optimal Reuse Factor
May 19, 2009, 12:00am PDT
In this paper, the authors propose a distributed practical resource allocation algorithm with low complexity. They study the asymptotic behavior of both this simplified resource allocation...
Provided by CNRS
-
Whitepapers
Fluctuations of Spiked Random Matrix Models and Failure Diagnosis in Sensor Networks
May 11, 2012, 12:00am PDT
In this paper, the joint fluctuations of the extreme eigen-values and eigenvectors of a large dimensional sample covariance matrix are analyzed when the associated population covariance matrix is...
Provided by CNRS
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