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Hindawi Publishing
(1834 results)-
Whitepapers
DI-GEP: A New Lifetime Extending Algorithm for Target Tracking in Wireless Sensor Networks
January 4, 2012, 12:00am PST
Wireless Sensor Networks (WSNs) are widely used in detecting, locating, and tracking moving objects. The cheap, low-powered, and energy-limited sensors that are set up in large areas may consume...
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Whitepapers
One-Time Broadcast Encryption Schemes in Distributed Sensor Networks
December 10, 2011, 12:00am PST
Broadcasting is a message-transferring method characteristic for majority of sensor networks. Broadcast Encryption (BE) is broadcasting encrypted messages in such a way that only legitimate nodes...
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Whitepapers
An Unbound Network Coding for Extended IEEE 802.16j Multihop Relay Network
November 21, 2011, 12:00am PST
In this paper, the authors propose a network coding-based relay scheme for multi-hop relay networks, called NC-BR. It allows RSs to combine two wireless backhaul transmissions into one using the...
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Whitepapers
A Novel Centroid Localization for Wireless Sensor Networks
November 23, 2011, 12:00am PST
Self-localization of sensor nodes is one of the key issues in wireless sensor networks. Based on the analysis of traditional range-free algorithms such as centroid and APIT (Approximate Perfect...
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Whitepapers
Grid-Based Predictive Geographical Routing for Inter-Vehicle Communication in Urban Areas
January 2, 2012, 12:00am PST
Vehicular Ad-hoc NETworks (VANETs) are highly mobile wireless ad hoc networks for vehicular safety and other commercial applications, whereby vehicles move non-randomly along roads while...
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Whitepapers
Reliable Latency-Aware Routing for Clustered WSNs
January 2, 2012, 12:00am PST
Wireless Sensor Networks (WSNs) are persistently evolving from merely a notion of microelectronics to a new realm of practical applications. Certain critical applications like disaster management,...
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Whitepapers
The Effects of Motion on Distributed Detection in Mobile Ad Hoc Sensor Networks
November 4, 2011, 12:00am PDT
In this paper, the authors consider a set of mobile wireless sensors that collect observations about a brief, localized event. As they continue to move about, one of them processes its...
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Whitepapers
A Lightweight Lap Time Measurement System for Alpine Ski Sport Using a TDMA-Based Linear Wireless Sensor Network
November 9, 2011, 12:00am PST
In this paper, the authors proposed a practical TDMA-based WSN protocol named LSNP that is dedicated to a class of sensor network application fields where nodes are placed in a linear fashion in a...
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Whitepapers
Wireless Link-Quality Estimation in Smart Grid Environments
December 22, 2011, 12:00am PST
In this paper, the performance of the state-of-the-art link-quality estimation methods is investigated for different smart power grid environments, such as outdoor substation, underground network...
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Whitepapers
A Dynamic Traffic-Aware Duty Cycle Adjustment MAC Protocol for Energy Conserving in Wireless Sensor Networks
November 9, 2011, 12:00am PST
Wireless sensors are battery-limited sensing and computing devices. In this paper, a dynamic traffic-aware MAC protocol for energy conserving in wireless sensor networks is proposed. The proposed...
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Whitepapers
Error-Tolerant and Energy-Efficient Coverage Control Based on Biological Attractor Selection Model in Wireless Sensor Networks
November 10, 2011, 12:00am PST
A coverage problem is one of the important issues to prolong the lifetime of a wireless sensor network while guaranteeing that the target region is monitored by a sufficient number of active...
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Whitepapers
A Distributed Algorithm for Virtual Backbone Construction with Cellular Structure in WSNs
November 24, 2011, 12:00am PST
The normal node in Wireless Sensor Networks (WSNs) often has no constant energy supply. To make efficient use of limited energy resources significant, a major way to save limited energy resources...
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Whitepapers
An Experimental Study of WSN Power Efficiency: MICAz Networks with XMesh
October 20, 2011, 12:00am PDT
This is an investigation of Wireless Sensor Networks (WSNs) using Memsic's XMesh routing protocol on MICAz wireless motes. It focuses on the study of the practical aspects of WSNs' power...
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Whitepapers
A Mutual Algorithm for Optimizing Distributed Source Coding in Wireless Sensor Networks
November 16, 2011, 12:00am PST
Wireless Sensor Networks (WSNs) are composed of small wireless nodes equipped with sensors, a processor, and a radio communication unit, all normally powered by batteries. In this paper, the...
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Whitepapers
Performance Evaluation of Indices-Based Query Optimization from Flash-Based Data Centric Sensor Devices in Wireless Sensor Networks
October 16, 2011, 12:00am PDT
Flash memory has become a more widespread storage medium for modern wireless devices because of its effective characteristics like non-volatility, small size, light weight, fast access speed,...
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Whitepapers
The Search Benefits of Autonomous Mobility in Distributed Sensor Networks
November 5, 2011, 12:00am PDT
In this paper, the authors consider a problem of finding the effectiveness of applying varying amounts of motion in fields of autonomous unmanned vehicles performing group search operations. These...
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Whitepapers
Statistically Bounding Detection Latency in Low-Duty-Cycled Sensor Networks
October 11, 2011, 12:00am PDT
In this paper, the authors study the fundamental problem of bounding detection delays when the sensor network is low duty cycled. They propose a novel approach for statistically bounding detection...
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Whitepapers
Tree-Based Neighbor Discovery in Urban Vehicular Sensor Networks
October 24, 2011, 12:00am PDT
In urban vehicular sensor networks, vehicles equipped with onboard sensors monitor some area, and the result can be shared to neighbor vehicles to correct their own sensing data. In this paper,...
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Whitepapers
Design of an Effective WSN-Based Interactive U-Learning Model
October 17, 2011, 12:00am PDT
In this paper, the authors present a model of an effective and interactive ubiquitous learning environment system based on the concepts of ubiquitous computing technology that enables learning to...
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Whitepapers
Novel Energy-Efficient Miner Monitoring System with Duty-Cycled Wireless Sensor Networks
October 13, 2011, 12:00am PDT
Target monitoring is an important application of wireless sensor networks. In this paper, the authors develop an energy-efficient miner monitoring system with sensor nodes. To keep monitoring...
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Whitepapers
Survey: Discovery in Wireless Sensor Networks
October 13, 2011, 12:00am PDT
Neighbor discovery is a component of communication and access protocols for ad hoc networks. Wireless sensor networks often must operate under a more severe low-power regimen than do traditional...
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Whitepapers
A Fast and Reliable Hybrid Data Delivery Protocol for Large-Scale Heterogeneous Sensor Networks
October 16, 2011, 12:00am PDT
The authors propose a hybrid data delivery method for the large-scale heterogeneous sensor networks, which is a fast and reliable delivery protocol for the aggregated data from the sinks to the...
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Whitepapers
An Efficient Key Management Scheme for Wireless Sensor Networks
September 19, 2011, 12:00am PDT
In this paper, the authors propose a novel key management scheme called MAKM (Modular Arithmetic-based Key Management). The proposed MAKM scheme is based on the congruence property of modular...
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Whitepapers
Subjective Logic-Based Anomaly Detection Framework in Wireless Sensor Networks
September 28, 2011, 12:00am PDT
In existing anomaly detection approaches, sensor node often turns to neighbors to further determine whether the data is normal while the node itself cannot decide. However, previous works consider...
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Whitepapers
Energy-Balanced Density Control to Avoid Energy Hole for Wireless Sensor Networks
October 2, 2011, 12:00am PDT
In this paper, the theoretical aspects of the network load and the node density are investigated systematically. And then, the accessibility condition to satisfy that all the working sensors...
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Whitepapers
A Self-Organized and Smart-Adaptive Clustering and Routing Approach for Wireless Sensor Networks
October 6, 2011, 12:00am PDT
In this paper, the authors propose a Self-Organized and Smart-Adaptive Clustering (SOSAC) and routing method, which performs clustering in WSNs, operates the formed clusters in a smart-adaptive...
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Whitepapers
Adaptive Source Location Estimation Based on Compressed Sensing in Wireless Sensor Networks
September 14, 2011, 12:00am PDT
In this paper, the authors propose an effective source localization algorithm based on CS, which is used on sparsely distributed RSS-WSNs. Extensive simulations show that the proposed algorithm...
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Whitepapers
Distributed Algorithm for Real-Time Energy Optimal Routing Based on Dual Decomposition of Linear Programming
September 16, 2011, 12:00am PDT
In this paper, the authors propose a novel in-network distributed algorithm for real-time energy optimal routing in ad hoc and sensor networks for systems with linear cost functions and constant...
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Whitepapers
MAC Protocols Used by Wireless Sensor Networks and a General Method of Performance Evaluation
September 16, 2011, 12:00am PDT
Many researchers employ IEEE802.15.4 as communication technology for Wireless Sensor Networks (WSNs). However, Medium Access Control (MAC) layer requirements for communications in Wireless Sensor...
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Whitepapers
Linear Decision Fusion Under the Control of Constrained PSO for WSNs
September 26, 2011, 12:00am PDT
A major application of a distributed WSN (Wireless Sensor Network) is to monitor a specific area for detecting some events such as disasters and enemies. In order to achieve this objective, each...
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Whitepapers
Information Fusion-Based Storage and Retrieve Algorithms for WSNs in Disaster Scenarios
September 19, 2011, 12:00am PDT
Sensor networks are especially useful in catastrophic or disaster scenarios such as abysmal sea, floods, fires, or earthquakes where human participation may be too dangerous. This paper focuses on...
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Whitepapers
A Mobile Computing Framework for Pervasive Adaptive Platforms
September 16, 2011, 12:00am PDT
Ubiquitous computing is now the new computing trend; such systems that interact with their environment require self-adaptability. Bioinspiration is a natural candidate to provide the capability to...
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Whitepapers
Analysis of Mobility and Sharing of WSNs by IP Applications
October 13, 2011, 12:00am PDT
Movement of wireless sensor and actuator networks and of nodes between WSANs is becoming more commonplace. However, enabling remote usage of sensory data in multiple applications, remote...
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Whitepapers
Localization Algorithm Based on Maximum a Posteriori in Wireless Sensor Networks
September 19, 2011, 12:00am PDT
Many applications and protocols in wireless sensor networks need to know the locations of sensor nodes. A low-cost method to localize sensor nodes is to use Received Signal Strength Indication...
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Whitepapers
Adaptive WSN Scheduling for Lifetime Extension in Environmental Monitoring Applications
August 27, 2011, 12:00am PDT
In this paper, a novel algorithm for determining efficient sampling schedules for data gathering WSNs is proposed. The algorithm differs from previous work in that it dynamically adapts the...
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Whitepapers
An Efficient Data-Gathering Scheme for Heterogeneous Sensor Networks via Mobile Sinks
August 27, 2011, 12:00am PDT
Typical Wireless Sensor Networks (WSNs) use static sinks to collect data from all sensor nodes via multihop forwarding. In this paper, the authors propose an approach in which the mobile sink...
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Whitepapers
Robust Interval-Based Localization Algorithms for Mobile Sensor Networks
August 27, 2011, 12:00am PDT
In this paper, the authors consider the localization problem in mobile sensor networks. Such a problem is a challenging task, especially when measurements exchanged between sensors may contain...
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Whitepapers
Routing-Aware Clustering Algorithms for Two-Tiered Sensor Networks
August 24, 2011, 12:00am PDT
In this paper, the authors have proposed two routing-aware, distributed algorithms for assigning sensor nodes to clusters in two-tiered networks. The first heuristic assumes that all relay nodes,...
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Whitepapers
A Survey of Adaptive and Real-Time Protocols Based on IEEE 802.15.4
September 4, 2011, 12:00am PDT
The IEEE 802.15.4 standard is a protocol that has been widely used in many applications exploiting Wireless Sensor Networks (WSNs). In this paper, the authors first discuss the negative aspects of...
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Whitepapers
A Truthful Bilateral Multiunit Auction for Heterogeneous Cognitive Radio Networks
August 7, 2011, 12:00am PDT
Dynamic spectrum access technology has attracted much attention for its capability of improving spectrum efficiency. For attracting primary users to participate in secondary spectrum market, an...
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Whitepapers
CP-Based SBHT-RLS Algorithms for Tracking Channel Estimates in Multicarrier Modulation Systems
October 3, 2011, 12:00am PDT
Cyclic Prefix (CP) in multicarrier modulation systems has been considered as an alternative to the training sequences to track channel estimates. In this paper, two new algorithms are developed...
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Whitepapers
Multicriteria Reconfiguration of Distribution Network with Distributed Generation
November 7, 2011, 12:00am PST
The paper addresses the problem of multi-criteria reconfiguration of distribution network with distributed generation according to the criterion of minimum power loss under normal conditions and...
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Whitepapers
Status Data and Communication Aspects in Dynamically Clustered Network-on-Chip Monitoring
November 1, 2011, 12:00am PDT
Monitoring and diagnostic systems are required in modern Network-on-Chip implementations to assure high performance and reliability. A dynamically clustered NoC monitoring structure for traffic...
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Whitepapers
A Buffer-Sizing Algorithm for Network-on-Chips with Multiple Voltage-Frequency Islands
November 1, 2011, 12:00am PDT
Buffers in on-chip networks constitute a significant proportion of the power consumption and area of the interconnection, and hence reducing them is an important problem. Application-specific...
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Whitepapers
Intelligent On/Off Dynamic Link Management for On-Chip Networks
December 3, 2011, 12:00am PST
Networks-on-Chips (NoCs) provide scalable on-chip communication and are expected to be the dominant interconnection architectures in multi-core and many-core systems. Power consumption, however,...
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Whitepapers
A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications
November 17, 2011, 12:00am PST
Multiple-Input Multiple-Output (MIMO) techniques in combination with high constellation orders have been identified as a promising approach to high spectral efficiency systems. Prominent detection...
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Whitepapers
An Enhanced Genetic Algorithm to Solve the Static and Multistage Transmission Network Expansion Planning
November 18, 2011, 12:00am PST
An Enhanced Genetic Algorithm (EGA) is applied to solve the Long-Term Transmission Expansion Planning (LTTEP) problem. The following characteristics of the proposed EGA to solve the static and...
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Whitepapers
On Particle Swarm Optimization for MIMO Channel Estimation
December 14, 2011, 12:00am PST
Multiple-Input Multiple-Output (MIMO) transmission is considered as a key technology to reach the challenging goals of upcoming wireless standards, such as Long-Term Evolution Advanced (LTE-A). A...
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Whitepapers
Analysis and Mitigation of the Narrowband Interference Impact on IR-UWB Communication Systems
December 13, 2011, 12:00am PST
The impact of narrowband interference signals on impulse radio Ultra-WideBand (UWB) communication system has been investigated. A closed form expression for the bit error rate performance of UWB...
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Whitepapers
Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers
October 31, 2011, 12:00am PDT
In modern wideband communication receivers, the large input-signal dynamics is a fundamental problem. Unintentional signal clipping occurs, if the receiver front-end with the analog-to-digital...
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Whitepapers
Transmission Network Expansion Planning Considering Phase-Shifter Transformers
January 16, 2012, 12:00am PST
This paper presents a novel mathematical model for the transmission network expansion planning problem. Main idea is to consider Phase-Shifter (PS) transformers as a new element of the...
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Whitepapers
Efficient Dual Domain Decoding of Linear Block Codes Using Genetic Algorithms
January 12, 2012, 12:00am PST
A computationally efficient algorithm for decoding block codes is developed using a Genetic Algorithm (GA). The proposed algorithm uses the dual code in contrast to the existing genetic decoders...
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Whitepapers
Ranging Performance of the IEEE 802.15.4a UWB Standard Under FCC/CEPT Regulations
January 29, 2012, 12:00am PST
The IEEE 802.15.4a standard for wireless sensor networks is designed for high-accuracy ranging using Ultra-WideBand (UWB) signals. It supports coherent and non-coherent (energy detector)...
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Whitepapers
A State-Based Modeling Approach for Efficient Performance Evaluation of Embedded System Architectures at Transaction Level
November 20, 2011, 12:00am PST
Abstract models are necessary to assist system architects in the evaluation process of hardware/software architectures and to cope with the still increasing complexity of embedded systems....
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Whitepapers
Analytical Model of a Weighted Round Robin Service System
January 27, 2012, 12:00am PST
This paper presents a mathematical description of Weighted Round Robin service strategy, on which basis all the perspective QoS tools that serve to manage congestion in converged packet networks...
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Whitepapers
Minimum Symbol Error Probability MIMO Design Under the Per-Antenna Power Constraint
January 31, 2012, 12:00am PST
Approximate minimum symbol error probability transceiver design of single user MIMO systems under the practical per-antenna power constraint is considered. The upper bound of a lower bound on the...
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Whitepapers
UWB Localization System for Indoor Applications: Concept, Realization and Analysis
February 4, 2012, 12:00am PST
A complete impulse-based ultra-wideband localization demonstrator for indoor applications is presented. The positioning method, along with the method of positioning error predicting, based on...
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Whitepapers
All-Optical Fiber Interferometer-Based Methods for Ultra-Wideband Signal Generation
April 8, 2012, 12:00am PDT
The authors report two new, simple, and cost-effective all-optical methods to generate Ultra-WideBand (UWB) impulse radio signals. The proposed methods are based on fiber-interferometric...
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Whitepapers
An Adaptive Amplifier System for Wireless Sensor Network Applications
February 27, 2012, 12:00am PST
This paper presents an adaptive amplifier that is part of a sensor node in a wireless sensor network. The system presents a target gain that has to be maintained without direct human intervention...
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Whitepapers
Interference Cancellation Using Replica Signal for HTRCI-MIMO/OFDM in Time-Variant Large Delay Spread Longer Than Guard Interval
March 12, 2012, 12:00am PDT
Orthogonal Frequency Division Multiplexing (OFDM) and Multiple-Input Multiple-Output (MIMO) are generally known as the effective techniques for high data rate services. In MIMO/OFDM systems, the...
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Whitepapers
VLSI Architectures for Sliding-Window-Based Space-Time Turbo Trellis Code Decoders
April 4, 2012, 12:00am PDT
The ability of Turbo Codes (TCs) to achieve very low BER that approaches the Shannon limit is very attractive. These channel capacity approaching codes have been proposed by Berrou et al....
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Whitepapers
Compensation of Linear Multiscale Doppler for OFDM-Based Underwater Acoustic Communication Systems
May 21, 2012, 12:00am PDT
Several time-domain receivers that adopt coherent modulation with an emphasis on channel equalization in order to increase communication reliability have been suggested. However, the time-varying...
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Whitepapers
Robustness Maximization of Parallel Multichannel Systems
May 10, 2012, 12:00am PDT
Bit Error Rate (BER) minimization and SNR-gap maximization, two robustness optimization problems, are solved, under average power and bit-rate constraints, according to the water-filling policy....
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Whitepapers
Resource Management in Satellite Communication Systems: Heuristic Schemes and Algorithms
May 1, 2012, 12:00am PDT
The high cost of frequency bandwidth in satellite communication emphasizes the need for good algorithms to cope with the resource allocation problem. In systems using DVB-S2 links, the...
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Whitepapers
Measuring Biometric Sample Quality in Terms of Biometric Feature Information in Iris Images
May 22, 2012, 12:00am PDT
This paper develops an approach to measure the information content in a biometric feature representation of iris images. In this paper, the biometric feature information is calculated using the...
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Whitepapers
Performance Comparison of Doppler Scale Estimation Methods for Underwater Acoustic OFDM
April 5, 2012, 12:00am PDT
Doppler scale estimation is one critical step needed by the re-sampling operation in acoustic communication receivers. In this paper, the authors compare different Doppler scale estimation methods...
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Whitepapers
Comparison Study of Resource Allocation Strategies for OFDM Multimedia Networks
June 12, 2012, 12:00am PDT
Advanced MAC scheduling schemes provide efficient support of multimedia services in multiuser OFDM wireless networks. Designed in a cross layer approach, they opportunistically consider the...
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Whitepapers
Application of Perceptual Filtering Models to Noisy Speech Signals Enhancement
May 30, 2012, 12:00am PDT
This paper describes a new speech enhancement approach using perceptually based noise reduction. The proposed approach is based on the application of two perceptual filtering models to noisy...
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Whitepapers
Optimizing Spectrum Trading in Cognitive Mesh Network Using Machine Learning
May 16, 2012, 12:00am PDT
With the explosion of the number of emerging wireless applications for mobile users, the frequency spectrum has become congested to support the dramatic increase in the demand for the limited...
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Whitepapers
Information-Theoretic Analysis of Underwater Acoustic OFDM Systems in Highly Dispersive Channels
April 24, 2012, 12:00am PDT
This paper investigates the signal-to-interference ratio and the achievable rates of Underwater Acoustic (UA) OFDM systems over channels where time and frequency dispersion are high enough that:...
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Whitepapers
Analytical Evaluation of the Performance of Proportional Fair Scheduling in OFDMA-Based Wireless Systems
May 7, 2012, 12:00am PDT
This paper provides an analytical evaluation of the performance of Proportional Fair (PF) scheduling in Orthogonal Frequency-Division Multiple Access (OFDMA) wireless systems. OFDMA represents a...
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Whitepapers
Bit Rate Optimization with MMSE Detector for Multicast LP-OFDM Systems
April 21, 2012, 12:00am PDT
The authors propose a new resource allocation algorithm with Minimum Mean Square Error (MMSE) detector for multicast Linear Pre-coded Orthogonal Frequency Division Multiplexing (LP-OFDM) systems....
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Whitepapers
Virtual Network Embedding: A Hybrid Vertex Mapping Solution for Dynamic Resource Allocation
May 16, 2012, 12:00am PDT
Virtual Network Embedding (VNE) is a key area in network virtualization, and the overall purpose of VNE is to map virtual networks onto an underlying physical network referred to as a substrate....
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Whitepapers
Location-Aware Source Routing Protocol for Underwater Acoustic Networks of AUVs
September 6, 2012, 12:00am PDT
Acoustic networks of Autonomous Underwater Vehicles (AUVs) cannot typically rely on protocols intended for terrestrial radio networks. This paper describes a new Location-Aware Source Routing...
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Whitepapers
Video Compression Schemes Using Edge Feature on Wireless Video Sensor Networks
September 6, 2012, 12:00am PDT
A Wireless Video Sensor Network (WVSN) is a special kind of Wireless Sensor Network (WSN) that is capable of capturing video data at video sensor nodes (nodes have the equipment to capture video...
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Whitepapers
Performance Analysis of Different Types of Sensor Networks for Cognitive Radios
September 9, 2012, 12:00am PDT
Cognitive Radio (CR) is a potential technology for increasing spectral efficiency in wireless communications systems. In a cognitive radio system, secondary users temporarily use spectrum that is...
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Whitepapers
No-Reference Stereoscopic IQA Approach: from Nonlinear Effect to Parallax Compensation
September 22, 2012, 12:00am PDT
Three-Dimensional (3D) imaging has been an extensive research area, the application of which ranges from entertainment, such as videos and games, to specialized domains, such as education and...
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Whitepapers
A Semiparametric Model for Hyperspectral Anomaly Detection
August 1, 2012, 12:00am PDT
Using Hyper-Spectral (HS) technology, this paper introduces an autonomous scene anomaly detection approach based on the asymptotic behavior of a semi-parametric model under a multisampling testing...
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Whitepapers
On Asymptotic Analysis of Packet and Wormhole Switched Routing Algorithm for Application-Specific Networks-on-Chip
June 13, 2012, 12:00am PDT
Parallel Processing refers to the concept of speeding-up the execution of a program by dividing the program into multiple fragments that can execute simultaneously, each on its own processor. A...
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Whitepapers
Improved Maximum Likelihood S-FSK Receiver for PLC Modem in AMR
October 26, 2012, 12:00am PDT
This paper deals with an optimized software implementation of a narrowband power line modem. The modem is a node in Automatic Meter Reading (AMR) system compliant to IEC 61334-5-1 profile and...
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