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EURASIP
(114 results)-
White Papers
A SDR Platform for Mobile Wi-Fi/3G UMTS System on a Dynamic Reconfigurable Architecture
August 28, 2009, 12:00am PDT
As wireless communication standards evolve, Wi-Fi and WCDMA based 3G UMTS are still the major technologies widely deployed to provide high speed wireless internet access and mobile communication...
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White Papers
Joint Pre-Echo Control and Frame Erasure Concealment for VoIP Audio Codecs
August 28, 2009, 12:00am PDT
Pre-echo artifacts are a common problem of transform audio codecs owing to their comparatively large block lengths. If such codecs are used in Voice-over-IP (VoIP) applications, the concealment of...
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White Papers
Opportunistic Random Access for Distributed Parameter Estimation in Wireless Sensor Networks
September 7, 2007, 12:00am PDT
In this paper, the authors propose and analyze an opportunistic random access scheme suitable for distributed parameter estimation via Wireless Sensor Networks (WSN). At the Fusion Center (FC),...
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White Papers
A Clustering-Based Method for DoA Estimation in Wireless Communications
September 7, 2007, 12:00am PDT
A novel method for Direction Of Arrival (DOA) estimation of digitally modulated signals in wireless communication systems is presented. The method is based on the idea of exploiting the digital...
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White Papers
Distributed Source Coding: Theory and Applications
August 27, 2010, 12:00am PDT
Imagine a dense sensor network consisting of many tiny sensors deployed for information gathering. Readings from neighboring sensors will often be highly correlated. This can be exploited to...
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White Papers
Low Complexity Mean Enhanced Greedy Algorithms for Dynamic Subcarrier Allocation in Uplink LTE
August 27, 2010, 12:00am PDT
This paper proposes two lower complexity Mean Enhanced Greedy (MEG) algorithms for Dynamic Subcarrier Allocation (DSA) in uplink Long Term Evolution (LTE) systems. The computational savings are...
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White Papers
A Weighted Fastmap Algorithm For Wireless Sensor Nodes Localization
September 2, 2011, 12:00am PDT
In this paper a Weighted FastMap (WFM) algorithm is proposed in which more than one pair of anchor nodes is used to evaluate the one-dimensional coordinates of the unknown nodes while in the...
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White Papers
An Adaptive Modulation Precoding Scheme for Mean Ber Minimisation of ISI MIMO Channels
September 2, 2011, 12:00am PDT
This paper considers a non-linear precoding scheme with adaptive bit loading in order to minimise the average BER for a given target data rate when transmitting over a Frequency Selective (FS)...
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White Papers
Cognitive Control Channels for the Cooperation of Opportunistic and Composite Wireless Networks
September 2, 2011, 12:00am PDT
Opportunistic Networks (ONs) are considered as coordinated extensions of a radio access network infrastructure, which are dynamically and temporarily created in an infrastructure-less manner in...
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White Papers
Distributed Consensus-Based Tracking in Wireless Sensor Networks: A Practical Approach
September 2, 2011, 12:00am PDT
Tracking is a key application in Wireless Sensor and Ad-hoc Networks. The development of distributed, energy-efficient strategies for target tracking is of practical importance. In this...
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White Papers
Distributed Power and Routing Optimization in Single-Sink Data Gathering Wireless Sensor Networks
September 2, 2011, 12:00am PDT
This paper addresses a total transmission power minimization problem in single-sink data gathering wireless sensor network. The authors propose a distributed algorithm for solving the convex...
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White Papers
Energy-Efficient Positioning in Sensor Networks by a Game Theoretic Approach
September 2, 2011, 12:00am PDT
This paper investigates a game theoretical algorithm for positioning wireless nodes. The particular set-up considers a set of anchor sensor nodes, whose power levels are to be selected according...
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White Papers
Impact of Mobility on MIMO Green Wireless Systems
September 2, 2011, 12:00am PDT
This paper studies the impact of mobility on the power consumption of wireless networks. With increasing mobility, the authors show that the network should dedicate a non negligible fraction of...
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White Papers
Joint Sparse Signal Ensemble Reconstruction in a WSN Using Decentralized Bayesian Matching Pursuit
September 2, 2011, 12:00am PDT
Wireless networks comprised of low-cost sensory devices have been increasingly used in surveillance both at the civilian and military levels. Limited power, processing, and bandwidth resources is...
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White Papers
Modulation Detection in the Time-Frequency Domain for Cognitive Radio Systems
September 2, 2011, 12:00am PDT
Modulation detection, which is one of the major tasks of an intelligent receiver in cognitive radio communication systems, is an intermediate step between signal detection and demodulation. In...
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White Papers
Optimization of the Amplify-and-Forward in a Wireless Sensor Network Using Compressed Sensing
September 2, 2011, 12:00am PDT
In this paper, the authors study a novel compressed sensing technique applied to wireless sensor networks with a star topology. In particular, they propose an amplify-and-forward transmission...
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White Papers
Path Loss Factor Estimation for RSS-Based Localization Algorithms With Wireless Sensor Networks
September 2, 2011, 12:00am PDT
The authors address the problem of estimating the path loss factor and its integration in RSS-based localization algorithms with wireless sensor networks. They propose an algorithm that relies on...
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White Papers
Performance Analysis of a Distributed Robbins-Monro Algorithm for Sensor Networks
September 2, 2011, 12:00am PDT
The evolution of wireless communications is bringing into reality the dense deployment of femto and local area cells, which represents a challenging scenario for proving the effectiveness of...
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White Papers
Sparsity Based Adaptive Thresholding for DFE in SC-FDMA
September 2, 2011, 12:00am PDT
For single-carrier systems with frequency domain equalization, such as SC-FDMA, Decision Feedback Equalization (DFE) performs better than linear equalization and has much lower computational...
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White Papers
Tensor Coding for CDMA-MIMO Wireless Communication Systems
September 2, 2011, 12:00am PDT
In this paper, the authors propose a tridimensional tensor coding for Multiple-Input Multiple-Output (MIMO) communication systems. This coding allows spreading and multiplexing the transmitted...
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White Papers
Utility Based Cross-Layer Collaboration for Speech Enhancement in Wireless Acoustic Sensor Networks
September 2, 2011, 12:00am PDT
A wireless acoustic sensor network is considered that is used to estimate a desired speech signal that has been corrupted by noise. The application layer of the WASN derives an optimal filter in a...
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White Papers
Cooperative Localization Using Efficient Kalman Filtering for Mobile Wireless Sensor Networks
September 2, 2011, 12:00am PDT
The authors consider the problem of cooperative localization in mobile Wireless Sensor Networks (WSNs). To be able to continuously localize the mobile network, they propose to exploit the...
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White Papers
Cooperative MIMO Precoders for Energy-Efficient Transmission in Wireless Sensor Network
September 2, 2011, 12:00am PDT
Recent hardware advancements in Wireless Sensor Networks (WSN) allow more signal processing functionality to be integrated into a single sensor chip. A wide range of applications are envisioned...
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White Papers
Decentralized Phase Synchronization Scheme for Collaborative Beamforming in Wireless Sensor Networks
September 2, 2011, 12:00am PDT
In this paper, the authors propose a phase synchronization scheme suitable for collaborative beamforming with wireless sensor networks. The scheme does not require the BS to coordinate the...
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White Papers
A Constrained Tensor-Based Approach for MIMO NL-CDMA Systems
August 27, 2010, 12:00am PDT
In this paper, the authors propose a deterministic tensor-based approach for joint channel and symbol estimation in the context of multiuser multi-antenna (MIMO) CDMA communication systems. They...
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White Papers
Parity-Check Network Coding for Multiple Access Relay Channel in Wireless Sensor Cooperative Communications
April 12, 2010, 12:00am PDT
A recently developed theory suggests that network coding is a generalization of source coding and channel coding and thus yields a significant performance improvement in terms of throughput and...
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White Papers
Reference Chaser Bandwidth Controller for Wireless QoS Mapping Under Delay Constraints
October 11, 2010, 12:00am PDT
Telecommunications networks are composed of functional layers acting in cascade. Quality of Service (QoS) derives from the action of each layer that must assure a specific level of quality to the...
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White Papers
Code Combination for Blind Channel Estimation in General MIMO-STBC Systems
January 21, 2009, 12:00am PST
The problem of blind channel estimation under Space-Time Block Coded (STBC) transmissions is addressed. Firstly, a blind channel estimation criterion that generalizes previous works is proposed....
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White Papers
Performance Analysis of SNR-Based Scheduling Policies in Asymmetric Broadcast Ergodic Fading Channel
January 26, 2009, 12:00am PST
The authors analyze the performance of SNR-based scheduling algorithms in broadcast ergodic fading channels where multiuser selection diversity is exploited. At each channel state, the user with...
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White Papers
QoS-Aware Maximally Disjoint Routing in Power-Controlled Multihop CDMA Wireless Ad Hoc Networks
March 25, 2007, 12:00am PDT
A joint power control and maximally disjoint routing algorithm is proposed for multi-hop CDMA wireless ad hoc networks. A framework of power control with QoS constraints in CDMA wireless ad hoc...
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White Papers
Uncertainty Area-Based Interference Mitigation for Cognitive Radio
November 21, 2011, 12:00am PST
A new interference mitigation approach is presented for a Mobile Ad Hoc NETwork (MANET), acting as a secondary wireless network, which takes advantage of smart antennas and cognitive radio...
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White Papers
Enhancement of Unequal Error Protection Properties of LDPC Codes
October 2, 2007, 12:00am PDT
It has been widely recognized in the literature that irregular Low-Density Parity-Check (LDPC) codes exhibit naturally an Unequal Error Protection (UEP) behavior. In this paper, the authors...
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White Papers
Random Field Estimation with Delay-Constrained and Delay-Tolerant Wireless Sensor Networks
May 3, 2010, 12:00am PDT
In this paper, the authors study the problem of random-field estimation with wireless sensor networks. They consider two encoding strategies, namely, Compress-and-Estimate (C&E) and...
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White Papers
Energy Efficiency Optimization of Cooperative Communication in Wireless Sensor Networks
April 25, 2010, 12:00am PDT
In Wireless Sensor Networks (WSNs), cooperative communication represents a potential candidate to combat the effects of channel fading by exploiting diversity gain achieved via cooperation among...
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White Papers
Towards Hume Simd Vectorisation
August 28, 2009, 12:00am PDT
Hume is a novel formally-motivated programming language oriented to developing software where strong assurance of resource use is paramount, in particular embedded systems. In this paper, the...
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White Papers
Sparsening Filter Design for Iterative Soft-Input Soft-Output Detectors
February 29, 2012, 12:00am PST
A large body of research exists around the idea of channel shortening, where a prefilter is designed to reduce the effective channel impulse response to some smaller number of contiguous taps....
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White Papers
Determinant-Based MIMO Scheduling With Reduced Pilot Overhead
February 29, 2012, 12:00am PST
In a MultiUser Multiple-Input Multiple-Output (MU-MIMO) cellular system where there are many candidate users, it is critical to select a user group which maximizes the overall throughput of the...
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White Papers
HopScotch-A Low-Power Renewable Energy Base Station Network for Rural Broadband Access
March 16, 2012, 12:00am PDT
The provision of adequate broadband access to communities in sparsely populated rural areas has in the past been severely restricted. In this paper, the authors present a wireless broadband access...
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White Papers
Joint Resource Allocations for Remote Radio Head Deployments With Coherent Transmitter
March 15, 2012, 12:00am PDT
To deal with the future high demands of wireless traffic and energy consumption, one type of heterogeneous deployments is to distribute the base station antennas throughout the entire cell, which...
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White Papers
Performance of MIMO Systems in Measured Indoor Channels With Transmitter Noise
March 15, 2012, 12:00am PDT
This paper analyzes the impact of transmitter noise on the performance of Multiple-Input Multiple-Output (MIMO) systems with linear and nonlinear receivers and precoders. The authors show that the...
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White Papers
SoS-Based Blind Channel Estimation in Multiuser Space-Time Block Coded Systems
September 12, 2007, 12:00am PDT
In this paper the problem of blind channel estimation in multiuser Space-Time Block Coded (STBC) systems is considered. Specifically, a new blind channel estimation technique is proposed. The...
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White Papers
Testing Quaternion Properness: Generalized Likelihood Ratios and Locally Most Powerful Invariants
September 2, 2011, 12:00am PDT
This paper considers the problem of determining whether a quaternion random vector is proper or not, which is an important problem because the structure of the optimal linear processing depends on...
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White Papers
A Real Orthogonal Space-Time Coded UWB Scheme for Wireless Secure Communications
July 21, 2009, 12:00am PDT
Recent research reveals that information security and information-hiding capabilities can be enhanced by proper exploitation of space-time techniques. Meanwhile, intrinsic properties of...
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White Papers
Joint Estimation of Mutual Coupling, Element Factor and Phase Center in Antenna Arrays
August 1, 2007, 12:00am PDT
A novel method is proposed for estimation of the mutual coupling matrix of an antenna array. The method extends previous work by incorporating an unknown phase center and the element factor...
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White Papers
Power Spectral Density Error Analysis of Spectral Subtraction Type of Speech Enhancement Methods
July 16, 2006, 12:00am PDT
A theoretical framework for analysis of speech enhancement algorithms is introduced for performance assessment of spectral subtraction type of methods. The quality of the enhanced speech is...
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White Papers
Network Coding-Based Multipath Routing for Energy Efficiency in Wireless Sensor Networks
March 23, 2012, 12:00am PDT
This paper studies the energy efficiency of wireless sensor networks with Network Coding-based Multipath Routing (NCMR). The employed multipath model is braided multipath model, and the network...
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White Papers
Evaluation of CACC String Stability Using SUMO, Simulink, and OMNeT++
March 23, 2012, 12:00am PDT
Recent development in wireless technology enables communication between vehicles. The concept of Co-operative Adaptive Cruise Control (CACC) - which uses wireless communication Recent development...
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White Papers
Application of MIH for the Lightweight Deployment of LTE-Advanced Systems Through Mobile Relaying
March 26, 2012, 12:00am PDT
In a conventional cellular network end users connect directly to a Base Station (BS). Mobile relaying allows establishing an indirect two-hop link between the end user, called Mobile Node (MN),...
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White Papers
Design and Implementation of a Distributed Fall Detection System Based on Wireless Sensor Networks
March 27, 2012, 12:00am PDT
Pervasive healthcare is one of the most important applications of the Internet of Things (IoT). As part of the IoT, the Wireless Sensor Networks (WSNs) are responsible for sensing the abnormal...
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White Papers
Modeling Interaction Using Trust and Recommendation in Ubiquitous Computing Enivornment
March 27, 2012, 12:00am PDT
To secure computing in pervasive environment, an adaptive trust and recommendation based access control model (based on human notion of trust) is proposed. The proposed model provides support to...
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White Papers
The Significant Impact of a Set of Topologies on Wireless Sensor Networks
March 27, 2012, 12:00am PDT
Routing and topology control for Wireless Sensor Networks (WSNs) is significantly important to achieve energy efficiency in resource-constrained WSNs, and high-speed packet delivery. In this...
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White Papers
Using RELOAD and CoAP for Wide Area Sensor and Actuator Networking
March 27, 2012, 12:00am PDT
In this paper, the authors propose a new architecture for wide area sensor and actuator networking. The architecture is based on combining two protocols being standardized by the Internet...
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White Papers
Binary Biometric Representation Through Pairwise Adaptive Phase Quantization
January 24, 2011, 12:00am PST
Extracting binary strings from real-valued biometric templates is a fundamental step in template compression and protection systems, such as fuzzy commitment, fuzzy extractor, secure sketch, and...
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White Papers
Research of Spatial Domain Image DigitalWatermarking Payload
February 21, 2011, 12:00am PST
Watermarking payload is a topic in which the watermarking researchers have a great interest at present. Based on the constraint of "Perceptual invisibility," this paper makes a study of the...
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White Papers
PhishGILLNET - Phishing Detection Using Probabilistic Latent Semantic Analysis
March 26, 2012, 12:00am PDT
Identity theft is one of the most profitable crimes committed by felons. In the cyber space, this is commonly achieved using phishing. The authors propose here robust server side methodology to...
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White Papers
RFTraffic: A Study of Passive Traffic Awareness Using Emitted RF Noise From the Vehicles
January 10, 2012, 12:00am PST
In this paper, a new traffic sensing and monitoring technique is introduced which works based on the emitted RF noise from the vehicles. In comparison with the current traffic sensing systems, the...
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White Papers
Recursive Analytical Performance Evaluation of Broadcast Protocols With Silencing: Application to VANETs
January 12, 2012, 12:00am PST
In this paper, the authors present a novel theoretical framework suitable for analytical performance evaluation of a family of multihop broadcast protocols. The framework allows to derive several...
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White Papers
Resource Reservation for Mobile Hotspots in Vehicular Environments With Cellular/WLAN Interworking
January 17, 2012, 12:00am PST
Nowadays, the pervasive wireless networks enable ubiquitous high-rate wireless access from everywhere. There have been extensive studies on interworking of complementary wireless technologies in...
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White Papers
Resource Allocation for Asymmetric Multi-Way Relay Communication Over Orthogonal Channels
January 18, 2012, 12:00am PST
The authors consider the wireless communication of common information between several terminals with the help of a relay as it is for example required for a video conference. The transmissions of...
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White Papers
An Overview of Learning Mechanisms for Cognitive Systems
January 19, 2012, 12:00am PST
Cognitive systems were first introduced by Mitola and in the last decade they have proved to be beneficial in self-management functionalities of future generation networks. The advantages and the...
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White Papers
On the First-And Second-Order Statistics of the Capacity of N Nakagami-M Channels for Applications in Cooperative Networks
January 20, 2012, 12:00am PST
This paper deals with the derivation and analysis of the statistical properties of the instantaneous channel capacity of N Nakagami-m channels, which has been recently introduced as a suitable...
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White Papers
Adaptive Access and Rate Control of CSMA for Energy, Rate, and Delay Optimization
January 30, 2012, 12:00am PST
In this paper, the authors present a cross-layer adaptive algorithm that dynamically maximizes the average utility function. A per stage utility function is defined for each link of a carrier...
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White Papers
Design and Performance Evaluation of a Lightweight Wireless Early Warning Intrusion Detection Prototype
March 1, 2012, 12:00am PST
The proliferation of wireless networks has been remarkable during the last decade. The license-free nature of the ISM band along with the rapid proliferation of the Wi-Fi-enabled devices,...
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White Papers
Towards an Optimal Lifetime in Heterogeneous Surveillance Wireless Sensor Networks
March 1, 2012, 12:00am PST
In this paper, the authors study the coverage problem for heterogeneous wireless sensor networks where different targets need to be covered (sensed) by different types of wireless sensors running...
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White Papers
Iterative Receivers With Channel Estimation for Multi-User MIMO-OFDM: Complexity and Performance
March 1, 2012, 12:00am PST
A family of iterative receivers is evaluated in terms of complexity and performance for the case of an uplink Multi-User (MU) Multiple-Input Multiple-Output Orthogonal Frequency Division...
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White Papers
Epidemic Theory Based H+1 Hop Forwarding for Intermittently Connected Mobile Ad Hoc Networks
March 1, 2012, 12:00am PST
In intermittently connected mobile ad hoc networks, how to guarantee the packet delivery ratio and reduce the transmission delay has become the new challenge for the researchers. Epidemic theory...
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White Papers
On Energy-Efficient TCP Traffic Over Wireless Cooperative Relaying Networks
March 2, 2012, 12:00am PST
Cooperative relay is a promising technology to provide better end-to-end performance for wireless communication through spatial diversity. Most of previous study on relay networks concentrates on...
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White Papers
Mashing Up the Internet of Things: A Framework for Smart Environments
March 2, 2012, 12:00am PST
Along with the advent of the Web 2.0 came a rich ecosystem of application services allowing developers to use the functionality provided by Web applications into their own customized solutions....
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White Papers
Training Design for Precoded BICM-MIMO Systems in Block-Fading Channels
March 4, 2012, 12:00am PST
In order to improve bandwidth efficiency and error performance, a new training scheme is proposed for Bit-Interleaved-Coded Modulation in Multiple-Input Multiple-Output (BICM-MIMO) systems....
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White Papers
Effects Analysis of Imperfections on Multi-Antenna Transceiving Systems
March 5, 2012, 12:00am PST
Multi-antenna transceiving systems are widely used in high speed wireless communications due to its higher efficiency comparing to its traditional single-antenna counterparts. In this paper, the...
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White Papers
Delay Tolerant (delto) Distributed TAST Codes for Cooperative Wireless Networks
March 5, 2012, 12:00am PST
In a distributed cooperative communication system, as the distances between different relay nodes and the receiving nodes may be different, so the performances of distributed space time codes at...
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White Papers
An Energy Efficient MCDS Construction Algorithm for Wireless Sensor Networks
March 6, 2012, 12:00am PST
In wireless sensor network, a Connected Dominating Set (CDS) can be used as a virtual backbone for efficient routing. Constructing a Minimal CDS (MCDS) is good for packet routing and energy...
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White Papers
Simplifying the Propagation Environment Representation for LMS Channel Modelling
March 15, 2012, 12:00am PDT
A deep knowledge of all propagation effects has become an essential issue to design future communication and navigation systems and optimise their performances. Here, the authors will target Land...
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White Papers
A SIMO One-Bit Time Reversal for UWB Communication Systems
March 20, 2012, 12:00am PDT
With the One-bit Time Reversal Ultra WideBand (OTR-UWB) transceiver, the data symbols are encoded using the reversed order of the channel phase. The major factor limiting SISO OTR capacity and...
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White Papers
Reconfigurable Parasitic Antennas for Compact Mobile Terminals in Multiuser Wireless Systems
March 2, 2012, 12:00am PST
This paper considers the exploitation of parasitic antenna arrays in Multi-User (MU) wireless communication systems by using their adaptive beamforming capabilities in order to improve the average...
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White Papers
Statistical Analysis of Linear Spatial Holes Estimators in Cognitive Radio
February 5, 2012, 12:00am PST
One of key features of Cognitive Radio (CR) networks is environment awareness which is having knowledge of such parameters as spatial holes. This information is employed to exploit the spatial...
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White Papers
A Power Efficient MAC Protocol for Wireless Body Area Networks
February 6, 2012, 12:00am PST
Applications of wearable and implanted wireless sensor devices are hot research area. A specialized field called the Body Area Networks (BAN) has emerged to support this area. Managing and...
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White Papers
Low-Complexity Multiuser MIMO Downlink System Based on a Small-Sized CQI Quantizer
February 8, 2012, 12:00am PST
It is known that the conventional semi-orthogonal user selection based on a greedy algorithm cannot provide a globally optimal solution due to its semi-orthogonal property. To find a more optimal...
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White Papers
Multiuser Diversity in Correlated Rayleigh-Fading Channels
March 8, 2012, 12:00am PST
This paper studies the effect of scheduling and multiuser diversity on the performance of correlated Rayleigh-fading channels. More specifically, the power-limited channel average rate is obtained...
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White Papers
Joint Cross-Layer Resource Allocation and Interference Avoidance With QoS Support for Cognitive Radio Systems
February 9, 2012, 12:00am PST
In this paper, the authors study the coexistence and optimization of a centralized orthogonal frequency-division multiple access-based Multiuser Cognitive Radio (MCR) system which coexists with a...
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