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Institute of Electrical & Electronic Engineers
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Distributed Interference Cancellation for Cognitive Radios Using Periodic Signals of the Primary System
June 27, 2011, 12:00am PDT
This paper considers secondary usage of spectrum resources that are allocated to Frequency Division Duplexing (FDD)-based cellular systems. The authors propose an interference cancellation...
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Probabilistic RFID Tag Detector Model
February 11, 2011, 12:00am PST
The objective of this paper is to derive the channel transition probabilities for the reader-to-tag link in RFID, considering the peculiar receiver structure in a RFID tag. The model is a first...
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On Array-Processing Based Quasi-Orthogonal Space-Time Block-Coded OFDM Systems
January 1, 2010, 12:00am PST
In this paper, the authors propose a Quasi-Orthogonal Space - Time Block Coding (QO-STBC) Orthogonal Frequency-Division Multiplex (OFDM) scheme for its application in frequency-selective channels....
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A New Ray Optical Statistical Model for Multipath Characteristics Pertinent to Indoor Geolocation
May 7, 2009, 12:00am PDT
A ray optics based statistical multipath channel model has been developed to describe the indoor multipath propagation including the important parameters such as path gain, time-of-arrival,...
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Identification of the Absence of Direct Path in Indoor Localization Systems
November 27, 2007, 12:00am PST
Ultra-WideBand (UWB) indoor positioning systems based on Time of Arrival (TOA) techniques are considered to be the high precision alternatives to those employing Received Signal Strength (RSS) or...
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A New Spatial Path Persistency Model for TOA-Based Indoor Geolocation
April 1, 2009, 12:00am PDT
Analysis of the persistency and birth/death of multipath components of the channel impulse response is essential for performance evaluation of indoor geolocation algorithms using indirect paths...
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Measurement and Modeling of Ultrawideband TOA-Based Ranging in Indoor Multipath Environments
March 1, 2009, 12:00am PST
In this paper, the authors present the results of the measurement and modeling of UltraWideBand (UWB) Time Of Arrival (TOA)-based ranging in different indoor multipath environments. They provide a...
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A Markov Model for Dynamic Behavior of Ranging Errors in Indoor Geolocation Systems
December 1, 2007, 12:00am PST
Recently, considerable attention has been devoted to modeling and analysis of the behavior of the ranging error in indoor environment. The ranging error modeling is essential in design of precise...
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Analysis of Time of Arrival Estimation Using Wideband Measurements of Indoor Radio Propagations
October 1, 2007, 12:00am PDT
Using Time Of Arrival (TOA) to determine the distance between the transmitter and the receiver is the most popular technique for accurate indoor positioning. The accuracy of measuring the distance...
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Subspace-Based Blind Channel Estimation for MIMO-OFDM Systems With Reduced Time Averaging
April 12, 2010, 12:00am PDT
Among the various approaches recently proposed for blind estimation of wideband Multiple-Input - Multiple-Output (MIMO) wireless channels, subspace-based algorithms are particularly attractive due...
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Subspace Tracking of Fast Time-Varying Channels in Precoded MIMO-OFDM Systems
June 18, 2009, 12:00am PDT
This paper presents a blind subspace-based tracking scheme for precoded MIMO-OFDM systems over rapidly time-varying wireless channels. Subspace-based tracking is normally considered for slow...
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Group-Based Block Linear Successive Interference Cancellation for DS-CDMA
June 19, 2009, 12:00am PDT
Mobile communication systems based on DS-CDMA suffer from Multiple Access Interference (MAI), which limits the system capacity. Several techniques, such as beamforming with multiple antennas and...
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Dual Transform Domain Echo Canceller for Discrete Multitone Systems
April 12, 2010, 12:00am PDT
In communication systems where full-duplex transmission is required, digital echo cancellers are employed to cancel echo by means of adaptive filtering. In order to reduce the computational...
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A Subspace Method for the Blind Identification of Multiple Time-Varying Fir Channels
April 12, 2010, 12:00am PDT
A new method is proposed for the blind subspace-based identification of the coefficients of Time-Varying (TV) Single-Input Multiple-Output (SIMO) FIR channels. The TV channel coefficients are...
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Cooperative MIMO-Beamforming for Multiuser Relay Networks
June 18, 2009, 12:00am PDT
In this paper, the authors develop a beamforming algorithm for multiuser MIMO-relaying wireless systems. They consider a relaying scenario with multiple sources transmitting to one or more...
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MMSE Equalization for Zero Padded Multicarrier Systems With Insufficient Guard Length
June 18, 2009, 12:00am PDT
The authors derive a block linear MMSE equalizer suitable for zero padded multicarrier systems with insufficient guard length. The proposed equalizer is not limited to systems using the IFFT/FFT...
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One-Tap Equalizer for Perfect Reconstruction DFT Filter Bank Transceivers
June 18, 2009, 12:00am PDT
In this paper, the authors investigate a simple equalization method for DFT filter bank transceivers. They assume the presence of Perfect Reconstruction (PR) DFT filter banks and make use of this...
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On Convergence Properties of Subspace Trackers Based on Orthogonal Iteration
November 12, 2009, 12:00am PST
This paper studies convergence properties of subspace trackers using orthogonal iteration. In the context of blind estimation of a time-varying channel, orthogonal iteration and its variants have...
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An Improved Implementation for an Auditory-Inspired FFT Model With Application in Audio Classification
June 18, 2009, 12:00am PDT
In this paper, the authors present an improved implementation for an auditory-inspired FFT-based model which calculates a noise-robust FFT spectrum. Through the use of Characteristic Frequency...
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Further Studies of a FFT-Based Auditory Spectrum With Application in Audio Classification
June 18, 2009, 12:00am PDT
In this paper, the noise-robustness of a recently proposed Fast Fourier Transform (FFT)-based Auditory Spectrum (FFT-AS) is further evaluated through speech/music/noise classification experiments...
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White Papers
Group-Based Linear Parallel Interference Cancellation for DS-CDMA Systems
June 19, 2009, 12:00am PDT
The increase in the demand for voice and data wireless services creates a need for a more efficient use of the available bandwidth. Current and future generations cellular systems based on DS-CDMA...
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Adaptive Training-Based Collaborative MIMO Beamforming for Multiuser Relay Networks
June 18, 2009, 12:00am PDT
In this paper, the authors consider a cooperative relaying scenario with multiple sources transmitting to one or more destination nodes through several relay terminals. Each relay is equipped with...
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White Papers
Subspace Blind MIMO-OFDM Channel Estimation With Short Averaging Periods: Performance Analysis
June 18, 2009, 12:00am PDT
Among all blind channel estimation problems, subspace-based algorithms are attractive due to its fast-converging nature. It primarily exploits the orthogonality structure of the noise and signal...
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Bayesian Spectral Amplitude Estimation for Speech Enhancement With Correlated Spectral Components
November 12, 2009, 12:00am PST
In Bayesian Short-Time Spectral Amplitude (STSA) estimation for single channel speech enhancement, the spectral components are traditionally assumed to be uncorrelated. However, this assumption is...
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Availability-Aware Provisioning Strategies for Differentiated Protection Services in Wavelength-Convertible WDM Mesh Networks
March 11, 2010, 12:00am PST
In an optical WDM mesh network, different protection schemes (such as dedicated or shared protection) can be used to improve the service availability against network failures. However, in order to...
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On the Level of Guaranteed Services for Signaling Control in Cellular Networks
October 6, 2009, 12:00am PDT
In this paper, the authors discuss their preliminary work on signaling overload control for cellular services which requires adaptability and scalability as well as guaranteed level of service....
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On the Benefits of a Fast Heuristic for Backup Reprovisioning in WDM Networks
October 29, 2008, 12:00am PDT
In a Wavelength-Division-Multiplexing (WDM) optical network, Backup Reprovisioning (BR) provides a means to improve survivability (by protecting against multiple concurrent potential failures) and...
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A Devs-Based Framework for Simulation Optimization: Case Study of Link-11 Gateway Parameter Tuning
September 24, 2008, 12:00am PDT
Discrete EVent System Specifications (DEVS) is a mathematical formalism based on system theoretic principles, which has evolved with state-of-technologies implementation over the past few decades....
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A Self-Organized Uplink Power Control for Cross-Tier Interference Management in Femtocell Networks
October 7, 2008, 12:00am PDT
This paper proposes two interference mitigation strategies that adjust the maximum transmit power of femtocell users to suppress the cross-tier interference at a macrocell Base Station (BS). The...
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Asymptotically Optimal Resource Allocation in OFDM-Based Cognitive Networks With Multiple Relays
December 21, 2011, 12:00am PST
In this paper, the problem of resources allocation in Decode-and-Forward (DF) relayed OFDM based cognitive system is considered. The dual decomposition technique is adopted to obtain an...
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On the Estimation of Randomly Sampled 2D Spatial Fields Under Bandwidth Constraints
August 31, 2011, 12:00am PDT
In this paper, the authors address the problem of the estimation of a spatial field defined over a two-dimensional space with wireless sensor networks. They assume that the field is (spatially)...
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Whitepapers
Satellite Radiolocalization From GPS to GNS Sand Beyond: Novel Technologies and Applications for Civil Mass Market
November 1, 2011, 12:00am PDT
It is known that satellite radio-localization was born in the military environment and was originally conceived for defense purposes. Nevertheless, the commercial explosion (dated to 20 years ago)...
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Frequency Domain Joint TOA and DOA Estimation in IR-UWB
October 1, 2011, 12:00am PDT
This paper addresses the problem of TOA and DOA estimation in IR-UWB systems. It considers a frequency domain approach for joint high resolution estimation of Time Of Arrival (TOA) and Direction...
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Saturation Throughput Performance Analysis of a Medium Transparent MAC Protocol for 60 GHz Radio-Over-Fiber Networks
December 15, 2011, 12:00am PST
The authors describe an analytical model for calculating the saturation throughput performance of a medium transparent Medium Access Control (MAC) protocol in 60 GHz Radio-over-Fiber (RoF)...
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Secure Resource Allocation and Scheduling for OFDMA Decode-and-Forward Relay Networks
October 1, 2011, 12:00am PDT
In this paper, the authors formulate an optimization problem for secure resource allocation and scheduling in Orthogonal Frequency Division Multiple Access (OFDMA) half-duplex Decode-and-Forward...
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DTV Band Micropower RF Energy-Harvesting Circuit Architecture and Performance Analysis
November 2, 2011, 12:00am PDT
This paper has firstly, presented a rectenna circuit which has measured RF-to-DC conversion efficiency equal to 18.2% given -20 dBm, 550 MHz single tone excitation. The rectified voltage given a...
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Optimal Power Allocation Algorithm for OFDM-Based Decode-and-Forward Dual-Hop Cognitive Systems
December 5, 2011, 12:00am PST
Relayed transmission is a promising technique to increase coverage and achievable capacity of the communication systems. A cognitive OFDM-based Decode-and-Forward (DF) cooperative relay network is...
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Optimal Resource Allocation in Multi-Relay Cognitive Networks Using Dual Decomposition
December 2, 2011, 12:00am PST
In this paper, an OFDM-based multi-relay cognitive radio network is considered where the relays use the decode-and-forward protocol to assist the source to relay transmission. The objective is to...
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Sparse Channel Estimation Based on Compressed Sensing for Ultra WideBand Systems
December 21, 2011, 12:00am PST
Channel estimation for purposes of equalization is a long standing problem in signal processing. Wireless propagation is characterized by sparse channels, that is channels whose time domain...
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U-Band Micromachined Coaxial Filter
August 9, 2011, 12:00am PDT
This paper presents a micro-machined filter for millimeter-wave applications operating at U-band. The structure was designed using a rectangular coaxial line with the center conductor suspended in...
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Secure Location Verification for Vehicular Ad-Hoc Networks
October 29, 2008, 12:00am PDT
In this paper, the authors examine one of the security issues in Vehicular Ad-hoc NETwork (VANETs): position-spoofing attack. They propose a novel Secure Location Verification (SLV) scheme to...
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Multiuser Diversity in Wireless Ad Hoc Networks
October 29, 2008, 12:00am PDT
This paper studies the throughput scaling in the limit of large networks for a previously published two-hop opportunistic relaying protocol for more general fading conditions. In the Rayleigh...
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Tiling-Based Localization Scheme for Sensor Networks Using a Single Beacon
October 29, 2008, 12:00am PDT
The authors propose and evaluate a new localization protocol for sensor networks. Contrary to most current localization schemes, this protocol relies on the existence of only a single beacon node....
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On the Impact of Realism of Mobility Models for Wireless Networks
October 29, 2008, 12:00am PDT
The authors present PedSims, a suite of mobility models spanning the entire range from the classic Random WayPoint (RWP), to correlated movement, to trace-level-quality social-activity-based...
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A Self-X Approach to OLSR Routing Protocol in Large-Scale Wireless Mesh Networks
October 29, 2008, 12:00am PDT
Wireless mesh networks constitute an emerging technology that is quickly gaining popularity due to its countless advantages in terms of coverage area and low implementation cost. Wireless mesh...
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MIMI: Mitigating Packet Misrouting in Locally- Monitored Multi-Hop Wireless Ad Hoc Networks
October 29, 2008, 12:00am PDT
The local monitoring has been demonstrated as a powerful technique for mitigating security attacks in multi-hop ad-hoc networks. In local monitoring, nodes overhear partial neighborhood...
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Cache-Based Content Delivery in Opportunistic Mobile Ad Hoc Networks
October 29, 2008, 12:00am PDT
Over the last few years, multimedia content sharing through different service providers have gained popularity among the Internet users. The development of wireless mobile devices with enhanced...
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Bootstrapping P2P Overlays in MANETs
October 29, 2008, 12:00am PDT
Peer-to-peer networks are very popular but the problem of bootstrapping them has largely been ignored. In a fully decentralized environment such as a Mobile Ad hoc NETwork (MANET) the usual...
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Security-Aware Topology Control for Wireless Ad-Hoc Networks
October 29, 2008, 12:00am PDT
This paper presents a security-aware topology control scheme for wireless ad-hoc networks. The proposed topology algorithm builds a connected network based on the security level of each node, in...
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A Domination Approach to Clustering Nodes for Data Aggregation
October 29, 2008, 12:00am PDT
The authors present a systematic approach to selecting cluster heads in regular mesh topologies based on the idea of k-Domination in graphs. Given a graph, G=(V,E), a subset D of V is said to be a...
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Data Collection Using RFID and a Mobile Reader
October 29, 2008, 12:00am PDT
The widespread acceptance of RFID tags in inventory control applications has allowed the development of increasingly complex and useful inventory management techniques. This paper approaches the...
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Exploiting Affinity Propagation for Energy-Efficient Information Discovery in Sensor Networks
October 29, 2008, 12:00am PDT
Wireless Sensor Networks (WSN) are attractive for information gathering in large-scale data rich environments. Emerging WSN applications require dissemination of information to interested clients...
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A Mobility Prediction-Based Adaptive Data Gathering Protocol for Delay Tolerant Mobile Sensor Network
October 29, 2008, 12:00am PDT
The basic operation of Delay Tolerant Mobile Sensor Network (DTMSN) is for pervasive data gathering in networks with intermittent connectivity, where traditional data gathering methods can not be...
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A New Data Gathering Scheme Based on Set Cover Algorithm for Mobile Sinks in WSNs
October 29, 2008, 12:00am PDT
Recent Advances in solid state and packaging technologies have enabled production of more efficient and reasonably small devices such as Micro Electro Mechanical Systems (MEMS). Wireless Sensor...
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EEBASS: Energy-Efficient Balanced Storage Scheme for Sensor Networks
October 29, 2008, 12:00am PDT
Data-centric storage is an effective and important technique in sensor networks, however, most data-centric storage schemes may not be energy efficient and load balanced due to non-uniform event...
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Joint Scheduling and Rate Control Algorithms for Stable Throughput Maximization Under Channel Estimation in Single-Hop Wireless Networks
October 29, 2008, 12:00am PDT
The authors characterize the stability region of wireless, single-hop networks with time-varying imperfect channels. They define a joint scheduling and transmission rate control policy that...
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Joint Tx and Rx IQ Imbalance Compensation of OFDM Transceiver in Mesh Network
October 29, 2008, 12:00am PDT
The direct conversion is an attractive architecture, as compared to the traditional heterodyne approach, for both transmitter and receiver design. In spite of its great advantages in hardware...
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Sparse Signal Reconstruction From Quantized Noisy Measurements Via GEM Hard Thresholding
May 1, 2012, 12:00am PDT
The authors develop a Generalized Expectation-Maximization (GEM) algorithm for sparse signal reconstruction from quantized noisy measurements. The measurements follow an underdetermined linear...
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Variance-Component Based Sparse Signal Reconstruction and Model Selection
June 1, 2010, 12:00am PDT
The authors propose a variance-component probabilistic model for sparse signal reconstruction and model selection. The measurements follow an underdetermined linear model, where the unknown...
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Decentralized Random-Field Estimation for Sensor Networks Using Quantized Spatially Correlated Data and Fusion-Center Feedback
December 1, 2008, 12:00am PST
In large-scale wireless sensor networks, sensor-processor elements (nodes) are densely deployed to monitor the environment; consequently, their observations form a random field that is highly...
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Dynamic Field Estimation Using Wireless Sensor Networks: Tradeoffs Between Estimation Error and Communication Cost
January 5, 2010, 12:00am PST
This paper concerns the problem of estimating a spatially distributed, time-varying random field from noisy measurements collected by a wireless sensor network. When the field dynamics are...
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Adaptive Sensor Activation for Target Tracking in Wireless Sensor Networks
July 22, 2012, 12:00am PDT
This paper presents an adaptive sensor activation for target tracking in wireless sensor networks by dynamically adjusting the range of sensor selective activation instead of fixed one. A...
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On the Achievable Throughput of Multi-Band Multi-Antenna Wireless Mesh Networks
October 29, 2008, 12:00am PDT
Recent technological advances have enabled SDRs to switch from one frequency to another at low cost, thus making dynamic multi-band access possible. On the other hand, recent advances in signal...
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Design of Wireless Mesh Networks: Expansion and Reliability Studies
October 29, 2008, 12:00am PDT
The authors' goal is to propose a unified/generalized model for the Wireless Mesh Networks (WMNs) design problem taking into account all the parameters that have a significant impact on WMNs. In...
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An Architecture for Survivable Mesh Networking
October 29, 2008, 12:00am PDT
Wireless mesh networks have gained increasing interests, but the lack of security guarantee has retarded their deployment. Security solutions have applied preventive or reactive mechanisms, being...
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Efficient Broadcast in Wireless Ad Hoc Networks With a Realistic Physical Layer
October 29, 2008, 12:00am PDT
To minimize energy consumption, efficient broadcasting in ad hoc networks requires the selection of small sets of forwarding nodes and the use of small transmission radii. However, the...
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Antenna Selection Diversity Based MAC Protocol for MIMO Ad Hoc Wireless Networks
October 29, 2008, 12:00am PDT
In this paper, the authors propose a novel asynchronous Media Access Control (MAC) protocol, Opportunistic MAC (OMAC), for Multiple Input Multiple Output (MIMO) ad-hoc networks. The proposed...
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Spatial Interference Cancellation for Mobile Ad Hoc Networks: Perfect CSI
October 29, 2008, 12:00am PDT
Interference between nodes directly limits the capacity of mobile ad hoc networks. This paper focuses on spatial interference cancellation with perfect Channel State Information (CSI), and...
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On Physical-Aware Directional MAC Protocol for Indoor Wireless Networks
October 29, 2008, 12:00am PDT
Exploiting antenna directionality provides significant improvements in terms of spatial reuse, in comparison to omni-directional antennas, leading to higher network capacity. However, this...
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RPB-MD: A Novel Robust Message Dissemination Method for VANETs
October 29, 2008, 12:00am PDT
Robust multi-hop message dissemination in Vehicular Ad hoc NETworks (VANETs) is challenging due to the high mobility and frequent partitioning. In this paper, the authors propose a novel scheme...
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ECMV: Efficient Certificate Management Scheme for Vehicular Networks
October 29, 2008, 12:00am PDT
In this paper, the authors propose an Efficient Certificate Management scheme for Vehicular networks (ECMV). The proposed scheme offers a flexible interoperability for certificate management in...
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A Tree-Based Signature Scheme for VANETs
October 29, 2008, 12:00am PDT
In this paper, the authors propose a robust and efficient signature scheme for Vehicle-to-Infrastructure communications, which can effectively eliminate the performance bottleneck when verifying a...
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A Layer-2 Multi-Hop Authentication and Credential Delivery Scheme for Vehicular Networks
October 29, 2008, 12:00am PDT
In this paper, the authors introduce a novel security architecture and security mechanisms for vehicular networks environments. Their approach provides a layer-2 multi-hop authentication and...
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Streaming Media Distribution in VANETs
October 29, 2008, 12:00am PDT
Streaming applications will rapidly develop and contribute a significant amount of traffic in the near future. A problem, scarcely addressed so far, is how to support streaming traffic in...
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Open Source Requirements Engineering
November 8, 2007, 12:00am PST
This paper describes an experience in requirements engineering for an open source E-Learning tool selection. The process meets the challenges of software selection such as the intertwining of...
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Reducing Verification Effort in Component-Based Software Engineering Through Built-In Testing
May 23, 2007, 12:00am PDT
Today component- and service-based technologies play a central role in many aspects of enterprise computing. However, although the technologies used to define, implement, and assemble components...
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Requirements Prioritization Based on Benefit and Cost Prediction: An Agenda for Future Research
February 3, 2009, 12:00am PST
In early phases of the software cycle, requirements prioritization necessarily relies on the specified requirements and on predictions of benefit and cost of individual requirements. This paper...
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Requirements Prioritization Based on Benefit and Cost Prediction: A Method Classification Framework
February 3, 2009, 12:00am PST
In early phases of the software development process, requirements prioritization necessarily relies on the specified requirements and on predictions of benefit and cost of individual requirements....
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Using Dependency Information to Select the Test Focus Within the Integration Testing Process
February 15, 2010, 12:00am PST
Existing software systems consist of thousands of software components realizing countless requirements. To fulfill these requirements, components have to interact with or depend on each other. The...
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Integration Test Order Strategies to Consider Test Focus and Simulation Effort
February 15, 2010, 12:00am PST
The integration testing process aims at uncovering faults within dependencies between the components of a software system. Due to the lack of resources, it is usually not possible to test all...
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