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Institute of Electrical & Electronic Engineers
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Whitepapers
Anomaly-Based Identification of Large-Scale Attacks
October 27, 2009, 12:00am PDT
Large-scale attacks like Distributed Denial-of-Service (DDoS) attacks still pose unpredictable threats to the Internet infrastructure and Internet-based business. Thus, many attack detection...
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Whitepapers
Exploiting the Diversity Gain of Transmitter I/Q Imbalance in Single-Antenna OFDM Systems
October 27, 2009, 12:00am PDT
Zero-IF architecture is a competitive alternative to the conventional super-heterodyne architecture for RF-to baseband conversion in OFDM systems. Despite its advantages of low cost and high...
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Whitepapers
Dynamic Routing of Connections With Known Duration in WDM Networks
October 27, 2009, 12:00am PDT
Recently, new solutions for automatized management in optical networks promise to allow customers to specify on-demand the terms of the Service Level Agreement (SLA) to be guaranteed by the...
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Whitepapers
Diversity Combining for Asymmetrically Clipped Optical OFDM in IM/DD Channels
October 27, 2009, 12:00am PDT
This paper looks at the problem of performance enhancement for Orthogonal Frequency-Division Multiplexing (OFDM) transmission in Intensity Modulated, Direct Detected (IM/DD) optical systems. Due...
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Whitepapers
Experimental Evaluation of PCE-Based Batch Provisioning of Grid Service Interconnections
October 27, 2009, 12:00am PDT
If dynamic bandwidth-guaranteed connections between distributed services (e.g., grid services) are provisioned through a centralized system, the policy to serve connection requests might heavily...
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Whitepapers
An Optical Access Network System Without a Power Supply Using Blind Speech Separation and a Loopback Technique
October 27, 2009, 12:00am PDT
This paper proposes an optical access system that enables voice communication services to continue when a power failure occurs. In particular, the authors propose applying a digital signal...
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Whitepapers
Buffer-based Low-Delay Playout Control Methods for IPTV Terminals
October 27, 2009, 12:00am PDT
IPTV (Internet Protocol TeleVision) terminals have a large receiving buffer for IP networks with large delay jitter. However the large buffer for jitter would cause large delay in playout. In this...
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Whitepapers
OFDM Channel Estimation With Optimal Threshold-Based Selection of CIR Samples
October 27, 2009, 12:00am PDT
In this paper, the authors address the problem of OFDM data-aided channel estimation based on the selection of the Most Significant Samples (MSS) of the Channel Impulse Response (CIR), i.e. those...
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Whitepapers
Performance Analysis and Parameter Optimization of Random Access Backoff Algorithm in LTE
March 1, 2012, 12:00am PST
In this paper, the authors explain about the performance of random access backoff algorithm in Long Term Evolution (LTE) system, taking the physical loss into account. Analytical results are...
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Whitepapers
Performance Evaluation and Analysis on Group Mobility of Mobile Relay for LTE Advanced System
March 20, 2012, 12:00am PDT
High Speed Railway (HSR) scenario was currently agreed as the main scenario in the 3GPP Rel.11 study item, Mobile Relay for E-UTRA. Usually, communications of high-speed railway systems suffer...
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Whitepapers
A New Method for Inter-Cell Interference Estimation in Uplink SC-FDMA Networks
March 30, 2012, 12:00am PDT
This paper addresses a power control and Inter-Cell Interference (ICI) estimation problem in uplink Single Carrier Frequency Division Multiple Access (SC-FDMA) networks. The authors consider a...
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Whitepapers
Subjective Quality of SVC-Coded Videos With Different Error-Patterns Concealed Using Spatial Scalability
July 12, 2011, 12:00am PDT
Degradation of network performance during video transmission may lead to disturbing visual artifacts. Some packets might be lost, corrupted or delayed, making it impossible to properly decode the...
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Whitepapers
Low-Complexity Scheduling Algorithms for Multichannel Downlink Wireless Networks
October 1, 2012, 12:00am PDT
This paper considers the problem of designing scheduling algorithms for multichannel (e.g., OFDM-based) wireless downlink networks, with a large number of users and proportionally large bandwidth....
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Whitepapers
A Customer Service Assurance Platform for Mobile Broadband Networks
October 1, 2011, 12:00am PDT
In this paper, the authors discuss trends, issues, requirements and solutions for Customer Service Assurance (CSA) platforms for mobile broadband networks. They propose a distributed probe-based...
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Whitepapers
A Hands-On Look at Active Probing Using the IP Prespeci Ed Timestamp Option
December 27, 2011, 12:00am PST
In the last years, network measurements have shown a growing interest in active probing techniques. Recent works propose approaches based on the IP pre-specified timestamp option and consider its...
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Whitepapers
Efficient Storage and Processing of High-Volume Network Monitoring Data
January 15, 2013, 12:00am PST
Monitoring modern networks involves storing and transferring huge amounts of data. To cope with this problem, in this paper the authors propose a technique that allows to transform the measurement...
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Whitepapers
Enforcing Service-Level Constraints in Supply Chains With Assembly Operations
January 1, 2013, 12:00am PST
The authors study a feed-forward supply network that involves assembly operations. They compute optimal stock levels which minimize inventory costs and maintain stock-out probabilities below given...
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Whitepapers
Model Based Adaptive Mobility Prediction in Mobile Ad-Hoc Networks
February 25, 2008, 12:00am PST
Mobility Prediction in mobile ad-hoc networks is used in location aided routing and mobility aware topology control protocols. These protocols assume that each node knows its current position,...
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Whitepapers
A Probabilistic Lifetime Analysis for Clustered Wireless Sensor Networks
March 11, 2008, 12:00am PDT
Clustering sensors is considered as an efficient way for increasing the lifetime of a wireless sensor network. One of the main advantages of these networks, leading to a longer lifetime, is the...
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Whitepapers
Energy Efficient and Hop Constraint Intra-Cluster Transmission for Heterogeneous Sensor Networks
March 11, 2008, 12:00am PDT
Although transmission policy is crucial in extending lifetime of sensor networks, most existing policies make simplified assumptions which include: circular cluster with Cluster Head (CH) at the...
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Whitepapers
An Energy-Efficient V-BLAST Based Cooperative MIMO Transmission Scheme for Wireless Sensor Networks
March 11, 2008, 12:00am PDT
Wireless sensor networks have limited energy resource and therefore energy-efficient protocols are required to minimize the energy consumption. The Virtual MIMO technique is considered as one of...
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Whitepapers
Improving BER Performance of T-DMB System by Error/Erasure Correction in RS Codes
March 11, 2008, 12:00am PDT
In this paper, the authors introduce a new scheme to improve the performance of the Terrestrial - Digital Multimedia Broadcasting (T-DMB) system, which exploits the properties of the Reed-Solomon...
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Whitepapers
Autonomic Joint Session Scheduling Strategies for Heterogeneous Wireless Networks
March 11, 2008, 12:00am PDT
In order to optimize usage of radio resource for heterogeneous Radio Access Technologies (RATs) and jointly designed from the user perspective, the JOint Session sCHeduling (JOSCH) mechanism has...
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Whitepapers
TART: Traffic-Aware Routing Tree for Geographic Routing
March 11, 2008, 12:00am PDT
Tree routing is one of the detouring strategies employed in geographic routing to help find a detour for a packet to leave a local minimum. The effectiveness of tree routing depends on the quality...
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Whitepapers
An Optimal Degree Distribution Design and a Conditional Random Integer Generator for the Systematic Luby Transform Coded Wireless Internet
March 11, 2008, 12:00am PDT
When designing Luby Transform (LT) codes, there are three important factors, which determine the attainable performance of the LT code, namely the degree distribution, the integer random generator...
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Whitepapers
RSRP: A Robust Secure Routing Protocol for Mobile Ad Hoc Networks
March 11, 2008, 12:00am PDT
Routing scenario in ad hoc networks is different from infrastructure-based wireless networks; since in ad hoc networks each node acts as a router and is responsible for managing topological...
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Whitepapers
An Optimum Multiple Metrics Gateway Selection Mechanism in MANET and Infrastructured Networks Integration
March 11, 2008, 12:00am PDT
This paper proposes an optimum mechanism to select appropriate gateway based on multiple node metrics: remaining energy, mobility, and number of hops, for interconnected Mobile Ad Hoc NETwork...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Network-Assisted Sink Navigation Protocols for Data Harvesting in Sensor Networks
March 11, 2008, 12:00am PDT
This paper presents a network-assisted sink navigation mechanism in which mobile sink trajectories are computed by a sensor network for energy-efficient data collection. The key idea is that for...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Performance Analysis of Slotted Carrier Sense IEEE 802.15.4 Acknowledged Uplink Transmissions
March 11, 2008, 12:00am PDT
Advances in low-power and low-cost sensor networks have led to solutions mature enough for use in a broad range of applications, requiring various degrees of reliability. To facilitate this, a...
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Whitepapers
Sink Location Service for Geographic Routing in Wireless Sensor Networks
March 11, 2008, 12:00am PDT
Geographic routing has been considered as an efficient, simple, and scalable routing protocol for wireless sensor networks since it exploits pure location information instead of global topology...
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Whitepapers
Energy-Efficient Routing in Wireless Sensor Networks Using Probabilistic Strategies
March 11, 2008, 12:00am PDT
Wireless Sensor Networks (WSNs) are being used in many applications in order to gather sensitive information and forward it to an analysis center. Since a WSN consists of resource-impoverished...
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Whitepapers
Energy Efficient Scheme for Large Scale Wireless Sensor Networks With Multiple Sinks
March 11, 2008, 12:00am PDT
In this paper, the authors consider the multiple sinks placement problem in large-scale Wireless Sensor Networks (WSN). The objective is to determine optimal sinks' positions that maximize the...
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Whitepapers
A Hybrid Routing Protocol for Wireless Sensor Networks Based on a Two-Level Clustering Hierarchy With Enhanced Energy Efficiency
March 11, 2008, 12:00am PDT
A Two-level Hierarchical Clustering based Hybrid routing Protocol (THCHP) for wireless sensor networks is proposed in this paper. The per frame time average energy dissipation performance of THCHP...
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Whitepapers
Genetic Algorithm Aided Design of Near-Capacity Irregular Variable Length Codes
March 11, 2008, 12:00am PDT
In this paper, the authors demonstrate that their ability to match the EXtrinsic Information Transfer (EXIT) function of an Irregular Variable Length Code (IrVLC) to that of a...
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Whitepapers
A Presence-Based Architecture for the Integration of the Sensing Capabilities of Wireless Sensor Networks in the IP Multimedia Subsystem
March 11, 2008, 12:00am PDT
Wireless Sensor Networks (WSN) are made up of small devices that can sense context information (e.g. space, physiology, and environment). The IP Multimedia System (IMS) aims at the convergence of...
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Whitepapers
Realistic Mobility Aware Information Gathering in Disaster Areas
March 11, 2008, 12:00am PDT
In this paper, the authors propose a method for realistic mobility aware information gathering in disaster areas. In the proposed method, a disaster area is divided into a grid, and each node's...
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Whitepapers
Handel-C Implementation of Early-Access Partial-Reconfiguration for Software Defined Radio
March 11, 2008, 12:00am PDT
The new Xilinx Early-Access Partial-Reconfiguration (EAPR) FPGA technology exhibits a clear advantage over the former modular-based partial-reconfiguration flow. This paper compares a Handel-C...
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Whitepapers
The Throughput Analysis of Different IR-HARQ Schemes Based on Fountain Codes
March 11, 2008, 12:00am PDT
In this paper, the authors construct two novel IRHARQ schemes based on fountain codes, which combine the punctured and rateless IR-HARQ schemes, in order to attain the advantageous properties of...
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Whitepapers
3-Dimensional Channel Modeling Using Spherical Statistics for Multiple Input Multiple Output Systems
March 11, 2008, 12:00am PDT
Recently, the Third Generation Partnership standards bodies (3GPP/3GPP2) have defined a channel model for Multiple Input Multiple Output (MIMO) systems. This model is a 2- Dimensional (2D) model...
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Whitepapers
The IEEE 802.11 Power Saving Mechanism: An Experimental Study
March 11, 2008, 12:00am PDT
This paper presents an experimental study of the IEEE 802.11 power saving mechanism on PDA in a Wireless Local Area Network (WLAN). The power consumptions of the PDA in both Continuous Active Mode...
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Whitepapers
A Distributed Resource Control for Fairness in OFDMA Systems : English-Auction Game With Imperfect Information
October 29, 2008, 12:00am PDT
In this paper, the authors study a distributed resource control problem achieving fairness and information theoretic capacity in an OFDMA system. For practicality, they consider an OFDMA system...
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Whitepapers
Queuing Analysis for Multiuser Downlink Channel: Throughput Regions and Exponential Backlog Bounds
October 29, 2008, 12:00am PDT
While multiuser scheduling strategies have been intensively studied recently, the resulting throughput and delay performance affecting strongly end-to-end performance of wireless communication...
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Whitepapers
Routing With Probabilistic Delay Guarantees in Wireless Ad-Hoc Networks
October 29, 2008, 12:00am PDT
In many wireless ad-hoc networks it is important to find a route that delivers a message to the destination within a certain deadline (delay constraint). The authors propose to identify such...
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Whitepapers
Hierarchical Packet Scheduling for Satellite Multimedia Broadcasting: An Adaptive QoS-Aware Design
October 29, 2008, 12:00am PDT
With the unique broadcast nature and ubiquitous coverage of satellite network, the synergy between satellite and terrestrial networks provides new opportunities for delivering wideband services to...
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Whitepapers
Power Allocation in Gaussian Interference Relay Channels Via Game Theory
October 29, 2008, 12:00am PDT
The authors address the power allocation problem for interference relay channels. Due to the competitive nature of the multi-user environment, they model the problem as a strategic non-cooperative...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Optimal Resource Allocation for Two-Way Relay-Assisted OFDMA
October 29, 2008, 12:00am PDT
This paper studies the optimal resource allocation problem for the relay-assisted Orthogonal Frequency-Division Multiple-Access (OFDMA) -based multiuser system. A new transmission protocol, named...
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Whitepapers
Dynamic Subchannel and Power Allocation in OFDMA-Based DF Cooperative Relay Networks
October 29, 2008, 12:00am PDT
This paper focuses on subchannel and power allocation problem in OFDMA-based Decode-and-Forward (DF) cooperative relay networks. The objective of this problem is to maximize the total data rate...
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Whitepapers
On Power Allocation for Dual-Hop Amplify-and-Forward OFDM Relay Systems
October 29, 2008, 12:00am PDT
Multihop relay systems with Orthogonal Frequency Division Multiplexing (OFDM) schemes have attracted much attention in wireless communications research area,. Maximizing the performances of OFDM...
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Whitepapers
A Fair Subcarrier Allocation Algorithm for Cooperative Multiuser OFDM Systems With Grouped Users
October 29, 2008, 12:00am PDT
Dynamic resource allocation improves the performance of multiuser OFDM systems by exploiting multiuser diversity. Cooperative diversity is a technique where multiple users share their resources to...
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Whitepapers
On Optimal Power Allocation for Source-Orthogonal Relay-Non-orthogonal Amplify-and-Forward Relaying
October 29, 2008, 12:00am PDT
An Amplify-and-Forward relaying network where the Source is Orthogonal to all the Relays but the relays are Non-orthogonal (SORNAF) is studied. The problem of relay power optimization in a SORNAF...
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Whitepapers
Enhanced Soft Interference Cancellation Algorithm for V-BLAST Systems
October 29, 2008, 12:00am PDT
In this paper, the authors investigate soft interference cancellation algorithms for Vertical Bell laboratories LAyered Space-Time (V-BLAST) systems. By using Gaussian-forcing technique and fast...
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Whitepapers
A Maximum-Likelihood Decoder With a New Reduction Strategy for MIMO Channel Systems
October 29, 2008, 12:00am PDT
An efficient maximum-likelihood decoder with a new reduction strategy is proposed for linear MIMO channel systems. Unlike the current reduction strategies which only reorder the columns of the...
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Whitepapers
MMSE Based Preprocessing and Its Variations for Closest Point Search
October 29, 2008, 12:00am PDT
The Sphere Decoding (SD) is a category of algorithms finding the closest lattice point and known to have the expected complexity approximately cubic in the dimension of the lattice point to be...
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Whitepapers
K-Best Sphere Detection for the Sphere Packing Modulation Aided SDMA/OFDM Uplink
October 29, 2008, 12:00am PDT
Recently, the turbo-detected Sphere Packing (SP) aided Space-Time Block-Coding (STBC) STBC-SP scheme was demonstrated to provide useful performance improvements over conventionally-modulated...
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Whitepapers
An Efficient Tree Search for Reduced Complexity Sphere Decoding
October 29, 2008, 12:00am PDT
The complexity of Sphere Decoding (SD) has been widely studied due to the importance of this algorithm in obtaining the optimal Maximum Likelihood (ML) performance with lower complexity. In this...
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Whitepapers
Step Size Optimization for Fixed Step Closed Loop Power Control on WCDMA High Altitude Platforms (HAPs) Channel
October 29, 2008, 12:00am PDT
This paper evaluates fixed step algorithm of closed loop power control and investigates an optimum step size for WCDMA communication employing High Altitude Platforms (HAPs). In CDMA, power...
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Whitepapers
Performance of Iterative Multiuser Detection With Channel Estimation for MC-IDMA and Comparison With Chip-Interleaved MC-CDMA
October 29, 2008, 12:00am PDT
This paper applies iterative multiuser detection employing new channel estimation to MultiCarrier InterLeave Division Multiple Access (MC-IDMA), known as OFDM-IDMA, which is expected to improve...
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Whitepapers
Data-Driven Code-Hopping for MC-CDMA Precoding Schemes
October 29, 2008, 12:00am PDT
A novel code optimization scheme is presented for the downlink of MultiCarrier Code Division Multiple Access (MCCDMA) systems employing Phase Shift Keying (PSK) modulation. The optimization is...
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Whitepapers
Joint Codeword and Power Adaptation for CDMA Systems With Multipath and QoS Requirements
October 29, 2008, 12:00am PDT
In this paper, the authors present an algorithm for joint codeword and power adaptation applicable in the uplink of a Code Division Multiple Access (CDMA) system in which multipath channels...
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Efficient Feasibility Examination for Successive Interference Cancellation in DS-CDMA Systems
October 29, 2008, 12:00am PDT
On the uplink of a DS-CDMA system, Successive Interference Cancellation (SIC) technique can be employed to reduce multiple access interference and improve system capacity. In such a system with K...
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Whitepapers
A Rank Prediction Method for the Multistage Wiener Filter Used for Interference Mitigation in CDMA Systems
October 29, 2008, 12:00am PDT
The Multistage Wiener filter (MWF) is an efficient technique for interference mitigation in CDMA systems. A limitation to its implementation, however, is that poor rank selection causes...
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Whitepapers
Error Performance of Linear Dispersion Codes
October 9, 2008, 12:00am PDT
In this paper, the authors present a study of error performance of linear dispersion codes. First, an upper bound of average error probability is derived for any signal-to-noise ratio. Based on...
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Near-Capacity Iteratively Decoded Binary Self-Concatenated Code Design Using EXIT Charts
October 29, 2008, 12:00am PDT
In this paper, Extrinsic Information Transfer (EXIT) charts are used to design binary SElf-Concatenated Convolutional Codes employing Iterative Decoding (SECCC-ID) for communicating over both...
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Virtual Channel Based LLR Calculation for LDPC Coded SC-FDE System in 60-GHz WPAN
October 29, 2008, 12:00am PDT
To deal with the multi-path delay spread in Non-Line-Of-Sight (NLOS) environments, Single-Carrier Frequency-Domain Equalization (SC-FDE), a.k.a., Single-Carrier Block Transmission (SCBT), is...
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Whitepapers
Performance of Regular Low Density Parity Check Codes Over Hybrid Optical/RF Channels
October 29, 2008, 12:00am PDT
A hybrid channel, consisting of a Free Space Optical (FSO) link and a parallel Radio Frequency (RF) link, is considered. Information bits are first encoded by a Low Density Parity Check (LDPC)...
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Enhanced Verification-Based Decoding for Packet-Based LDPC Codes Over Wireless Channels
October 29, 2008, 12:00am PDT
In this paper, the authors apply the Enhanced Verification-based decoding Algorithm (EVA) for packet-based LDPC codes over wireless channels. Compared with the Verification Algorithm (VA) in the...
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An Improvement on LDPC Coded Queued Codes
October 29, 2008, 12:00am PDT
The queued-code based on Low-Density Parity-Check (LDPC) codes, which exploit both the near Shannon-limit performance LDPC codes and the instantaneous Channel State Information (CSI), can provide...
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Whitepapers
Multiple Antenna Assisted Hard Versus Soft Decoding-And-Forwarding for Network Coding Aided Relaying Systems
October 29, 2008, 12:00am PDT
In this paper, the authors propose two types of new decoding algorithms for a Network Coding aided Relaying (NCR) system, which adopts multiple antennas at both the transmitter and receiver. They...
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Whitepapers
Cooperative Multiplexing in Full-Duplex Multi-Antenna Relay Networks
October 29, 2008, 12:00am PDT
Consider a network with one source, one destination and multiple relays. It is shown that multiplexing gains that are higher than that of the direct link are possible for any finite SNR, in such a...
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Whitepapers
Multi-Hop Relaying and MIMO Techniques in Cellular Systems - Throughput Achievable on Rayleigh/Ricean Channels
October 29, 2008, 12:00am PDT
Two very important and active areas of wireless research are multi-hop relaying and multiple antenna techniques. Wireless multi-hop relaying, adopted in emerging standards such as 802.16j, can...
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Whitepapers
One- and Two-Way Decode-and-Forward Relaying for Wireless Multiuser MIMO Networks
October 29, 2008, 12:00am PDT
In this paper, the authors propose multiuser Multiple-Input Multiple-Output (MIMO) one- and two-way relaying protocols. Several wireless MIMO node pairs are establishing either unidirectional or...
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Opportunistic Relaying for Dual-Hop Wireless MIMO Channels
October 29, 2008, 12:00am PDT
In wireless relay networks, the use of multiple antennas at both the source and destination can increase the capacity linearly with the number of antennas. In this paper, the authors investigate...
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Generalized Schur Decomposition-Based Two-Way Relaying for Wireless MIMO Systems
October 29, 2008, 12:00am PDT
Deploying relay stations improves the Signal-to-Interference and Noise Ratio (SINR) by making a Pico cell environment. Nonetheless, a critical problem associated with deploying RS is additional...
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Angular-Domain Channel Model and Channel Estimation for MIMO System
October 29, 2008, 12:00am PDT
A new MIMO channel model based on angular-domain, double-directional channel model is proposed. Angular domain is a more appropriate coordinate to describe the MIMO channel, since the incoming...
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Maximum Likelihood Method for MIMO Mobile-To-Mobile Channel Parameter Estimation
October 29, 2008, 12:00am PDT
A three-dimensional reference model for wideband multiple-input multiple-output mobile-to-mobile channels is reviewed. To allow comparison between the proposed model and measured data, a new...
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An Experimental Investigation of Wideband MIMO Channel Based on Indoor Hotspot NLOS Measurements at 2.35GHz
October 29, 2008, 12:00am PDT
In this paper, measurement data from wideband Multiple-Input Multiple-Output (MIMO) channel measurements at 2.35GHz are presented. Measurements were preformed in indoor hotspot scenario with No...
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Computing the Receive Spatial Correlation for a Multi-Cluster MIMO Channel Using Different Array Configurations
October 29, 2008, 12:00am PDT
Spatial correlation among received signals has a significant impact on the performance of a Multiple-Input Multiple-Output (MIMO) system. In prior research, expressions were derived for the...
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Two-Dimensional Autoregressive Model for MIMO Wideband Mobile Radio Channels
October 29, 2008, 12:00am PDT
In this paper, the authors propose the multichannel Two-Dimensional (2D) Auto-Regressive (AR) model for Multiple-Input Multiple-Output (MIMO) wideband mobile wireless channels. The parameters of...
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Whitepapers
Optimal Error Rate Performance of Binary TH-UWB Receivers in Multiuser Interference
October 29, 2008, 12:00am PDT
An exact mathematical model which explains the important characteristics of the Probability Density Function (PDF) of the Multiple Access Interference (MAI) in Time-Hopping UWB (TH-UWB) systems is...
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A Novel Chip-Level Algorithm for UWB Timing
October 29, 2008, 12:00am PDT
In this paper, a novel scheme is developed for chip-level timing in UWB communications. To accomplish the proposed algorithm, the Time Hopping (TH) code is transformed to the Spread Time Hopping...
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