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Institute of Electrical & Electronic Engineers
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Whitepapers
The Dedicated Optical Connection Protection With IP Traffic in WDM Mesh Networks
March 1, 2012, 12:00am PST
The optical networks based on WDM (Wavelength Division Multiplex) technology can carry enormous amount of data in each fiber link in the network. The networks with the high capacity links have the...
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Whitepapers
Hybrid Power Systems for Cell Sites in Mobile Cellular Networks
January 1, 2012, 12:00am PST
The power consumption of wireless access networks has become a major economic and environmental issue. Providing dedicated low cost power supply to off-grid cell sites located in the rural and...
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Whitepapers
Creating Robust Activity Maps Using Wireless Sensor Network in a Smart Home
September 25, 2007, 12:00am PDT
This paper presents a practical application called "Activity map" to serve as guidance to show ambient intelligence-related contextual information gathered from both humans and their surrounding...
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OLIC: OnLine Information Compression for Scalable Hosting Infrastructure Monitoring
June 11, 2011, 12:00am PDT
Quality-Of-Service (QoS) management often requires a continuous monitoring service to provide updated information about different hosts and network links in the managed system. However, it is a...
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Whitepapers
On Channel Estimation for Amplify-and-Forward Two-Way Relay Networks
October 29, 2008, 12:00am PDT
In this paper, the authors study the channel estimation problem for the Two-way Wireless Relay Network (TWRN) where two terminals exchange their information through a relay node in a...
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Whitepapers
Optimal Training Sequence Design for Bi-Directional Relay Networks
October 29, 2008, 12:00am PDT
In this paper, the problem of training sequence design in a bi-directional relay network is investigated. The two nodes Tx1 and Tx2 communicate with each other via a ReLay (RL). The RL receives...
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Whitepapers
Precoding Assisted Blind CFO Estimation in Cooperative SFBC-OFDM Channels With Transmitter/Receiver IQ Imbalances
October 29, 2008, 12:00am PDT
In a distributed cooperative environment, synchronization is a major issue. Especially when OFDM is employed in the physical layer, frequency offset synchronization is of great significance. In...
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Whitepapers
On Channel Estimation and Capacity for Amplify and Forward Relay Networks
October 29, 2008, 12:00am PDT
Relay networks have received considerable attention recently, especially when limited size and power resources impose constraints on the number of antennas within a wireless sensor network. In...
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Whitepapers
Sum Capacity of Opportunistic Scheduling for Multiuser MIMO Systems With Linear Receivers
October 29, 2008, 12:00am PDT
The authors analyze the sum capacity achieved by linear receivers in a multiple-input multiple-output broadcast channel. They consider a simple and practical opportunistic scheduling algorithm,...
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Whitepapers
On the Ergodic Capacity of Frequency Selective MIMO Systems Equipped With MMSE Receivers: An Asymptotic Approach
October 29, 2008, 12:00am PDT
It is now well established that using multiple transmit and receive antennas potentially allows to increase the Shannon capacity of digital communications systems. Since the seminal work of...
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Whitepapers
Optimal Front-End Design for MIMO Receivers
October 29, 2008, 12:00am PDT
The effect of antenna mutual coupling on fading correlation in compact MIMO arrays has received considerable attention. By contrast, relatively little attention has been paid to the noise. In this...
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Whitepapers
A Decomposition Approach to MIMO Interference Relay Networks
October 29, 2008, 12:00am PDT
In this paper, the authors consider a class of wireless ad hoc networks, namely two-hop MIMO interference relay network, where L M-antenna source-destination pairs communicate via K relay nodes...
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Whitepapers
Outage Capacity Analysis of Downlink OFDMA Resource Allocation With Multiple Transmit Antennae and Limited Feedback
October 29, 2008, 12:00am PDT
Opportunistic user allocation and multiple antenna transmission provide significant performance enhancement in future wireless communication systems. In this paper, theoretical outage capacity...
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Whitepapers
AOA Cooperative Position Localization
October 29, 2008, 12:00am PDT
In wireless sensor networks, it is very important to obtain an accurate position of each sensor node. In this paper, the authors consider the potential of Ultra WideBand (UWB) signals for...
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Whitepapers
On Cellular Capacity With Base Station Cooperation
October 29, 2008, 12:00am PDT
This paper is concerned with cellular systems with rate constraints in fading environments. The authors consider a simple but asymptotically optimal Matched Filtering/Successive Interference...
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Whitepapers
Joint Network Coding and Superposition Coding for Multi-User Information Exchange in Wireless Relaying Networks
October 29, 2008, 12:00am PDT
Joint Network Coding and Superposition Coding (JNSC) scheme is proposed for information exchange between more than two users in a wireless relaying network. In this paper, the authors consider two...
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Whitepapers
Denoising Maps and Constellations for Wireless Network Coding in Two-Way Relaying Systems
October 29, 2008, 12:00am PDT
The authors investigate on the design of modulation schemes suited for two - way wireless relaying systems that apply network coding at the physical layer. They consider network coding based on...
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Whitepapers
An Efficient Hybrid ARQ System Using Multilevel Coded Modulation With Reduced Constellation Size
October 29, 2008, 12:00am PDT
In order to guarantee highly reliable communications over noisy channels, the use of retransmission techniques is necessary, and the Hybrid Auto Repeat reQuest (HARQ) technique has been widely...
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Whitepapers
Adaptive Hybrid ARQ in Gaussian and Turbo Coded Systems
October 29, 2008, 12:00am PDT
The authors consider the design of adaptive hybrid Automatic Retransmission reQuest (ARQ) with Incremental Redundancy (IR) in which the transmission rates of different blocks in one hybrid ARQ...
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Whitepapers
Achieving High Frequency Diversity With Subcarrier Allocation in OFDMA Systems
October 29, 2008, 12:00am PDT
OFDM can provide frequency diversity gain for point-to-point communications over frequency-selective slow fading channel. Recent works show that OFDM may also form a flexible and efficient...
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Whitepapers
Diversity Technique Employing Digitized Radio Over Fiber Technology for Wide-Area Ubiquitous Network
October 29, 2008, 12:00am PDT
Wide area ubiquitous networks should have the capability to handle more than 10,000 wireless terminals in a large wireless cell with the radius of several kilometers. However, the functions of...
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Whitepapers
Diversity and Coding Gains of Threshold-Based Generalized Selection Combining
October 29, 2008, 12:00am PDT
In this paper, the authors study the asymptotic performance of Absolute-Threshold and Normalized-Threshold-based Generalized Selection Combining (AT-GSC and NT-GSC) schemes over generalized fading...
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Whitepapers
Diversity Order Analysis of Bit-Interleaved Coded DPSK With Cyclic Delay Diversity
October 29, 2008, 12:00am PDT
Cyclic Delay Diversity (CDD) exploits the principle of the Orthogonal Frequency Division Multiplexing (OFDM) that transforms the delay spread into the frequency selectivity. In order to...
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Whitepapers
Spatial PAPR Reduction Based Beamforming Scheme for EIRP Constrained Systems
October 29, 2008, 12:00am PDT
Certain communications transmitters are restricted by their Equivalent Isotropic Radiated Power (EIRP) rather than the total transmitted power. Important examples are ultra - wideband systems. Use...
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Whitepapers
Correlated Fading in Broadcast MIMO Channels: Curse or Blessing?
October 29, 2008, 12:00am PDT
The impact of transmit correlation on the performance of limited feedback Multi-User MIMO is investigated. Correlated fading is shown to highly influence the probability of scheduling orthogonal...
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Whitepapers
Channel Quantization and Feedback Optimization in Multiuser MIMO-OFDM Downlink Systems
October 29, 2008, 12:00am PDT
The authors consider a multiuser MIMO-OFDM downlink system with single antenna Mobile Terminals (MTs) where channel state information at the base station is provided through limited uplink...
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Whitepapers
Multi-User Multi-Input Multi-Output (MU-MIMO) Downlink Beamforming Systems With Limited Feedback
October 29, 2008, 12:00am PDT
This paper considers Zero-Forcing BeamForming (ZFBF) MUMIMO systems in which one stream is transmitted per user. Assuming no knowledge of other users' channel matrices, User Terminals (UT) feed...
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Whitepapers
Performance of Multi-User MIMO Precoding With Limited Feedback Over Measured Channels
October 29, 2008, 12:00am PDT
In Multi-User Multiple-Input Multiple-Output (MUMIMO) systems, Channel State Information at the Transmitter (CSIT) allows for multi-user spatial multiplexing and thus increases the system...
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Whitepapers
User Selection for Multiple-Antenna Broadcast Channel With Zero-Forcing Beamforming
October 29, 2008, 12:00am PDT
This paper investigates the Zero-Forcing (ZF) beamforming transmit strategy in the multiple-antenna multiuser downlink systems. The authors consider the case of mobile users equipped with multiple...
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Whitepapers
Low Complexity Scheduling for Downlink Multiuser MIMO Systems in Correlated Channels
October 29, 2008, 12:00am PDT
Many successive scheduling schemes associated with linear transmit beamforming have been proposed which can asymptotically achieve the sum rate of Dirty Paper Coding (DPC) in i.i.d. channels. In...
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Whitepapers
A Distributed Space-Frequency Coding for Cooperative Communication Systems With Multiple Carrier Frequency Offsets
October 29, 2008, 12:00am PDT
In cooperative communications, due to the distributed nature, multiple different Carrier Frequency Offsets (CFOs) may be present and make the channel time-varying. It is hard for the receiver to...
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Whitepapers
Distributed Double-Differential Orthogonal Space-Time Coding for Cooperative Networks
October 29, 2008, 12:00am PDT
In this paper, distributed double-differential coding is proposed to avoid the problem of carrier offsets in amplify and forward protocol based cooperative network with two relays. A...
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Whitepapers
Perturbation-Based Distributed Beamforming for Wireless Relay Networks
October 29, 2008, 12:00am PDT
This paper deals with distributed beamforming techniques for wireless networks with half-duplex amplify-and-forward relays. Existing schemes optimize the beamforming weights based on the...
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Whitepapers
A Novel Distributed Space-Time Trellis Code for Asynchronous Cooperative Communications Under Frequency-Selective Channels
October 29, 2008, 12:00am PDT
In most cooperative communications works, perfect synchronization among relay nodes is assumed in order to achieve cooperative diversity. However, this assumption is not realistic due to the...
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Whitepapers
Differential Distributed Space-Frequency Coding for Broadband Non-Regenerative Wireless Relaying Systems
October 29, 2008, 12:00am PDT
Cooperative diversity technique allows a virtual antenna array to achieve diversity, enhance coverage, and potentially increase capacity in a distributed fashion. Previous work in this area has...
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Whitepapers
Capture Effects in Opportunistic Slotted ALOHA Over Rayleigh Fading Channels
October 29, 2008, 12:00am PDT
This paper studies the throughput, average packet delay and average power consumption for Opportunistic Slotted ALOHA (OS-ALOHA) in Rayleigh fading channels. The basic idea of the opportunistic...
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Whitepapers
Convergence of Power Control in a Random Channel Environment
October 29, 2008, 12:00am PDT
In this paper, the authors study the Foschini Miljanic algorithm, which was originally proposed in a static channel environment. They investigate the algorithm in a random channel environment,...
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Whitepapers
Analytical Framework for Performance Evaluation of Hybrid ARQ Schemes
October 29, 2008, 12:00am PDT
In this paper, the performance of Automatic Retransmission reQuest (ARQ) schemes at the forward link of a wireless system with long round trip delay, e.g., a Land Mobile Satellite (LMS) system, is...
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Whitepapers
Delay-Energy Tradeoffs in Wireless Ad-Hoc Networks With Partial Channel State Information
October 29, 2008, 12:00am PDT
Given a wireless network where each link undergoes small-scale (Rayleigh) fading, the authors consider the problem of routing a message from a source node to a target node while minimizing energy...
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Whitepapers
Opportunity Detection for OFDMA Systems With Timing Misalignment
October 29, 2008, 12:00am PDT
Accurate detection of spectrum opportunities within the frequency band of an Orthogonal Frequency Division Multiple Access (OFDMA) system is a critical requirement for the realization of a...
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Whitepapers
An Adaptive Energy Saving Mechanism in the Wireless Packet Access Network
March 11, 2008, 12:00am PDT
The next generation wireless communication systems will be based on the "All-IP" structure and the Wireless Packet Access Network (WPAN) will have a dominant future. Mobility is one of main...
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Whitepapers
On the Deployment of Mobile Trusted Modules
March 11, 2008, 12:00am PDT
In its recently published TCG Mobile Reference Architecture, the TCG Mobile Phone Work Group specifies a new concept to enable trust into future mobile devices. For this purpose, the TCG devises a...
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Whitepapers
Hardware Impairments on LDPC Coded SC-FDE and OFDM in Multi-Gbps WPAN (IEEE 802.15.3c)
March 11, 2008, 12:00am PDT
The Multi-Gbps Wireless Personal Area Network (WPAN) using 60-GHz is being standardized in the task group of IEEE 802.15.3c. In the PHYsical (PHY) layer design, there are two competitive...
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Whitepapers
Frequency Selective OFDMA Scheduler With Limited Feedback
March 11, 2008, 12:00am PDT
Orthogonal Frequency Division Multiple Access (OFDMA) is the preferred multiple access scheme for future broadband cellular systems as it provides high spectral efficiency. The choice of OFDMA...
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Whitepapers
Orthogonalizing Transmission in MIMO With Linear Receiver and Finite MCS Set
March 11, 2008, 12:00am PDT
Multiantenna transmissions based on linear precoding have been investigated intensely both for single stream diversity transmissions and for multi-stream spatial multiplexing transmissions. When...
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Whitepapers
Service Discovery in Wireless Mesh Networks
March 11, 2008, 12:00am PDT
This paper proposes an approach for service discovery in Wireless Mesh Networks called OLSR-mDNS which supports both routing and non-routing clients. Therefore, the multicast DNS (mDNS) protocol...
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Whitepapers
On the Uplink Capacity of an 802.16j System
March 11, 2008, 12:00am PDT
A multihop relay extension for IEEE 802.16e systems is the subject of ongoing standardization activities within the IEEE 802.16j Task Group. The emerging IEEE 802.16j standard enhances the 802.16e...
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Whitepapers
Ubiquitous Terminal Assisted Positioning Prototype
March 11, 2008, 12:00am PDT
Statistical terminal assisted mobile positioning is a methodology that enhances the performance of existing localization techniques, by exploiting historical measurements collected at the terminal...
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Whitepapers
Selective Relaying in Cooperative OFDM Systems: Two-Hop Random Network
March 11, 2008, 12:00am PDT
In this paper, the authors investigate two selective relaying schemes in cooperative OFDM systems. Selective OFDMA relaying, where the relay selection is performed in a per-subcarrier manner, and...
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Whitepapers
Energy-Distortion-Authentication Optimized Resource Allocation for Secure Wireless Image Streaming
March 11, 2008, 12:00am PDT
Joint consideration of energy efficiency, multimedia quality and media authenticity has largely been overlooked in the studies of secure wireless multimedia streaming. In this paper, the authors...
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Whitepapers
Energy-Aware Co-Operative (ECO) Relay-Based Packet Transmission in Wireless Networks
March 11, 2008, 12:00am PDT
In infrastructure wireless networks, nodes at the edge of the coverage area need to spend more energy to transmit their packets than those close to the Access Point (AP). Less energy is required...
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Whitepapers
On the Diversity-Multiplexing Tradeoff of Concurrent Decode-and-Forward Relaying
March 11, 2008, 12:00am PDT
In this paper, the Diversity-Multiplexing Tradeoff (DMT) behavior of a novel concurrent Decode-and-Forward (DF) relaying cooperative diversity transmission protocol is analyzed. A two-source...
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Whitepapers
Optimal Relay Location in Multi-Hop Cellular Systems
March 11, 2008, 12:00am PDT
Relay Stations (RSs) are usually used to enhance the signal strength for the users close to the cell boundary. However, transmission through a relay station needs two transmission phases, i.e.,...
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Whitepapers
Statistical Analysis of the IEEE 802.15.4a UWB PHY Over Multipath Channels
March 11, 2008, 12:00am PDT
This paper shows the application of a recently proposed statistical characterization of the Ultra-WideBand (UWB) radio channel to the standardized IEEE 802.15.4a UWB PHYsical layer (PHY). The...
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Whitepapers
DSML: Dual Signal Metrics for Localization in Wireless Sensor Networks
March 11, 2008, 12:00am PDT
In wireless sensor networks and wireless ad-hoc networks, localization systems have used diverse signal metrics such as Received Signal Strength Indicator (RSSI) and Time Difference of Arrival...
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Whitepapers
PAMP: Power-Aware Multi-Path Routing Protocol for a Wireless Ad Hoc Network
March 11, 2008, 12:00am PDT
In a wireless ad hoc network, the limited energy of the nodes is one of major challenges. Many research works are proposed to solve this issue from various aspects. The authors' work focuses on...
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An Opportunistic Scheduling Scheme With Minimum Data-Rate Guarantees for OFDMA
March 11, 2008, 12:00am PDT
The authors tackle the problem of providing minimum data-rate guarantees for different classes-of-service in an OFDMA-based network, while obtaining a high system throughput. Their approach is...
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Whitepapers
Frequency-Domain Link Adaptation for Wideband OFDMA Systems
March 11, 2008, 12:00am PDT
A novel frequency-domain Mutual-Information-based Adaptive Coding and Modulation (MI-ACM) link adaptation technique has been developed in the European research project WINNER. On the link level,...
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Whitepapers
Security Considerations for Handover Schemes in Mobile WiMAX Networks
March 11, 2008, 12:00am PDT
IEEE 802.16e uses EAP-based authentication and key management for link layer security. Due to the lack of ability to support mobility, however, EAP-based key management becomes a principal...
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Dynamic Packet Selection for H.264 Video Streaming Over IEEE 802.11e WLANs
March 11, 2008, 12:00am PDT
Because wireless channel condition is time-varying, the allocated bandwidth is usually not fixed. Therefore, it is a challenge to guarantee QoS, especially for bandwidth-consuming and...
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WiMAX Fast-Moving Access Network
March 11, 2008, 12:00am PDT
Facing the challenge of providing broadband access to high speed vehicle on motorway scenario, this paper1discloses a fibre network employing star-tree architecture with a central control system...
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Using Incompletely Cooperative Game Theory in Wireless Sensor Networks
March 11, 2008, 12:00am PDT
In WSNs, energy conservation is the primary goal, while throughput and delay are less important. So used energy is traded for throughput and delay. In this paper, a novel concept of incompletely...
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Downlink Control Channel Design for 3GPP LTE
March 11, 2008, 12:00am PDT
With the emergence of packet-based wireless broadband systems, work has begun on Long Term Evolution (LTE) of the UMTS Terrestrial Radio Access and Radio Access Network aimed for commercial...
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Computationally-Efficient, Low-Order Filtering Technique for TETRA Release 2 Synchronization
March 11, 2008, 12:00am PDT
The new TETRA Release 2 standard aims to increase the data throughput of the current TETRA 1 standard by a factor of 10. However there are serious issues with the cross-correlation based timing...
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Whitepapers
A Cluster-Based Middleware for Infrastructure Wireless Mesh Networks
March 11, 2008, 12:00am PDT
Recently, Wireless Mesh Networks (WMNs) have appeared as a promising technology, with many potential applications, for next-generation access networks and they are hence actively researched and...
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Channel Estimation Assisted by Postfixed Pseudo-Noise Sequences Padded With Null Samples for Mobile OFDM Communications
March 11, 2008, 12:00am PDT
A Channel Estimation (CE) technique that uses a post-fixed pseudo-random sequence padded with zeros is investigated in this paper to extend Pseudo-Random-Postfix...
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Testbed Implementation of a Secure Flooding Time Synchronization Protocol
March 11, 2008, 12:00am PDT
A fundamental building block in distributed wireless sensor networks is time synchronization. Given resource constrained nature of sensor networks, previous research has focused on developing...
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Minimizing Control Management Overhead for Scalable Mobile Ad-Hoc Networks
March 11, 2008, 12:00am PDT
In this paper, the authors provide a parametric model for analyzing the control overhead usage in Mobile Ad-hoc NETworks (MANET). In particular, they focus on evaluating the impact of the...
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Cooperative Multi-Hop Wireless Sensor-Actuator Networks: Exploiting Actuator Cooperation and Cross-Layer Optimizations
March 11, 2008, 12:00am PDT
Delay and energy constraints have a significant impact on the design and operation of wireless Sensor-Actuator NETworks (SANETs). Furthermore, preventing sensor nodes from being inactive is very...
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Synchronization Service Integrated Into Routing Layer in Wireless Sensor Networks
March 11, 2008, 12:00am PDT
The time synchronization problem needs to be considered in a distributed system. In Wireless Sensor Networks (WSNs) this issue must be solved with limited computational, communication and energy...
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A Joint Utility-Lifetime Optimization Algorithm for Cooperative MIMO Sensor Networks
March 11, 2008, 12:00am PDT
Cooperative MIMO transmission technique is considered as one of the effective solutions to reduce the energy consumption in wireless sensor networks. However, the existing cooperative MIMO based...
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On the Availability of Wireless Sensor Networks
March 11, 2008, 12:00am PDT
The success of wireless sensor networks relies on effective power-saving schemes. In this paper, the authors investigate a particular operating scheme: the sensor's communication function is...
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Analysis of Low Latency MAC Protocols for Clustered Sensor Networks
March 11, 2008, 12:00am PDT
In this paper, a low latency MAC protocol that can be used in sensor networks is proposed. To extend the lifetime of sensor nodes, it was used to synchronize active/sleep periods of all sensor...
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Energy-Efficient Geographical Forwarding Algorithm for Wireless Ad Hoc and Sensor Networks
March 11, 2008, 12:00am PDT
Energy-efficient use is a critical issue in the design of wireless multi-hop networks such as wireless ad hoc and sensor networks. Location-based routing protocols are known to have high...
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A Unified Framework for Movement-Assisted Sensor Deployment
March 11, 2008, 12:00am PDT
Coverage is a fundamental problem in sensor networks. Sensor coverage, which reflects how well a sensor network is monitored by sensors, is an important measure for the Quality of Service (QoS)...
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XLRP: Cross Layer Routing Protocol for Wireless Sensor Networks
March 11, 2008, 12:00am PDT
The developments in the field of Wireless Sensor Networks (WSNs) have been accompanied by a paradigm shift from the layered protocol design to a cross layer design, which has shown its promise in...
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Whitepapers
Analysis for Localization-Oriented Coverage in Camera Sensor Networks
March 11, 2008, 12:00am PDT
Camera sensor networks have recently emerged as a very critical research topic. Target tracking and localization are important applications in camera sensor networks. In this paper, the authors...
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Collaborative Target Localization in Camera Sensor Networks
March 11, 2008, 12:00am PDT
Target localization is an important application in sensor networks. Although the localization problem in acoustic/radar sensor networks has been intensively studied, few consider the problem in...
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Correlation-Based Security in Time Synchronization of Sensor Networks
March 11, 2008, 12:00am PDT
It is very important to monitor the water quality of lakes since any abnormal chemical components/pollutants can possibly cause health problems. Chemical Water Sensors can be used for such...
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A Distributed Protocol for Ensuring Both Probabilistic Coverage and Connectivity of High Density Wireless Sensor Networks
March 11, 2008, 12:00am PDT
Recently, Wireless Sensor Networks (WSNs) have been widely used in the fields of military affairs, intelligent family, environment surveillance and commercial management and so on. In practice,...
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