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Institute of Electrical & Electronic Engineers
(11333 results)-
Whitepapers
Advantages of Optimal Longcut Route for Wireless Mobile Users
April 26, 2011, 12:00am PDT
In the future mobile network era and even now, the authors are faced with more diverse user and social needs for the network. These needs are changing the priorities of necessities on network and...
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Whitepapers
A Dynamic Pricing Method for Efficient Radio Resource Management in Wireless Access Networks
April 26, 2011, 12:00am PDT
Radio Resource Management(RRM) has become critical with the current growth in the development of new technologies and services in the field of cellular communications. Efficient management of...
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Whitepapers
Economically Viable Support for Internet Mobility
April 26, 2011, 12:00am PDT
The support for mobility is a major requirement for the future Internet. Although several mobility solutions have been proposed, none of them has been largely deployed, mostly because they are not...
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Whitepapers
An Architecture for Optimized Inter- Technology Handovers: Experimental Study
April 26, 2011, 12:00am PDT
With the large number of access technologies and the emergence of user mobility, the need to "Access the world", anywhere and anytime has gained a significant importance. It is essential to ensure...
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Whitepapers
Diversity Combining in Hybrid RF/FSO Systems With PSK Modulation
April 26, 2011, 12:00am PDT
The authors present a novel architecture for hybrid Radio Frequency (RF)/ Free Space Optical (FSO) wireless systems without feedback or Channel State Information (CSI) at the transmitter. Under...
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Whitepapers
Transmission Analysis of CDMA-Based Wireless Services Over Turbulent Radio-on-FSO Links Using Aperture Averaging
April 26, 2011, 12:00am PDT
In this paper, the authors study the performance of a Radio over Free-Space Optical (RoFSO) system for transmitting Code Division Multiple Access (CDMA) signals using Aperture Averaging (AA)...
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Whitepapers
Performance Analysis of Optical Orthogonal Codes With Variable Chip Rates
April 26, 2011, 12:00am PDT
This paper considers Optical Orthogonal Codes (OOCs) with variable chip rates. In the previous studies on OOCs have been performed on uniform/non-uniform code length/weight distributions. They...
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Whitepapers
Reduced-Dispersion Duplex DQPSK Radio-Over-Fiber Communications Using Single-Laser-Based Multiple Side-Bands
April 26, 2011, 12:00am PDT
Multiple side-bands are generated from a single laser diode with the aid of optical carrier suppression, which facilitates the transmission of reduced-rate parallel streams mapped to the...
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Whitepapers
On the Performance of Network Coding With Protection Cycles
April 26, 2011, 12:00am PDT
A meshed network with N transport paths can be effectively protected against single link failures using network coding and protection cycles (p-cycles). This so called 1+N protection scheme...
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Whitepapers
Cooperative Mobile High-Speed and Personal Area Networks for the Provision of Pervasive E-Health Services
April 26, 2011, 12:00am PDT
This paper studies the performance of a joint network comprised of a high-speed Third-Generation (3.5G) networking technology, HSPA (High Speed Packet Access), wireless sensors, and satellite...
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Whitepapers
Robust Transmission Scheduling and Power Control for Dynamic Wireless Access in a Hospital Environment
April 26, 2011, 12:00am PDT
The authors propose a robust optimization framework for the multiple-access problem in a hospital environment. The users of e-Health applications (referred to as secondary users) coexist with...
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Whitepapers
A SOA Service Governance Approach to u-Healthcare System With Mobility Capability
April 26, 2011, 12:00am PDT
Ubiquitous systems emphasize in designing services to the users anywhere and anytime regardless of users' locations. Existing mobile systems usually have problems that they lack S.C.A.L.E....
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Whitepapers
Channel Modeling of UWB-Based Wireless Body Area Networks
April 26, 2011, 12:00am PDT
This paper presents channel measurements for Wireless Body Area Network (WBAN) and provides performance evaluation using the model derived from measurement and the model in the final document of...
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Whitepapers
Efficient Tree-Search MIMO Detection With Probabilistic Node Ordering
April 26, 2011, 12:00am PDT
The tree representation of the MIMO detection problem is illuminating for the development, interpretation, and classification of various detection methods. Dijkstra's search-based detection method...
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Whitepapers
Near Optimum Multiuser Detection With Closest Lattice Point Search
April 26, 2011, 12:00am PDT
In this paper, the authors consider a low-complexity multiuser detection for downlink of High Speed Packet Access (HSPA) system. Instead of attempting to perform the Maximum Likelihood (ML)...
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Whitepapers
Efficient Iterative Decoding of Serially Concatenated Multiplexed Alamouti Codes
April 26, 2011, 12:00am PDT
The authors present a low complexity iterative decoding method for a multiplexed Alamouti space-time code serially concatenated by a convolutional code. The space-time signalling code consists of...
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Whitepapers
A Novel Non-Parametric Iterative Soft Bit Error Rate Estimation Technique for Digital Communications Systems
April 26, 2011, 12:00am PDT
This paper addresses the problem of unsupervised soft BER estimation for digital communications systems, where no prior knowledge about transmitted information bits is available. The authors show...
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Whitepapers
Continuous Physical Layer Authentication Using a Novel Adaptive OFDM System
April 26, 2011, 12:00am PDT
Traditional authentication techniques for wireless communications are facing great challenges, due to the open radio propagation environment and limited options of transmission techniques. A new...
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Whitepapers
CFO Compensation for Uplink OFDMA Systems With Conjugated Gradient
April 26, 2011, 12:00am PDT
In this paper, the authors propose an iterative low-complexity Carrier Frequency Offset (CFO) compensation algorithm based on the Conjugate Gradient (CG) method for uplink orthogonal frequency...
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Whitepapers
Combined PA/NPA CFO Recovery for FBMC Transmissions Over Doubly-Selective Fading Channels
April 26, 2011, 12:00am PDT
This paper deals with Carrier Frequency Offset (CFO) recovery for burst-mode filter-bank multicarrier transmission over channels affected by severe time-frequency selective fading. Unlike...
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Whitepapers
Optimal Threshold Design for FFR Schemes in Multi-Cell OFDMA Networks
April 26, 2011, 12:00am PDT
Fractional Frequency Reuse (FFR) is an efficient method to suppress Inter-Cell Interference (ICI) in multi-cell OFDMA networks. In this paper, the optimal threshold is designed for FFR schemes to...
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Whitepapers
Packet Transmission Experiments of STBC-Based Multi-Hop Cooperative Relaying
April 26, 2011, 12:00am PDT
In multi-hop cooperative communications, multiple relay stations are used at each hop in order to enhance transmission performance. In previous studies, transceivers for multi-hop cooperative...
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Whitepapers
Fixed Gain Amplify-and-Forward Relaying With Co-Channel Interference
April 26, 2011, 12:00am PDT
The authors investigate the outage probability and the average Bit Error Rate (BER) of a dual-hop fixed gain relaying system in the presence of co-channel interference and thermal noise at the...
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Whitepapers
RBG Matching Based Optimal Relay Selection and Subchannel Allocation
April 26, 2011, 12:00am PDT
Relay selection has been shown to be a practical and effective way to achieve cooperative diversity. In wide-band OFDM cooperative communication systems with multiple source and destination nodes,...
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Whitepapers
Multi-Frequency GLRT Spectrum Sensing for Wideband Cognitive Radio
April 26, 2011, 12:00am PDT
The problem of spectrum sensing in multi-frequency cognitive radio systems is addressed. The authors show that as the sensed bandwidth increases, the primary user detection is governed by a low...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Autonomous Dynamic Frequency Selection for WLANs Operating in the TV White Space
April 26, 2011, 12:00am PDT
This paper describes the challenges of frequency channel selection for WLANs operating in the TV White Space (TVWS) and proposes a Dynamic Frequency Selection (DFS) technique as the solution....
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Whitepapers
Cross-Layer Interference Mitigation for Cognitive Radio MIMO Systems
April 26, 2011, 12:00am PDT
In this paper, the authors investigate the interference mitigation from a cross-layer perspective for a Cognitive Radio (CR) Multiple-Input Multiple-Output (MIMO) network coexisting with a primary...
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Whitepapers
Cooperative Communication for Spatial Frequency Reuse Multihop Wireless Networks Under Slow Rayleigh Fading
April 26, 2011, 12:00am PDT
Cooperative communication has been proposed as a means to increase the capacity of a wireless link by mitigating the path-loss, fading and shadowing effects of radio propagation. In this paper,...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Maximum-Likelihood Detectors for Full-Rate Cooperative Communication Systems
April 26, 2011, 12:00am PDT
A key issue in the full-rate two-relay cooperative communication systems is the interference which is caused by the simultaneous transmission of the source and one of the relays at any time. In...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Cooperative Interference Control for Spectrum Sharing in OFDMA Cellular Systems
April 26, 2011, 12:00am PDT
This paper studies cooperative schemes for the inter-cell interference control in Orthogonal-Frequency-Division-Multiple-Access (OFDMA) cellular systems. The downlink transmission in a simplified...
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Whitepapers
Smart Cooperation Through Orthogonal Signaling and Optimal Power Allocation
April 26, 2011, 12:00am PDT
In this paper, a novel cooperative transmission scheme based on orthogonal signaling is proposed for two-user cooperative systems. Compared to the traditional cooperation alternatives, in the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Performance Study of Hybrid MAC Using Soft Reservation for Wireless Networks
April 26, 2011, 12:00am PDT
In wireless networks using hybrid MAC, nodes can reserve time periods inside scheduling cycles, and the time that is not reserved can be used by all nodes through contention-based access. The...
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Whitepapers
A Distributed Resource Allocation Algorithm in Heterogeneous Wireless Access Medium
April 26, 2011, 12:00am PDT
In this paper, the radio resource allocation in a heterogeneous wireless access medium for mobile terminals (MTs) with multi-homing capabilities is investigated. A novel algorithm is proposed for...
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Whitepapers
An Efficient Method for Performance Evaluation of Femto-Macro Overlay Systems
April 26, 2011, 12:00am PDT
This paper considers a two-tier femto-macro overlay network architecture, where groups of femtocells are overlaid by macrocells. The capacity of the femtocells is limited, thus redirection of...
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Whitepapers
Optimal Pricing and Spectrum Allocation for Wireless Service Provider on Femtocell Deployment
April 26, 2011, 12:00am PDT
Femtocell technology is regarded as a promising way to deal with poor indoor coverage and increase spectrum spatial reuse. In this paper, the authors focus on the scenario that macro and femto...
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Whitepapers
Dynamic Inter-Cell Interference Avoidance in Self-Organizing Femtocell Networks
April 26, 2011, 12:00am PDT
Femtocells are expected as the surest way to increase the system capacity with higher-quality links and more spatial reuse in future networks. In spite of their great potential, the system...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Game Theoretical Model and Existence of Win-Win Situation for Femtocell Networks
April 26, 2011, 12:00am PDT
Two major access policies are considered in the femtocell network, including the closed access mode and the open access mode. The closed access mode only permits authorized subscribers to utilize...
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Whitepapers
A Novel Multicast Gateway Based Multi-Hop Routing for Wireless Mesh Networks
April 26, 2011, 12:00am PDT
Wireless Mesh Networking (WMN) is a promising candidate for the next generation networks. Nevertheless, existing cutting edge technological standards for WMNs are not perfectly equipped to cater...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Hierarchical Agent-Based Secure Multicast for Wireless Mesh Networks
April 26, 2011, 12:00am PDT
The authors propose and analyze a Hierarchical Agent-based Secure Multicast (HASM) algorithm for efficiently supporting secure mobile multicast in wireless mesh networks, with design...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Scalable and Energy-Efficient Broadcasting in Multi-Hop Cluster-Based Wireless Sensor Networks
April 26, 2011, 12:00am PDT
In large-scale sensor networks, grouping sensor nodes into clusters has been considered as an effective way to achieve network scalability and robustness. Broadcasting over Cluster Heads (CHs) is...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Optimal channel allocation for wireless cities
March 16, 2009, 12:00am PDT
The authors consider the channel and power allocation problem for 802.11b public wireless access networks. They demonstrate exact that joint channel and power optimization is feasible for up to...
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Whitepapers
Modelling Chain for Throughput Estimation in Wireless Networks
March 16, 2009, 12:00am PDT
The motivation for the authors' work was a feasibility study of the use of wireless technologies, more concretely IEEE 802.11, in industrial control systems. The considered application for...
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Whitepapers
Enhanced Protection Mechanism for Improving Co-existence of IEEE 802.11b and IEEE 802.11g Wireless LANs
March 16, 2009, 12:00am PDT
The widespread deployments of Wireless LANs are underpinned by two most popular variants of IEEE 802.11 standards, 802.11b and 802.11g. The 802.11g extends 802.11b to support higher data rate via...
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Whitepapers
Impact of Best Effort Frame Bursting in IEEE 802.11 Networks
March 16, 2009, 12:00am PDT
Wireless LAN strongly prioritizes high priority traffic over low priority best effort traffic. This causes reduced access to the medium for low priority traffic and under some conditions even...
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Whitepapers
Dynamic Contention Window Control Scheme in IEEE 802.11e Wireless LANs
March 16, 2009, 12:00am PDT
In the IEEE 802.11 MAC protocol, Access Points (APs) are given the same authority as Wireless Terminals (WTs) in terms of acquiring the wireless link, even though they aggregate several downlink...
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Whitepapers
A Hybrid CQI Feedback Scheme for 4G Wireless Systems
March 16, 2009, 12:00am PDT
In this paper, the authors propose a novel Channel Quality Indicator (CQI) feedback reduction scheme. In the proposed scheme, the Base Station (BS) calculates the urgency information of each user...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Multiuser Scheduling Over MIMO Nakagami-m Fading Channels: Capacity and BER Performance
March 16, 2009, 12:00am PDT
A performance analysis for the average channel capacity and average Bit Error Rate (BER) of user scheduling schemes for multiuser MIMO systems exploiting the multiuser and antenna diversities over...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Handover Study Concerning Mobility in the Two-Hierarchy Network
March 16, 2009, 12:00am PDT
Femtocell is an emerging technology aiming for a better indoor coverage. Due to its low costs, high grade of service, promotion of Fixed-Mobile Convergence (FMC) and no change of core network, it...
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Whitepapers
On the Throughput Potential of Two-Dimensional Wireless Multi-Hop Networks Using Directional Antennas
March 16, 2009, 12:00am PDT
The goal of this paper is to establish the rate region of a wireless multi-hop, one-sender, two-receiver transmission chain. The authors examine and evaluate the advantages of utilizing...
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Whitepapers
Frequency Interleaved CDMA - A New Multiple Access Technique
March 16, 2009, 12:00am PDT
In this paper, a new multiple access scheme called Frequency Interleaved Code Division Multiple Access (FICDMA) is proposed. The major novelty of this scheme is that it is able to benefit from the...
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Whitepapers
An Improved Reader Anti-Collision Algorithm Based on Pulse Protocol With Slot Occupied Probability in Dense Reader Mode
March 16, 2009, 12:00am PDT
Radio Frequency IDentification (RFID) system is a contactless automatic identification system, which comprises readers and tags. In RFID systems, a reader collision occurs when the communication...
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Whitepapers
A New Blind Synchronization Algorithm for UWB-IR Systems
March 16, 2009, 12:00am PDT
One of the biggest challenges in Ultra-WideBand Impulse Radio (UWB-IR) is timing acquisition. To accomplish synchronization, a novel modulation scheme is presented in this paper. Relying on the...
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Whitepapers
An Efficient Joint Timing and Frequency Offset Estimation for OFDM Systems
March 16, 2009, 12:00am PDT
This paper presents a new joint frame synchronization and frequency offset estimation algorithm for Orthogonal Frequency Division Multiplexing (OFDM) systems as a modification to Zhang's method....
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Whitepapers
Cross-Layer-Optimized User Grouping Strategy in Downlink Multiuser MIMO Systems
March 16, 2009, 12:00am PDT
This paper proposes a cross-layer-optimized user selection and packet transmission technique for the downlink Multi-User (MU) Multiple-Input Multiple-Output (MIMO) system in IEEE 802.11 Wireless...
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Whitepapers
Power Allocation for OFDM Based Links in Hybrid Forward Relay
March 16, 2009, 12:00am PDT
In this paper, the authors consider a two-hop Orthogonal Frequency Division Multiplexing (OFDM) relay link, and investigate the system capacity in Hybrid Forward (HF) relay through the Power...
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Whitepapers
Adaptive Algorithm for Mapping Channel Quality Information to Modulation and Coding Schemes
March 16, 2009, 12:00am PDT
In the present and future generation of wireless networks, link adaptation is used for better channel efficiency. With link adaptation the modulation and coding scheme used for transmissions to a...
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Whitepapers
Group Scheduling for Improving VoIP Capacity in IEEE 802.16e Networks
March 16, 2009, 12:00am PDT
WiMAX networks are considered efficient for supporting data traffic. However, the VoIP capacity of IEEE 802.16e WiMAX system is not great due to the large MAP overhead caused by dynamic scheduling...
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Whitepapers
Performance of Frequency Selective Scheduling and Fractional Frequency Reuse Schemes for WIMAX
March 16, 2009, 12:00am PDT
WiMaX is the commercial name for the 4G OFDM based wireless broadband data transmission standard 802.16, developed by IEEE (and). It is currently being deployed in several countries around the...
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Whitepapers
WiMax MBS Power Management, Channel Receiving and Switching Delay Analysis
March 16, 2009, 12:00am PDT
In Wimax MBS (Multicast-Broadcast System), the power savings and channel switching delay are two critical performance metrics that affects the viewing time capacity and quality of experience of...
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Whitepapers
Bandwidth Allocation for Video Streaming in WiMax Networks
March 16, 2009, 12:00am PDT
The authors describe an analytical model, based on a Markov chain, suitable to study different bandwidth allocation policies for video streams over a WiMax access link. The Markov chain models an...
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Whitepapers
Optimization of Channel Quality Indication Signaling in WiMAX System
March 16, 2009, 12:00am PDT
Proportional Fair (PF) scheduling is a widely used technique in recent wireless communication systems. However, scheduling will also bring about a lot of signaling overhead especially in OFDMA...
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Whitepapers
Link Level Simulation Study of Downlink MIMO and Uplink HARQ in IEEE 802.16e Wimax System
March 16, 2009, 12:00am PDT
The performance of the UpLink (UL) and DownLink (DL) of IEEE 802.16e-2005 or Worldwide Inter-Operability Microwave Access (WiMAX) standard is studied via extensive computer simulations in this...
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Whitepapers
An Enhancement of Sleep Mode Operation in IEEE 802.16e Systems
March 16, 2009, 12:00am PDT
IEEE 802.16e has specified sleep mode operations depending on different types of power saving class for the purpose of energy saving. To solve the inefficient problem of multiple power saving...
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Whitepapers
Dynamic Frequency Planning Versus Frequency Reuse Schemes in OFDMA Networks
March 16, 2009, 12:00am PDT
In order to avoid inter-cell interference, OFDMA networks are flexible in terms of radio resource management techniques, supporting different Frequency Reuse Schemes (FRSs), which in turn, may...
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Whitepapers
Temporal and Spatial Spectrum Assignment in Next Generation OFDMA Networks Through Reinforcement Learning
March 16, 2009, 12:00am PDT
This paper proposes a Dynamic Spectrum Assignment strategy in the context of next generation multicell Orthogonal Frequency Division Multiple Access networks. The proposed strategy is able to...
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Whitepapers
Comparison of Spectrum Sharing Techniques for IMT-A Systems in Local Area Networks
March 16, 2009, 12:00am PDT
The explosive growth of mobile communications on one hand and the overly crowded and expensive spectrum on the other hand have fueled hot debates on spectrum sharing techniques, anticipating...
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Whitepapers
On the Applicability of Image Processing Techniques in the Radio Environment Characterisation
March 16, 2009, 12:00am PDT
This paper presents a novel framework based on image processing techniques for the radio environment characterisation. Specifically, after digitalising a given scenario in accordance with the...
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Whitepapers
Interference Aware Scheduling for Soft Frequency Reuse
March 16, 2009, 12:00am PDT
In this paper, the authors present an interference aware phased scheduling strategy for a Soft Frequency Reuse (SFR) interference coordination scheme in an Orthogonal Frequency Division Multiple...
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Whitepapers
Performance Analysis of Proportional Fair Scheduling With Partial Feedback Information for Multiuser Multicarrier Systems
March 16, 2009, 12:00am PDT
The authors consider multiuser multicarrier systems, where each non-symmetrically distributed user reports only partial indices of subcarriers whose normalized SNRs exceed the predetermined...
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Whitepapers
HYGIENE Scheduling for OFDMA Wireless Cellular Networks
March 16, 2009, 12:00am PDT
Packet scheduling algorithms are viewed as one of the key mechanisms for increasing the diversity order, robustness and effectiveness of a wireless multi-user communication system. Traditional...
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Whitepapers
An Asymptotically Fair Subcarrier Allocation Algorithm in OFDM Systems
March 16, 2009, 12:00am PDT
Dynamic subcarrier allocation improves the performance of OFDM systems by exploiting multi-user diversity. Fairness index is a parameter which indicates how fairly the subcarriers are allocated...
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Whitepapers
Opportunistic Scheduling and Adaptive Modulation in Wireless Networks With Network Coding
March 16, 2009, 12:00am PDT
So far, many researches on network coding are performed with higher layer protocols such as MAC, routing, and flow control protocols without consideration of physical layer issues such as channel...
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Whitepapers
A Simple and Efficient Data Forwarding Mechanism in Wireless Relay Networks
March 16, 2009, 12:00am PDT
Wireless relay network is a low-cost solution for extending the service coverage and increasing the throughput of the conventional single-hop wireless network. By deploying a relay network, a Base...
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Whitepapers
Distributed Point Coordination Function for Wireless Ad Hoc Networks
March 16, 2009, 12:00am PDT
In this paper, the authors describe a new MAC protocol for ad hoc networks called Distributed Point Coordination Function (DPCF). It constitutes an extension of the PCF of the IEEE 802.11 Standard...
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Whitepapers
Effect of Relaying on Coverage in 3GPP LTE-Advanced
March 16, 2009, 12:00am PDT
Current broadband wireless networks are characterized by large cell sizes. Yet, even in advanced networks that will be built using 3GPP Long Term Evolution (LTE), also referred to as 3GPP...
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Whitepapers
A Novel Rate Allocation Scheme For Throughput Maximization Considering Rate Fairness in Wireless Relay Systems
March 16, 2009, 12:00am PDT
This paper proposes a rate allocation scheme for throughput maximization considering rate fairness in wireless relay systems. The throughput maximization problem is formulated to two link data...
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Whitepapers
Cross-Layer Analysis of Cognitive Radio Relay Networks Under Quality of Service Constraints
March 16, 2009, 12:00am PDT
In this paper, the authors investigate the performance gains of cognitive radio relay networks under delay Quality of Service (QoS) limitations at the secondary users, and spectrum-sharing...
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Whitepapers
On the Performance of Device-to-Device Underlay Communication With Simple Power Control
March 16, 2009, 12:00am PDT
The authors address Device-To-Device (D2D) communication as a potential resource reuse technique underlaying the cellular network. They consider the shared channel of the two systems as an...
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Whitepapers
Short-Term Power Allocation for Slowly Fading Channels Based on Markov Prediction
March 16, 2009, 12:00am PDT
An optimal power allocation algorithm for delay-limited energy-constrained data transmission in block-fading channels, where blocks are separated in time, is proposed in this paper. Using this...
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Whitepapers
Simplified Cross-Layer Optimization for Power Allocation in MIMO-OFDM Systems
March 16, 2009, 12:00am PDT
This paper suggests an efficient power allocation scheme for Multiple Input and Multiple Output - Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems achieving near-optimum. The authors...
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