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(34700 results)-
White Papers
Design of GPS-GPRS Module for Localization Vehicles and Cargo
August 20, 2007 12:00am PDT
GPS service market is one of the fastest developing branches of industry in the world. After the introduction of GPS system for civil users, the number of users is growing rapidly and methods of...
Provided by: Silesian University of Technology
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Whitepapers
Uplink Capacity of Single-Carrier Frequency -Interleaved Spread Spectrum Multiple Access
August 20, 2007 12:00am PDT
A Single-Carrier Frequency-Interleaved Spread Spectrum Multiple Access (SC-FI-SSMA), which the authors recently proposed, uses frequency-domain interleaving and MMSE-FDE to remove the uplink...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A Power-Controlled 2-Dimensional Block Spread DSCDMA Cellular System With Uplink Site Selection Diversity
August 20, 2007 12:00am PDT
2-Dimensional (2D) block spread Direct Sequence-Code Division Multiple Access (DS-CDMA) allows uplink mutlirate/ mutli-connection transmissions without causing a serious Multi-Access Interference...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Single-Carrier HARQ Using Joint THP and FDE
August 20, 2007 12:00am PDT
In the next generation mobile communication systems, high-speed and high-quality packet data services are demanded. Hybrid ARQ (HARQ) is known as one of the promising error control techniques for...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
LDPC-Coded HARQ Throughput Performance of MC-CDMA Using ICI Cancellation
August 20, 2007 12:00am PDT
Broadband packet data services are demanded in the next generation mobile communications systems. Multi-Carrier CDMA (MC-CDMA) is considered to be a promising wireless technique. Hybrid ARQ (HARQ)...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A Novel Frequency Reuse Scheme for Multi-Cell OFDMA Systems
August 20, 2007 12:00am PDT
In this paper, the authors propose a novel frequency reuse scheme for multi-cell Orthogonal Frequency Division Multiplexing Access (OFDMA) systems for Co-Channel Interference (CCI) reduction. They...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Uplink Power Control for an OFDMA Mobile Cellular System
August 20, 2007 12:00am PDT
In this paper, the authors will investigate the effects of uplink closed-loop power control in a mobile cellular system that employs OFDMA multiple access for the uplink. Analytical results are...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Power Fairness in a Scalable Ring-Based Wireless Mesh Network
August 20, 2007 12:00am PDT
The Wireless Mesh Network (WMN) is an essential low-power solution to support ubiquitous broadband services. However, mesh networks face the power unfairness and throughput bottleneck issues....
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Automated Up-And Downlink Capacity Balancing in WCDMA Networks
August 20, 2007 12:00am PDT
Dynamic optimization of UMTS systems has been gaining a growing interest by the research community. In this context, the current paper concentrates on dynamic automated tuning of RRM parameters to...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Energy-Optimized Low-Complexity Control of Power and Rate in Clustered CDMA Sensor Networks with Multirate Constraints
August 20, 2007 12:00am PDT
In this paper, the authors propose a low-complexity scheme for minimizing energy consumption in a clustered multi-rate CDMA sensor network with multiple receive antennas by jointly controlling the...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Distributed and Centralized Mobility-Aware Caching Schemes for Collaborative Service Provision in User-Deployed Networks
August 20, 2007 12:00am PDT
Opening up to public access, a collection of userdeployed APs has the potential to reduce service costs and improve user service perception, especially for delay tolerant services. However, since...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Impact of HSDPA Radio Resource Allocation Schemes on the System Performance of UMTS Networks
August 20, 2007 12:00am PDT
In UMTS networks, HSDPA users share radio resources like transmit power and OSVF codes with QoS-users, which use dedicated channels as primary transport method. Several options for the resource...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Assessment of Access Selection and Transmit Diversity in (Non) Cosited Multi-Access Networks
August 20, 2007 12:00am PDT
Multi-access networks integrate a number of Radio Accesses (RAs) over which a data flow may be transmitted. Considering the possibility of Multi-Radio Transmit Diversity (MRTD), where a given flow...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Active Queue Management for Reducing Downlink Delays in WiMAX
August 20, 2007 12:00am PDT
In WiMAX networks, the Base Station (BS) is a likely bottleneck for DownLink (DL) TCP connections due to difference in available bandwidth between the fixed network and the wireless link. This may...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A Novel Location Model for 4G Mobile Communication Networks
August 20, 2007 12:00am PDT
A novel location model for 4G mobile communication networks is proposed in the paper. The model utilizes the more precise relative distance estimated by short-range signals between the destination...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Localization Based on Feasible Geographic Region Approximation
August 20, 2007 12:00am PDT
Most traditional localization approaches, providing single position estimate for each sensor node, cannot evaluate localization accuracy and position uncertainty. In this paper, the authors...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A Mobility Management Technique with Simple Handover Prediction for 3G LTE Systems
August 20, 2007 12:00am PDT
Fast and seamless handover are also weighty issues in 3G LTE systems. Although cross-layer optimization and mobility prediction are well-known techniques for obtaining that goal, they have not...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
A Bayesian Network and Rule-Base Approach Towards Activity Inference
August 20, 2007 12:00am PDT
In this paper, the authors describe an activity recognition system capable of monitoring user activities in home environments. Activities are monitored by processing information from various...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Access Mechanism for Multihop Cellular Networks
August 20, 2007 12:00am PDT
The authors propose a CDMA-OFDM access mechanism for Multihop Cellular Networks (MCN). They construct groups within the MCN, where each group comprises of a source node, a destination node, their...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Piggybacking Scheme of MAP IE for Minimizing MAC Overhead in the IEEE 802.16e OFDMA Systems
August 20, 2007 12:00am PDT
This paper analyzes Media Access Control(MAC) overhead of the IEEE 802.16e systems and shows that it causes to degrade system performance critically. MAP, a control message about resource...
Provided by: Institute of Electrical & Electronic Engineers
