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wi-fi
(8751 results)-
White Papers
Two Modified L2S Interface Methods for Mixed Modulation Scheme
July 1, 2008 12:00am PDT
In current wireless system performance evaluation, separate link and system level simulators are needed due to less computation complexity. The Link-To-System (L2S) interface method to...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Microwave Photonic 60-GHz Wireless Link for Gigabit Connectivity
July 1, 2008 12:00am PDT
The communication networks have been evolving into the converged one to provide versatile broadband services. The convergence of wired and wireless communication infrastructures is also expected...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Connectivity of Wireless Ad Hoc Networks With Random Beamforming: An Analytical Approach
July 1, 2008 12:00am PDT
Random beamforming, where each node selects a main beam direction without any coordination with other nodes, has been proposed as a simple technique to improve connectivity in wireless ad hoc...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Direct Transmission Protection in IEEE 802.11 Networks
July 1, 2008 12:00am PDT
In this paper, the authors discuss some problems related to direct transmissions between QSTAs in an infrastructure 802.11 WLAN with a legacy Access Point (AP). In the infrastructure mode,...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Exact Performance of Wireless Multihop Transmission for M-Ary Coherent Modulations Over Generalized Gamma Fading Channels
July 1, 2008 12:00am PDT
Multihop relaying technology in which two terminals are communicating with each other via relaying terminals, is an inspiring and expected solution for such quality requirements as throughput,...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Spectral Efficiency Enhancement With Interference Cancellation for Wireless Relay Network
July 1, 2008 12:00am PDT
The introduction of relaying into wireless communication system for coverage enhancement can cause severe decrease of spectral efficiency due to the requirement on extra radio resource. In this...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Modeling Hidden Terminals in IEEE 802.11 Networks
July 1, 2008 12:00am PDT
Analytic performance of IEEE 802.11 distributed coordination function that takes into account hidden node problem and unsaturated traffic condition is presented for symmetric networks. This...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Advanced Wireless IP Access System (WIPAS) for Fixed Wireless Access (FWA) - Broadband Access System for Triple Play Services by "Fiber + Radio"-
July 1, 2008 12:00am PDT
In 2003, Nippon Telegraph and Telephone Corporation (NTT) commercialized the Wireless IP Access System (WIPAS), a point-to-multipoint Fixed Wireless Access (FWA) system utilizing the 26-GHz...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
IEEE 802.11 Distributed Coordination Function Service Time and Queuing Delay Analysis Using Parallel Space - Time Markov Chain
July 1, 2008 12:00am PDT
In this paper, using the so-called Parallel Space-Time Markov Chain (PSTMC) framework the authors analyze the IEEE 802.11 Distributed Coordination Function (DCF) frame service time, jitter, and...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Adjacent Channel Interference Resistance of a Multi-Gbps Millimeter-Wave WPAN System
July 1, 2008 12:00am PDT
Short-range-high-speed wireless communication systems are rapidly dominating the recent wireless technology trend. Indoor wireless applications such as uncompressed video streaming and high speed...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Golay Sequence Aided Channel Estimation for Millimeter-Wave WPAN Systems
July 1, 2008 12:00am PDT
A 60 GHz unlicensed band has attracted much attention for building new Wireless Personal Area Network (WPAN) systems. The promising applications of these WPAN systems are file transferring between...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Design Support for Wireless Sensor Networks Based on the IEEE 802.15.4 Standard
July 1, 2008 12:00am PDT
Within this paper a modeling environment for Wireless Sensor Networks (WSNs) is proposed. This environment consists of a framework, which represents the behavior of Wireless Sensor Networks (WSN)...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Four-Way TOA and Software-Based Trilateration of IEEE 802.11 Devices
July 1, 2008 12:00am PDT
In this paper the authors present an algorithm that measures the round trip times of IEEE 802.11 MAC packets in order to trilaterate WLAN nodes. They show that if one use packet sequences (e.g.,...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
A Differentiated Cooperative MAC for QoS Enhancement in Wireless LANs
July 1, 2008 12:00am PDT
The Quality of Service (QoS) support in Wireless Local Area Networks (WLANs) faces a big challenge due to timecorrelated fading channel. Conventional Automatic Repeat reQuest (ARQ) schemes based...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Bandwidth Estimation and Distributed Traffic Regulation in Wireless Local Area Networks
July 1, 2008 12:00am PDT
In this paper, the authors introduce distributed traffic regulation for Wireless Local Area Networks (WLANs) operating in ad hoc mode. They use the concept of service curve to determine the...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
OMEGA ICT Project: Towards Convergent Gigabit Home Networks
July 1, 2008 12:00am PDT
Gigabit home networks represent a key technology to make the Future Internet success a reality. The OMEGA European project aims to define and demonstrate such networks. Consumers will require...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Area Throughput for CSMA Based Wireless Sensor Networks
July 1, 2008 12:00am PDT
In this paper the authors present a mathematical approach to evaluate the Area Throughput of a multi-sink Wireless Sensor Network (WSN), where nodes transmit their packets to a sink, selected...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
A New Technique to the Channel Assignment Problem in Mobile Communication Networks
July 1, 2008 12:00am PDT
Channel allocation has been considered a NP-complete problem, and involves a very important issue for the adequate dimensioning of wireless communication networks. One of the possibilities for its...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
On Quasi-Equally Spaced Sampling in Wireless Sensor Networks
July 1, 2008 12:00am PDT
In this paper the authors study wireless sensor networks for monitoring applications. They focus on the problem of sampling and reconstruction of multidimensional bandlimited signals, when the...
Provided by: Institute of Electrical and Electronics Engineers
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White Papers
Modelling Interference Margins in FFR Enabled WiMAX Systems for Cell Dimensioning
July 1, 2008 12:00am PDT
WiMAX technology has gained worldwide attention due to its potential for providing ubiquitous, broadband wireless access at a competitive cost and quality basis to the current DSL (Digital...
Provided by: Institute of Electrical and Electronics Engineers
