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(230 results)Search the Library
Mission Statement
TechRepublic's ITPapers is the Web's largest library of free technical IT white papers, webcasts, and case studies. Covering IT categories including Data Management, IT Management, Networking, Communications, Enterprise Applications, Storage, Security and much more, TechRepublic's White Paper Directory is the best source for technical white papers and IT information.
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Whitepapers
An Open Source Galileo E1 Software Receiver
Oct 2012
This paper presents an open source implementation of a GNSS software receiver that targets Galileo E1B and E1C signals. After discussing the signal structure and the general architecture of the...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
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Whitepapers
Resource Management in Satellite Communication Systems: Heuristic Schemes and Algorithms
May 2012
The high cost of frequency bandwidth in satellite communication emphasizes the need for good algorithms to cope with the resource allocation problem. In systems using DVB-S2 links, the...
Provided by Hindawi Publishing
-
Whitepapers
Design and Implementation of PCM Decommutator on a Single FPGA
Sep 2012
After frame synchronization, individual measurands are identified according to the frame location. The decommutator identifies and extracts Embedded Asynchronous Data Stream (EADS) words. Thus PCM...
Provided by International Journal of Advanced Research in Computer and Communication Engineering (IJARCCE)
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Whitepapers
Applications of Spiro Helical Antenna in Satellite Communications
Aug 2012
A novel antenna made of a spiral wire wrapped into a larger helical shape is introduced. The geometry of this antenna, which is a doubly helical structure, is fully described by five independent...
Provided by Creative Commons
-
Whitepapers
A Survey of Classical Methods and New Trends in Pansharpening of Multispectral Images
Nov 2011
There exist a number of satellites on different earth observation platforms, which provide multispectral images together with a panchromatic image, that is, an image containing reflectance data...
Provided by EURASIP
-
Whitepapers
Innovative DAMA Algorithm for Multimedia DVB-RCS System
Jan 2013
Satellite is often used as an access network in the next generation networks landscape, where multimedia and real-time services are supported by return channels. However, these satellite return...
Provided by EURASIP
-
Whitepapers
Satellite Image Classification Using Fuzzy Rule Classifier
Nov 2012
The proposed technique is used to classify the satellite image into barren land, vegetation area, building area and road area. Initially, the satellite image is pre-processed and then is then...
Provided by EuroJournals
-
Whitepapers
The Power Budget of the Reception Signal for the Satellite Broadcast Service From Brazil to the Middle East and Europe
Jun 2012
Telecommunications companies operating of the direct broadcast satellite service is making maximum efforts to secure the transduction TV signal from the source to the recipients in the small...
Provided by EuroJournals
-
Whitepapers
Asymptotically Optimal Channel Feedback Protocol Design for Cognitive Multiple Access Channels
Nov 2012
In cognitive multiple access networks, primary secondary feedback links are needed to convey Secondary Transmitter Primary Base station (STPB) channel gains from the Primary Base Station (PBS) to...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
Very High Resolution Optical Satellites for DEM Generation: A Review
Feb 2011
The advent of Very High Resolution (VHR) optical satellites capable of producing stereo images led to a new era in extracting digital elevation model which commenced with the launch of IKONOS. The...
Provided by EuroJournals
-
Whitepapers
Simulation Based Analysis of RTT with PER, Buffer Size and Congestion Levels for Satellite Based Networks
Mar 2012
Round Trip Time values constitute one of the significant parameter available to a TCP sender for estimating the network conditions. The RTT has a significant effect on the throughput of a...
Provided by International Journal of Computer Applications
-
Whitepapers
Research on Objective Sorting Algorithm of Geo Communication Satellite Based on Fuzzy Theory
Jan 2013
GEO (Geostationary Earth Orbit) communication satellites are important guarantee for the war. The authors should research the sorting for attack if they want to win the war. Performance parameters...
Provided by ISSN
-
Whitepapers
Optimized Resource in Satellite Network Based on Genetic Algorithm
Dec 2012
Satellite network is an all-around network which has high-complexity, dynamic and enormous, and its resources are very limited. So, the authors have to optimize the resources on satellite network....
Provided by ISSN
-
Whitepapers
Yaw Phase Mode Attitude Control Using Z Wheel for LEO Microsatellite
Feb 2008
A control system is proposed for a low Earth orbit gravity gradient stabilized microsatellite using Z wheel. The microsatellite is 3-axis stabilized using a yaw reaction wheel with dual redundant...
Provided by WSDOT
-
Whitepapers
The System Transfering Between Laser-Satellites
Mar 2008
Laser inter-satellite communication is on the verge of becoming a reality. It will be a key building block for wide-area space data networks of the future. Design methodologies treating these as...
Provided by WSDOT
-
Whitepapers
Analytic Solution of Nadir Attitude Pointing for LEO Microsatellite
Apr 2008
A spacecraft in orbit always needs to stabilize the attitude against the external disturbance torques acting on it. Attitude control usually needs to be autonomous or semi-autonomous. On Alsat-1,...
Provided by WSDOT
-
Whitepapers
Markovian Chain Analysis in ALOHA for Satellite Applications
Sep 2008
The system with a lot of lightly loaded users can be optimized with a Random Multiple Access (RMA). In this kind of system, the transmission media is employed at the time the information is being...
Provided by NORTH ATLANTIC UNIVERSITY UNION
-
Whitepapers
Multiuser Detection Performance in Multibeam Satellite Links Under Imperfect CSI
Jan 2013
In multibeam satellite systems, there is a growing need for signal processing techniques able to mitigate the interference among beams, since they could enable a much more aggressive spectrum...
Provided by University of Vienna
-
Whitepapers
Performance Analysis of Multiuser Detection for Multibeam Satellites Under Rain Fading
Jul 2012
Multibeam satellite systems are nowadays widely employed, and their use is expected to grow in the next decades. This has raised the interest for signal processing techniques able to mitigate the...
Provided by University of Vienna
-
Whitepapers
Comparison of Post-Filtering Methods for Intelligibility Enhancement of Telephone Speech
Aug 2012
Post-filtering can be used to enhance the quality and intelligibility of speech in mobile phones. This paper introduces two straightforward post-filtering methods for near-end speech enhancement...
Provided by University of Heilongjiang
-
Whitepapers
Processing and Analysis of Satellite Images To Detect Vegetation
Mar 2012
Satellite images have many applications like meterology, agriculture, geology, forestry, landscape warfare etc. Interpretation and analysis of satellite imagery is conducted using specialized...
Provided by International Journal of Communications and Engineering
-
Whitepapers
Digital Video Broadcasting-Satellite to Handheld Services
Feb 2013
Universal education is the dream of India and more so with the passing of 'Right to Education bill' in the country. Looking to the diverse culture and vividity in the country it is not possible to...
Provided by International Journal of Innovations in Engineering and Technology (IJIET)
-
Whitepapers
Enhancement of Satellite Image Resolution With Moving Objects
Feb 2013
Satellite images are being used in many applications like Meteorology, Agriculture, Geology, Forestry, Landscape, Biodiversity, Planning, Education, Regional, Seismology and oceanography. The...
Provided by IOSR Journal of Engineering
-
Whitepapers
On Possible A-Priori "Imprinting" of General Relativity Itself on the Performed Lense-Thirring Tests with LAGEOS Satellites
Dec 2009
The term "GravitoMagnetism" (GM) denotes those gravitational phenomena concerning orbiting test particles, precessing gyroscopes, moving clocks and atoms and propagating electromagnetic waves...
Provided by Scientific Research
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Whitepapers
An Approach for a Standard Polynomial for Cyclic Redundancy Check
Dec 2011
In this paper Cyclic Redundancy Check codes are implemented to detect the effectiveness of various types of errors that might occur during the transmission of data stream carrying message signal...
Provided by International Journal of Computer Applications
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Whitepapers
The Injection Velocity and Apogee Simulation for Transfer Elliptical Satellite Orbits
Mar 2012
Basic resources for communication satellites are communication radio-frequencies and satellite orbits. An orbit is the trajectory followed by the satellite. The communication between the satellite...
Provided by Scientific Research
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Whitepapers
The Range and Horizon Plane Simulation for Ground Stations of Low Earth Orbiting (LEO) Satellites
Sep 2011
Communication via satellite begins when the satellite is positioned in the desired orbital position. Ground stations can communicate with LEO (Low Earth Orbiting) satellites only when the...
Provided by Scientific Research
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Whitepapers
A New Method for Fast and Low Cost Handover in Leo Satellites
Jan 2012
Now-a-days LEO satellites have an important role in global communication system. They have some advantages over GEO & MEO satellites such as power requirement and end-to-end delay is lower and it...
Provided by International Journal of Computer Applications
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Whitepapers
The ANFIS System for Nonlinear Combined Forecasts in the Telecommunications Industry
Jan 2012
The Adaptive Network-Based Fuzzy Inference System (ANFIS) has been proven to be efficient for forecasting. To address this concern, this research develops a nonlinear combined forecasting system...
Provided by International Journal of Computer Applications
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Whitepapers
Rain Attenuation Impact on Performance of Satellite Ground Stations for Low Earth Orbiting (LEO) Satellites in Europe
Sep 2009
Low Earth Orbits (LEO) satellites are used for public communication and for scientific purposes. These satellites provide opportunities for investigations for which alternative techniques are...
Provided by Scientific Research
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White Papers
Yet Another Intrusion Detection System Against Insider Attacks
Jan 2008
Intrusion Detection System (IDS) originated as a mechanism for managing the detection of system misuse through the analysis of activity. Despite that the various attacks are occurred by insiders...
Provided by Information and Communications University
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White Papers
Response Rate and Measurement Differences in Mixed-Mode Surveys Using Mail, Telephone, Interactive Voice Response (IVR) and the Internet
May 2008
The potential for improving response rates by changing from one mode of data collection to another mode and the consequences for measurement and nonresponse errors are examined. Data collection...
Provided by Reed Elsevier
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White Papers
Network Controlled Joint Radio Resource Management for Heterogeneous Networks
Jan 2008
In this paper, the authors propose a way of achieving optimality in Radio Resource Management (RRM) for heterogeneous networks. They consider a micro or femto cell with two co-localized Radio...
Provided by Telecom ParisTech
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White Papers
Integrating Multiple and Heterogeneous Challenged Networks - Detailed Design and Experimental Evaluation Using Satellite Link -
Feb 2010
Motivated by the question of how to quickly transfer large-sized file if multiple and heterogeneous networks are available but each has insufficient performance for the requested task, the authors...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
PLATINE: DVB-S2/RCS Enhanced Testbed for Next Generation Satellite Networks
Jan 2009
Emulation is a cost effective and efficient tool to perform performances evaluation and innovative access and network techniques validation. Its ability to interconnect real equipments with real...
Provided by CNRS
-
Case Studies
Memorial Hospital Case Study
Nov 2010
Memorial Hospital is a not-for-profit independent community hospital that serves the acute and primary care needs of more than 40,000 residents of Union County and five surrounding counties. The...
Provided by DigitalPersona
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White Papers
Performance Evaluation of Dynamic Spectrum Assignment and Access Technologies
Jul 2008
Implementing dynamic spectrum assignment and access technologies in heterogeneous wireless networks may lead to considerable improvement in spectrum usage and quality of service. In this paper the...
Provided by Institute of Electrical and Electronics Engineers
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Case Studies
How Cisco IT Trained Users for Migration to Global Voicemail System
Dec 2007
For some users, voice messaging is simply a way to capture missed phone calls, but for others it is a business-critical application. Major employee training was in order when Cisco began migration...
Provided by Cisco Systems
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Whitepapers
Information Extraction From Voicemail
Jan 2008
This paper addresses the problem of extracting key pieces of information from voicemail messages, such as the identity and phone number of the caller. This task differs from the named entity task...
Provided by IBM
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White Papers
Space-Based FPGA Radio Receiver Design
Sep 2010
Los Alamos has recently completed the latest in a series of Reconfigurable Software Radios, which incorporates several key innovations in both hardware design and algorithms. Due to the authors'...
Provided by Hindawi Publishing
-
Podcasts
WebSphere Message Broker for Z/OS: What It Is and How to Use It as an ESB
Jan 2008
In this podcast, the speaker talks about WebSphere Message Broker for z/OS, its advantages on the z platform and its role as an enterprise service bus. The speaker also discusses the recently...
Provided by IBM
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White Papers
A Novel Satellite Data 3-Dimensional Visualization Method
Nov 2011
In the solution to the problem of 3 d visualization of satellite data, such as accurate cloud, ignorance of visual impact mask gray, transparency and positioning, the author puts forward a series...
Provided by Tianjin Polytechnic University
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White Papers
A Multichannel Satellite Scheduling Algorithm
Jul 2008
During the design process of the South African Sumbandilasat satellite, a requirement was identified for a store-and-forward type on-board communications payload. This will allow for connectivity...
Provided by University of Stellenbosch
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White Papers
Adaptive Demodulation With Differentially Coherent Detection
Nov 2007
Adaptive DeModulation (ADM) is a new rate adaptive technique wherein the receiver demodulates only the most reliable bits and treats unreliable bits as erasures. This paper derives the optimum and...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Experimental Study on Gaussian-Modulated Coherent States Quantum Key Distribution Over Standard Telecom Fiber
Sep 2007
In this paper, the authors present a fully fiber-based one-way Quantum Key Distribution (QKD) system implementing the Gaussian-Modulated Coherent States (GMCS) protocol. The system employs a...
Provided by University of Toronto
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White Papers
Satellite Time Code Format Generation and Interfacing to Computer With RS-232 Using UART Developed in VHDL
Jan 2012
National Remote Sensing Center (NRSC) receives data from different remote satellites like IRS-P6, IRSP5, Cartosat-2, Cartosat-2a, etc., and processes it depending on the user requirements. The...
Provided by Journal of Theoretical and Applied Information Technology
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White Papers
What Are You Looking For: Identification of Remnant Communication Artefacts in Physical Memory!
Dec 2010
Law enforcement has sound methods for investigating and obtaining data about targets that are using traditional communication services such as the Public Switched Telephone Network. The Internet...
Provided by University of South Australia
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White Papers
A Study for an Adaptive Anti-Jamming Antenna for the User Receiver of the GEO Satellite Communication System
Jan 2012
The separation angle between Geostationary Earth Orbit (GEO) satellites tends to be smaller owing to the increasing demand of high-speed fixed satellite services. This will increase the...
Provided by International Association of Computer Science & Information Technology (IACSIT)
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White Papers
Study on Energy Efficient IPTV Settop Box
Jan 2012
The potential exists for substantial energy savings from more efficient Set-Top Boxes (STBs), including digital TV converter boxes, cable boxes, and satellite receivers/tuners. Much of this...
Provided by International Association of Computer Science & Information Technology (IACSIT)
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White Papers
A Hybrid Satellite-Terrestrial Cooperative Network Over Non Identically Distributed Fading Channels
Oct 2011
This paper investigates a Hybrid Satellite-Terrestrial Cooperative relaying Communications Network (HSTCN) under independent and non-identical shadowed Rician and Nakagami-m fading channels. It...
Provided by Academy Publisher
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White Papers
Detecting Intention-Violation Feature Interaction in NGN Based on Feature Re-presentation
May 2010
In the evolving telecom networks such as Next Generation Network (NGN), service design is open to the third-party. The feature logic will be kept private for business purpose. This makes it hard...
Provided by Academy Publisher
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White Papers
Do Next Generation Networks Need Path Diversity?
Mar 2009
The authors have currently reached a phase where big shifts in the network traffic might impose to rethink the design of current architectures, and where new technologies, being pushed into...
Provided by Telecom ParisTech
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White Papers
Research on Evolution of Chinese Telecom Industry System Based on Dissipative Structure Theory
Apr 2011
In this paper, the self-organization evolution mechanism of the telecom industry which is regarded as a complex system is studied based on dissipative structure theory by taking into account the...
Provided by Academy Publisher
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White Papers
Design and Implementation of Small Satellite Flexible Test Bed
Jun 2011
This paper analyzes the character and performance of the synthesized test bed on ground of small satellites. By studying several small satellite systems, the hardware and software architectures of...
Provided by Academy Publisher
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White Papers
Acquisition Performance Analysis of BOC Signal Considering the Code Search Step Size
Jul 2011
The Binary Offset Carrier (BOC) proposed for next generation of Global Navigation Satellite Systems (GNSS) will enhance navigation performance and spectrum compatibility. However, the acquisition...
Provided by Academy Publisher
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White Papers
Performance Analysis of a Patch Antenna Array Feed for a Satellite C-Band Dish Antenna
Nov 2011
This paper proposes a patch antenna array as an alternative feed for dish antennas on board satellites to solve the weight problem constituted by conventional feed horns. An 8x1 linear, C-Band,...
Provided by University of Ilorin
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White Papers
Differential Geometric Approach to Change Detection Using Remotely Sensed Images
Aug 2011
Change Detection using multi-temporal satellite images of same area is an established as well as actively pursued research problem. Most of the change detection techniques use algebraic or...
Provided by Academy Publisher
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White Papers
The Capacity Region of a Class of 3-Receiver Broadcast Channels With Degraded Message Sets
Jun 2009
Korner and Marton established the capacity region for the 2-receiver broadcast channel with degraded message sets. Recent results and conjectures suggest that a straightforward extension of the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Cylindrical Dielectric Resonator Antennas with Harmonic Control as an Active Antenna Radiator
Jan 2009
A cylindrical dielectric resonator antenna is proposed as a radiator for an active integrated antenna. Harmonic tuning, which is the key step in designing active antenna radiators, is achieved via...
Provided by Hindawi Publishing
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White Papers
Ku Band Hemispherical Fully Electronic Antenna for Aircraft in Flight Entertainment
Mar 2009
The results obtained in the frame of the ESA activity "Advanced Antenna Concepts For Aircraft In Flight Entertainment" are presented. The aim of the activity consists in designing an active...
Provided by Hindawi Publishing
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White Papers
Comparison of Measured Rain Attenuation in the 12.25-GHz Band with Predictions by the ITU-R Model
Jul 2011
Quantitative analysis and prediction of radio attenuation is necessary in order to improve the reliability of satellite-earth communication links and for economically efficient design. For this...
Provided by Hindawi Publishing
-
White Papers
Space-Based FPGA Radio Receiver Design
Sep 2010
Los Alamos has recently completed the latest in a series of Reconfigurable Software Radios, which incorporates several key innovations in both hardware design and algorithms. Due to the authors'...
Provided by Hindawi Publishing
-
White Papers
Performance Evaluation of Dynamic Spectrum Assignment and Access Technologies
Jul 2008
Implementing dynamic spectrum assignment and access technologies in heterogeneous wireless networks may lead to considerable improvement in spectrum usage and quality of service. In this paper the...
Provided by Institute of Electrical and Electronics Engineers
-
Case Studies
Jackson Hospital Case Study
Jul 2010
Jackson Hospital is one of the largest not-for-profit community hospitals in Alabama. Jackson Hospital needed a solution that would meet these mandates, while providing a fast and convenient...
Provided by DigitalPersona
-
Case Studies
Memorial Hospital Case Study
Nov 2010
Memorial Hospital is a not-for-profit independent community hospital that serves the acute and primary care needs of more than 40,000 residents of Union County and five surrounding counties. The...
Provided by DigitalPersona
-
White Papers
PLATINE: DVB-S2/RCS Enhanced Testbed for Next Generation Satellite Networks
Jan 2009
Emulation is a cost effective and efficient tool to perform performances evaluation and innovative access and network techniques validation. Its ability to interconnect real equipments with real...
Provided by CNRS
-
White Papers
Integrating Multiple and Heterogeneous Challenged Networks - Detailed Design and Experimental Evaluation Using Satellite Link -
Feb 2010
Motivated by the question of how to quickly transfer large-sized file if multiple and heterogeneous networks are available but each has insufficient performance for the requested task, the authors...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Network Controlled Joint Radio Resource Management for Heterogeneous Networks
Jan 2008
In this paper, the authors propose a way of achieving optimality in Radio Resource Management (RRM) for heterogeneous networks. They consider a micro or femto cell with two co-localized Radio...
Provided by Telecom ParisTech
-
White Papers
Response Rate and Measurement Differences in Mixed-Mode Surveys Using Mail, Telephone, Interactive Voice Response (IVR) and the Internet
May 2008
The potential for improving response rates by changing from one mode of data collection to another mode and the consequences for measurement and nonresponse errors are examined. Data collection...
Provided by Reed Elsevier
-
White Papers
Yet Another Intrusion Detection System Against Insider Attacks
Jan 2008
Intrusion Detection System (IDS) originated as a mechanism for managing the detection of system misuse through the analysis of activity. Despite that the various attacks are occurred by insiders...
Provided by Information and Communications University
-
Podcasts
Defining IMS
Jan 2011
The speaker explores the IP Multimedia Subsystem, or IMS. He explains that IMS is set to become the framework that Internet Service Providers will use to deliver new, highly customizable services,...
Provided by F5 Networks
-
White Papers
On-Line Estimation of the QoE of Progressive Download Services in Multimedia Access Networks
May 2008
Current broadband access networks are evolving towards an infrastructure for multimedia services such as BroadcastTV, Voice over IP and Video on Demand. As these multimedia services have high...
Provided by Ghent University
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Podcasts
TechEd 2011 Birds-of-a-Feather (Session 12): Exchange Unified Messaging
May 2011
UM is a role often left out of the discussion, and when the hard questions do come up, engineers and consultants are often less prepared to answer them compared to other topics such as storage....
Provided by Microsoft
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White Papers
Use of Geographical Information System (GIS) in Developing an Intelligent Transport System (ITS)
Apr 2008
The purpose of this paper is to explore the possibilities of developing an Intelligent Transport System using the resources of Geographical Information System and Spatial Information System....
Provided by Chittagong University of Engineering & Technology
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White Papers
Discovering Structural Patterns in Telecommunications Data
Jan 2011
With the increasing amount and complexity of data being collected, there is an urgent need to create automated techniques for mining the data. In particular, data being generated and stored by...
Provided by American Association for Artificial Intelligence
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White Papers
Autonomus Reconfiguration Using FPAA for Bandwitdh Recovery in Satellite Subsystems
Jul 2008
In recent years, satellite communication has gained increased prominence and driving factors are the reliability, new design techniques and reduced cost. The onboard control system components of...
Provided by Vinayaka Mission University
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Case Studies
A Leading Telecom Equipment Company Relies on TCS to Support Its Legacy Network and Service Management Systems
Mar 2011
TCS' client, a leading supplier of high-tech equipment for telecommunications networks, turned to TCS for support in managing its legacy network and service management systems. Over the past...
Provided by Tata Consultancy Services
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White Papers
Camera Handoff With Adaptive Resource Management for Multi-Camera Multi-Target Surveillance
Apr 2008
Camera handoff is a crucial step to generate a continuously tracked and consistently labeled trajectory of the object of interest in multi-camera surveillance systems. Most existing camera handoff...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Efficient Proving for Practical Distributed Access-Control Systems
Jul 2009
The authors present a new technique for generating a formal proof that an access request satisfies access-control policy, for use in logic-based access-control frameworks. The approach is tailored...
Provided by Carnegie Mellon University
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White Papers
A User Study of Policy Creation in a Flexible Access-Control System
Apr 2008
Significant effort has been invested in developing expressive and flexible access-control languages and systems. However, little has been done to evaluate these systems in practical situations...
Provided by Association for Computing Machinery
-
Whitepapers
Resource Management in Satellite Communication Systems: Heuristic Schemes and Algorithms
May 2012
The high cost of frequency bandwidth in satellite communication emphasizes the need for good algorithms to cope with the resource allocation problem. In systems using DVB-S2 links, the...
Provided by Hindawi Publishing
-
Whitepapers
Design and Implementation of PCM Decommutator on a Single FPGA
Sep 2012
After frame synchronization, individual measurands are identified according to the frame location. The decommutator identifies and extracts Embedded Asynchronous Data Stream (EADS) words. Thus PCM...
Provided by International Journal of Advanced Research in Computer and Communication Engineering (IJARCCE)
-
Whitepapers
Applications of Spiro Helical Antenna in Satellite Communications
Aug 2012
A novel antenna made of a spiral wire wrapped into a larger helical shape is introduced. The geometry of this antenna, which is a doubly helical structure, is fully described by five independent...
Provided by Creative Commons
-
Whitepapers
A Survey of Classical Methods and New Trends in Pansharpening of Multispectral Images
Nov 2011
There exist a number of satellites on different earth observation platforms, which provide multispectral images together with a panchromatic image, that is, an image containing reflectance data...
Provided by EURASIP
-
Whitepapers
Innovative DAMA Algorithm for Multimedia DVB-RCS System
Jan 2013
Satellite is often used as an access network in the next generation networks landscape, where multimedia and real-time services are supported by return channels. However, these satellite return...
Provided by EURASIP
-
Whitepapers
Satellite Image Classification Using Fuzzy Rule Classifier
Nov 2012
The proposed technique is used to classify the satellite image into barren land, vegetation area, building area and road area. Initially, the satellite image is pre-processed and then is then...
Provided by EuroJournals
-
Whitepapers
The Power Budget of the Reception Signal for the Satellite Broadcast Service From Brazil to the Middle East and Europe
Jun 2012
Telecommunications companies operating of the direct broadcast satellite service is making maximum efforts to secure the transduction TV signal from the source to the recipients in the small...
Provided by EuroJournals
-
Whitepapers
Asymptotically Optimal Channel Feedback Protocol Design for Cognitive Multiple Access Channels
Nov 2012
In cognitive multiple access networks, primary secondary feedback links are needed to convey Secondary Transmitter Primary Base station (STPB) channel gains from the Primary Base Station (PBS) to...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
Very High Resolution Optical Satellites for DEM Generation: A Review
Feb 2011
The advent of Very High Resolution (VHR) optical satellites capable of producing stereo images led to a new era in extracting digital elevation model which commenced with the launch of IKONOS. The...
Provided by EuroJournals
-
Whitepapers
Simulation Based Analysis of RTT with PER, Buffer Size and Congestion Levels for Satellite Based Networks
Mar 2012
Round Trip Time values constitute one of the significant parameter available to a TCP sender for estimating the network conditions. The RTT has a significant effect on the throughput of a...
Provided by International Journal of Computer Applications
-
Whitepapers
Research on Objective Sorting Algorithm of Geo Communication Satellite Based on Fuzzy Theory
Jan 2013
GEO (Geostationary Earth Orbit) communication satellites are important guarantee for the war. The authors should research the sorting for attack if they want to win the war. Performance parameters...
Provided by ISSN
-
Whitepapers
Optimized Resource in Satellite Network Based on Genetic Algorithm
Dec 2012
Satellite network is an all-around network which has high-complexity, dynamic and enormous, and its resources are very limited. So, the authors have to optimize the resources on satellite network....
Provided by ISSN
-
Whitepapers
Yaw Phase Mode Attitude Control Using Z Wheel for LEO Microsatellite
Feb 2008
A control system is proposed for a low Earth orbit gravity gradient stabilized microsatellite using Z wheel. The microsatellite is 3-axis stabilized using a yaw reaction wheel with dual redundant...
Provided by WSDOT
-
Whitepapers
The System Transfering Between Laser-Satellites
Mar 2008
Laser inter-satellite communication is on the verge of becoming a reality. It will be a key building block for wide-area space data networks of the future. Design methodologies treating these as...
Provided by WSDOT
-
Whitepapers
Analytic Solution of Nadir Attitude Pointing for LEO Microsatellite
Apr 2008
A spacecraft in orbit always needs to stabilize the attitude against the external disturbance torques acting on it. Attitude control usually needs to be autonomous or semi-autonomous. On Alsat-1,...
Provided by WSDOT
-
Whitepapers
Markovian Chain Analysis in ALOHA for Satellite Applications
Sep 2008
The system with a lot of lightly loaded users can be optimized with a Random Multiple Access (RMA). In this kind of system, the transmission media is employed at the time the information is being...
Provided by NORTH ATLANTIC UNIVERSITY UNION
-
Whitepapers
Multiuser Detection Performance in Multibeam Satellite Links Under Imperfect CSI
Jan 2013
In multibeam satellite systems, there is a growing need for signal processing techniques able to mitigate the interference among beams, since they could enable a much more aggressive spectrum...
Provided by University of Vienna
-
Whitepapers
Performance Analysis of Multiuser Detection for Multibeam Satellites Under Rain Fading
Jul 2012
Multibeam satellite systems are nowadays widely employed, and their use is expected to grow in the next decades. This has raised the interest for signal processing techniques able to mitigate the...
Provided by University of Vienna
-
Whitepapers
Comparison of Post-Filtering Methods for Intelligibility Enhancement of Telephone Speech
Aug 2012
Post-filtering can be used to enhance the quality and intelligibility of speech in mobile phones. This paper introduces two straightforward post-filtering methods for near-end speech enhancement...
Provided by University of Heilongjiang
-
Whitepapers
Processing and Analysis of Satellite Images To Detect Vegetation
Mar 2012
Satellite images have many applications like meterology, agriculture, geology, forestry, landscape warfare etc. Interpretation and analysis of satellite imagery is conducted using specialized...
Provided by International Journal of Communications and Engineering
-
Whitepapers
Digital Video Broadcasting-Satellite to Handheld Services
Feb 2013
Universal education is the dream of India and more so with the passing of 'Right to Education bill' in the country. Looking to the diverse culture and vividity in the country it is not possible to...
Provided by International Journal of Innovations in Engineering and Technology (IJIET)
-
Whitepapers
Enhancement of Satellite Image Resolution With Moving Objects
Feb 2013
Satellite images are being used in many applications like Meteorology, Agriculture, Geology, Forestry, Landscape, Biodiversity, Planning, Education, Regional, Seismology and oceanography. The...
Provided by IOSR Journal of Engineering
-
Whitepapers
On Possible A-Priori "Imprinting" of General Relativity Itself on the Performed Lense-Thirring Tests with LAGEOS Satellites
Dec 2009
The term "GravitoMagnetism" (GM) denotes those gravitational phenomena concerning orbiting test particles, precessing gyroscopes, moving clocks and atoms and propagating electromagnetic waves...
Provided by Scientific Research
-
Whitepapers
An Approach for a Standard Polynomial for Cyclic Redundancy Check
Dec 2011
In this paper Cyclic Redundancy Check codes are implemented to detect the effectiveness of various types of errors that might occur during the transmission of data stream carrying message signal...
Provided by International Journal of Computer Applications
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Whitepapers
The Injection Velocity and Apogee Simulation for Transfer Elliptical Satellite Orbits
Mar 2012
Basic resources for communication satellites are communication radio-frequencies and satellite orbits. An orbit is the trajectory followed by the satellite. The communication between the satellite...
Provided by Scientific Research
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Whitepapers
The Range and Horizon Plane Simulation for Ground Stations of Low Earth Orbiting (LEO) Satellites
Sep 2011
Communication via satellite begins when the satellite is positioned in the desired orbital position. Ground stations can communicate with LEO (Low Earth Orbiting) satellites only when the...
Provided by Scientific Research
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Whitepapers
A New Method for Fast and Low Cost Handover in Leo Satellites
Jan 2012
Now-a-days LEO satellites have an important role in global communication system. They have some advantages over GEO & MEO satellites such as power requirement and end-to-end delay is lower and it...
Provided by International Journal of Computer Applications
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Whitepapers
The ANFIS System for Nonlinear Combined Forecasts in the Telecommunications Industry
Jan 2012
The Adaptive Network-Based Fuzzy Inference System (ANFIS) has been proven to be efficient for forecasting. To address this concern, this research develops a nonlinear combined forecasting system...
Provided by International Journal of Computer Applications
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Whitepapers
Rain Attenuation Impact on Performance of Satellite Ground Stations for Low Earth Orbiting (LEO) Satellites in Europe
Sep 2009
Low Earth Orbits (LEO) satellites are used for public communication and for scientific purposes. These satellites provide opportunities for investigations for which alternative techniques are...
Provided by Scientific Research
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White Papers
Yet Another Intrusion Detection System Against Insider Attacks
Jan 2008
Intrusion Detection System (IDS) originated as a mechanism for managing the detection of system misuse through the analysis of activity. Despite that the various attacks are occurred by insiders...
Provided by Information and Communications University
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White Papers
Response Rate and Measurement Differences in Mixed-Mode Surveys Using Mail, Telephone, Interactive Voice Response (IVR) and the Internet
May 2008
The potential for improving response rates by changing from one mode of data collection to another mode and the consequences for measurement and nonresponse errors are examined. Data collection...
Provided by Reed Elsevier
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White Papers
Network Controlled Joint Radio Resource Management for Heterogeneous Networks
Jan 2008
In this paper, the authors propose a way of achieving optimality in Radio Resource Management (RRM) for heterogeneous networks. They consider a micro or femto cell with two co-localized Radio...
Provided by Telecom ParisTech
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White Papers
Integrating Multiple and Heterogeneous Challenged Networks - Detailed Design and Experimental Evaluation Using Satellite Link -
Feb 2010
Motivated by the question of how to quickly transfer large-sized file if multiple and heterogeneous networks are available but each has insufficient performance for the requested task, the authors...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
PLATINE: DVB-S2/RCS Enhanced Testbed for Next Generation Satellite Networks
Jan 2009
Emulation is a cost effective and efficient tool to perform performances evaluation and innovative access and network techniques validation. Its ability to interconnect real equipments with real...
Provided by CNRS
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Case Studies
Memorial Hospital Case Study
Nov 2010
Memorial Hospital is a not-for-profit independent community hospital that serves the acute and primary care needs of more than 40,000 residents of Union County and five surrounding counties. The...
Provided by DigitalPersona
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Case Studies
Jackson Hospital Case Study
Jul 2010
Jackson Hospital is one of the largest not-for-profit community hospitals in Alabama. Jackson Hospital needed a solution that would meet these mandates, while providing a fast and convenient...
Provided by DigitalPersona
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White Papers
Performance Evaluation of Dynamic Spectrum Assignment and Access Technologies
Jul 2008
Implementing dynamic spectrum assignment and access technologies in heterogeneous wireless networks may lead to considerable improvement in spectrum usage and quality of service. In this paper the...
Provided by Institute of Electrical and Electronics Engineers
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Case Studies
How Cisco IT Trained Users for Migration to Global Voicemail System
Dec 2007
For some users, voice messaging is simply a way to capture missed phone calls, but for others it is a business-critical application. Major employee training was in order when Cisco began migration...
Provided by Cisco Systems
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Whitepapers
Information Extraction From Voicemail
Jan 2008
This paper addresses the problem of extracting key pieces of information from voicemail messages, such as the identity and phone number of the caller. This task differs from the named entity task...
Provided by IBM
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White Papers
Space-Based FPGA Radio Receiver Design
Sep 2010
Los Alamos has recently completed the latest in a series of Reconfigurable Software Radios, which incorporates several key innovations in both hardware design and algorithms. Due to the authors'...
Provided by Hindawi Publishing
