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satellite communications
(598 results)-
Whitepapers
Space exploration: From Mars to tourism to telescopes
Sep 2012
The Mars Curiosity rover may be grabbing headlines, but the realm of space is no longer the preserve of astronauts, robots and planetariums. Today, there is a new kind of space traveller: the...
Provided by ZDNet
-
Whitepapers
Network attached storage in the Public cloud
Sep 2012
Cloud computing represents a major transformation in the way enterprises deliver a wide array of IT services. The true potential of the cloud can only be tapped when both computing and storage are...
Provided by Red Hat AU
-
Case Studies
TCO Benchmarking Study
Feb 2012
Unified Communications (UC) represents the evolution of telephony, during which companies have augmented the traditional desk phone with other communications technologies. Buyers may have...
Provided by ShoreTel
-
White Papers
"TCP/IP Over Satellite: Optimization Vs. Acceleration"
Apr 2005
Both acceleration and optimization technologies help overcome satellite latency to varying degrees. Due to the nature of TCP transmissions, any performance increases achieved by the various...
Provided by End II End Communications
-
White Papers
Integrating Compression Into the TCP Stack, for Enhanced Performance in a Satellite Network
May 2009
Real-time, packet by packet compression was a standard feature in 1st and 2nd generation wireless networks. For these networks, air link resources were scarce and the additional CPU cost of...
Provided by Inmarsat
-
White Papers
MPEG-4 Network Migration: Solutions and Benefits
Mar 2008
MPEG-4 is a standard for video compression that allows network operators to dramatically improve digital video bandwidth utilization by roughly twice the comparable MPEG-2 industry benchmark for...
Provided by Motorola
-
White Papers
Troubleshoot Network Time Protocol
Nov 2008
This paper provides information on how to troubleshoot common problems with Network Time Protocol (NTP). Network Time Protocol (NTP) is widely used in order to synchronize a computer to Internet...
Provided by Cisco Systems
-
White Papers
Enabling IPTV: What's Needed in the Access Network
Apr 2008
Service providers around the globe have begun commercializing triple play services to better compete with cable and satellite operators. While this is helping boost Average Revenue Per User...
Provided by Alcatel-Lucent
-
White Papers
GPS/GPRS/GSM Based Mobile Asset Tracking
Jan 2009
Global Positioning Satellites (GPS) enable the tracking of all kinds of mobile assets accurately and provide their real time positions to the owners on a 24 by 7 basis over the GPRS/GSM link....
Provided by Calsoft Labs
-
White Papers
Markov Chain, Monte Carlo Global Search and Integration for Bayesian, GPS, Parameter Estimation
Apr 2009
Bayesian estimation techniques are applied to the problem of time and frequency offset estimation for Global Positioning System receivers. The estimation technique employs Markov Chain Monte Carlo...
Provided by University of New South Wales
-
White Papers
Simplified Filtering Estimator for Spacecraft Attitude Determination From Phase Information of GPS Signals
Jul 2009
This paper presents an implementation of a simplified filtering estimator for satellite attitude determination using GPS (Global Positioning System) signals. The non-linear system of estimator was...
Provided by International Association of Engineers
-
Whitepapers
Design of a Special Shaped Microstrip Antenna With Wide Band Characteristics
Apr 2012
Conformal antenna will play a vital role in near future in various applications such as high speed aircraft, missiles, airplanes, satellites etc. In this paper a special shaped conformal...
Provided by Serials Publiations
-
Whitepapers
A DTN routing scheme for quasi-deterministic networks with application to LEO satellites topology
Jul 2012
The authors propose a novel DTN routing algorithm, called DQN, specifically designed for quasi-deterministic networks with an application to satellite constellations. They describe that their...
Provided by Université de Toulouse
-
Whitepapers
Packet Scheduling Over DVB-S2 Through GSE Encapsulation
Oct 2008
Satellite digital video broadcasting is deeply changing : the next generation is dedicated to packet based communications and introduces fade mitigation techniques leading to variable throughput....
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Resource Management in Hybrid DVB-RCS and WiFi Networks
Oct 2008
Satellite networks are an attractive solution to provide broadband communication services anytime, anywhere with quality of service support. The aim of this paper is to study the integration of...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Optimizing TCP Performance Through Joint Channel Coding and Power Management in Power Constrained Satellite Networks
Oct 2008
In this paper an analytical framework is introduced for the optimization of TCP performance through joint channel coding and transmission power management in satellite communications, where both...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Attributes Definitions and Measurement Methods for MADM Based Sink Selection Controls in Satellite Sensor Networks
Oct 2008
The framework of the work is an Environmental Monitoring System (EMS) realized by a Satellite based Sensor Network (SSN). The paper introduces and formalizes specific performance metrics needed to...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Frame and Burst Acquisition in TDMA Satellite Communication Networks With Transponder Hopping
Jul 2009
The paper presents frame and burst acquisition in a satellite communication network based on Time Division Multiple Access (TDMA) in which the transmissions may be carried on different...
Provided by University of Nairobi
-
Case Studies
FSM Telecom, Micronesia: Providing Mobile Services to Remote Islands
Apr 2008
In a remote area of the Pacific Ocean lie the Federated States of Micronesia - 607 individual islands and atolls scattered over one million square miles, but with a total land area of only 271...
Provided by ADC
-
Whitepapers
Working Outside the Box: A Study of the Growing Momentum in Telework
Jan 2009
In practice, telework is a continuum, manifested in varying degrees. 'Telecommuters' are sometimes defined as employees who work neither at home nor at a central office, but at a satellite office...
Provided by IBM
-
Whitepapers
A Comparison Framework for MSSs
Oct 2008
Satellite networks can provide the possibility to access communication services on wide areas of the earth; this characteristic coupled with the support of user mobility allows satellite networks...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Satellite System Design Examples for Maximum MIMO Spectral Efficiency in LOS Channels
Oct 2008
MIMO satellite links have recently attracted a high interest with respect to possible link capacity enhancements. It has been shown that especially in Line-Of-Sight (LOS) satellite channels...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Architecture of a Satellite-Based Sensor Network for Environmental Observation
May 2008
Sensor webs are a promising technology for future earth science research because of its capability of adaptive observation from a network of in-situ and remote sensors. As important components of...
Provided by University of Southern California (Marshall)
-
Whitepapers
Analytical Framework for Performance Evaluation of Hybrid ARQ Schemes
Oct 2008
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...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Hierarchical Packet Scheduling for Satellite Multimedia Broadcasting: An Adaptive QoS-Aware Design
Oct 2008
With the unique broadcast nature and ubiquitous coverage of satellite network, the synergy between satellite and terrestrial networks provides new opportunities for delivering wideband services to...
Provided by Institute of Electrical & Electronic Engineers
-
Case Studies
Case Study - GPS at Disneyland
Jan 2010
Global Positioning System (GPS) receivers and radios are of immense use even at an unassuming place such as an amusement park. This case study discusses how a family with children visited...
Provided by Stone Foundation
-
Whitepapers
Efficient M-QAM Transmission Using Compacted Magnitude Modulation Tables
Oct 2008
Magnitude Modulation is a technique proposed with success for QPSK and OQPSK in order to maximize power and bandwidth of small satellite earth stations, by reducing PAPR of the modulated signal at...
Provided by Institute of Electrical & Electronic Engineers
-
Case Studies
Whole Foods Reduced Costs and Increased Performance and Manageability of Business-Critical Applications With Red Hat Solutions
Jun 2009
Founded in 1980 in Austin, Texas, Whole Foods Market (www.wholefoodsmarket.com) is a leader in the natural and organic foods industry and was America's first national certified organic grocer....
Provided by Red Hat
-
Case Studies
Union Bank Reinvents It Environment With Red Hat Enterprise Linux and Jboss Enterprise Middleware
Aug 2009
Union Bank, N.A., headquartered in San Francisco is a full-service commercial bank providing an array of financial services to individuals, small businesses, middle-market companies, and major...
Provided by Red Hat
-
Case Studies
Prorail Keeps Trains on the Right Track, Thanks to Red Hat
Nov 2008
ProRail manages the rail infrastructure in the Netherlands and is responsible for the Dutch railway network. ProRail wanted to maintain an uninterrupted rail service by realizing an uptime of 100...
Provided by Red Hat
-
Case Studies
Red Hat Enterprise Linux 5 With Virtualization Delivers Increased Performance to Dutch City Council
Jun 2009
The City of Rotterdam, known for its famous harbour and large city council, is located in the Netherlands and boasts over 600,000 inhabitants. The Rotterdam wanted to renew part of the city's IT...
Provided by Red Hat
-
Case Studies
Allianz Updates IT Infrastructure With Red Hat Enterprise Linux on IBM System Z and Jboss Enterprise Middleware
Aug 2009
Operating across Australia and New Zealand with approximately 3,300 staff, Allianz Australia Limited offers a wide range of insurance and risk management products. Rebuild Allianz's IT...
Provided by Red Hat
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Case Studies
Brazilian Paint Manufacturer, Tintas Iquine, Migrates From Unix to Red Hat Enterprise Linux to Increase Performance and Improve Security
Nov 2009
Tintas Iquine, a Brazilian paints, coatings, and special resins company, produces more than 1,500 products including; industrial paints, varnish, sealing, resins, pastes. Tintas Iquine wanted to...
Provided by Red Hat
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Case Studies
Verizon Communications Red Hat Innovation Award Winner Optimized Systems
Aug 2009
Verizon Communications Inc., a Dow 30 company, is a global leader in delivering broadband and other wireless and wire line communications services to mass market, business, government and...
Provided by Red Hat
-
Case Studies
Odyssey Logistics & Technology Migrates From Unix to Red Hat Enterprise Linux on Intel Xeon Based Servers to Run Mission-Critical Supply Chain Operations
May 2009
Odyssey Logistics & Technology provides global logistics management services to the chemical industry and other process manufacturers. OL&T needed to cost-effectively scale its infrastructure to...
Provided by Red Hat
-
Case Studies
Streamlining Systems Management: Red Hat Provides the University of Southern Mississippi With Time-Saving Solution
May 2009
The University of Mississippi, located in Hattiesburg, serves more than 14,000 students and 700 faculty members. Managing close to 80 physical servers with limited technical resources can quickly...
Provided by Red Hat
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Case Studies
Discount Tire Accelerates Its e-Commerce Business With Red Hat Satellite and IBM
Jun 2009
Discount Tire, the world's largest independent tire and wheel retailer has displayed tenacity and a can-do attitude from the day it opened its doors. Discount Tire Company wanted to support the...
Provided by Red Hat
-
Case Studies
SPH Search Selects Red Hat Solutions for Reliability and Security to Scale Search Engine's Business Growth
Mar 2009
SPH Search is collaboration between two media powerhouses - Singapore Press Holdings Group (SPH) and Schibsted Group. SPH Search wanted to quickly occupy and dominate the empty space between the...
Provided by Red Hat
-
Case Studies
Red Hat Virtualization Delivers Cost Savings and Increased Performance for University of Sydney
Mar 2009
Founded in 1850, the University of Sydney became the first university established in Australia. The University of Sydney wanted A Quick and cost-effectively develops a high-availability platform...
Provided by Red Hat
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Case Studies
Red Hat's Technical Account Management (TAM) Service Helps Autotrader.com Make Smooth Transition to SOA
Feb 2009
AutoTrader.com was launched in 1998 and over the past 10 years has grown into the Internet's leading marketplace and information portal for automotive products and services. The firm wanted to...
Provided by Red Hat
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Whitepapers
Network-Attached Storage in the Public Cloud
Jan 2013
In this paper, after reviewing the key requirements for an enterprise-grade cloud storage system, we introduce Red Hat Storage Server and review the architectural characteristics that make it the...
Provided by Red Hat
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Whitepapers
Sensor-Network Based Intelligent Water Quality Monitoring and Control
Apr 2013
Water quality monitoring has become a crucial question around the whole world. Traditionally, remote water sensing based on satellites is widely used to monitor the water quality for rivers,...
Provided by International Journal of Advanced Research in Computer Engineering & Technology
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Whitepapers
Comparative Analysis of Various Methods for Preprocessing of Satellite Imagery
Mar 2013
A new piecewise polynomial correction method based on the nonlinear variability of distortions in different imaging angles has been discussed in Chunyuan WANG et al. The images obtained by remote...
Provided by International Journal of Engineering and Technology
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Whitepapers
GPS Signal Acquisition via Compressive Multichannel Sampling
Sep 2011
In this paper, the authors propose an efficient acquisition scheme for GPS receivers. It is shown that GPS signals can be effectively sampled and detected using a bank of randomized correlators...
Provided by Reed Business Information
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Whitepapers
Broadband Satellite Networks: Standards, Cross-Layer Design, and QoS Improvement
Feb 2013
A review of broadband satellite communication networks scenario, standards on broadband satellite networks and the main specifications of standards are provided. Due to the performance of current...
Provided by Journal of Theoretical and Applied Information Technology
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Whitepapers
A Dynamic On-Demand Multipath Routing Algorithm for Low Earth Orbit Satellite Networks
Jan 2013
Compared with GEostationary Orbit (GEO) satellite systems and Medium Earth Orbit (MEO) satellite systems, Low Earth Orbit (LEO) satellite systems provide lower propagation delay as well as higher...
Provided by Journal of Theoretical and Applied Information Technology
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Whitepapers
Channel Coding Simulation Research of Inter-Satellite Spread Spectrum Communication System
Jan 2013
In this paper, the authors consider proposing the mathematical model and simulation mode of inter-satellite channel based on the reliability of inter-satellite communication system. The Monte...
Provided by Journal of Theoretical and Applied Information Technology
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Whitepapers
Improving the Atmospheric Delay Effects on the Received Global Positioning System Signals
Oct 2012
There are several error sources that cause the estimated position and time measuring from Global Positioning System (GPS) receivers to be inaccurate. The most significant error sources are the...
Provided by International forum of researchers Students and Academician
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Whitepapers
Intelligent Weather Systems with Fuzzy Logic Controller for Satellite Networks
Mar 2008
Weather attenuations can have a distorting effect on signal fidelity above 10 GHz that lead to excessive digital transmission error. This loss of signal is commonly referred to as signal...
Provided by Institute of Electrical and Electronics Engineers
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Whitepapers
A Study on the Separation Distance for Frequency Sharing between GSO Network and Terrestrial Network in Ka Band
Apr 2008
Co-existence of various wireless systems may cause frequency interference problems. For this reason, frequency sharing studies play a very important role in order to use limited spectrum resources...
Provided by Chonbuk National University
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Whitepapers
Design of Rate Constrained Multi-user Receivers for Satellite Communications
Apr 2008
In the realm of satellite communications, one of the great impairments to increase the spectral efficiency is multi-user interference in the reverse link (mobile to satellite). Standards...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
Link Layer Coding for DVB-S2 Interactive Satellite Services to Trains
Apr 2008
The railroad satellite channel is characterized by frequent signal outages due to tunnels, bridges and electrical trellises. While for medium/long tunnels the main option to offer reliable and...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
Robust Transmission of Compressed Streams over Land Mobile Satellite Channel at Ku-Band
Apr 2008
In this paper, the authors present a general framework for the efficient and robust transmission of compressed streams over Land Mobile Satellite (LMS) channel at Ku-Band. Due to the extensive use...
Provided by University of Cadiz
-
Whitepapers
Transport Layer Coding for Satellite-Based Audio and Multimedia Services to Vehicular Terminals in Ku-band
Apr 2008
Satellite radio for vehicles is normally hampered by the problem of the shadowing of the line-of-sight between satellite and receiver. One possible way to overcome this challenge is to provide a...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
Proportional Channel-aware Packet Scheduling in Satellite Multimedia Broadcasting
Apr 2008
In this paper, the authors study the optimization techniques for scheduling multimedia packets in satellite digital multimedia broadcasting system, namely SDMB, in the presence of a return link...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
A Mesh Network over a Semi-Transparent Satellite
Oct 2011
In the satellite communications component of the future Internet, Peer-To-Peer mesh connectivity of satellite terminals is an impellent necessity. In particular, delay sensitive applications such...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
On the Application of the Baum-Welch Algorithm for Modeling the Land Mobile Satellite Channel
Oct 2011
Accurate channel models are of high importance for the design of upcoming mobile satellite systems. Now-a-days most of the models for the Land Mobile Satellite Channel (LMSC) are based on Markov...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
Development of Evolved Mobile Satellite Communications System; WIDESTAR II
Oct 2011
In April 2010, NTT DOCOMO began WIDESTAR II, Mobile Satellite communications Service (MSS) covering all of the Japan landmass and the surrounding maritime area. WIDESATR II is the next stage in...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
Power Adaptation for DVB Multiple Access Channel with Raptor Code
Oct 2011
In this paper, the authors propose a scheme for increasing the capacity of forward and/or return links of the Digital Video Broadcasting Return Channel via Satellite (DVB-RCS). The increase of the...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
BICM-OFDM Based Spectrally Efficient SDF Relaying for Satellite Broadcast Networks
Oct 2011
In this paper, the authors present a spectrally efficient relaying scheme for satellite broadcast networks with BICM-OFDM air interface. Two Selective Decode-and-Forward (SDF) relaying Mobile...
Provided by Institute of Electrical and Electronics Engineers
-
Whitepapers
Larg Band Ridged Waveguide Polarizer as Feed for Telecommunications Satellites Antennas
Mar 2013
For the transmission in high power in the systems of telecommunications Satellite; the systems in technology guides wave are best placed. The current progress recorded in the field of...
Provided by International Journal of Computer Science Issues
-
Whitepapers
Routing Decisions Independent of Queuing Delays in Broadband LEO Networks
Oct 2009
In this paper, the authors present an analysis of queuing and propagation delays of Inter-Satellite Links (ISLs) in broadband Low-Earth Orbit (LEO) satellite networks. It is shown that queuing...
Provided by Gdansk University of Technology
-
Whitepapers
A Study of Adaptive Equalizer for APSK in the Advanced Satellite Broadcasting System
Oct 2009
By making use of LDPC codes and a smaller roll-off factor, the advanced satellite broadcasting system proposed by the authors has a 30% higher transmission channel capacity in comparison with the...
Provided by University of South Florida
-
Whitepapers
Analysis of Uncoordinated ISL Networks
Oct 2009
In this paper, the authors consider the potential for communication within a group of independent low earth orbit satellites which are not members of a structured constellation. They assume...
Provided by University of South Alabama
-
Whitepapers
A Horn Antenna Design With Novel Waveguide Polarizer for Mobile Satellite Communications Applications
Aug 2009
Conventional polarizers usually include complicated corrugations and lossy insertions such as an iris, septa and dielectric slab, causing performance degradation and fabrication difficulties. At...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Parametric Study of Roof Geometry and Roof Rack Crossbar Effects on the Performance of Multi-Band Vehicle Antennas
Aug 2009
Recent production vehicles have shown a growing trend of incorporating multiple antennas in a single module, which include various antennas such as GPS and Satellite Digital Audio Radio System...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A Novel Extended Tracking Range DLL for AltBOC Signals
Aug 2009
Code tracking linear range and the code phase tracking jitter have always been opposing ends of the design criteria of a code lock loop in direct-sequence spread-spectrum communication systems....
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Reference Measurement Platforms for Satellite Based Localisation in Ground Transportation
Aug 2009
For the introduction of satellite based localisation regarding safety related applications in transportation, the knowledge on the accuracy of the localisation system as well as its availability...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Adaptive Multi-Carrier Demodulator for Variable Polarization Frequency Division Multiplexing
Aug 2009
This paper proposes a new Variable Polarization Frequency Division Multiplexing (VPFDM) demodulator for Ku broadband mobile satellite communications. VPFDM allows each user to utilize...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Double Layer Space-Time Block Code for Hybrid Satellite-Terrestrial Broadcasting Systems
Aug 2009
Multiple Input Multiple Output (MIMO) is a topic of high interest for the next generation of broadcasting systems. However, their deployment in Single Frequency Networks (SFN) becomes more...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Performance of Free-Space Optical Communication with Feed Forward Compensation Model
Mar 2013
Free-space optical communication offers an attractive alternative for transferring high-bandwidth data over RF (Radio Frequency) signals. However, satellite vibration is the major pointing error....
Provided by International Journal of Computer Applications
-
Whitepapers
Integrated Campus Management System Using Cloud Computing - A Case Study of Guru Nanak Dev University
Mar 2013
Cloud computing has become a momentous technological trend in recent years, and many experts presage that cloud computing could reshape Information Technology (IT) processes and its current...
Provided by International Journal of Computer Applications
-
Whitepapers
Flexible Bandwidth Allocation Scheme Based on Traffic Demands and Channel Conditions for Multi-Beam Satellite Systems
Mar 2012
Multi-beam satellite networks can extend the service coverage as deploying the spot beams. It is important to allocate the appropriate resources to multi-beam downlinks to prevent the unnecessary...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A Handover Management in LEO Satellite Network Using Angular and Distance Based Algorithm
Oct 2011
In satellite communication networks, low propagation delay and power requirements increase the plausibility of Low Earth Orbit (LEO) satellites over Geostationary Earth Orbit (GEO) satellites....
Provided by International Journal of Computer Applications
-
Whitepapers
Reduce Delays in End to End DVB-RCS Satellite Networks
Mar 2012
In today's satellite network to a return-channel for communication between terminals used in the DVB-RCS standard is provided by this feature. In order to allocate the bandwidth of the standard...
Provided by JCAKSRCE
-
Whitepapers
A New Automatic Road Extraction Technique using Gradient Operation and Skeletal Ray Formation
Sep 2011
The usage of satellite images and extracting road from the imagery becomes very significant in the services related to road transportation such as maintenance, creation and so on. The literature...
Provided by International Journal of Computer Applications
-
Whitepapers
A New Dynamic Reservation Protocol for Many-to-One Multi-Access With Long Propagation Delay
Aug 2012
Reservation multi-access protocol is a natural choice in wireless networks with high inter-nodal propagation delay and sporadic communications. There have been some proposals in delay-intensive...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Computationally Efficient PAPR Reduction Schemes in OFDM-Based Satellite Communication Systems
Aug 2012
Due to the nonlinear characteristics of the High Power Amplifier (HPA), the employment of Orthogonal Frequency Division Multiplexing (OFDM) based modulation schemes results in significant...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A New PWL Approximation for The "Self-Adjustable Offset Min-Sum" Decoding with a Highly Reduced-Complexity
Jan 2013
Low-Density Parity-Check (LDPC) code is an Error Correcting Code (ECC) which is used in high throughput applications such the Digital Video Broadcasting for the second generation digital satellite...
Provided by International Journal of Computer Applications
-
Whitepapers
Effect of Satellite System Impairments on a Multilevel Coding System for Satellite Broadcasting
Apr 2011
In this paper, the authors evaluate a Multi-Level Coding (MLC) scheme with Multi-Stage Decoding (MSD) designed for satellite broadcasting communications. The impact of three different satellite...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
MPEG-4 Network Migration: Solutions and Benefits
Mar 2008
MPEG-4 is a standard for video compression that allows network operators to dramatically improve digital video bandwidth utilization by roughly twice the comparable MPEG-2 industry benchmark for...
Provided by Motorola
-
White Papers
Troubleshoot Network Time Protocol
Nov 2008
This paper provides information on how to troubleshoot common problems with Network Time Protocol (NTP). Network Time Protocol (NTP) is widely used in order to synchronize a computer to Internet...
Provided by Cisco Systems
-
White Papers
Enabling IPTV: What's Needed in the Access Network
Apr 2008
Service providers around the globe have begun commercializing triple play services to better compete with cable and satellite operators. While this is helping boost Average Revenue Per User...
Provided by Alcatel-Lucent
-
White Papers
GPS/GPRS/GSM Based Mobile Asset Tracking
Jan 2009
Global Positioning Satellites (GPS) enable the tracking of all kinds of mobile assets accurately and provide their real time positions to the owners on a 24 by 7 basis over the GPRS/GSM link....
Provided by Calsoft Labs
-
White Papers
Markov Chain, Monte Carlo Global Search and Integration for Bayesian, GPS, Parameter Estimation
Apr 2009
Bayesian estimation techniques are applied to the problem of time and frequency offset estimation for Global Positioning System receivers. The estimation technique employs Markov Chain Monte Carlo...
Provided by University of New South Wales
-
White Papers
Simplified Filtering Estimator for Spacecraft Attitude Determination From Phase Information of GPS Signals
Jul 2009
This paper presents an implementation of a simplified filtering estimator for satellite attitude determination using GPS (Global Positioning System) signals. The non-linear system of estimator was...
Provided by International Association of Engineers
-
Whitepapers
Design of a Special Shaped Microstrip Antenna With Wide Band Characteristics
Apr 2012
Conformal antenna will play a vital role in near future in various applications such as high speed aircraft, missiles, airplanes, satellites etc. In this paper a special shaped conformal...
Provided by Serials Publiations
-
Whitepapers
A DTN routing scheme for quasi-deterministic networks with application to LEO satellites topology
Jul 2012
The authors propose a novel DTN routing algorithm, called DQN, specifically designed for quasi-deterministic networks with an application to satellite constellations. They describe that their...
Provided by Université de Toulouse
-
Whitepapers
Packet Scheduling Over DVB-S2 Through GSE Encapsulation
Oct 2008
Satellite digital video broadcasting is deeply changing : the next generation is dedicated to packet based communications and introduces fade mitigation techniques leading to variable throughput....
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Resource Management in Hybrid DVB-RCS and WiFi Networks
Oct 2008
Satellite networks are an attractive solution to provide broadband communication services anytime, anywhere with quality of service support. The aim of this paper is to study the integration of...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Optimizing TCP Performance Through Joint Channel Coding and Power Management in Power Constrained Satellite Networks
Oct 2008
In this paper an analytical framework is introduced for the optimization of TCP performance through joint channel coding and transmission power management in satellite communications, where both...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Attributes Definitions and Measurement Methods for MADM Based Sink Selection Controls in Satellite Sensor Networks
Oct 2008
The framework of the work is an Environmental Monitoring System (EMS) realized by a Satellite based Sensor Network (SSN). The paper introduces and formalizes specific performance metrics needed to...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Frame and Burst Acquisition in TDMA Satellite Communication Networks With Transponder Hopping
Jul 2009
The paper presents frame and burst acquisition in a satellite communication network based on Time Division Multiple Access (TDMA) in which the transmissions may be carried on different...
Provided by University of Nairobi
-
Case Studies
FSM Telecom, Micronesia: Providing Mobile Services to Remote Islands
Apr 2008
In a remote area of the Pacific Ocean lie the Federated States of Micronesia - 607 individual islands and atolls scattered over one million square miles, but with a total land area of only 271...
Provided by ADC
-
Whitepapers
Working Outside the Box: A Study of the Growing Momentum in Telework
Jan 2009
In practice, telework is a continuum, manifested in varying degrees. 'Telecommuters' are sometimes defined as employees who work neither at home nor at a central office, but at a satellite office...
Provided by IBM
-
Whitepapers
A Comparison Framework for MSSs
Oct 2008
Satellite networks can provide the possibility to access communication services on wide areas of the earth; this characteristic coupled with the support of user mobility allows satellite networks...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Satellite System Design Examples for Maximum MIMO Spectral Efficiency in LOS Channels
Oct 2008
MIMO satellite links have recently attracted a high interest with respect to possible link capacity enhancements. It has been shown that especially in Line-Of-Sight (LOS) satellite channels...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Architecture of a Satellite-Based Sensor Network for Environmental Observation
May 2008
Sensor webs are a promising technology for future earth science research because of its capability of adaptive observation from a network of in-situ and remote sensors. As important components of...
Provided by University of Southern California (Marshall)
-
Whitepapers
Analytical Framework for Performance Evaluation of Hybrid ARQ Schemes
Oct 2008
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...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Hierarchical Packet Scheduling for Satellite Multimedia Broadcasting: An Adaptive QoS-Aware Design
Oct 2008
With the unique broadcast nature and ubiquitous coverage of satellite network, the synergy between satellite and terrestrial networks provides new opportunities for delivering wideband services to...
Provided by Institute of Electrical & Electronic Engineers
-
Case Studies
Case Study - GPS at Disneyland
Jan 2010
Global Positioning System (GPS) receivers and radios are of immense use even at an unassuming place such as an amusement park. This case study discusses how a family with children visited...
Provided by Stone Foundation
-
Whitepapers
Space exploration: From Mars to tourism to telescopes
Sep 2012
The Mars Curiosity rover may be grabbing headlines, but the realm of space is no longer the preserve of astronauts, robots and planetariums. Today, there is a new kind of space traveller: the...
Provided by ZDNet
-
Whitepapers
Efficient M-QAM Transmission Using Compacted Magnitude Modulation Tables
Oct 2008
Magnitude Modulation is a technique proposed with success for QPSK and OQPSK in order to maximize power and bandwidth of small satellite earth stations, by reducing PAPR of the modulated signal at...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Integrating Compression Into the TCP Stack, for Enhanced Performance in a Satellite Network
May 2009
Real-time, packet by packet compression was a standard feature in 1st and 2nd generation wireless networks. For these networks, air link resources were scarce and the additional CPU cost of...
Provided by Inmarsat
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Case Studies
Whole Foods Reduced Costs and Increased Performance and Manageability of Business-Critical Applications With Red Hat Solutions
Jun 2009
Founded in 1980 in Austin, Texas, Whole Foods Market (www.wholefoodsmarket.com) is a leader in the natural and organic foods industry and was America's first national certified organic grocer....
Provided by Red Hat
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Case Studies
Union Bank Reinvents It Environment With Red Hat Enterprise Linux and Jboss Enterprise Middleware
Aug 2009
Union Bank, N.A., headquartered in San Francisco is a full-service commercial bank providing an array of financial services to individuals, small businesses, middle-market companies, and major...
Provided by Red Hat
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Case Studies
Prorail Keeps Trains on the Right Track, Thanks to Red Hat
Nov 2008
ProRail manages the rail infrastructure in the Netherlands and is responsible for the Dutch railway network. ProRail wanted to maintain an uninterrupted rail service by realizing an uptime of 100...
Provided by Red Hat
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Case Studies
Red Hat Enterprise Linux 5 With Virtualization Delivers Increased Performance to Dutch City Council
Jun 2009
The City of Rotterdam, known for its famous harbour and large city council, is located in the Netherlands and boasts over 600,000 inhabitants. The Rotterdam wanted to renew part of the city's IT...
Provided by Red Hat
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Case Studies
Allianz Updates IT Infrastructure With Red Hat Enterprise Linux on IBM System Z and Jboss Enterprise Middleware
Aug 2009
Operating across Australia and New Zealand with approximately 3,300 staff, Allianz Australia Limited offers a wide range of insurance and risk management products. Rebuild Allianz's IT...
Provided by Red Hat
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Case Studies
Brazilian Paint Manufacturer, Tintas Iquine, Migrates From Unix to Red Hat Enterprise Linux to Increase Performance and Improve Security
Nov 2009
Tintas Iquine, a Brazilian paints, coatings, and special resins company, produces more than 1,500 products including; industrial paints, varnish, sealing, resins, pastes. Tintas Iquine wanted to...
Provided by Red Hat
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Case Studies
Verizon Communications Red Hat Innovation Award Winner Optimized Systems
Aug 2009
Verizon Communications Inc., a Dow 30 company, is a global leader in delivering broadband and other wireless and wire line communications services to mass market, business, government and...
Provided by Red Hat
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Case Studies
Odyssey Logistics & Technology Migrates From Unix to Red Hat Enterprise Linux on Intel Xeon Based Servers to Run Mission-Critical Supply Chain Operations
May 2009
Odyssey Logistics & Technology provides global logistics management services to the chemical industry and other process manufacturers. OL&T needed to cost-effectively scale its infrastructure to...
Provided by Red Hat
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Case Studies
Streamlining Systems Management: Red Hat Provides the University of Southern Mississippi With Time-Saving Solution
May 2009
The University of Mississippi, located in Hattiesburg, serves more than 14,000 students and 700 faculty members. Managing close to 80 physical servers with limited technical resources can quickly...
Provided by Red Hat
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Case Studies
Discount Tire Accelerates Its e-Commerce Business With Red Hat Satellite and IBM
Jun 2009
Discount Tire, the world's largest independent tire and wheel retailer has displayed tenacity and a can-do attitude from the day it opened its doors. Discount Tire Company wanted to support the...
Provided by Red Hat
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Case Studies
SPH Search Selects Red Hat Solutions for Reliability and Security to Scale Search Engine's Business Growth
Mar 2009
SPH Search is collaboration between two media powerhouses - Singapore Press Holdings Group (SPH) and Schibsted Group. SPH Search wanted to quickly occupy and dominate the empty space between the...
Provided by Red Hat
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Case Studies
Red Hat Virtualization Delivers Cost Savings and Increased Performance for University of Sydney
Mar 2009
Founded in 1850, the University of Sydney became the first university established in Australia. The University of Sydney wanted A Quick and cost-effectively develops a high-availability platform...
Provided by Red Hat
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Case Studies
Red Hat's Technical Account Management (TAM) Service Helps Autotrader.com Make Smooth Transition to SOA
Feb 2009
AutoTrader.com was launched in 1998 and over the past 10 years has grown into the Internet's leading marketplace and information portal for automotive products and services. The firm wanted to...
Provided by Red Hat
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Case Studies
Red Hat Helps Tribune Interactive Slash Costs and Reduce Time to Market
Jan 2009
As the largest employee-owned media firm in the United States, the Chicago-based Tribune Company operates a broad range of businesses in the print publishing. Media firm wanted to reduce costs and...
Provided by Red Hat
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Case Studies
Red Hat Virtualization and Jboss Help Quam Limited Build Flexible, High-Performance Information Portal
Feb 2009
Quam Limited serves both institutional and retail investors and provides an array of services supporting participation in capital markets and wealth management. The Quam Limited wanted rapid...
Provided by Red Hat
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Case Studies
European Real Estate Listing Company Slashes Energy Use and Operating Costs With Red Hat Virtualization
Jan 2009
ImmobilienScout24.de is one of the most successful real estate listing companies in Europe. ImmobilienScout24.de wanted to dramatically reduce energy use and operating costs while improving...
Provided by Red Hat
