- Subscribe to this page:
- RSS
- Email Alert
telecommunications
(231 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.
-
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
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
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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)
-
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)
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
White Papers
Nonlinear Equalization With Known Channel State Information in Satellite Communication
Nov 2008
Three nonlinear equalization algorithms are discussed for the case that training sequence is not available but Channel State Information (CSI) is known. The first algorithm is based on the...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Evaluation of Power Line Communication Equipment in Home Networks
Sep 2009
In this paper, the authors examine the performance of power line communication equipments (ethernet -to-powerline adapters) that come from different vendors and are based on different technologies...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Design and Simulation of a Reduced - Size VSAT Antenna With Appreciable Gain
Dec 2011
Information technology has become a very vital tool in the world today. There exist the need for the flow of information between arms of an organization such as banks, hospitals, business sectors...
Provided by ARPN Journal of Systems and Software
-
White Papers
A Queuing Model for Congestion Control and Reliable Data Transfer in Cable Access Networks
Jul 2011
A set of simple queuing theory models which can model the average response of a network of computers to a given traffic load has been implemented. The impact of variations in traffic patterns and...
Provided by International Journal of Computer Science and Information Technologies
-
White Papers
Real Time Telecom Revenue Assurance
Apr 2012
Telecommunication industry has seen phenomenal growth and intense competition in recent times. Basic connectivity has been commoditized and service providers need to provide personalized and...
Provided by IARIA
-
White Papers
Performance Modeling of Database Servers in a Telecommunication Service Management System
Apr 2012
Resource optimization mechanisms, as admission control and traffic management, require accurate performance models that capture the dynamics of the system during high loads. The main objective of...
Provided by IARIA
-
White Papers
Modeling Unified Interaction for Communication Service Integration
Jul 2011
Social network inspired communication services has made tremendous success, allowing users to communicate and share user generated contents in an efficient way. At the same time, Telecom services...
Provided by IARIA
-
White Papers
Towards Semantic Interoperability of Graphical Domain Specific Modeling Languages for Telecommunications Service Design
Jul 2011
High competition pressures Telecommunications service providers to reduce their concept-to-market time. To manage more easily service complexity among several actors in the design process and to...
Provided by IARIA
-
White Papers
A Cross-Layer Rate Control Mechanism for Link-Adaptive Satellite Integrated Services
Oct 2007
This paper presents a mechanism for dynamic rate control of satellite integrated services, based on a cross-layer approach, utilising link quality feedback from the satellite terminals. The...
Provided by Hindawi Publishing
-
White Papers
Research on Satellite Autonomous Orbit Determination Method Based on the Unscented Particle Filter with Embedded Earth Sensor Correction
May 2012
The direct earth horizon and starlight observation with earth sensor and star sensor is often used in the satellite autonomous orbit determination, which is a stable autonomous navigation method...
Provided by AICIT
-
White Papers
Integrate Research on Fuzzy Comprehensive Evaluation of the Satellite Engineering Project
May 2012
Risk management of satellite engineering project is a very complex job, and risk evaluation is one of the most important links. By predicting and classifying risk sources of a satellite...
Provided by AICIT
-
White Papers
The Local Circle Removal Algorithm for the LDPC Code in Communications
May 2012
The LDPC code, whose check matrix H is sparse, is widely utilized in the current communication systems due to its good performance that is near the Shannon limit. The girth length, which is the...
Provided by AICIT
-
Whitepapers
Eigenbeamforming for Interference Mitigation in GNSS Receivers
May 2011
This paper presents a novel beamforming approach for interference mitigation in Global Navigation Satellite Systems (GNSS) receivers. The proposed algorithm is based on a recently developed...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
-
Whitepapers
First-Order Elastic Nonlinearities of Bulk Acoustic Wave Resonators
Jan 2011
The authors propose a procedure to characterize the intrinsic nonlinearities of bulk acoustic wave resonators by performing one-port measurements of the second harmonic and second-order...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
DAVINCI Non-Binary LDPC Codes: Performance and Complexity Assessment
Mar 2010
Non-Binary Low Density Parity Check (NB-LDPC) codes are expected to reduce the performance gap between binary LDPC and Turbo Codes for both short and medium length codewords, retaining in both...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
-
Whitepapers
Call/Messaging Open API for Telecommunication Services
Feb 2008
With the saturation of existing intelligent network services, it is becoming increasingly difficult to develop new profitable services. The current trend seems to be moving toward the convergence...
Provided by KT
-
Whitepapers
New Correlation Functions for CBOC Satellite Signal Synchronization
Feb 2008
Binary Offset Carrier (BOC) signal synchronization is based on the correlation between the received and locally generated BOC signals. Thus, the multiple side-peaks in BOC autocorrelation are one...
Provided by Sungkyunkwan University
-
Whitepapers
A New Approach for the Construction of Powerful LDPC Convolutional Codes
Apr 2008
A novel approach for the algebraic construction of Low-Density Parity-Check (LDPC) convolutional codes is presented. It is based on the orthogonality structures of the codes. The proposed code...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Effects of Access-Control Policy Conflict-Resolution Methods on Policy-Authoring Usability
Mar 2009
Access-control policies can be stated more succinctly if they support both rules that grant access and rules that deny access, but this introduces the possibility that multiple rules will give...
Provided by Carnegie Mellon University
-
White Papers
Reliability and Cost Reduction of Solar Arrays for GEO Satellites
Sep 2008
Power delivery over the mission life is critical to all satellites; therefore solar arrays must be reliable and live up to predicted on-orbit performance. Space satellite insurance claims were...
Provided by Auburn University
-
White Papers
The Internet Ecosystem - The Potential for Discrimination
Mar 2010
The Federal Communication Commission is considering rules enforcing "Network neutrality" and legislation proposing similar goals have been discussed in Congress. The goals of the proposed...
Provided by University of Colorado
-
White Papers
Achievable Outage Rates With Improved Decoding of Bicm Multiband OFDMA Under Channel Estimation Errors
Aug 2007
The authors consider the decoding of Bit Interleaved Coded Modulation (BICM) applied to multiband OFDM for practical scenarios where only a noisy (possibly very bad) estimate of the channel is...
Provided by CNRS
-
White Papers
Application of a Design Space Exploration Tool to Enhance Interleaver Generation
Jun 2007
This paper presents a methodology to efficiently explore the design space of communication adapters. In most Digital Signal Processing (DSP) applications, the overall performance of the system is...
Provided by STMicroelectronics
-
White Papers
Application of DAC Codeword Spectrum: Expansion Factor
Oct 2010
Distributed Arithmetic Coding (DAC) proves to be an effective implementation of Slepian-Wolf Coding (SWC), especially for short data blocks. To study the property of DAC codewords, the author has...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Channel Estimation and Multiuser Detection in Asynchronous Satellite Communications
Nov 2010
In this paper, the authors propose a new method of channel estimation for asynchronous additive white Gaussian noise channels in satellite communications. This method is based on signals...
Provided by University of Carthage
-
White Papers
Evolutionary Game and Learning for Dynamic Spectrum Access
Mar 2011
Efficient dynamic spectrum access mechanism is crucial for improving the spectrum utilization. In this paper, the authors consider the dynamic spectrum access mechanism design with both complete...
Provided by Chinese University of Hong Kong
-
White Papers
Algebraic Hybrid Satellite-Terrestrial Space-Time Codes for Digital Broadcasting in SFN
Mar 2011
Lately, different methods for broadcasting future digital TV in a Single Frequency Network (SFN) have been under an intensive study. To improve the transmission to also cover suburban and rural...
Provided by University of Turku
-
White Papers
GLRT-Based Spectrum Sensing With Blindly Learned Feature Under Rank-1 Assumption
Mar 2011
Prior knowledge can improve the performance of spectrum sensing. Instead of using universal features as prior knowledge, the authors propose to blindly learn the localized feature at the secondary...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Spectrum Sensing Based on Blindly Learned Signal Feature
Feb 2011
Spectrum sensing is the major challenge in the Cognitive Radio (CR). The authors propose to learn local feature and use it as the prior knowledge to improve the detection performance. They define...
Provided by Tennessee Technological University
-
White Papers
Spectrum Management for Cognitive Radio Based on Genetics Algorithm
Jan 2011
Spectrum scarceness is one of the major challenges that the present world is facing. The efficient use of existing licensed spectrum is becoming most critical as growing demand of the radio...
Provided by Gyan Vihar Universe
-
White Papers
Communication in a Poisson Field of Interferers - Part II: Channel Capacity and Interference Spectrum
Jan 2010
In their previous paper, the authors presented a mathematical model for communication subject to both network interference and noise, where the interferers are scattered according to a spatial...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Criticality Aware Access Control Model for Pervasive Applications
Jan 2011
Access control policies define the rules for accessing system resources. Traditionally, these are designed to take a reactive view for providing access, based on explicit user request. This...
Provided by Arizona State University
-
White Papers
A Meeting Detector and Its Applications
Jan 2011
In this paper the authors present a context-sensing component that recognizes meetings in a typical office environment. The prototype detects the meeting start and end by combining outputs from...
Provided by Dartmouth College
-
White Papers
Usage Control: A Vision for Next Generation Access Control
Jan 2011
The term Usage Control (UCON) is a generalization of access control to cover obligations, conditions, continuity (Ongoing controls) and mutability. Traditionally, access control has dealt only...
Provided by George Mason University
-
White Papers
A Smart Sensor Web for Ocean Observation: Integrated Acoustics, Satellite Networking, and Predictive Modeling
May 2008
In many areas of Earth science, including climate change research, there is a need for near real-time integration of data from heterogeneous and spatially distributed sensors, in particular...
Provided by University of Washington
-
White Papers
Delay/Disruption-Tolerant Network Testing Using a LEO Satellite
May 2008
Delay/Disruption Tolerant Networking (DTN) "Bundles" have been proposed for deep-space communication in the "Interplanetary Internet." This paper describes the first DTN bundle protocol testing...
Provided by NASA
-
White Papers
A Time and Mutable Attribute-Based Access Control Model
Jun 2008
Access control is one of the most important technologies to guarantee computer security. A new model with support for valid time and usage constraint is described based on full analysis of flaws...
Provided by Tsinghua University
-
White Papers
An EM Based Frequency Domain Channel Estimation Algorithm for Multi-Access OFDM Systems
Oct 2009
Channel estimation is an important prerequisite for receiver design. In this paper the authors present a semi-blind low complexity frequency domain based channel estimation algorithm for...
Provided by King Fahd University of Petroleum & Minerals
-
White Papers
Rate Allocation for Satellite Systems With Correlated Channels Based on a Stackelberg Game
Aug 2009
In this paper, the authors consider the problem of capacity allocation for fixed broadband (Ka band) satellite networks with a large coverage and correlated atmospheric channel conditions both in...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
An Algorithm for NGN Feature Interaction Dectection
Dec 2009
With service design open to third-party in the evolving telecom networks, dynamic method is suitable for Feature Interaction (FI) detection. When implementing this method, however, the violation...
Provided by Academy Publisher
-
White Papers
An Innovative Pricing Method for Telecommunication Services Pricing Through American Options
Feb 2009
With the evolution of telecommunication networks and of their services the role of service provider is changed, so nowadays there is a coexistence of Network Operators and Virtual Operators. The...
Provided by Academy Publisher
-
Webcasts
Are You Ready for Consumer-Powered IT?
Jan 2010
If one is seeking insight on how to better address the employee productivity and support their increased mobility and device support, this webinar is for them. Listen to hear what devices...
Provided by Unisys
-
Product Specs
Avaya Proactive Outreach for Financial Services
Feb 2009
Increased competition and economic instability are among the many factors that make attracting new customers and retaining existing ones an ongoing challenge for financial services organizations....
Provided by Avaya
-
Product Specs
Avaya 1692 IP Speakerphone: A High-Quality, IP-Enabled Speakerphone for Conference Rooms
Jul 2010
The Avaya 1692 IP Speakerphone provides the convenience and productivity benefits inherent in a powerful, hands-free conference phone. It delivers the extensive set of Avaya Aura features directly...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9670G: One-Touch Access to Contacts, Information, and Applications
Apr 2009
The new Avaya one-X 9670G Deskphone is designed for the "Essential" user: someone who is constantly on the phone, handling multiple calls and is often mobile. The latest addition to the Avaya...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone Value Edition
Jan 2009
Avaya one-X is a portfolio of communications solutions that deliver a powerful and consistent communications experience for the end user - across a variety of devices and interfaces. Avaya one-X...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9640/9640G IP Telephone
May 2009
The Avaya one-X Deskphone solution family features an intuitive user interface which helps to make users proficient and confident in performing common telephone tasks such as setting up a...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9620/9620L/9620C IP Telephone
May 2009
The Avaya one-X Deskphone family features an intuitive user interface which helps to make users proficient and confident in performing common telephone tasks such as setting up a conference call...
Provided by Avaya
-
Product Specs
Avaya G450 Media Gateway
Jan 2010
The Avaya G450 Media Gateway provides a secure, reliable, and scalable platform for the delivery of Avaya Communication Manager-based IP telephony applications. It is targeted to mid to large...
Provided by Avaya
-
Product Specs
Avaya G430 Media Gateway
Jan 2010
The Avaya G430 Media Gateway provides a cost effective, scalable and secure platform for delivery of Avaya Communication Manager-based IP telephony applications. It is targeted to small to midsize...
Provided by Avaya
-
Product Specs
5600 Series IP Telephones
Nov 2007
Avaya 5600 series IP telephones are designed for organizations using IP Office that want a cost effective way to enjoy the benefits of converged communications. These H.323 IP telephones connect...
Provided by Avaya
-
Product Specs
Ethernet Routing Switch 4500 Series
Mar 2010
The Avaya Ethernet Routing Switch 4500 Series is a Stackable system providing highperformance, convergence-ready, secure and resilient Ethernet switching connectivity. Available as a range of 11...
Provided by Avaya
-
Product Specs
2400 Series Digital Telephones
Nov 2007
Avaya 2400 series digital telephones deliver advanced productivity-boosting features, including a large display, key labeling and a 100-entry call log. They are designed for both general business...
Provided by Avaya
-
Product Specs
Avaya One-X Deskphone 9650 IP Telephone
May 2009
The Avaya one-X Deskphone solution family features an intuitive user interface which helps to make users proficient and confident in performing common telephone tasks such as setting up a...
Provided by Avaya
-
Product Specs
The Avaya Desktop Video Device With the Avaya Flare Experience
Sep 2010
Communications and collaboration are a major challenge in today's enterprise, largely because the devices and user interfaces provided to today's enterprise workers are not up to the job:...
Provided by Avaya
-
Product Specs
1400 Series Digital Deskphones
Feb 2010
The 1400 Series Digital Deskphones family is designed for the same user profiles as the 9600 Series IP Deskphones or the 1600 Series IP Deskphones. By providing a range of endpoints covering the...
Provided by Avaya
-
Product Specs
Avaya 1220 IP Deskphone
Apr 2010
The 1220 IP Deskphone is a multi-line, intermediate-level desktop phone in the exciting 1200 Series IP Deskphones. Originally designed and optimized for small and medium-sized businesses, the 1200...
Provided by Avaya
-
Product Specs
Avaya 1210 IP Deskphone
Mar 2010
The 1210 IP Deskphone is a single-line, standard-level desktop phone in the exciting 1200 Series IP Deskphones. Originally designed and optimized for small and medium-sized businesses, the 1200...
Provided by Avaya
-
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
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
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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)
-
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)
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
White Papers
Nonlinear Equalization With Known Channel State Information in Satellite Communication
Nov 2008
Three nonlinear equalization algorithms are discussed for the case that training sequence is not available but Channel State Information (CSI) is known. The first algorithm is based on the...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Evaluation of Power Line Communication Equipment in Home Networks
Sep 2009
In this paper, the authors examine the performance of power line communication equipments (ethernet -to-powerline adapters) that come from different vendors and are based on different technologies...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Design and Simulation of a Reduced - Size VSAT Antenna With Appreciable Gain
Dec 2011
Information technology has become a very vital tool in the world today. There exist the need for the flow of information between arms of an organization such as banks, hospitals, business sectors...
Provided by ARPN Journal of Systems and Software
-
White Papers
A Queuing Model for Congestion Control and Reliable Data Transfer in Cable Access Networks
Jul 2011
A set of simple queuing theory models which can model the average response of a network of computers to a given traffic load has been implemented. The impact of variations in traffic patterns and...
Provided by International Journal of Computer Science and Information Technologies
-
White Papers
Real Time Telecom Revenue Assurance
Apr 2012
Telecommunication industry has seen phenomenal growth and intense competition in recent times. Basic connectivity has been commoditized and service providers need to provide personalized and...
Provided by IARIA
-
White Papers
Performance Modeling of Database Servers in a Telecommunication Service Management System
Apr 2012
Resource optimization mechanisms, as admission control and traffic management, require accurate performance models that capture the dynamics of the system during high loads. The main objective of...
Provided by IARIA
-
White Papers
Modeling Unified Interaction for Communication Service Integration
Jul 2011
Social network inspired communication services has made tremendous success, allowing users to communicate and share user generated contents in an efficient way. At the same time, Telecom services...
Provided by IARIA
-
White Papers
Towards Semantic Interoperability of Graphical Domain Specific Modeling Languages for Telecommunications Service Design
Jul 2011
High competition pressures Telecommunications service providers to reduce their concept-to-market time. To manage more easily service complexity among several actors in the design process and to...
Provided by IARIA
-
White Papers
A Cross-Layer Rate Control Mechanism for Link-Adaptive Satellite Integrated Services
Oct 2007
This paper presents a mechanism for dynamic rate control of satellite integrated services, based on a cross-layer approach, utilising link quality feedback from the satellite terminals. The...
Provided by Hindawi Publishing
-
White Papers
Research on Satellite Autonomous Orbit Determination Method Based on the Unscented Particle Filter with Embedded Earth Sensor Correction
May 2012
The direct earth horizon and starlight observation with earth sensor and star sensor is often used in the satellite autonomous orbit determination, which is a stable autonomous navigation method...
Provided by AICIT
-
White Papers
Integrate Research on Fuzzy Comprehensive Evaluation of the Satellite Engineering Project
May 2012
Risk management of satellite engineering project is a very complex job, and risk evaluation is one of the most important links. By predicting and classifying risk sources of a satellite...
Provided by AICIT
-
White Papers
The Local Circle Removal Algorithm for the LDPC Code in Communications
May 2012
The LDPC code, whose check matrix H is sparse, is widely utilized in the current communication systems due to its good performance that is near the Shannon limit. The girth length, which is the...
Provided by AICIT
-
Whitepapers
Eigenbeamforming for Interference Mitigation in GNSS Receivers
May 2011
This paper presents a novel beamforming approach for interference mitigation in Global Navigation Satellite Systems (GNSS) receivers. The proposed algorithm is based on a recently developed...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
-
Whitepapers
First-Order Elastic Nonlinearities of Bulk Acoustic Wave Resonators
Jan 2011
The authors propose a procedure to characterize the intrinsic nonlinearities of bulk acoustic wave resonators by performing one-port measurements of the second harmonic and second-order...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
DAVINCI Non-Binary LDPC Codes: Performance and Complexity Assessment
Mar 2010
Non-Binary Low Density Parity Check (NB-LDPC) codes are expected to reduce the performance gap between binary LDPC and Turbo Codes for both short and medium length codewords, retaining in both...
Provided by Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
-
Whitepapers
Call/Messaging Open API for Telecommunication Services
Feb 2008
With the saturation of existing intelligent network services, it is becoming increasingly difficult to develop new profitable services. The current trend seems to be moving toward the convergence...
Provided by KT
-
Whitepapers
New Correlation Functions for CBOC Satellite Signal Synchronization
Feb 2008
Binary Offset Carrier (BOC) signal synchronization is based on the correlation between the received and locally generated BOC signals. Thus, the multiple side-peaks in BOC autocorrelation are one...
Provided by Sungkyunkwan University
-
Whitepapers
A New Approach for the Construction of Powerful LDPC Convolutional Codes
Apr 2008
A novel approach for the algebraic construction of Low-Density Parity-Check (LDPC) convolutional codes is presented. It is based on the orthogonality structures of the codes. The proposed code...
Provided by Institute of Electrical & Electronic Engineers
