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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
Polarization-Diversity Cross-Shaped Patch Antenna for Satellite-DMB Systems
Apr 2010
A small reconfigurable patch antenna is proposed to achieve polarization diversity for digital multimedia broadcasting systems at 2.6 GHz. To obtain polarization diversity, a pair of on-slit PIN...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Optimal Buffer Allocation in Tandem Queues With Communication Blocking
Feb 2009
In this paper, the authors consider an m-node tandem queue (queues in series) with a Poisson arrival process and either deterministic or non-overlapping service times. With the assumption that...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Future Automotive Insurance System Based on Telematics Technology
Feb 2008
With the proliferation of vehicles and advancement of Information Technology, the technology of Telematics, which provides valuable services to people by collecting and analyzing the information...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Iterative Decoding for Low-Density Parity-Check Lattices
Feb 2008
High-dimensional lattice codes can provide relatively large coding gains and the gain increases with dimension. However, the authors are difficult to implement in practice due to the decoding...
Provided by Korea Advanced Institute of Science and Technology
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Whitepapers
Orbit Determination Accuracy Improvement for Geostationary Satellite With Single Station Antenna Tracking Data
Dec 2008
An operational Orbit Determination (OD) and prediction system for the geostationary Communication, Ocean, and Meteorological Satellite (COMS) mission requires accurate satellite positioning...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
A Vehicle Detection Approach From Satellite Imagery Using Antibody Networks
Feb 2009
This paper presents a novel vehicle detection approach based on artificial immune principle. The approach is to build an artificial immune system for vehicle detection from high resolution...
Provided by Wuhan University
-
Whitepapers
Performance Enhancements for Asynchronous Random Access Protocols Over Satellite
Apr 2011
In this paper, a novel enhancement of the well known ALOHA random access mechanism is presented which largely extends the achievable throughput compared to traditional ALOHA and provides...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Design of Circular Orbit Satellite Link for Maximum Data Transfer
Apr 2011
The paper provides an analytical expression for the amount of theoretically transmittable data to/from a Low Earth Orbit (LEO) or Medium Earth Orbit (MEO) satellite and a fixed ground station,...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Controlling LDPC Absorbing Sets Via the Null Space of the Cycle Consistency Matrix
Apr 2011
This paper focuses on controlling absorbing sets for a class of regular LDPC codes, known as Separable, Circulant-Based (SCB) codes. For a specified circulant matrix, SCB codes all share a common...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Comparison of the Detrimental Effects of Trapping Sets in LDPC Codes
Apr 2011
This paper presents a method to compare the detrimental effect of different trapping sets in the LDPC codes for an AWGN channel. The messages from the check nodes in the trapping set induced...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Partially Quasi-Cyclic Protograph-Based LDPC Codes
Apr 2011
A significant amount of the analysis of protograph-based Low-Density Parity-Check (LDPC) codes has been devoted to the subclass of Quasi-Cyclic (QC) LDPC codes. Despite their implementation...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Analysis of Error Floors of Non-Binary LDPC Codes Over MBIOS Channel
Apr 2011
In this paper, the authors investigate the error floors of non-binary Low-Density Parity-Check (LDPC) codes transmitted over the Memory-less Binary-Input Output-Symmetric (MBIOS) channels. They...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Iterative Decoding of LDPC-Coded BDPSK With New LLR Metric Over the Noncoherent Channel
Apr 2011
The authors propose an iterative decoding scheme for low density parity check codes concatenated with Binary Differential Phase Shift Keying (BDPSK) in additive white Gaussian channels with...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Multiple Phased-Burst Correcting Superposition Product LDPC Codes
Apr 2011
In this paper, a class of product codes based on Low-Density Parity Check (LDPC) constituent codes are constructed for Multiple Phased-Burst Erasure Correction (MPBEC). These codes are shown to...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Improved Decoding of Binary and Non-Binary LDPC Codes by Probabilistic Shuffled Belief Propagation
Apr 2011
Low-Density Parity-Check (LDPC) codes have proved to be very powerful channel coding schemes with a broad range of applications. However, as maximum-likelihood decoding is utterly complex,...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Optimization of Group Layered Multi-Antenna Architectures With LDPC Codes
Mar 2009
Group Layered multi-antenna Architectures (GLAs) employing orthogonal space-time block codes and spatial multiplexing techniques may simultaneously exploit diversity and multiplexing gains with...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Convolutional Codes for Iterative Decoding
Jul 2008
This paper gives an overview of three different classes of convolutional codes that are suitable for iterative decoding. The authors are characterized by the type of component codes that are used...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
SOFTREC G3, Software Receiver and Signal Analysis for GNSS Bands
Jul 2008
In this paper, the concept of SDR, its use in modern GNSS, existing applications, and future developments are briefly reviewed. In particular, the focus is over the presentation of two...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
GNSS Receiver Reference Design
Jul 2008
Satellite based navigation is a rapidly growing application of satellite systems. The research of the topic is lacking "Open source" hardware receivers. The group's purpose is to provide one. In...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Low-Complexity LDPC Codes With Near-Optimum Performance Over the BEC
Jul 2008
Recent works showed how Low-Density Parity-Check (LDPC) erasure correcting codes, under Maximum Likelihood (ML) decoding, are capable of tightly approaching the performance of an ideal...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Recent Improvements in Satellite Networks for Search and Rescue: MEOSAR
Jul 2008
The terms uninterrupted communication and communication technologies remind one about the satellite network technologies. By focusing on the satellite technology-based fields and corresponding...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Noise Thresholds for Discrete LDPC Decoding Mappings
Oct 2008
For decoding Low-Density Parity-Check (LDPC) codes on discrete memoryless channels, a method to quantize messages and to find message-passing decoding functions for the variable and check nodes is...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Fast Identification of Error-Prone Patterns for LDPC Codes Under Message Passing Decoding
Oct 2008
Although density evolution accurately predicts the asymptotic performance of LDPC codes, it provides limited information for codes of short or moderate block length. For this reason, combinatorial...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A Class of Quantum LDPC Codes Constructed From Finite Geometries
Oct 2008
Low-Density Parity Check (LDPC) codes are a significant class of classical codes with many applications. Several good LDPC codes have been constructed using random, algebraic, and finite...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Clustering of Cycles and Construction of LDPC Codes
Oct 2008
The clustering of cycles to form stopping sets are first observed by T. Tian and et al. As the determination of stopping sets of minimum size is NP-hard, the authors propose to consider clustering...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Rate Adaptive Binary Erasure Quantization With Dual Fountain Codes
Oct 2008
In this contribution, duals of fountain codes are introduced and their use for lossy source compression is investigated. It is shown both theoretically and experimentally that the source coding...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A Simplified Simultaneous X/Ka-Band Feed-system Design
Sep 2008
A variation on an existing antenna feed system for use on simultaneous X/Ka-band satellite ground terminals is presented. The modified design retains the important functionality of the existing...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Analytical Evaluation of the Role of Estimation and Quantization Errors in Downstream Vectored VDSL Systems
Sep 2011
The authors investigate the effect of non idealities in the diagonalizing precoder vectoring technique used for cancellation of the far-end crosstalk in downstream VDSL networks. By using...
Provided by IARIA
-
Whitepapers
The Outage Probability of the Satellite Telecommunication System in the Presence of Fading With Switch and Stay Combining on Satellite and Earth Station
Sep 2011
In this paper, the satellite communication system consisting of the earth transmitting station and the satellite transponder was considered. Switch and Stay Combining (SSC) diversity technics are...
Provided by IARIA
-
Whitepapers
A New K-mean Color Image Segmentation With Cosine Distance for Satellite Images
Jun 2012
This paper represents unsupervised method of k-means segmentation which is new adaptive technique of color-texture segmentation. With the progress in satellite images, the image segmentation...
Provided by International Journal of Engineering and Advanced Technology (IJEAT)
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Product Specs
Avaya 1150E IP Deskphone
Mar 2010
The Avaya 1150E IP Deskphone with Gigabit Ethernet brings best-in-class IP Telephony and advanced communication features to ACD environments and the IP Contact Center. An ideal solution for agents...
Provided by Avaya
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Product Specs
Avaya 1140E IP Deskphone
Apr 2010
The Avaya 1140E IP Deskphone with Gigabit Ethernet brings a new dimension in communication features and capabilities to the professional IP Deskphone. Ideally suited for managers and knowledge...
Provided by Avaya
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Product Specs
Avaya 1120E IP Deskphone
Apr 2010
The Avaya 1120E IP Deskphone with Gigabit Ethernet unveils an exciting array of innovative communication features and capabilities, ideally suited for office workers and administrative personnel....
Provided by Avaya
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Product Specs
Avaya 1110 IP Deskphone
Mar 2010
The Avaya 1110 IP Deskphone brings a new realm of capabilities to the standard-level set, designed to meet general-purpose communication needs. The single-line Avaya 1110 IP Deskphone delivers...
Provided by Avaya
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White Papers
Power-Optimized Solutions for Telecom Applications
Jan 2009
Some telecommunications (telecom) carriers now target a 20 percent power reduction per year on the equipment they deploy. This is a response to increasing power consumption in central offices,...
Provided by Altera
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White Papers
Analyzing the Relationship between Regulation and Investment in the Telecom Sector
Mar 2008
This paper analyses the relationship between entry regulation and infrastructure investment in the telecommunication sector. The empirical analysis author's conduct is based on a comprehensive...
Provided by ESMT - European School of Management and Technology
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White Papers
Telecommunication Law And Regulations: Third Edition
Apr 2009
The origins of this book lie in a University of London LLM course in Telecommunications Law, for which I became responsible and taught on when I joined the Centre for Commercial Law Studies. One...
Provided by University of Oxford
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White Papers
Hong Kong and Singapore: Two Models of Telecommunications Regulation?
May 2008
This paper examines how telecommunications regulation in Hong Kong and Singapore has evolved since the 1970s and in particular, how the boundaries between the telecommunications and broadcasting...
Provided by University of Hong Kong
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White Papers
Telecom Infrastructure Sharing Regulatory Enablers and Economic Benefits
Nov 2007
The liberalization of a country's telecom industry can enable economic growth across various sectors, but its success depends on regulatory policies that are conducive to the development of...
Provided by Booz Allen Hamilton
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White Papers
Benchmark Indicators for African National Telecom Regularly Authority Websites
Sep 2009
The concept of governance in recent years has evolved with the introduction of information and communication technologies (ICT). Governments can now provide services without the need for the...
Provided by LIRNE.NET
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White Papers
Brasil Telecom: The Briefing of a Case on Telecom Regulation in Emerging Markets
Dec 2008
In 2005, the telecom regulator in Brazil asked incumbents to undertake the account separation and cost modeling. The goal was allowing the regulator to set prices based on an assessment of...
Provided by Universidade Paulista
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White Papers
Reforming Telecom Regulation: An Essay Review of Nuechterlein and Weiser's Digital Crossroads
Sep 2008
The U.S. telecom industry has long been evolving from regulated monopoly to competition in various services such as telephony and video. This trend is accelerating with the spread of digital...
Provided by Georgetown University
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White Papers
Twombly and the Evolution of Telecom Regulation
Dec 2007
The plaintiffs in Twombly v. Bell Atlantic alleged that the nation's largest incumbent telephone service providers violated ยง 1 of the Sherman Act by conspiring to hinder competition in their...
Provided by University of Florida
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White Papers
Telecommunications Regulation: Current Approaches with the End in Sight
Oct 2007
Authors consider the question in this paper of the transition from regulated monopoly to competitive local markets in telecommunications. Technological change in terms of cellular/mobile...
Provided by Georgetown University
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Whitepapers
Telecom Mashups: Enabling Web 2.0 for Telecom Services
Dec 2007
The emerging Web 2.0 marketplace presents an important opportunity for Telecom operators to sell their own capabilities and content as services. Operators have a wealth of content associated with...
Provided by IBM
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White Papers
Sales Tax Information for Telecommunications Service Providers
Jan 2010
This publication provides sales tax information for telecommunications (telecom) service providers. It includes Utah law and Tax Commission rules, but is not all-inclusive. Future law or rule...
Provided by State of Utah
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Case Studies
Aiming for Fast Growth? Changing the Ways of the World?
May 2010
This paper is a discussion between a business publication and a Senior Manager of a mobile communications corporation that has gathered an impressive reputation in the Indian telecommunications...
Provided by Pierian Services
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White Papers
Profiling the 'Mobile Phone Only' Population: A Study of Australians with a Mobile Phone and No Landline Telephone
May 2009
The document brings to light the factors that are known to stimulate active participation in the social structures of a Learning Network. With this goal, the paper investigates various aspects of...
Provided by Social Research Centre
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White Papers
The Role of Prosody in a Voicemail Summarization System
Jan 2010
When a speaker leaves a voicemail message there are prosodic cues that emphasize the important points in the message, in addition to lexical content. In this paper comparison and visualization on...
Provided by University of Sheffield
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White Papers
10 Principles of Radio Advertising that Apply to Effective Voice Mail
Jun 2008
Some principles from the "Science" of radio advertising that can make one's voice mail "Commercial" more effective are mentioned in this paper. These include linking specific benefits directly to...
Provided by BARON
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White Papers
Oracle Carrier-Grade Framework: A Foundation for Next-Generation Telecom Appliances
Mar 2010
Trends in the telecom market create an increasing demand for expanded and flexible services, across multiple networks and media types. At the same time, the profitability of the industry's basic...
Provided by Oracle
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White Papers
Turning Customer Interaction Into Profitable Relationships
Sep 2009
Effective customer communication boosts customer loyalty, ensures brand and regulatory compliance, reduces environmental impact and helps control a range of costs such as reductions in IT...
Provided by Quocirca
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White Papers
Telecoms Companies' Re-Invention - From Voice to e-Service Provision
Sep 2009
In a shrinking world where individuals have more choices in almost every aspect of their lives than ever before, and more ways to communicate with each other and the world at large, the bonds and...
Provided by Quocirca
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White Papers
Telecoms Reinvention - Optimising the Online Customer Experience
Feb 2010
As networks, devices and media converge, telecoms companies have increasingly complex catalogues of products and services on offer to customers who are, in turn, becoming more aware that they can...
Provided by Quocirca
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White Papers
Real-Time Convergent Mediation?: Addressing the Challenges of Convergence
Nov 2007
Convergence has become the strongest driver of the telecom services industry. Service providers are constantly focusing on offering a rich mix of services to customers. As a result, there is a...
Provided by SunTec Business Solutions
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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
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White Papers
Get Personal: Capitalize on Your Subscriber Data With a Unified User Profile
Sep 2008
This paper discusses the role of user profile management. SPs' efforts to manage, enrich, capitalize on, and provision user information across multiple databases are critical to fuel...
Provided by IDG (International Data Group)
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White Papers
Red Hat and the Telecommunications Industry
Jun 2009
The telecommunications industry is in a constant state of great change and opportunity. To remain technologically viable and seize market opportunities as they arise, telecoms need flexible,...
Provided by Red Hat
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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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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
Polarization-Diversity Cross-Shaped Patch Antenna for Satellite-DMB Systems
Apr 2010
A small reconfigurable patch antenna is proposed to achieve polarization diversity for digital multimedia broadcasting systems at 2.6 GHz. To obtain polarization diversity, a pair of on-slit PIN...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Optimal Buffer Allocation in Tandem Queues With Communication Blocking
Feb 2009
In this paper, the authors consider an m-node tandem queue (queues in series) with a Poisson arrival process and either deterministic or non-overlapping service times. With the assumption that...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Future Automotive Insurance System Based on Telematics Technology
Feb 2008
With the proliferation of vehicles and advancement of Information Technology, the technology of Telematics, which provides valuable services to people by collecting and analyzing the information...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
Iterative Decoding for Low-Density Parity-Check Lattices
Feb 2008
High-dimensional lattice codes can provide relatively large coding gains and the gain increases with dimension. However, the authors are difficult to implement in practice due to the decoding...
Provided by Korea Advanced Institute of Science and Technology
-
Whitepapers
Orbit Determination Accuracy Improvement for Geostationary Satellite With Single Station Antenna Tracking Data
Dec 2008
An operational Orbit Determination (OD) and prediction system for the geostationary Communication, Ocean, and Meteorological Satellite (COMS) mission requires accurate satellite positioning...
Provided by Electronics and Telecommunication Research Institute
-
Whitepapers
A Vehicle Detection Approach From Satellite Imagery Using Antibody Networks
Feb 2009
This paper presents a novel vehicle detection approach based on artificial immune principle. The approach is to build an artificial immune system for vehicle detection from high resolution...
Provided by Wuhan University
-
Whitepapers
Performance Enhancements for Asynchronous Random Access Protocols Over Satellite
Apr 2011
In this paper, a novel enhancement of the well known ALOHA random access mechanism is presented which largely extends the achievable throughput compared to traditional ALOHA and provides...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Design of Circular Orbit Satellite Link for Maximum Data Transfer
Apr 2011
The paper provides an analytical expression for the amount of theoretically transmittable data to/from a Low Earth Orbit (LEO) or Medium Earth Orbit (MEO) satellite and a fixed ground station,...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Controlling LDPC Absorbing Sets Via the Null Space of the Cycle Consistency Matrix
Apr 2011
This paper focuses on controlling absorbing sets for a class of regular LDPC codes, known as Separable, Circulant-Based (SCB) codes. For a specified circulant matrix, SCB codes all share a common...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Comparison of the Detrimental Effects of Trapping Sets in LDPC Codes
Apr 2011
This paper presents a method to compare the detrimental effect of different trapping sets in the LDPC codes for an AWGN channel. The messages from the check nodes in the trapping set induced...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Partially Quasi-Cyclic Protograph-Based LDPC Codes
Apr 2011
A significant amount of the analysis of protograph-based Low-Density Parity-Check (LDPC) codes has been devoted to the subclass of Quasi-Cyclic (QC) LDPC codes. Despite their implementation...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Analysis of Error Floors of Non-Binary LDPC Codes Over MBIOS Channel
Apr 2011
In this paper, the authors investigate the error floors of non-binary Low-Density Parity-Check (LDPC) codes transmitted over the Memory-less Binary-Input Output-Symmetric (MBIOS) channels. They...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Iterative Decoding of LDPC-Coded BDPSK With New LLR Metric Over the Noncoherent Channel
Apr 2011
The authors propose an iterative decoding scheme for low density parity check codes concatenated with Binary Differential Phase Shift Keying (BDPSK) in additive white Gaussian channels with...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Multiple Phased-Burst Correcting Superposition Product LDPC Codes
Apr 2011
In this paper, a class of product codes based on Low-Density Parity Check (LDPC) constituent codes are constructed for Multiple Phased-Burst Erasure Correction (MPBEC). These codes are shown to...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Improved Decoding of Binary and Non-Binary LDPC Codes by Probabilistic Shuffled Belief Propagation
Apr 2011
Low-Density Parity-Check (LDPC) codes have proved to be very powerful channel coding schemes with a broad range of applications. However, as maximum-likelihood decoding is utterly complex,...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Optimization of Group Layered Multi-Antenna Architectures With LDPC Codes
Mar 2009
Group Layered multi-antenna Architectures (GLAs) employing orthogonal space-time block codes and spatial multiplexing techniques may simultaneously exploit diversity and multiplexing gains with...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Convolutional Codes for Iterative Decoding
Jul 2008
This paper gives an overview of three different classes of convolutional codes that are suitable for iterative decoding. The authors are characterized by the type of component codes that are used...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
SOFTREC G3, Software Receiver and Signal Analysis for GNSS Bands
Jul 2008
In this paper, the concept of SDR, its use in modern GNSS, existing applications, and future developments are briefly reviewed. In particular, the focus is over the presentation of two...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
GNSS Receiver Reference Design
Jul 2008
Satellite based navigation is a rapidly growing application of satellite systems. The research of the topic is lacking "Open source" hardware receivers. The group's purpose is to provide one. In...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Low-Complexity LDPC Codes With Near-Optimum Performance Over the BEC
Jul 2008
Recent works showed how Low-Density Parity-Check (LDPC) erasure correcting codes, under Maximum Likelihood (ML) decoding, are capable of tightly approaching the performance of an ideal...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Recent Improvements in Satellite Networks for Search and Rescue: MEOSAR
Jul 2008
The terms uninterrupted communication and communication technologies remind one about the satellite network technologies. By focusing on the satellite technology-based fields and corresponding...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Noise Thresholds for Discrete LDPC Decoding Mappings
Oct 2008
For decoding Low-Density Parity-Check (LDPC) codes on discrete memoryless channels, a method to quantize messages and to find message-passing decoding functions for the variable and check nodes is...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Fast Identification of Error-Prone Patterns for LDPC Codes Under Message Passing Decoding
Oct 2008
Although density evolution accurately predicts the asymptotic performance of LDPC codes, it provides limited information for codes of short or moderate block length. For this reason, combinatorial...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A Class of Quantum LDPC Codes Constructed From Finite Geometries
Oct 2008
Low-Density Parity Check (LDPC) codes are a significant class of classical codes with many applications. Several good LDPC codes have been constructed using random, algebraic, and finite...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Clustering of Cycles and Construction of LDPC Codes
Oct 2008
The clustering of cycles to form stopping sets are first observed by T. Tian and et al. As the determination of stopping sets of minimum size is NP-hard, the authors propose to consider clustering...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Rate Adaptive Binary Erasure Quantization With Dual Fountain Codes
Oct 2008
In this contribution, duals of fountain codes are introduced and their use for lossy source compression is investigated. It is shown both theoretically and experimentally that the source coding...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
A Simplified Simultaneous X/Ka-Band Feed-system Design
Sep 2008
A variation on an existing antenna feed system for use on simultaneous X/Ka-band satellite ground terminals is presented. The modified design retains the important functionality of the existing...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Analytical Evaluation of the Role of Estimation and Quantization Errors in Downstream Vectored VDSL Systems
Sep 2011
The authors investigate the effect of non idealities in the diagonalizing precoder vectoring technique used for cancellation of the far-end crosstalk in downstream VDSL networks. By using...
Provided by IARIA
-
Whitepapers
The Outage Probability of the Satellite Telecommunication System in the Presence of Fading With Switch and Stay Combining on Satellite and Earth Station
Sep 2011
In this paper, the satellite communication system consisting of the earth transmitting station and the satellite transponder was considered. Switch and Stay Combining (SSC) diversity technics are...
Provided by IARIA
-
Whitepapers
A New K-mean Color Image Segmentation With Cosine Distance for Satellite Images
Jun 2012
This paper represents unsupervised method of k-means segmentation which is new adaptive technique of color-texture segmentation. With the progress in satellite images, the image segmentation...
Provided by International Journal of Engineering and Advanced Technology (IJEAT)
