.Digital Modulation Techniques
.For a listing of recent titles in the Artech House Telecommunications Library, turn to the back of this book.
.Digital Modulation Techniques
.Library of Congress Cataloging-in-Publication Data Xiong, Fuqin. Digital modulation techniques / Fuqin Xiong. p. cm. - (Artech House telecommunications library) Includes bibliographical references and index. ISBN 0-89006-970-0 (alk. paper) 1. Digital modulation. I. Title. II. Series. TK5103.7.X65 2000 621.
This lecture covers the fundamentals of spread spectrum modulation, which can be defined
as any modulation technique that requires a transmission bandwidth much greater than the
modulating signal bandwidth, independently of the bandwidth of the modulating signal. After
reviewing basic digital modulation techniques, the principal forms of spread spectrum modulation
are described. One of the most important components of a spread spectrum system is the
spreading code, and several types and their characteristics are described.
The two fundamental building blocks of a digital communication system are modulation and channel coding. They enable reliable communication by providing signaling schemes and receiver structures that utilize the available spectrum and power efficiently.
Another source of error due to filtering effect of the system:
-Inter-symbol interference (ISI)
-The techniques to reduce ISI
-Pulse shaping to have zero ISI at the sampling time
-Equalization to combat the filtering effect of the channel
CONFORMAL AND INTENSITY-MODULATED RADIOTHERAPY—WHY
Whilst drug development plays an important but expensive role in the treatment
of some cancers, it is estimated that, at a time when 2% of patients are cured
by drugs, some 30% are cured by a combination of surgery and radiotherapy.
Radiotherapy may be the ‘sticking plaster of cancer’ but it is likely to be necessary
for many decades to come and it merits continual development.
Lectures Module 1: Introduction to the course provides a comprehensive overview of the issues surrounding the teaching of young learners such as theory and practice, classroom techniques, clear examples, tasks. At the end of the course, the students will be able to: Understand the special characteristics of children as language learners; manage children language classes; create, adapt and analyse activities and resources for YL apply theoretical background into practice of teaching language skills.
Bài giảng Kịch bản HDH: Module 2 - Core Windows PowerShell™ Cmdlets presented recognize Windows PowerShell’s core cmdlets; sort, group, count, measure, and select objects in the pipeline; import and export objects from various sources; compare sets of objects.
The text of the first volume of the book covers the major topics in ring and module theory and includes both fundamental classical results and more recent developments. The basic tools of investigation are methods from the theory of modules, which allow a very simple and clear approach both to classical and new results. An unusual main feature of this book is the use of the technique of quivers for studying the structure of rings. A considerable part of the first volume of the book is devoted to a study of special classes of rings and algebras, such as serial...
(BQ) Module 8: Rubber nursery management deals with certain teaching and learning strategies that enhance knowledge and skills of the participants focused on the various concepts of nursery managemetn practice and techniques used in the productio and maintenance od quality palanting materials of rubber from rootstocks propagation to green budding method of asexual propagation.
One of the main advantages of this technique is that it can produce the scaffold with main
structural feature suitable for growth of the cell and subsequent tissue organization (Li &
Tuan, 2009; Liang et al., 2007; Leong et al., 2008). It can produce the ultra fine fibers with
special orientation, high aspect ratio, high surface area, and having control over pore
Bài giảng Kịch bản HDH: Module 3 - Understanding and Using the formatting system pretend List and explain the rules that the shell follows when converting objects into a text displan; explain what cmdlets can successfully receive the output of a Format - cmdlet; identify the configuration files used to specify the shell’s default formatting; identify the general procedure used to provide custom formatting instructions in XML files.
Bài giảng Kịch bản HDH: Module 5 - Automating Active Directory® Administration presented Use the AD - drive in Windows PowerShell, identify Active Directory cmdlets in Windows PowerShell, perform key active directory management tasks related to users, groups, computers, and organizational units, by means of Windows PowerShell cmdlets.
Bài giảng Kịch bản HDH: Module 8 - Intermediate Scripting presented Use variables, arrays, escape characters, and advanced operators; use all of the Windows PowerShell scripting constructs; describe Windows PowerShell’s scope hierarchy.
Bài giảng Kịch bản HDH: Module 9 - Error Handling, Debugging and Modularization presented trap and handle run-time errors within a script; debug scripts using a variety of techniques and tools; modularize scripts by writing various types of functions.
Bài giảng Kịch bản HDH: Module 10 - Automating Windows Server® 2008 R2 Administration presented list the modules included with Windows Server 2008 R2, add and remove Windows features from the command-line, manage Group Policy objects from the command-line, use Troubleshooting Packs from the command-line.
Bài giảng Kịch bản HDH: Module 11 - Advanced Windows PowerShell™ Tips and Tricks presented create and safely use a Windows PowerShell profile script; re-package scripts as script modules for easier distribution; add comment-based help to functions, scripts, and script modules.
The Data-over-Cable Service Interface Specification (DOCSIS)is an international standard developed by CableLabs, a non-profit research and development consortium for cable-related technologies.
DOCSIS specifies the OSI Layer 1 and Layer 2 requirements:
Physical layer-For data signals that the cable operator can use, DOCSIS specifies the channel widths (bandwidths of each channel) as 200 kHz, 400 kHz, 800 kHz, 1.6 MHz, 3.2 MHz, and 6.4 MHz. DOCSIS also specifies modulation techniques (the way to use the RF signal to convey digital data).