In this book, we present the basic principles that underlie the analysis and design of digital communication system. The subject of digital communications involves the tranamission in digital form a source that generates the information to one or more destinations. Of particular importance in the analysis and desigm of communication system...
Digital communications is a rapidly advancing applications area. Significant current activities
are in the development of mobile communications equipment for personal use, in
the expansion of the available bandwidth (and hence information carrying capacity) of the
backbone transmission structure through developments in optical fibre, and in the ubiquitous
use of networks for data communications.
This course is about a communication system which is used to transfer information from a source to a destination. Examples of communication systems are telephones, wireless data access, television and many others.How to transmit the information from a source to a destination.
How to evaluate the quality of the received information.
What kinds of design goals to consider for a specific application.
How to trade-off between various parameters (such as bandwidth and power) due to the design limitations and goals.
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.
Communications is a process by which information is
exchanged between individuals through a common system
of symbols, signs, or behaviour
“It is about communication between people; the rest is
Communication systems are reliable, economical and
efficient means of communications
Public switched telephone network (PSTN), mobile telephone
communication (GSM, 3G, 4G...), broadcast radio or television,
navigation systems, ...
The course is aiming at introducing fundamental issues
required for understanding and designing a (digital)
Important features of digital communication
Some basic concepts and definitions such as
as signal classification, spectral density,
random process, linear systems and signal
bandwidth.The first important step in any DCS:
Transforming the information source to a form
compatible with a digital syst
This intuitive yet rigourous introduction derives the core results of digital communication from first principles. Theory, rather than industry standards, motivates the engineering approaches, and key results are stated with all the required assumptions. The book emphasizes the geometric view, opening with the inner product, the matched filter for its computation, Parseval's theorem, the sampling theorem as an orthonormal expansion, the isometry between passband signals and their baseband representation, and the spectral-efficiency optimality of quadrature amplitude modulation (QAM).
Ebook Advanced digital communications has contents: Reviewof signal processingand detection, transmission over linear time invariantchannels, wireless communications, connections to information theory, appendix.
Reference subjects of digital information in English and fully understandable. This book was written to be a textbook for seniors or first - year graduate students interested in electrical communication systems. The book departs from the usual formata in two major respects. First, the text does not cover analog or pulse modulation systems.
The second edition of this accessible book provides readers with an introductory treatment of communication theory as applied to the transmission of information-bearing signals. While it covers analog communications, the emphasis is placed on digital technology. It begins by presenting the functional blocks that constitute the transmitter and receiver of a communication system. Readers will next learn about electrical noise and then progress to multiplexing and multiple access techniques.
Transforming the information source to a form
compatible with a digital system.
Uniform and non-uniform.
Binary pulse modulation.
M-ary pulse modulation.
M-PAM (M-ary Pulse amplitude modulation).Assuming real time transmission and equal energy per
transmission data bit for binary-PAM and 4-ary PAM
Evaluating the average probability of
symbol error for different bandpass
Comparing different modulation schemes
based on their error performances.Transforming signals to improve
communications performance by increasing
the robustness against channel impairments
(noise, interference, fading, ...)
Ebook Principles of communications this book is an excellent text book for undergraduate engineering in principles of communication systems. This book is for engineers so it assumes the reader has a good mathematics background. It covers digital communication systems that is prevalent in the communication industry.
There are many occasions when data need to be transmitted over a voice communication network.
Many people use a computer to connect to their Internet Service Provider via the telephone lines to
transmit and receive data, check their email, surf the Web, etc.
Telephone networks were originally built for human speech, not for computer data and is unsuitable for
digital communication in its raw form.
The idea of using periodic magnetic fields for properly bending the trajectories of
relativistic electrons, and making them generate coherent tunable radiation, appeared
as early as the middle of the last century. Further study of this subject, concerning both
fundamentals and practice, received a new impetus at the beginning of the seventies.
Since then, a huge amount of knowledge has been accumulated in this rapidly
developing field of research, creating a new class of lasers, the free electron lasers....
Topics in Digital Communications Digital communication system advantages and disadvantages Digital communication system classification Digitization of analog signals Digital transmission systems Data communication systems Integrated Services Digital Network and other advanced digital communication systems.
Multi-carrier modulation, in particular Orthogonal Frequency Division
Multiplexing (OFDM), has been successfully applied to a wide variety of
digital communications applications over the past several years. Although
OFDM has been chosen as the physical layer standard for a diversity of
important systems, the theory, algorithms, and implementation techniques
remain subjects of current interest. This is clear from the high volume of
papers appearing in technical journals and conferences.
This is an undergraduate course in digital communications, which is designed to prepare students for engineering work in high-tech industries and for graduate work in communications, signal processing, and computer systems. The course covers basic concepts and useful tools for design and performance analysis of transmitters and receivers in the physical layer of a communication system. Prerequisite: An introductory course in probability. A course in signals and systems. Texts: J.G. Proakis, M. Salehi, Communication Systems Engineering M. P. Fitz, A Course in Communication Theory Graders:...
This book follows from my first edition and is intended to provide a thorough,
up to date, treatment of wireless physical communications. The book is
derived from a compilation of course material that I have taught in a graduatelevel
course on physical wireless communications at Georgia Tech over the past
decade. This textbook differs from others on the subject by stressing mathematical
modeling and analysis. My approach is to include detailed derivations
from first principles.
PART C Baseband Communications
Digital Communication Receivers: Synchronization, Channel Estimation, and Signal Processing Heinrich Meyr, Marc Moeneclaey, Stefan A. Fechtel Copyright 1998 John Wiley & Sons, Inc. Print ISBN 0-471-50275-8 Online ISBN 0-471-20057-3
Chapter 2 Baseband Communications
2.1 Introduction to Digital Baseband Communication
In basebandcommunication,digital information is conveyedby meansof a pulse train. Digital baseband communicationis usedin many applications,suchas .