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...
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.
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)
Digital & Analog Communication Systems (8th Edition) - Leon W. Couch introduce about digital and analog communication systems, with an emphasis on design. Readers will gain a working knowledge of both classical mathematical and personal computer methods to analyze, design, and simulate modern communication systems. MATLAB is integrated throughout.
All rights reserved. No part of this book may be reproduced in any form or by any means, without permission in writing from the publisher. The author and publisher of this book have used their best eﬀorts in preparing this book. These eﬀorts include the development, research, and testing of the theories and programs to determine their eﬀectiveness. The author and publisher make no warranty of any kind, expressed or implied
This book has been designed as a reference book for students or engineers studying
communication systems possibly in the curriculum of Electrical Engineering program rather
than a text book for any course on communication. Readers are supposed to have taken at least
two junior-level courses, one on signals and systems and another one on probability and random
Another class of linear codes, known as
We study the structure of the encoder.
We study different ways for representing
the encoder.Convolutional codes offer an approach to error control
coding substantially different from that of block codes.
A convolutional encoder:
encodes the entire data stream, into a single codeword.
does not need to segment the data stream into blocks of fixed
size (Convolutional codes are often forced to block structure by periodic
is a machine with memory.
What is VHDL?
VHDL is the VHSIC Hardware Description Language. VHSIC is an abbreviation for Very High Speed Integrated Circuit. It can describe the behavior and structure of electronic systems, but is particularly suited as a language to describe the structure and behavior of digital electronic hardware designs, such as ASICs and FPGAs as well as conventional digital circuits. VHDL is a notation, and is precisely and completely defined by the Language Reference Manual (LRM).
This application note introduces the concepts of digital modulation used in many communications systems today. Emphasis is placed on explaining the tradeoffs that are made to optimize efficiencies in system design. Most communications systems fall into one of three categories: bandwidth efficient, power efficient, or cost efficient. Bandwidth efficiency describes the ability of a modulation scheme to accommodate data within a limited bandwidth. Power efficiency describes the ability of the system to reliably send information at the lowest practical power level.
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:...
PART E over Fading Channels
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 11 Characterization, Modeling, and Simulation of Linear Fading Channels
The new technologies and communications systems are being set up in all areas. It
leads to treating data from different sources and for several proposes. But it is necessary
to obtain only the information that is required. Digital filters, together with
analogue filters, are used for these objectives. The main advantage of the digital filters
is that they can be applied at zero cost and with a great flexibility.
Discrete-Time Systems comprehend an important and broad research fi eld. The consolidation
of digital-based computational means in the present, pushes a technological
tool into the fi eld with a tremendous impact in areas like Control, Signal Processing,
Communications, System Modelling and related Applications. This fact has enabled
numerous contributions and developments which are either genuinely original as
discrete-time systems or are mirrors from their counterparts of previously existing
Recently, mobile communication services are penetrating into our society at an explosive
growth rate. All of the current communication systems have adopted digital
technology. Nowadays, the demand for various wideband services such as high-speed
Internet access and video/high-quality image transmission, is increasing. The thirdgeneration
mobile communication system has been, designed to support wideband
services with the same quality as the fi xed networks.
Over the last ten years, the impact of wireless communications on
the way we live and do business has been surpassed only by the impact
of the Internet. Cell phones, pagers, and wireless Personal Digital
Assistants (PDAs) have become so commonplace in our lives that it is
easy to forget that ten years ago, they were a rarity.
MATLAB (Matrix Laboratory) is a matrix-oriented tool for mathematical
programming, applied for numerical computation and simulation purposes. Together
with its dynamic simulation toolbox Simulink, as a graphical environment for the
simulation of dynamic systems, it has become a very powerful tool suitable for a large
number of applications in many areas of research and development.
Modern electronic systems are increasingly digital: digital microprocessors,
digital logic, digital interfaces. Digital logic is easier to design and understand,
and it is much more ﬂexible than the equivalent analog circuitry would be.
As an example, imagine trying to implement any kind of sophisticated micro-
processor with analog parts. Digital electronics lets the PC on your desk
execute different programs at different times, perform complex calculations,
and communicate via the World Wide Web....
As we step forward into the new millennium with wireless technologies leading
the way in which we communicate, it becomes increasingly clear that the
dominant consideration in the design of systems employing such technologies
will be their ability to perform with adequate margin over a channel perturbed
by a host of impairments not the least of which is multipath fading.
This book tries to address different aspects and issues related to video and multimedia distribution over the heterogeneous environment considering broadband satellite networks and general wireless systems where wireless communications and conditions can pose serious problems to the efficient and reliable delivery of content. Specific chapters of the book relate to different research topics covering the architectural aspects of the most famous DVB standard (DVB-T, DVB-S/S2, DVB-H etc.
DSP System Implementation
This chapter is concerned with the implementation of digital signal processing systems. It serves the purpose to make the algorithm designer aware of the strong interaction between algorithm and architecture design. Digital signal processing systems are an assembly of heterogeneous hardware components. The functionality is implemented in both hardware and software subsystems. A brief overview of DSP hardware technology is given in Section 10.1. Design time and cost become increasingly more important than chip cost.