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.
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.
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.
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.
For example, communicating between two PCs via a telephone line (connected between subscriber's
home and local office, then between local offices, and finally between local office and another
subscriber's home). The telephone line is an analog system. That means it can not be used for
digital transmission. If we try to transmit digital signals over the analog system, our bit rate or
bandwidth will be limited to a minimum. On a 4 kHz analog band limited system we can only
transmit at a maximum rate of roughly 1 kHz. Because a 1 kHz digital signal needs a bandwidth
An open data communication protocol developed in 1979
Published by Modicon
Supplied by many SCADA and HMI software
Have OPC Servers
2 serial transmission modes:
ASCII 10 bits
RTU (Binary) 11 bits
Station Device: 0 ~ 255
1xxxx: 4 digits for hexadecimal address (0000 ~ FFFF)
1xxxxx: 5 digital for decimal address (0 ~ 65535)
0xxxx: 4 digits for hexadecimal address (0000 ~ FFFF)
0xxxxx: 5 digital for decimal address (0 ~ 65535)
4xxxx: 4 dig...
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
Lecture "Radio Communication Circuits: Chapter 7&8" presents the following contents: Analog Modulation Circuits (Amplitude Modulation, Frequency Modulation, Phase Modulation), Digital Modulation Circuits (ASK, FSK, PSK, QPSK, M-ary PSK DPSK, M-ary QAM). Invite you to consult.
A computer network is designed to send information from one point to another. This information needs to be converted to either a digital signal or an analog signal for transmission. In this chapter, we discuss the first choice, conversion to digital signals.
Converting digital data to a bandpass analog signal.is traditionally called digitalto-analog conversion. Converting a low-pass analog signal to a bandpass analog signal is traditionally called analog-to-analog conversion. In this chapter, we discuss these two types of conversions.
Chapter 6 - Physical layer. In this chapter, we study the duties of the physical layer, first as a converter that converts data to signals, then as a manager that controls the medium. After reading this chapter, the reader should be able to: Distinguish between analog and digital data, distinguish between analog and digital signals, understand the concept of bandwidth and the relationship between bandwidth and data transmission speed,...
GSM (Global System for Mobile Communications), is a standard set developed by the European Telecommunications Standards Institute (ETSI) to describe technologies for second generation digital cellular networks. Developed as a replacement for first generation analog cellular networks, the GSM standard originally described a digital, circuit switched network optimized for full duplex voice telephony. The standard was expanded over time to include first circuit switched data transport, then packet data transport via GPRS (General Packet Radio Services)....
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....
The third generation (3G) mobile communication system is the next big thing in the world of mobile telecommunications. The first generation included analog mobile phones [e.g., Total Access Communications Systems (TACS), Nordic Mobile Telephone (NMT), and Advanced Mobile Phone Service (AMPS)], and the second generation (2G) included digital mobile phones [e.g., global system for mobile communications (GSM), personal digital cellular (PDC), and digital AMPS (D-AMPS)].
Video surveillance has been a key component of many organizations’ safety and security groups for decades. As an application, video surveillance has demonstrated its value and benefits countless times by:
Providing real-time monitoring of a facility's environment, people, and assets.
Recording the movements inside and outside a facility's environment for delayed viewing.
Many traditional video surveillance deployments are purely analog and have not yet been able to benefit from a converged network approach.
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.
This book is written primarily as a course text for the earUer parts of undergraduate courses,
BS courses in the USA and both CEng and lEng courses in the UK. It covers those topics of
analog electronics that we consider essential for students of Electrical, Electronic, Communication,
Instrumentation, Control, Computer and aUied engineering discipHnes.
A bit (binary digit) is the smallest unit of information
• N = 2n where N is the number of representations and n is the
number of bits (ex. ASCII, Unicode, PCM code etc.)
• Data communications transfer information using codes that
are transmitted as signals (either analog or digital)
• In general, analog lines provide a slow service that contains
high error rates.
With the rapid development of wireless communication networks,
it is expected that fourth-generation (4G) mobile systems will
appear in the market by the end of this decade. These systems
will aim at seamlessly integrating the existing wireless technologies
on a single handset: together with the traditional power/size/price
limitations, the mobile terminal should now comply with a multitude of wireless
Synthesis of Synchronization Algorithms
In this chapter we derive maximum-likelihood (ML) synchronization algorithms for time and phase. Frequency estimation and synchronization will be treated in Chapter 8. The algorithms are obtained as the solution to a mathematical optimization problem. The performance criterion we choose is the ML criterion. In analogy to filter design we speak of synthesis of synchronization algorithms to emphasize that we use mathematics to find algorithms - as opposed to analyzing their performance.