Overview

Learning Objectives. On completion of this chapter the reader will have a knowledge on:

• Data Transmission Concepts

• Pulse Codes and their types

• Analog and Digital Modulation Techniques

• Wireless Communication

• Trends in Wireless Communication

• Software Defined Radio

• RF Network Analyzer

• Distributed Automation and Control Systems

• CORBA-Based Automation Systems

• SCADA Architecture

8.1 Introduction

Data transmission is the conveyance of any kind of information from one space to another. Historically this could be done by courier, a chain of bonfires or semaphores, and later by Morse code over copper wires. In recent computer terms, it means sending a stream of bits or bytes from one location to another using any number of technologies, such as copper wire, optical fibre, laser, radio, or infrared (IR) light. Practical examples include moving data from one storage device to another and accessing a website, which involves data transfer from web servers to a user's browser. A related concept to data transmission is the data transmission protocol used to make the data transfer legible. Data transmission plays a very important role in all kind of digital equipments as it is the responsibility of these devices to transmit the data without being lost. It is the role of these equipments to make sure that external environment data are transmitted in the same manner without being changed for processing. The information that received by these instrument aids in conditioning so the data available could be relied for more efficiency...