Communication Systems

COMMUNICATION SYSTEMS

Good communication is the bridge between confusion and clarity – Nat Turner

In this unit, the students are exposed to

• Basic elements of communication system

• Need for modulation and its types

• Propagation of electromagnetic waves through space

• Satellite communication

• Fiber optic communication

• RADAR

• Internet

• Global positioning system

• Applications of communication technology in fishing, mining, and agriculture sectors.

INTRODUCTION

Communication is the process of exchanging information by speaking, writing or using some other medium.

Communication has existed since the dawn of life in this world. Growth in science and technology removed the locational disadvantage effectively. Information can be exchanged from one person to another anywhere on this Earth. Right from the researches done in communication by great scientists like J.C. Bose, G. Marconi and Alexander Graham Bell, communication has witnessed development by leaps and bounds. The communication industry is one of the largest in size and is the oldest since communication through telegraph (1844), telephone (1876), and Radio (1887) started centuries back.

The intensive research in the mid and late nineteenth century has led to the development of long-distance transmission in the shortest possible time. However, the 20th century witnessed a leap over the development of communication, meeting the demands of speed and secured transfer of data. This section provides a glimpse of the basic concepts of electronic communication, some important communication systems and their applications.