Analogue and digital communications form an essential part of the principles of communication engineering and communication-theory courses for electrical and computer engineers. This involves the analysis and design of systems and networks that transmit data, as in satellite communications, hotlines, LANs, compact discs and the like. Analogue communications include radio and television, but, in recent years, the explosive developments in computer technology have made digital communications a crucial element in the electrical-engineering curriculum. This revision of "Analog and Digital Communications" aims to reflect the growing importance of digital technology. This edition has been revised to conform to the current curriculum in electrical and computer engineering, and reflects the increased importance of digital technology in engineering.