Definition analog and digital communications are the two types of data transmission system however several factors generate the difference between the two the major difference between analog and digital communication lies in the signal being transmitted in analog communication the message signal is in analog form ie continuous time signal. However analog signals require hardware receivers and transmitters that are designed to perfectly fit the particular transmission digital digital signals are more tolerant to noise but digital signals can be completely corrupted in the presence of excess noise. This excellent book an introduction to analog and digital communication systems emphasizes the unifying principles governing all forms of communications whether analog or digital while the book takes a mathematical systems approach to all phases of the subject matter it also deals with contemporary circuit applications which are now available in tina by a click of the mouse from this electronic edition of the book published by designsoft. Difference between analog and digital communication the crucial difference between analog and digital communication is that analog communication uses analog signals for transmission and reception of data while digital communication uses digital signals for transmitting and receiving data analog signals are the continuous time varying signal while