Introduction to Communication System

Communication, in its most general sense, is simply the exchange of information, and human beings have practised it since ancient times in many forms -- speaking, writing, singing, and even body language. The discovery of electricity in the late 19th century changed human communication dramatically, and the modern communication systems in use today are built directly on the discoveries and inventions of a number of scientists working in the 19th and 20th centuries, including J. C. Bose (1858-1937), S. F. B. Morse (1791-1872), G. Marconi (1874-1937) and Alexander Graham Bell (1847-1922). …