Wideband communication systems

Wideband communication (WC) is considered with reference to the general architecture of the public communication network. Two aspects of WC are discussed: wideband transmission within the network (linked to the traffic intensity to be dealt with) and wideband communication in the user access area (linked to the introduction of wideband services). In regard to the first aspect, the evolution of cable transmission (copper and optical fibers), radio relays, and satellite systems is considered: the main limitations on the transmission capacity are discussed with particular emphasis on transmission capacity per carrier. In regard to the second aspect, the possible wideband services are reviewed as requested by (or offered to) the business user and domestic users. Again, the possibility of using cable, radio, or satellite to reach the user is examined. WC within local area networks is discussed