2 Data Transmission
Stuart D. Walker
Emilio Hugues-Salas
Rouzbeh Razavi
Tahmina Ajmal
University of Essex
Introduction
Data transmission is the transfer of information from one entity (transmitter) to another (receiver) via a communication path. The data transfer can be local or remote. For example, it can be a simple file transfer within a computer or it can be Internet browsing where the information is exchanged with the Web over more than one communication medium. Other forms of data communication include e-mail, data storage, database queries and updates, and home shopping.
Three types of digital signal can be differentiated on the basis of bit error rate performance, bandwidth utilization, and delay requirements. They are data, voice, ...
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