Covers basic principles and techniques of digital data transmission, emphasizing its practical problems and the variety of techniques that can be used in the design of a modem. Examines the nature and structure of different digital signals and the basic mechanisms involved in a detection process. Contains a non-mathematical survey of the properties of voice-frequency channels formed by telephone circuits and HF radio links, and the techniques used or proposed for the transmission of digital data over these channels. Describes principles of the coherent, noncoherent, and incoherent detection of digital signals. Covers matched-filter detection, optimum combination of transmitter and receiver filters, and baseband and modulated-carrier signals.

"When the United States Air Force Academy's cadets chose the falcon to be their mascot, they broke new ground in the long history of college and university mascots. The falcon was the first collegiate mascot (and a wild creature at that) to perform at sports events, free and untethered. Here is the fascinating history of this unique performing mascot, from the ancient art of falconry to the use of these magnificent birds in reaching out to the public to entertain and to educate."--Publisher's description.