Accession Number : AD0705618

Title :   SIGNAL DESIGN FOR FAST FADING CHANNELS,

Corporate Author : HAWAII UNIV HONOLULU INFORMATION SCIENCES PROGRAM

Personal Author(s) : Gaarder,N. Thomas

Report Date : 1968

Pagination or Media Count : 54

Abstract : The design of signals for digital communication over fast fading channels is considered; the emphasis is on nonorthogonal signaling schemes. By using a discrete channel model, necessary and sufficient conditions on the transmitted signals are found that make the Bayes optimum receiver independent of the channel parameters. By using a geometric interpretation of the resultant receiver a hueristic design criterion is developed. Then union bounds for particular nonorthogonal signaling schemes are evaluated. Nonorthogonal schemes based on modulation similar to differential-phase-shift-keyed modulation are found to use substantially less bandwidth than equivalent schemes based on generalized frequency-shift-keyed modulation. (Author)

Descriptors :   (*PULSE COMMUNICATIONS, *INFORMATION THEORY), DIGITAL SYSTEMS, DECISION THEORY, FREQUENCY MODULATION, SEQUENCES(MATHEMATICS)

Subject Categories : Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE