Accession Number : AD0721228

Title :   Analog Coding.

Descriptive Note : Final technical rept. 19 Aug 68-15 Aug 70,

Corporate Author : SIGNATRON INC LEXINGTON MASS

Personal Author(s) : Bussgang,Julian J. ; Gish,Herbert

Report Date : MAR 1971

Pagination or Media Count : 110

Abstract : The report is concerned with a systematic approach to the development and understanding of nonlinear modulation techniques. Rate distortion theory is used as the basis of determining the potential improvement which is possible by efficient utilization of available bandwidth. It is shown that the performance of a typical communication link could be improved by orders of magnitude through proper modulator/demodulator design. The performance of modulation techniques are evaluated and are compared with applicable bounds. The technique of minimizing the upper bound on the distortion is applied to establish what is the optimum modulator within the class of a certain structure. Further investigation in this area is recommended. Results indicate that to achieve theoretically attainable performance, the modulator must not only be nonlinear but must also make efficient use of memory. (Author)

Descriptors :   (*CODING, ANALOG SYSTEMS), INFORMATION THEORY, DATA TRANSMISSION SYSTEMS, TRANSMITTER RECEIVERS, WHITE NOISE, PROBABILITY, ERRORS, PROBABILITY DENSITY FUNCTIONS, DIFFERENTIAL EQUATIONS, SET THEORY, COMPUTER PROGRAMS

Subject Categories : Cybernetics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE