
Accession Number : AD0717599
Title : The Application of Convolutional Codes tothe High Frequency Channel.
Descriptive Note : Thesis,
Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
Personal Author(s) : McCrumb,James Brayton
Report Date : SEP 1970
Pagination or Media Count : 98
Abstract : The HF channel is characterized with regard to frequency selective fading and atmospheric noise under restrictive mathematical assumptions, and compared with measured statistics. Actual channel characteristics are utilized to obtain parameters for choosing appropriate convolutional codes. Short threshold decodable convolutional codes with only a moderate amount of interleaving are shown to be capable of affecting a reduction in the output error probability by at least an order of magnitude, for uncoded error probabilities on the order of 0.02. (Author)
Descriptors : (*INFORMATION THEORY, *DECODING), (*COMMUNICATION AND RADIO SYSTEMS, ATMOSPHERICS), CODING, RADIO INTERFERENCE, HIGH FREQUENCY, PROBABILITY, ERRORS, PROBABILITY DENSITY FUNCTIONS, MATRICES(MATHEMATICS), INTEGRAL EQUATIONS, SEQUENCES(MATHEMATICS), SET THEORY, MULTIPLEXING, THESES
Subject Categories : Cybernetics
Radiofrequency Wave Propagation
Radio Communications
Distribution Statement : APPROVED FOR PUBLIC RELEASE