Accession Number : AD0717599

Title :   The Application of Convolutional Codes to-the 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