Accession Number:

AD0741146

Title:

Sequential Decoding of Time-Varying Convolutional Codes.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s):

Report Date:

1971-12-01

Pagination or Media Count:

72.0

Abstract:

A discussion of convolutional encoding and sequential decoding is given as background for the experimental phase of the research. A modified stack algorithm is programmed to simulate a sequential decoder for use in the study of time-varying convolutional codes. The decoder simulator is used to analyze the structure of codes with the aim of finding a systematic method by which to construct time-varying convolutional codes with good decoding properties. Some difficulties in construction techniques are discussed. Extensive computer simulation comparing decoding performance of time-varying codes to that of fixed codes is reported. The conclusion of these comparisons is that the time-varying codes studied thus far are of theoretical interest only. Author

Subject Categories:

  • Cybernetics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE