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
Descriptors:
Subject Categories:
- Cybernetics