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Method and apparatus for decoding compatible convolutional codesThis invention relates to learning decoders for decoding compatible convolutional codes. The decoder decodes signals which have been encoded by a convolutional coder and allows performance near the theoretical limit of performance for coded data systems. The decoder includes a sub-bit shift register wherein the received sub-bits are entered after regeneration and shifted in synchronization with a clock signal recovered from the received sub-bit stream. The received sub-bits are processed by a sub-bit decision circuit, entered into a sub-bit shift register, decoded by a decision circuit, entered into a data shift register, and updated to reduce data errors. The bit decision circuit utilizes stored sub-bits and stored data bits to determine subsequent data-bits. Data errors are reduced by using at least one up-date circuit.
Document ID
19740024485
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Doland, G. D. (Lockheed Electron. Co. Houston, Tex., United States)
Date Acquired
September 3, 2013
Publication Date
August 20, 1974
Subject Category
Structural Mechanics
Accession Number
74N32598
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-3,831,142|NASA-CASE-MSC-14070-1
Patent Application
US-PATENT-APPL-SN-266940

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