Results 281 to 290 of about 19,459 (310)

On the structure of convolutional and cyclic convolutional codes

IEEE Transactions on Information Theory, 1979
Algebraic convolutional coding theory is considered. It is shown that any convolutional code has a canonical direct decomposition into subcodes and that this decomposition leads in a natural way to a minimal encoder. Considering cyclic convolutional codes, as defined by Piret, an easy application of the general theory yields a canonical direct ...
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On Tail Biting Convolutional Codes

IEEE Transactions on Communications, 1986
In this paper, we introduce generalized tail biting encoding as a means to ameliorate the rate deficiency caused by zero-tail convolutional encoding. This technique provides an important link between quasi-cyclic block and convolutional codes. Optimum and suboptimum decoding algorithms for these codes are described and their performance determined by ...
Howard H. Ma, Jack K. Wolf
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State Spaces of Convolutional Codes

Designs, Codes and Cryptography, 1997
There are various definitions of convolutional codes and each definition leads to a definition of code state space. In the usual definition of a convolutional code generated by a rational encoding matrix the input sequences can be any Laurent series. It is proved that restricting input sequences to be rational functions or restricting output sequences ...
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Woven Convolutional Coding

2003
Woven codes are a family of forward error correction codes. They are constructed by combining several convolutional codes in such a manner that the overall code is again a convolutional code. This is a tutorial paper dealing with design aspects of encoding and decoding woven codes.
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Convolutional Codes and Coherent Sheaves

Applicable Algebra in Engineering, Communication and Computing, 2001
The author uses sheaf theory as a setting for convolutional codes in the sense that coherent sheaves over a projective line play the same role as finite-dimensional linear spaces in the theory of block codes. The author's use of the notion of ``coherent sheaf'' is non-standard, so an appendix is included at the end of the paper to show how the standard
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A search for good convolutional codes to be used in the construction of turbo codes

IEEE Transactions on Communications, 1998
S Benedetto, Roberto Garello, G Montorsi   +2 more
exaly  

Rate-compatible punctured convolutional codes (RCPC codes) and their applications

IEEE Transactions on Communications, 1988
J Hagenauer
exaly  

Convolutional coding

1997
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Decoding of Convolutional Codes Over the Erasure Channel

IEEE Transactions on Information Theory, 2012
Joachim Rosenthal, Roxana Smarandache
exaly  

Constructions of MDS-convolutional codes

IEEE Transactions on Information Theory, 2001
Joachim Rosenthal
exaly