Analysis of decoders for convolutional codes by stochastic sequential machine methods
Convolutional code decoder modeled as autonomous stochastic sequential machine, considering finite Markov chain theory for error probability
Morrissey, T. N., Jr.↗
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Results for “convolutional”
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Study on decoding recovery behavior for convolutional codes
Suboptimum sequential algorithm for recovery decoding errors in convolutional codes, using Hamming distance criterion
Ng, W.-H.↗
Convolutional Coding Techniques for Data Protection
Convolutional coding techniques including constructing inverses, algorithms, and code comparing for sequential decoding
Source record↗
Concatenation of short constraint length convolutional codes
Viterbi algorithm for decoding convolutional codes for space channel application
Erickson, D.↗
Foreshortened convolute section for a pressurized suit Patent
Development of improved convolute section for pressurized suits to provide high degree of mobility in response to minimum of applied torque
Marroni, M. A., Jr.↗
New developments in convolutional encoding and decoding
Convolutional encoding and decoding developments, and applications in deep space communication
Lynch, T. J.↗
Concatenation of convolutional and block codes Final report
Comparison of concatenated and sequential decoding systems and convolutional code structural properties
Odenwalder, J. P.↗
Convolutional coding techniques for data protection
Convolutional coding, sequential coding, subbaud coding, and inverse systems for data protection
Source record↗
The effect of short term exposures to 100 percent oxygen on the fine structure of proximal convoluted tubules
Short term pure oxygen exposure effects on rats proximal convoluted tubular cell structure
Hess, R. T.↗
Catastrophic error propagation and minimum weight codewords in convolutional codes
Catastrophic error propagation and minimum weight codewords in convolutional codes
Rosenberg, W. J.↗
Minimum distance properties of convolutional code words of arbitrary length
Convolutional code words minimum distance- arbitrary length relationship for path memory performance measurement
Huth, G. K.↗
Strengthened lower bound on definite decoding minimum distance for periodic convolutional codes
Binary periodic convolutional codes with lower bound everywhere stronger than Wagner on definite decoding minimum distance
Costello, D. J., Jr.↗
Effect of dietary antioxidant level and oxygen exposure on the fine structure of the proximal convoluted tubules
Dietary antioxidant vitamin level effects on fine structure of proximal convoluted tubules in rats, studying changes due to oxygen toxicity
Hess, R. T.↗
Rate 1/2 convolutional codes with complementary generators
Rate 1/2 convolutional error correcting binary codes with complementary generators, discussing synthesis and search procedure for largest free distance
Bahl, L. R.↗
Nonsystematic convolutional codes for sequential decoding in space applications.
Description of a class of rate 1/2 nonsystematic convolutional codes with the following desirable properties: (1) an undetected decoding error probability verified by simulation to be much smaller than for the best systematic codes of the same constraint length; (2) computation behavior with sequential decoding verified by simulation to be virtually identical to that of the best systematic codes; (3) a ?quick-look-in' feature that permits recovery of the information sequence from the hard-decisioned received data without decoding simply by modulo-two addition of the received sequences; and (4) suitability for encoding by simple circuitry requiring less hardware than encoders for the best systematic codes of the same constraint length. Theoretical analyses are given. These codes have been adopted for use in several forthcoming space missions.
Massey, J. L.↗
A simple branch synchronizer for convolutional decoders.
A simple branch synchronizer for rate 1/3, constraint length five, nonsystematic convolutional code is described. The scheme derives the sync information from the received channel bits, thus avoiding the extra formatting of the sync data at the transmitter and receiver, and increasing the data rate. The synchronizer detects the proper sync bits for both the in-phase and phase ambiguous cases. The design is adaptable to nonsystematic codes of different constraint lengths.
Taqvi, S. Z. H.↗
Real-time minimal bit error probability decoding of convolutional codes
A recursive procedure is derived for decoding of rate R=1/n binary convolutional codes which minimizes the probability of the individual decoding decisions for each information bit subject to the constraint that the decoding delay be limited to Delta branches. This new decoding algorithm is similar to, but somewhat more complex than, the Viterbi decoding algorithm. A real-time, i.e. fixed decoding delay, version of the Viterbi algorithm is also developed and used for comparison to the new algorithm on simulated channels. It is shown that the new algorithm offers advantages over Viterbi decoding in soft-decision applications such as in the inner coding system for concatenated coding.
Lee, L. N.↗
Real-time minimal-bit-error probability decoding of convolutional codes
A recursive procedure is derived for decoding of rate R = 1/n binary convolutional codes which minimizes the probability of the individual decoding decisions for each information bit, subject to the constraint that the decoding delay be limited to Delta branches. This new decoding algorithm is similar to, but somewhat more complex than, the Viterbi decoding algorithm. A real-time, i.e., fixed decoding delay, version of the Viterbi algorithm is also developed and used for comparison to the new algorithm on simulated channels. It is shown that the new algorithm offers advantages over Viterbi decoding in soft-decision applications, such as in the inner coding system for concatenated coding.
Lee, L.-N.↗