A hybrid coding scheme for discrete memoryless channels.
Algebraic and sequential coding-decoding method for data communication rates up to capacity of discrete memoryless channel, discussing error probabilities
Falconer, D. D.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Bimorph piezoelectric device functions as flapper valve
Flapper valve using a bimorph piezoelectric ceramic bender converts an electrical input into a pneumatic output signal capable of operating fluidic logic elements in a decoder and display system.
Van Der Heyden, J.↗
Rapid method for interconversion of binary and decimal numbers
Decoding tree consisting of 40-bit semiconductor read-only memories interconverts binary and decimal numbers 50 to 100 times faster than current methods. Decimal-to-binary conversion algorithm is based on a divided-by-2 iterative equation, binary-to-decimal conversion algorithm utilizes multiplied-by-2 iterative equation.
Lim, R. S.↗
Improved convolutional coding
Convolutional coding, used to upgrade digital data transmission under adverse signal conditions, has been improved by a method which ensures data transitions, permitting bit synchronizer operation at lower signal levels. Method also increases decoding ability by removing ambiguous condition.
Doland, G. D.↗
Error mechanisms for convolutional codes
Upper and lower bounds of probability of error derived for optimum decoders using convolutional codes
Bucher, E. A.↗
Convolutional coding techniques for data protection Quarterly progress report, 16 Nov. 1969 - 15 Feb. 1970
Sequential decoding algorithms and flow charts for convolutional coding techniques
Chang, J.↗
Exact determination of probability of bit error for perfect single error correcting codes
Bit error probability after decoding for binary perfect single error correcting codes
Apple, G. G.↗
Digital filtering of random digits
Digital simulation of linear filter, investigating noise and rounding errors effects on decoding signals from lunar and interplanetary probes
Jennings, G.↗
Coding - A tool for the digital telemetry link
Digital PCM telemetry link coding techniques, discussing encoding-decoding complexity, and concatenated block scheme for channel
Muller, R. M.↗
An improved telemetry system
Transmission of parity bits together with data bits by a rate one half convolutional code of 25-bit constraint length, with sequential decoding of received signal increases quantity and accuracy of data transmitted by pulse code modulated system operating at given power level.
Lumb, D. R.↗
Convolutional Coding Techniques for Data Protection
Convolutional coding techniques including constructing inverses, algorithms, and code comparing for sequential decoding
Source record↗
Error correcting method and apparatus Patent
Description of error correcting methods for use with digital data computers and apparatus for encoding and decoding digital data
Anderson, T. O.↗
Concatenation of short constraint length convolutional codes
Viterbi algorithm for decoding convolutional codes for space channel application
Erickson, D.↗
Coding systems study for high data rate telemetry links
Performance tests of convolutional decoder systems for high data rate telemetry links
Gilhausen, K. S.↗
Concatenation of convolutional and block codes Final report
Comparison of concatenated and sequential decoding systems and convolutional code structural properties
Odenwalder, J. P.↗
A test set for integration of data compression/ error correction encoding techniques. II - Error correction encoding considerations
Error correction coding/decoding techniques integration, discussing convolutional and block coding and Viterbi, Sequential and Threshold decoding algorithms
Cain, J. B.↗
Improved feedback shift register
Design of feedback shift register with three tap feedback decoding scheme is described. Application for obtaining sequence synchronization patterns is examined. Operation of the circuitry is described and drawings of the systems are included.
Perlman, M.↗