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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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An ENCODE and DECODE facility, a subroutine added to a FORTRAN 4 library, allows alphanumeric data to be transfered to or from an area in memory rather than to or from external input/output devices. A buffer storage array allows the operations on the data prior to writing.
Low-rate command data link performance, serial orthogonal decoder analysis, and optimal codes and strong converse for transmission over noisy memoryless channels
Reliability behavior of information transmission between transmitter-receiver pair in network of erasure channels without decoding and recoding at nodes
Error bounds for orthogonal signals in additive white Gaussian noise channels for class of generalized decision strategies permitting variable-size list decoding
Algebraic and sequential coding-decoding method for data communication rates up to capacity of discrete memoryless channel, discussing error probabilities
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.
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.
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.
Upper and lower bounds of probability of error derived for optimum decoders using convolutional codes
Sequential decoding algorithms and flow charts for convolutional coding techniques
Bit error probability after decoding for binary perfect single error correcting codes
Digital simulation of linear filter, investigating noise and rounding errors effects on decoding signals from lunar and interplanetary probes
Digital PCM telemetry link coding techniques, discussing encoding-decoding complexity, and concatenated block scheme for channel
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.
Convolutional coding techniques including constructing inverses, algorithms, and code comparing for sequential decoding
Description of error correcting methods for use with digital data computers and apparatus for encoding and decoding digital data
Viterbi algorithm for decoding convolutional codes for space channel application