Communications systems research - Propagation studies
Two stochastic approximation procedures for identifying linear systems
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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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Communications systems research - Information processing
Digital filtering of random sequences, and maximum likelihood symbol synchronization for binary systems
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Communications systems research - Data compression techniques
Estimating proportions in mixture of two normal distributions using quantiles, and epsilon entropy of Gaussian processes
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Synchronization experiment for a time division multiple access satellite communication system
Doppler compensation for maintaining signal synchronization of time division multiple access
Allen, W. K.↗
Apollo communications systems - Lunar multipath signal characteristics
Radio signal characteristics due to lunar multipaths when lunar module in orbit around moon
Belles, H. W.↗
A general formulation of linear feedback communication systems with solutions.
Optimum linear feedback code for additive noise systems with average power constraint on transmitter to increase channel capacity
Butman, S.↗
COPTRAN - A method of optimum communication systems design
Single set of mathematical expressions describes system cost and probability of error of data transmission in terms of four basic parameters in the link equation. A Lagrange multiplier sets up equations whose solutions yield the optimum values for system design considerations and weight and cost values.
Brinkman, K. L.↗
Apollo communications system. Task E-59B - MSFTP-2 bit synchronizer performance analysis
Mathematical model for predicting performance degradation of MSFTP-2 bit synchronizer used in MSFN
Belles, H. W.↗
Feasibility model of an advanced crossed-field amplifier for space communication systems
Feasibility model of cross field amplifier for use in amplitude or frequency modulation transmitters
Bernstein, G.↗
Apollo communication systems support, task 5 - Lateral p-n-p design optimization Final report
Design optimization of lateral p-n-p transistors with minimum processing steps
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Communication System Aspects of High-data Rate Imagery Transmission
Video image data transmission using millimeter wave relay satellites - modulation techniques and frequency bands
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Communications system research
Coding, synchronization, combinatorial, multiple access, propagation, and permutation studies for telecommunications systems
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Multifunction audio digitizer for communications systems
Digitizer accomplishes both N bit pulse code modulation /PCM/ and delta modulation, and provides modulation indicating variable signal gain and variable sidetone. Other features include - low package count, variable clock rate to optimize bandwidth, and easily expanded PCM output.
Monford, L. G., Jr.↗
Voter comparator switch provides fail safe data communications system - A concept
System indicates status of computers and controls operational modes. Two matrices are used - one relating to permissible system states, the other relating to requested system states. Concept is useful to designers of digital data transmission systems and time shared computer systems.
Koczela, L. J.↗
Communications systems research
Investigating digital techniques, telemetry systems, and genetic code inversion
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Experimental data bus communications system Final report
High speed data transmission system for remote data acquisition using data bus
Weisenbloom, V.↗
Satellite communication system and method Patent
Earth satellite relay station for frequency multiplexed voice transmission
Darcey, R. J.↗