FM telemetry and free-flight techniques for aerodynamic measurements in conventional wind tunnels
Frequency modulated system to measure surface pressures on free flight models in conventional wind tunnels
WIND TUNNEL↗
SEARCH · Engineering Papers
Results for “FREQUENCY MODULATION”
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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Comparison of performance of PCM and PFM TELEMETRY systems
Comparison of performance of pulse frequency modulation and pulse code modulation telemetry systems
PFM TELEMETRY↗
IMP D&E /AIMP/ PFM encoding system interface document
Digital data processor, circuit design and fabrication, digital word readout, and interfaces for IMP D and IMP E pulse frequency modulation encoding system
IMP↗
A study of geographical distribution of geomagnetic micropulsations Final report
Geographical distributions of geomagnetic micropulsations continuously recorded on frequency modulated magnetic tape
GEOMAGNETIC MICROPULSATION↗
Deep space FM system, a concept
Deep space frequency modulation system permits transmission of data where the signal deviation is greater than 1/2 the predetection bandwidth. It provides satisfactory performance at great distances or with low signal levels.
Doland, G. D.↗
Evaluation of CSE modem for aircraft terminal multiple access to communications/navigational satellites Final report
Development of experimental linear swept frequency modulator for aircraft satellite communications
Source record↗
Waveform distortion in a maximum-likelihood Darlington detector for M-ary PFM signals
Waveform distortion in maximum likelihood Darlington detector for M-ary pulse frequency modulation signals
Heffernan, P. J.↗
Dual detection system for AIMP PFM data processing
Dual detection system for processing AIMP satellite pulse frequency modulated telemetry data
Karras, T. J.↗
Saturn telemetry data compressor test program Final report
Saturn pulse frequency modulation telemetry data processed through predictor data compressor
Labmeier, C. D.↗
An analysis of the effect of a particular class of PFM on noise inputs
Statistical analysis of pulse frequency modulation systems with white noise input
Chon, Y. T.↗
A hybrid cross-correlation data processing system.
Hybrid cross correlation telemetry data processing system design for decoding pulse frequency modulation
Hammond, W. E.↗
AM baseband telemetry systems. Volume 1 - Factors affecting a common pilot system
Coherent demodulation in single and double side bands with frequency modulation telemetry systems
Simpson, R. S.↗
Boost regulator design and development
Design criteria for pulse and frequency modulated boost regulator
Mc Lyman, W. T.↗
Predicted and actual spacecraft radio frequency interference for PFM telemetry
Predicted and actual spacecraft radio frequency interference for pulse frequency modulation telemetry
Karras, T. J.↗
Threshhold analysis of phase locked loops
Computer technique for predicting threshold in phased locked loops with and without frequency modulation
Osborne, P. W.↗
Advanced study of video signal processing in low signal to noise environments Quarterly progress report, Jun. - Sep. 1969
Probabilistic mathematical click model for optimal click suppressing frequency modulated noise thresholds
Carden, F.↗
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.↗
Tone-activated, remote, alert communication system
Pocket sized transmitter, frequency modulated by crystal derived tones, with integral loop antenna provides police with easy operating alert signal communicator which uses patrol car radio to relay signal. Communication channels are time shared by several patrol units.
Baker, C. D.↗