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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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Phase-locked loop operation in multipath environment and multipath effect on detection for Mars probe
All digital phase locked loop FM demodulator, and optimum adaptive delta modulator designed for improving space communication
Performance improvement analysis for Apollo unified S band system, including computerized simulation techniques and phase lock loop studies
Threshold extension techniques using impulse noise detection and elimination implemented at phase lock loop demodulator output
Absolute frequency wideband high resolution determination, using frequency synthesizer as phase locked loop local oscillator
Delta modulation threshold extension technique for phase lock loop FM demodulator
Coherent receiver as hybrid carrier tracking loop consisting of standard phase locked and modified Costas loop
Program studies and designs combline filters and analyzes their effectiveness in improving TV quality. Signal tracking methods are improved. Combline phase-lock loop provides significant sensitivity improvement above and below threshold.
Design, development, and fabrication of 30 watt, high efficiency FM transmitter by utilizing phase lock techniques
Using phase lock techniques to study electrical and magnetic properties of metal superconductor Josephson junctions
Linear modulator, demodulator, and phase locked loops breadboard test procedures and results
Design, operation, and alignment of single channel breadboard modulator, demodulator, and phase locked loops for double sideband signals
Phase locked demodulator with bandwidth switching amplifier circuit
Video signal processing in low signal to noise environments - bandpass filter in multi-filter phase lock loop
Equations to determine tracking performance for second order, phase locked loop used for subcarrier synchronization on digital command system
Phase-coherent communication systems with phase locked loops for data detector synchronization, calculating noisy timing effects on detection efficiency
Fokker-Planck boundary value solutions to transient phase error response of nonlinear phase locked tracking systems