The response of hard-limiting band pass limiters to PM signals
Output signal to noise ratio of bandpass limiter calculated for phase modulated signal
Chang, J. C.↗
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Results for “SIGNALS”
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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Hard limiting of three and four sinusoidal signals.
Hard limiting effect on sum of three or four sinusoidal signals noting output amplitudes, signal suppression and negative suppression effect
Sollfrey, W.↗
Latitudinal cutoff of VLF signals in the ionosphere.
Latitudinal cut-off of manmade VLF signals in short path through ionosphere to OGO 2 satellite, noting strong noise following signal cut-off
Helliwell, R. A.↗
Synthesis techniques for a class of SSB-AM-PM signals.
Subcarrier phase modulated single sideband sinusoidal carrier synthesis, discussing signal power ratios, signal efficiency, design sensitivity, etc
Painter, J. H.↗
Signal phase switches offer greater dynamic range
Circuit, placed in the signal path of a closed-loop receiver to modulate telemetered data in the 10-MHz spectrum, improves signal-to-noise ratio by 3 db in a communication receiver. The switch enables bandwidth reduction which reduces noise overload on the following stages, giving the system greater dynamic range.
Crow, R. B.↗
Integrator for on-line measurement of buffet signals
Device determines average rms value of buffet signals by integrating rms signals from strain gages for preselected period of time. System measures average rms value of other transient data, and the upper frequency limit depends on the frequency response of the amplifiers.
Batts, C. N.↗
Lamp modulator provides signal magnitude indication
Lamp modulator provides visible indication of presence and magnitude of an audio signal carrying voice or data. It can be made to reflect signal variations of up to 32 decibels. Lamp life is increased by use of a bypass resistor to prevent filament failure.
Zeman, J. R.↗
On optimal signals for phase-locked loops
Optimum signals for phase locked or delay locked loops determined as function of signal to noise ratio
Layland, J. W.↗
Analysis of a signal processor for an antenna array
Signal processor with ratio-squared predetection combining for adaptive antenna array, discussing radiation patterns for coherent and incoherent signal and noise sources
Bickford, W. J.↗
A review of some results on the design of signals for Gaussian noise and intersymbol interference immunity
Signal design for Gaussian noise and intersymbol interference immunity, discussing bandlimited signals and maximum likelihood detection technique
Simon, M. K.↗
The response of hard-limiting bandpass limiters to PM signals
Hard limiting bandpass limiter output signal to noise ratio in PM signal detection calculated using probability density function
Chang, J. C.↗
Apollo 12 seismic signal - Indication of a deep layer of powder
Seismic signal by Apollo 12 lunar module impact indicating deep layer of powder by signal propagation
Gold, T.↗
Video signal enhancement system with dynamic range compression and modulation index expansion Patent
Video signal enhancement of signal component representing brightness of scene element in low contrast
Wong, R. Y.↗
Effects of band-limiting on the detection of PCM/split-phase signals
Band limiting effects on PCM/split phase signal detection, considering signal to noise ratio degradation
Shehadeh, N. M.↗
Derivative approximation for recursive signal detection
Derivative approximation techniques for recursive signal detection, using computer program for solving optimum and suboptimum processes signal to noise ratio in effectiveness evaluation
Boorstyn, R. R.↗
Signal-to-noise relationships for coaxial systems that heterodyne backscatter from the atmosphere
Signal to noise ratios for coaxial laser radar system heterodyning signal backscattered from atmospheric aerosol
Horrigan, F. A.↗
Comments on 'Effects of band limiting on the detection of binary signals'
Critique of paper on additional signal power for optimum performance of PCM binary signal detection under channel band limiting effect in white noise
Shehadeh, N. M.↗
A study of the power spectral density of an FM signal
Mathematical expressions describe an FM signal modulated by a composite video wave. Three general spectrum equations for FM signals are obtained by using three types of video information.
Deffebach, H. L.↗