Patterns of galvanic skin responses to signal and non-signal stimuli.
Patterns of galvanic skin responses of humans to light-signal and non-signal stimuli
GALVANIC SKIN RESPONSE↗
SEARCH · Engineering Papers
Results for “SIGNAL”
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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System for Improving Signal-to-noise Ratio of a Communication Signal
This invention relates to a system for use in a ground station radio communication receiver for improving the signal-to-noise ratio of weak signals received from distant spacecraft.
Arndt, G. D.↗
Influence of bandwidth restriction on the signal-to-noise performance of a modulated PCM/NRZ signal, part 2 Final report
Influence of bandwidth restriction on signal to noise performance of modulated PCM/NRZ signal
Shehadeh, N. M.↗
Advanced study of video signal processing in low signal to noise environments Quarterly progress report, Oct. 1969 - Jan. 1970
Video signal processing in low signal to noise environments
Carden, F.↗
Signal-to-noise ratio estimating by taking ratio of mean and standard deviation of integrated signal samples Patent
Automatic estimation of signal to noise ratio and other parameters in signal communication systems
Couvillon, L. A., Jr.↗
Advanced study of video signal processing in low signal to noise environments Semiannual progress report, Jun. - Nov. 1970
Video signal processing in low signal to noise environments - bandpass filter in multi-filter phase lock loop
Bowden, R.↗
The application of the analog signal to discrete time interval converter to the signal conditioner power supplies
The Analog Signal to Discrete Time Interval Converter microminiaturized module was utilized to control the signal conditioner power supplies. The multi-loop control provides outstanding static and dynamic performance characteristics, exceeding those generally associated with single-loop regulators. Eight converter boards, each containing three independent dc to dc converter, were built, tested, and delivered.
Schoenfeld, A. D.↗
A user's guide for the signal processing software for image and speech compression developed in the Communications and Signal Processing Laboratory (CSPL), version 1
A complete documentation of the software developed in the Communication and Signal Processing Laboratory (CSPL) during the period of July 1985 to March 1986 is provided. Utility programs and subroutines that were developed for a user-friendly image and speech processing environment are described. Additional programs for data compression of image and speech type signals are included. Also, programs for the zero-memory and block transform quantization in the presence of channel noise are described. Finally, several routines for simulating the perfromance of image compression algorithms are included.
Kumar, P.↗
Procedures for using signals from one sensor as substitutes for signals of another
Long-term monitoring of surface conditions may require a transfer from using data from one satellite sensor to data from a different sensor having different spectral characteristics. Two general procedures for spectral signal substitution are described in this paper, a principal-components procedure and a complete multivariate regression procedure. They are evaluated through a simulation study of five satellite sensors (MSS, TM, AVHRR, CZCS, and HRV). For illustration, they are compared to another recently described procedure for relating AVHRR and MSS signals. The multivariate regression procedure is shown to be best. TM can accurately emulate the other sensors, but they, on the other hand, have difficulty in accurately emulating its shortwave infrared bands (TM5 and TM7).
Suits, G.↗
A Comparison of Signal Enhancement Methods for Extracting Tonal Acoustic Signals
The measurement of pure tone acoustic pressure signals in the presence of masking noise, often generated by mean flow, is a continual problem in the field of passive liner duct acoustics research. In support of the Advanced Subsonic Technology Noise Reduction Program, methods were investigated for conducting measurements of advanced duct liner concepts in harsh, aeroacoustic environments. This report presents the results of a comparison study of three signal extraction methods for acquiring quality acoustic pressure measurements in the presence of broadband noise (used to simulate the effects of mean flow). The performance of each method was compared to a baseline measurement of a pure tone acoustic pressure 3 dB above a uniform, broadband noise background.
Jones, Michael G.↗
Signal detection techniques for a discrete- frequency, phase-coherent pulse frequency modulation /PFM/ telemetry signal.
Signal detection techniques for discrete- frequency, phase-coherent pulse frequency modulation telemetry system, using analog and digital circuits
PULSE FREQUENCY MODULATION /PFM/↗
HRMS Sky Survey Techniques for Separating the Rare Interesting Signal from the Multitude of Background Signals
The NASA High Resolution Microwave Survey (HRMS) Sky Survey component will survey the entire celestial sphere over the microwave frequency band to search for signals of intelligent origin which originate from beyond our solar system.
point spatial filtering↗
Detection of monaural signals as a function of interaural noise correlation and signal frequency.
Interaural correlation effects for masking noise in ear detection of monaural signals
Whitmore, J. K.↗
Advanced study of video signal processing in low signal to noise environments Semiannual progress report, 1967 - 1968
Parameter space calculation for phase lock loop operation in low signal to noise environment
Carden, F. F.↗
The signal-to-noise ratio estimation techniques for PCM signals.
Spectral null from spectral characteristics and statistical properties of PCM signals used to estimate SNR
Sos, J. Y.↗
Blood pressure measuring system for separating and separately recording dc signal and an ac signal Patent
Blood pressure measuring system for separately recording dc and ac pressure signals of Korotkoff sounds
Vick, H. A.↗
Detection, estimation, and modulation theory, Part 3 - Radar-sonar signal processing and Gaussian signals in noise
Book on detection, estimation and modulation theory, Part 3, Gaussian and radar-sonar signals in noise, covering point targets, random process and scatter channels
Van Trees, H. L.↗
Advanced study of video signal processing in low signal to noise environments
A nonlinear analysis of a multifilter phase-lockloop (MPLL) by using the method of harmonic balance is presented. The particular MPLL considered has a low-pass filter and a band-pass filter in parallel. An analytic expression for the relationship between the input signal phase deviation and the phase error is determined for sinusoidal FM in the absence of noise. The expression is used to determine bounds on the proper operating region for the MPLL and to investigate the jump phenomenon previously observed. From these results the proper modulation index, modulating frequency, etc. used for the design of a MPLL are determined. Data for the loop unlock boundary obtained from the theoretical expression are compared to data obtained from analog computer simulations of the MPLL.
Carden, F.↗