SEARCH · Search NASA
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Cross correlation and autocorrelation functions of nonstationary signals based on optimal approximation of ensemble correlation function for one pair of signals
Improper random process where impulse occurrence times constitutes stationary point process, noting autocorrelation function and spectral density function
Instrumentation techniques and autocorrelation analysis procedures for secondary equatorial electrojet irregularities
Communication systems research in block coding and synchronization, cyclic Hadamard matrixes, range-grated autocorrelation function, and information processing
Ship-motion data indicating that autocorrelation of roll and pitch can be represented by exponential cosine
Energetic particle scattering by laboratory plasmas, deriving expressions for scattering coefficients in terms of electric field autocorrelation function
The set of periodic sequences over a field forms a group-ring algebra in which convolution is the product operation. Decomposition theorems are applied to this ring to aid in finding sequences with an arbitrary, specified autocorrelation function.
Radar observations of mars, with total echo power measured by a radiometer and analyzed into its frequency spectrum by the autocorrelation approach
Eulerian and Lagrangian autocorrelations and energy spectra computations for large-scale atmosphere turbulences
Radio wave propagation in ionosphere using autocorrelation functions of Comstock type to approximate supporting medium
EEG and rhythmical tremor in outstretched upper extremities in man analyzed by autocorrelation and cross correlation
Longitudinal turbulence intensities, autocorrelations, energy spectra and peak energy dissipation frequencies for organic solvents flowing in smooth round tubes
Brown-Twiss stellar interferometer measurement of autocorrelation function for incoherent sources
Generation of possibly nonstationary random process with specified autocorrelation function
Passage of autocorrelation function to frequency spectrum by numerical Fourier transformation
Equatorial ionosphere charged particle composition and ion and electron temperatures using incoherent scattering autocorrelation function
Relationships between delta-T curve and autocorrelation function of pure sine wave recorded on magnetic tape for evaluating time delay errors
Statistical properties of random impulse trains from integral and sigma PFM systems with white noise imput, noting spectral density and autocorrelation function