Accession Number : ADD010621

Title :   Pseudo-Atmospheric Noise Generator with Control of Temporal Characteristics.

Descriptive Note : Patent,


Personal Author(s) : Singer,P A ; Cernius,R K

Report Date : 01 Mar 1983

Pagination or Media Count : 11

Abstract : An improved psuedo-atmospheric noise generator includes the capability for producing noise in the VLF/LF spectrum with known amplitude probability distributions while controlling the temporal characteristics of the simulated impulses. The outputs from a number of psuedo-random bit generators are selected by a microprocessor in accordance with expected or anticipated atmospheric disturbances from a number of geographical regions. The microprocessor selected outputs are fed to a digital-to-analog converter which feeds the converted signals to a summer. An independent Gaussian noise source is coupled to the summer and the outputs from the Gaussian noise source and the digital-to-analog converter are combined to create a composite psuedo-atmospheric noise signal. The improvement also includes capability for self-testing and set up. (Author)

Descriptors :   *Patents, *Noise generators, *Simulators, Atmospherics, Digital to analog converters, Pseudo random systems, Probability distribution functions, Very low frequency, Gaussian noise, Low frequency, Atmospheric disturbances, Communication equipment, Coupling(Interaction), Test equipment, Conversion, Bandpass filters, Microprocessors, Functions, Spectra, Signals, Amplitude

Subject Categories : Computer Hardware
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE