Pseudo-atmospheric noise generator with control of temporal char

Details Pseudo-atmospheric noise generator with control of temporal char Pseudo-atmospheric noise generator with control of temporal char

1980-12-15

1983-03-01

Grimm, Siegfried H.

Oscillators

Electrical noise or random wave generator

364717, H03B 2900

Patent

active

043756204

ABSTRACT:
An improved pseudo-atmospheric noise generator includes the capability for roducing 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 pseudo-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 pseudo-atmospheric noise signal. The improvement also includes capability for self-testing and set up.

REFERENCES:
patent: 3617925 (1971-11-01), Bensema et al.
patent: 3777278 (1973-12-01), Majeau et al.
patent: 4173000 (1979-10-01), Singer et al.

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