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Pseudo-atmospheric noise generator with control of temporal characteristics

  • US 4,375,620 A
  • Filed: 12/15/1980
  • Issued: 03/01/1983
  • Est. Priority Date: 12/15/1980
  • Status: Expired due to Fees
First Claim
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1. An improved pseudo-atmospheric noise generator for producing noise in the VLF/LF spectrum with known amplitude probability distributions while controlling the temporal characteristics of the impulses comprising:

  • a plurality of pseudo-random bit generators having amplitude probability distribution outputs;

    means coupled to receive the outputs from the pseudo-random bit generators for storing and selecting the outputs from the pseudo-random bit generators;

    means coupled to the storing and selecting means for providing distribution of bursts of pulses representative of geographical temporal probability distributions for regional storms;

    means coupled to the distribution providing means for converting digital pulses to analog signals of the random amplitude and distribution as determined by the distribution providing means;

    a Gaussian noise source; and

    means coupled to the analog signal converting means and the Gaussian noise source for summing the Gaussian noise signals and the analog signals in a selective ratio to provide the desired pseudo-random atmospheric noise signal.

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