Digital gaussian white noise generation system and method of use

Details Digital gaussian white noise generation system and method of use Digital gaussian white noise generation system and method of use

1990-10-25

1991-10-15

Grimm, Siegfried H.

Oscillators

Electrical noise or random wave generator

364717, H03B 2900, H03K 384

Patent

active

050577956

ABSTRACT:
Apparatus for digitally synthesizing substantially Gaussian white noise of an adjustable bandwidth but of substantially constant amplitude. The apparatus comprises a pair of pseudorandom sequence generators, plural delay circuits, plural finite impulse response filters, and a summing network. The pseudorandom sequence generators are made up of a pair of shift registers having a large plurality of output stages to provide a first digital electrical signal representing a pseudorandom number sequence of a long repetition rate at the output stages. The delay circuits are coupled to selected output stages of the pseudorandom sequence generators for providing second respective digital electrical signals representing respective uncorrelated pseudorandom number sequences whose spectrum is a predetermined function, e.g., (sine X)/X. The finite impulse response filters are binary weighted and coupled to respective ones of the delay circuits for cancelling the predetermined function spectrum of the pseudorandom number sequence of the second electrical signals to produce respective first analog electrical signals of substantially uniform amplitude distribution. The summing network is coupled to the finite impulse response filters to sum the first analog electrical signals to produce an analog white noise signal of substantially Gaussian distribution.

REFERENCES:
patent: 3742381 (1973-06-01), Hurd

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