Hybrid natural random number generator
First Claim
1. A random signal source comprisingsignal generating means for producing a nondeterministic random-like sequence of signal states occurring at a first rate, andsignal processing means, connected to receive the nondeterministic random-like sequence, for producing an output signal sequence having an even distribution of signal states and uncorrelated occurrences of signal states, said output sequence being produced at a second rate which is a fixed submultiple of said first rate.
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Accused Products
Abstract
A digital processor (16) is disclosed for improving the statistical characteristics of nondeterministic random-like binary sequence. The basic elements of the digital processor are a feedback loop comprising a delay (17) and a signal combiner (18) and a subsampler (19). Maximum performance of the digital processor is achieved when a relatively prime relationship exists between number of cells in the delay (17) and ratio of the original signaling rate to the output signaling rate of the subsampler (19). Mathematical analysis is presented for showing that the digital processor improves both the equidistribution of the binary variable and autocorrelation statistic of output signal over the nondeterministic random-like binary signal. A further improvement in statistical properties is obtained by using two digital processors (116 and 121) in serial fashion.
37 Citations
11 Claims
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1. A random signal source comprising
signal generating means for producing a nondeterministic random-like sequence of signal states occurring at a first rate, and signal processing means, connected to receive the nondeterministic random-like sequence, for producing an output signal sequence having an even distribution of signal states and uncorrelated occurrences of signal states, said output sequence being produced at a second rate which is a fixed submultiple of said first rate.
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2. A random signal source comprising
signal generating means for producing a nondeterministic random-like binary sequence of signal states at a first rate, and first signal processing means, connected to receive the random-like binary sequence, for producing an output signal sequence having more even equiprobability of signal states than the nondeterministic random-like binary sequence and having its covariance reduced to essentially zero, said output sequence being produced at a second rate which is a fixed submultiple of said first rate.
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7. A random signal generator comprising
noise generating means for producing an analog noise signal, converting means for changing the analog noise signal into a nondeterministic random-like signal sequence having signal states occurring at a first rate, and processing means for producing another nondeterministic random sequence from the nondeterministic random-like signal sequence, the random sequence having a more uniform distribution of signal states and greater independence of signal state occurrence than the nondeterministic random-like signal sequence, said random sequence being produced at a second rate which is a fixed submultiple of said first rate.
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9. A random signal source comprising
signal generating means for producing a nondeterministic random-like sequence of signal states occurring at a first rate, and signal processing means, connected to receive the nondeterministic random-like sequence, for solely producing an output signal sequence at a second rate, said output signal sequence having an even distribution of signal states and uncorrelated occurrences of signal states.
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10. A random signal source comprising
signal generating means for producing a nondeterministic random-like binary sequence of signal states occurring at a first rate, and first signal processing means, connected to receive the nondeterministic random-like binary sequence, for solely producing an output signal sequence at a second rate, said output signal sequence having more even equiprobability of states than the nondeterministic random-like binary sequence and having its covariance reduced to essentially zero.
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11. A random signal generator comprising
noise generating means for producing an analog noise signal, converting means for changing the analog noise signal into a nondeterministic random-like signal sequence having signal states occurring at a first rate, and processing means for solely producing at a second rate another nondeterministic random sequence from the nondeterministic random-like signal sequence, the random sequence having a more uniform distribution of signal states and greater independence of signal state occurrence than the nondeterministic random-like signal sequence.
Specification