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Signal statistical survey

A signal and input signal technology, applied in the field of determining the statistical characteristics of the signal, can solve the problem of not being able to detect the nonlinear correlation of the signal

Inactive Publication Date: 2004-05-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Non-linear correlations in these signals cannot be detected with standard correlation techniques

Method used

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  • Signal statistical survey
  • Signal statistical survey
  • Signal statistical survey

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Embodiment Construction

[0029] refer to figure 1 , the figure represents a random number generator using a signal analysis device according to the invention.

[0030] The random number generator includes a physical random signal source (PRS) that generates a hashed output signal x(t). exist figure 2 A typical waveform of this signal x(t) is shown in each of a) and 2b).

[0031] The signal x(t) is provided to an analog-to-digital converter (ADC), which also receives sampling pulses from a sampling pulse generator (SPG). The miscellaneous signal x(t) is sampled by a sampler (SMP) at intervals consistent with the period between sample pulses and each analog output is provided to an amplitude quantizer (QUA). The quantizer generates J different quantization levels compared to the analog input samples. At the output (OP), based on the analog sample level, a digital level number is generated.

[0032] Thus, at intervals corresponding to the period between sampling pulses, the random number generator ...

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Abstract

A signal can be analysed to determine statistical characteristics indicative of, for example, the predictability or time reversibility of the signal. The signal is examined to locate events corresponding to the crossing of predetermined levels with predetermined slopes. Multiple versions of the signal are combined, the versions being shifted with respect to each other by amounts corresponding to the spacings of the detected events. The shape of the resulting representation provides statistical information regarding the signal.

Description

technical field [0001] The present invention relates to methods and apparatus for determining statistical properties of signals, and properties of signals which are particularly, but not exclusively, suitable for continuous-time random or mixed or irregular properties. Background technique [0002] For example, there are many situations in which the statistical properties of a signal need to be analyzed for the purpose of signal classification, or to monitor or predict signal properties. One example of the use of such a determination is for example random number generation in cryptography as will be described in detail below. Random or mixed noise signals can be applied to a digitizer that samples the signal at predetermined sampling intervals and outputs a digital representation of the signal consisting of random numbers. For efficiency, the sampling interval should be short. However, short sampling may result in random numbers that are not statistically independent of ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09C1/00G06G7/14
CPCG06G7/14
Inventor W·J·沙诺夫斯基
Owner MITSUBISHI ELECTRIC CORP
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