SU1367129A1 - Random signal generator - Google Patents

Abstract

The invention relates to radio engineering and communication, and extends the ranges of independent probability density adjustments and coefficients. correlation. The generator contains a pseudo-random pulse sequence generator 1, a controlled 2 clock pulse generator, a tunable digital filter (PCF) 3, memory blocks (BP) 4.8.10, DAL 5, a low-pass filter 6, a probability density meter 7, and a block 9 comparisons. The code sequences generated by the generator 1 are fed to the PCF 3. The controlled generator 2 clocks these sequences at random intervals. BP 4 adjusts coef. the correlation of the output signal of the PCF 3. The signal converted by the DAC 5 and filter 6 is fed to the device output and to the probability density meter 7. Formed by them a sequence of codes, respectively. the histogram of probability density is entered in BP 8 and then compared with the required probability density coming from BP 10. If the codes are controlled by generator 2, the clocking interval is changed to ensure that the codes are equal. 1 il. from € (L

Description

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The invention relates to radio engineering and communications, measurement technology and can be used to simulate random processes with the adjustment of statistical parameters in testing systems for various purposes.

The purpose of the invention is the expansion of independent adjustments of the density and coefficient of corpusons

probabilities

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The drawing shows a structural electrical circuit of a random signal generator.

The random signal generator contains a 1 pseudo-random pulse sequence generator, a 2-clock controlled pulse generator tunable digital filter 3, a first memory block 4, a digital-analog converter (DAC) 5, a low-pass filter 6 (LPF), a probability density meter 7 ( IPV), the third

a memory unit 8, a comparison unit 9, a second memory unit 10.

The random signal generator works as follows.

A pseudo-random pulse sequence generator 1 generates a sequence of codes that are fed to the input of a tunable digital filter 3, and the clocking is performed by a controlled clock generator 2,. forming a sequence of pulses at random intervals, but with a constant mean frequency of their following.

The correlation properties of the tunable digital filter are determined by the first memory block 4, which, according to the external address, adjusts the correlation coefficient of the output signal of the tunable digital filter.

The signal converted into analog form of a DAC 5 through the LPF 6 is fed to the input of the IPR 7, from the output of which a sequence of codes corresponding to the histogram of probability density is entered into the third memory block 8. Upon completion of the process of writing codes to the third memory block, from the output of the IPV 7 to the comparison block 9, a resolution impulse is received for matching the code corresponding to the required probability of the random signal which is entered into the second block

memory and is regulated by an external signal at the address input of the second memory block. .

If the compared codes are not equal to each other, then from the output of the comparator unit a control signal is sent to the controlled generator of 2 clock pulses, which changes the clock interval until equality of the codes determined by the required probability density is reached.

Claims (1)

U Formula of invention 0 five 0 five 0 five 0 five A random signal generator containing a pseudo-random pulse sequence generator, a comparison unit, a digital-analog converter, characterized in that, in order to spread the ranges of independent adjustments of the probability density and correlation coefficient, a sequentially connected controlled clock pulse generator and a rearranged digital signal are introduced into it the filter, the information input of which is connected to the output of a pseudo-random pulse sequence generator, the first memory block, the output to second is connected to the control input of a tunable digital filter, a second memory block, the output of which is connected to the first input of the comparison unit, a low-pass filter connected in series, a probability density meter, and a third memory block whose input is connected to the second input of the comparison unit the output of the tunable digital filter is connected to the address inputs of the digital-analog converter, the second and third memory blocks, the output of the digital-analog converter is connected to the input of the lower filter their frequencies, the output of the resolution pulse of the probability density meter is connected to the enable input of the comparator unit, the output of which is connected to the control input of the controlled clock generator, the output of which is connected to the clock input of the pseudo-random pulse sequence generator, the address input of the first memory block is input Correlation Coefficient of the Random Signal Generator 1367129 The catch, the address input of the second block of the random signal park, and the output of the memory is the input of the low-pass filter control signal, which is the output of the probability density generated by the random signal generator.