SU1520514A2 - Random process generator - Google Patents

Abstract

The invention relates to computing and can be used in modeling random processes, for example, in radio channel modeling devices. The purpose of the invention is to expand the functionality of the generator by providing on-line control of the correlation interval of the generated process. The generator uses a one-step method for generating a normal random process with a given value of the correlation coefficient between samples, in which each successive sample is obtained after comparing two random uniformly distributed numbers, respectively, with the previous process value and with a constant defining the process correlation interval. The goal is achieved by introducing into the scheme a register of an additional comparison scheme. The generator contains a sensor 1 of independent evenly distributed random numbers, a comparison circuit 2, a generator of 3 clock pulses, a delay element 4, the first element AND 5, the second element 6 and a reversible counter 7, a register 8, an additional comparison circuit 9. 1 il.

Description

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The invention relates to computing, can be used in simulating random processes, and is an improvement to the random process generator according to ed. No. 1451688.

The purpose of the invention is to expand the functionality of the generator by ensuring the operative control of the correlation interval of the generated process.

The drawing shows a block diagram of the generator.

Generator Contains sensor 1 independent evenly distributed random numbers, comparison circuit 2, 3 clock pulse generator, delay element 4, first AND 5 element,

second element & b, reverse account

Tick 7, register 8 and additional comparison circuit 9.

The generator works as follows.

When the generator is turned on, the reversible counter 7 is set to some arbitrary initial value, and the constant C is entered in register 8, which specifies the correlation interval of the generated process. Another clock pulse from the generator output. 3 clock pulses are fed to the triggering input of sensor 1 of independent uniformly distributed random numbers, after which the subsequent random numbers generated by it come from the first sensor output to the first input of the digital comparison circuit 2, from the second output of the sensor to the first input of the additional comparison circuit 9 . The second inputs of the indicated comparison circuits 2 and 9 receive, respectively, the number currently in the reversible counter 7 and the number stored in register 8.

If the number entered on the lane. If the input of the comparison circuit 2 is less than the number at its second input, the comparison circuit 2 generates an output signal at the output Less than that affecting the second input of the And 5 element. The first input of this circuit receives a strobe pulse from the clock generator delayed by the delay element 4 . At the same time, if the number supplied to the first input of the additional comparison circuit 9 is less than the number at its second input, a signal arriving at the third inputs appears at the output of this circuit.

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the tone and 5 and 6. As a result, at the output of the element And 5 there is a pulse arriving at the readout input of the reversible counter, as a result of which the number in the counter decreases by one.

Similarly, when the number at the first input of the comparison circuit is greater than the number at its second input, a signal is output at the output of More, impact via AND 6 on the summing input of the reversible counter, if the number supplied to the first input of the additional comparison circuit 9 is less at its second input, and this circuit generates an output signal. Otherwise, the numbers on both inputs of the comparison circuit 2 are the same, the signal on the outputs of the elements And 5 and 6 does not appear, and the number in the reversible counter does not change at this generator operation clock.

The numbers formed in the reversible counter during generator operation form a random sequence, with a large discharge of the reversible counter m obeying the approximate Gaussian distribution with ma2 - 1

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correlation function, and the value of the correlation interval is

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where F is the frequency of the generator 3 clock pulses; k is the constant magnitude of С,

Claims (1)

Claims of the Invention Process Generator auth.St. No. 14516815, which is used to ensure the functionality of the generator by providing control over the correlation interval of the generated process, a register and an additional comparison circuit are added, the first input of which is connected . With the second sensor output of independent uniformly distributed random numbers, the second input is with the information output of the register whose input is the input of the setting of the correlation interval, the output is Less than the additional comparison circuit connected to the third inputs of the first and second th elements I.