SU1674118A1 - Device for monitoring random number generator - Google Patents

Abstract

The invention can be used in systems designed to simulate and evaluate the quality of discrete communication channels. The purpose of the invention is to reduce hardware costs and reduce failure detection time. The device contains 1 random number generator, trigger blocks 4, comparison blocks 10, 13, EXCLUSIVE OR 12 element, counter 6, trigger 8, synchronizer 3. The device uses a method for evaluating the quality of sequences of evenly and normally distributed pseudo-random binary numbers based on spectra tracking binary numbers and estimates of deviations from these spectra. 1 il.

Description

The invention relates to computing and is intended to control sequences of pseudo-random multi-bit binary numbers generated by hardware, and can be used in systems designed to simulate and evaluate the quality of discrete communication channels.

The purpose of the invention is to reduce hardware costs and reduce failure detection time.

The drawing shows a block diagram of the device

The device contains a generator of 1 random numbers, an input 2 assignments of a distribution type, a synchronizer 3, a block 4 of flip-flops, an input 5 of setting to initial state, a counter 6, an output 7 of the number of identical numbers formed, a trigger 8, an output 9 of fault signs, a block 10 of comparison, output 11 of random sequence, EXCLUSIVE OR element 12. Comparison unit 13 (binary numbers), threshold setting input 14, output 15 sync pulses.

The device works as follows.

At the input 5 of the device, a signal is set which determines the type of distribution — normal or uniform. Comparison unit 10 compares five-bit binary numbers from the output of generator 1 and from the output of block 4 of flip-flops. If the binary numbers are unequal (more or less), one of the outputs is More or Less than the comparison block 10 produces signals of a logical unit that are fed to the first and second inputs of the EXCLUSIVE OR 12 element. At the output of the EXCLUSIVE OR 12 element, a signal of the logical unit is generated, which goes to input block triggers 4 and writes to it the new value of the binary number generated by the generator 1. In addition, the signal of the logical unit from the output of the element EXCLUSIVE OR 12

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Claims (1)

enters the input of counter 6 and resets its contents. Thus, a binary number is recorded in the block of triggers A, if it differs from the previously recorded one generated by generator 1, and counter 6 starts a new cycle of counting identical binary numbers, going continuously one after the other. If the compared binary numbers are not equal, the comparison unit 10 generates a signal of a logical unit that is fed to the input of counter 6. Counter 6 counts the number of identical binary numbers that go continuously one after the other, and provides information to the output 7 of the device and to the input of the comparison unit 13. Comparison unit 13 compares the binary number coming from the output of counter 6 with the binary number coming from the input 14 of the device. If the binary number coming from counter 6 is greater than the binary number coming from the device input 14, then the output of comparison unit 13 generates a signal of the logical unit which is fed to the trigger trigger 8. The trigger 8 synchronizes this signal and sets the output of the logical unit as well at the output , which reports a failure and prohibits the formation of clock pulses at the output of the synchronizer 3. After the signal of the logical unit is applied to the device input 5, the contents of the block of triggers 4 are compared, 6 and trigger 8. After that, the device can again start generating a sequence of pseudo-random binary numbers. Apparatus of the Invention A device for controlling a random number generator, comprising a synchronizer, a trigger block, a trigger, a counter, the installation inputs in the trigger block O and a trigger are connected to the installation input in the initial state of the device, the forward trigger output is a sign output Compiled by V. Orlov Editor M. Nedoluzhenko Tehred M. Morgental the device's failure, the first sync mash output is an output for connecting a monitored random number to the clock input, which is different in that, in order to reduce hardware costs and shorten the failure detection time, it contains two comparison units and the EXCLUSIVE OR element, and block information input the flip-flops are connected to the first information input of the first comparison unit, and is the information input of the device for connecting to the output of a controlled random number generator, the information output of the trigger block is connected to the second information input of the first comparison block, the Outputs More and Less of which are connected respectively to the first and second inputs of the element EXCLUSIVE OR. the output of which is connected to the clock input of the trigger unit and the installation input to the initial state of the counter, the information output of which is connected to the first information input of the second comparison unit and is the output of the number of generated identical device numbers, and the zeroing input is connected to the installation input to the initial state of the device second the information input of the second comparison unit is the input of the device threshold setting, the output More than the second comparison unit is connected to the D input of the trigger, the direct output of which is connected to the input synchronizer stop, the second synchronizer output is connected to the synchronous input of the first comparison unit, the output Equal to which is connected to the counter input of the counter, the third synchronizer output is connected to the synchronous input of the second comparator unit, the fourth output of the synchronizer is connected to the synchronous input of the trigger and is the clock output of the device. Proofreader T. Malets