SU364946A1 - MULTICHANNEL CORRELATOR - Google Patents

Description

one

The described device relates to computing technology designed to investigate random processes.

The well-known correlator containing two groups of keys is complex.

The purpose of the invention is to simplify the known correlator by using the interconnection of the input source through an amplifier, a single key of the first group and a RAM memory with the input of a multiplying device.

The block diagram of the multichannel correlator is shown on the drawing, where it is indicated: / - ring distributor; 2 - clock pulse generator; 3 - cells of the ring distributor; 4 - key of the first cell; 5 - keys of the second group; 6 - memory; 7 - multiplying device; 8 — averaging device; 9 is a recording device and 10 is an amplifier.

The use of amplifier 10 made it possible to significantly extend the dynamic range of the correlator, and the exclusion of the first group of keys simplified the correlator circuit and significantly improve the accuracy of its operation.

The correlator input through amplifier 10 is connected to one input of a multiplying device 7 and an input of switch 4, the output of which through memory 6 is connected to the first input of multiplying

the device 7, and the control input of the key 4 is connected to the output of the first cell 3 of the distributor 1. The output of the multiplying device 7 is connected to the inputs of all the keys 5, the control inputs of which are connected to the outputs of the corresponding cells 3 of the distributor /. The output of each key 5 is connected through a corresponding averaging device 8 to a recording device 9.

The proposed correlator works as follows.

During the operation of the ring distributor / from the output of the first cell 3, the impulse of the voltage is supplied only to the control input of the key 4 of the first cell, the voltage pulses from the outputs of the cells 3 (starting from the second) are sent to the control inputs of the corresponding keys 5. When a pulse is received the output of the first cell 3 of the distributor 1 opens the key 4, through which the amplified input signal is fed to the input of the memory 6. The signal from the output of the memory 6, delayed relative to the input, is fed to one of the inputs of the multiplying device, and its second input The current value of the amplified input signal is continuously supplied.

Consequently, a signal is removed from the output of the multiplying device 7, which is equal to the product of the delayed and forward (current) values of the input signals.

When a pulse appears in the second cell 3 of the distributor I, the first key 5 opens. From the output of the multiplying device 7, a signal equal to the product of the current value and the input signals delayed by one clock cycle is transmitted through the open first key 5 to the first averaging device 8 during pulse duration at the cell output 3.

When a pulse appears in the third distributor cell 3 / opens the second key 5. From the output of the multiplying device 7, a signal equal to the product of the current value and the input signal delayed by the time of two cycles of input signals is transmitted through the open second key 5 to the second averaging device 8.

During the subsequent operation of the distributor 3 cells / s, the output of the multiplying device 7, alternately opening keys 5 are outputted by multiplying the input signal by its delayed values, which are fed to the corresponding averaging devices 8, by a time proportional to the discrete values of the ring commutator cycle.

At the end of one cycle of operation of the ring distributor, in the first cell 3 a pulse appears again, which leads to the memorization of the new current value of the input signal, and the subsequent work cycle repeats.

Upon expiration of the analysis time required to calculate the correlation function with a given accuracy, a signal is taken from the outputs of averaging devices, the value of which is proportional to the ordinates of the correlation function with discrete arguments of the argument times the ring correlator, which is recorded by the recording device.

The number of determined ordinates of the correlation function is determined by the number of cells 3 of the distributor /, and the frequency range in which the random process is studied depends on the frequency of the clock pulse generator 2,

The frequency range (from infra-low to high-frequency) of random processes can be easily changed by changing the frequency of the clock generator, and changing the number of detectable points of the correlation function by changing the number of cells in the ring distributor.

Subject invention

A multichannel correlator containing an amplifier, a ring distributor whose outputs are connected through key and averaging devices with a registering device, the main inputs of the keys are connected to the output of a multiplying device, one of the inputs of which is connected to a nominal device that differs from the purpose of simplifying it, in it the output of the amplifier is connected to the Second input of the multiplying device, the input of the storage device is connected to the key, the main input of which is connected to the amplifier, and the control one to you ode first cell annular distributor.

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