SU364947A1 - CORRELATOR - Google Patents

Description

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The described device relates to specialized means of analog computing equipment designed to obtain the correlation functions of stationary random processes.

In the known correlators, which work on the principle of decomposing the correlation function in a series of orthogonal functions, the decomposition coefficients are obtained using the multiplication and averaging units.

In the proposed device, the simplification of the scheme is achieved by eliminating these blocks. It is used (Principles for the construction of a polar correlator).

The block diagram of the correlator is shown in the drawing.

The device contains an orthogonal filter with cells / o-In, two generators 2 and 3 auxiliary "random signals with a uniform distribution at a given interval; channel sign circuits 4 (, - 4п, additional sign circuit 5 with summing resistors at the inputs; double-winding polarized relays of RP 6o type - 6 p with intermediate position; resistors 7 and 8, capacitors 9; adder 10; mode switch J1, channel potentiometers settings} 2, -12p.

The correlation function is approximated by a finite number of members of an infinite number of

..

(1) i i

where FCO - p d orthonormal

functions;

Y Y (O-fgGO - decomposition coefficient;

FGSO-voltage at the output of the / - filter cell when applying to its input the implementation of the investigated random process. Based on the principles of the public method for obtaining a correlation function, it is known that

ai AB (2P-l), (2)

where A is const and B is const;

P is the probability of the coincidence of the sign functions formed by the difference of the output signals of the filter cells and the first auxiliary signal and the difference of the input signal and the second output signal.

The framework consists in applying the principles of the polar method of determining the correlation function to find the decomposition coefficients of the correlation function in a series of orthogonal functions.

The scheme works as follows.