SU646342A1 - Correlator - Google Patents

Description

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CORRELATOR 3 is a noise-resistant estimation of signal-safety parameters only in the presence of additive white noise; - with corrected noise, this corrector is non-optic in the sense of damping the maximum signal-to-interference ratio. The chain of the invention is to improve the accuracy, i.e., the creation of a device that allows to obtain an optimum (in the sense of maximum signal-to-interference ratio) correlation function when processing an additive mixture of signals and correlated diadnotational noise. The delivered circuit is achieved by additionally inserting a dividing unit, a fifth multiplication unit and a third integrator unit connected in series, a third memory unit, a quad unit, the output of which is connected to the first input of the dividing unit, the second input of which is connected to the output of the second the memory unit, and the output of the division unit is connected to the second input of the fourth multiplication unit, the first I / O unit of the fifth multiplication unit is connected to the output of the first Wopsch function generator, the second one is a waste input of the correlator, the output of the fifth unit and the multiplication is connected to the input of the third integrator block. For dyadia-stationary processes, the optimal correlation function is formed according to the equation T Bop, (C) | tion T (r) -s (t © t:) dt ;, (1) about where fcon T {tr) is found from T (2 V about where CE) -impulse filter characteristic; tj (. (t) -input useful signaling; -implementation of korrepirovannogo normal noise (O and Sh-PS gU-additive mixture; R (t) -Koppe optsionnaya function p b)) The drawing shows the functional diagram of the device of the day of correlation function The device for obtaining the multiplex function contains five multiplication blocks 1,2,3,4,5, three integrator blocks 6,7,8, three memory blocks 9, 10 11, two Walsh function generators 12, 2 13, block Dependype .14, quad block 15, adder 16, the output of which is the output of the device, control unit 17. Generator 12, starting up the block control 17, develops the Walsh functions that arrive at the first inputs of the rulers of multipliers 1, 2, 5. At the second inputs of blocks 1, 2, 5, proceed, the additive mixture 5 (4), the input signal Uc (t) and the implementation of the correlated normal noise p (1). The results of multiplying from the outputs of blocks 1, 2, 5 are the inputs of three blocks of integrators 6, at whose inputs the decomposition coefficients are formed in the orthogonal Fourier Walsh basis of the memory (1): ПТ juc (t) -w (t) dt, Jn (i) -W (Udt) o, t Y) the @ sign means some time shift operation, defined by Walsh function system as an addition modulo two. The outputs of the integrator blocks 6, 7, 8 are connected to the inputs of the memory blocks 9, 10, I. From the output of the memory block 11, decomposition coefficients go to a block of quadrants 15, where a coag is formed}) decomposition factors of the dyadic autocorrelation function the outputs of the memory blocks 10 and quaffines 15 are connected to the inputs of the division block 14, where they are converted into an optimum spectrum in terms of maximum signal-to-noise ratio of the impulse response The outputs of the division block 14 are connected to the first inputs of the multiplication unit 3, where the second inputs are The coefficients of expansion of the random signal Dt from the output of memory block 9 are multiplied from the outputs of block 3 are fed to the first inputs of multiplier 4, and the orthogonal functions from the second generator of the Walsh function 13 arrive at its second inputs. The operation of the generator 13 is also synchronized the control unit 17. The outputs of the multiplication unit 4 are connected to the inputs of the adder 16, at the highest output of the device. Thus, at the output of the device, an optimal (in terms of maximum) signal-to-noise ratio is formed. The correlation function of a diadnotational ergodic random

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The use of new elements and connections favorably distinguishes the proposed device from the indicated prototype, since it allows to obtain the correlation function of dyadostadionary ergodic random signals that is optimal in the sense of maximum signal-to-noise ratio. In contrast to the known devices, this allows the creation of technically easily implemented (on the elements of discrete technology) noise-resistant systems for measuring signal parameters when processing additive mixture signals and correlated interference. The device can also be used for signals that are stationary in the usual sense, although in this case its efficiency will be somewhat lower.

Invention Form

The correlator, which contains the second multiplication units, the first inputs of which are, respectively, the first and second inputs of the correlator, and the second inputs are combined and connected to the output of the first Walsh function generator, whose input is connected to the first I output of the control unit, the second the output of which is connected to the input

the second generator of functions, the output of which is connected to the first input of the third multiplication unit, the output of which is connected to the input of the adder, and the second input of the third multiplication unit is connected to the output of the fourth multiplication unit, the first input of which is connected to the output of the first memory unit, the input of which is connected to the output of the first integrator unit, the input of which is connected to the output of the first multiplication unit, the output of the second multiplication unit through the second integrator unit is connected to the input of the second memory unit, characterized in that In order to improve accuracy, a dividing unit, a fifth multiplication unit and a third integrator block connected in series, a third memory block, a quad block whose output is connected to the first input of the divider whose second input is connected to the output of the second memory block are added to the correlator. and the output of the division unit is connected to the second input of the fourth multiplication unit, the first input of the fifth multiplication unit is connected to the output of the first generator of Walsh functions, the second is the third input of the correlator, the output of the fifth block is intelligent It is connected to the input of the third block of the third integrator block Sources of information taken into account in the examination.,

1.V. N. Zhovinsky, V., F, Arkhobsky. Correlation devices, M., Energiya l974, p. 115, 153.

2. Forward number 231О753 / 24,

cl. (5 06 R 15/34, 1976, according to which a positive decision was made to issue an author's certificate.