RU2677358C1 - Modulator of discrete signal by time position - Google Patents

Abstract

FIELD: radio equipment.

SUBSTANCE: modulator of a discrete signal in the temporary position contains a negative voltage source, an integrator, a comparator, a quantizer, a storage unit, a clock generator, first frequency divider, adder, key, second frequency divider, 2ⁿ-channel Walsh function generator, modulator initial setup input, n-bit memory register, multiplier 2ⁿ-input switch, null-organ, trigger, first additional key, second additional key, additional two-input adder, 2^n-1-circular shift register, controlled inverter.

EFFECT: technical result is to improve the noise immunity of the output signals by reducing the amplitude of the side peaks of their autocorrelation functions.

1 cl, 7 dwg, 1 tbl

Description

The invention relates to radio engineering and can be used to generate discrete signals, modulated by the temporary position, in communication systems and telecontrol.

A modulator is known that contains a quantizer, a storage device, a comparison device, an integrator, a negative voltage source, a clock, a first frequency divider, a key, a second frequency divider, an adder and a Walsh function generator (see Harmut H.F. Information transfer by orthogonal functions. - M.: Communication, 1975, p. 132, Fig. 3.27).

However, the output signals generated by this device have low noise immunity, as they have poor correlation properties - the amplitudes of the side peaks of the autocorrelation functions of these signals are close to 1.

Also known is a modulator of a discrete signal in a temporary position, comprising a quantizer, a storage unit, a key, an adder, a Walsh function generator, a comparison unit, an integrator, a negative voltage source, a clock pulse generator, first and second frequency dividers, a square wave generator, a counter, a switch, and a multiplier, moreover, a quantizer, a storage unit, a key, an adder, a Walsh function generator are connected in series, the first quantizer input is a modulator input, an output of a storage unit connected to the first input of the comparison unit, the second input of which is connected to the output of the integrator, the first input of which is connected to the output of the negative voltage source, and the output of the comparison unit is connected to the second inputs of the storage unit and integrator, the second key input is connected to the output of the clock generator and the input of the first frequency divider, the output of which is connected to the second input of the adder and the input of the second frequency divider, the output of which is connected to the installation input of the quantizer, with the second input of the counter and the third by the course of the integrator, the output of the adder is connected to the input of the square-wave oscillator and the first input of the counter, the outputs of which are connected respectively to the first and second inputs of the switch, the third input of which is connected to the output of the negative voltage source, the output of the Walsh function generator is connected to the first input of the multiplier, the second input of which connected to the output of the switch, the output of the multiplier is the output of the modulator (see USSR copyright certificate for invention No. 1800641, class H04L 27/12 of 08/23/90, published in Bulletin No. 9 of 03/07/93).

However, the output signals generated by this modulator have low noise immunity, as they have poor correlation properties — large amplitudes of the side peaks of the autocorrelation functions of these signals.

Closest to the technical nature of the present invention is a modulator of a discrete signal in a temporary position, comprising a quantizer, a storage unit, a key, an adder, a Wodsh function generator, a comparison unit, an integrator, a negative voltage source, a clock generator, the first and second frequency dividers, a generator square wave, a counter, a switch, a multiplier, the input of the modulator initial installation and n-bit memory register (where 2 ⁿ - number of functions generated by Walsh generator functions ), and the quantizer, the storage unit, the key, the adder, the Walsh function generator are connected in series, the first input of the quantizer is the input of the modulator, the output of the storage unit is connected to the first input of the comparison unit, the second input of which is connected to the output of the integrator, the first input of which is connected to the output of the source negative voltage, and the output of the comparison unit is connected to the second inputs of the storage unit and the integrator, the second key input is connected to the output of the clock generator and the input of the first divider frequency, the output of which is connected to the second input of the adder and the input of the second frequency divider, the output of which is connected to the installation input of the quantizer, the second input of the counter and the third input of the integrator, the output of the adder is connected to the input of the square wave generator and the first input of the counter, the outputs of which are connected respectively to the first and the second inputs of the switch, the third input of which is connected to the output of the negative voltage source, the output of the Walsh function generator is connected to the first input of the multiplier, the second input which is connected to the output of the switch, the output of the multiplier is the output of the modulator, the output of the second frequency divider is connected to the enable input of the stored code of the memory register, the outputs of the bits of the memory register are connected to the same inputs of the bits of the counter, the input of the initial installation of the modulator is connected to the installation input of the quantizer, the second input of the counter , the third input of the integrator and the input of the permission to issue the stored code of the memory register (see patent for invention No. 2393640 according to application No. 2008149993/09 dated 12/17/2008, class. H04L 27/12, published in Bulletin No. 18 dated 06/27/2010).

The aim of the invention is to increase the noise immunity of the output signals by reducing the amplitude of the side peaks of their autocorrelation functions.

This goal is achieved by the fact that in the known modulator of a discrete signal at a temporary position, containing a quantizer, a storage unit, a key, an adder, a comparison unit, an integrator, a negative voltage source, a clock pulse generator, the first and second frequency dividers, a multiplier, the input of the initial installation of the modulator and n-bit memory register (where 2 ⁿ is the number of functions in a modulated system of discrete orthogonal signals), and the quantizer, storage unit, key, adder are connected in series, the first the quantizer input is the modulator input, the output of the storage unit is connected to the first input of the comparison unit, the second input of which is connected to the output of the integrator, the first input of which is connected to the output of the negative voltage source, and the output of the comparison unit is connected to the second inputs of the storage unit and integrator, the second key input connected to the output of the clock generator and the input of the first frequency divider, the output of which is connected to the second input of the adder and the input of the second frequency divider, the output of which is connected It is connected with the quantizer’s installation input and the integrator’s third input, the multiplier’s output is the modulator’s output, the output of the second frequency divider is connected to the enable output of the stored memory register code, the modulator’s initial installation input is connected to the installation of the quantizer, the third integrator’s input and the output of the stored register code memory administered 2 ⁿ - channel Walsh function generator, 2 ⁿ - vhodovy switch 2 ^n-1 - bit cyclic shift register, the zero-body, a trigger, first complementary to Uche, a second additional key, third two-input adder, with the inverter, wherein the outputs 2 ⁿ - channel generator Walsh functions are connected with similar data inputs of the 2 ⁿ - vhodovogo switch discharges outputs n-bit storage register connected to the like input control 2 ⁿ - vhodovogo switch , the output 2 ^{n of the} input switch is connected to the first input of the multiplier, the second input of which is connected to the output of the controlled inverter, the output of the adder is connected to the clock input of 2 ⁿ - channel generator Walsh functions and clock input 2 ^n-1 - bit cyclic shift register, the second output of 2 ⁿ - channel generator of Walsh functions connected to the input of the zero-organ, the output of which is connected to the counting input of the trigger, the direct output of which is connected to the control input of the first additional key, the inverse trigger output is connected to the control input of the second additional key, the outputs of the first and second additional keys are connected to the corresponding information inputs of the additional two-input adder, the output is additional tional two-input adder is connected to the information input of a controlled inverter, a control input coupled to an output significant bit 2 ^n-1 - bit cyclic shift register (2 ^n-1 - 2) - th output 2 ⁿ - channel generator Walsh functions connected to data input the first additional key, (2 ⁿ - 4) - output of the 2 ⁿ - channel generator of Walsh functions is connected to the information input of the second additional key.

In FIG. 1 is a structural diagram of a modulator of a discrete signal in a temporary position; FIG. 2 is a timing diagram of Walsh functions at the outputs of 2 ⁿ - channel generator of Walsh functions, in FIG. 3 is a timing diagram of a system of signals S (i, θ) generated in the proposed modulator, FIG. 4 is a timing diagram illustrating the process of generating the function S (10, θ) in the proposed modulator, FIG. 5 and in FIG. 6 is a view of the autocorrelation functions of an ensemble of discrete orthogonal signals S (i, θ) in the proposed modulator, FIG. 7 - the process of generating the output signal in the proposed modulator in the case of a shift of the function in the temporary position by one element and in the case of the shift of the function in the temporary position by three elements.

The temporal position discrete signal modulator contains a negative voltage source 1, an integrator 2, a comparison unit 3, a quantizer 4, a storage unit 5, a clock generator 6, a first frequency divider 7, an adder 8, a key 9, a second frequency divider 10, 2 ⁿ - channel generator of Walsh functions, input 12 of the initial installation of the modulator, n-bit memory register 13, multiplier 14, 2 ⁿ - input switch 15, zero-organ 16, trigger 17, first additional key 18, second additional key 19, additional two-input adder 20, 2 ^{n- 1} - bit cyclic shift register 21, controlled by inverter 22.

The modulator of the discrete signal in the temporary position works as follows.

во всех сеансах модуляции, что предполагает наличие в n-разрядном регистре 13 памяти двоичного кода «1 0 1 0», представляющего десятичное число 10. При этом в (2^n-1 - 3) - м разряде 2^n-1 - разрядного циклического регистра 21 сдвига записана единица, триггер 17 находится в исходном единичном состоянии.Before the operation of the modulator in the n-bit register 13 of the memory (where 2 ⁿ is the number of outputs of the generator 11 of the Walsh functions), the serial number of the Walsh function is recorded, which will be generated at the output of the 2 ⁿ - input switch 15 during all modulation sessions. For example, when using the signal S (10, θ) to form the modulator, the Walsh function

in all modulation sessions, which implies the presence in the n-bit register 13 of the memory of the binary code "1 0 1 0" representing the decimal number 10. Moreover, in (2 ^n-1 - 3) -th bit 2 ^n-1 - bit cyclic unit 21 of the shift recorded unit, the trigger 17 is in the original single state.

.Before starting the modulator, an impulse is fed to the input 12 of the initial installation of the modulator, which is fed to the input of the permission to issue the stored code of the memory register 13. Since the information outputs of the bits of the memory register 13 are connected to the corresponding control inputs 2 of the ⁿ -input switch 15, the corresponding Walsh function is formed at the output of it during all modulation sessions, for example,

.

At the initial time, the voltage at the output of quantizer 4 is zero, therefore, at the output of the storage unit 5, it is also equal to zero. The voltage at the output of the integrator 2 at the initial time is also equal to zero. Since the inputs of the comparison unit 3 receive the same voltage, equal to zero, an output is generated at the output of the comparison unit 3, which sets the integrator 2 and the storage unit 5 to the initial state.

The input modulating signal (Fig. 7, a) is input to the quantizer 4, which periodically samples the values of the input signal at time instants 0, θ, 2θ, ..., and quantizes them. The number of quantization levels is equal to the number of elements of the Walsh functions (for the case under consideration, let 2 ⁿ = 16) (Fig. 7, b). The obtained voltage is stored for certain periods of time in the storage unit 5 (Fig. 7, c).

At the output of the integrator 2, a positive sawtooth voltage is obtained (Fig. 7, d). The voltage comparison unit 3 generates a pulse at that moment in time when the sawtooth voltage reaches the voltage value at the output of the storage unit 5 (Fig. 7, d). This pulse initializes the circuit of the storage unit 5 and the integrator 2. At the output of the storage unit 5, positive pulses are generated, the duration of which is proportional to the value of the quantized voltage (Fig. 7, c). When these pulses arrive at the first (control) input of the key 9, the key turns out to be open, and the pulses from the clock generator 6 (Fig. 7, e) are at the output of the key 9 (Fig. 7, h).

втором случае - сдвиг на три элемента

The frequency divider 7 forms from the pulse sequence from the output of the clock generator 6 a pulse sequence having a much longer period (Fig. 7, g). This sequence of pulses goes through the adder 8 to the clock input 2 of the ⁿ -channel generator 11 of the Walsh functions, generating a certain Walsh function, for example, Wal (3, θ) during all modulation sessions. The pulses from the output of the key 9 through the adder 8 are added to the pulses from the output of the frequency divider 7 immediately after time instants 0, θ, 2θ, ... Since the pulse period from the output of the key 8 is much less than the period of pulses from the output of the frequency divider 7, then the output 2 ⁿ - channel generator 11 Walsh functions formed Walsh function, modulated in phase. Moreover, the phase shift is proportional to the value of the quantized voltage of the input signal received at the output of quantizer 4. For example, if the value of the quantized voltage is 0, then the phase shift is 0. If the value of the quantized voltage is 1, then the phase shift is performed by one element of the Walsh function. If the value of the quantized voltage is 2, then the phase shift is carried out by 2 elements of the Walsh function and so on. In the same way, the phase shift of the signal S (i, θ) is performed at the output of the modulator, while (Fig. 7, k) in the first case, the figure shows a shift by one element

the second case is a shift by three elements

Let us consider in more detail the process of generating signals S (i, θ) in the proposed modulator using the example of the function S (10, θ) for case 2 ⁿ = 16. For simplicity, we assume that in the case under consideration, the time delay or phase shift is 0.

), тактовые импульсы поступают также на тактовый вход 2^n-1 - разрядного циклического регистра 21 сдвига.With the beginning of the arrival of pulses from the output of the adder 8 (Fig. 4, a) to the clock input 2 of the ⁿ -channel generator 11 of the Walsh functions, generating a certain Walsh function (in this case, during all modulation sessions)

), clock pulses also arrive at clock input 2 of the ^n-1 - bit cyclic shift register 21.

The potentials from the direct and inverse outputs of the trigger 17 are supplied to the control inputs of the additional keys 18 and 19. Thus, the first additional key 18 is open, and the second additional key 19 is closed.

A detailed description of the trigger device 17, which is an ordinary T-trigger, is presented in a well-known source (see Fundamentals of discrete ACS and communication technology. Under the general editorship of GF Grinenko - L .: VIKI named after AF Mozhaisky, 1980, p. . 240, Fig. 6.22, Fig. 6.23).

(фиг. 4, в) с (2^n-1 - 2) - го выхода 2ⁿ - канального генератора 11 функций Уолша (то есть, для случая 2ⁿ = 16 с шестого выхода блока 5 формирования функций Уолша) через открытый дополнительный ключ 18 (фиг. 4, д) поступает на первый вход дополнительного двухвходового сумматора 20, а с его выхода - на информационный вход управляемого инвертора 22.In the process of generating signals S (i, θ), the Walsh function

(Fig. 4, c) from the (2 ^n-1 - 2) -th output of the 2 ⁿ -channel generator of 11 Walsh functions (that is, for the case 2 ⁿ = 16 from the sixth output of the Walsh function generation block 5) through an additional public key 18 (Fig. 4, d) is fed to the first input of an additional two-input adder 20, and from its output, to the information input of a controlled inverter 22.

(фиг. 4, б), формируемой на втором выходе 2ⁿ - канального генератора 11 функций Уолша, срабатывает нуль-орган 16. Он вырабатывает импульсы в моменты смены значащей позиции функции

, при переходе от -1 к +1 или при переходе от +1 к -1. Импульсы с выхода нуль-органа 16 изменяют состояние триггера 17, а следовательно, и состояние дополнительных ключей 18 и 19.At the moment of changing the sign of the Walsh function

(Fig. 4, b), formed at the second output 2 of the ⁿ -channel generator 11 of Walsh functions, the zero-organ 16 is triggered. It generates pulses at the moments of the change in the significant position of the function

, in the transition from -1 to +1 or in the transition from +1 to -1. The pulses from the output of the null organ 16 change the state of the trigger 17, and therefore the state of the additional keys 18 and 19.

The null-organ 16 generates a short pulse at its output at times when the signal at its input changes sign from “+” to “-” or from “-” to “+”, which in this case occurs in the middle of the T-period definitions of Walsh functions.

A detailed description of the null-organ device 16 is presented in a well-known source (see Fundamentals of discrete ACS and communication technology. Under the general editorship of GF Grinenko - L .: VIKI named after AF Mozhaisky, 1980, pp. 209-215) .

(фиг. 4, г) с (2ⁿ - 4)-го выхода 2ⁿ - канального генератора 11 функций Уолша (то есть, для случая 2ⁿ = 16 с двенадцатого выхода 2ⁿ - канального генератора 11 функций Уолша) через открытый ключ 19 (фиг. 4, е) поступает на второй вход дополнительного двухвходового сумматора 20, а с его выхода - на информационный вход управляемого инвертора 22.The pulse coming from the output of the zero-organ 16 leads to the fact that the key 18 is closed, and the key 19 is open, and the Walsh function

(Fig. 4d) from the (2 ⁿ - 4) -th output of the 2 ⁿ -channel generator of 11 Walsh functions (that is, for the case 2 ⁿ = 16 from the twelfth output of the 2 ⁿ - channel generator of 11 Walsh functions) through the public key 19 (Fig. 4, f) is fed to the second input of an additional two-input adder 20, and from its output, to the information input of a controlled inverter 22.

At the output of the additional two-input adder 20, the signal shown in FIG. 4 g

With the arrival of the third clock pulse from the output of the adder 8 to the clock input 2 of the ^n-1 -bit cyclic shift register 21, a unit is formed at the output of the highest bit 2 of the ^n-1 -bit cyclic register 21 of the shift (Fig. 4, h) in (2 ^n-1 - 3) -th discharge. This unit is supplied to the control input of the controlled inverter 22, as a result of which the third element of the signal generated at the output of the additional two-input adder 20 and fed to the information input of the controlled inverter 22 is inverted. Since the 2 ^n-1 -bit cyclic shift register 21 is closed into the ring by the feedback circuit and has 2 ^n-1 -bits, then from the indicated point in time, after 2 ^n-1 clock cycles, the unit again forms at the output of the shift register 21 (Fig. 4 , h), and the corresponding element of the signal from the output of the additional two-input adder 20 to the information input of the controlled inverter 22 will also be inverted.

The signal at the output of the controlled inverter 22 (Fig. 4, and) is a mutating (i.e. producing) sequence, which is described as follows:

В результате этого на выходе умножителя 14 формируется дискретная ортогональная функция S(10, θ).The signal generated at the output of the controlled inverter 22 is multiplied in the multiplier 14 by the Wash function

As a result of this, a discrete orthogonal function S (10, θ) is generated at the output of the multiplier 14.

The functions S (i, θ) have a form different from the form of the Walsh functions

In FIG. Figure 4 shows diagrams illustrating the process of generating a discrete orthogonal function S (10, θ) in the proposed modulator.

The diagrams indicate a temporary state:

a) the output of the adder 8, on which clock pulses are generated;

b) the second output 2 ⁿ - channel generator 11 of the Walsh functions, on which the function is formed

c) the sixth output 2 ⁿ - channel generator 11 of Walsh functions, on which the function is formed

d) the twelfth output 2 ⁿ - channel generator of 11 Walsh functions, on which the function is formed

d) the output of the first additional key 18;

e) the output of the second additional key 19;

g) the output of an additional two-input adder 20;

h) the output of the senior bit 2 ^n-1 - bit cyclic shift register 21 shift;

i) the output of the controlled inverter 22;

j) the eleventh output 2 ⁿ - channel generator of 11 Walsh functions, on which the function is formed

j) the output of the multiplier 14, on which the function S (10, θ) is formed.

The signal from the output of the controlled inverter 22 is fed to the input of the multiplier 14 and is multiplied by the Walsh function. At the output of the multiplier 14, a signal is generated, modulated by the temporary position.

и

на фиг. 7, к можно пренебречь (на рисунке они показаны только для объяснения механизма осуществления фазового сдвига функций Уолша и фазового сдвига выходного сигнала).The pulse repetition period from the output of the generator of 6 clock pulses can be chosen so small in comparison with the duration of the elements of the Walsh functions that short elements of the signals

and

in FIG. 7c, it is possible to neglect (in the figure they are shown only to explain the mechanism of the phase shift of the Walsh functions and the phase shift of the output signal).

The system of output signals S (i, θ) generated by the proposed modulator, as well as the system of output signals P (i, θ) generated by the prototype, is orthogonal, as can be easily seen by multiplying any signals of the system and integrating the result of multiplication over a period of time T .

Since the work of the demodulating circuit is based on the same principles as the modulator circuit, the structure of the demodulating circuit necessarily includes correlators or matched filters (see Harmut Kh.F. Information Transmission by Orthogonal Functions. - M .: Communication, 1975, p. 133) .

This leads to high requirements for noise immunity of the output signals of the modulator, and, therefore, to the autocorrelation function of the output signal.

It is known that the autocorrelation function of the signal S (t) is determined by the expression:

where τ is the value of the time shift of the signal.

It can be seen from expression (1) that R (τ) characterizes the degree of connection (correlation) of the signal S (t) with its copy shifted by the value of τ along the time axis.

It is clear that the function R (τ) reaches its maximum at τ = 0, since any signal is completely correlated with itself.

Wherein:

that is, the maximum value of the autocorrelation function is equal to the signal energy (see IS Gonorovsky, Radio Engineering Circuits and Signals. - M.: Soviet Radio, 1971, p. 68).

For the case of signals normalized by energy with E = 1 taken into account, the autocorrelation function of the signal consists of a central peak with amplitude 1 located on the interval (-τ ₀ , τ ₀ ) and side peaks distributed on the intervals (-T, -τ ₀ ) and (τ ₀ , T). The amplitudes of the side peaks take different values, but for signals with good correlation properties they are small, that is, significantly less than the amplitude of the central peak equal to 1 (see Varakin L.E. Communication systems with noise-like signals. - M .: Radio and communication, 1985 , p. 30).

It is easy to verify that since in the proposed modulator, during a time shift, a part of the function (i.e., the output signal) that extends beyond the beginning of the period due to the shift is added on the other side of the function (i.e., the output signal) (see Harmut H.F. Information transfer by orthogonal functions. - M: Communication, 1975, p. 131), then the amplitudes of the side peaks of the autocorrelation functions of signals with a time shift do not change, but only the location of the side peaks relative to the main peak changes.

Signals with lower amplitude side peaks of autocorrelation functions are more noise-resistant.

The values of the side peaks of the autocorrelation function, which are usually less than the main one, depend on the actual used code sequence (in our case, the signal at the modulator output) and are the result of a partial correlation of the code sequence with the same code sequence shifted in time. When such side peaks of the correlation function occur, the ability of the receiver (in our case, the demodulating device) to establish reliable synchronization worsens, since in this case it must distinguish between the main and maximum side peaks of the correlation function (see Dixon R.K. Broadband systems. - M.: Communication, 1979, p. 67).

The autocorrelation function is of the greatest interest in the selection of code sequences to obtain the least probability of establishing false synchronization (see Dikson RK Broadband systems. - M .: Communication, 1979, p. 64).

The correlation properties of the code sequence (output signal) are characterized by the distinguishability index (PR), defined as the difference between the values of the autocorrelation function corresponding to the main and maximum side peaks. Obviously, the greater the PR, the better the code sequence (modulator output signal) (see Dikson RK Broadband Systems. - M .: Communication, 1979, p. 65, and also p. 66, Fig. 3.11), the higher noise immunity of the modulator forming this output signal.

The proposed signals S (i, θ) have significantly better autocorrelation functions and distinguishability indices (PR) compared to the prototype, which increase the noise immunity of the output signals.

For the output signals generated by the Walsh function generator, prototype, and the proposed modulator, autocorrelation functions and distinguishability indices (PR) were calculated.

The calculation results for case 2 ⁿ = 16 are presented in table 1.

According to the results presented in table 1, it can be seen that the proposed modulator of the discrete signal in the temporary position generates output signals S (i, θ), in which the distinguishability index (PR) is greater,

на 87,5% и больше, чем в прототипе, использующем функции Р(i, θ), на 25%.than in a modulator using Walsh functions

by 87.5% and more than in the prototype using the functions P (i, θ), by 25%.

Using the invention, it is possible to create modulators of a discrete signal at a temporary position, generating output signals S (i, θ) having higher noise immunity by improving the correlation properties of the output signals by reducing the amplitude of the side peaks of the autocorrelation functions of these signals.

Claims (1)

Temporal positional discrete signal modulator comprising a quantizer, a storage unit, a key, an adder, a comparison unit, an integrator, a negative voltage source, a clock, the first and second frequency dividers, a multiplier, a modulator initial setup input and an n-bit memory register (where 2 ⁿ - number of functions in the discrete orthogonal modulated signal system), the quantizer, a storage unit, the key adder connected in series, the first input of the quantizer is the input of the modulator, O d of the storage unit is connected to the first input of the comparison unit, the second input of which is connected to the output of the integrator, the first input of which is connected to the output of the negative voltage source, and the output of the comparison unit is connected to the second inputs of the storage unit and integrator, the second key input is connected to the output of the clock and the input of the first frequency divider, the output of which is connected to the second input of the adder and the input of the second frequency divider, the output of which is connected to the installation input of the quantizer and the third input integrator’s house, the output of the multiplier is the output of the modulator, the output of the second frequency divider is connected to the enable input of the output of the stored memory register code, the input of the initial installation of the modulator is connected to the installation input of the quantizer, the third input of the integrator and the output enable of the output of the stored memory register code, characterized in that 2 has been entered ^n-channel Walsh function generator, 2 ⁿ -vhodovy switch 2 ^n-1 cyclic -bit shift register, the zero-body, a trigger, first additional key, the second additionally second key, an additional two-input adder, with the inverter, wherein the outputs 2 ⁿ -channel Walsh function generator coupled with similar data inputs of ⁿ 2 -vhodovogo switch outputs of bits of n-bit storage register connected to the control inputs of the same name 2 ⁿ -vhodovogo switch output 2 ⁿ -vhodovogo switch connected to the first input of the multiplier, a second input coupled to an output of the inverter managed, the adder output being coupled to a clock input of 2 ⁿ -channel Walsh function generator and a clock Odom 2 ^n-1 cyclic -bit shift register, the second output 2 ⁿ -channel Walsh function generator connected to the input zero-body, whose output is connected to the counting input of the flip-flop, a direct output of which is connected to the control input of the first additional key, latch inverted output is connected to the control input of the second additional key, the outputs of the first and second additional keys are connected to the corresponding information inputs of the additional two-input adder, the output of the additional two-input with mmatora connected to the information input of a controlled inverter, a control input coupled to an output significant bit 2 ^n-1 cyclic -bit shift register (2 ^n-1 -2) -th output 2 ⁿ -channel Walsh function generator connected to the data input of the first additional key, (2 ⁿ -4) -th output of the 2 ^n- channel generator of Walsh functions is connected to the information input of the second additional key.

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