RU2718953C1 - Information and energy security transmitter - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention relates to radio engineering and can be used to create a radio channel having high information security. High structural and energy concealment transmitter consists of a clock oscillator, two generators of a linear pseudorandom sequence, four adders of logical addition modulo 2, a unit for digitizing speech information, a generator of a carrier frequency, two multipliers, phase changers, an algebraic adder of a sequence, a band-pass filter, a generator and a device for encrypting signals for transmission.

EFFECT: technical result is creation of transmitter with high information and energy security.

1 cl, 1 dwg

Description

The invention relates to the field of radio engineering and can be used to create a radio channel with high information security.

Known for its similar practical use, the transmitter is based on the use of the radio standard IS-95, the principle of which is based on the formation of a linear noise-like signal of a masking signal of a comb structure in the windows of which useful information is transmitted [1].

The disadvantages of these devices are the difficulty in synchronizing the operation of the receiver and transmitter, as well as low information security.

The closest in technical essence is a transmitter of increased structural and energy secrecy [2], the principle of which is based on the fact that the detector perceives a useful signal as noise or its change, as well as a change in the coding of the useful signal.

The use of such devices is not limited to high informational secrecy.

The objective of the invention is to provide a technical solution alternative to the known solution [2].

The required technical result is achieved by the fact that the proposed device contains a clock generator, two linear pseudorandom sequence generators, four logical addition adders modulo 2, a speech information digitizing unit, a carrier frequency generator, two multipliers, a phase shifter, an algebraic sequence adder, a bandpass filter, an additional generator and a device for encrypting signals for transmission [3].

The invention is illustrated in the drawing, where in FIG. Figure 1 presents a possible version of the construction of a transmitter of information and energy secrecy, which contains:

1 - clock generator;

2 - linear pseudo-random sequence generator 1;

3 - linear pseudo-random sequence generator 2;

4 - adder of logical addition modulo 2;

5 - adder of logical addition modulo 2;

6 - block digitizing voice information;

7 - adder of logical addition modulo 2;

8 - logical addition adder modulo 2;

9 - carrier frequency generator;

10 - multiplier 1;

11 - multiplier 2;

12 - phase shifter;

13 - algebraic adder sequence;

14 - band-pass filter;

15 - an additional generator;

16 is a device for encrypting signals for transmission.

The information and energy stealth transmitter operates as follows: from the clock generator (1), a clock pulse is supplied simultaneously to an additional generator (15) and two linear pseudorandom sequence (register) generators (2 and 3). These registers contain orthogonal linear pseudorandom sequences (e.g., m-sequences). The clock pulse gives a command to the registers to sequentially issue the values recorded in them sequentially and synchronously. From the additional generator (15), the clock pulse is fed to the logical addition adder modulo 2 (7) and to the logical addition adder modulo 2 (8), where it is summed with the clock pulse coming from the logical addition adder modulo 2 (4) and the linear oscillator pseudo-random sequence 2 (3). From the linear pseudo-random sequence generator 1 (2), in this case, a biased value is output to the adder of logical addition modulo 2 (4) and unbiased to the adder of logical addition modulo 2 (5). From the block of digitizing voice information (6), at the same time, the information signal in digital form is fed in parallel to the logic combiners modulo 2 (4 and 5). Thus, the primary modulation of information with the sequence from the adder of logical addition modulo 2 (5) and its offset value from the adder of logical addition modulo 2 (4) is carried out. Modulated values are fed to the adders of the logical addition modulo 2 (7 and 8). Here, the second modulation of the signals occurs with the summation with the values obtained from the linear pseudo-random sequence generator 2 (3). The modulated values from the logical adders modulo 2 (7 and 8) are fed to the multipliers (10 and 11). Amplitude modulation by the product of the cosine (10) and sinusoidal signals (11), respectively, takes place in these blocks. The cosine wave is obtained in the carrier frequency generator (9), and the sine wave is obtained by the orthogonal transformation of the cosine wave in the phase shifter (12). The obtained complex signals from the multipliers (10 and 11) are fed to the algebraic adder of the sequence (13), then they are sent to a signal encryption device for transmission (16), where the corresponding method is implemented, as a result of which information security is increased (the very essence of useful information is hidden by implementing a method of encrypting signals for transmission) [3], after which the sum passes a band-pass filter (14) and is fed to a loaded antenna.

INFORMATION SOURCES

1. Standard IS-95. http://telecommun.ru/lektsii 10-15 s.

2. Ru 2646353, 2018.

3. Ru 2267227, 2005.

Claims (1)

The transmitter, consisting of a clock generator of block 1, two linear sequence generators of blocks 2, 3, four logic combiners modulo 2 blocks 4, 5, 7, 8, a block for digitizing voice information 6, a carrier frequency generator for block 9, two multipliers of blocks 10 , 11, a phase shifter of block 12, an algebraic adder of quadrature channels of block 13, a band-pass filter of block 14, generator 15, characterized in that it further comprises a device for encrypting signals for transmission 16, and the output of the algebraic sum and quadrature channel block 13 is connected with an input device for encrypting signals for transmission 16, and output device for encrypting signals for transmission 16 is connected to the input of the bandpass filter 14.

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