Radio communication line affording enhanced security of data transferred

FIELD: digital data transfer over radio channels to space and ground communication systems using noise-like signals.

SUBSTANCE: proposed radio transmitting line that has data source, pulse-width modulator, phase modulator, balance modulator, power amplifier, phase-keyed signal generator, carrier generator, transmitter synchronizer, and transmitting antenna on transmitting end as well as receiving antenna, mixer, intermediate-frequency amplifier, corrector, demodulator, heterodyne, reference phase-keyed signal generator, receiver synchronizer, and data receiver on receiving end is provided, in addition, with switch, decoder, flip-flop, random-access memory, and random-access memory address generator introduced in transmitting and receiving ends, respectively.

EFFECT: enhanced security of data transferred.

1 cl, 2 dwg

 

The invention relates to the field of discrete information transmission and can be used in radio channels to transmit information in space and terrestrial communication systems using pseudonoise signals.

Known communication systems with noise-like signals, such as A.S. 651492, which serves for transmission of discrete information. The main disadvantage of this system is low secrecy of transmitted information.

Also known radiotelephone communication system with photomanipulating broadband signals (see Varakin LE "communication Systems with noise-like signals", M., "R & s", 1985, page 16, figure 1.7), the main disadvantage is the low secrecy of transmitted information.

The closest to the technical nature of the claimed device is the device listed in the book Varakin LE "communication Systems with noise-like signals", M., "R & s", 1985, p.18, is, taken as a prototype.

Functional diagram of the device of the prototype is shown in figure 1, where we have introduced the following notation:

the transmitting part:

1 - source of information;

2 is a pulse-width modulator (PWM);

3 - phase modulator;

4 - balanced modulator;

5 - power amplifier;

6 - generator photomanipulating (FM) signal (a pseudo-random generator posledovatel the property);

7 - synchronizer transmitter;

8 - generator carrier frequency;

9 - transmitting antenna;

reception part:

10 - reception antenna;

11 - mixer;

12 - the intermediate frequency amplifier;

13 - correlator;

14 - demodulator;

15 - the recipient of the information;

16 - heterodyne;

17 - reference generator photomanipulating (FM) signal;

18 - synchronizer receiver.

The device prototype consists of a transmitting and receiving part.

The transmitting part includes sequentially connected information source 1, which is the input of the pulse-width modulator 2, the phase modulator 3, the balanced modulator 4 and the amplifier 5, the output of which is connected to the transmitting antenna 9. In addition, contains a synchronizer transmitter 7, the first output of which is connected with the second input pulse-width modulator 2, and the second output through the generator photomanipulating (FM) signal 6 is connected to a second input of the phase modulator 3; and also includes a generator carrier frequency 8, the output of which is connected to a second input of the balanced modulator 4.

The reception part contains connected in series receiving antenna 10, mixer 11, the intermediate frequency amplifier 12, the correlator 13, the demodulator 14 and a receiver 15, which is the output device. In addition, the content is t synchronizer receiver 18, the first outlet through which the local oscillator 16 is connected to a second input of the mixer 11 and the second output of the synchronizer receiver 18 is connected with the second inputs of the demodulator 14 and the correlator 13, the output of which is connected to the clock input of the receiver 18, the third output of which through reference generator FM signal 17 is connected to the third input of the correlator 13.

The device prototype works as follows.

From information source 1 phone message arrives at the first input pulse-width modulator (PWM) 2, with which the PWM signal at the first input of the phase modulator 3, to the second input of which receives photomanipulating broadband signal (FM PSS) from the output of the generator FM signal 6. The work of the pulse-width modulator 2 and the generator FM signal 6 controls the synchronizer transmitter 7, which generates the required frequency and control signals.

The FM output signal from the phase modulator 3, containing the information arrives at the first input of the balanced modulator 4, the second input of which receives the FM signal from the output of the generator carrier frequency 8. In the balanced modulator 4 is balanced modulation of the FM signal with a carrier frequency. In the power amplifier 5 of the FM signal is amplified to the required size and then through the antenna 9 is radiated into space.

Accepted welcome the th antenna 10 signal fed to the mixer 11, where is transferred with the help of the local oscillator 16 to an intermediate frequency, is amplified in the intermediate frequency amplifier 12 and fed to the first input of the correlator 13, and third input pulses from the reference generator FM signal 17. In the correlator 13 is optimal signal processing, resulting in the output of the correlator 13 is formed in the phone message in the form of a PWM signal, which is supplied to the clock input of the receiver 18 and the first input of the demodulator 14, which is allocated information component. From the output of the demodulator 14 received a phone message is presented to the receiver 15. The synchronizer receiver 18 by controlling the local oscillator 16, searches the FM signal in frequency and time, and then maintains the synchronism in the receiving part, controlling the operation of the reference generator FM signal 17, the correlator 13 and demodulator 14.

The disadvantage of this device prototype is a small sneak transmitted information, since the information broadcast is transmitted in an unsecured form.

To eliminate this drawback in-line radio with high secrecy of the transmitted information containing in the transmitting part, the United source of information, which is the input of the pulse-width modulator, phase modulator, balanced modulator and the power amplifier is STI, the output of which is connected to the transmitting antenna, as well as containing the generator carrier frequency, the output of which is connected to a second input of the balanced modulator, and the synchronizer transmitter, the first output of which is connected with the second input pulse-width modulator, and the second output of the synchronizer transmitter is connected to the generator input photomanipulating signal; receiving parts, United receiving antenna, a mixer, an intermediate frequency amplifier, the correlator, the demodulator and receiver of information that is the output device, and containing a clock receiver, a first outlet through which the local oscillator is connected to a second input of the mixer, the second output of the clock receiver is connected with the second inputs of the demodulator and correlator, the output of which is connected to the clock input of the receiver, the third output of which is connected to the generator input reference photomanipulating signal entered in the transmitter: switch the transmitter, memory device of the transmitter, driver memory address of the transmitter device, a counting trigger transmitter and the decoder transmitter, while the second output of the synchronizer transmitter is connected to the counting input of the shaper address random access memory device is VA transmitter, the output of which is connected to the address input of the random access memory of the transmitter, the serial output of the generator photomanipulating signal is connected to the first information input of the switch of the transmitter and information input random access memory device of the transmitter, the output of which is connected with the second information input of the switch of the transmitter, the output of which is connected to a second input of the phase modulator, the n parallel outputs of the generator photomanipulating signal respectively connected to the n inputs of the decoder, the transmitter, the output of which is connected to the counting input of the counting trigger the transmitter, the control input of which is a control input of the transmitting portion of the device, direct counting trigger transmitter connected to the first control inputs of the driver the address of the random access memory of the transmitter, random access memory device of the transmitter and switch transmitter inverted output of the counting trigger transmitter is connected to the second control inputs of the driver the address of the random access memory of the transmitter, memory device of the transmitter and switch the transmitter; introduced into the receiving part: switch the receiver, the memory device is the receiver, shaper address random access memory of the receiver, and the audit trigger receiver and decoder of the receiver, and the third output clock of the receiver is connected to the counting input of the shaper addresses of the random access memory of the receiver, the output of which is connected to the address input of the random access memory of the receiver, the serial output of the reference generator photomanipulating signal is connected to the first information input of the switch and receiver information input random access memory of the receiver, the output of which is connected with the second information input of the switch of the receiver, the output of which is connected to the third input of the correlator, the n parallel outputs of the generator support photomanipulating signal respectively connected to the n inputs of the decoder of the receiver, the output of which is connected with the accounts entrance countable trigger receiver, the control input of which is a control input receiving part of the device, direct counting trigger receiver is connected to the first control inputs of the driver the address of the random access memory of the receiver, a random access memory of the receiver and switch the receiver, the inverse output of the counting trigger receiver is connected with the second control what their inputs shaper address random access memory receiver random access memory of the receiver and switch the receiver.

Figure 2 shows a functional diagram of the proposed device, where we have introduced the notation:

the transmitting part:

1 - source of information;

2 is a pulse-width modulator (PWM);

3 - phase modulator;

4 - balanced modulator;

5 - power amplifier;

6 - generator photomanipulating (FM) signal (a pseudo-random sequence generator);

7 - synchronizer transmitter;

8 - generator carrier frequency;

9 - transmitting antenna;

19 - switch transmitter;

20 is a random access memory (RAM) transmitter;

21 - shaper address random access memory (FA RAM) transmitter;

22 - counting trigger transmitter;

23 - decoder transmitter;

reception part:

10 - reception antenna;

11 - mixer;

12 - the intermediate frequency amplifier;

13 - correlator;

14 - demodulator;

15 - the recipient of the information;

16 - heterodyne;

17 - reference generator photomanipulating (FM) signal generator reference pseudo-random sequence);

18 - synchronizer receiver;

24 - switch the receiver.

25 - random access memory (RAM) to the receiver.

26 - shaper address random access memory (FA RAM) of priem the spacecraft;

27 - counting receiver trigger;

28 - decoder of the receiver.

The proposed device consists of a transmitting and receiving part.

The transmitting portion of the device contains a serial connected information source 1, which is the input of the pulse-width modulator (PWM) 2, the phase modulator 3, the balanced modulator 4 and the amplifier 5, the output of which is connected to the transmitting antenna 9, while the second input of the balanced modulator 4 is connected to the output of the generator carrier frequency 8. The first output of the synchronizer transmitter 7 is connected with the second PWM input 2, and the second output clock transmitter 7 is connected to the counting input of the shaper address random access memory (FA RAM) transmitter 21, the output of which is connected to the address input of random access memory (RAM) of the transmitter 20. In addition, the second output of the synchronizer transmitter 7 is connected to the generator input photomanipulating (FM) signal 6, n parallel outputs which are connected respectively to the n inputs of the decoder, the transmitter 23, the output of which is connected to the counting input of the counting trigger transmitter 22, a control input which is a control input of the transmitter of the device. The serial output of the generator photomanipulating (FM) signal 6 is connected to the first and the information input switch of the transmitter 19 and the information input RAM to the transmitter 20, the output of which is connected with the second information input of the switch of the transmitter 19, the output of which is connected to a second input of the phase modulator 3. Direct counting of the trigger transmitter 22 is connected to the first control inputs F RAM the transmitter 21, the RAM of the transmitter 20 and the switch of the transmitter 19. Inverted output of the counting trigger transmitter 22 is connected with the second control inputs F RAM the transmitter 21, the RAM of the transmitter 20 and the switch of the transmitter 19.

Receiving portion of the device contains a serial connected receiving antenna 10, mixer 11, the intermediate frequency amplifier 12, the correlator 13, the demodulator 14 and a receiver 15, which is the output device. The first output of the synchronizer receiver 18 via the local oscillator 16 is connected to a second input of the mixer 11. The second output of the synchronizer receiver 18 is connected with the second inputs of the demodulator 14 and the correlator 13, the output of which is connected to the clock input of the receiver 18, the third output of which is connected to a counter input F RAM receiver 26, the output of which is connected to the address input of the RAM of the receiver 25. In addition, the third output clock of the receiver 18 is connected to the input of the reference generator FM signal 17, the n parallel outputs of which are connected respectively to the n inputs of the decoder of the receiver 28, the output of which is connected with MF who Tim entrance countable trigger receiver 27, the control input of which is a control input receiving part of the device. The serial output of the reference generator FM signal 17 is connected with the first information input of the switch of the receiver 24 and an information input RAM receiver 25, the output of which is connected with the second information input of the switch of the receiver 24, the output of which is connected to the third input of the correlator 13. Direct counting trigger receiver 27 is connected to the first control inputs F RAM receiver 26, the RAM of the receiver 25 and the switch of the receiver 24. Inverted output of the counting trigger receiver 27 is connected with the second control inputs F RAM receiver 26, the RAM of the receiver 25 and the switch of the receiver 24.

The proposed device is as follows.

From information source 1 phone message arrives at the first input of PWM 2, to the second input of which receives pulses from the first output of the synchronizer transmitter 7. With unit output 2 PWM signal is supplied to the first input of the phase modulator 3, to the second input of which the output switch of the transmitter 19 is supplied photomanipulating broadband signal representing the alternating forward and reverse pseudo-random sequences (SRP). As SRP, you can use M-sequence of maximal length (see Varakin LE "communication Systems Shu is podobnie signals", M., "R & s", 1985, p.49).

Direct SRP is formed on the serial output of the generator FM signal 6, controlled by clock pulses received at its input from the second output of the synchronizer transmitter 7, and is fed to the first information input of the switch of the transmitter 19. Reverse SRP is formed from a straight SRP through a coup d'état, that is the element of the SRP, which was the first becomes the last, and the element of the SRP, which was the last becomes the first. The coup SRP as follows. With serial generator output FM signal 6 SRP is supplied to the information input of the RAM of the transmitter 20, which is installed on the record. Write mode or read RAM transmitter 20 is provided by the state of the outputs of the counting trigger transmitter 22, the control input of which the signal log."1 with the control input of the receiving part, permissive mode scrambling, i.e. the alternation of forward and reverse SRP, and at the counting input signal from the output of the decoder transmitter 23, which is formed as follows.

With n parallel outputs of the generator FM signal 6 parallel binary code SRP (for example, when n is equal to 10 is an M-sequence of length 1023) is supplied respectively to the n inputs of the decoder transmitter 23 that is configured on the specified number (in this case, the number 1023). This output is estimator transmitter 23, a signal will appear log."1", defines a temporary switching of the counting trigger transmitter 22, with direct and inverted outputs.

If the direct output of the counting trigger transmitter 22 is formed, the signal level of the log."1, he entered on the first control input of RAM transmitter 20, sets it in write mode. At the inverse output of the counting trigger transmitter 22 and, consequently, the second control input of RAM transmitter 20 is the signal level of the log."0".

In addition, the output signals of the counting trigger transmitter 22 control F RAM the transmitter 21. Upon receipt of the signal level of the log."1 direct output of the counting trigger transmitter 22 to the first control input F RAM the transmitter 21 is forming a recording address by adding clock pulses at its counting input from the second output of the synchronizer transmitter 7. At the inverse output of the counting trigger transmitter 22 and, consequently, the second control input F RAM the transmitter 21 is the signal level of the log."0".

If the inverted output of the counting trigger transmitter 22 is formed, the signal level of the log."1, he entered on the second control input of RAM transmitter 20, sets the mode to read. Thus to direct the output of the counting trigger transmitter 22 and, consequently, on the first control input of RAM, a transmitter and a receiver is and 20 will be the signal level of the log."0". Upon receipt of the signal level of the log."1" with the inverted output of the counting trigger transmitter 22 to the second control input F RAM the transmitter 21 it is the formation of the read address by subtracting clock pulses at its counting input. Address when reading from the RAM of the transmitter 20 is set so that information is read in reverse order.

In addition, the signals from the forward and reverse outputs of the counting trigger transmitter 22 are received respectively in the first and second control inputs of the switch of the transmitter 19, which commutes on its output directly to the SRP, if the first control signal is input to the log."1 direct output of the counting trigger transmitter 22 or the SRP reverse the order of the pulses, if the second control signal is input to the log."1" with the inverted output of the counting trigger transmitter 22.

The FM output signal from the phase modulator 3, containing the information arrives at the first input of the balanced modulator 4, the second input of which receives the signal from the output of the generator carrier frequency 8. In the balanced modulator 4 is balanced modulation of the FM signal with a carrier frequency. From the output of the balanced modulator 4 of the FM signal is fed to the input of amplifier 5, which is amplified to the required size and then through the antenna 9 is radiated in simple is ansto.

Adopted by the receiving antenna 10, the signal fed to the mixer 11, which is transferred with the help of the local oscillator 16 to an intermediate frequency, is amplified in the intermediate frequency amplifier 12 and fed to the first input of the correlator 13, a third input which receives photomanipulating broadband signal (FM PSS) with the output switch of the receiver 24, which represents an alternating forward and reverse SRP. Direct SRP is formed on the serial output of the reference generator FM signal 17 that is managed by a clock pulse applied to its input from the third output of the synchronizer receiver 18, and is fed to the first information input of the switch of the receiver 24. Reverse SRP is formed from a straight SRP as follows. With the serial output of the reference generator FM signal 17 SRP is supplied to the information input of the RAM of the receiver 25, which is installed on the record. Write mode or read RAM receiver 25 is provided by the state of the outputs of the counting trigger receiver 27, the control input of which the signal log."1 with the control input of the receiving part, permissive mode scrambling, i.e. the alternation of forward and reverse SRP, and at the counting input signal from the output of the decoder of the receiver 28, which is formed as follows.

With n parallel outputs of the generator support photomanipulating (FM) signal is Ala 17 parallel binary code SRP (as in the transmitting part, this M-sequence of length 1023) is supplied respectively to the n inputs of the decoder of the receiver 28 that is configured on the specified number (in this case, the number 1023). At the output of the decoder of the receiver 28, a signal will appear log."1"defining temporary switching of the counting trigger receiver 27.

If the direct output of the counting trigger receiver 27 is formed the signal level of the log."1, he entered on the first control input of RAM receiver 25, installs it in write mode. At the inverse output of the counting trigger receiver 27 and, consequently, the second control input of RAM receiver 25 is the signal level of the log."0".

In addition, the output signals of the counting trigger receiver 27 control F RAM receiver 26, to the counting input of which serves clock pulses from the third output of the synchronizer receiver 18. Upon receipt of the signal level of the log."1 direct output of the counting trigger receiver 27 to the first control input F RAM receiver 26 it is the formation of the recording address by adding clock pulses at its counting input. At the inverse output of the counting trigger receiver 27 and, consequently, the second control input F RAM receiver 26 is the signal level of the log."0".

If the inverted output of the counting trigger receiver 27 is formed the signal level of the log."1"it, the pic is of upiv on the second control input of RAM receiver 25, install it in the reading mode. Thus to direct the output of the counting trigger receiver 27 and, consequently, on the first control input of RAM receiver 25 is the signal level of the log."0". Upon receipt of the signal level of the log."1" with the inverted output of the counting trigger receiver 27 to the second control input F RAM receiver 26 it is the formation of the read address by subtracting clock pulses at its counting input. Address when reading from the RAM of the receiver 25 is set so that information is read in reverse order.

In addition, the signals from the forward and reverse outputs of the counting trigger receiver 27 receives respectively on the first and second control inputs of the switch of the receiver 24, which switches on its output directly to the SRP, if the first control signal is input to the log."1 direct output of the counting trigger receiver 27 or SRP reverse the order of the pulses, if the second control signal is input to the log."1" with the inverted output of the counting trigger receiver 27.

In the correlator 13 is optimal signal processing, resulting in the output of the correlator 13 is formed in the phone message in the form of a PWM signal, which is supplied to the clock input of the receiver 18 and the first input of the demodulator 14, which is allocated information component. In the course of the demodulator 14 received a phone message is presented to the receiver 15. The synchronizer receiver 18 by controlling the local oscillator 16, searches the FM signal in frequency and time, and then maintains the synchronism in the receiving part, controlling the operation of the correlator 13 and demodulator 14. Moreover, the time search is carried out until, until there is coincidence of direct and inverse SRP on the first and third inputs of the correlator 13.

As a generator FM signal 6 and the reference generator FM signal 17 can be used as a generator of M-sequences of maximum length, performed on binary triggers shown in RIS, p.49. books Varakin LE "communication Systems with noise-like signals", M., "R & s", 1985

The shaper RAM address of the transmitter 21 and the shaper RAM address of the receiver 26 can be made on the basis of the counter control addition and subtraction (reversible counter)that are listed on p. 249 of the book of GI Poukhalskii, THE Novoseltseva "Design of discrete devices integrated circuits", M., "R & s", 1999

The implementation of the remaining components of the device is also not straightforward, as the descriptions of their widely published in technical literature.

Thus, the application of the proposed device to send information of alternating forward and reverse SRP greatly improved the stealth pen is havemay information.

Line radio with high secrecy of the transmitted information containing in the transmitting part connected in series source of information, which is the input of the pulse-width modulator, phase modulator, balanced modulator and the power amplifier, the output of which is connected to the transmitting antenna, as well as containing the generator carrier frequency, the output of which is connected to a second input of the balanced modulator, and the synchronizer transmitter, the first output of which is connected with the second input pulse-width modulator, and the second output of the synchronizer transmitter is connected to the generator input photomanipulating signal in the receiving part, the United receiving antenna, a mixer, an intermediate amplifier frequency correlator, the demodulator and receiver of information that is the output device, and containing a clock receiver, a first outlet through which the local oscillator is connected to a second input of the mixer, the second output of the clock receiver is connected with the second inputs of the demodulator and correlator, the output of which is connected to the clock input of the receiver, the third output of which is connected to the generator input reference photomanipulating signal, characterized in that they are introduced in the transmission part of the switch of the transmitter, the Opera the active memory device of the transmitter, shaper address random access memory device of the transmitter, and the audit trigger transmitter and the decoder transmitter, while the second output of the synchronizer transmitter is connected to the counting input of the shaper address random access memory device of the transmitter, the output of which is connected to the address input of the random access memory of the transmitter, the serial output of the generator photomanipulating signal is connected to the first information input of the switch of the transmitter and information input random access memory device of the transmitter, the output of which is connected with the second information input of the switch of the transmitter, the output of which is connected to a second input of the phase modulator, the n parallel outputs of the generator photomanipulating signal respectively connected to the n inputs of the decoder, the transmitter, the output of which is connected with the accounts the counting input of the trigger transmitter, the control input of which is a control input of the transmitting portion of the device, direct counting trigger transmitter connected to the first control inputs of the driver the address of the random access memory of the transmitter, memory device of the transmitter and switch transmitter inverted output of the counting trigger transmitter is outinen with the second control inputs of the driver the address of the random access memory of the transmitter, random access memory device of the transmitter and the switch of the transmitter is introduced into the receiving portion of the switch of the receiver, random access memory receiver, driver memory address of the receiver, and the audit trigger receiver and decoder of the receiver, and the third output clock of the receiver is connected to the counting input of the shaper addresses of the random access memory of the receiver, the output of which is connected to the address input of the random access memory of the receiver, the serial output of the reference generator photomanipulating signal is connected to the first information input of the switch and receiver information input random access memory of the receiver, the output of which is connected with the second information input of the switch of the receiver, the output of which is connected to the third input of the correlator, n parallel outputs of the generator support photomanipulating signal respectively connected to the n inputs of the decoder of the receiver, the output of which is connected to the counting input of the counting trigger receiver, the control input of which is a control input receiving part of the device, direct counting trigger receiver is connected to the first control inputs of the driver addresses operational remember the th receiver, random access memory of the receiver and switch the receiver, the inverse output of the counting trigger receiver is connected to the second control inputs of the driver the address of the random access memory of the receiver, a random access memory of the receiver and switch the receiver.



 

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EFFECT: increased trustworthiness of information being transferred, improved resistance to interference due to realization of phase selectivity property, improved concealment and increased resolution.

2 cl, 2 dwg

FIELD: radio engineering, possible use in communication systems with noise-like signals.

SUBSTANCE: in accordance to method, digital data, received from the source of information on time span [(n-1)T,nT], where T - period of pseudo-random series, n=0,1,2..., during transfer is transformed to shift of pseudo-random series, generated on time span [nT,(n+1)T], and during receipt, value of shift of pseudo-random series of received signal relatively to pseudo-random series of previously received signal is determined, value of shift is transformed to digital data of received information.

EFFECT: increased speed of information transfer along communication channel.

3 cl, 5 dwg

FIELD: radio engineering.

SUBSTANCE: newly introduced in radio line on transmitting end are digital signal source, periodic video pulse sequence generating unit, code combination generating unit, code combination encoding unit, first adder, synchronizing pseudorandom sequence generator, frequency standard, and power amplifier; newly introduced on receiving end are high-frequency unit, frequency standard, clock and sync pulse generator, synchronizing pseudorandom sequence generator, synchronizing pseudorandom sequence search unit, N correlators, decision unit, encoded code combination memory device, code combination decoder, and adder.

EFFECT: enhanced noise immunity in digital signal reception and also enhanced informational and structural security.

1 cl, 4 dwg

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