High-speed digital optical signal transfer line

FIELD: electrical communications; quantum radio engineering and optical communications.

SUBSTANCE: proposed transfer line that can be used, for instance, in fiber-optic, laser, atmospheric optical and other communication systems has sending section and receiving section; sending section has clock generator, E-code shaper, code word shaping unit, additional trains shaping unit, first and second optical signal shaping channels, and optical multiplexer connected through optical signal transfer medium to receiving section; the latter has optical matched filter, directional coupler, first and second optical signal processing channels, subtracter, video amplifier, automatic gain control, optimal filter, resolving unit, and clock frequency recovery unit.

EFFECT: enhanced noise immunity, extended length of transfer line.

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The invention relates to the field of quantum radio and optical communication can be used in the apparatus of a fiber-optic, laser, space, atmospheric and other communication lines.

Famous lines (see, for example, patent RF №2121229, IPC 6 H 04 10/00, Appl. 12.09.1995, publ. 27.10.1998 or patent of the RF No. 2155449, IPC 7 H 04 10/00, Appl. 22.10.1999, publ. 27.08.2000).

Known optical communication system according to the patent of Russian Federation №2121229 consists of a transmitting part which contains a controllable oscillator reference frequency, combined counter, the pulse current amplifier, the light emitter and the receiving part, which contains the sensor, the pulse amplifier is a voltage limiter, a low-pass filter, one-shot, the light reception signal, and uses to transmit digital data conversion waveform in a shorter optical pulses.

The disadvantage of this system is its low robustness and reliability, as well as a small length of transmission line in open optical channels due to the significant weakening and random parameters (phase, frequency, and polarization), which limits the area of application of this system.

Well-known transmission line digital optical signal by the RF patent №2155449 contains the first signal Converter, the amplifier-modulator, the laser generator is, the device stabilization of the laser power, the first matching device, the transmission medium of the optical signal, the second impedance device, photodetector, forming N filters N phase regenerators, N pre-amplifier, amplifier, automatic gain control, restore device clock frequency signal, the amplifier-shaper pump, a second signal Converter, and uses to transmit the conversion of the input digital signal to one of the types: sinusoidal phase-shift keyed signal; a sequence of alternating pulses and pauses; iimpulse signal.

The disadvantage of this transmission line is decreased immunity and reliability by increasing the speed of transmission of the digital signal and, therefore, reducing the length of the transmission line, which limits the scope of this transmission line optical digital signal.

The closest in technical essence and function to the requested system analogue (prototype) is the transmission line high-speed digital optical signal (see Patent No. 2155448 of the Russian Federation, IPC 7 H 04 10/00, Appl. 22.10.1999, publ. 27.08.2000. Famous line contains the amplifier modulator, a laser generator, a device for stabilizing the laser power, the first matching the device, the transmission medium of the optical signal, the second impedance device, photodetector, multi-frequency resonator, amplifier, automatic gain control, frequency filter, N demodulators N modulators, N-band bandwidth channel filters, oscillator, frequency multiplier, N-band bandwidth filters bearing, the first adder, the second adder, the attenuator, the third adder, a delay line, the optimal filter, the crucial device restore device clock frequency.

The input transmission line high-speed digital optical signal is the first input of the amplifier-modulator, the output of which is connected to the first input of the laser generator, the output of which is connected to the input of the first impedance device and the input device stabilization of the laser power, the first and second outputs of the device stabilization of the laser power are connected respectively to the second inputs of the amplifier-modulator and the second input of the laser generator, the output of the first impedance device connected to the input transmission medium of the optical signal, the output of which is connected to the input of the second impedance device, the output of which is connected to the input of the photodetector, the output of which is connected to the input multi-frequency resonator, the output of which is connected with the second input of the amplifier, in the course of the amplifier is connected to the input of the automatic gain control, the output of which is connected to the first input of the amplifier, the output of which is connected to the input multi-frequency filter, the first output of which is connected to the first input of the first adder, the output of which is connected to the first input of the second adder, the output of which is connected to the input of the optimal filter and the first input of the third adder, the output of which is connected to the input of the delay line, the output of which is connected to the input of the attenuator, the output of which is connected with the second inputs of the second and third adder, the outputs of the multi-frequency filter from the second to (N+1)-th connected with respective inputs of the demodulators from the first to N-th outputs which is connected with the first inputs of the respective modulators, the outputs of which are connected with the inputs of the respective band-pass filters of the channel whose outputs are connected to respective inputs of the first adder from the second to (N+1)-th, the output of the generator is connected to the input of the frequency multiplier, the outputs of which from the first to N-th connected with the inputs of the respective band-pass filters bearing, the outputs of which are connected with the second inputs of the respective modulators from the first to N-th output of the optimal filter is connected to the first input of the casting device and the input device recovery clock frequency, the output of which is connected to the second I the house of a casting device, the output of which is output transmission lines.

The transmission line high-speed digital optical signal - prototype uses increase the energy potential by converting an electrical signal into an infinite fading pulse sequence, using the method of expanding the range not deteriorating the noise properties of the line.

The disadvantage of the prototype is a low noise immunity and reliability, as well as a small length of transmission line for signals of equal energy (FM, there), which limits the scope of this transmission line high-speed digital optical signal.

The aim of the invention is to develop a transmission line of high-speed digital optical signal, providing the expansion of the scope through the use of complex signals based on E-codes (codes Welty), without lateral emissions in the aperiodic autocorrelation function for coherent bundle on which the optical level is an increase in the amplitude of the optical signal at the input of the photodetectortimes (where N=2^kwhere k≥2 is an integer), resulting in increased noise immunity, as well as the length of the transmission line high-speed digital optical signal and is designed for volconn the optic, laser, space, atmospheric and other communication lines.

To achieve a technical result in the well-known transmission line high-speed digital optical signal containing the transmission of the first channel forming optical signal, the input of the transmitting part is the input transmission line. The output of the transmitting part through the transmission medium of the optical signal connected to the input of the receiving part, which includes the first channel processing of the optical signal amplifier, a control input which is connected to the output of automatic gain control, the input of which is connected to the output of the amplifier and the input of the optimal filter, the output of which is connected to the information input of the decision making unit and the input unit of recovery clock frequency, the output of which is connected to the control input of the decision making unit whose output is the output transmission line. Additionally, the transmission of the introduced identical to the first, the second channel forming optical signal, clock, driver E-code, blocks the formation of coding combinations, generating additional sequences and an optical combiner. The generator output clock pulses is connected to the clock inputs of the blocks forming the coding combination and formation of additional PEFC is guatelmala and to the input of the shaper E-code the output of which is connected to the information input processing unit coding combinations, the first and second control outputs of which are connected respectively to the first and second control inputs of the processing unit of additional sequences, the information input which is the input transmission line, the first and second information output unit generating additional sequences are connected to the inputs respectively of the first and second channels forming optical signal, the outputs of which are connected respectively to the first and second information inputs of the optical combiner whose output is the output of the transmitting part. Additionally, the receiving part introduced identical to the first, the second channel of the optical signal processing, optical coherent filter, a directional coupler and myCitadel. The input optical matched filter is the input of the receiving part. The optical output of the matched filter connected to the input of the directional coupler, the first and second information outputs of which are connected to the inputs respectively of the first and second processing channels of the optical signal. The outputs of the first and second processing channels of the optical signal are connected respectively to the first and second information inputs vicites you the od which is connected to the information input of the amplifier.

The channel forming optical signal transmitter part consists of an amplifier-modulator, a laser generator of the stabilizer of the laser power and the matching device. The output of the amplifier-modulator connected to the information input of the laser generator, the output of which is connected to the input matching unit and the stabilizer of the laser power. The first and second control outputs of the stabilizer of the laser power is connected respectively to the control inputs, respectively, of the amplifier-modulator and the laser generator. The information input of the amplifier-modulator and the output impedance of the device are respectively the input and output channel processing transmitting part.

The channel processing of the optical signal receiving part consists of a photodetector and a matching device. The output impedance of the device connected to the input of the photodetector and the input matching unit and the output of the photodetector are respectively the input and output channel processing receiving part.

The shaping unit coding combinations consists of the first and second controllable switches and element. The information input of the first controlled switch is connected to the information input of the second controlled switch and an information input processing unit coding combinatory and second inputs of the element AND IS NOT connected to the clock input of the first controlled switch and are clocked by the input processing unit coding combinations. The output element AND IS NOT connected to the clock input of the second controlled switch, the output of the first and second controllable switches are respectively the first and second outputs forming unit coding combinations.

Block the formation of additional sequences consists of a driver information sequences, the first and second delay lines, each of which is equipped with N outputs, where N=2^k, k≥2 is an integer, the first and second groups of modulators of N modulators in each group, the first and second N-vchodove adders, j-th output of the shaper information sequence, where j=1, 2, ..., N, are connected to the managed inputs of the j-th modulators of the first and second groups of modulators, the outputs of the j-th modulators of the first and second groups of modulators connected to the j-th inputs respectively of the first and second N-vchodove adders, the j-th outputs of the first and second delay lines connected to the information inputs of the j-th modulators, respectively, the first and second groups of modulators. Clock and informational inputs of the driver information sequences are, respectively, the clock and data inputs of the processing unit of additional sequences. The inputs of the first and second delay lines are respectively the first and the second driven unit is formirovaniya additional sequences. The outputs of the first and second N-vchodove adders are respectively the first and second information output unit generating additional sequences.

Optical coherent filter consists of a generator of clock pulses, shaper E-code, shaper decoding signals, a delay line, equipped with N outputs, N modulators,- phasers onand N-Vodolaga optical combiner. The generator output clock pulses is connected to the clock input of the shaper decoding signals and the input of the shaper E-code. The output of shaper E-code connected to the information input of the shaper decoding signals, the j-th output of the shaper decoding signals connected to the control input of the j-th modulator, the output of the i-th, where i=1, 3, 5,...,N-1, a modulator connected to the input of the i-th phase shifterthe output of the i+1-th modulator and the output of the i-th phase shifterconnected respectively to the i+1-th and i-th inputs of the N-Vodolaga optical combiner, the j-th output of the delay line is connected to the information input of the j-th modulator, the information input of the delay line is an information input optical matched filter. Output N-Vodolaga optical combiner is the tsya information output optical matched filter.

The modulator consists of an optical switch, Phaser π and an optical combiner. The first and second information outputs of the optical switch are connected respectively to the first information input of the optical combiner and the input of the phase shifter on π. The second information input of the optical combiner connected to the output of the phase shifter on π. Information and clock inputs of the optical switch are respectively the information and clock inputs of the modulator, the output of the optical combiner is an information modulator output.

The analysis of the level of technology has allowed to establish that the analogues, characterized by a set of characteristics is identical for all features of the claimed technical solution is available, which indicates compliance of the device to the condition of patentability "novelty". Search results known solutions in this and related areas of technology in order to identify characteristics that match the distinctive features of the prototype of the features of the declared object has shown that they do not follow explicitly from the prior art. The prior art also revealed no known effect provided the essential features of the claimed invention transformations on the achievement of specified technical result is the same. Therefore, the claimed invention meets the condition of patentability "inventive step".

The claimed invention is illustrated by the schema:

Figure 1 - structural diagram of the transmission line high-speed digital optical signal;

Figure 2 - block diagram of the processing unit coding combinations;

Figure 3 diagrams explaining the principle of forming the coding combinations;

4 is a structural block circuit generating additional sequences;

5 is a plot illustrating the principle of the formation of ensembles of information coding sequences and combinations;

6 is a plot illustrating the principle of the formation of the ensemble coded information sequences and complementary sequences;

7 is a structural diagram of an optical matched filter;

Fig - structural diagram of the modulator optical matched filter;

Figure 9 is a plot illustrating the principle of the formation of the ensemble of optical signals;

Figure 10 is a plot illustrating the principle of the formation of the ensemble decoding signals;

11 is a plot illustrating the principle of the formation of the ensemble decoded optical signals;

Fig - diagrams explaining the principle of forming the autocorrelation functions (ACF) of the elements of the information sequence and the order of treatments is key optical signal.

The transmission line high-speed digital optical signal presented in figure 1, consists of a transmitting part and the receiving part. The transmitting part comprises a generator of clock pulses 1, the set of E-code 2, the shaping unit coding combinations 3, block the formation of additional sequences 4, the first and second channels forming optical signal 5₁-5₂optical integrator 6. The output of clock 1 is connected to the clock inputs of the blocks forming the coding combinations 3 and the formation of additional sequences 4 and to the input of the shaper E-code 2. The output of shaper E-code 2 is connected to the information input processing unit coding combinations 3, the first and second control outputs of which are connected respectively to the first and second control inputs of the processing unit additional sequences 4. An information input unit generating additional sequences 4 is an input transmission line, the first and second information output unit generating additional sequences 4 is connected to the inputs respectively of the first and second channels forming optical signal 5₁-5₂. The outputs of the first and second channels forming optical signal 5₁-5₂under the turned off respectively to the first and second information inputs of the optical multiplexer 6, the output which is the output of the transmitting part. The output of the transmitting part through the transmission medium of the optical signal 7 is connected to the input of the receiving part. The reception part contains coherent optical filter 8, a directional coupler 9, the first and second processing channels of the optical signal 10₁-10₂myCitadel 11, amplifier 12, the automatic gain control 13, the optimal filter 14, the deciding unit 15, the recovery block clock frequency 16. The input optical matched filter 8 is input receiving part, and its output connected to the input of the directional coupler 9. The first and second information outputs of the tap 9 is connected to the inputs respectively of the first and second channel processing of the optical signal 10₁-10₂. The outputs of the first and second channel processing of the optical signal 10₁-10₂connected respectively to the first and second information inputs vicites 11. The output of vicites 11 is connected to the information input of the amplifier 12. The control input of the amplifier 12 is connected to the output of the automatic gain control 13, the inlet of which is connected to the output of the amplifier 12 and the input of the optimal filter 14. The optimal output of filter 14 is connected to the information input of the decision making unit 15 and to the input of the recovery block clock frequency 16. The output of the Loka recovery clock frequency 16 is connected to the control input of the decision making unit 15, the output of which is output transmission lines.

Clocks 1 in the transmitting part and 8.1 receiving parts are identical and are intended for forming clock pulses with the required frequency ƒ_Tg=B (where a is the speed of transmission of a sequence of elements of E-code (technical speed), it is expressed by the number of messages transmitted per unit of time, measured in bauds). It can be implemented as described in the book Limportance, Utils, Scholae “Digital devices on integrated circuits in communication technology” (M.: Communication, 1979, p.72-76, RIS).

Shapers E-codes 2 in the transmitting part and 8.2 receiving parts are identical and are used to form encoding (decoding) the sequence (E-code) with period N=2^k(where N is the number of elements in the Quaternary-coded combinations; k≥2 integer; j=1, 2, ..., N is the element number E-code). His scheme is known and described in A.S. No. 1177910 the USSR, IPC 4 H 03 M 5/00, H 04 L 3/02, Appl. 18.04.84, publ. 07.09.85, A.S. No. 1805550 the USSR, IPC 6 H 04 L 14/00, Appl. 07.02.91, publ. 30.03.93 or article Roland Wilson and John Richter “Generation and Performance of Quadraphase Welti Codes for Radar and Synchronization of Coherent and Differentially Coherent PSK” (IEEE Transactions on Communications, vol.COM-27, NO.9, September 1979, p.1296-1301, Figure 1).

The shaping unit coding combinations 3, scheme is presented in figure 2, is designed to generate the first and second coderush the hand, consisting, respectively, of the odd j=2g-1 (where g=1, 2, ..., N/2) and the even-numbered elements j=2g E-code, and consists of first and second controllable switches 3.1-3.2 and item AND NOT 3.3. The information input of the first controlled switch 3.1 is connected to the information input of the second controlled switch 3.2 and an information input processing unit coding combinations 3. The first and second inputs of the element AND NOT 3.3 connected to the clock input of the first controlled switch 3.1 and are clocked by the input processing unit coding combinations 3. The output of element AND-NOT 3.3 connected to the clock input of the second controlled switch 3.2, the outputs of the first and second controllable switches 3.1-3.2 are respectively the first and second outputs forming unit coding combinations 3.

Managed switches 3.1-3.2 are used to form respectively the first and second coding combinations. As managed switches can be used vacuum switches presented in the technical description of the product P-161 AM, book 2, sheet 18, the electrical diagram YAR 240.064.73.

Element AND-NOT 3.3 is designed to convert clock pulses. It can be implemented as described in the book Pegarules, Ludsteck “non-linear electronic device. Cha shall be 2” (M: Voenizdat, 1984, s-114, is b, 4.16 b).

Block the formation of additional sequences 4, scheme is presented in figure 4, is designed to generate additional sequences and consists of first and second delay lines 4.1-4.2, driver information sequences 4.3, N-modulators first 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroup of modulators and the first and second N-vchodove adders 4.6-4.7. j-th output of the shaper of information sequences 4.3, where j=1, 2, ..., N, are connected to the managed inputs of the j-th modulators first 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroups of modulators, the outputs of the j-th modulators first 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroups of modulators connected to the j-th inputs, respectively, of the first 4.6 and 4.7 second N-vchodove adders, the j-th outputs of the first 4.1 and 4.2 of the second delay line connected to information inputs of the j-th modulators, respectively, the first 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroup modulators. Clock and informational inputs of the driver information sequences 4.3 are respectively the clock and data inputs of the processing unit additional sequences 4. The first inputs 4.1 and 4.2 second delay lines are respectively the first and second controllable inlet fo the creation of additional series 4. The outputs of the first 4.6 and 4.7 second N-vchodove adders are respectively the first and second information output unit generating additional sequences 4.

Delay lines 4.1-4.2 are used to form ensembles coding combinations respectively from the first and second coding combinations by delaying the corresponding coding combinations on the j-th output of the delay line to (j-1) clock cycles. They can be implemented, as described in the book Lehrerin “communication Systems with noise-like signals” (M.: Radio and communication, 1985, s-361, RIS).

Driver information sequences 4.3 is designed to generate N information sequences by cyclic shift information sequence and increase the information signal duration N times, duration Nτ (wherethe duration element Quaternary-coded combinations). His scheme is known and described in the patent of the Russian Federation No. 2014738, IPC 5 H 04 J 11/00, 10/00, Appl. 18.02.1991, publ. 15.06.1994, 2.

The first modulators 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroup modulators are used to form the coded information sequences. Their scheme is known and described in the patent of the Russian Federation No. 2014738, IPC 5 H 04 J 11/00, 10/00, Appl. 18.02.1991, publ. 15.06.1994, 3 or A.S. No. 1721837 SS is R, IPC 5 H 04 L 27/26, Appl. 08.01.90, publ. 23.03.92, 1.

N-input adders 4.6-4.7 intended for summation signal voltage. They can be implemented, as described in the book Utica, Klenk “Semiconductor circuit” (M.: Mir, 1982, p.137, RIS).

Channels forming optical signals 5₁-5_2,presented in figure 1, are used to form the optical signals from the respective additional sequences and respectively consist of an amplifier-modulator 5.1₁(5.1₂), the laser generator 5.2₁(5.2₂), the stabilizer of the laser power 5.3₁(5.3₂and the matching device 5.4₁(5.4₂). The output of the amplifier-modulator 5.1₁(5.1₂) connected to the information input of the laser generator 5.2₁(5.2₂), the output of which is connected to the inputs of the matching device 5.4₁(5.4₂) and the stabilizer of the laser power 5.3₁(5.3₂). The first and second control outputs of the stabilizer of the laser power 5.3₁(5.3₂) connected respectively to the control inputs, respectively, of the amplifier-modulator 5.1₁(5.1₂and the laser generator 5.2₁(5.2₂). The information input of the amplifier-modulator 5.1₁(5.1₂) and output matching device 5.4₁(5.4₂) are respectively the input and the output of the m channel processing transmitting part 5 ₁(5₂).

Amplifier-modulators 5.1₁-5.1₂designed to enhance the digital signal to the level required for modulation of the laser generator. They can be implemented, as described in the book Linestream and other “Military systems multichannel communication” edited by A.T. Lebedev (HP: YOU, 1979, s-308, RIS).

Laser generators 5.2₁-5.2₂designed to generate an optical carrier in the relevant spectral ranges (boxes transparency). They can be implemented, as described in the book “fundamentals of optical fiber communications” edited Emelianova (M.: Radio and communication, 1980, s-113, RIS, 4.12 (a).

The stabilizers of the laser power 5.3₁-5.3₂designed to maintain the desired power level of laser radiation. It can be implemented as described in the book MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, p.36-39, (figure 1.13)),

Matching device 5.4₁-5.4₂intended for input of the optical signal in the fiber light guide fiber-optic cable. They can be implemented, as described in the book MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, s-193, RIS).

The optical integrator 6 in the transmitting part and 8.5.3 in the receiving part, and the N-shadowy optical combiner 8.7 identical and are designed to combine optical signals. They can be implemented, as described in the book MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, p.194-209, figure 6.10 a, b).

The transmission medium of the optical signal 7 is designed for the propagation of the radiation in the optical range. As a transmission medium of the optical signal can be used single-mode fiber-optic cable. It can be implemented as described in the book “fundamentals of optical fiber communications” edited Emelianova (M.: Radio and communication, 1980, p.71-76, RIS, 2.9) or MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, s.138-139, RIS).

Optical coherent filter 8, a diagram is shown in Fig.7, is designed for complex convolution of the signal at the optical level and consists of a generator of clock pulses 8.1, shaper E-code 8.2, shaper decoding signals 8.3, delay lines 8.4, N-modulators 8.5₁-8.5_N,- phasers on8.6₁-8.6_N/2and N-Vodolaga optical combiner 8.7. The generator output clock pulses 8.1 is connected to the clock input of the shaper decoding signals 8.3 and the input of the shaper E-code 8.2. The output of shaper E-code 8.2 is connected to the information input of the shaper de is deruosi signals 8.3, j-th output of the shaper decoding signals 8.3, connected to the control input of the j-th modulator 8.5₁-8.5_Nthe output of the i-th, where i=1, 3, 5, ..., N-1, modulator 8.5₁-8.5_Nconnected to the input of the i-th phase shifter8.6₁-8.6_N/2the output of the i+1-th modulator 8.5₁-8.5_Nand the output of the i-th phase shifter8.6₁-8.6_N/2connected respectively to the i+1-th and i-th inputs of the N-Vodolaga optical combiner 8.7, j-th output of the delay line 8.4 connected to the information input of the j-th modulator 8.5₁-8.5_Ninformation input of the delay line 8.4 is an information input optical matched filter 8. Output N-Vodolaga optical combiner 8.7 is an information optical output of the matched filter 8.

Shaper decoding signals 8.3 is designed to decode signals by cyclic shift of the elements of the E-code. His scheme is known and described in the patent of the Russian Federation No. 2014738, IPC 5 H 04 J 11/00, 10/00, Appl. 18.02.1991, publ. 15.06.1994, 2.

The delay line 8.4 is intended for formation of the ensemble of optical signals by delaying the optical signal at the j-th output of the delay line to (j-1) clock cycles. It can be implemented as described in the book Lehrerin “communication Systems with noise-like signals” (M.: Radio and communication, 1985, C-36, RIS).

Phasers on8.6₁-8.6_N/2designed to rotate the phase of the optical signal on. They are made on the basis of the directional coupler and may be implemented as described in the book MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, p.194-209, figure 6.10 (b, d).

Modulators 8.5₁-8.5_N, diagram of which is presented in Fig, designed to decode the optical signal composed of optical switch 8.5.1, Phaser π 8.5.2 and optical combiner 8.5.3. The first and second information outputs of the optical switch 8.5.1 connected respectively to the first information input of the optical combiner 8.5.3 and the input of the phase shifter on π 8.5.2. The second information input of the optical combiner 8.5.3 connected to the output of the phase shifter on π 8.5.2. Information and clock inputs of the optical switch 8.5.1 are respectively the information and clock inputs of the modulator 8.5, the output of the optical combiner 8.5.3 is an information modulator output 8.5.

Optical switch 8.5.1 is designed to connect the optical signal to one of the outputs of the optical switch. It can be implemented as described in the book M.M. is Utesov and other “Fiber-optic transmission systems” Ed. by Vigasin (M.: Radio and communication, 1992, s-221, RIS).

Phaser π 8.5.2 to rotate the phase of the optical signal on π. It is made on the basis of two series-connected directional couplers and can be implemented as described in the book MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, p.194-209, figure 6.10 (b, d).

A directional coupler 9 is designed for separation of the optical signal on the direct and the reflected optical signal, characterized in. It can be implemented as described in the book MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, p.194-209, figure 6.10 (b, d).

The processing channels of the optical signal 10₁-10₂presented in figure 1, are designed to handle optical signals and respectively consist of a matching device 10.1₁(10.1₂), the photodetector 10.2₁(10.2₂). The output impedance of the device 10.1₁(10.1₂) is connected to the input of the photodetector 10.2₁(10.2₂), and the input impedance of the device 10.1₁(10.1₂and the output of the photodetector 10.2₁(10.2₂) are respectively the input and output channel processing receiving part 10₁(10₂).

Matching device 10.1₁-10.1₂intended for outputting optical radiation from the fiber fiber fiber-optic cable and pair it with a photodetector. They can be implemented, as described in the book MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, s, RES).

The photodetectors 10.2₁-10.2₂designed to convert an input optical signal into an electrical digital signal. They can be implemented, as described in the book Abiview “Fiber optics: components, transmission systems, dimension (M: Cyrus systems, 1999, s-154, RIS).

MyCitadel 11 is designed for summing the digital signals coming from the outputs of the processing channels of the optical signal, and the formation of a bipolar digital signal. It can be implemented as described in the book Utica, Klenk “Semiconductor circuit” (M.: Mir, 1982, p.137-138, RIS).

Amplifier 12 is designed to enhance the digital signal to the level required for further processing. It can be implemented as described in the book Linestream and other “Military systems multichannel communication” edited Atibaia (HP: YOU, 1979, C-265, RIS, RIS).

The automatic gain control 13 is designed to generate upravlyaushih the voltage to adjust the gain of the amplifier at low level of the input digital signal, ensuring the linearity of the whole path of the digital signal. It can be implemented as described in the book Linestream and other “Military systems multichannel communication” edited Atibaia (HP: YOU, 1979, s-308, RIS).

The optimal filter 14 is used for separation of the useful signal and the effective suppression of any side-Raman oscillations at the input of the decision making unit. It is designed as a low pass filter and can be implemented as described in the book Appalaccia “fundamentals of theory of linear electric circuits” (M.: Communication, 1967, s-596, RIS, RIS).

Crucial unit 15 is designed for decision-making on identification and registration of a single element of the digital signal. It can be implemented as described in the book MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, p.34-36, RIS).

The recovery block clock frequency 16 is designed to highlight clock rate signal from arriving at its input a digital signal. It can be implemented as described in the book MBA and other “Fiber-optic transmission systems” Ed. by Vingativa (M.: Radio and communication, 1992, p.34-36, (figure 1.12)).

The transmission line high-speed digital optical signal presented in figure 1, works as follows.

In the transmitting part of the line re the ACI high-speed digital optical signal clock 1 frequency ƒ _Tggenerates a sequence of clock pulses with a duty cycle equal to one presented on Figure 3, and. Each element of this sequence with a high level of "1" will be considered odd, and with a low level "0" is even. The sequence of clock pulses (Fig 3, a) with a generator of clock pulses 1 are simultaneously fed to the clock inputs of the former (E-code 2, blocks the formation of coding combinations 3 and the formation of additional sequences 4.

The former E-code 2 is formed and driven by the implementation of the original Quaternary-coded combinations (E-code) with period N=2^k(where N is the number of elements in the Quaternary-coded combinations; k≥2 integer). As an example, on the plots (Fig 3, b) shows the cyclic implementation following the original Quaternary-coded combinations α γ β γ β δ β γ when the number of elements N=8, where α=-β, γ=-δand the elements α and β orthogonal γ and δ. This can be, for example, radio frequency photomanipulation the sequence in which the initial phase elements take the values:

Formed the original quadruple-encoded combination (Fig 3,b), consisting of N elements of length Nτ (where - the duration element in the Quaternary-coded combinations), is fed to the controlled input of the processing unit coding combinations 3.

The shaping unit coding combinations 3, presented in figure 2, works as follows. The sequence of clock pulses (Fig 3, a) simultaneously supplied to the first and second information inputs of the element AND NOT 3.3, the output of which is formed an inverted sequence of clock pulses presented on plots 3, V. a Sequence of clock pulses (Fig 3, a, b) is supplied to the monitored inputs of the first 3.1 and 3.2 second controllable switches, respectively. This takes into account that managed switches 3.1-3.2 work according to the following rule:

Thus, under the action of a logical “1” to the controlled input of the control switch 3.1 (3.2) the information input of the control switch 3.1 (3.2) is connected to the output of the controlled switch 3.1 (3.2), and under the influence of logical “0” to the controlled input of the control switch 3.1 (3.2) the information input of the control switch 3.1 (3.2) is not connected to the output of the controlled switch. Thus, the first and second control outputs of the shaping unit coding combinations 3. the : first and second coded combinations, respectively, of the odd (α that β) and even (γ, δ) elements of E-code. An example of the generated first and second coding combinations respectively presented on plots 3, g, D. the First (Figure 3, g) and second (Figure 3, d) encoding combinations respectively receive the first and second driven unit generating additional sequences 4.

Block the formation of additional sequences 4, presented in figure 4, operates as follows. Let the input of the transmission of the transmission line and high-speed optical signal random information sequence represented on plots 5 and. With the arrival of random information sequence is performed synchronously with clock pulses 1, then there ƒ_Tg=Century. Random information sequence (Figure 5, a) is supplied to the information input of the shaper of information sequences 4.3, and the clock input of the driver information sequences 4.3 receives a sequence of clock pulses (Fig 3, a) with a clock speed of 1. Driver information sequences 4.3 share random information sequence (Figure 5, a) on N information sequences, the following shift on the beat, equal τ. Moreover, the duration of which of each information item is increased N times, and duration information element becomes Nτ. J-x outputs (where j=1, 2, ..., N) driver information sequences 4.3 formed the ensemble of information sequences presented on figure 5 plots a, b, ..., I. the Generated information sequence (Figure 5, b,...) with the j-th output driver information sequences 4.3 arrive at the controlled inputs of the respective j-th modulators first 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroups of modulators at the same time.

The first (Figure 3, g) and second (Figure 3, d) encoding combinations respectively received on the first 4.1 and 4.2 second delay line. On the j-th tap of the first 4.1 and 4.2 second delay lines of the first and second coded combinations respectively appear with delay (j-1) clock cycles. Thereby, the ensemble of the first and second coding combinations are presented respectively in plots 5, th,...,s and 5,,..., sh. Formed the first ensemble (Figure 5, th,...,p) and the second (Figure 5, C,...,W) coding combinations supplied to the information inputs of the respective j-th modulators first 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroups of modulators.

The outputs of the modulators of the first 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroups of modulators will be formed ensemble of the first and the second code is reported to the information sequence, presented respectively on plots 6, a,...,C and 6, th,...,R. taking into account that the first modulators 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroups of modulators operate according to the following rule:

modulators 4.4₁-4.4_Nthe first group of modulators according to the rule

modulators 4.5₁-4.5_Nthe second group of modulators according to the rule

Thus, under the action of a logical "0" on the monitored inputs of the modulators at the output of the modulators is formed inverted signal, and under the influence of logical "1" on the controlled inputs of the modulators at the output of the modulators of the generated signal corresponds to the signal on the information inputs of the modulators.

Formed first (Fig.6, a,...,h) and second (6, th,...,R) coded information sequence from the output of the j-th first modulator 4.4₁-4.4_Nand second 4.5₁-4.5_Ngroups of modulators enter the corresponding j-th input of the first 4.6 and 4.7 second N-vchodove adders. The output of the first 4.6 and 4.7 second adder will be formed first and second phase-shift keyed additional sequences, respectively presented on plots 6, and C.

The PE the Wai (6, I) and second (6, C) phase-shift keyed additional sequences are received at the inputs of the corresponding channel forming optical signal 5₁-5₂. In the first channel forming optical signal, the first phase-shift keyed additional sequence (6,) (the digital signal) is supplied to the information input of the amplifier-modulator 5.1₁where is the amplification of the digital signal to the desired value. From the output of the amplifier-modulator 5.1₁the digital signal is supplied to the information input of the laser generator 5.2₁, the output of which is formed an optical signal. The generated optical signal output from the laser generator 5.2₁at the same time it arrives at the inputs of the stabilizer of the laser power 5.3₁and the matching device 5.4₁. Part of the optical signal at the output of the laser generator 5.2₁is used to stabilize the laser power using the stabilizer of the laser power 5.3₁. In the stabilizer of the laser power 5.3₁generated control voltage, with which the first and second control outputs of the stabilizer of the laser power 5.3₁enters the controlled inputs of the amplifier-modulator 5.1₁and the laser generator 5.2₁respectively. In the second channel 5₂forming optical the second signal forming optical signal is similar. The generated optical signal output from the channel forming optical signal 5₁-5₂went to a corresponding input of the optical combiner 6, where combining (multiplexing) optical signals. When this optical signal is presented on plots 6, t, where the orthogonality of the signals (α, β) and (γ, δ) is shown by placing them on different sides of the x-axis.

Optical signal (6, t) from the output of the optical combiner 6 is fed to the input transmission medium of the optical signal 7. Output transmission medium of the optical signal 7 of the optical signal received at the input of optical matched filter 8.

Optical coherent filter 8, is presented on Fig.7, works as follows. Optical signal (6, t) is fed to the delay line 8.4. On the j-th tap of the delay line 8.4 optical signal may be introduced in (j-1) the number of clock cycles. Thereby, the ensemble of optical signals presented on Fig.9 plots, a,...,Z. The generated optical signals (Figure 9, a,...,h) j-x outputs of the delay line 8.4 act on the information inputs of the respective j-x modulators 8.5₁-8.5_N. When this optical signal is split by a power of N branches (with equal power in each branch).

Clock 8.1 frequency ƒ Tggenerates a sequence of clock pulses with a duty cycle equal to one presented on figure 10 plots and. The sequence of clock pulses (Figure 10, a) with a generator of clock pulses 8.1 simultaneously to the input of the shaper E-code 8.2 and the clock input of the shaper decoding signals 8.3.

The former E-code 8.2 is formed and driven by the implementation of the Quaternary-decoder combination (E-code) with period N=2^k. As an example, figure 10 plots a, b, C shown driven by implementation of the following deeparaya combination: α δ β δ α δ α γ when the number of elements N=8, where α=-β, γ=-δand the elements α and β orthogonal γ and δ. This can be, for example, a sequence of pulses, where α=γ=1; β=δ=0.

Formed the quadruple-decoder combination (Figure 10, C) is supplied to the information input of the shaper decoding signals 8.3. With the arrival of the Quaternary-decoder combination is performed synchronously with clock pulses 8.1, that is ƒ_Tg=Century. j-x outputs of the shaper decoding signals 8.3 formed decoding signals corresponding j-th room E-code. Thereby, the ensemble decoding signals presented on figure 10 plots, g,...,K. Strmilov the config ensemble decoding signals (Figure 10, g,...,K) is supplied to the monitored inputs of the respective j-x modulators 8.5₁-8.5_N.

Modulators 8.5₁-8.5_Npresented at Fig and work according to the following rule:

Thus, under the action of a logical “1” to the controlled input of the modulator at the output of the modulator is formed inverted optical signal, and under the influence of logical “0” to the controlled input of the modulator at the output of the modulator formed optical signal corresponds to the optical signal input to the information input of the modulator.

The outputs of the odd j-s modulators 8.5₁-8.5_Nconnected to the respective inputs of the i-th (where i=1, 2, 3,...,N-1) phasers on8.6₁-8.6_N/2. At the outputs of the even-numbered j-s modulators 8.5₁-8.5_Nand the output i-x phasers on8.6₁-8.6_N/2will be formed decoded optical signals, are presented respectively in plots 11, a,...,Z. The generated decoded optical signals (11, a,...,C) are fed to the corresponding j-th inputs of the optical combiner 8.7. In the optical multiplexer 8.7 are combined decoding : CTCSS / DCS is data optical signals. The output of the optical combiner 8.7 formed ACF elements of the information sequence represented on the plots Fig, A.

Thus, in a consistent filter 8 is coherent convolution elements α and β complex signal at the optical level. Convolution Quaternary-coded sequences (codes Welty or E-codes) is characterized by the fact that the aperiodic ACF has a pulse type (no side emission) U_ACF=000000080000000. Convolution of complex optical signal can be represented by the following expressions:

or

where ƒ_n=B - frequency carrier signal; transmission speed (cruising speed), it is expressed by the number of messages transmitted per unit of time, measured in bauds.

Multiplierconsider splitting the optical signal power into equal parts in the delay line 8.4.

ACF elements of the information sequence (hereinafter optical signal) is fed to the input of the directional coupler 9. In a directional coupler 9 with translucent mirror optical signal is split into two branches (with half the power in each branch):

Multiplierconsiders the division of power and the optical signal into equal parts in a directional coupler 9.

Thus, the first information output directional coupler 9 is formed by direct optical signal U_9.1and on the second information output directional coupler 9 is formed by the reflected optical signal U_9.2distinctive. Direct U_9.1and reflected U_9.2optical signals to corresponding inputs of a channel processing of the optical signal 10₁-10₂.

In the first process channel optical signal 10₁direct optical signal U_9.1, is fed to the input of the second matching device 10.1₁from the output of which is fed to the input of the photodetector 10.2₁. At the output of the photodetector 10.2₁formed the digital signal presented on the plots Fig, b. In the second processing channel of the optical signal 10₂processing the reflected optical signal U_9.2going the same way. At the output of the photodetector 10.2₂formed the digital signal presented on the plots Fig, C.

Due to the fact that the elements of the Quaternary-coded sequence α and β orthogonal γ and δon the outputs of the respective photodetectors 10.2₁and 10.2₂responses to “alien” signals is equal to zero, i.e. at the output of the first photodetector 10.2₁Uβ=0, Uγ=0 and Uδ=0, and the output of the second the second photodetector 10.2 ₂Uα=0, Uγ=0 and Uδ=0.

Formed first (Fig, b) and second (Fig, a digital output signal of the first 10₁and the second 10₂channel processing of the optical signal received respectively in the first and second inputs of vicites 11. Output vicites 11 is formed total digital signal presented on the plots Fig, he Formed a total digital signal (Fig, g) from the output of vicites 11 is fed to the input of amplifier 12 for the primary amplification of the digital signal. From the output of the amplifier 12, the digital signal is simultaneously fed to the input of the automatic gain control 13 and the optimal filter 14. In the automatic gain control 13 is formed by the control voltage, which is supplied to the control input of the amplifier 12 to automatically control the gain of the amplifier 12 at a weak level of the input digital signal, providing the linearity of the whole path of the digital signal. In the optimal filter 14 is the selection of the useful digital signal and an effective suppression of side combinational components of the digital signal. Output the optimal filter 14 digital signal is simultaneously supplied to the information input unit of recovery clock frequency 16 and the input of the decision making unit 15. On the control input of casting the Loka 15 signal from block recovery clock frequency 16, it restores the original clock intervals of the transmitted digital signal. Crucial unit 15 restores the original shape and the amplitude of the signal and its temporary location on the clock interval. The decision in the final block 15 is made with a zero threshold, that is, by law, the voltage at the output of the optimal filter, the reference time received from the clock recovery block frequency 16. The output transmission line of high-grade digital optical signal generated information sequence represented on the plots of Fig. 12, d, the data sequence is delayed by a time τ(N-1).

Consequently, through the use of complex signal based on the Quaternary-kodirovannykh sequences for coherent bundle on which the optical level is an increase in the amplitude of the optical signal at the input of the photodetectoragain, the increase of the amplitude of the optical signal at the input of the photodetector provides increased noise immunity of fiber-optic transmission line or at the required noise immunity may increase the length of the transmission line high-speed digital optical signal.

Thus, the proposed transmission line high-speed wholesale the ical signal provides an extended field of application due to increased noise immunity and increase the length of the line connection to the local network, as well as the length of the regeneration section on the trunk and intra-zone communication networks through the use of complex signals.

1. The transmission line high-speed digital optical signal containing the transmission of the first channel forming optical signal, the input of the transmitting part is the input transmission line, and the output of the transmit side via the transmission medium of the optical signal connected to the input of the receiving part, which includes the first channel processing of the optical signal amplifier, a control input which is connected to the output of automatic gain control, the input of which is connected to the output of the amplifier and the input of the optimal filter, the output of which is connected to the information input of the decision making unit and the input unit of recovery clock frequency, the output of which is connected to the control input of the decision making unit, the output of which is output a transmission line, characterized in that it further imposed on the transmit side is identical to the first, the second channel forming optical signal, clock, driver E-code, blocks the formation of coding combinations, generating additional sequences and an optical combiner, the output of the clock connected to the clock inputs of the blocks forming the coding combined the Nations and the formation of additional sequences to the input of the shaper E-code the output of which is connected to the information input processing unit coding combinations, the first and second control outputs of which are connected respectively to the first and second control inputs of the processing unit of additional sequences, the information input which is the input transmission line, the first and second information output unit generating additional sequences are connected to the inputs respectively of the first and second channels forming optical signal, the outputs of which are connected respectively to the first and second information inputs of the optical combiner whose output is the output of the transmitting part and the receiving part further introduced identical to the first, the second channel of the optical signal processing, optical coherent filter, a directional coupler and myCitadel, the input optical matched filter is the input of the receiving part, and its output connected to the input of the directional coupler, the first and second information outputs of which are connected to the inputs respectively of the first and second processing channels of the optical signal, the outputs of which are connected respectively to the first and second information inputs myCitadel, the output of which is connected to the information input videoseries.

2. Line PE is Adachi according to claim 1, characterized in that each channel forming optical signal transmitting part comprises a laser generator of the stabilizer of the laser power, matching devices and amplifier-modulator, the output of which is connected to the information input of the laser generator, the output of which is connected to the input matching unit and the stabilizer of the laser power, and the first and second control outputs of the stabilizer of the laser power is connected respectively to the control inputs, respectively, of the amplifier-modulator and the laser generator, and the information input of the amplifier-modulator and the output impedance of the device are respectively the input and output channel processing transmitting part.

3. The transmission line according to claim 1 or 2, characterized in that each processing channel of the optical signal receiving part consists of a photodetector and a matching device, the output of which is connected to the input of the photodetector and the input matching unit and the output of the photodetector are respectively the input and output channel processing receiving part.

4. The transmission line according to any one of claims 1 to 3, characterized in that the shaping unit coding combinations consists of the first and second controllable switches and item AND IS NOT, the information input of the first controlled switch is connected to the information input of the second controlled switch and an information input processing unit coding combinations, and the first and second inputs of the element AND IS NOT connected to the clock input of the first controlled switch and are clocked by the input processing unit coding combinations, the output element AND IS NOT connected to the clock input of the second controlled switch, the output of the first and second controllable switches are respectively the first and second outputs forming unit coding combinations.

5. The transmission line according to any one of claims 1 to 4, characterized in that the power generating additional sequences consists of a driver information sequences, the first and second delay lines, each of which is equipped with N outputs, where N=2^k, k≥2 is an integer, the first and second groups of modulators of N modulators in each group, the first and second N-vchodove adders, j-th output of the shaper information sequence, where j=1, 2, ...,N, are connected to the managed inputs of the j-th modulators of the first and second groups of modulators, the outputs of the j-th modulators of the first and second groups of modulators connected to the j-th inputs respectively of the first and second N-vchodove adders, j-e outputs of the first and second delay lines connected to information inputs j-x modulators, respectively, the first and second groups of modulators, quantum and information inputs of the driver information consistently the TEI are respectively the clock and data inputs of the block, the inputs of the first and second delay lines are respectively the first and second controllable inputs of the block, the outputs of the first and second N-vchodove adders are respectively the first and second information outputs of the block.

6. The transmission line according to any one of claims 1 to 5, characterized in that the coherent optical filter consists of a generator of clock pulses, shaper E-code, shaper decoding signals, a delay line, equipped with N outputs, N modulators, N/2 phasers on π/2 and N-Vodolaga optical combiner, the output of the clock connected to the clock input of the shaper decoding signals and the input of the shaper E-code, the output of which is connected to the information input of the shaper decoding signals, the j-th output of the shaper decoding signals connected to the control input the j-th modulator, the output of the i-th, where i=1, 3, 5, ..., N-1, a modulator connected to the input of the i-th phase shifter on π/2, the output of the i+1-th modulator and the output of the i-th phase shifter - connected respectively to the i+1-th and i-th inputs of the N-Vodolaga optical combiner, the j-th output of the delay line is connected to the information input of the j-th modulator, the information input of the delay line is an information input optical matched filter, and the output of the N-Vodolaga optical combiner one is camping information output optical matched filter.

7. The transmission line according to any one of claims 1 to 5, characterized in that the modulator comprises an optical switch, Phaser π and an optical combiner, the first and second information outputs of the optical switch are connected respectively to the first information input of the optical combiner and the input of the phase shifter on πand the second information input of the optical combiner connected to the output of the phase shifter on π, information and clock inputs of the optical switch are respectively the information and clock inputs of the modulator, the output of the optical combiner is an information modulator output.