RU2315428C9 - System for transmitting data with multi access and time division of channels - Google Patents

Abstract

FIELD: communications engineering, possible use in data transmission systems with multi-access and time division of channels.

SUBSTANCE: device contains transmitting parts of client stations, receiving part of central station, where each transmitting part of client station contains generator of clock impulse (1), timer (2), information source (3), generator of information signal (4), block for generating sub-streams (5), first and second channels for generating quartile-encoded signals (6.1-6.2), adder (7), modulator (8), transmitter (9), transmitting antenna (10), frequency synthesizer (11) and generator of pseudo-random numbers (12), and receiving part of central station contains demodulator (14), signal selector (15), block for selecting additional series (16), first and second channels for processing quartile-encoded signals (17.1-17.2), combining device (18), frequency synthesizer (19), generator of pseudo-random numbers (20).

EFFECT: increased traffic capacity.

4 cl, 11 dwg, 1 tbl

Description

The invention relates to communication technology and can be used in systems for transmitting and collecting data with multiple access and time division of channels using the propagation of electromagnetic waves in communication channels with unstable signal parameters (phase, amplitude and polarization) of the meter and decameter wavelength ranges with pseudo-random tuning of the working frequency (MFC) when exposed to intentional interference.

The well-known time-division multiple access system described in the book of Borisov V.A. "Radio engineering information transmission systems." (M .: Radio and communications, 1990, p. 227-232), contains, like the proposed transmission system with multiple access and time division of channels, transmitters of earth stations and a repeater similar to the proposed system. At the same time, in a known system, each correspondent transmits its information signal in a system operating time specially allocated for it.

The disadvantage of this time-division multiple access system is its low bandwidth and noise immunity when deliberate interference occurs at fixed frequencies, as well as the relatively low reliability in communication channels with unstable signal parameters (phase, amplitude and polarization) of the meter and decameter wavelength ranges , as well as inefficient use of transmitter power, which limits the scope of this system.

Known multiple-access data transmission system with time division of correspondents according to the patent of the Russian Federation No. 2012143, IPC ⁷ Н04В 7/12, decl. 03/29/91, publ. 04/30/94, contains, like the proposed transmission system with multiple access and time division of channels, N = 2 ^k (where k≥2 is an integer; j = 1, 2, ..., N is the number of the transmitting part of the subscriber station) transmitting parts of subscriber stations, each of which contains an information source, a quad-coded sequence generator, a transmitter, a transmitting antenna, a synchronizer, a clock and a receiving part of a central station that contains a receiving antenna, a quad-coded radio signal receiving unit, an inform receiver tion similar to the proposed system. Moreover, in the known system, four-coded sequences (E-codes, Welty codes) are used to transmit information that do not have side outliers in the aperiodic autocorrelation function (ACF).

The disadvantage of this system of data transmission with multiple access with time division of correspondents is its low bandwidth and noise immunity when exposed to deliberate interference when operating at fixed frequencies, as well as the relatively low reliability in radio channels with unstable signal parameters (phase, amplitude and polarization) meter and decameter wavelengths, which limits the scope of this system.

The closest in technical essence and the functions performed to the claimed data transmission system with multiple access and time division of channels analog (prototype) is a data transmission system with multiple access and time division of channels, see RF patent No. 2240653, IPC ⁷ Н04В 7/12, declared 04/21/03, publ. 11/20/04. The known transmission system with multiple access and time division of channels contains, like the proposed transmission system with multiple access and time division of channels, N transmitting parts of subscriber stations, each of which contains a clock generator, clock, information source, information signal shaper, encoder shaper signal, signal generator of double frequency manipulation, modulator, transmitter, transmitting antenna, frequency synthesizer, pseudorandom generator numerical numbers and the receiving part of the central station, which contains a receiving antenna, a demodulator, a signal selector, an additional sequence extraction unit, a first two-channel matched filter, a first subtractor, a first information receiver, a frequency synthesizer, a pseudo-random number generator and a clock generator similar to the proposed system.

Moreover, in the known data transmission system with multiple access and time division of channels, as in the proposed data transmission system with multiple access and time division of channels, in each transmitting part of the subscriber station, an information source, an information signal shaper, an encoded signal shaper, a shaper are connected in series signals of double frequency manipulation, modulator, transmitter and transmitting antenna. The output of the clock generator is jointly connected to the clock inputs of the chronizer, information signal shaper, coded signal shaper, double frequency shift signal shaper, pseudo random number generator and frequency synthesizer. The output of the chronizer is jointly connected to the control input of the driver of the information signal and the clock input of the information source. Moreover, n control outputs of the pseudo-random number generator, where n≥2, are connected to the corresponding n control inputs of the frequency synthesizer, the output of which is connected to the modulating input of the modulator. The receiving part of the central station, as in the proposed data transmission system with multiple access and time division of channels, contains a receiving antenna, the output of which is connected to the information input of the demodulator. The output of the demodulator is connected to the input of the signal selector, the first, second, third and fourth information outputs of which are connected respectively to the first, second, third and fourth information inputs of the block for selecting additional sequences. The first and second information outputs of the additional sequences extraction unit are connected respectively to the first and second information inputs of a two-channel matched filter, the first and second information outputs of which are connected respectively to the first and second information inputs of the subtractor. The output of the subtractor is connected to the input of the information receiver. The output of the clock generator is jointly connected to the clock inputs of the frequency synthesizer and the pseudo random number generator. Moreover, the n control outputs of the pseudo random number generator are connected to the corresponding n control inputs of the frequency synthesizer, the output of which is connected to the modulating input of the demodulator.

A data access system with multiple access and time division of channels - a prototype - uses four-coded sequences (E-codes, Velty codes) with double frequency shift keying and frequency hopping for transmitting an information signal, where the odd elements of a four-coded sequence are transmitted at frequencies f ₃ + f _{frequency hopping} or f ₄ + f _{frequency hopping,} and even elements quaternary-coded sequence transmitted on frequencies f ₁ + f ₂ f _{frequency hopping} or _{frequency hopping} + f, i.e. nominal frequency determines the number of additional serial- The four-coded radio signal.

The disadvantage of this data transmission system with multiple access and time division of channels is its low bandwidth, which limits the scope of this system. This is due to the inefficiency of using the frequency resource.

The objective of the invention is to develop a data transmission system with multiple access and time division of channels, ensuring the achievement of a technical result, which consists in expanding the scope by using diversity reception, implemented on the condition of orthogonality in the code structure of the quad-coded sequences with frequency hopping, which convolution occurs interference compensation, resulting in increased system throughput without expansion often tnogo resource. The invention is intended for data transmission systems with code compression of signals and data transmission systems with multiple access and time division multiplexing.

A data system with multiple access and time division of channels contains N transmitting parts of subscriber stations and a receiving part of a central station. At the same time, each transmitting part of the subscriber station contains a clock pulse generator, the output of which is jointly connected to the clock inputs of the information signal shaper, the first channel for generating the four-coded signals, a frequency synthesizer, a pseudorandom number generator and a chronizer. The output of the chronizer is jointly connected to the control input of the driver of the information signal and to the clock input of the information source. The output of the information source is connected to the information input of the driver of the information signal, the output of which is connected to the input of the transmitter, the output of the transmitter is connected to the input of the transmitting antenna. Moreover, n control outputs of the pseudo-random number generator, where n≥2, are connected to the corresponding n control inputs of the frequency synthesizer, the output of which is connected to the modulating input of the modulator. The receiving part of the central station contains a receiving antenna, the output of which is connected to the information input of the demodulator. The output of the demodulator is connected to the input of the signal selector, the first, second, third and fourth information outputs of which are connected respectively to the first, second, third and fourth information inputs of the block for selecting additional sequences. The first and second information outputs of the additional sequences extraction unit are connected respectively to the first and second information inputs of the first channel for processing the quad-coded signals. The output of the clock generator is jointly connected to the clock inputs of the frequency synthesizer and the pseudo random number generator. Moreover, the n control outputs of which are connected to the corresponding n control inputs of the frequency synthesizer, the output of the frequency synthesizer is connected to the modulating input of the demodulator.

The technical result in the implementation of the invention — an increase in the information transfer rate of the system or the possibility of increasing reliability in the repeated transmission of information pulses — is achieved by introducing into each transmitting part of the subscriber station a sub-stream generating unit identical to the first of the second channel of generating four-coded signals and an adder, and to the receiving part of the central station introduction identical to the first of the second channel processing of the quad-coded signals and combiner. At the same time, in the receiving part, the output of the driver of the information signal is connected to the information input of the sub-stream generation unit, the first and second information outputs of which are respectively connected to the information inputs of the first and second channels for generating the quad-coded signals. The output of the clock generator is also jointly connected to the clock inputs of the sub-stream generating unit and the second channel for generating the quad-coded signals. The outputs of the first and second channels of the formation of the quaternary-encoded signals are respectively connected to the first and second information inputs of the adder, the output of which is connected to the information input of the modulator. In this case, the first and second information outputs of the additional sequence extraction unit are also connected respectively to the first and second information inputs of the second channel for processing the quad-coded signals, N information outputs of which are connected to the corresponding from the N + 1 through 2N information inputs of the combining device, and N information outputs of the first channel for processing the quaternary encoded signals are connected to the corresponding from the 1st to the Nth information inputs of the combining device, N information The outputs of the combining device are N information outputs of the receiving part of the central station.

выход дешифратора совместно подключен ко вторым управляющим входам первого и второго электронных ключей. Информационный вход первого электронного ключа является информационным входом блока формирования субпотоков. Первый и второй информационные выходы первого электронного ключа соответственно подключены к информационным входам первого и второго D-триггеров, а первый и второй информационные выходы второго электронного ключа соответственно подключены к тактовым входам первого и второго D-триггеров. Выходы первого и второго D-триггеров соответственно являются первым и вторым информационными выходами блока формирования субпотоков.The sub-stream generation unit may consist, for example, of a clock counter, a decoder, first and second electronic keys, first and second D-flip-flops. The input of the clock counter and the information input of the second electronic key are connected together and are the clock input of the sub-stream generation unit. In this case, the k counted outputs of the clock counter are connected to the k information inputs of the decoder. The first output of the decoder is jointly connected to the first control inputs of the first and second electronic keys,

the decoder output is jointly connected to the second control inputs of the first and second electronic keys. The information input of the first electronic key is the information input of the sub-stream generation unit. The first and second information outputs of the first electronic key are respectively connected to the information inputs of the first and second D-flip-flops, and the first and second information outputs of the second electronic key are respectively connected to the clock inputs of the first and second D-flip-flops. The outputs of the first and second D-flip-flops are respectively the first and second information outputs of the sub-stream generation unit.

The first and second channels for generating quaternary-encoded signals may consist, for example, of a encoder of a coded signal and a driver of signals of twofold frequency manipulation. In this case, the information input of the channel for generating the quadruple-encoded signals is the information input of the encoder of the encoded signals, the output of which is connected to the information input of the signal generator of the double frequency manipulation. The output of the signal driver of the double frequency manipulation is the output of the channel for the formation of the four-coded signals. The clock inputs of the encoder and the dual-frequency signal driver are combined and are the clock input of the channel for generating the quad-coded signals.

The first and second channels for processing the quaternary-encoded signals may consist, for example, of a two-channel matched filter, a subtractor, and an information receiver. In this case, the first and second information inputs of the channel for processing the quad-coded signals are respectively the first and second information inputs of a two-channel matched filter, the first and second information outputs of which are respectively connected to the first and second information inputs of the subtractor. The output of the subtractor is connected to the input of the information receiver, N information outputs of which are N information outputs of the channel for processing the quad-coded signals.

By introducing into the transmitting part of each subscriber station a sub-stream generating unit, a second channel for generating quaternary-encoded signals (in which a four-coded signal is generated orthogonal in code structure) and an adder, and in the receiving part of the central station of the second channel for processing four-coded signals (which tuned to a four-coded signal orthogonal in code structure) and the combining device provides the opportunity to increase the information speed Transferring the system or increase the reliability of a result of the duplicated information transmission pulses. An increase in the information transfer rate of the system or an increase in reliability as a result of the duplicated transmission of information pulses without expanding the frequency resource and reducing the system throughput is achieved due to the diversity of the reception of four-coded sequences orthogonal in the code structure (E-codes, Welty codes). In the first and second channels for generating quaternary-encoded signals, the formation of quaternary-encoded signals from odd and even information signals, respectively, and in the first and second channels for processing quaternary-encoded signals, the operations of convolution of the quaternary-encoded information sequence are implemented in the form of the implementation of the ACF and the correlation function (VKF). In this case, the ACF is pulsed in nature without lateral emissions (U _ACF = 000000080000000 at N = 8), and the VKF is zero (U _VKF = 000000000000000 at N = 8). Using the condition of orthogonality in the code structure of the quaternary-encoded sequences makes it possible to compensate for mutual interference in the first and second channels of processing the quaternary-encoded signals (implementation of the VCF).

The analysis of the prior art by the applicant, including a search by patent and scientific and technical sources of information and identification of sources containing information about analogues of the claimed invention, allowed to establish that the applicant did not find an analogue characterized by features identical to all the essential features of the claimed invention. The selection from the list of identified analogues of the prototype as the closest in the set of essential features of the analogue made it possible to identify the set of essential distinguishing features in relation to the applicant's technical result in the claimed device set forth in the claims. Therefore, the claimed invention meets the criterion of "novelty."

To verify compliance of the claimed invention with the criterion of "inventive step", the applicant conducted an additional search for known solutions in order to identify signs that match the distinctive features of the claimed device from the prototype. The search results showed that the claimed invention does not follow for a specialist explicitly from the prior art determined by the applicant. The effect of the transformations provided for by the essential features of the claimed invention on the achievement of a technical result is not revealed. In particular, the claimed invention does not provide for the following transformations: the addition of a known product with any known part, attached to it according to known rules, to achieve a technical result in respect of which the effect of such additions is established; the replacement of any part of a known product with another known part to achieve a technical result in respect of which the effect of such a replacement is established; the exclusion of any part of the funds with the simultaneous exclusion of the function due to its presence and the achievement of the usual result for such exclusion; the increase in the same type of elements to enhance the technical result due to the presence in the tool of just such elements; the implementation of a known tool or part of a known material to achieve a technical result due to the known properties of the material; the creation of a tool consisting of known parts, the choice of which and the connection between them are based on known rules, recommendations and the technical result achieved in this case is due only to the known properties of the parts of this object and the relationships between them; a change in the quantitative features or the relationship of the features, if the fact of the influence of each of them on the technical result is known and new values of the features or their relationship could be obtained from known dependencies. Therefore, the claimed invention meets the criterion of "inventive step".

The invention is illustrated by drawings, which depict: figure 1 is a structural diagram of a data transmission system with multiple access and time division of channels; figure 2 is a structural diagram of a block for the formation of substreams; figure 3 - diagrams explaining the principle of formation of elongated information signals from N transmitting parts of subscriber stations; figure 4 - diagrams explaining the principle of formation of substreams from N transmitting parts of subscriber stations; 5 is a plot explaining the principle of the formation of the quaternary-coded radio signals from N transmitting parts of subscriber stations; 6 is a plot explaining the principle of the formation of complex Quaternary-encoded radio signals from N transmitting parts of subscriber stations; 7 is a plot explaining the principle of forming a group radio signal with frequency hopping, consisting of N subscriber complex quaternary-coded radio signals; Fig.8 is a plot explaining the principle of the formation of the first and second additional sequences; Fig.9 is a plot explaining the principle of convolution of the quaternary-encoded information sequences from N transmitting parts of the subscriber stations and the formation of N information channels from odd information pulses; figure 10 - diagrams explaining the principle of convolution of the quaternary-encoded information sequences from N transmitting parts of the subscriber stations and the formation of N information channels from even information pulses; 11 is a diagram illustrating the principle of combining the odd and even information pulses from N transmitting parts of the subscriber stations and the formation of N information channels.

The data transmission system with multiple access and time division of channels, presented in figure 1, consists of N = 2 ^k transmitting parts of subscriber stations and the receiving part of the central station. At the same time, each transmitting part of the subscriber station contains a clock generator 1, the output of which is jointly connected to the clock inputs of the information signal generator 4, the sub-stream generation unit 5, the first 6.1 and the second 6.2 channels of the formation of the four-coded signals, the frequency synthesizer 11, the pseudo random number generator 12 and chronizer 2. The output of chronizer 2 is jointly connected to the control input of the driver of the information signal 4 and to the clock input of the information source 3. The output of the information source 3 is connected to the information input of the information signal shaper 4. The output of the information signal shaper 4 is connected to the information input of the sub-stream generating unit 5, the first and second information outputs of which are respectively connected to the information inputs of the first 6.1 and second 6.2 channels for generating the four-coded signals. The outputs of the first 6.1 and second 6.2 channels for generating quadruple-encoded signals are respectively connected to the first and second information inputs of the adder 7, the output of which is connected to the information input of the modulator 8. The output of the modulator 8 is connected to the input of the transmitter 9, the output of the transmitter 9 is connected to the input of the transmitting antenna 10 . Moreover, n control outputs of the pseudo random number generator 12, where n≥2, are connected to the corresponding n control inputs of the frequency synthesizer 11, the output of which is connected to the modulating input of the modulator a 8. In the receiving part of the central station, the output of the receiving antenna 13 is connected to the information input of the demodulator 14, the output of the demodulator 14 is connected to the input of the signal selector 15, the first, second, third, and fourth information outputs of which are connected to the first, second, third, and fourth information the inputs of the block allocating additional sequences 16. The first information output of the block allocating additional sequences 16 is jointly connected to the first information inputs of the first 17.1 and second 17.2 channels of processing the quad-coded signals. The second information output of the additional sequences extraction unit 16 is jointly connected to the second information inputs of the first 17.1 and second 17.2 channels of processing the quad-coded signals. At the same time, N information outputs of the first channel for processing the quaternary-encoded signals 17.1 are connected to the corresponding from the 1st to Nth information inputs of the combiner 18, and N information outputs of the second channel for the processing of the quad-encoded signals 17.2 are connected to the corresponding with N + 1- on the 2Nth information inputs of the combining device 18, N information outputs of the combining device 18 are N information outputs of the receiving part of the central station. The output of the clock generator 21 is jointly connected to the clock inputs of the frequency synthesizer 19 and the pseudo random number generator 20. In this case, n control outputs of the pseudo random number generator 20 are connected to the corresponding n control inputs of the frequency synthesizer 19, the output of which is connected to the modulating input of the demodulator 14.

The clock generators 1 in the transmitting part and 21 in the receiving part are identical and are designed to generate clock pulses with the required frequency f _tg = V (where B is the transmission speed of the sequence of E-code elements (technical speed), it is expressed by the number of parcels transmitted per unit time, measured in bits / s). They can be implemented, as described in the book of L.M. Goldenberg, Yu.T. Butylsky, M.Kh. Polyak "Digital devices on integrated circuits in communication technology" (M .: Communication, 1979, p. 72-76, fig. 3.14).

работы системы (где Т_и - интервал времени появления разрешающих импульсов; N - число элементов в четверично-кодированной последовательности). В качестве хронизатора может быть использована комбинация элементов, состоящая из последовательно соединенного двоичного счетчика и дешифратора. При этом q-й выход дешифратора (где q=1,2,...,N) является выходом хронизатора j-й передающей части абонентской станции в соответствии с равенством q=j. Также

и т.д. выходы дешифратора соединены между собой. Данная схема может быть реализована, как описано в книге П.Г.Королев, Л.Д.Стащук «Нелинейные радиотехнические устройства. Часть 2» (М.: Воениздат, 1984, с.267-270, рис.9.12г).Chronizer 2 is designed to generate enabling pulses in a given time interval for each specific j-th transmitting part of the subscriber station per cycle

the operation of the system (where T _and is the time interval for the occurrence of resolving pulses; N is the number of elements in a four-coded sequence). A combination of elements consisting of a series-connected binary counter and a decoder can be used as a chronizer. In this case, the qth output of the decoder (where q = 1,2, ..., N) is the output of the chronizer of the jth transmitting part of the subscriber station in accordance with the equality q = j. Also

etc. decoder outputs are interconnected. This scheme can be implemented, as described in the book by P.G. Korolev, L.D. Stashchuk "Non-linear radio engineering devices. Part 2 ”(Moscow: Military Publishing House, 1984, p. 267-270, fig. 9.12g).

в заданный интервал времени

для каждой конкретной j-й передающей части абонентской станции за цикл Т_ц работы системы. В качестве источника информации может быть использована аппаратура передачи дискретной информации с постоянной технической скоростью передачи.Information source 3 is designed to generate an information signal with a duration of

at a given time interval

for each specific j-th transmitting part of the subscriber station per cycle T _c of the system. As a source of information, discrete information transmission equipment with a constant technical transmission rate can be used.

. Его схема известна и описана в патенте РФ №2240653, МПК⁷ Н04В 7/12, заявл. 21.04.03, опубл. 20.11.04.The driver of the information signal 4 is designed to form an elongated information signal with a pulse duration equal to

. Its scheme is known and described in RF patent No. 2240653, IPC ⁷ Н04В 7/12, decl. 04/21/03, publ. 11/20/04.

выход дешифратора 5.2 совместно подключен ко вторым управляющим входам первого 5.3 и второго 5.4 электронных ключей. Информационный вход первого электронного ключа 5.3 является информационным входом блока формирования субпотоков 5. Первый и второй информационные выходы первого электронного ключа 5.3 соответственно подключены к информационным входам первого 5.5 и второго 5.6 D-триггеров, а первый и второй информационные выходы второго электронного ключа 5.4 соответственно подключены к тактовым входам первого 5.5 и второго 5.6 D-триггеров. Выходы первого 5.5 и второго 5.6 D-триггеров соответственно являются первым и вторым информационными выходами блока формирования субпотоков 5.The sub-stream generating unit 5, the circuit of which is shown in FIG. 2, is designed to form the first and second sub-streams from the odd and even information pulses, respectively, with a pulse duration of Nτ. It consists of a clock counter 5.1, a descrambler 5.2, the first and second electronic keys 5.3-5.4, the first and second D-flip-flops 5.5-5.6. The input of the clock counter 5.1 and the information input of the second electronic key 5.4 are connected together and are the clock input of the sub-stream generation unit 5. In this case, the k counted outputs of the clock counter 5.1 are connected to the k information inputs of the decoder 5.2. The first output of the decoder 5.2 is jointly connected to the first control inputs of the first 5.3 and second 5.4 electronic keys, and

the output of the decoder 5.2 is jointly connected to the second control inputs of the first 5.3 and second 5.4 electronic keys. The information input of the first electronic key 5.3 is the information input of the sub-stream generation unit 5. The first and second information outputs of the first electronic key 5.3 are respectively connected to the information inputs of the first 5.5 and second 5.6 D-flip-flops, and the first and second information outputs of the second electronic key 5.4 are respectively connected to clock inputs of the first 5.5 and second 5.6 D-flip-flops. The outputs of the first 5.5 and second 5.6 D-flip-flops, respectively, are the first and second information outputs of the sub-stream generating unit 5.

The clock counter 5.1 is designed to count clock pulses and generate a binary parallel code of its current state. The maximum state of the counter of the clock counter 5.1 can reach N. In this case, the state change of the counter of clock pulses 5.1 occurs on the positive and negative edges of the clock pulses. It can be implemented, as described in the book by N.L. Teplov, E.N. Kudelin, O.P. Lezhniuk "Non-linear radio engineering devices. Part 1 ”(M .: Military Publishing House, 1982, p. 266-270, fig. 9.12a, b).

Decoder 5.2 is designed to convert a binary parallel code of the current state of the counter into a tithe code. It can be implemented, as described in the book by N.L. Teplov, E.N. Kudelin, O.P. Lezhniuk "Non-linear radio engineering devices. Part 1 ”(M .: Military Publishing House, 1982, p. 246-249, Fig. 9.1a, b).

The first electronic key 5.3 is designed to switch the information signal to the information inputs of the first 5.5 or second 5.6 D-flip-flops. The second electronic key 5.4 is designed to switch the clock pulses to the clock inputs of the first 5.5. or the second 5.6 D-flip-flops. They can be implemented, for example, on 555KP12 microcircuits, as described in the book by G.R. Avanesyan, V.P. Levshin "Integrated microcircuits TTL, TTLSh: Reference book" (M .: Mashinostroenie, 1993, p. 127).

The first and second D-flip-flops 5.5-5.6 are designed to form the first and second substreams from odd and even elongated information pulses. They can be implemented, as described in the book by N.L. Teplov, E.N. Kudelin, O.P. Lezhniuk "Nonlinear Radio Engineering Devices. Part 1 ”(M .: Military Publishing House, 1982, p.171-174, Fig. 5.23).

The first and second channels for generating quaternary-encoded signals 6.1-6.2, the scheme of which is presented in figure 1, are intended for generating quaternary-encoded information signals from the corresponding substreams. They respectively consist of a coded signal conditioner 6.1.1 (6.2.1) and a signal generator of double frequency manipulation 6.1.2 (6.2.2). In this case, the information input of the channel for generating quaternary-coded signals 6.1 (6.2) is the information input of the encoder 6.1.1 (6.2.1), the output of which is connected to the information input of the signal shaper double frequency manipulation 6.1.2 (6.2.2). The output of the dual-frequency-shift keying signal generator 6.1.2 (6.2.2) is the output of the channel for generating the quad-coded signals 6.1 (6.2). The clock inputs of the encoder 6.1.1 (6.2.1) encoder and the dual frequency shift signal generator 6.1.2 (6.2.2) are combined and are the clock input of the quad-coded signal generation channel 6.1 (6.2).

Shapers of the encoded signal 6.1.1-6.2.1 are designed to generate the corresponding orthogonal quaternary-encoded information signals of duration Nτ. Their circuit is known and described in RF patent No. 2240653, IPC ⁷ Н04В 7/12, decl. 04/21/03, publ. 11/20/04.

Shapers of signals of double frequency manipulation 6.1.2-6.2.2 are intended for the formation of four-coded radio signals. They can be implemented, as described in the book by N.L. Teplov, E.N. Kudelin, O.P. Lezhniuk "Nonlinear Radio Engineering Devices. Part 1 ”(M .: Military Publishing House, 1982, p. 344-344, Fig. 8.42).

The adder 7 is designed to sum the quaternary-coded radio signals generated from the first and second substreams. It can be implemented as described in the book by W. Tice, K. Schenk “Semiconductor circuitry” (M .: Mir, 1982, p.137, fig. 11.1).

Modulator 8 is designed for pseudo-random tuning of the operating frequency within the allocated frequency resource Δf = f _max -f _min (where f _max is the maximum value of the selected frequency range; f _min is the minimum value of the selected frequency range). It can be implemented, as described in the book by N.L. Teplov, E.N. Kudelin, O.P. Lezhniuk "Non-linear radio engineering devices. Part 1 ”(M .: Military Publishing House, 1982, p.130-137, Fig.4.29).

The transmitter 9 is designed to amplify the four-coded radio signal to the required power. Any transmitter manufactured by the industry can be used as a transmitter, for example, a transmitter included in the set of the R-161A2M radio station.

The transmitting antenna 10 is designed to convert the energy of high-frequency currents in the antenna-feeder path into the energy of freely propagating electromagnetic waves. As the transmitting antenna, any transmitting antenna that is included with the R-161A2M radio station can be used.

Frequency synthesizer 11, in the transmitting portion and receiving portion 19 are identical and designed for generating pseudo harmonic oscillation denominated _hopping frequency Δf = 4lf _n (where l = 1, 2, ..., L; L = 2 ⁿ -1 - maximum pseudo-random number in decimal code, n≥2 is the number of controlled inputs of the frequency synthesizer). Their circuit is known and described in RF patent No. 2240653, IPC ⁷ Н04В 7/12, decl. 04/21/03, publ. November 20, 04 or in RF patent No. 2208915, IPC ⁷ Н04К 3/00, decl. 11/04/02, publ. 07/20/03.

(где n≥2- число управляющих выходов генератора, псевдослучайных чисел; ΔF_c=4B - эффективная ширина спектра четверично-кодированного радиосигнала;

- меньшее целое число). Они могут быть реализованы, как описано в книге У.Тице, К.Шенк «Полупроводниковая схемотехника» (М.: Мир, 1982, с.356-359, рис.20.20).The pseudo-random number generators 12 in the transmitting part and 20 in the receiving part are identical and are designed to generate pseudo-random numbers l = 1, 2, ..., L in binary code, where the maximum pseudo-random number L depends on the allocated frequency resource Δf and is determined in decimal code by the following expression:

(where n≥2 is the number of control outputs of the generator, pseudo-random numbers; ΔF _c = 4B is the effective spectrum width of the four-coded radio signal;

is a smaller integer). They can be implemented, as described in the book by W. Tice, K. Schenk “Semiconductor circuitry” (M .: Mir, 1982, p. 356-359, Fig. 20.20).

The receiving antenna 13 is designed to convert the energy of freely propagating electromagnetic waves into the energy of high-frequency currents. As the receiving antenna, any receiving antenna that is included with the R-161A2M radio station can be used.

The demodulator 14 is designed to eliminate pseudo-random tuning of the operating frequency within the allocated frequency resource. It can be implemented, as described in the book by N.L. Teplov, E.N. Kudelin, O.P. Lezhniuk "Non-linear radio engineering devices. Part 1 ”(Moscow: Military Publishing House, 1982, p.130-137, Fig.4.29).

The signal selector 15 is designed for selection of a four-coded radio signal. Its scheme is known and described in RF patent No. 2240653, IPC ⁷ Н04В 7/12, decl. 04/21/03, publ. November 20, 04 or in the patent of the Russian Federation No. 2188516, IPC ⁷ H04L 27/26, decl. 05.21.01, publ. 08/27/02.

The block for extracting additional sequences 16 is intended for extracting the first additional sequence from the odd elements of the quaternary-encoded sequence (extracting the elements α, β) and extracting the second additional sequence from the even elements of the quadruply-encoded sequence (extracting the elements γ, δ). Its scheme is known and described in RF patent No. 2240653, IPC ⁷ Н04В 7/12, decl. 04/21/03, publ. November 20, 04 or in the patent of the Russian Federation No. 2188516, IPC ⁷ H04L 27/26, decl. 05.21.01, publ. 08/27/02.

The first and second channels for processing the quaternary-encoded signals 17.1-17.2, the diagram of which is presented in Fig. 1, are intended for processing the quaternary-encoded information signals. They respectively consist of a two-channel matched filter 17.1.1 (17.2.1), a subtractor 17.1.2 (17.2.2) and a receiver of information 17.1.3 (17.2.3). In this case, the first and second information inputs of the channel for processing the quad-coded signals 17.1 (17.2) are respectively the first and second information inputs of a two-channel matched filter 17.1.1 (17.2.1), the first and second information outputs of which are respectively connected to the first and second information inputs Subtractor 17.1.2 (17.2.2). The output of the subtractor 17.1.2 (17.2.2) is connected to the input of the information receiver 17.1.3 (17.2.3), the N information outputs of which are N information outputs of the channel for processing the quad-coded signals 17.1 (17.2).

Two-channel matched filters 17.1.1-17.2.1 are intended for convolution of the first and second additional sequences up to the duration of one element of a four-coded sequence. In this case, two-channel matched filters are tuned to orthogonal quaternary-coded sequences. Their scheme is known and described in A.S. No. 1721837 USSR, IPC ⁶ H04L 27/26, declared 01/08/90, publ. 03/23/92.

Subtractors 17.1.2-17.2.2 are designed to subtract the pulses of the convolutional second additional sequence from the pulses of the convolutional first additional sequence arriving at its first input and form the convolutional four-coded information sequence. They can be implemented, as described in the book by W. Tice, K. Schenk “Semiconductor circuitry” (M .: Mir, 1982, p.137-138, Fig. 11.2).

Information receivers 17.1.3-17.2.3 are intended for dividing a collapsed quaternary-coded information sequence (a group signal with a temporary seal, consisting of N information sequences) into separate N information sequences. In this case, the first information receiver 17.1.3 splits the convolutional quaternary-encoded information sequence, consisting of odd information pulses from N transmitting parts of the subscriber stations, into N information channels, and the second information receiver 17.2.3 splits the convolutional quaternary-encoded information sequence, consisting of even information pulses from N transmitting parts of subscriber stations to N information channels. They can be implemented, as described in the book by M.V. Gitlits, A.V. Lev, “Theoretical Foundations of Multichannel Communication” (M .: Radio and Communication, 1985, p. 156-159, Fig. 7.9).

The combining device 18 is intended to form N information channels by combining N information channels consisting of odd information pulses with the corresponding N information channels consisting of even information pulses. They can be implemented, for example, on N logical elements 2OR, as described in the book by G.R. Avanesyan, V.P. Levshin "Integrated circuits TTL, TTLSH: Reference book" (M .: Mashinostroenie, 1993, p. 87).

The data transmission system with multiple access and time division multiplexing, presented in figure 1, operates as follows.

.When you turn on in the j-th transmitting part of the subscriber station, the clock generator 1 with a frequency f _tg = B generates a sequence of clock pulses with a duty cycle equal to two. Each element of this sequence with a high level of "1" will be considered odd, and with a low level of "0" - even. As an example, the diagrams of FIG. 3a show the implementation of a sequence of clock pulses generated in a clock pulse generator 1 of the 1st transmitting part of a subscriber station. In the remaining transmitting parts of the subscriber stations, the formation of a sequence of clock pulses in the clock generator 1 will be delayed by

.

Тогда при передаче двоичной информации на выходе источника информации 3 каждой j-й передающей части абонентской станции два информационных 1 N импульса длительностью

будут появляться за цикл

работы системы передачи с множественным доступом и временным разделением каналов в строго определенном по времени месте. В качестве примера на фиг.3б, ..., и представлены эпюры последовательности информационных импульсов от N=8 передающих частей абонентских станций соответственно (где цифрами 1, 2, 3, 4 и т.д. показаны порядковые номера информационных импульсов).Prior to the beginning of data transmission in a data transmission system with multiple access and time division of channels, clock generators 1 of all N transmitting parts of subscriber stations are synchronized by clocks, and time clocks 2 of all N transmitting parts of subscriber stations are synchronized by clocks so that they give enable pulses to clock inputs information sources 3 in the time intervals specified for a particular j-th transmitting part of the subscriber station. In this case, the enabling pulses from the chroniser 2 are fed to the input of the information source 3 with a period

Then, when transmitting binary information at the output of the information source 3 of each j-th transmitting part of the subscriber station, two information 1 N pulses of duration

will appear per cycle

operation of a transmission system with multiple access and time division of channels in a strictly defined time place. As an example, Fig.3b, ..., and presents the diagrams of the sequence of information pulses from N = 8 transmitting parts of subscriber stations, respectively (where the numbers 1, 2, 3, 4, etc. show the serial numbers of information pulses).

. Эпюры удлиненных информационных сигналов от N=8 передающих абонентских частей станций представлены на фиг.3й, ..., р соответственно.Information pulses of duration τ from the output of the information source 3 (Fig.3b, ..., and) are fed to the information input of the driver of the information signal 4, and to its control input from the synchronizer 2 with a period T _{and the} clock pulses arrive. In this case, the clock input of the driver of the information signal 4 from the output of the clock generator 1 receives a sequence of clock pulses with a frequency f _tg (figa). At the output of the driver of the information signal 4, an elongated information signal is formed with a pulse duration equal to

. Plots of elongated information signals from N = 8 transmitting subscriber parts of the stations are shown in FIGS. 3, ..., p, respectively.

, a при поступлении информационного импульса, соответствующего логическому "0", с выхода источника информации 3 на информационный вход формирователя информационного сигнала 4 на его выходе будет формироваться информационный удлиненный сигнал, соответствующий логическому "0", с длительностью импульса, равной

.Thus, when an information impulse corresponding to a logical "1" arrives from the output of the information source 3 to the information input of the information signal generator 4, an elongated information signal will be generated at its output, corresponding to the logical "1", with a pulse duration equal to

, a upon receipt of an information impulse corresponding to a logical "0" from the output of the information source 3 to the information input of the driver of the information signal 4, an elongated information signal corresponding to the logical "0" with a pulse duration equal to

.

(фиг.3й, ..., р) с выхода формирователя информационного сигнала 4 поступает на информационный вход блока формирования субпотоков 5.Formed extended information signal duration

(FIG. 3rd, ..., p) from the output of the shaper of the information signal 4 is fed to the information input of the sub-stream generating unit 5.

(фиг.3й, ..., р) поступает на информационный вход первого электронного ключа 5.3, а последовательность тактовых импульсов с выхода генератора тактовых импульсов 1 с частотой f_тг (фиг.3а) одновременно поступает на вход счетчика тактовых импульсов 5.1 и на информационный вход второго электронного ключа 5.4. При этом на k-х счетных выходах счетчика тактовых импульсов 5.1 формируется двоичный параллельный код его текущего состояния, который поступает на k-ые информационные входы дешифратора 5.2. На

управляющих выходах дешифратора 5.2 формируются разрешающие импульсы, которые одновременно поступают на соответствующие первые или вторые управляющие входы первого 5.3 и второго 5.4 электронных ключей. Эпюры сформированных разрешающих N импульсов с

управляющих выходах дешифратора 5.2 1-й передающей части абонентской станции представлены на фиг.4а, б соответственно. При поступлении на первые управляющие входы первого 5.3 и второго 5.4 электронных ключей разрешающего импульса (фиг.4а) на первый информационный выход первого электронного ключа 5.3 проключается нечетный удлиненный информационный сигнал длительностью

(фиг.3й, ..., р), который подается на информационный вход первого D-триггера 5.5, а на первый информационный выход второго электронного ключа 5.4 проключается тактовый импульс длительность τ (фиг.3а), который подается на тактовый вход первого D-триггера 5.5, по переднему фронту которого первый D-триггер 5.5 устанавливается в состояние, соответствующее уровню нечетного удлиненного информационного сигнала (фиг.3й, ..., р), поданного на его информационный вход. При поступлении на вторые управляющие входы первого 5.3 и второго 5.4 электронных ключей разрешающего импульса (фиг.4б) на второй информационный выход первого электронного ключа 5.3 проключается четный удлиненный информационный сигнал длительностью

(фиг.3й, ..., р), который подается на информационный вход второго D-триггера 5.6, а на второй информационный выход второго электронного ключа 5.4 проключается тактовый импульс длительность τ (фиг.3а), который подается на тактовый вход второго D-триггера 5.6, по переднему фронту которого второй D-триггер 5.6 устанавливается в состояние, соответствующее уровню четного удлиненного информационного сигнала (фиг.3й, ..., р), поданного на его информационный вход. Таким образом, на выходе первого D-триггера 5.5 формируется первый информационный субпоток, состоящий из нечетных информационных сигналов, а на выходе второго D-триггера 5.6 формируется второй информационный субпоток, состоящий из четных информационных сигналов. При этом длительность каждого информационного сигнала первого и второго информационных субпотоков удлиняется в два раза и становится равной τN. Эпюры сформированных первого и второго информационных субпотоков от N=8 передающих частей абонентских станций представлены на фиг.4в, д, ж, и, к, м, о, р и фиг.4г, е, з, й, л, н, п, с соответственно.The sub-stream generation unit 5 shown in FIG. 2 operates as follows. Long information signal duration

(fig.3y, ..., p) enters the information input of the first electronic key 5.3, and the sequence of clock pulses from the output of the clock generator 1 with a frequency f _tg (fig.3a) simultaneously enters the input of the clock counter 5.1 and the information input of the second electronic key 5.4. At the same time, a binary parallel code of its current state is generated at the kth counted outputs of the clock counter 5.1, which arrives at the kth information inputs of the decoder 5.2. On

The control outputs of the decoder 5.2 enable pulses are generated, which simultaneously arrive at the corresponding first or second control inputs of the first 5.3 and second 5.4 electronic keys. Plots of the formed resolving N pulses with

the control outputs of the decoder 5.2 of the 1st transmitting part of the subscriber station are presented in figa, b, respectively. Upon receipt of the first control inputs of the first 5.3 and second 5.4 electronic keys of the enable pulse (Fig. 4a), the odd elongated information signal of duration lasts for the first information output of the first electronic key 5.3

(fig.3y, ..., p), which is fed to the information input of the first D-trigger 5.5, and a clock pulse of duration τ is switched on to the first information output of the second electronic key 5.4 (figa), which is fed to the clock input of the first D -trigger 5.5, on the leading edge of which the first D-trigger 5.5 is set to a state corresponding to the level of an odd elongated information signal (Fig. 3, ..., p) applied to its information input. Upon receipt of the second control inputs of the first 5.3 and second 5.4 electronic keys of the enable pulse (Fig.4b), the second information output of the first electronic key 5.3 switches on an even extended information signal of duration

(fig.3y, ..., p), which is fed to the information input of the second D-flip-flop 5.6, and a clock pulse of duration τ is switched on to the second information output of the second electronic key 5.4 (figa), which is fed to the clock input of the second D -trigger 5.6, on the leading edge of which the second D-trigger 5.6 is set to a state corresponding to the level of an even elongated information signal (Fig. 3, ..., p) applied to its information input. Thus, at the output of the first D-flip-flop 5.5, a first information substream is formed, consisting of odd information signals, and at the output of the second D-flip-flop 5.6, a second information substream is formed, consisting of even information signals. In this case, the duration of each information signal of the first and second information substreams is doubled and becomes equal to τN. The diagrams of the generated first and second information substreams from N = 8 transmitting parts of subscriber stations are shown in Figs. 4c, d, g, and, k, m, o, p and Fig. 4d, e, s, d, l, n, p , respectively.

Formed first (figv, d, g, and, k, m, o, p) and second (fig. 4d, e, s, d, l, n, n, s) information substreams arrive at the information inputs, respectively, of the first 6.1 and the second 6.2 channels of the formation of the four-coded signals. The clock inputs of the first 6.1 and second 6.2 channels of the formation of the quadruple-encoded signals from the output of the clock generator 1 receives a sequence of clock pulses with a frequency f _tg (Fig. 3 a).

The first information substream (Fig.4c, d, g, and, k, m, o, p) is fed to the information input of the encoder 6.1.1, and its clock input receives a sequence of clock pulses with a frequency f _tg from the output of the clock pulses 1 (figa). In the encoder 6.1.1 encoder, the formation and cyclic implementation of a quaternary-encoded sequence with a period of N = 2 ^k , for example, Velty codes or E-codes, is carried out. As an example, the diagrams of FIGS. 5a, c, d, g, and, k, m, o show the implementation in encoders of encoded signals 6.1.1 N of the transmitting parts of subscriber stations of the original quaternary-encoded sequence αγαδαγβγ (i = 1), with the number elements N = 8 (hereinafter, this quaternary-encoded sequence will be called the first).

Thus, at the output of the encoder 6.1.1 encoder, four-coded information signals of duration Nτ are generated. In this case, when a logical “1” arrives at the information input of the encoder 6.1.1 encoder, a non-invertible four-coded information signal is generated at its output, and when a logical “0” arrives at the information input of the encoder 6.1.1 encoder, an inverted quadruple is generated at its output -coded information signal.

From the output of the encoder signal generator 6.1.1, a quadruple-encoded information signal (Fig. 5a, c, d, g, and, k, m, b) is fed to the information input of the signal driver of double frequency manipulation 6.1.2, and to its clock input a sequence of clock pulses with a frequency f _tg (Fig. 3a) comes from the output of a clock pulse generator 1. In a signal generator of double frequency manipulation 6.1.2, a four-coded information signal of duration Nτ is converted into a four-coded radio signal. The diagrams of the quaternary-coded radio signals from N = 8 transmitting parts of subscriber stations are shown in Figs. 5p, t, f, c, w, b, b, w, respectively. Moreover, the elements of the quaternary-encoded radio signals α, β, γ and δ fulfill the condition of orthogonality in frequency.

The change in the high-frequency oscillation of the quadruple-encoded radio signal (Fig.5p, t, f, c, w, b, b, b), formed in the signal driver of double frequency manipulation 6.1.2, can be described as follows:

Table Quaternary Coded Elements Input No. 1 of block 6.1.2 (6.2.2) (from block No. 6.1.1 (6.2.1)) Input No. 2 of block 6.1.2 (6.2.2) (from block No. 1)) Quadruple Coded Radio Frequency δ 0 0 f ₁ γ 0 one f ₂ β one 0 f ₃ α one one f ₄

where f ₁ <f ₂ <f ₃ <f ₄ , or f ₁ > f ₂ > f ₃ > f ₄ is the frequency dependence of the frequency channels of the four-coded radio signal; Δf ₁ = | f ₁ -f ₂ |, Δf ₂ = | f ₂ -f ₃ |, Δf ₃ = | f ₃ -f ₄ | - the frequency shift between the frequency channels of the four-coded radio signal; Δf ₁ = xB, Δf ₂ = mB, Δf ₃ = zB; x = 1, 2, ... is an integer; m = 1, 2, ... is an integer; z = 1, 2, ... is an integer; x, m, z are the coefficients that control the change in the frequency shift between the frequency channels of the four-coded radio signal.

In the second channel for generating quaternary-encoded signals 6.2, the formation of quaternary-encoded signals is similar, except that in the encoder of signals 6.2.1, the formation and cyclic implementation of the quaternary-encoded sequence with a period of N = 2 ^k orthogonal to the quaternary-encoded sequence formed in the encoder 6.1.1 of the first channel for generating the quad-coded signals 6.1. As an example, the diagrams of FIGS. 5b, d, e, s, y, l, n, n show the implementation in encoders of encoded signals 6.2.1 of the N transmitting parts of subscriber stations of the original quaternary-encoded sequence, which is orthogonal to the first (i = 1) αγαδβδαδ (r = 5), with the number of elements N = 8 (hereinafter, this four-coded sequence will be called the second). Moreover, in the first and second quaternary-encoded sequences α = -β, γ = -δ, the elements α, β of the first and second quaternary-encoded sequences transmit the odd elements of the E-code, and the elements γ, δ of the first and second quaternary-encoded sequences - even elements of the E-code.

Thus, in the first 6.1 and second 6.2 channels for generating quaternary-encoded signals in encoders of encoded signals 6.1.1-6.2.1 of the transmitting parts of N subscriber stations, the formation and cyclic implementation of the corresponding quaternary-encoded sequences with a period of N = 2 ^k , satisfying the condition orthogonality in the code structure that do not have side outliers in the WKF in accordance with the expression

- время анализа ВКФ; i - номер четверично-кодированной в последовательности E_i(t) (E-кода), формируемой в первом канале формирования четверично-кодированных сигналов 6.1 N передающих частях абонентских станций, i=1, 2, ..., M; r - номер четверично-кодированной последовательности E_r(t) (E-кода), формируемой во втором канале формирования четверично-кодированных сигналов 6.2 N передающих частях абонентских станций, r=1, 2, ..., M; M - число четверично-кодированных последовательностей (Е-кодов) М=N.Where

- time analysis VKF; i is the number of the Quaternary encoded in the sequence E _i (t) (E-code) generated in the first channel for generating the Quaternary encoded signals 6.1 N transmitting parts of subscriber stations, i = 1, 2, ..., M; r is the number of the quaternary-encoded sequence E _r (t) (E-code) generated in the second channel for generating the quaternary-encoded signals 6.2 N transmitting parts of subscriber stations, r = 1, 2, ..., M; M is the number of quaternary-encoded sequences (E-codes) M = N.

For example, with N = 8, the total number of quaternary-encoded sequences (E-codes) is represented as a matrix:

The number i of the first quaternary-encoded sequence generated in the transmitting parts of N subscriber stations in the first channel for generating the quaternary-encoded signals 6.1 is associated with the number r of the second quaternary-encoded sequence formed in the transmitting parts of N of subscriber stations in the second channel for generating the quaternary-encoded signals 6.2 by the following relation:

The generated quaternary-encoded signals (FIG. 5p, t, f, c, w, b, b, w and FIG. 5c, y, x, h, w, w, s, e, i) in the first 6.1 and second 6.2 channels of formation Quaternary-encoded signals are respectively supplied to the first and second information inputs of the adder 7, where they are combined. At the output of the adder 7, a complex four-coded signal is generated. The time-frequency matrices of complex quaternary-coded radio signals from the output of adders 7 of the jth transmitting subscriber stations are shown in FIGS. 6a, ..., h, respectively (where the numbers and amplitude value of the element of the four-coded radio signal are shown with numbers (1, 2)) . From the output of the adder 7, a complex quaternary-coded radio signal (figa, ..., h) is fed to the information input of the modulator 8.

The clock input of the pseudorandom number generator 12 from the clock generator 1 receives a sequence of clock pulses with a frequency f _tg (figa). In the pseudo-random number generator 12, the sequence of clock pulses is converted into a pseudo-random sequence, which is fed to the n control outputs of the pseudo-random number generator 12 in binary code with a time shift of one clock cycle at each of its outputs. The pseudo-random number generator 12 has a capacity of L = 2 ⁿ -1 depending on the allocated frequency resource Δf. Pseudo-random number generators 12 of all transmitting parts of subscriber stations form the same pseudo-random sequence.

A pseudo-random sequence in binary code with n control outputs is supplied to the n control inputs of the frequency synthesizer 11, respectively. The clock synthesizer 11 receives a sequence of clock pulses with a frequency f _tg from the clock divider 1 (Fig. 3a). The frequency synthesizer 11 is formed by a pseudorandom _{frequency hopping} Δf harmonic oscillation frequency depending on the nominal value allocated frequency resource Δf.

The generated pseudo harmonic oscillation _{frequency hopping} denominated Δf is supplied to the modulating input of the modulator 8. Diagrams pseudo harmonic oscillation when L = 4 are shown in Figure 7a. At the output of modulator 8, for x = m = z = 1, Δf ₁ = Δf ₂ = Δf ₃ and f ₁ <f ₂ <f ₃ <f ₄ , four-coded radio signals with frequency hopping are generated within the allocated frequency resource Δf.

The four-coded radio signal from the output of the modulator 8 is fed to the input of the transmitter 9, in which the radio signal is amplified, and then fed to the input of the transmitting antenna 10. The transmitting antenna 10 converts the energy of high-frequency currents in the antenna-feeder path into the energy of freely propagating electromagnetic waves.

The time-frequency matrix of quaternary-coded radio signals with frequency hopping (group radio signal) from N = 8 transmitting parts of subscriber stations at L = 4 is shown in Fig.7b (where the numbers (1, 2, 3, 4, etc.) indicate the presence and the value of the amplitude of the element of the group signal).

The receiving antenna 13 of the receiving part of the central station receives a set of four-coded radio signals from all N transmitting parts of the subscriber stations (group radio signal figb). The receiving antenna 13 converts the energy of freely propagating electromagnetic waves into the energy of high-frequency currents. From the output of the receiving antenna 13, a set of four-coded radio signals from N transmitting parts of subscriber stations (Fig.7b) is fed to the input of the demodulator 14.

Clock generator 21, a pseudorandom number generator 20 and the frequency synthesizer 19 of the receiving part of the central work station and generating a pseudo harmonic oscillation _{frequency hopping} denominated Δf, similarly as in the transmitting parts of the subscriber stations. Therefore, at the output of the frequency synthesizer 19, a pseudo-random harmonic oscillation with a Δf frequency hopping frequency is generated _, similar to a pseudo-random harmonic oscillation generated in the transmitting parts of the subscriber stations (Fig. 7a). The generated pseudo-random harmonic oscillation is fed to the modulating input of the demodulator 14.

The demodulator 14 by the frequency synthesizer 19 controlled by a pseudorandom number generator 20, jumps a working frequency Δf _{frequency hopping} are removed, resulting in transferred to the initially selected frequency quaternary-coded radio signal (f _1, f _2, f ₃ and f _4).

From the output of the demodulator, the four-coded radio signal is fed to the input of the signal selector 15, which performs frequency selection of strictly defined high-frequency elements of the four-coded radio signal. At the first, second, third and fourth outputs of the signal selector 15, respectively, the first, second, third and fourth high-frequency radio signals are generated. Plots of the first, second, third and fourth high-frequency radio signals are presented in figa, ..., g, respectively.

The first, second, third and fourth high-frequency radio signals (Fig. 8a, ..., g) from the outputs of the signal selector 15, respectively, are supplied to the first, second, third and fourth inputs of the block for extracting additional sequences 16.

At the first and second information outputs of the block for extracting additional sequences 16, respectively, the first and second additional sequences are formed. In this case, the first additional sequence is formed from the odd elements of the quaternary-encoded sequence (allocation of elements α, β), and the second additional sequence of even elements of the quaternary-encoded sequence (selection of elements γ, δ). Plots of the first and second additional sequences are presented in fig.8d, e, respectively.

The first additional sequence (Fig.8d) simultaneously arrives at the first information inputs of the first 17.1 and second 17.2 channels of processing the quad-coded signals, and the second (Fig.8e) additional sequence simultaneously arrives at the second information inputs of the first 17.1 and the second 17.2 channels of processing four-way encoded signals.

The first additional sequence (Fig.8d) is supplied to the first information input of the two-channel matched filter 17.1.1, and the second additional sequence (Fig.8e) is fed to the second information input of the two-channel matched filter 17.1.1. In this case, the two-channel matched filter 17.1.1 of the first channel for processing the quaternary-encoded signals 17.1 is tuned to the first quaternary-encoded sequence αγαδαγβγ (i = 1).

In the two-channel matched filter 17.1.1, the first and second additional sequences (Figs. 8d, e) are collapsed to the duration of one element of the four-coded sequence. The diagrams of the folded first and second additional sequences are shown in Figs. 9a, b, respectively. The folded first and second additional sequences (figa, b) are received at the first and second information inputs of the subtractor 17.1.2, respectively.

The subtractor 17.1.2 subtracts the pulses of the second folded additional sequence (Fig.9b), which is supplied to the second information input of the subtractor 17.1.2 from the pulses of the first folded additional sequence (Fig. 9a), supplied to the first information input of the subtractor 17.1.2. At the output of the subtractor 17.1.2, an ACF of a pulsed form is formed from odd information pulses from N transmitting parts of subscriber stations with an amplitude N = 2 ^k times the amplitude of the element of the four-coded sequence. Plots of convoluted odd information pulses from N transmitting parts of subscriber stations are shown in Fig. 9c.

The folded odd information symbols (Fig. 9c) from N transmitting parts of subscriber stations from the output of the subtractor 17.1.2 go to the inputs of the information receivers 17.1.3, where the time division of the folded odd information pulses (Fig. 9c) comes along N information channels. Thus, at the N information outputs of the information receiver 17.1.3, N information sequences are formed from odd information pulses from N transmitting parts of subscriber stations. Plots of the odd elements of the information sequence from N transmitting parts of subscriber stations, divided by time into N information channels, are presented in FIG. 9d, ..., k, respectively.

In the second channel for processing the quaternary-encoded signals 17.2, the processing of the quaternary-encoded signals is similar, except that the two-channel matched filter 17.2.1 is tuned to the second quaternary-encoded sequence αγαδβδαδ (r = 5). The diagrams of the folded first and second additional sequences are shown in FIGS. 10a, b, respectively. At the output of the subtractor 17.2.1, even information pulses are generated from N transmitting parts of subscriber stations with an amplitude N = 2 ^k times the amplitude of the element of the four-coded sequence. Plots of folded even information pulses from N transmitting parts of subscriber stations are presented in FIG. Thus, N information sequences from even information pulses from N transmitting parts of subscriber stations are also generated at the N information outputs of the information receiver 17.2.3. Plots of even information pulses from N transmitting parts of subscriber stations, divided by time into N information channels, are presented in Fig. 10g, ..., k, respectively.

As a result, in the first 17.1 and second 17.2 channels of the processing of the quaternary-encoded signals, respectively, a simultaneous, independent convolution of the orthogonal quaternary-encoded sequences (Velty codes or E-codes) is performed, characterized in that they do not have side outliers in the aperiodic ACF and VKF, which accordingly, odd and even information pulses from N transmitting parts of subscriber stations were encoded (Fig.3b, ..., i), as well as the formation of N information channels from odd (Fig.9d, ..., k) and even (f g.10g, ..., k) data pulses.

From the N information outputs of the first channel for processing the quaternary-encoded signals 17.1, the odd information pulses (Figs. processing of quaternary-encoded signals 17.2 even information pulses (Fig.10g, ..., k) are supplied to the corresponding information inputs N + 1 through 2N of the combining device 18. In the combining device 18, the odd information pulses from the 1st input (figg) and even inform nation pulses from the N + 1st input (Fig.10g) are combined into a common information pulse stream, which is fed to the 1st output of combiner 18. The rest are odd (Fig.9d, ..., k) and even (Fig.10d) , ..., k) information flows from the corresponding outputs of the first 17.1 and second 17.2 channels of processing the quad-coded signals are fed to the corresponding inputs of the combining device 18 and are combined in a similar way. Thus, at the output of combiner 18, N information channels from N transmitting parts of subscriber stations are formed. The plots of the combined odd and even information pulses from N transmitting parts of subscriber stations, divided by time into N information channels, are presented in FIGS. 11a, ..., h, respectively. Moreover, with respect to the transmitted information pulses (fig.3b, ..., and), the received information pulses from N transmitting parts of subscriber stations at the information outputs of the receiving part of the central station are respectively delayed by time (T _c -τ).

и т.д. передающих частей абонентских станций) и при одинаковой величине ППРЧ Δf_ППРЧ, а между собой в группе они сдвинуты на время, кратное τ. Следовательно, N передающих частей абонентских станций попарно начинают излучать в строго определенном временном интервале в цикле Т_ц работы системы. На центральной приемной станции используется одно и то же оборудование для обработки группового сигнала, так как радиосигналы от всех N передающих частей абонентских станций одинаковы по форме и имеют одинаковую величину ППРЧ Δf_ППРЧ. После устранения ППРЧ и формирования первой и второй дополнительных последовательностей осуществляется одновременная, независимая корреляционная свертка сложного сигнала и восстановление нечетных и четных информационных импульсов от N передающих частей абонентских станций. Компенсация взаимных помех осуществляется за счет применения разнесенного приема по кодовой структуре, реализованного на условии выполнения ортогональности между двумя четверично-кодированными последовательностями (Е-кодами), которые не имеют боковых выбросов в апериодической АКФ и ВКФ. В приемниках информации нечетные и четные информационные импульсы разделяются по времени на N информационных каналов. В устройстве объединения происходит объединение нечетных и четных информационных импульсов и формирование N информационных каналов от N передающих частей абонентских станций. При этом принятая последовательность информационных импульсов от N передающих частей абонентских станций приобретают вид, как в системе передачи с множественным доступом и временным разделением каналов (прототипе), и также задерживается на время (Т_ц-τ).In the claimed data transmission system with multiple access and time division of channels, it is proposed that the odd and even information pulses from N transmitting parts of subscriber stations be transmitted with the corresponding orthogonal quaternary-encoded sequences (E-codes). In this case, information pulses of duration τ from the output of the information source of the jth transmitting part of the subscriber station will appear through T _and . Thus, the transmission of complex signals (four-coded radio signals) is carried out in pairs

etc. transmitting parts of subscriber stations) and with the same frequency hopping Δf _{frequency hopping} , and among themselves in the group they are shifted by a time multiple of τ. Therefore, N transmitting parts of subscriber stations begin to emit in pairs in a strictly defined time interval in the cycle T _c of the system. At the central receiving station, the same equipment is used for processing a group signal, since the radio signals from all N transmitting parts of subscriber stations are identical in shape and have the same frequency hopping Δf _{frequency hopping} . After eliminating the frequency hopping frequency and forming the first and second additional sequences, a simultaneous, independent correlation convolution of the complex signal and the restoration of the odd and even information pulses from the N transmitting parts of the subscriber stations are performed. Mutual interference is compensated for by the use of diversity reception in a code structure implemented on the condition that orthogonality is fulfilled between two quaternary-coded sequences (E-codes) that do not have side spikes in aperiodic ACF and VKF. In information receivers, the odd and even information pulses are time-divided into N information channels. In the combining device, the odd and even information pulses are combined and N information channels are formed from N transmitting parts of subscriber stations. Moreover, the adopted sequence of information pulses from N transmitting parts of subscriber stations takes the form, as in a transmission system with multiple access and time division of channels (prototype), and is also delayed by time (T _c -τ).

Thus, the proposed data access system with multiple access and time division of channels provides the possibility of expanding the scope due to the possibility of increasing the information transfer rate of the system or increasing reliability as a result of duplication of the transmission of information pulses due to the use of quaternary-coded sequences orthogonal in the code structure without extending the frequency resource and reducing system throughput, and is designed for system m data transmission with code compression of signals and data transmission systems with multiple access and time division of channels.

The above information indicates the following conditions are met when using the claimed device:

- a tool embodying the claimed device in its implementation, is intended for use in transmission systems and data collection with multiple access and time division channels;

- for the claimed device in the form described in the claims, the possibility of its implementation using the means and methods described in the application or known prior to the priority date is confirmed;

- a tool embodying the claimed invention in its implementation, is able to ensure the achievement of the perceived by the applicant technical result.

Thus, the claimed invention meets the criterion of "industrial applicability".

Claims (4)

1. The data transmission system with multiple access and time division of channels contains N = 2 ^k (where k≥2 is an integer; j = 1, 2, ..., N is the number of the transmitting part of the subscriber station) of the transmitting parts of the subscriber stations and the receiving part of the central station, with each transmitting part of the subscriber station containing a clock pulse generator, the output of which is jointly connected to the clock inputs of the driver of the information signal, the first channel for the formation of the four-coded signals, a frequency synthesizer, a pseudorandom generator numbers and chronizer, the output of which is jointly connected to the control input of the information signal generator and to the clock input of the information source, the output of which is connected to the information input of the information signal generator, the modulator whose output is connected to the input of the transmitter, the output of the transmitter is connected to the input of the transmitting antenna, n control outputs of the pseudo-random number generator, where n≥2, are connected to the corresponding n control inputs of the frequency synthesizer, the output of which is connected to the modulating the modulator input, and the receiving part of the central station contains a receiving antenna, the output of which is connected to the information input of the demodulator, the output of the demodulator is connected to the input of the signal selector, the first, second, third and fourth information outputs of which are connected to the first, second, third and fourth information inputs, respectively block allocation of additional sequences, the first and second information outputs of the block allocation of additional sequences are connected respectively to the first and to the second information inputs of the first channel for processing the quad-coded signals, the output of the clock generator is jointly connected to the clock inputs of the frequency synthesizer and pseudo-random number generator, n control outputs of which are connected to the corresponding n control inputs of the frequency synthesizer, the output of the frequency synthesizer is connected to the modulating input of the demodulator, characterized in that in each transmitting part of the subscriber station, an additional sub-stream generating unit identical to the first W a swarm channel for generating quaternary-coded signals and an adder, while the output of the driver of the information signal is connected to the information input of the block for generating substreams, the first and second information outputs of which are respectively connected to the information inputs of the first and second channels for generating quaternary-coded signals, the output of the clock generator jointly connected to the clock inputs of the sub-stream generating unit and the second channel for generating the quad-coded signals, in the passages of the first and second channels for generating the quadruple-encoded signals are respectively connected to the first and second information inputs of the adder, the output of which is connected to the information input of the modulator, and the second channel for processing the quadrature-encoded signals and a combiner identical to the first are additionally introduced into the receiver this, the first and second information outputs of the block for allocating additional sequences are also connected respectively to the first and second inf the input inputs of the second channel for processing the quadruple-encoded signals, N information outputs of which are connected to the corresponding from the N + 1 through 2N information inputs of the combiner, and the N information outputs of the first channel for processing the quadruple-encoded signals are connected to the corresponding from the 1st on the N-th information inputs of the combining device, N information outputs of the combining device are N information outputs of the receiving part of the central station. 2. The transmission system according to claim 1, characterized in that the sub-stream generation unit consists of a clock pulse counter, a decoder, first and second electronic keys, first and second D-flip-flops, while the input of the clock pulse counter and the information input of the second electronic key are connected together they are the clock input of the sub-stream generation unit, k counting outputs of the clock counter, where k≥2 are connected to k information inputs of the decoder, the first output of the decoder is jointly connected to the first control moves of the first and second electronic keys,

the decoder output, where N = 2 ^k , is jointly connected to the second control inputs of the first and second electronic keys, the information input of the first electronic key is the information input of the sub-stream generation unit, the first and second information outputs of the first electronic key are respectively connected to the information inputs of the first and second D -triggers, and the first and second information outputs of the second electronic key are respectively connected to the clock inputs of the first and second D-triggers, the outputs of the first and second D -triggers, respectively, are the first and second information outputs of the sub-stream generation unit. 3. The transmission system according to claim 1, characterized in that each channel for generating a quaternary-encoded signal of a transmitting part of a subscriber station consists of a encoder of signals and a signal shaper of twofold frequency manipulation, while the information input of the channel of generating four-encoded signals is an information input of the shaper encoded signals, the output of which is connected to the information input of the signal conditioner of double frequency manipulation, the output of the signal conditioner The twofold frequency-shift keying is the output of the channel for generating the quadruple-encoded signals, the clock inputs of the encoder signal shaper and the twofold frequency shaper signal generator are combined and are the clock input of the quad-coded signal generation channel. 4. The transmission system according to any one of claims 1 to 3, characterized in that each channel for processing the four-coded signals of the receiving part of the central station consists of a two-channel matched filter, a subtractor and a receiver of information, while the first and second information inputs of the processing channel are encoded signals are respectively the first and second information inputs of a two-channel matched filter, the first and second information outputs of which are respectively connected to the first and second inform to the subtractor inputs, the subtractor output is connected to the input of the information receiver, the N information outputs of which (where N = 2 ^k ; k≥2) are N information outputs of the channel for processing the quad-coded signals.

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