RU2635552C1 - Method of information transmission in communication system with noise signals - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: on the transmitting side, the flow of transmitted data is shared into blocks containing l bits and k extra bits; predetermined pseudo-random sequence (PRS) is formed with the cyclic time shift (CTS), defined by the combination of l bits of the corresponding transmitted block in accordance with the selected encoding method; code modulation (CM) is implemented on the results of forming PRS with CTS, defined by the combination of k additional bits of corresponding transmitted block in accordance with the selected encoding method; the sequence of NSS is formed by phase-shift keying of high frequency tone signal, and key function, when trasmitting the block, is the result of CM implementation; generated sequence of NSS is transmitted, and input data for operation of splitting the flow of data to be transferred is the input sequences of this data, and the step of forming PRS with CTS is performed on the result of operation of splitting the flow of data to be transferred, received signals are converted into electrical on the receiving side; correlation maximum of received signal with NSS, formed by phase-shift keying according to the law of preset PRS with zero CTS, with each q_k(with q_k=1 …Q, and Q=2^k) alternative to CM, is defined; combination of k additional bits of given received data block is determined, based on results of correlation maximum of received signal with NSS determination at each q_k-th alternative to CM; the amount of CTS with respect to the alternative CM is determined, to which the specified combination of the k additional bits corresponds; the combination of l bits of a received block is determined on the basis of said result of the CTS determination; a set of k+l bits of a received block is formed on said results of its l bits and k extra bits determination. In the information transmission method, coding (and corresponding decoding) of k bits of each block of transmitted data is implemented by inserting CM into each result of PRS formation with CTS, while CM implementation does not result in an increase in the duration of each transmitted data.

EFFECT: increasing the speed of digital information transmission.

2 cl, 3 dwg

Description

The invention relates to the field of transmission of digital information and is intended for use in transceivers of communication systems.

In telecommunication tasks, in some cases, it is preferable to transmit digital information using noise-like signals (SHPS) (see [1], p. 3); as a rule, tonal signals are used as such signals, the phase manipulation of which is carried out by m-sequences (see [1], section 3.3. p. 49).

The alphabet of transmitted messages, as a rule, contains N _c >> 1 characters. When encoding each transmitted symbol with the corresponding m-sequence, the receiver of the communication system contains N _c correlators in each spatial and Doppler reception channels. Moreover, the implementation of the decoder requires significant computational resources, i.e. it is relatively complex. In this regard, in [2], a variant of the encoding method was proposed, which provides for the operation of generating a single m-sequence, converting a transmitted symbol (for example, C _υ ) into a cyclic time shift (CVC) by υ quanta, each of which is equal to the correlation interval of the m-sequence , and the introduction of the indicated CVC into this m-sequence. The decoding device with this encoding method, in addition to [2], is described, for example, in [3]. The advantage of this encoding method is the presence of only one m-sequence, potentially providing the ability to transmit each of all N _c characters in the alphabet; wherein the decoder in each spatial and Doppler reception channels contains only one correlator; the implementation of such a decoder is relatively simple.

Due to the fact that the sequences (according to the laws of which the phases of tonal signals are manipulated) can be used in classical (or standard) pseudorandom sequences (PSP) of a wide class, then the term "PSP" appears instead of the term "m-sequence".

The disadvantage of this analogue is as follows. In order for one PSP to provide the possibility of transmitting each of all N _c characters of the alphabet, it is necessary that its period N _m be equal to (or exceed) N _c . The period of any classical PSP is directly proportional to its duration, i.e. the product T _c = N _m ⋅τ, where N _m is the number of pulses making up the SRP (terminology according to [1], Section 3.3), τ is the duration of each of these pulses, and τ≥ΔF ^-1 , where ΔF is the width of the working frequency band communication systems. However, the data transfer rate is inversely proportional to the specified product. The number of bits per one transmitted symbol is log ₂ N _c , and the transmission time of one symbol is inversely proportional to the value of N _c . As a result, as the parameter N _m = N _c increases, the transmission rate provided by the analog decreases as (log ₂ N _c ) / N _c . So, for example, when switching from N _c = 8 to N _c = 32 in the indicated analogue, we have a decrease in the transmission rate by 2.4 times (i.e. (3: 8) / (5:32) = 2.4).

The closest in technical essence to the claimed object is a method of transmitting information in communication systems with ShPS according to the patent of the Russian Federation No. 2562769 [4] (prototype). The prototype includes the following operations:

on the transmitting side

бит и по k дополнительных бит;- separation of the stream of transmitted data into blocks containing

bit and k additional bits;

бит соответствующего передаваемого блока в соответствии с выбранным методом кодирования;- the formation of a predetermined memory bandwidth with a DAC defined by a combination of

a bit of the corresponding transmitted block in accordance with the selected encoding method;

- the implementation of phase manipulation of a high-frequency tone signal according to the law of each specified SRP with a DAC;

- the implementation of code modulation (CM) over the results of the specified phase shift keying, determined by a combination of k additional bits of the corresponding transmitted block in accordance with the selected coding method with the formation of a sequence of BPS as a result;

- transmission of the generated sequence of SHPS,

moreover, the input sequences of the data to be transmitted are the input sequences of the data to be divided, and the operation of forming the SRP with the DAC is performed on the results of the operation of the separation of the stream of transmitted data,

on the receiving side

- conversion of received signals into electrical ones;

- determination of the maximum correlation of the received signal with the BPS formed by phase modulation according to the law of a predetermined bandwidth with zero DAC, for each q _k- th (with q _k = 1 ... Q, with Q = 2 ^k ) alternative to CM;

- determination of the combination of k additional bits of the received data block based on the results of determining the maximum correlation of the received signal with the BPS for each q _kth alternative to the CM;

- determination of the DAC value in relation to the alternative CM, which corresponds to the specified combination of k additional bits;

бит принятого блока на основании указанного результата определения ЦВС;- definition combination

the bit of the received block based on the specified result of the DAC;

бит принятого блока по указанным результатам определения его

бит и k дополнительных бит.- aggregate formation

bit of the received block according to the specified results of determining it

bit and k extra bits.

The principle of operation of the prototype (the achievement of a technical effect in it) is mainly based on the fact that the addition of the CM operation to traditional coding by introducing a DAC in the memory bandwidth can significantly increase the transmission speed.

The main disadvantage of the prototype is as follows. In it, the CM operation is performed on a high-frequency signal (i.e., on the results of phase manipulation of a high-frequency tone signal) and provides for the implementation of cyclic spectrum shift (DSS). At the same time, in the process of implementation of the CM, the formation of the corresponding temporary realizations of the SHPS (in which the indicated DSS takes place), the duration of which is τ _DSS exceeds the duration of the initial _DSS T _s , into which before the operation of the CM the DDS was entered. The specified increase in duration entails either a temporary overlap of the NWPs that are transmitted at adjacent time points (transmission system clock cycles), i.e. intersymbol interference, or reduction in transmission speed. The first situation occurs when the period of transmitted SPS is equal to the duration of the indicated SRP T _s (and the presence of intersymbol interference ultimately also leads to a decrease in the transmission rate), and the second _occurs when the period of succession of transmitted SPS is equal to τ _ccc > T _c .

In addition, an additional disadvantage of the prototype is the comparative complexity of performing QM operations and (mainly) the operation of determining the maximum correlation of the received signal with the BSS for each q-th QM alternative (see, in particular, the contents of operations 7.1 ... 1.Q in the description [ four]).

The aim of the proposed method is to eliminate these disadvantages of the prototype, i.e. mainly - increasing the speed of information transfer.

The goal is achieved by the fact that the method of transmitting information in a communication system with ShPS, provides for the following operations:

on the transmitting side

бит и по k дополнительных бит;- divide the stream of transmitted data into blocks containing

bit and k additional bits;

бит соответствующего передаваемого блока в соответствии с выбранным методом кодирования;- form a predetermined memory bandwidth with a DAC defined by a combination of

a bit of the corresponding transmitted block in accordance with the selected encoding method;

- implement code modulation (CM), determined by a combination of k additional bits of the corresponding transmitted block in accordance with the selected encoding method;

- form an ALS sequence by phase manipulation of a high-frequency tone signal;

- transmit the generated sequence of SHPS,

moreover, the input sequences of the data to be transmitted are the input sequences of the data to be divided, and the operation of forming the SRP with the DAC is performed on the results of the operation of the separation of the stream of transmitted data,

on the receiving side

- convert the received signals into electrical;

- determine the maximum correlation of the received signal with the SHPS formed by phase modulation according to the law of a predetermined bandwidth with zero CVS, for each q _k- th (with q _k = 1 ... Q, with Q = 2 ^k ) alternative to CM;

- determine the combination of k additional bits of the given given data block based on the results of determining the maximum correlation of the received signal with the BSS for each q _kth alternative to the CM;

- determine the value of the DAC in relation to the alternative CM, which corresponds to the specified combination of k additional bits;

бит принятого блока на основании указанного результата определения ЦВС;- determine the combination

the bit of the received block based on the specified result of the DAC;

бит принятого блока по указанным результатам определения его

бит и k дополнительных бит,- form an aggregate

bit of the received block according to the specified results of determining it

bit and k extra bits,

moreover, on the transmitting side

- KM operation is performed on the results of the formation of the SRP with the DAC;

- the phase-shift operation of the high-frequency tone signal is performed on the results of the KM operation.

A flowchart illustrating the combination of operations of the proposed transmission method is shown in FIG. 1, where are indicated:

- 1 - the operation of splitting the stream to be transmitted data;

- 2 - the operation of the formation of the SRP with DAC;

- 3 - KM operation;

- 4 - phase manipulation operation;

- 5 - transmission operation of the NPS;

- 6 - operation, the conversion of received signals into electrical;

- 7.1 ... 7.Q - operations to determine the maximum correlation of the received signal with the BPS with zero DAC with q _k- th (q _k = 1 ... Q) alternative to CM;

- 8 - the operation of determining the combination of k additional bits of the received data block;

- 9 - operation for determining the value of the CVS;

бит принятого блока данных;- 10 - combination determination operation

bit of the received data block;

бит принятого блока данных.- 11 - operation of forming a population

bit of the received data block.

All operations of the proposed method, which also appear in the prototype (i.e., operations 1, 2, 4 ... 6, 8 ... 11), can be implemented completely analogously to the corresponding operations of the prototype.

бит подлежащей передаче информации. При указанном запоминании этот блок записывается в оперативную память емкостью

бит (здесь и далее упоминаются компоненты цифровых аппаратно-программных средств, реализующих заявляемый способ). Из указанных

бит

бит передаются для выполнения операции формирования ПСП с ЦВЗ (т.е. операции 2), а остальные k бит (напомним, что они именуются дополнительными) - для выполнения операции КМ 3. (Управление чтением передаваемой информации осуществляется программными средствами). Далее запоминается следующий блок из

бит подлежащей передаче информации и указанные функции повторяются. Период однократной реализации совокупности указанных функций при выполнении операции 1, т.е. период их повторения равен длительности интервала времени Т_с, в течение которого передается один (

)-битовый блок данных (символ). Последнее относится и ко всем прочим операциям заявляемого способа, которые реализуются последовательно во времени с пренебрежимо малыми задержками, обусловленными конечным быстродействием выполняющих их цифровых аппаратных средств. Далее, если это не оговорено особо, приводится описание содержания операций 2 … 11 применительно к передаче и приему одного фрагмента потока (блока данных или символа). Над всеми фрагментами потока вся совокупность операций заявляемого способа выполняется последовательно во времени и одинаково.The operation of dividing the stream to be transmitted data 1 is implemented, for example, as follows. The fragment of the stream (data block or symbol) containing

bit to be transmitted information. With the indicated storage, this block is written into RAM with a capacity of

bit (hereinafter referred to as components of digital hardware and software that implement the inventive method). Of these

bit

bits are transmitted to perform the operation of forming the memory bandwidth with the CEH (i.e., operation 2), and the remaining k bits (recall that they are referred to as additional) are used to perform the operation KM 3. (The reading of the transmitted information is controlled by software). Next, the next block from

the bit of information to be transmitted and the specified functions are repeated. The period of a single implementation of the totality of these functions during operation 1, i.e. their repetition period is equal to the duration of the time interval T _s , during which one is transmitted (

) -bit data block (character). The latter applies to all other operations of the proposed method, which are implemented sequentially in time with negligible delays due to the finite speed of their digital hardware. Further, unless otherwise specified, a description of the contents of operations 2 ... 11 is given with respect to the transmission and reception of one stream fragment (data block or symbol). Above all fragments of the stream, the entire set of operations of the proposed method is performed sequentially in time and equally.

бит передаваемого блока (символа). Соответствие между вводимым ЦВС и указанной комбинацией из

бит может быть, например, следующим: выраженный в единицах, равных ΔF^-1 (где ΔF - ширина полосы частот ПСП) ЦВС есть двоичный код, представленный комбинацией из

дополнительных бит; так, при комбинации, например,

=6 бит вида 001010 (или в десятичной системе - 10) вводится ЦВС величиной 10ΔF^-1. Этот ЦВС может вводиться в ПСП непосредственно в момент ее чтения, при этом чтение начинается с ячейки памяти, номер которой равен указанному двоичному коду.The operation of forming a memory bandwidth with DAC 2 is implemented by, for example, reading from a memory a memory bandwidth previously recorded in it and introducing a DAC in it, the value of which corresponds to a combination of

bit of the transmitted block (character). The correspondence between the input DAC and the specified combination of

a bit can be, for example, the following: expressed in units equal to ΔF ^-1 (where ΔF is the bandwidth of the frequency bandwidth) DSP is a binary code represented by a combination of

extra bits; so, when combined, for example,

= 6 bits of the form 001010 (or 10 in the decimal system), a DAC of 10ΔF ^{-1 is} entered. This DAC can be entered into the memory card directly at the time of reading, while reading begins with a memory cell whose number is equal to the specified binary code.

The contents of the KM 3 operation in an embodiment performed by multiplying the SRP with the added DAC by the auxiliary SRP and then introducing the result of the specified multiplication of the additional DAC is illustrated by the block diagram shown in FIG. 2, where are indicated:

- 3.1 - a suboperation (i.e., an integral part of operation 3) of multiplying the SRP with the input of the DAC on the auxiliary SRP;

- 3.2 - suboperation of the introduction of additional CVS.

Suboperation 3.1. performed by multiplying the same time samples of the SRP with the input of the DAC, formed as a result of operation 2, and the auxiliary SRP. As the latter, one can use an SRP of an arbitrary type (in the general case, which does not coincide with the SRP into which the CVC is introduced during operation 2; for example, when the operation 2 is performed, the CVC is introduced into the Gold sequence of some length N _c , and when performing the substep 3.1 as an auxiliary SRP, any half of the m-sequence or Gold sequence of length 2N _c ). Execution of a suboperation 3.1. provides the possibility of introducing an additional DAC and (in conjunction with the sub-operation 7.q _k .2 described below) the fundamental possibility of separating (distinguishing) those introduced during operation 2 of the DAC and when performing the sub-operation 3.2. additional DAC. If sub-operation 3.1 was absent, the effect of introducing the two indicated DACs at the receiving end of the transmission system would be perceived simply as the sum of the indicated DACs, the terms of which could not be determined (in this case, it would be impossible to decode the transmitted data).

The introduction (when performing suboperation 3.2) of an additional DAC is carried out essentially the same as when performing operation 2, with the only difference being that an additional DAC is determined by a combination of k additional bits. So, with a combination of these k extra bits of the form 101, which corresponds to the decimal digit 7, the indicated DAC is 7ΔF ^-1 .

The phase manipulation operation 4 provides for the multiplication of a temporary implementation formed as a result of performing operation 3 (3.2.) By a carrier frequency tone. As a result of the operation 4, an SHPS (a sequence of SHPS) is formed.

The transfer operation of SHPS 5 is realized by converting digital ShSS generated as a result of operation 4 to analog ones using a digital-to-analog converter and converting analog electrical signals, for example (in the case of a sound-underwater or hydroacoustic communication system) into acoustic vibrations of an aqueous medium. In this case, a sonar emitter is used for the last conversion.

The operation of converting the received signals to electric 6 in the considered example of a sound supply system involves the conversion of acoustic vibrations of the aqueous medium into electrical signals. In this case, it is realized by a hydrophone or, in a more complicated case, an antenna array containing a set of hydrophones, a set of delay lines and an adder (see [5], Fig. 1.5b, 1.6 and 1.7). Moreover, between the output of each of the hydrophones and the input of the corresponding digital delay line, an analog-to-digital converter is turned on.

The content of each q _k- th operation (from the set of operations 7.1 ... 7.Q) of determining the maximum correlation of the received signal with the BPS with zero DAC for the q _k- th alternative to the CM is illustrated by the block diagram shown in FIG. 3, where are indicated:

- 7.q _k .1 - suboperation of the introduction of the reverse additional CVS;

- 7.g _k .2 - sub-operation of multiplication by auxiliary SRP;

- 7.q _k .3 - sub-operation for calculating the cyclic correlation function;

- 7.q _k .4 - suboperation of determining the maximum of the cyclic correlation function.

Here, the presence of index k at the alternative number KM q indicates that this alternative number is uniquely associated with a combination of k additional bits of the block.

The content of each operation 7.q _k . consists in the following. First, the DAC is introduced into the implementation of the received signal (this is a sub-operation 7.q _k .1), the inverse (i.e., having the opposite sign) with respect to that additional DAC that would be introduced on the transmitting side with q _k- th combination of k additional bit of the transmitted block (acting by analogy with operation 3, it is possible to determine the q _kth combination of k additional bits as a decimal number corresponding to the binary code of this combination of k additional bits). In the aggregate of all sub-operations 7.q _k .1 with q _k = 1 ... Q, there is actually compensation for an additional DAC calculated for each particular q _k for one of the possible alternatives to this DAC. Due to the fact that the total number of such alternatives is Q, when performing one of the indicated sub-operations, the specified compensation will actually take place, which is required for the final correct decoding of the next received data block (note that this condition is necessary for correct decoding, but insufficient).

The execution of the sub-operation 7.q _k .2 of multiplication by the auxiliary SRP provides compensation for the CM introduced in the operation 3 (sub-operations 3.1). The specified compensation takes place only when q _k , which really corresponds to k additional bits of the received block, which creates the conditions for correct decoding as a result of the implementation of the proposed method. Explanations of the latter effect are given in the description of the prototype (in the description of operations 7.1 ... 1.Q).

The sub-operations of calculating the cyclic correlation function 7.q _k .3 and determining the maximum of the cyclic correlation function 7.q _k .4 are performed in accordance with their names. So, the suboperation 7.q _k .3 is realized by calculating the cyclic correlation function between the input signal for it and the reference function, which coincides in form with the PNC with zero CVS or, equivalently, the cyclic convolution between the input signal and the specified reference function read in reverse time (i.e., if this function has the form S (t) for values of the time argument t in the range 0 ... N _m ⋅τ, then the same function, read in reverse time, has the form S (N _m ⋅τ- t)). The reference function used in the calculation of convolution, i.e. when performing suboperation 7.q _k .3 does not depend on the index q _k . The indicated sub-operation of calculating the CCF is performed classically, i.e. like a quick convolution [6].

Suboperations 7.q _k .4 is performed by finding the maximum of the cyclic correlation function calculated during the execution of suboperation 7.q _k .3 (we denote it by CCF _qk ). The indicated maximum (we denote it by A _qk ) and this CDF _{qk itself} are formed at the lower and upper outputs of the 7.q _k .4 block in FIG. 3, which are the respective outputs of each operation 7.q _k in FIG. 1, i.e. the array of time samples of the CCF _qk formed during the execution of sub-operation 7.q _k .3 is transmitted (broadcast) through a block that implements sub-operation 7.q _k .4 for its further operation 8.

The operation of determining the combination of k additional bits of the received data block 8 involves finding the value q _k = q _k0 at which the value A _{qk is} maximum. To do this, the inputs of the block performing operation 8 receive an array of values A _qk , formed as a result of the execution of a set of operations 7.1 ... 1.Q; these values, as noted above, are formed at the upper outputs of the blocks performing operations 7.1 ... 7.Q. Moreover, the set k of additional bits of the received symbol is determined, for example, as a binary code of the number q _k0 . This set of k additional bits are formed at the lower output of the block that implements operation 8; at the upper output of the indicated block, one of the CDF _qk received at its input is formed, which corresponds to the index q _k = q _k0 , i.e. CCF _gk0 .

The operation of determining the value of DAC 9 is carried _out by reading at the input of the block of time samples of the CCF _qk0 that implements it, which corresponds to the index at the maximum of the values of A _qk , and determining the time argument of the CCF n _qk0 at which the CCF _{qk0 is} maximum.

бит принятого блока данных 10 предусматривает, например, преобразование поступающей на вход реализующего ее блока величины n_qk0 в модифицированную величину ЦВС

по формуле

, где t_д - период частоты дискретизации ЦКФ, а квадратные скобки означают округление стоящего в них результата до целого. Далее в качестве совокупности

бит принятого блока данных фиксируется бинарный код величины

. Величина

(соответствующий ей бинарный код или, что то же самое, величина

, представленная в двоичной системе) и есть искомая комбинация из

бит принятого блока данных.Combination determination operation

the bit of the received data block 10 provides, for example, the conversion of the quantity n _qk0 arriving at the input of the block realizing it into a modified value of the _DAC

according to the formula

, where t _d - period of the sampling frequency CCF, and square brackets mean rounding the result in them to the nearest whole. Further as a set

the bit of the received data block is fixed binary value code

. Value

(the corresponding binary code or, equivalently, the quantity

represented in the binary system) is the desired combination of

bit of the received data block.

бит принятого блока данных 11 предусматривает формирование слова, первые

бит которого совпадают с

битами, сформированными в результате выполнения операции 10, а последующие k (дополнительных) бит - с k битами, сформированными в результате выполнения операции 8.Population operation

the bit of the received data block 11 provides for the formation of the word, the first

whose bit match

bits generated as a result of operation 10, and the subsequent k (additional) bits with k bits generated as a result of operation 8.

An equivalent embodiment of the proposed method is also possible, in which, when performing suboperation 7.q _k .4, both the maximum of the calculated CCF _qk and the time argument of the CCF _qk are found at which this maximum takes place. The indicated maximum A _qk and the corresponding argument n _qk0 (the latter in units equal to ΔF ^-1 ) are formed respectively at the lower and upper outputs of the block 7.q _k .4 in FIG. 3, which are the respective outputs of each operation 7.1 ... 1.Q in FIG. 1. In this case, the function of operation 8 is specified as finding not only the index q _k = q _k0 , but also the index n _qk0 . All these options for implementing the proposed method are equivalent to each other and, providing for the execution of the same operations, differ only in their layout in the flowchart.

The inventive object is designed for use in a synchronous communication system. In such a system, at the receiving end, the moments of the beginning of arrival of each information block (signal or symbol) are known. In principle, it is possible, for example, the option of the transmitter and receiver in a single time system. In this case, the synchronization of the operation of devices that implement signal processing operations at the receiving end is due to the fact that the propagation time of the signal from the transmitter to the receiver is known, and the equipment that implements the receiving operation includes a timer that generates a synchronization signal that controls the implementation of all receiving operations (except for operation 6 converting the received signals into electrical signals) at the time of the start of the arrival of the next fragment of the transmitted stream. Synchronization operations are not included in the structure of the claimed object, since the vast majority of digital (discrete) communication systems are synchronous, and the features of the claimed object are not associated with any specific features of the totality of these operations.

All operations of the claimed object, except operations 5 and partially (namely, with the exception of hydrophones) 6 are implemented by programmable digital signal processing.

бит. При этом (так же, как и в прототипе)

бит кодируются введением в используемую для передачи ПСП ЦВС, а k бит (называемых нами дополнительными) - искажением формы передаваемого ШПС посредством использования КМ, параметр которой определяется совокупностью этих k бит. Применение такого приема в принципе известно для обеспечения многоканальной связи в системах с CDMA (англ. Code Division Multiple Access - множественный доступ с кодовым разделением) [7], в которых реализуется технология связи, при которой каналы передачи имеют общую полосу частот, а многоканальная связь (т.е. совокупность контактов между несколькими парами абонентов) обеспечивается за счет введения при передаче-приеме для разных пар абонентов разной и для каждой пары фиксированной функции КМ. В прототипе использование КМ позволило существенно повысить скорость передачи данных; вместе с тем, как отмечено выше, прототип характеризуется рядом недостатков. В заявляемом объекте преимущества прототипа перед аналогами в скорости передачи сохранено и при этом упомянутые недостатки исключены. Технический эффект достигнут за счет того, что в заявляемом способе операция КМ реализуется непосредственно после операции введения ЦВС; это позволило реализовать операцию КМ 3, включающую, в частности, введение дополнительного ЦВС, определяемого k дополнительными битами. При такой реализации операции КМ 3 длительность формируемых впоследствии временных реализаций ШПС (здесь речь идет об операции 4, в итоге выполнения которой фактически формируются ШПС) с длительностью ПСП, формируемой при выполнении операции 2, совпадает. В прототипе же длительность ШПС указанную длительность ПСП превышала, что влекло за собой снижение скорости передачи. Заметим также, что операции 3 и 7.1 … 7.Q явно проще в сравнении с аналогичными операциями прототипа (в описании прототипа - это операции соответственно 4 и 7.1 … 7.0.About the principle of operation of the claimed object and the technical effect achieved in it. Each character transmitted in the claimed method, as in the prototype, contains

bit. At the same time (as in the prototype)

the bits are encoded by introducing into the DAC used for transmitting the SRP, and the k bits (called optional) by distorting the shape of the transmitted SHPS by using the CM, the parameter of which is determined by the combination of these k bits. The use of such a technique is basically known for providing multi-channel communication in systems with CDMA (Code Division Multiple Access - Code Multiple Access) [7], which implements communication technology in which transmission channels have a common frequency band and multi-channel communication (i.e., the set of contacts between several pairs of subscribers) is ensured by introducing a fixed KM function for different pairs of subscribers for different pairs of subscribers. In the prototype, the use of CM allowed to significantly increase the data transfer rate; however, as noted above, the prototype is characterized by a number of disadvantages. In the claimed object, the advantages of the prototype over analogues in the transmission speed is preserved and at the same time the above-mentioned disadvantages are excluded. The technical effect is achieved due to the fact that in the claimed method, the KM operation is realized immediately after the operation of the introduction of CVS; this allowed the implementation of the operation KM 3, including, in particular, the introduction of an additional DAC, determined by k additional bits. With such an implementation of operation KM 3, the duration of the subsequently generated temporary realizations of the NPS (here we are talking about operation 4, as a result of which the NPS are actually formed) with the duration of the SIR formed during the operation 2, coincides. In the prototype, however, the duration of the BPS indicated the duration of the bandwidth exceeded, which entailed a decrease in transmission speed. We also note that operations 3 and 7.1 ... 7.Q are clearly simpler in comparison with similar operations of the prototype (in the description of the prototype, these are operations 4 and 7.1 ... 7.0, respectively.

Introduction when transmitting a CM to the transmitted symbol, the parameters of which are uniquely associated with information about k bits, and implementation when receiving multi-channel processing, which includes, in particular, potentially compensating in each channel one of the possible combinations of the parameters of the specified CM, provides such compensation in fact only the channel in which this compensation is designed specifically for those CM parameters that match the k bits of the actually transmitted symbol. In this part, the inventive method is completely similar to the prototype.

Literature.

1. Varakin L.E. Communication systems with noise-like signals. M .: Radio and communication. 1985.338 s., Ill.

2. Nikolaev R.P., Popov A.R. A method of transmitting information in a communication system with noise-like signals. RF patent No. 2286017.

3. Krantz V.Z., Sechin V.V. Using information symbols to synchronize a communication system with complex signals // Hydroacoustics. Vol. No. 15, 2012. S. 36-41.

4. Golubev A.G. A method of transmitting information in a communication system with noise-like signals. RF patent No. 2562769.

5. Smaryshev M.D., Dobrovolsky Yu.Yu. Hydroacoustic antennas. Directory. L .: Shipbuilding. 1984.

6. Rabiner L., Gould B. Theory and application of digital signal processing. M .: World. 1978. 848 p., Ill.

7. CDMA - Wikipedia. https://ru.wikipedia.org/wiki/CDMA.

Claims (22)

1. The method of transmitting information in a communication system with noise-like signals (SHPS), which consists in the fact that on the transmitting side - divide the stream of transmitted data into blocks containing l bits and k additional bits; - form a predetermined pseudo-random sequence (PSP) with a cyclic time shift (DAC), determined by a combination of l bits of the corresponding transmitted block in accordance with the selected encoding method; - implement code modulation (CM), determined by a combination of k additional bits of the corresponding transmitted block in accordance with the selected encoding method; - form an ALS sequence by phase manipulation of a high-frequency tone signal; - transmit the generated sequence of SHPS, moreover, the input sequences of the data to be transmitted are the input sequences of the data to be divided, and the operation of forming the SRP with the DAC is performed on the results of the operation of the separation of the stream of transmitted data, on the receiving side - convert the received signals into electrical; - determine the maximum correlation of the received signal with the SHPS formed by phase modulation according to the law of a predetermined bandwidth with zero CVS, for each q _k- th (with q _k = 1 ... Q, with Q = 2 ^k ) alternative to CM; - determine the combination of k additional bits of the given given data block based on the results of determining the maximum correlation of the received signal with the BSS for each q _kth alternative to the CM; - determine the value of the DAC in relation to the alternative CM, which corresponds to the specified combination of k additional bits; - determine the combination of l bits of the received block based on the specified result of the DAC; - form a set of k + l bits of the received block according to the specified results of determining its l bits and k additional bits, characterized in that on the transmitting side - KM operation is performed on the results of the formation of the SRP with the DAC; - the phase-shift operation of the high-frequency tone signal is performed on the results of the KM operation. 2. The method of transmitting information in communication systems with ShPS according to claim 1, characterized in that on the transmitting side, the CM determined by a combination of k additional bits of the corresponding transmitted block is implemented by multiplying the specified generated memory bandwidth with the DAC by the auxiliary memory bandwidth and introducing into the result of the specified multiplication of the additional DAC determined by the specified combination of k additional bits; on the receiving side, the operation of determining the maximum correlation of the received signal with the BSS formed by phase modulation according to the law of a predetermined bandwidth with zero DACs is performed in Q processing channels, and in each q _kth of them it is performed by introducing an additional DAC in the received signal, reverse with respect to the additional CMC, which is introduced in the transmission when implementing CM corresponding to q _k k -th combination of additional bits, then the signal in each q _k -th processing channel is multiplied by the auxiliary cap, after Th calculated on the cyclic correlation function between the result of this multiplication to said NLS and is its maximum.

Images