RU2637422C1 - Method of receiving signals in digital communication system with compensation of noise defined by multiple-beam interference - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: method includes performing the following operations: by a test pulse, located in a fragment of message reception time interval known in the receiving end of the communication system, the ICR estimation operation is performed, each k-th time-based IN realisation, corresponding to each allowable k-th TSE alternative, is formed. This formation of IN realisations is performed taking into account the result of the ICR estimation, forming an array of differences {δ_k(t)}, between the analyzed TSE and each of the k-th of the indicated IN realisations separately, for each of these differences δ_k(t) they form the k-th decisive statistics (PC) z_k, and based on the totality of these PCs they make a decision about which particular TSE is adopted. Each kth PC z_k are formed by calculating the correlation between the k-th realisation of the δ_k(t) difference and the corresponding k-th TSE alternative, and the decision, about which particular TSE is adopted, is carried out by determining the index k =_k0 for that of the collection PC z_k0, which satisfies the condition z_k0=max_k{z_k}.

EFFECT: increase of noise immunity of reception of signals of digital communication during the operation of a communication system in the presence of multiple-beam interference.

3 dwg

Description

The invention relates to the field of transmission of digital information and is intended for use in decoders of communication systems operating in multipath conditions.

When communication systems operate at relatively large ranges, as a rule, there is multipath propagation, i.e. the effect of the arrival at the point of reception of a set of signal components or elementary packets (EPs) propagating along several beams with individual delays and amplitudes. In such situations, interference with reception occurs, caused, in particular, by temporary overlapping (interference) of EFs transmitted at adjacent (or, more generally, at relatively close) times. This effect is called intersymbol interference [1, 2]. Along with those indicated in the conditions under consideration, there are also interference with the reception due to the temporary overlap of components of the same EI that came in through different rays. This effect is called intrasymbol interference (AFI) [1, 3]. It is illustrated in [3, Fig. 21. The occurrence of intersymbol and intrasymbol interference]. The combination of these two effects will be called interference due to multipath propagation or multipath interference, and the interference generated by it will be called interference interference (IP).

With the duration of the EF (and the equal period of the EO following in the message), a much longer duration of the impulse response of the propagation channel (IRF), the prevailing (among the EI) is the interference generated by the AFR. When the duration of the KFM is much longer than the duration of the ES, the interference generated by the MSI prevails. In intermediate situations, the levels of these components of IP are comparable. The inventive method is devoted to the suppression of the components of the IP, due to the AFR.

A known method of receiving digital communication signals in multipath propagation (ie, when propagating in a channel with frequency selective fading), providing for the suppression (or compensation) of IP [4]. It provides for the compensation of an undesired interference effect by “combining reception on diversity antennas”. The use of this analogue is associated with the need for several receiving antennas, which is its drawback.

A known method of receiving digital communication signals in multipath propagation, based on the so-called Klovsky-Nikolaev algorithm (AKN) [2, p. 194] (prototype). This method is designed to receive a message containing a sequence of electronic signature, and provides for the execution of the following operations. An impulse response of the propagation channel (IRF) is estimated from a test pulse located in a fragment of the time interval for receiving a message that is known in advance at the receiving end. Based on the result of estimating the KFM at the receiving end of the communication system, the alphabet of possible EFs corresponding to all symbols of the transmitted messages is predicted (in this regard, the communication system described, in particular, in [1], is called the system with a test pulse and prediction (SIIP)). The number of possible (or permissible) ES sequences in a message is finite; each of them is hereinafter referred to as an alternative to the indicated sequences, and the assumption of which of these alternatives is accepted is called a hypothesis (of the accepted alternative). With the known (predicted) at the receiving end of the communication system, the set of alphabet symbols (i.e., the set of EPs), the form of the received sequence of EPs by which the entire message is transmitted, with each of these hypotheses being true, is known. In view of this circumstance, in the prototype, according to the signal observed over the time interval for receiving the message, in relation to the set of hypotheses of the EP sequence of the received message (taking into account the result of estimating the KFM), temporary implementations of the interference components due to interference are formed corresponding to these hypotheses (i.e., they form the corresponding IP).

Further, according to the signal observed at the time interval for receiving the message, the result of estimating the KFM, as well as the temporal implementation of the PI generated for each k-th alternative to the EP sequence, the decimal statistics (PC) are successively calculated in the prototype, each k-th of which is an estimate the energy of the signal generated as the difference between the observed signal implementation and the temporary implementation of the IP generated in relation to the k-th alternative of the EP sequence (hereinafter, the calculation result of the indicated difference is called a difference signal). When deciding on the actually adopted alternative to the EP sequence, the indicated PCs are compared with each other, and the index k ₀ is determined for that PC (that is, for that estimate of the energy of the indicated difference signal), which is minimal in amplitude (see [2], the relation (5.65) on p. 194).

.Note: when describing the prototype in [2, p. 194] the numbers of alternatives to the EP sequence are denoted as i, and the indicated index at the minimum level PC is denoted as

.

The disadvantage of the prototype is the relatively low noise immunity of reception (decoding) due to the following circumstances. Firstly, the principle of its operation is based on the fact that the energy estimate of the specified difference signal in calculating the PC corresponding to the really accepted alternative to the EP sequence is smaller than all other PCs only in the sense of a statistical trend, i.e. not guaranteed at all. However, this phenomenon is characteristic of all possible variants of PC formation. In this case, this effect is manifested to a special extent for the following reason. In the case of correctly guessing the accepted alternative to the EP sequence, there is a coincidence of the formed temporary implementation of the PI and PI, which is a component of the received signal implementation; in this case, when calculating the difference signal, the PI, which is a component of the received signal implementation, is compensated, and due to this, the energy of the difference signal decreases. But with a relatively small signal-to-noise ratio, this tendency is often (and possibly, as a rule) can be violated. This negative effect is due to the fact that the reception of messages is carried out with a disturbing effect (along with IP) and background noise. In the case of radio communications, this may be the electrical noise of the input circuits of the receiving stations, and in the case of sound underwater (hydroacoustic) communications, the noise of the sea and / or the noise of marine objects. In this case (i.e., with a small ratio of the total level of the received signal and IP to the background noise level), the compensation of the IP taking place in the calculation of the difference signal does not lead to a significant decrease in the level of this difference signal, since the indicated level is determined not so much by the IP as the background noise. The background noise during the formation of the difference signal is not compensated.

The second circumstance leading to a relatively low noise immunity of the reception is that the integration (accumulation) of the square of the difference signal is an incoherent accumulation, which entails a relatively low signal-to-noise ratio in the PC.

These effects lead to a relatively high probability of errors in decision making.

So, the disadvantage of the prototype is the relatively low noise immunity of the reception with a relatively small ratio of the total level of the received signal and IP to the background noise level.

The aim of the invention is to increase the noise immunity of receiving digital communication signals during the operation of a communication system in the presence of multipath interference.

The goal is achieved by the fact that in the method of receiving signals with interference compensation due to multipath interference, according to which, using the test pulse located in the fragment of the time interval for receiving the message known in advance at the receiving end of the communication system, the KFM estimation operation is performed, and the corresponding k- d (for k = 1 ... K, where K is the number of alternatives in the alphabet of transmitted EPs) from the admissible alternatives to EPs, the kth temporary implementation of IP, and the indicated formation of IP implementations taking into account the result of the estimation of the KFM, an array of differences {δ _k (t)} is formed, between the analyzed EP and each k-th of these IP implementations separately, for each of these differences δ _k (t), the k-th decisive statistics (PC ) z _k , and from the totality of these PCs they decide which EP is adopted, the operation of forming each kth PC z z _{k is} performed by calculating the correlation between the kth implementation of the difference δ _k (t) and the corresponding kth alternative to EP and the decision about what kind of EP adopted, endure by defining the index k = k ₀ for one of the co Pc z _k0 , which satisfies the condition z _k0 = max _k {z _k }.

A flowchart illustrating the inventive method is shown in FIG. 1, where are indicated:

- 1 - assessment of the KFM;

- 2 - the formation of temporary implementations of interference interference;

- 3 - formation of an array of differences {δ _k (t)};

- 4 - calculation of crucial statistics;

- 5 - making a decision.

Block diagrams of two variants of a device implementing the inventive method are shown in FIG. 2 and 3, where are indicated:

- 6 - buffer memory block;

- 7 - the first correlator;

- 8 - unit for determining delays and amplitudes of beams;

- 9 - block subtraction;

- 10 - block for the formation of temporary implementations of IP;

- 11 - block accumulation of signals in the rays;

- 12 - second correlator;

- 13 - decision block.

The following description of the combination of operations of the proposed method and the principle of its operation is accompanied by explanations based on block diagrams of variants of the device that implements this method (mainly that variant of the device, the block diagram of which is shown in Fig. 2).

Operation 1 (estimation of the KFM) is realized by calculating the cross-correlation function (FCF) between the fragment of the received signal containing the test pulse (mixed with noise) and the reference function of the correlator (this is the first correlator 7 in Fig. 2 and 3), matching in shape with this test impulse. The specified VKF is calculated in the range of its time arguments equal to the expected duration of the KFM. During the operation, the estimation of the KFM, the calculation procedure for the VCF will be supplemented by the procedure for determining the delays and amplitudes of the rays implemented by block 8 (see the flowchart in Fig. 2), i.e. the procedure for comparing each of the time samples of the indicated VKF with a threshold and if some samples exceed this threshold, fixing the values of the time argument of the VKF and its amplitude corresponding to these samples. The operation of estimating the KFM is provided in total by the combination of shown in the flowcharts shown in FIG. 2 and 3 of blocks 7 and 8. The dynamics of the collaboration of these blocks are described in detail, in particular, in the description of the patent [5]. At the same time, in the performance of this operation, the description given in the indicated source (see the block diagram in Fig. 1 given in the specified description [5]) involves blocks 2 and 3, which coincide in names, performed functions and technical implementation (including , according to the dynamics of work) with a set of blocks 7 and 8, respectively, shown in the block diagrams in FIG. 2 and 3 of the present description. Shown in the block diagrams of FIG. 2 and 3 of the present description, the buffer memory unit 6, when performing the operation, the estimation of the KFM simply transmits the received signal to the input of the correlator 2 (we are talking about the block diagram in Fig. 1 given with the above description [5]). A similar block performing the same functions is also present in the block diagram shown in FIG. 1 in the description [5] (where it is designated as block 1).

Note. Due to the fact that the indicated block of buffer memory 6 does not perform any functional conversion of the received signals (it only stores them and issues them to its outputs according to incoming commands, moreover, two of its functional outputs are shown in Fig. 2 and 3 conditionally and can be electrically implemented as one way out), the corresponding operation in the totality of the features of the proposed method is missing. Differences in the supply of received signals in the block diagrams shown in FIG. 1 on the one hand and 2 and 3 on the other hand (namely, in the block diagram in Fig. 1, these signals are fed to the inputs of operations 1 and 2 in parallel, and in the block diagram in Fig. 2 they are fed to the corresponding operations 1 and 2 blocks 7 and 9 - through block 6), due to the lack of the totality of the features of the proposed method of the operation of storage (buffering) of received signals. These differences are overcome if we assume that in the inventive method before supplying the received signals to the inputs of operations 1 and 2, their buffering is implied.

The result of operation 1 is the assessment of the KFM, characterized by a combination of delays and amplitudes of the rays (referring to delays of the rays relative to the ray arriving first, i.e., characterized by a minimum propagation time).

Operation 2 (the formation of temporary IP implementations) provides for the alternate formation of K temporary IP implementations on the time interval of receiving the EP, each k-th of which corresponds to the corresponding reception hypothesis, i.e. of the kth alternative to ES S _k (t). The content of this operation depends on the variant of the device that implements the inventive method. So, with a variant of said device, the block diagram of which is shown in FIG. 2, operation 2 is implemented as follows.

The accepted multipath EP (its kth alternative) y _k (t) has the form

moreover, S _k (t) = 0 for t <0 or for t> T _ep ,

и

(при

) - соответственно амплитуда и временная задержка ЭП, принятой по

лучу (имеется в виду задержка относительно ЭП, пришедшей в точку приема первому, т.е.

лучу; при этом по определению

); L - количество лучей, по которым в точку приема приходит каждая ЭП; Т_эп - длительность ЭП. (Далее для упрощения изложения и без изменения сущности заявляемого способа полагается, что оценки амплитуд и временных задержек лучей совпадают с их истинными значениями.) Оценки задержек ЭП, принимаемых по совокупности L лучей, формируются на правом выходе блока 8 (это блок определения задержек и амплитуд лучей, показанный на блок-схеме на фиг. 2), а оценки амплитуд ЭП, приходящих по этим лучам, формируются на левом выходе указанного блока 8 (в варианте реализующего заявляемый способ устройства, блок-схема которого приведена на фиг. 3, указанные оценки формируются на тех же выходах того же блока 8).Where

and

(at

) -, respectively, the amplitude and time delay of the ES, taken by

beam (meaning the delay relative to the electron beam that arrived at the receiving point of the first, i.e.

ray; while by definition

); L is the number of rays along which each electron beam arrives at the receiving point; T _ep - the duration of EP. (Further, to simplify the presentation, and without changing the essence of the proposed method, it is assumed that the estimates of the amplitudes and time delays of the rays coincide with their true values.) Estimates of the delays of the electron beam received from the set of L rays are formed on the right output of block 8 (this is a block for determining delays and amplitudes rays, shown in the block diagram in Fig. 2), and estimates of the amplitudes of the electromotive force coming from these rays are formed on the left output of the indicated block 8 (in the embodiment of the inventive method of the device, the block diagram of which is shown in Fig. 3, indicated s assessment are formed on the same outputs the same block 8).

указанной оценки с нижнего выхода блока 6 читается (в объекте [5] это осуществляется для дальнейшего накопления ЭП по всем лучам) фрагмент временной реализации принятого сигнала, содержащий ЭП, принятую по

лучу (эта функция подробно описана в [5]). При этом ЭП, принимаемая по указанному

лучу, перекрывается во времени с такими же ЭП, принимаемыми по всем тем лучам, абсолютная величина разности задержек которых с задержкой

луча не превышает длительности ЭП Т_эп, т.е. лучам, задержки которых удовлетворяют следующему условиюThe principle (dynamics) of interaction between blocks 6 and 8 that implements the inventive method of the device (the block diagram of which is shown in Fig. 2) consists in the fact that the delay estimates of the delays and amplitudes of the rays 8 are sequentially evaluated at the control input of the block of buffer memory 6 from the left output rays upon receipt of each

the indicated estimate from the lower output of block 6 is read (in the object [5] this is done for the further accumulation of the electron beam over all beams) a fragment of the temporary implementation of the received signal containing the electron beam received by

ray (this function is described in detail in [5]). In this case, the EP accepted for the specified

beam, overlaps in time with the same EP, taken for all those rays, the absolute value of the delay difference of which is delayed

beam does not exceed the duration of the EP T _ep , i.e. rays whose delays satisfy the following condition

лучу, соответствующая ей временная реализация ИП

(с учетом соотношения (1)) вычисляется какIn this case, when taking the k-th alternative to EP, which came according to

beam, the corresponding temporary implementation of IP

(taking into account relation (1)) is calculated as

принимает все значения в интервале 1…L за исключением значения

; тот факт, что индекс номера луча, участвующего в суммировании в (3), должен удовлетворять соотношению (2), может не оговариваться, поскольку все те слагаемые суммы (3), которые соответствуют ЭП, принимаемым тем по лучам, которые с

лучом во времени не перекрываются, и так никакого вклада в это сумму не вносят.where the record of the limits of summation in (3) means that, when summing, the index of the ray number

takes all values in the interval 1 ... L except for the value

; the fact that the index of the number of the ray participating in the summation in (3) must satisfy relation (2) may not be stipulated, since all the summands of the sum (3) that correspond to the EPs taken by those rays that

they do not overlap in time, and so do not contribute to this amount.

, меняющийся в диапазоне 1…L, введен наряду с индексом номера луча

только для того, чтобы имелась возможность оговорить условие

в соотношении (3). Далее необходимости учета указанного условия нет, поэтому используется только индекс номера луча

(вместо

).Explanation: Beam number index

varying in the range 1 ... L, introduced along with the index number of the beam

just to be able to stipulate a condition

in relation (3). Further, there is no need to take into account the indicated condition, therefore, only the beam number index is used

(instead

)

. При этом при формировании на выходах блока 8 оценок амплитуды и задержки каждого

луча наряду с чтением с нижнего выхода блока 6 фрагмента временной реализации принятого сигнала, содержащий ЭП, принятую по этому

лучу, осуществляется вычисление временной реализации ИП

.Operation 2 in the process of practicing the claimed method of the set of operations for the formation of each k-th (of their total number K) PC provides for L-fold formation in accordance with relation (3) of the temporary implementation of IP

. Moreover, when forming at the outputs of block 8 estimates of the amplitude and delay of each

beam along with reading from the lower output of block 6 of the fragment of the temporary implementation of the received signal containing the electronic signal received on this

ray, the calculation of the temporary implementation of IP

.

The fact that operation 2 on the time interval of receiving the ES is performed repeatedly, on the presented block diagrams of the proposed method, as well as variants of the devices implementing it, is not reflected for simplicity, but is implied. The same applies to operations 3 and 4.

, полученных по совокупности лучей, т.е.Operation 3 (the formation of an array of differences {δ _k (t)} is implemented as shown in the block diagram of the inventive method of the device shown in Fig. 2, the subtraction unit 9. Moreover, under each difference δ _k (t) is understood a combination of L differences

obtained by the totality of rays, i.e.

.at

.

вида (4). Все эти разности поочередно (в пределах интервала времени приема одной ЭП) вычисляются при выполнении операции 3; в реализующем заявляемый способ варианте устройства, блок-схема которого представлена на фиг. 2, эта операция выполняется блоком 9.The array of differences {δ _k (t)}, formed in relation to each of the set K of alternatives of L-beam EP, contains K indicated differences, each of which refers to one (ie, k-th) of the alternatives of Z-beam EP, each of these differences in turn contains L differences

type (4). All these differences in turn (within the time interval of receiving one ES) are calculated during operation 3; in an embodiment of the device implementing the claimed method, the block diagram of which is shown in FIG. 2, this operation is performed by block 9.

Operation 4 (calculation of decision statistics) is implemented as follows. Each k-th PC z _{k is} calculated, for example, by the formula

- есть корреляция между разностью

и опорной функцией, совпадающей по форме с k-й альтернативой ЭП S_k(t). Здесь и далее начало отсчета времени при приеме очередной ЭП отсчитывается от момента приема ее переднего фронта.In relation (5), summation is carried out over the rays, and integration from the product

- there is a correlation between the difference

and a support function that coincides in form with the kth alternative to the electromotive force S _k (t). Hereinafter, the beginning of the countdown when receiving another EP is counted from the moment of receiving its leading edge.

A variant of calculating PC by formula (5) is also possible when changing the order of summation and integration in it, i.e. view variant

In an embodiment of the inventive method of the device, a block diagram of which is shown in FIG. 2, the calculation of the PC is actually carried out in accordance with formula (5a), and it is implemented by a combination of signal accumulation blocks in the beams (block 11) and the second correlator (block 12).

Operation 5 (decision making) is realized by comparing all PC z _k and determining the index k = k ₀ for that of the set PC z _k0 that is among them the maximum in level, i.e. satisfies the condition

In the embodiment described above that implements the inventive method of the device, the block diagram of which is shown in FIG. 2, the compensation of the PI is carried out before the K-time calculation of the correlation of the received signal with the reference functions that coincide with the alternatives of the EP. Meanwhile, the operations of compensation of the PI (i.e., subtraction) and calculation of the correlation of the received signal with each of K fixed reference functions are linear, and therefore, when the order of their execution is changed, the processing result will not change. This provision substantiates the equivalence of device variants, block diagrams of which are shown in FIG. 2 and 3.

In an embodiment of the device, the block diagram of which is shown in FIG. 3, the correlation calculation procedure is first implemented (the second correlator 12 in the flowchart of FIG. 3) and only then the IP compensation (subtraction block 9 in the flowchart of FIG. 3). In this embodiment of the device, there is, in particular, the following feature of the operation: the formation of temporary realizations of IP (in comparison with a variant of the device, the block diagram of which is shown in Fig. 2), namely, in this case, this operation is implemented as follows.

Let the temporal implementation of the autocorrelation function (ACF) of the k-th alternative to the electron beam - Ω _k (τ). A modified ACF (MAKF) of the k-th alternative to the EP of the form is introduced

и

означают, что временной аргумент t АКФ Ω_k(t) соответственно принадлежит и не принадлежит интервалам

при всех

.where τ _k is the correlation interval of the electron beam (defined as τ _k = 1 / F, where F is the frequency bandwidth of the electron beam); records

and

mean that the time argument t of the ACF Ω _k (t) respectively belongs and does not belong to the intervals

for all

.

The formation of temporary IP implementations (performed by block 10 of the formation of temporary IP realizations) in this case is performed according to the following rule:

Thus, in an embodiment of the inventive method of the device, the block diagram of which is shown in FIG. 3, the operation of generating temporary IP implementations is not carried out separately for the EF received for each beam (as was the case with the device, the block diagram of which is shown in Fig. 2), but for the whole multipath EF as a whole (and this is for each alternatives to EP individually).

Note. When describing the two options under consideration that implements the inventive method of the device functionally equivalent data correspond to their matching designation. It does not follow from this that all these data in the two device variants are quantitatively the same.

Otherwise, the considered embodiment of the device operates as follows. Over the entire time stored in block 6 of the temporary implementation of the received signal (at the time of the next EP arrival) in the aggregate of blocks 7 and 8, the estimation of the KFM is implemented (in the same way as in the embodiment of the device, the block diagram of which is shown in Fig. 2), and in the second correlator 12, the K-fold calculation of the VKF between this implementation and the support functions that coincide in form with the k-alternatives to the EF. As a result, at the output of the correlator 12, K indicated VKF R _k (t) are formed at k = 1 ... K. The range of variation of the time argument τ of each of these VKF is equal to the estimated duration of the KFM.

Next, in the subtraction unit 9, the calculation of K differences

Each k-th at k = 1 ... K, which is further formed in block 11, the result of the accumulation of signals in the rays, which is actually an array of K PC z _k , is defined as a sum of the form

The results of calculations by formula (10) are equivalent (not only functionally, but in this case practically and quantitatively) to PCs of the form (5) and (5a).

Next, in the decision block of the device in question, an index z _{z0 is formed} in accordance with rule (6).

Thus, despite the fact that in the embodiment of the device, the block diagram of which is shown in Fig. 3, the order of the signal transformations does not coincide with that specified in the claims, this embodiment of the device is equivalent to the embodiment of the device, the block diagram of which is shown in Fig. 2 (it is composed of a variant, the block diagram of which is shown in Fig. 2, by reversing the sequence of operations for calculating correlations and subtractions, which are linear). In connection with the foregoing, implementing the inventive method, the device, a block diagram of which is shown in Fig. 3 (it is arranged on the basis of the same inventive solution as the device, the block diagram of which is shown in Fig. 2), should be considered an example (option) of a device that implements the inventive method.

All blocks of all variants of the device implementing the inventive method are performed on programmable hardware for digital signal processing. In addition, these devices (as the claimed method itself) are 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 ES are known. In principle, it is possible, for example, to implement synchronization with the implementation of the transmitter and receiver in a single time system; while the propagation time of the signal from the transmitter to the receiver is known. In this case, a device implementing the inventive method includes a timer, which generates a synchronization signal at the moment of the arrival of the leading edge of each ES to not omitted in FIG. 2 and 3 sync inputs of all blocks 6 ... 13. At the moment of supplying the synchronization signal, the execution of its function by block 6 begins and then with small delays relative to each other - by blocks 7 ... 13.

Hardware synchronization in the composition of these devices (as well as their corresponding operations in the composition of the proposed method) are not included, since the vast majority of digital (discrete) communication systems are synchronous, and therefore, the specialist does not need to specify (describe) synchronization tools to reproduce the claimed object.

The technical effect is to increase the noise immunity of receiving digital communication signals during the operation of a communication system in the presence of multipath interference - is achieved in the inventive method due to the fact that its principle of operation is based on coherent (correlation) processing of received EPs, providing the maximum possible signal-to-noise ratio in the generated PC on which the decision is made.

The scope of this invention is not limited to the examples of devices described in the description, which are merely illustrative, and the appended claims should be considered in light of possible equivalents.

Literature

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2. Zyuko A.G., Klovsky D.D., Korzhik V.I., Nazarov M.V. Theory of Electrical Communication / Ed. Klovsky D.D. - M.: Radio and Communications, 1999 .-- 432 p.: Ill.

3. IEEE 802.11a, b, g, n standard. Wi-Fi wireless data networks. (Internet resource; type the given article title, for example, in Yandex).

4. Bottomley Gregory E. Method and device for suppressing interference in multi-antenna digital cellular communication systems. RF patent No. 2137302.

5. Golubev A.G. "A device for decoding discrete signals propagating in a multipath channel." Pat. RF number 2560102.

Claims (2)

A method of receiving signals in a digital communication system with compensation for interference caused by multipath interference, according to which, using a test pulse located in a fragment of the time interval for receiving a message known in advance at the receiving end of the communication system, the pulse propagation channel response (IRF) operation is evaluated, and corresponding to each kth (where k = 1 ... K, where K is the number of alternatives in the alphabet of transmitted EPs) of the admissible alternatives to EPs, the kth temporary implementation of interference th interference (SP), said formation implementations SP is performed considering the result of estimation KFM, form an array of differences {δ _k (t)}, between the analyzed EPO and each k-th of said implementations SP individually, for each of these differences is formed the k-th decisive statistics (PC), and from the totality of the indicated PCs they decide which EP is adopted, characterized in that each k-th (for k = 1 ... K) PC z _{k is} formed by calculating the correlation between k- th implementation of the difference δ _k (t) and k-th alternative to ES, and the decision about what is at the EP Yata, adopt by definition the index k = k ₀ for one of the plurality of PC z _k0, which satisfies z _k0 = max _k {z _k }.

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