RU2723269C1 - Method for synchronizing receiving and transmitting devices of a radio link using short-pulse ultra-wideband signals - Google Patents

Abstract

FIELD: radio engineering and communication.SUBSTANCE: invention relates to radio engineering and can be used in development of high-speed information transmission systems, multiple access systems and other radioelectronic systems and facilities using complex signals with high noise immunity and stealthiness of transmission. Technical result of the claimed technical solution is achieved by forming a stack of several time windows shifted relative to each other by the duration of one time window, wherein one stack time cycle covers the average pulse repetition period of the ultra-wideband clock signal, based on the results of comparing the energy count values in the previous and subsequent stack time windows, performing their weight processing.EFFECT: high rate of estimating the value and the sign of the delay of the ultra-wideband clock signal, as well as shorter time for entry into synchronism.1 cl, 19 dwg

Description

The invention relates to the field of radio engineering and can be used in the development of high-speed information transmission systems, multiple access systems and other electronic systems and tools using complex signals with increased noise immunity and stealth transmission.

It is known [1] that the most important process on which the effective functioning of ultra-wideband (UWB) systems and means of transmitting information depends is the synchronization of the transmitting and receiving device of the radio lines, since they are always spaced over a considerable distance in space and can relate to mobile wireless systems. Here in [1] a brief overview is given listing the main features and disadvantages of the most well-known synchronization methods. In this case, the main disadvantages of the above methods is the amount of time it takes to synchronize and the need for large signal-to-noise ratios at the input of the receiving devices.

In [2] and [3], the so-called “searchless” synchronization methods are presented. The method described in [2] is based on the use of discrete UWB clock filtering. However, it also has a synchronization time of at least two periods of the UWB clock. The method described in [3] involves dividing the entire UWB signal into K non-intersecting time intervals for their subsequent cepstral processing. But before it, it is necessary to stretch in time each such interval, using delays for this, for the implementation of which K delay lines will be required. In general, a rather complicated algorithm is obtained, which is time-consuming and requires additional technical costs.

The closest analogue in technical essence to the proposed one is the method described in [4], adopted as a prototype.

The prototype method implements synchronization using energy detection of UWB signals (energy storage of a pulse packet of UWB signals) and consists in the following.

On the receiving side, a mixture of UWB signal with noise from the output of the antenna device enters five organized signal time channels (ICS) tuned to time intervals offset from each other, equal in magnitude to the duration of the UWB signal, the first three of which form a time discriminator for searching for UWB signal and capture state of synchronism. From the outputs of these ICS, the accumulated energy of the mixture of a packet of pulses of UWB signal and noise is transferred to an analog-to-digital converter (ADC), where it is digitized and further processed in digital form.

The capture of the synchronism state is ensured by the search for additionally emitted synchronization (basic or reference) pulses that do not change their location in the pulse train of the UWB signal. Search and detection of UWB signal is carried out by the correlator, at the output of which, after a certain number of time shifts of a given value, introduced into the CRS, the maximum of the correlation function is fixed. This moment will be considered the moment of capturing the state of synchronism. On this, the task of detecting the signal and capturing the state of synchronism is considered solved.

The retention of this state is carried out in the process of receiving UWB signals as follows. The previous and subsequent ICS relative to the main ICS of the first three monitor the speed of the UWB signal going to the front or rear ICS, assessing the magnitude and sign of their temporal displacement from the main channel. Based on these estimates, the frequency and phase of the clock generator (synchronizer) of the receiving device are adjusted, compensating for such departures and thereby ensuring that the state of synchronism is maintained in all ICS, including the other two ICS, which receive information zeros and units of the transmitted message.

Since the time of arrival of the UWB signal is unknown, in this case the average time of synchronization when using the correlator should be much longer than two periods of the duration of the UWB signal.

In the prototype method, it should be possible to reduce the time it takes to enter the synchronism state, that is, increase the capture speed without using correlators and matched filters, as well as provide the possibility of continuous tracking of the delay in the receiving ICS and correcting the pulses of the useful UWB signal from the time window of the receiving ICS . In FIG. 1a) presents a variant of the generated seven-element (N = 7) UWB sync signal of unit amplitude together with the current time windows in the signal (gray) and noise (black) time channels. In FIG. 1b) shows an enlarged section of this signal, which shows the shape of the UWB pulses of the clock signal.

– условное изображение текущей энергии смеси импульса СШП синхросигнала и канального шума (или только канального шума), поступающей на вход стека. Здесь u₀(t) – текущее напряжение импульса СШП синхросигнала на входе стека; ν(t) – гауссовский шум с нулевым средним значением и спектральной плотностью мощности N₀ [Вт/Гц]. Среднее «оконное» энергетическое отношение сигнал/шум

≈ 5,5 (7,4 дБ)In FIG. Figure 2 presents four main cases that are possible in the process of detecting UWB clock and capturing the synchronism state. Here, the current time window of the stack is represented by a gray color, which represents signal time channels whose time windows are shifted in time relative to each other by the duration of one time window 2τ ₀ (τ ₀ is the duration of the UWB pulse of the clock signal), one time cycle of the stack window overlaps the average the pulse repetition period of the UWB pulses of the clock signal T _cf , and in black - the subsequent time window of the stack;

- a conditional image of the current energy of the mixture of the UWB pulse of the clock signal and channel noise (or channel noise only) supplied to the input of the stack. Here u ₀ (t) is the current voltage of the UWB pulse of the clock signal at the input of the stack; ν (t) is a Gaussian noise with a zero mean value and a power spectral density of N ₀ [W / Hz]. Average “window” signal-to-noise energy ratio

≈ 5.5 (7.4 dB)

In FIG. 2a) is the case when all the energy of a mixture of UWB pulses of a clock signal and channel noise falls inside the current time window of the stack.

In FIG. 2b) is the case when a smaller part of the energy of the mixture of UWB pulses of the clock signal and channel noise fall inside the current time window of the stack, and most of it goes inside the subsequent time window of the stack.

In FIG. 2c) is the case when the energy of a mixture of UWB pulses of a clock signal and channel noise is distributed fairly evenly between the current and subsequent time windows of the stack.

In FIG. 2d) - the case when most of the energy of the mixture of UWB pulses of the clock signal and channel noise falls inside the current time window of the stack, and a smaller part inside the subsequent time window of the stack.

From the analysis of FIG. 2 it follows that in the first case, the total total sup-threshold energy of the mixture of momentum and channel noise in the form of a reference of a certain value will be fixed at the end of the current current time window of the stack. In the second case, a smaller part of the total suprathreshold energy of the mixture of momentum and channel noise in the form of a reference of its value can be fixed at the end of the current time window of the stack, and most of it in the form of a reference of its value - at the end of the subsequent time window of the stack. In the third case, as in the second, the total above-threshold energy of the mixture of momentum and channel noise in the form of readings of its value can be fixed at the end of the current and subsequent time windows of the stack. Finally, in the fourth case, most of the total suprathreshold energy of the mixture of momentum and channel noise in the form of a reference of its magnitude can be fixed at the end of the current time window of the stack, its smaller part - at the end of the subsequent time window of the stack. Therefore, the disadvantage of the prototype is the need to constantly monitor the state of the current and subsequent time windows of the stack in order to determine the value of the total energy samples in them to use the estimate of the value of these samples in determining the value and sign of the time delay, which must be entered into the time windows of the stack to capture the state of synchronism and maintaining this state in the future when receiving UWB information signals.

The objective of the proposed method is to quickly assess the magnitude and sign of the delay UWB clock signal with a simplified hardware implementation.

To solve the problem in the proposed method, which includes the organization of n signal time channels, according to the invention, the signal time channels are shifted in time relative to each other by the duration of the time window and are a stack, one time cycle of which overlaps the average repetition period of N pulses of ultra-wideband ( UWB) of the sync signal T _cp so that, on average, one pulse of the UWB sync signal is detected on each time cycle of the stack, and the relative operating time of each signal time channel in the cycle is 2τ ₀ / T _cf ; during the calibration process, the “window” energy of the channel noise is accumulated to average and estimate the standard deviation, which is used to determine the initial (reference) energy threshold Π ₀ , the value of which is periodically overestimated in the absence of UWB clock signal and the corresponding correction is introduced into all time signal channels ; in the presence of the UWB clock signal in the signal time channels of the stack, the suprathreshold energy of the mixture of pulses of the UWB clock signal with channel noise is accumulated for the duration of their current time windows of the stack; Further, the obtained current suprathreshold energies of the signal time channels are digitized, turning them into energy samples of various sizes, their number is calculated for the duration of the UWB clock signal, their temporal positions are recorded, these time positions are compared with their temporal positions in the recorded copy of the UWB clock signal and the results of comparing the energy values the accounts in the previous and subsequent time windows of the stack carry out their weight processing, as a result of which the magnitude and sign of the time delay are determined, the introduction of which into the signal time channels (ICS) of the stack will lead to the capture of the synchronism state; on this, the process of establishing synchronism between the transmitting and receiving devices of the radio link is considered completed and from this moment the process of receiving UWB information signals begins in one of the ICS stack, while the time from the moment of detection of the UWB reference pulse of the clock signal to the moment of receiving UWB information signals is about ( N + 1) T _cf.

The proposed method is as follows.

The clock signal from the antenna switch enters the stack, on each cycle of which an average UWB pulse of the clock signal can be detected on average, and the relative operating time of each time channel in the cycle will be 2τ ₀ / T _cf , therefore, the number of signal time channels can be estimated by the ratio:

n ≥ T _cf / 2τ ₀ .

When the stack is running for the duration of the current time window, the energy of the UWB mixture of the clock signal and channel noise (or one channel noise) is accumulated:

(1)

(1)

- полная энергия, накопленная в k-м временном окне стека;

- энергия импульса СШП синхросигнала, накопленная в этом временном окне;

- взаимная энергия импульса и канального шума, накопленная в этом же временном окне;

- энергия канального шума, накопленная на всей длительности k-го временного окна стека; k = 1, 2,…, n; T_p = 2pτ₀ – моменты начала накопления оконных энергий

. Here

is the total energy accumulated in the kth time window of the stack;

- pulse energy UWB clock signal accumulated in this time window;

- the mutual energy of the pulse and channel noise accumulated in the same time window;

- the energy of channel noise accumulated over the entire duration of the k-th time window of the stack; k = 1, 2, ..., n; T _p = 2pτ ₀ - moments of the beginning of the accumulation of window energies

.

и среднеквадратическое отклонение (СКО) шума σ_sh от среднего значения шумовой «оконной» энергии, которые используют для оценки величины начального (опорного) энергетического порога Π₀. С этим порогом сравнивается величина суммарной энергии, накопленной на длительности каждого из n временных окон стека и в отсутствии СШП сигналов величина опорного порога переоценивается каждый временной промежуток величиной NТ_ср с. In the absence of a UWB clock signal in the stack for a duration of NT _sr s, the average value of the window energy of the channel noise is estimated

and standard deviation (RMS) of noise σ _sh from the average value of the noise “window” energy, which is used to estimate the value of the initial (reference) energy threshold Π ₀ . The value of the total energy accumulated over the duration of each of the n time windows of the stack is compared with this threshold and, in the absence of UWB signals, the value of the reference threshold is reevaluated by the value of NT _sr .

In the presence of UWB clock:

- the values of the accumulated window energies are estimated (1);

;- on the duration of NT _cf using (1), the average value of the “window” energy of the mixture of the UWB pulse of the clock signal and channel noise is estimated

;

- the current values of the accumulated “window” suprathreshold energies are estimated

ΔE _k = E _{ss, k} - P ₀ , (2)

where ΔE _k is the suprathreshold part of the energy E _{ss, k} , which is digitized and is further called the energy reference.

The first excess of the energy threshold (ΔE _k > 0) corresponds to the first pulse in the existing UWB copy of the sync signal, the duration of which is T _ss , so the first detected pulse will be the reference, that is, its temporary position will serve as the beginning, a comparison with which will determine the temporary positions of the others detectable UWB pulses of the clock signal. In this case, at the end of the time T _ss after the detection of the first (reference) pulse, provided that at least two-thirds of the UWB pulses of the clock signal are detected during this time, the following situations may occur:

- the number of remaining detected pulses and their location do not coincide with their number and location in the existing copy with the vast majority of their shifts relative to each other;

- the number of remaining detected pulses and their location coincide with similar parameters in the existing copy;

- the number of remaining detected pulses is less than in the existing copy, but their location coincides with their location in this copy;

- the number of remaining detected pulses is less than in the existing copy, but their location does not coincide with their location in this copy;

- the number of remaining detected pulses exceeds the number of them in the existing copy, and the pulses in the received signal can be located in pairs in the neighboring time windows of the stack and in each pair there is a pulse whose location coincides with the location of a similar pulse in the UWB copy of the clock signal.

The first unlikely event characterizes the presence of powerful short-pulse interference, and further processing of the UWB clock is ignored. The remaining cases are typical for the presence of UWB clock in a mixture with channel noise, and the detected pulse sequence is subjected to appropriate processing. In this case, the fourth case requires special consideration. In this situation, it is most likely that the first pulse of the UWB clock signal was suppressed and the next pulse was taken as the reference one instead. Or, more than one of the first UWB pulses of the clock signal was suppressed. Therefore, it is necessary to combine the position of the received reference pulse with the position of the second or third, and so on, by successive shifts. pulses in a copy of the UWB clock signal until the positions of the remaining received pulses of the UWB clock signal coincide with the positions of similar pulses in its copy. If there is no coincidence of the positions of the remaining pulses, then the work registers are zeroed and the process of searching for the UWB clock and the synchronization state acquisition continues.

In FIG. 3 illustrates, by way of example, a situation corresponding to the case depicted in FIG. 2b). In FIG. 3a) shows the preliminary processing steps:

– энергетические отсчёты смеси импульсов СШП синхросигнала и канального шума, временные позиции которых соответствуют моментам окончания соответствующих временных окон стека (заполненные кружки);

- energy readings of the mixture of UWB pulses of the clock signal and channel noise, the temporary positions of which correspond to the moments of the end of the corresponding time windows of the stack (filled circles);

– энергетические отсчёты канального шума, оценённые во временных окнах шумового канала и приведённые к временным позициям энергетических отсчётов смеси импульсов СШП синхросигнала и канального шума (пустые крупные квадраты);

- energy samples of channel noise estimated in time windows of the noise channel and reduced to temporary positions of energy samples of a mixture of UWB pulses of a clock signal and channel noise (large empty squares);

- энергетические отсчёты канального шума, оценённые во временных окнах стека (заполненные ромбики) – приведены для сравнения;

- energy samples of channel noise, estimated in the stack time windows (filled rhombs) - are given for comparison;

, поступившие на вход стека; also for comparison by a solid thin line - values

received at the entrance to the stack;

bold black dashed horizontal line shows the initial (reference) energy threshold P ₀ .

. The close-ups shown in FIG. 3b) - FIG. 3h) in the corresponding time windows of the stack, correspond to the energy readings described above against the background of the value

.

The analysis of FIG. 3 shows:

и

в среднем мало отличаются друг от друга, что доказывает правомерность использования шумового канала для оценки текущих значений энергетических отсчётов канальных шумов в текущих временных окнах стека;- current values

and

on average, they differ little from each other, which proves the legitimacy of using a noise channel to estimate the current values of the energy readings of channel noise in the current time windows of the stack;

- all values of energy readings are under the reference energy threshold, which indicates the rationality of its formation;

- the number of above-threshold energy readings (4) is greater than N, and the vast majority of them are located in pairs in adjacent time windows of the stack;

- the values of all N energy samples located in the current time windows of the stack (gray window) are on average much smaller than the values of N energy samples located in the subsequent time windows of the stack (black window), which means that each UWB sync signal pulse is located in the time windows of two adjacent time windows of the stack is very asymmetric.

The analysis leads to a method for processing the obtained sequences of energy samples of a UWB mixture of a clock signal with channel noise, the essence of which is as follows.

t₁ и совмещают её с положением первого импульса в копии СШП синхросигнала, хранящейся в регистре;1. Determine the temporary position of the first (reference) energy readout

t ₁ and combine it with the position of the first pulse in the UWB copy of the clock stored in the register;

.2. The numerical values and temporary positions of excesses of the current energy threshold are recorded by energy readings

.

3. Allocate above-threshold pulses, the temporary positions of which coincide with the corresponding positions of the pulses in a copy of the UWB sync signal stored in the register, into the first subsequence: E ₁ = {ΔE _{cc, 0} ; ΔE _{cc, 2;} ...; ΔE _{cc, 2p} ; ...}, T ₁ = {t _1.0 ; t _1,2; ...; t _1,2p ; ...}.

4. Allocate suprathreshold pulses, the temporal positions of which do not coincide with the corresponding positions of the pulses in the second sequence of pulses of the UWB sync signal stored in the register, but are adjacent to them: E ₂ = {ΔE _{cc, 1} ; ΔE _{cc, 3} ; ...; ΔE _{cc, 2p + 1} ; ...}, T ₂ = {t _2.1 ; t _2.3; ...; t _{2,2p + 1} ; ...}.

5. Estimate the number of nonzero terms in both sequences: N ₁ and N ₂ .

6. The normalized differences in the time positions of the obtained sequences of suprathreshold energy samples are determined.

, (3)

, (3)

h = 1, 2, ..., 2N.

7. Estimate the value of the minimum difference (3) and the number of such differences on the duration of the UWB clock

. (4)

. (4)

8. Calculate the reduced durations of the parts of the current UWB pulses of the clock located in adjacent time windows of the stack:

(5)

(5)

9. Spend smoothing values (7):

(6)

(6)

, а на самом деле должна равняться единице. Следовательно, необходимо скомпенсировать вредное влияние канальных шумов. Для этогоMoreover, in noise, as a rule, the sum

, but in fact should be equal to one. Therefore, it is necessary to compensate for the harmful effects of channel noise. For this

.10. Estimate the difference:

.

11. Calculate the equalization coefficients, with which you can partially compensate for the negative effect of channel noise on the final result

. (7)

. (7)

12. Make compensating amendments to (8)

. (8)

. (8)

.If everything is done correctly, then a check will give

.

At its core, the process described by relations (5) -80) implements a variant of specific weight processing of a mixture of UWB pulses of a clock signal with channel noise, and the weights found characterize the ratio of the energies of the mixture of pulse and channel noise falling into neighboring time windows of the stack.

13. The difference of values (8) is translated into real time:

(9)

(9)

14. An estimate is made of the magnitude and sign of the time delay that must be entered into the shapers of the time windows of the stack in order to capture the synchronism state of the transmitting and receiving devices of the radio line, which will be equivalent to shifting all UWB pulses of the clock signal to the middle of the current time windows selected from the stack to receive one of information symbols of the alphabet (for example, information zero) of the shaper of time windows:

(10)

(10)

15. Enter the received delay into all temporary channels of the stack.

16. At the same time, all the ICS of the stack are disabled, except for one, in which they begin to receive UWB information signals.

Values (3) will be required to evaluate and use the dynamic threshold П _д , which is a function (3) and the average probability of the correct reception of the UWB signal, in the process of receiving UWB information. Its use compensates to some extent the negative impact of changes in the interference environment.

In FIG. Figure 4 shows a conditional example of the location of the time windows of the receiving ICS relative to the location of the current energies of the mixture of UWB pulses of the clock signal and channel noise E _cc (t) calculated in the current time windows of this ICS for the duration of the received information symbol, which was transferred by the UWB signal generated on the basis of the "sparse "Neumann-Hoffman code. FIG. 4a) represents the case when the delay was not introduced into the receiving ICS, and in FIG. 4b) - the case when it is introduced. Here, gray rectangles indicate the positions of the time windows of this ICS. As follows from the analysis of FIG. 4a ^/ ) and FIG. 4b ^/ ), on which fragments of FIG. 4a) and FIG. 4b), the introduction of the calculated delay really sets the UWB pulses of the sync signal to the middle of the time window of this ICS (or rather, this current time window of this ICS corrects its time position so that the pulses of the information UWB signal occupy its middle), which is equivalent to the synchronism state at receiving information UWB signal.

From the analysis it follows that the duration of the entire process of capturing the synchronism state after the detection of the UWB reference pulse of the clock signal does not exceed the N + 1th cycle of the stack functioning, which corresponds to the time

T _I = (N + 1) · T _cf. (eleven)

Thus, using the proposed method, it is possible to ensure the claimed qualities by realizing the time it takes to enter the synchronism state equal to the average duration of the UWB clock signal, which is on average better than when using any of the listed analog methods and the prototype method.

An enlarged block diagram of a device for implementing the proposed method is presented in FIG. 5, where the following notation is introduced:

1.1 - 1n - signal time channels (ICS) of the stack;

2 - multiplexer (M);

3 - processing and control unit (BOW);

4 - block synchronization (BS).

The device contains n signal time channels of the ICS stack, a multiplexer 2, a processing and control unit 3 and a synchronization unit 4, while from the first to the n-th outputs of the BOC 3 are connected to the second inputs of the ICS 1.1 - ICM 1.n, respectively, n outputs of which are connected with the corresponding inputs of multiplexer 2, the output of which is connected to the first input of the BOW 3, the n + 1st output of which is connected to the input of the synchronization unit 4, the n + 1st output of which is connected to the second input of the processing and control unit 3, the input / output of which is the third input / output of the device. From the first to the n-th outputs of BS 4 are connected to the third inputs of the ICS 1.1 - 1.n of the stack, respectively, the first inputs of which are connected to the output of the antenna switch (not shown in Fig. 5).

The device operates as follows. When a start command is input to the input-output of the BOW 3, the antenna switch is set to the “receive” position, the BS signal 3 is received at the BS input 4 from the (n + 1) -th output of the BOW 3, the start signal is sent to the second input of the BOW 3 (n + 1 ) of the BS 4 output at a given pace, clock pulses will begin to be received, necessary to control the state of the ICS 1.1 - 1.n, the second inputs of which will receive signals from the corresponding outputs of the BOU 3, including the ICS 1.1 - 1.n in operation. At the same time, synchronizing clock pulses will start to arrive at the third inputs of the SVK 1.1 - 1.n from the corresponding outputs of BS 4 at the appropriate rate to control the temporary positions of the temporary windows of the stack. At the first inputs of SVK 1.1 - 1.n, either channel noise or a mixture of UWB pulses of a clock signal with channel noise will begin to arrive from the output of the antenna switch. First, the SVK stack is calibrated for channel noise, the main task of which is to set the initial (reference) energy thresholds in time windows. In this case, after the start signal, until the reference threshold P _{0 is} established in the CRS 1.1 - 1.n, the energy stored in the current CRS of the stack (1) with the rate of existence of the stack temporary windows will go from the outputs to the corresponding inputs of the multiplexer 2, and from the output of the multiplexer 2 the first input of the BOW 3 these accumulated energies will arrive sequentially in accordance with the sequence of work of the temporary windows of the stack. In BOU 3 energies (1) are digitized and an estimate of the value of the initial (reference) energy threshold P _{0 is set} , which is set in all CRS 1.1 - 1.n. Calibration must be performed after the start signal is issued or after the UWB signal is lost during reception. After its completion, the process of searching for UWB clock and the synchronization state is captured. At the same time, the accumulated above-threshold energies of the UWB mixture of the sync signal and channel noise (or one channel noise) ΔE _k (2) will be received from the outputs of the ICS 1.1 - 1.n at the corresponding inputs of multiplexer 2, and from the output of multiplexer 2 to the first input of the BOC 3 in time, the sequence of quantities ΔE _k , the elements of which in BOW 3 will be digitized and counted, turning into the current sequence of energy readings with fixed time positions t _h . Simultaneously with the accumulation of energy readings in BOU 3, operations (3) - (10) are carried out and at the end of the time interval T _I (11), the received delay (10) is introduced into the ICS stack and the receiving ICS stack is selected with the remaining ICS disabled by sending the appropriate signals from n outputs of the BOW 3 to the second inputs of the ICS 1.1 - 1.n. This completes the synchronization process, and then the reception of information UWB signals will be carried out.

The implementation of the device implementing the proposed method does not cause difficulties, since the functional units included in the device blocks are well known, widely used in domestic and foreign patents, and are also described in the technical literature. Almost all blocks except multiplexer 2 are given in [4] and [5]. Variants of execution of multiplexers are known, for example, from [6].

Sources of information

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2. Ageykin, V.I. On the issue of using ultra-wideband signal technology in the interests of creating promising means of communication, reconnaissance, and electronic warfare of the tactical command link / V.I. Ageikin, L.M. Kaplyarchuk, A.P. Stepanov // Electronic warfare in the Armed Forces of the Russian Federation, part 1. - 2017, p. 40-44.

3. Patent 2416162 (RF). Asynchronous method for extracting encoded information transmitted to the consumer using ultra-wideband pulses. IPC H04B 7/00. Zhbanov I.L., Silaev N.V., Mitrofanov D.G., Senkov M.A., Zhbanova V.L., Vasilchenko O.V., Gavrilov A.D. Application No. 2009146425/09 of 12/14/2009. Publ. 06/20/2010 r.

4. Kornienko A.V. Algorithms for the synthesis and processing of short-pulse ultra-wideband signals in radio transmission systems, taking into account interfering factors. / Abstract of dissertation for the degree of candidate of technical sciences. - Ryazan. - 2008 .-- S. 17.

5. Patent 2315424 (RF). A communication system with a high speed information transmission by ultra-wideband signals. IPC H04B 1/69, H04L 5/26. Bondarenko V.V., Kyshtymov G.A., Bondarenko V.V., Kyshtymov S.G. Application No. 2006119887/09 dated 06.06.2006. Publ. January 20, 2008

6. Goldenberg, L.M. Pulse devices / L.M. Goldenberg. - M .: Radio and communications, 1981. - 224 p.

Claims (1)

A method of synchronizing the receiving and transmitting devices of a radio line, including organizing n signal time channels, characterized in that the signal time channels are offset in time relative to each other by the duration of the time window and are a stack, one time cycle of which overlaps the average repetition period of N pulses of ultra-wideband ( UWB) of the sync signal T _cp so that, on average, one pulse of the UWB sync signal is detected on each time cycle of the stack, and the relative operating time of each signal time channel in the cycle is 2τ ₀ / T _cf ; during the calibration process, the “window” energy of the channel noise is accumulated to average and estimate the standard deviation, which is used to determine the initial energy threshold Π ₀ , the value of which is periodically overestimated in the absence of UWB clock signal and appropriate correction is introduced into all time signal channels; in the presence of the UWB clock signal in the signal time channels of the stack, the suprathreshold energy of the mixture of pulses of the UWB clock signal with channel noise is accumulated for the duration of their current stack time windows; Further, the obtained current suprathreshold energies of the signal time channels are digitized, turning them into energy samples of various sizes, their number is calculated for the duration of the UWB clock signal, their temporal positions are recorded, these time positions are compared with their temporal positions in the recorded copy of the UWB clock signal and the results of comparing the energy values the samples in the previous and subsequent time windows of the stack carry out their weight processing, as a result of which the magnitude and sign of the time delay are determined, the introduction of which into the signal time channels (ICS) of the stack will lead to the capture of the synchronism state; on this, the process of establishing synchronism between the transmitting and receiving devices of the radio link is considered complete and from this moment the process of receiving UWB information signals begins in one of the ICS stack, while the time from the moment the UWB reference pulse is detected until the start of receiving UWB information signals is about ( N + 1) T _cf.

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