RU2731126C1 - Apparatus for distinguishing short-pulse ultra-wideband signals of high efficiency - Google Patents

Abstract

FIELD: radio equipment.

SUBSTANCE: invention relates to a device for distinguishing short-pulse ultra-wideband signals of high efficiency. Device includes a processing and control unit (6) which includes analogue-to-digital and digital-to-analogue conversion functions. Device provides a process for weight processing of pulse sequences of information UWB signals received from a radio channel and mixed with channel noise, by continuous evaluation of pulsed energy values averaged across all pulses of information signals in three time-shifted current receiving time windows of corresponding time channels over the duration of said windows: in current "advanced" time window, in current "signal" time window and in current "delayed" time window.

EFFECT: enabling increase in probability-time characteristics of systems and apparatus using the UWB signals owing to reliable retention of the synchronism state between receiving and transmitting parts of radio lines of both stationary and mobile high-speed information transmission systems, multi-user systems and other radioelectronic systems and facilities in the process of radio exchange, as well as by using a dynamic energy threshold, the introduction of which partially compensates for the negative effect of external interference factors.

1 cl, 10 dwg

Description

The invention relates to the field of radio engineering and can be used in the development of receiving devices that provide an increase in the efficiency of detection and discrimination of information UWB signals, both stationary and mobile high-speed information transmission systems, multi-user systems and other radio electronic systems, and means practicing radio exchange with short-pulse ultra-wideband (UWB ) signals.

Various proposals are known that characterize the fulfillment of specific requirements for the implementation of devices that process information UWB signals on the receiving side. For example, in [1], a transceiver module for radio exchange of coded visual and audio messages is presented, using for this ultra-wideband signals formed by code sequences of the same length, containing ten logical units, spaced from each other by a different number of samples. Code sequences, modulating information zeros and information units are the same in content, but differ in the pulse spacing period. In this case, the pulses are filled with high-frequency oscillations, that is, UWB signals are sent to the communication channel, which are streams of radio pulses of different duty cycle for information zeros and information units. In the receiving mode, amplitude detection of radio pulses is carried out, at which they are limited from below at the zero level. Next, the envelopes of limited radio pulses are separated and the resulting video pulses are amplified, which are fed to the input of the comparator in order to obtain normalized rectangular pulses, which, after the passage of the RS-trigger, are aligned in duration and become suitable for processing in the interface. At one of the outputs of the synchronizer, a digital sequence is formed with the value of the time shift found at the moment of locking the synchronism state, which provides the maximum value of the output signal at the corresponding output of the processing circuit.

The disadvantages of the known device include the following. Restricting radio pulses from below will be characterized by corresponding energy losses. Different duty cycle of UWB signals leads to more stringent requirements to ensure the stability of the current state of synchronization. In addition, the declared qualities are provided by a sufficiently large complication of the UWB signal processing algorithm. At the same time, in the receiving device of this transceiver module, there is no adaptation of the detection threshold to a change in the interference environment, which will reduce the reliability of the processing results.

The patent [2] proposes a device that receives UWB signals in digital form using two parallel time channels. One time channel is used to receive a signal, the second is to assess the level of external noise. Sensitive threshold devices form the basis of each time channel. Reception in the signal and noise time channels is carried out in the corresponding time intervals (windows) formed by the corresponding shapers. Detection of a UWB signal pulse is carried out in the current time window of the signal time channel. Moreover, the duration of the time window is not much longer than the duration of the pulse itself, which allows for increased noise immunity. The processed UWB signal from the outputs of the threshold devices enters the digital signal processor (DSP), in which the levels of the incoming UWB signal and channel noise are analyzed, a decision is made on the received information symbol, and the microcontroller adjusts the threshold voltage supplied to the inputs of the threshold devices of the signal and noise time channels ... To carry out automatic adjustment of the threshold voltage, the probability of error per bit of the received UWB signal is estimated and, depending on the results, the sensitivity of the receiver is adjusted by adjusting the thresholds.

The inherent disadvantages of this device include the need to use powerful computing facilities such as DSPs, which tend to consume a lot of energy. In addition, the choice of the threshold for detecting UWB signals pulses is carried out by processing the channel noise in the time windows of the noise time channel. Consequently, the level of the detection threshold of UWB signals pulses in the signal time channel is here adapted to the noise level, but only to the extent that it exceeds the noise threshold in the threshold device of the noise time channel, which reduces the device's sensitivity to changes in the interference environment.

The closest in technical essence to the proposed is the receiving part of the transceiver module [3], taken as a prototype.

A block diagram of the prototype device is shown in FIG. 1, where it is indicated:

1.1 -1.5 - from the first to the fifth controlled time window generators (UVVO);

2.1 - 2.5 - from the first to the fifth pulse energy storage units (IEN);

3.1 - 3.5 - from the first to the fifth threshold devices (PU);

4.1 - 4.5 - from the first to the fifth threshold shapers (FP);

6 - processing and control unit (BOU);

7.1 - 7.5 - from the first to the fifth accumulators of channel pulse energies (NKEI);

8 - controlled clock pulse generator (UGTI);

9 - analog-to-digital converter (ADC).

The prototype device contains five identically organized signal time channels (SVC) (the dotted rectangle denotes the SVC, which is shown in each branch of the circuit). Each of the five ICS consists of the corresponding series-connected UHVO 1.1 - 1.5, IEN 2.1 - 2.5, NKESI 7.1 - 7.5. and PU 3.1 - 3.5, the second input of each of which is connected to the output of the corresponding FP 4.1 - 4.5. In this case, the first inputs of the UVBO 1.1-1.5 are combined and are the input of the device connected to the antenna switch (not indicated in Fig. 1). The second inputs of each of the five UHVO 1.1 - 1.5 are connected to the corresponding outputs of the UGTI 8 and the second inputs of the corresponding IEN 2.1 - 2.5 and NKESI 7.1 - 7.5. The outputs of the PU 3.1 - 3.5 are connected to the corresponding inputs of the ADC 13, the output of which is connected to the input of the BOU 6, the first output of which is connected to the inputs of the FP 4.1 - 4.5. The second output of the BOU 6 is connected to the input of the UGTI 8. The third output of the BOU 10 is the output of the device.

The prototype device works as follows. After detecting the UWB sync signal and capturing the synchronism state, the last two UWB signals are used to receive and distinguish information UWB signals, and the first three (left, center and right) maintain the synchronism state. In this case, a mixture of pulses of an information UWB signal and channel noise or one channel noise from the output of the antenna switch is fed to the first inputs of UVBO 1.4 or UVBO 1.5. At the same time, clock pulses with the determined delay arrive at their second inputs, the second inputs of IEN 2.4 and IEN 2.5 and the second inputs of NKEI 7.4 and NKEI 7.5 from the corresponding outputs of the UGTI 8 to form the current time windows UVVO 1.4 and UVVO 1.5 and timing the time intervals during which accumulation of a mixture of energies of UWB signal pulses and channel noise or one channel noise is carried out in NKEI 7.4 and NKEI 7.5. The pulse energy accumulated in NKEI 7.4 or NKEI 7.5 for the duration of the UWB signal is fed to the inputs of the PU 3.4 and PU 3.5, respectively, from the output of which, respectively, the above-threshold energy accumulated in the channel energy storage units or a mixture of UWB pulses are fed to the 4th and 5th inputs of ADC 9 signal with channel noise, or one channel noise. In ADC 9, the overthreshold energy is digitized and the digital readout from the output of ADC 9 is fed to the input of the ACU 6, where, depending on whether the digital threshold of the energy accumulated on the duration of the UWB signal was exceeded in the 4th or 5th ICS, a decision will be made about which of the information symbols was received - zero or one. Simultaneously, similar procedures are carried out in the first three ICS. In this case, if the energy of the digital threshold accumulated over the duration of the UWB signal, digitized in the ADC 9, exceeds the digital threshold in the central ICS and in any one of the other two ICCs that make up the time discriminator, based on the ratio of the above-threshold energies, the value and sign of the time shift of the generated signal time windows, which is used to adjust the frequency and phase of the UGTI 8 in order to compensate for this shift. Thus, at each time interval equal to the duration of the UWB signal, the tracking of the delay value is carried out, which maximizes the energy samples.

Several factors can be attributed to the main disadvantages of the prototype device. The first is technical redundancy. In principle, the reception of information UWB signals and tracking the delay in order to maintain the synchronism state can be implemented using not five, but three ICSs due to a slight complication of the processing algorithm, which is quite simple to implement with a modern computing base. The second disadvantage is the underestimated sensitivity of the algorithm for finding the estimate of the time shift due to the fact that the above-threshold UWB signal energies accumulated in the central and some other UWB signal over the duration of the entire UWB signal are used as its parameters. That is, the time shift can only be estimated when both of the mentioned energies exceed the digital threshold, and before that the time shift cannot be detected. Finally, as a third disadvantage, it is possible to present the fact that the dynamic energy detection threshold is not used, which makes it possible to compensate to some extent for the negative influence of changes in external interference factors.

The task of the proposed device is to simplify the circuitry implementation of the device, increase the sensitivity of the algorithm for finding the estimate of the time shift, and also improve the noise immunity when distinguishing between short-pulse UWB signals of increased efficiency.

To solve the set problem, a device for discriminating short-pulse ultra-wideband signals of increased efficiency, containing three controlled time window shapers (UVVO), whose outputs are connected to the first inputs of three pulse energy storage devices (IES), respectively, as well as three threshold devices, the second inputs of which are connected to outputs of three corresponding threshold shapers, the inputs of which are combined and connected to one of the outputs of the processing and control unit (PCU), the output of which is the output / input of the device, while the outputs of the first, second and third IEN are connected respectively to the second, third and fourth inputs of the PCU ; the first inputs of the UVBO are combined and are the input of the device, the second inputs of the UVBO are connected to the second inputs of the corresponding IES, according to the invention, a synchronization unit is introduced, three outputs of which are connected to the second inputs of the UVBO, respectively, the fourth output of the synchronization unit is connected to the input of the BOU, the outputs of which from the first to the third is connected to the third inputs of the third, second and first IEN, respectively, the outputs of the BOU from the fourth to the sixth are connected, respectively, to the third inputs of the UFVO; the seventh output of the ACU is connected to the input of the synchronization unit; IEN outputs are connected respectively to the second, third and fourth inputs of the RCD, the fifth, sixth and seventh inputs of which are connected to the outputs of the third, second and first threshold devices, respectively, and the device output is an output / input.

FIG. 2 shows a block diagram of the proposed device, where it is indicated:

1.1 - 1.3 - from the first to the third controlled time window shapers (UVVO);

2.1 - 2.3 - from the first to the third pulse energy storage units (IEN);

3.1 - 3.3 - from the first to the third threshold devices (CP);

4.1 - 4.3 - from the first to the third FP threshold shapers;

5 - synchronization unit (BS);

6 - processing and control unit (BOU).

The proposed device contains three identically organized signal time channels (SVC) (the dotted rectangle indicates the SVC, which is shown in each branch of the circuit). Each of the three ICS consists of the corresponding series-connected UHVO 1.1 - 1.3, IEN 2.1 - 2.3 and PU 3.1 - 3.3, the second input of each of which is connected to the output of the corresponding FP 4.1 - 4.3. In this case, the first inputs of the UVVO 1.1 - 1.3 are combined and are the input of the device. The second inputs of each of the three UVVO 1.1 - 1.3 are connected to the corresponding outputs of the synchronization unit 5 and the second inputs of the corresponding IEN 2.1 - 2.3, the outputs of which are connected, respectively, to the second, third and fourth inputs of the ACU 6. The outputs of the PU 3.1 - 3.3 are connected to the seventh, sixth and the fifth inputs of the BOU 6, respectively. The third inputs of IEN 2.1 - 2.3 are connected respectively to the first, second and third outputs of the BOU 6. The third inputs of the UFO 1.1 - 1.3 are connected, respectively, to the fourth, fifth and sixth outputs of the BOU 6, the input of which is connected to the fourth output of the synchronization unit 5, the seventh output of which is connected with the input of the synchronization block 5. The input / output of the BOU 6 is the output / input of the device.

The processing and control unit 6 of the proposed device differs from the BOU 6 of the prototype device in an extended list of functions performed, including the functions of analog-to-digital and digital-to-analog converters.

и

для обнаружения в них импульсов соответственно прямого и инверсного информационных СШП сигналов на приёмной стороне, где моменты начала формирования этих текущих временных окон также задаются с помощью «разреженного» кода Неймана-Хоффмана: чёрные прямоугольники соответствуют текущим временным позициям «сигнальных» временных окон для обнаружения в них импульсов прямого СШП сигнала, а серые прямоугольники - текущим временным позициям «сигнальных» временных окон для обнаружения в них импульсов инверсного СШП сигнала. Таким образом, различение информационных символов на приёмной стороне соответствует совпадению временных позиций достаточного количества отсчётов, полученных оцифровкой обнаруженных и накопленных за время существования, текущего «сигнального» временного окна импульсных энергий, с временными позициями соответствующих элементов копии «разреженного» кода Неймана-Хоффмана, хранящейся в регистре. Очевидно, что в радиоканале оба СШП сигнала – прямой и инверсный не могут присутствовать одновременно, поэтому в процессе обработки импульсов прямого СШП сигнала в ткущем «сигнальном» временном окне те его временные позиции, которые соответствуют временным позициям импульсов инверсного СШП сигнала используются в качестве временных позиций «шумовых» временных окон и наоборот, то есть в процессе обработки импульсов инверсного СШП сигнала в ткущем «сигнальном» временном окне те его временные позиции, которые соответствуют временным позициям импульсов прямого СШП сигнала используются в качестве временных позиций «шумовых» временных окон.It should be borne in mind that the claimed device uses pulse-code modulation (CPM), in which UWB signals carrying information units and zeros are formed as follows. A certain code is selected (here the 24-element Neumann-Hoffman code is the most balanced), the pauses between the pulses of this code are proportional to the numbers of the pseudo-random number sequence, which has the same number of elements as the selected code. For a UWB signal carrying an information unit (hereinafter referred to as a direct UWB signal), positions corresponding to units of the Neumann-Hoffman code are selected as the time positions of the pulses, and for a UWB signal carrying an information zero (hereinafter inverse UWB signal), positions are selected as time positions corresponding to zeros of the Neumann-Hoffman code. FIG. 3a) shows the "sparse" Neumann-Hoffman code NH (t), on the basis of which direct and inverse UWB signals are formed, where black filled circles correspond to the time positions of pulses of the direct UWB signal, and empty squares - to the time positions of pulses of the inverse UWB signal. FIG. 3b) the current time positions of the "signal" time windows are presented as a function of time

and

to detect in them pulses, respectively, of direct and inverse information UWB signals on the receiving side, where the moments of the beginning of the formation of these current time windows are also set using the "sparse" Neumann-Hoffman code: black rectangles correspond to the current time positions of the "signal" time windows for detection in them are pulses of the direct UWB signal, and the gray rectangles are the current time positions of the "signal" time windows for detecting in them pulses of an inverse UWB signal. Thus, the discrimination of information symbols on the receiving side corresponds to the coincidence of the time positions of a sufficient number of samples obtained by digitizing the detected and accumulated during the existence of the current "signal" time window of impulse energies, with the time positions of the corresponding elements of the copy of the "rarefied" Neumann-Hoffman code stored in the register. Obviously, in a radio channel both UWB signals - direct and inverse UWB signals cannot be present at the same time, therefore, in the process of processing the pulses of the direct UWB signal in the current "signal" time window, those time positions that correspond to the time positions of the pulses of the inverse UWB signal are used as time positions “Noise” time windows and vice versa, that is, during processing of pulses of an inverse UWB signal in the current “signal” time window, those time positions that correspond to the time positions of pulses of the direct UWB signal are used as time positions of “noise” time windows.

The claimed device operates as follows. After the detection of the UWB sync signal, the capture of the synchronism state and the introduction of the reference energy threshold P ₀ into the CP 1.1 - 1.3, the SVC is used, in which the UWB 1.2 forms the current "signal" (index sig) time window for receiving and distinguishing information UWB signals, the moments of the beginning of the formation of which are determined by the time positions of the "sparse" Neumann-Hoffman code. To maintain the synchronism state, two other VCS are used, while in one of these VCS UFO 1.1 forms the current "leading" (adv index) time window, and in the other, the UHC UFO 1.3 forms the current "lagging" (ret index) time window. The current time windows of neighboring ICS are shifted relative to each other by the duration of the time window 2τ ₀ (τ ₀ is the pulse duration of the UWB signal), therefore they simultaneously form a time discriminator. FIG. 4a), conventionally, in the form of rectangles of dark gray, black and light gray colors, respectively, the current time positions of these time windows are presented in their time channels for processing pulses of direct and inverse UWB signals. FIG. 4b), for greater clarity, an enlarged fragment is presented containing only three corresponding time windows for processing the direct UWB signal.

In this case, the mixture of pulses of the information UWB signal and channel noise from the output of the preprocessing unit is fed to the first inputs of the UWBO 1.1 - 1.3. At the same time, timing pulses are sent to their second inputs and the second inputs of IEN 2.1 - 2.3 from the corresponding outputs of BS 5, and to their third inputs and third inputs of IEN 2.1 - 2.3 commands are received from the corresponding outputs of the IEN 6, which determine the moments of the beginning of the formation of the current "signal", "Leading" and "lagging" time windows, as well as the moments of the beginning of the accumulation of energies arriving at the first inputs of IEN 2.1 - 2.3 of the mixture of UWB signal pulses and channel noise, taking into account the time delay found in the process of locking. Further, the impulse energies accumulated in the IEN 2.1 - 2.3, obtained both on the duration of the current time windows corresponding to the pulses of the incoming UWB signal, and on the duration of the current time windows corresponding to its inversion, from the outputs of the IEN 2.1 - 2.3 are fed to the corresponding inputs of the BOU 6, where they are digitized, turning into energy samples, and on their basis the current values of the impulse energy signal-to-noise ratio for pulses of the direct UWB signal are calculated

(1)

(1)

or for pulses of inverse UWB signal

. (2)

... (2)

,

-соответственно энергии смеси прямого и инверсного СШП сигналов с канальным шумом. Таким образом, при обработке прямого СШП сигнала в отсутствии инверсного СШП сигнала во временных окнах, соответствующих временным позициям импульсов инверсного СШП сигнала будет накапливаться только энергия канального шума. Это относится и к случаю обработки инверсного СШП сигнала.Here, neglecting the mutual pulse energy of the UWB signal and channel noise

,

- respectively, the energy of a mixture of direct and inverse UWB signals with channel noise. Thus, when processing a forward UWB signal in the absence of an inverse UWB signal, only the channel noise energy will accumulate in the time windows corresponding to the time positions of the pulses of the inverse UWB signal. This also applies to the case of processing an inverse UWB signal.

или

, с использованием которых оценивается значение текущего динамического энергетического порога П_д,i , который поступит на вторые входы ПУ 3.1 - 3.3 перед обработкой следующего СШП сигнала. Здесь i – номер текущего СШП сигнала.Next, averaging is carried out over the number of detected impulse energies of the current impulse energy signal-to-noise ratio (1) or (2), that is, obtaining the values

or

, using which the value of the current dynamic energy threshold P _{d, i} is estimated, which will arrive at the second inputs of the PU 3.1 - 3.3 before processing the next UWB signal. Here i is the number of the current UWB signal.

с соответствующими нижними индексами: adv, sig или ret) поступают на соответствующие входы БОУ 6, где они оцифровываются, оценивается количество полученных отсчётов (

или

с соответствующими индексами), фиксируются их временные позиции. Если количество оцифрованных энергетических отсчётов, полученных обработкой на длительности текущего «сигнального» временного окна превышает заданный цифровой порог, то далее на основе этих отсчётов, а также аналогичных отсчётов с их временными позициями, но полученных обработкой либо на длительности текущего «опережающего» временного окна, либо на длительности текущего «запаздывающего» временного окна, в соответствии с заданным алгоритмом осуществляется оценка текущего временного смещения «сигнального» временного окна δt_i, являющаяся причиной снижения импульсной энергии, накапливаемой на длительности текущего «сигнального» временного окна. Далее это временное смещение перед обработкой следующего СШП сигнала поступает на третьи входы УФВО 1.1 - 1.3 и ИЭН 2.1 - 2.3, корректируя моменты начала формирования текущих временных окон и моменты начала накопления импульсных энергий таким образом, что импульсные энергии, накапливаемые на длительности текущего «сигнального» временного окна оптимизируются, а импульсные энергии, накапливаемые на длительности «опережающего» и «запаздывающего» временных окон минимизируются. В обозначениях соответствующих величин будет присутствовать верхний индекс: min или opt.At the same time, the pulse energy accumulated in IEN 2.1 - 2.3 from their outputs is fed to the corresponding inputs of PU 3.1 - 3.3, from the output of which the above-threshold parts of these energies (

with the corresponding subscripts: adv, sig or ret) are fed to the corresponding inputs of the BOU 6, where they are digitized, the number of received samples is estimated (

or

with the corresponding indices), their temporary positions are fixed. If the number of digitized energy samples obtained by processing for the duration of the current "signal" time window exceeds the specified digital threshold, then on the basis of these samples, as well as similar samples with their time positions, but obtained by processing or on the duration of the current "advanced" time window, or on the duration of the current "lagging" time window, in accordance with the given algorithm, the current time shift of the "signal" time window δt _i is estimated, which is the reason for the decrease in the impulse energy accumulated over the duration of the current "signal" time window. Further, this time shift, before processing the next UWB signal, is fed to the third inputs of UVBO 1.1 - 1.3 and IEN 2.1 - 2.3, correcting the moments of the beginning of the formation of current time windows and the moments of the beginning of the accumulation of impulse energies in such a way that the impulse energies accumulated over the duration of the current "signal" time windows are optimized, and impulse energies accumulated over the duration of the "leading" and "lagging" time windows are minimized. The designations of the corresponding quantities will contain a superscript: min or opt.

If the above digital threshold is not exceeded by the sum of the digitized energy samples obtained by processing for the duration of the current "signal" time window, then the current UWB signal will be skipped.

FIG. 5 - 10 presents the results of mathematical simulation of the process of functioning of the proposed device. Thus, in FIG. 5a) and Fig. 5c) as an illustration, the values of energy samples, accumulated impulse energies of a mixture of direct (Fig.5a) and inverse (Fig.5c) UWB signals with channel noise at their time positions are presented. There is also given the reference energy threshold P ₀ , which is depicted by a bold horizontal dashed line in dark gray color. The black filled circles indicate the energy counts accumulated in the current "signal" time window, black empty squares - the energy counts accumulated in the current "leading" time window, black filled squares - the energy counts accumulated in the current "lagging" time window. 5b) and FIG. 5d) shows the above-threshold parts of these energy readings. Here, dark gray filled rhombuses represent the time positions of the copies of the "sparse" Neumann-Hoffman code stored for comparison. The image shown in FIG. 6 serves as an explanation to FIG. 5, as it illustrates the enlarged scale of the situation before the accumulation of current energy (curves of dark gray color) of direct (Fig. 6a) and inverse (Fig. 6b) UWB signals in the current "signal" time window (black rectangles). From an analysis of FIG. 6, it follows that all current time windows begin to lag behind the moment of acquisition of synchronism; therefore, the current energy of the mixture of UWB signals with channel noise begins to be redistributed between the current "leading" (dark gray rectangles) and the current "signal" time windows. It is for this reason that FIG. 5b) and Fig. 5d) the value of energy counts characterizing the above-threshold parts of impulse energies accumulated in the current "advanced" time window is so large, and the spread of energy counts characterizing the above-threshold parts of impulse energies accumulated in the current "signal" time window is so significant.

FIG. 7 as confirmation of the analysis of FIG. 5 and FIG. 6 shows the dynamics of the accumulation of the number of digitized samples. Moreover, in FIG. 7b) black and gray rectangles conventionally represent the time positions of the current "signal" time window for processing direct (black) and inverse (dark gray) UWB signals. Here

Analysis of FIG. 7a) and 7b) shows that the outwardly digital form of estimating the maximum of the autocorrelation function (the total sum of the digitized samples) is, as it were, insensitive to the shift of time windows, since the one shown in Fig. 7a) is indistinguishable from that shown in FIG. 7b). However, these images cannot be viewed separately from FIG. 5b) and Fig. 5d), since the unit samples dynamically accumulated and shown in Fig. 7a) are characterized by much lower physical energetics than similar readings shown in Fig. 7b). This means that the real probability of correct detection of UWB signals whose pulses are processed for the duration of the current "signal" time window is much higher than the same, but conditional (illustrative) probability, if the accumulation of digitized samples were carried out over the duration of the current "advanced" time window.

.The illustrative material shown in FIG. 8 - 10, characterizes the same features of processing UWB signals on the receiving side as in Fig. 5 - 7, but in the case of using the current value of the dynamic energy threshold P _{d, i} and the current estimate of the time shift δt _i . Moreover, for the illustrations presented in FIG. 8 - 10,

...

The analysis shown in FIG. 8-10 and comparing it with that shown in FIG. 5-7 shows that using the current estimate of the time offset for its intended purpose sets the pulses of the forward and inverse UWB signals to the center of the current "signal" time window with high accuracy, and the introduction of the current dynamic energy threshold (shown in Fig. 8a) and FIG. 8c) with a black bold dashed horizontal line) takes into account the increased energy of the counts characterizing the accumulation of impulse energy over the duration of the current "signal" time window, which entails the following:

- increase of the pulse energy accumulated on the duration of the current "signal" time window up to maximum values;

- decrease in the spread of the values of energy readings, characterizing the above-threshold parts of the pulse energies accumulated over the duration of the current "signal" time window, to the minimum values;

- zeroing of possible residual noise energy samples in the current "leading" and "lagging" time windows.

From the material presented above, it follows that the proposed device provides the declared qualities.

The implementation of the claimed device should not cause difficulties, since the functional units included in the units of the device are well known, widely used in domestic and foreign patents, and are also described in the technical literature. For example, blocks similar in purpose to those proposed in the claimed invention are known from [3,4].

Sources of information

1. Patent 157935 (RF). Transceiver module for data exchange using ultra-wideband signals. IPC Н04В 1/38, H04L 9/00 / Zaitsev A.V., Mitrofanov D.G., Timofeev I.A., Krasavtsev O.O., Kichulkin D.A., Tereshchenko A.A., Azarov V. S., Chernikov A.K., Chizhov A.A. Application No. 2014147229/08 dated November 24, 2014. Publ. 20.12.2015

2. Patent 2315424 (RF). Communication system with high speed data transmission by ultra-wideband signals. IPC Н04B 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. 20.01.2008

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

4. Patent 2354048 (RF). Method and system of communication with fast acquisition of synchronism by ultra-wideband signals. IPC Н04B 7/00 / Kyshtymov G.A., Bondarenko V.V., Kyshtymov S.G. Application No. 2007144256/09 dated 28.11.2007. Publ. April 27, 2009

Claims (2)

1. A device for discriminating short-pulse ultra-wideband signals of increased efficiency, containing three controllable time window shapers (UVVO), the outputs of which are connected to the first inputs of three pulse energy storage devices (IES), respectively, as well as three threshold devices, the second inputs of which are connected to the outputs of three corresponding threshold shapers, the inputs of which are combined and connected to one of the outputs of the processing and control unit (PCU), the output of which is the output / input of the device, while the outputs of the first, second and third IEN are connected respectively to the second, third and fourth inputs of the PCU; the first inputs of the UVBO are combined and are the input of the device, the second inputs of the UVBO are connected to the second inputs of the corresponding IES, characterized in that a synchronization block is introduced, three outputs of which are connected to the second inputs of the UVBO, respectively, the fourth output of the synchronization block is connected to the input of the BOU, the outputs of which are from the first on the third are connected to the third inputs of the third, second and first IEN, respectively, the outputs of the BOU from the fourth to the sixth are connected, respectively, to the third inputs of the UFO; the seventh output of the ACU is connected to the input of the synchronization unit; IEN outputs are connected respectively to the second, third and fourth inputs of the RCD, the fifth, sixth and seventh inputs of which are connected to the outputs of the third, second and first threshold devices, respectively, and the device output is an output / input. 2. The device according to claim 1, characterized in that the processing and control unit is configured to perform the functions of analog-to-digital and digital-to-analog conversion.

Images