Method and device diagnostic equipment digital transmission systems

 

(57) Abstract:

The proposed technical solutions combined to form a single inventive concept and relate to the field of radio engineering, in particular to the field of diagnostics of technical condition of equipment for digital transmission systems and, in particular, can be used in determining the technical condition of the equipment of digital transmission systems with detection and localization of different detectors. The aim of the invention the claimed technical solution is to develop a method and device diagnostic equipment digital transmission systems, designed to detect failures, single and multiple failures of equipment for digital transmission systems. This objective is achieved in that a method for diagnosing equipment digital transmission systems provides an additional allocation of the transmitted pseudo-random sequence at the outputs of the controlled blocks of the diagnosed equipment digital transmission systems, the calculation of its statistical characteristics and on the basis of these characteristics the definition of the truncation parameters, which allow the required accuracy and reliability to identify the technical condition of the equipment digital sikim plan and relate to the field of radio, namely, the field of diagnostics of technical condition of equipment for digital transmission systems and, in particular, can be used in determining the technical condition of the equipment of digital transmission systems with detection and localization of various defects.

Interpretation of terms used in the application: - the failure - event consisting in the violation of the operating state of the object (GOST 27.002-89. Reliability in engineering. The basic concepts. Terms and definitions.); fail - clostridiosis failure or acute failure, fixed minor intervention (GOST 27.002 - 89); interspersed failure - occur repeatedly clostridiosis the failure of one and the same character (GOST 27.002 - 89); lattice distribution - value, has a lattice distribution if it is discrete and all of its possible values have the form a+kh, k = 0, 1,.. . . The value of h is called the step distribution Reference book on probability theory and mathematical statistics / C. S. Korolyuk. N. And.Portenko, A. C. Skorokhod, A. F. Turbines. - M.: Nauka. The main edition of physico-mathematical literature, 1985. - pages 20-21).

Known methods of diagnosis described, for example, in the book: automated diagnosis e-the surrounding formation test sequence, its transformation according to the law, storing the converted sequence and its comparison with the previously calculated. The difference in the converted and calculated sequence indicates the refusal or failure. However, the known methods analogs do not allow to detect alternating single and multiple failures (failures).

The known device diagnostics - see the invention of the Device for controlling the operability of the radio" (51) 4 H 04 17/00, published 22.02.90. , issue No. 134; the invention of "Automated control system" (51)5 H 04 17/00 // H 04 3/46 published 30.06.94., Bulletin No. 12. They contain device generating test sequences, the comparator test sequence error counter. These devices allow you to diagnose transmission system according to the error rate.

The General lack of analogues is the low reliability of diagnostic equipment digital transmission systems, the impossibility of detection of intermittent single and multiple failures (crashes), the inability to obtain the required accuracy in real time.

The closest to the technical nature of the claimed TBE diagnostic equipment digital transmission systems copyright certificate of the USSR N 1734219, declared 6.08.90 published 15.05.92, Bulletin No. 18. Prototype method consists in the formation of pseudo-random test sequence duration 158400 clock pulses and applying it to the input of the transmitting tract, converting it according to the algorithm of signal conversion, subsequent loosening and mixing with signal noise, switching the input of the receiving channel, the reverse transformation, the selection is transmitted pseudo-random sequence at the output of the reception path, its comparison with the original test by counting distorted pulses. At a predetermined algorithm, in excess of the permissible value of the distorted pulses N > NSSwhere N is the number of distorted pulses, NSSallowable number of distorted pulses, re-transmission pseudo-random test sequence, this may introduce new and / or excluded previously set conversion pseudo-random sequence depending on the ratio between N and NSSuntil then, until it is determined unit defective equipment digital transmission systems. However, the prototype method has drawbacks, namely the lack of opportunities identificireba (prototype) in its technical essence is the device diagnostic equipment digital transmission systems copyright certificate of the USSR N 1734219, declared 6.08.90 published 15.05.92, Bulletin No. 18. The device prototype consists of transmitting and receiving channels of the diagnosed equipment digital transmission systems, each of which includes blocks conversion of signals, such as the encoder of the transmitting path, the modulator of the transmitting tract, the frequency Converter of the transmitting tract, the power amplifier of the transmitting tract, block input circuits and amplifier of high frequency reception path, a frequency Converter receiving channel, the demodulator receiving channel, the decoder receiving channel, a pseudorandom sequence generator, the delay line block check error, block error count, the switching unit connections, block control signals, noise generator, attenuator.

Thus the pseudo-random sequence generator connected to the first input of the delay line and the second input of the switching unit connections, the first output and the fourth input is connected to the corresponding input and output of the transmission path, the third output unit switching connection is connected to the input of the attenuator, the output of which the output of the noise generator connected to the first input of the switching unit connections, the fourth output, and t is their signals are connected to the group of inputs of the switching unit connections the second output of which is connected to the second input of block registration errors, the output of which is connected to the input of block error count, the output of the delay line is connected to the third input of the block check error.

This allows, in comparison with devices analogues significantly reduce the time and increase the accuracy assessment of the diagnosed equipment digital transmission systems by using the mechanism of "strengthening" the number of incorrectly received pulses.

However, the device is a prototype has disadvantages: does not allow to identify multiple failures, as the assessment of the diagnosed equipment digital transmission systems is only one parameter, the error rate, which does not carry information about the nature and frequency of failure, but indicates only the presence of faults, which, in turn, increases the time localization of the faulty (defective) element (elements); the relatively low reliability due to the need to introduce between the respective blocks of the signal transmitting and receiving channels of the diagnosed equipment controlled electronic keys.

The aim of the invention sistem transmission and device it implements detecting single and multiple failures of equipment for digital transmission systems.

This objective is achieved in that in the known method of diagnosing the condition of the equipment digital transmission systems, which consists in forming a pseudo-random sequence, applying it to the input of the transmitting tract, converting it according to the algorithm of signal conversion, subsequent loosening and mixing it with the signal noise, switching the input of the receiving channel, the reverse transformation, highlighting the recovered pseudo-random sequence, additional signals are pseudo-random sequence Fi(t) is recovered after each i-th transformation. Where Fi(t) - selected pseudo-random sequence after the first conversion, i = 1, 2, 3, ...R, R is the number of conversions pseudo-random sequence according to the transformation algorithm. Then for each i-th transformation compute the mathematical expectation of the number of individual symbols m(1)i, the variance of the number of occurrence of individual symbols d(1)iand the probability of occurrence of a single symbol p(1)iby formulas

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This objective is achieved in that in the known device diagnostic equipment digital transmission systems containing transmitting and receiving paths of the diagnosed equipment digital transmission systems, which include blocks conversion of the signals, the control unit, the pseudo-random sequence generator, attenuator and noise generator, the output of which is connected to the output of the attenuator, introduced additional units of analysis, memory, comparison, and display the status. The output of a pseudorandom sequence generator connected to the input of the transmitting tract of the diagnosed equipment digital transmission systems. The output of the transmitting tract of the diagnosed equipment digital transmission systems connected to the input of the attenuator. The output of the attenuator is connected to the input of the reception path of the diagnosed equipment digital transmission systems. The outputs of blocks conversion of the signal transmitting and receiving channels of the diagnosed equipment digital transmission systems connected to the i-th information input unit of analysis, where i= 1, 2, 3, ....R, R is the number of controlled units conversion signals of the diagnosed equipment digital transmission systems. To the information input of the memory block output is connected to the information input block parameter definitions, compare and display the status. Moreover, the control inputs of a pseudorandom sequence generator, units of analysis, characterization, memory, comparison, and display the status of connected to the corresponding outputs of the control unit.

Conducted by the applicant's analysis of the level of technology has allowed to establish that the analogs are characterized by the sets of characteristics is identical for all features of the claimed method and device diagnostic equipment digital transmission systems, no. Therefore, each of the claimed invention meets the condition of patentability "Novelty."

Search results known solutions in this and related areas of technology in order to identify characteristics that match the distinctive features of prototypes signs of each of the claimed invention, have shown that they do not follow explicitly from the prior art. Of certain of applicant's prior art there have been no known impact provided the essential features of each of the claimed inventions to the achievement of the technical result. Therefore, each of the claimed invention meets the condition of patentability "Inventor who established levels of pseudo-random sequence; in Fig. 2 is a state table for temporary positions in the Z-bit segments adopted a pseudo-random sequence and in good condition diagnosed equipment digital transmission systems; b, C, d is in a failed state the diagnosed equipment digital transmission systems; Fig. 3 is a structural diagram of the device diagnostics of technical condition of equipment of digital transmission systems; Fig. 4 is a structural block circuit analysis; Fig. 5 is a structural block circuit diagram of the determination of parameters of Fig. 6 is a structural block circuit diagram of the comparison; Fig. 7 is a structural diagram of the electronic switch of Fig. 8 - the algorithm of the control unit of Fig. 9 - the results of the calculation of the required values z

The implementation of the inventive method consists in the following. For different types of diagnostics can be applied scheme of independent trials on the basis of truncated binomial distributions, the distribution function which has the form

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where p () is the probability of occurrence of single characters in any category at the equipment output digital transmission systems, a space of elementary events with a capacity of Z representing the bit width of the output digital sequence unit and the border of the signals at the output of equipment for digital transmission systems in the Z-bit sequences with N trials; when 0 < 1;

Y - the minimum number of unit symbols on the equipment output digital transmission systems in the Z-bit sequences with N trials;

]*[ - "Antje", the greatest integer.

Under the truncated binomial distribution refers to the distribution of the probability of occurrence of random variables when the limit on the number of occurrences of the random variable (for example, a ban on the appearance of a long series of single and zero characters) in a number of independent trials. A special case of a truncated binomial distribution with the initial settings of the truncation Y= 0 and K=1 is the binomial distribution, is described, for example, in the book. : Handbook of mathematics for scientific workers and engineers). G. Korn, T. Korn. - M. : Nauka, Main editorial Board for physical and mathematical literature, 1978, page 572 - 573.

Then, as N test equipment digital transmission systems on its output arise sequence (1,2,..,zcontaining a different number of individual symbols Y () ]KZ[ in each trial, and the probability of the occurrence of () will be determined by the expression (4). To solve the problem of identification of technical condition and the distribution describing the statistical characteristics of the signals on its output. Since the random variable () is discrete, has a lattice distribution, then its mathematical expectation and variance, denoted by, respectively, M and D are formulas

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The proof of the relations (5) see, for example, in the article by A. M. Likhachev. C. E. Kuznetsov. I. A. Drozdov and other "Asymptotic approximation of a truncated binomial distribution"// Collection of scientific works of scientists of the Orel region. Issue 3. Eagle: the CMP. 1997, pages 134-138, and based on the fact that the mathematical expectation of any discrete value is defined as the sum Then its value for expression (5) takes the form

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Suppose that q( = 1-p()), n = ]KZ[-Y, j = i. Then the right-hand part of (6) takes the form

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We will produce (6) the inverse change of variables. Then

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according to the definition of (4) and expression (6) takes the form M = (]KZ[-Y)p(+Y).

In accordance with the properties of the dispersion D = M2(M)2. Then its occurrence is associated with the definition of the second initial moment (). Will replace the variables and get

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Given that by definition (4) after substitution of the variables equal to 0, the expression (8) takes the form

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Thus, Spravedlivost (5), relatively unknown truncation parameters K and Y by the method of substitution, we get the following expression:

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where M = m(1), D = d(1), p( = d(1)).

The choice of Z is determined by the required precision of the estimate of the probability of occurrence of a single symbol p(1) at each time position. Conducted research estimates show that since this probability can be calculated in the full group of events the implementation of the various vectors of binary sequences, then this value can be defined as the ratio of the number of combinations in which the signal unit of the given temporary positions to the total number of possible implementations combinations (see, for example, B. A. Sevastyanov "probability Theory and mathematical statistics. - M.: Nauka, 1982. -256 C.):

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The calculations shown in Fig. 9, show that the measurement error probability of a single symbol does not exceed 10%, Z must be at least 20.

The second component is the selection of the required number of segments N. the Value of N is selected based on the requirements of metrological measurement accuracy of the mathematical expectation and variance of the number of individual symbols in the Z-bit segments of the test posledovatelnostei required accuracy N must be at least 10.

The possibility of implementing the proposed method of diagnosing equipment digital transmission systems is explained by the following. The change in the probability of occurrence of individual symbols p(1), the truncation parameters K and Y says about the status of equipment for digital transmission systems and the nature of its changes, namely:

the magnitude of p(1) relative values of po(1) suggests the prevalence of failure, manifested in the presence of a single character, and decreasing the prevalence of failure, manifested in the presence of zero characters;

increase the Y values relative to the values of Yoevidenced by a decrease in the number of combinations from below, i.e. the occurrence of failures or disruptions, manifested in the appearance of a fixed single character;

the decrease in K values relative to the values of Koindicates the presence of combinations of fixed zero characters;

simultaneous change of the values of Y and K indicates a multiple of the refusal or failure.

In this case, the values of Y, Yo, K and Kodetermined by the formula

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where mo(1), do(1), po(1), Ko, Yo- the values of mathematical expectation, variance and probability of occurrence of a single IC the transmission systems.

For equipment digital transmission systems, implements the full set of vectors (1,2,...,z) the multiplicity of failures (i.e. the number of failed blocks) is determined by the formula

L = Y+(1-K)Z

For equipment digital transmission systems, in which operating mode has a ban on certain combinations of single and zero symbols, the frequency of failures is determined by the formula

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The essence of the proposed method is illustrated as follows.

At the entrance of the diagnosed equipment digital transmission systems served N times Z-bit segments of the pseudo-random sequence. As a pseudo-random sequence can be used specially generated signals based on the generator of pseudo-random pulses, built on recurrent delay line (described, for example, in the book. Bonev M. P. Generating random signals. Ed. 2nd Rev. and ext. M.: Energy, 1971. - 240 C.). Let us assume that the number of clock pulses in one segment Z=5 and the number of transmission segments of the pseudo-random sequence of N=32. View of the fragment of the transmitted pseudo-random test sequence shown in Fig. 1.

The generated pseudo-random sequence Fo(the W, the modulation transfer in the high-frequency gain). Then a pseudo-random sequence is attenuated by the attenuator and is mixed with the signal noise in order to "strengthen" the number of distorted pulses. After this pseudo-random sequence is input to a receive path, where is the inverse transform on a set algorithm (gain, transfer to the region of low frequencies, demodulation, decoding).

Signals are pseudo-random sequence Fi(t) is recovered after each conversion units convert the signal transmitting and receiving channels, as shown in Fig. 3. Each pseudo-random sequence Fi(t) are the Z-bit segments. Each j-m Z-bit segment of each i-th pseudorandom sequence Fi(t) calculate the number of single characters N(1)ij. The state table of the temporary positions of the Z-bit segments of the selected pseudo-random sequence Fi(t), in good condition diagnosed equipment digital transmission systems shown in Fig. 2, and.

Then by the formulas(1), (2), (3) for each i-th pseudorandom sequence Fi(t) is calculated, sootvetstvenno m(1)iothe variance of the number of occurrence of individual symbols d(1)ioand the likelihood of a single symbol p(1)ioThus have m(1)io=2.5, d(1)io=1, p(1)io=0.5.

Further, according to the formula (12) calculate the parameter values of the truncation Yioand Kiowhere Yio=0.5 and Kio=0.9.

Thus have R values for each of the i-th pseudorandom sequence Fi(t): m(1)iod(1)iop(1)io, Yioand Kiothat correspond to the parameters serviceable controlled blocks of the diagnosed equipment digital transmission systems.

When the malfunction of the i-th block of the diagnosed equipment digital transmission systems, and, as a consequence, changes its technical condition, its output can be obtained group of events, shown in Fig. 2, b. According to the above algorithm calculates the values of m(1)i= 3, d(1)i= 0.81, p(1)i= 0,6 formula (1), (2) and (3). Using the value of p(1)io= 0.5 according to the formula (13) calculate the parameter values of the truncation Yi= 1.38 and Ki= 0.93. Thus the multiplicity of failure (when Yi> Yio, Ki> Kio) is calculated by the formula (15) Li=1.

Thus, Uwe is/SUB> = 0.5 suggests that the nature of the problem will manifest itself in the appearance of either a fixed single character or intermittent failure in the form of a moving single character or appearance of periodic failure. The value of Li=1 indicates that the failure is not a multiple of.

When the malfunction of the i-th block of the diagnosed equipment digital transmission systems and, as a consequence, the change of its technical condition, its output can be obtained group of events, shown in Fig.2, century According to the above algorithm calculates the values of m(1)i= 2, d(1)i= 0.81, p(1)i= 0.4 are given by the formulas (1), (2) and (3). Using the value of p(1)io= 0.5 according to the formula (13) calculate the parameter values of the truncation Yi= 0.38 and Ki= 0.73. Thus the multiplicity of failure (when Yi< YioTOi< TOio) is calculated by the formula (15) Li=1.

Thus, the decrease in p(1)i= 0,4 relative values of p(1)io=0.5 and values TOi=0.73 relative values of Kio= 0.9 indicate that the nature of the problem will manifest itself in the appearance of either a fixed null character, or intermittent failure in the form of a trailing null character is">

When the malfunction of the i-th block of the diagnosed equipment digital transmission systems and, as a consequence, changes its technical condition, its output can be obtained group of events, shown in Fig.2, in Accordance with the above algorithm calculates the values of m(1)i= 2.5, d(1)i= 0.63, p(1)i= 0.5 in formula (1), (2) and (3). Using the value of p(1)io= 0.5 according to the formula (13) calculate the parameter values of the truncation Yi= 1.25 and Ki= 0.75, and the ratio of failure (when Yi> Yio, Ki< Kio) is calculated by the formula (15) Li=2.

Thus, increasing values of Yi= 1.25 for the value of Yio= 0.5 and reduce the value ofi= 0.75 relative values TOio= 0.9 indicate that the nature of the problem will manifest itself in the appearance or fixed unit and zero symbols, or intermittent failure in the form of a moving unit and a null character or the appearance of periodic failure. The value of Li=2 tells us that failure is a multiple of, i.e., in the i-th block of the diagnosed equipment digital transmission systems refused two elements.

Analyzing the examples, can selatcia and multiple failures to diagnose equipment digital transmission systems, in contrast to the method prototype. This is achieved by calculating the parameters of the truncated pseudo-random sequence, the modification of which is associated with changes in the technical condition of the diagnosed equipment digital transmission systems, the nature and frequency of failures.

Device diagnostics of technical condition of equipment digital transmission systems shown in Fig. 3, consists of a control unit 19, a pseudorandom sequence generator 11, the attenuator 13, the noise generator 12, the analysis block 14, block parameter definition 15, the memory block 16, block 17 comparison unit status display 18. The output of a pseudorandom sequence generator 11 connected to the input of the transmitting tract 1 of the diagnosed equipment digital transmission systems, the output of which is connected to the input of the attenuator 13, the outputs of the attenuator 13 and the noise generator 12 is connected to the input of the receive path 2 diagnostic equipment digital transmission systems, and transmitting 1 and ed 2 tracts contain blocks conversion of signals, such as the encoder 3, a modulator 4, the frequency Converter 5 and the amplifier high frequency 7, the frequency Converter 8. the demodulator 9, the decoder 10, respectively.

Outputs b the new transmission systems connected to information inputs of the analysis block 14. To the information input of the memory unit 16 is connected to the outputs of the units of analysis 14, parameter definition 15 and comparison 17. The information output of the memory unit 16 is connected to the information input block parameter definition 15, 17 comparison and unit status display 18.

Control inputs of a pseudorandom sequence generator 11, the analysis block 14, block parameter definition 15, the memory block 16, block 17 comparison and unit status display 18 connected to the corresponding outputs of the control unit 19.

The pseudo-random sequence generator 11 is designed to generate pseudo-random test sequence with known parameters Z and N. the pseudo-random sequence Generator based on recurrent delay line, known as described, for example, in the book: Bonev M. P. "the Generation of random signals. " Ed. 2nd Rev. and ext. M.: Energy, 1971, page 175 and can be implemented, for example, shift registers CIR (see C. L. awl "Popular digital circuits". -M.: Radio and communication. 1987, pp. 110 - 112, Fig. 1.78).

The noise generator 12 is designed to generate radio noise signals to provide the desired signal to see on the use of a vacuum diode, described, for example, in the book: "maintenance, reliable communications and automated systems", part 1 / L. Century the Polish, M.: Military publishing house, 1992. page 261. Fig. A. On the basis of vacuum diode, for example, type DS created a noise generator G2-32 (see "Measurements in electronics: a Handbook". C. A. Kuznetsov, V. A. Debts and others. -M.: Energoatomizdat, 1987. page 423 - 425).

The attenuator 13 is designed to reduce the power level at the input of the receiving signal path pseudorandom sequence and represents a known device described, for example, in the book: "Measurement in electronics: a Handbook". C. A. Kuznetsov, V. A. Debts and others. -M.: Energoatomizdat, 1987, pp. 353 - 355.

The analysis block 14 that is used to select the transmitted pseudo-random sequence at the outputs of the controlled block signal transmitting and receiving channels of the diagnosed equipment digital transmission systems: encoder 3, a modulator 4, the frequency Converter 5, amplifier 6, the amplifier high frequency 7, the frequency Converter 8, the demodulator 9, the decoder 10. The unit of analysis can be implemented in various ways. In particular, his scheme shown in Fig. 4, the situation of the xora 14.14.

Informational inputs D analog-to-digital converters 14.1-14.5 connected to the outputs of the modulator 4, the frequency Converter 5, amplifier 6, the amplifier high frequency 7, the frequency Converter 8. Informational inputs D counters "1" 14.6 - 14.13 connected respectively to the outputs of the encoder 3, an analog-to-digital converters 14.1-14.5, demodulator 9, the decoder 10, and their outputs connected to information inputs of the multiplexer 14.14. The output of multiplexer 14.14 connected to the information input of the memory block 16.

Analog-to-digital converters 14.1-14.5 designed to convert a pseudo-random sequence that is an analog type, digital sequence. Circuit analog-to-digital converters 14.1-14.5 identical, known and described, for example, in the book: C. A. Batashev, C. N. Veniaminov and other "Circuits and their applications: a reference guide". -M.: Radio and communication, 1983, pp. 193 - 198. Fig. 6.15.

Counters of single characters 14.6-14.13 designed to determine the number of individual symbols in each j-m Z-bit segment of a selected pseudo-random sequence N(1)ijand represent the number in binary code. Diagram of the counters are known, see, for example, in the book the relationship, 1983, p, 128, Fig. 518 and can be implemented, for example, on the chip CIE (see C. L. awl "Popular digital circuits". -M.: Radio and communication, 1987, pages 235 - 236, Fig. 2.36.a).

The multiplexer 14.14 designed for sequential switching of the outputs of the counters are "1" 14.6-14.13 information to the input D of the memory block 16. Diagram of the multiplexer known, described, for example, in the book: C. S. Gutnikov in. A. Lopatin and other "Electronic devices information-measuring engineering: a tutorial". - L. : LPI them. Kalinina, 1980, pages 70-72, and may be implemented, for example, on the chip CCP (see C. L. awl "Popular digital circuits". -M.: Radio and communication, 1987, pages 143-145, Fig. 1.103).

Block parameter definition 15 is designed to determine the values of the statistical parameters of the selected pseudo-random sequences: the mathematical expectation m(1), the variance d(1), the likelihood of a single symbol p(1), and parameter values of the truncation Y, and K. the structural scheme can be represented in several ways. In particular, the circuit block parameter definition 15 shown in Fig. 5, consists of adders 15.3, 15.6, 15.8, multiplier 15.2, dividers 15.4, 15.5, 15.7, 15.9, 15.10. 15.12, vychitala 15.1, 15.11, 15.13.

Inputs And vidlice to the input a of the multiplier 15.2, the output of which is connected to the input a of the adder 15.3. The input of divide-by-N 15.4 connected to the output of the adder 15.3, and its output connected to the inputs And dividers 15.5 and 15.12. The output of the divider 15.5 connected to the input a of the adder 15.6 the output of which is connected to the input of divide-by-Z 15.7. The output of the adder 15.8 connected to the input of divide-by-N 15.9, the output of which is connected to the inputs B of vychitala 15.1, 15.13, adder and 15.6 divisor on Z 15.10 output of which is connected to the input B of vicites 15.11. The output of the divider 15.12 connected to the input B of vicites 15.13. The outputs of divisors on Z 15.7, 15.10. vychitala 15.11 and 15.13 connected to the information input of the memory block 16.

Adders 15.3, 15.6. 15.8 designed to sum the numbers represented in binary code.

MyCitadel 15.1, 15.11, 15.13 designed to obtain the difference of the numbers represented in binary code.

The multiplier 15.2 designed to perform the operation of multiplication of numbers represented in binary code.

Dividers 15.4, 15.5, 15.7, 15.9, 15.10 and 15.12 designed to perform the operation of dividing the number represented in binary code at a known constant or a variable number, also represented in binary code.

The memory unit 16 is designed to record the distribution parameters 15, the Comparer 17 and unit status display 18. As the memory block can be used in the device, the scheme of which is known and described, for example, in the book: C. A. Batashev, C. N. Veniaminov and other "Circuits and their applications: a reference guide". -M.: Radio and communication, 1983. page 175, Fig. 5.12, and can be implemented, for example, on-chip memory CRU (see C. I. Korneichuk, B. N. Tarasenko "Computing devices on chips: a Handbook". -K.: Engineering, 1988, pp. 85 - 87).

Unit 17 comparison is to compare the measured values of the probability of occurrence of individual symbols p(1), cropping parameters Y and K with known values of po(1), Yoand Koand based on this comparison, calculate the value of a multiplicity of failures L and a decision about the nature of the problem. Option schema Comparer 17 may be represented in Fig. 6. The Comparer 17 consists of Comparators 17.1-17.3, encoder 17.4. vychitala 17.5 and 17.6, adders-vychitala 17.7 and 17.9, multiplier 17.8. divider 17.10 and electronic switch 17.11.

The inputs a and B of the Comparators 17.1 - 17.3, vychitala 17.5 and 17.6 connected to the output of the memory block 16. The outputs G1(A<B). G2(A=B), G3(A>B) Comparators 17.1 - 17.3 connected to information inputs D17.10, control input From an electronic switch 17.11 and information input D of the memory block 16. The output of vicites 17.6 connected to the input B of the adder-vicites 17.7, the output of which is connected to the input of the multiplier Z 17.8. Inputs a and b of the adder - vicites 17.9 connected respectively to the outputs of the multiplier 17.8 and myCitadel 17.5, and its output connected to the input of divide-by-2 17.10 and the input of the electronic switch 17.11. The output of the divider 17.10 connected to the input of electronic switch 17.11, the output of which is connected to the information input D of the memory block 16.

Comparators 17.1-17.3 designed to compare values of numbers represented in binary code: p(1) and po(1), Y and Yo, K and Ko. Diagram of the Comparators are known and can be implemented, for example, on the chip CSP (see C. L. awl "Popular digital circuits". -M.: Radio and communication, 1987, pages 183 - 184, Fig. 1.134).

Encoder 17.4 designed for making decisions about the nature of the failure. Diagram of the encoder is known, as described, for example, in the book: Tokheim R." fundamentals of digital electronics: TRANS. from English." -M.: Mir,1988, pages 119 - 120, Fig. 5.5, and can be implemented, for example, on the chip CMIS (see C. L. awl "Popular digital circuits". -M.: Radio and communication, 1987, pages 140 - 142. rice is oknom code.

Adders-myCitadel 17.7 and 17.9 designed to obtain the sum or difference of numbers represented in binary code.

Schema adders 15.3. 15.6 and 15.8, vychitala 15.1, 15.11, 15.13, 17.5 and 17.6, adders-vychitala 17.7 and 17.9 known, described, for example, in the book: Tokheim R. "fundamentals of digital electronics: TRANS. from English." -M.: Mir, 1988, pp. 231 - 232, Fig. 9.18, and can be implemented, for example, on the chip CIP (see C. A. Batashev, C. N. Veniaminov and other "Circuits and their applications: a reference guide". -M.: Radio and communication, 1983, page 129 -130).

The multiplier 17.8 designed to perform the operation of multiplication of numbers represented in binary code. Scheme multipliers and 15.2 17.8 known, see, for example, in the book: Tokheim R. "fundamentals of digital electronics: TRANS. from English. " -M.: Mir, 1988, pp. 236 - 240, Fig. 9.26, and can be implemented, for example, on the chip CIP (see C. A. Batashev, C. N. Veniaminov and other "Circuits and their applications: a reference guide". -M.: Radio and communication, 1983, pp. 129 - 130).

The divider 17.10 designed to perform the operation of dividing the number represented in binary code at a known constant, is also represented in binary code. Scheme of divisors 15.4, 15.5, 15.7, 15.9, 15.10 and 15.12 and 17.10 known, described, for example, in the book: C. S. GU the PI to them. Kalinina, 1980, PP 44 - 46, 48 - 50, Fig. 21,a, 24, and may be implemented, for example, on the chip CIE, CIE (see C. L. awl "Popular digital circuits". -M.: Radio and communication, 1987, pp. 94 - 97. Fig. 1.69).

Electronic switch 17.11 shown in Fig. 7, is designed to provide a readout of the binary signal output from the adder-vicites 17.9 (a input) or divider 17.10 (log In) information to the input D of the memory unit 16 in accordance with a control signal at the input C. On the physical essence of the electronic switch 17.1 1 is a basic three-position controlled switch. Scheme managed switch 17.11.1 known and described, for example, in the book: C. L. Shyla Popular chip CMOS. The Handbook." -M.: The Jaguar. 1993. page 22.

Device status display 18 is used to display the technical condition of the diagnosed equipment digital transmission systems. The circuit arrangements are known, described, for example, in the book: Tokheim R. "fundamentals of digital electronics: TRANS. from English." -M.: Mir, 1988, pages 124 - 125, Fig. 5.9 and can be implemented, for example, on the chip KID and seven-segment indicator ALA (see C. A. Batashev, C. N. Veniaminov and other "Circuits and their applications: a reference guide"the x signals to implement the desired algorithm for signal conversion and can be implemented on the microprocessor TMS32010 (see, for example, "Digital processing of signals TMS32010 and its application." /Ed. by A. A. Lane. L: YOU, 1990. -296 C. ). Typically, the control unit is a sequential logic circuit and can be synthesized by known rules (see C. S. Gutnikov in. A. Lopatin and other "Electronic devices information-measuring engineering: a tutorial". - L.: LPI them. Kalinina, 1980, pp. 73 - 76, Fig. 42; B. C. Gutnikov "Integrated electronics in the measuring devices." -L.: Energy, 1980. -248 C.).

The claimed device diagnostic equipment digital transmission systems works as follows.

The first step is the determination of the values of the probability of occurrence of individual symbols p(1)ioand cropping parameters Yioand Kioin good condition diagnosed equipment digital transmission systems and storing these values.

With the receipt of the control signal from the control unit 19 "Resolution of the pseudo-random sequence generator 11 generates a pseudo-random sequence Fo(t), which is fed to the input of the encoder 3 of the transmitting tract 1, the transfer of Z-bit pseudo-random segments placentas the standard transformations in the encoder 3, the modulator 4, the frequency Converter 5, the amplifier 6 of the transmitting tract 1, and then is attenuated in the attenuator 13 and is mixed with the signal noise coming from the output of the noise generator 12. In the amplifier of high frequency 7, the frequency Converter 8, the demodulator 9 and the decoder 10 receive path 2 are inverse transformation transmitted pseudo-random sequence.

The output of each i-th, where i = 1, 2, 3,...R, the controlled block of the diagnosed equipment digital transmission systems is the selection of the transformed pseudo-random sequence. The selected pseudo-random sequence F1(t), F2(t), F3(t), F4(t), F5(t), F6(t), F7(t) and F8(t) act on the information inputs of the analysis block 14 shown in Fig.4.

Sequence from the outputs of the modulator 4, the frequency Converter 5, amplifier 6, the amplifier high frequency 7 and the frequency Converter 8, which outputs the analog signal is a view serves information on the D inputs of respective analog-to-digital converters 14.1-14.5, where they are converted to digital form.

Pseudorandom sequences IMDATA relevant information on the D inputs of the counters of single characters (counters "1") 14.6-14.13. According to the control signal "Load", coming on the installation inputs With counters "1" 14.6-14.13 begins counting the number of individual symbols ("1") Nij(1) in each j-m Z-bit segment in each i-th selected pseudo-random sequence.

After receipt of each Z-th symbol segment in each i-th pseudo-random sequence reads the counter value "1" 14.6 - 14.13 by feeding the control signals "address Code" to the input a of the multiplexer 14 and the input X of the memory block 16 in the presence of signal "Write" input mode selection Z memory block 16. The values of the numbers "1" Nij(1) represented in binary code, with the outputs of the counters are "1" 14.6-14.13 act on the information inputs X1 - X8 multiplexer 14.14 respectively, and in accordance with the value of the code combinations of the address inputs And generated by the control unit 19, in turn interconnected to the output Y of the multiplexer 14.14.

From the output of the multiplexer 14.14 Nij(1) is supplied to the information input D of the memory block 16 shown in Fig. 3, and, in accordance with a code combination of the address inputs X and control input Z, recording values of Nij(1) in the corresponding memory cell of the memory block 16 in the following on the, R2(1), N1j(1), N2j(1),..., Nij(1),..., NRj,(1), N1N(1),..., N2N(1), . . ., NiN(1),..., NRN(1), after which reset the counter to "1" by the signal "Clear" inputs With counters 14.6 - 14.13.

After registering in the memory unit 16 values of all numbers "1" Nij(1) in the block parameter definitions the computation of values of mathematical expectation mio(1), dispersion (dio(1) the number "1" in the Z-bit segment and the probability of occurrence of "1" pi(1) in the j-th position of the Z-bit segment and the results of the calculation of mio(1), dio(1) and pio(1) determine the parameter values of the truncation Yioand Kio.

From the output of the memory unit 16 in accordance with the signals "address Code" on the address inputs X and "Reading" at the control input Z generated by the control unit 19 is a sequential reading of the values of Nij(1) belonging to the i-th sequence, and applying these values to the input a of the adder 15.8 block parameter definition 15 shown in Fig. 5, when an enabling signal "Load" input C. In the adder 15.8 is the sum of all j-x values. Nij(1) the i-th sequence, i.e. the computation of

The signal from vyhulenej 19, the control input S. divider operation is performed dividing by the number N, i.e. the computation of

The value of m(1)iofrom the output of the divider 15.9 applied to the input of the divider 15.10, entrance B vicites 15.1, the input B of the adder and 15.7 entrance And myCitadel 15.13. When an enabling signal "Load", produced by the control unit 19, the control input, the divider 15.10 operation is performed dividing by the number Z, i.e. the computation and then, when the signal "Read" on the entrance, you are applying it to the entrance of vicites 15.11 and information input D of the memory block 16, in which, in accordance with the signals "address Code" address input X, and Write the control input Z, generated by the control unit 19, the recording of values of p(1)ioin the corresponding memory cell. In myCitadel 15.11, input And which has a binary value "1", the computation of 1 - p(1)iowhen the signal "load" input With.

The value 1 - p(1)iothe signal "Read" at the input is read and supplied to the information input D of the memory block 16, in which, in accordance with the signals "address Code" on the address input X, and Write the control input Z, generated by the unit upravleniya values m(1)ioand feed it to the entrance of vicites 15.1 the computation of the dispersion values d(1)ioFrom the output of the memory unit 16 in accordance with the signals "address Code" on the address inputs X and "Reading" at the control input Z, generated by the control unit 19 is a sequential reading of the values of Nij(1) belonging to the i-th sequence, and applying these values to the input And myCitadel 15.1 when an enabling signal "Load" input S. myCitadel 15.1 the computation of N(1)ij- m(1)io.

The output signal from myCitadel 15.1 is input to multiplier 15.2, in which the computation of [N(1)ij- m(1)io]2the result of which is input to adder 15.3, when an enabling signal "Load" on his entrance With.

This is followed by zeroing vicites 15.1 and multiplier 15.2 the signal "clear" on the control inputs

In the adder 15.3 calculates the result of which is fed to the input of the divider 15.4 when an enabling signal "Load" on his entrance With.

In the divider 15.4 calculation After calculating d(1)iothe signal "Read" the control input is read values d(1)io< / BR>
Mn is ka" at the input, from the output of the memory unit 16, in accordance with the signals "address Code" on the address inputs X and "Reading" at the control input Z, generated by the control unit 19, is fed the value of p(1)io. In the divider 15.5 the computation of d(1)iop(1)iothe result of which is input Into the adder 15.6,

In the adder 15.6. when an enabling signal "Load" on the entrance, the entrance To which is submitted the value of m(1)io, the computation of m(1)io+ d(1)iop(1)io.

The resulting sum is fed to the input of divide-by-Z 15.7, which, when solving the signal "Load" at the input, the computation of Kio= (mio(1) + dio(1)/pMio(1))/Z. After calculation TOiothe signal "Read" the control input is the read value TO theiofiling values of Kioinformation to the input D of the memory block 16, in which, in accordance with the signals "address Code" on the address input X, and Write the control input Z, generated by the control unit 19, the recording of the values TOioin the corresponding memory cell.

In parallel with calculation of the values of Kiothe computation of the values of Yio. At the entrance to the divider 15.12 with the output Z, produced by the control unit 19, is set to 1-p(1)ioat the entrance And garnered the value d(1)io. In the divider 15.12, when an enabling signal "Load" at the input, the computation of d(1)io/(1- -p(1)io), the result of which is input In vicites 15.13. In myCitadel 15.13, when the signal "Load" input C, input And garnered the value of m(1)iothe computation of Yio= mio(1)-dio(1)/(1-pio(1)). After calculating Yiothe signal "Read" the control input is read the values of Yioand feeding values of Yioinformation to the input D of the memory block 16, in which, in accordance with the signals "address Code" on the address input X, and Write the control input Z, generated by the control unit 19, the recording of values of Yioin the corresponding memory cell.

Calculations performed in block parameter definition 15, are R times for each i-th sequence and all the calculation results are recorded in the memory unit 16.

In the second stage, characterized by the occurrence of an unhealthy state of the diagnosed equipment digital transmission systems (for example, the cases described in Fig. isiand Li< / BR>
Calculating values of m(1)id(1)iand p(1)iand cropping parameters Yiand Kiproduced by the above algorithm, except for some operations: after calculating p(1)iand write its value in the memory unit 16 calculates 1-p(1)iin myCitadel 15.11 not performed; when calculating the values of Yiand Kithe dividers 15.5, 15.12 values p(1)ioand 1-p(1)iocalculated in the first stage.

From the output of the memory unit 16, in accordance with the signals "address Code" on the address inputs X and "Reading" at the control input Z, generated by the control unit 19, the inputs a and b of the Comparators 17.2, 17.3 and 17.4 and vychitala 17.5 and 17.6 Comparer 17 serves values p(1)ioand p(1)i, Yioand Yi, Kioand Kirespectively. With outputs G1(A<B), G2(A=B), G3(A>B) Comparators 17.2 - 17.4 comparison results a and b, allowing the signal "Load" on the inputs, served on informational inputs D1 - D9 encoder 17.1, when an enabling signal "Load" on his entrance With.

The value of the code combination at the output of the encoder 17.1 read signal "Read" received at the control input and is supplied to the information input D beliveme the control unit 19. Code combination at the output of the encoder 17.4 carries information about the nature of the problem of the controlled block signal transmitting and receiving channels of the diagnosed equipment digital transmission systems and is a control signal which is supplied to the selection input mode X adders-vychitala 17.7 and 17.9, divider 17.10 and control input From an electronic switch 17.11.

Calculating the number of failures Lithat is one of the three options.

Option 1. Let Y > Yo, K < Ko. Then the adders-myCitadel 17.7 and 17.9 in accordance with the code combination on their inputs X, will work as myCitadel and adder, respectively, and the divider 17.10 will be locked in the electronic switch output connected to the input A. In vychitala 17.5 and 17.6, in the presence of permissive signals "Load" on the inputs, the computation of Yo-Yo-I, respectively. The output signal from myCitadel 17.6 is applied to the input B of the adder-vicites 17.7, input And which is "1". In the adder-myCitadel 17.7, in the presence of the enabling signal "Load" at the input, the computation of: 1-(Ko-To), then the result is fed to the input a of the multiplier Z 17.8.)Z. From the output of the multiplier signal to the input a of the adder-vicites 17.9, the input of which receives the signal from the output of vicites 17.5. In the adder-myCitadel 17.9, in the presence of the enabling signal "Load" at the input, the computation of Li=(Y0-Y) + (1-(K0-K))Z, then the value of Li, is input to the electronic switch 17.11, and with its output to the input D of the memory unit 16, in accordance with the signals "address Code" on the address input X, and Write the control input Z, generated by the control unit 19.

Option 2. Let Y < Yo, K < Ko. Then the adders-myCitadel 17.7 and 17.9 in accordance with the code combination on their inputs X, will work as myCitadel and adder, respectively, and the divider 17.10 will be opened in the electronic switch output connected to the input C. In this case, all operations are performed according to option 1, but the signal L1 is fed to the input of the divider 17.10, in which, in the presence of the enabling signal "Load" at the input, the computation of Li=[(Yo-Y) + (1-(Ko-K))Z]/2.

Then the value of Liis applied to the input B of the electronic switch 17.11, and with its output to the input D of the memory unit 16 in accordance with the signals "address Code" on the Adra is Y > Yo, K > Ko. Then the adders-myCitadel 17.7 and 17.9 upon receipt of a single pulse on the input selection mode will work as the adder and myCitadel respectively, and the divider 17.10 permissive signal is received at the control input. In this case, unlike option 2, in the adder-myCitadel 17.7 the computation of 1+(Ko-To), and in the adder-myCitadel 17.9 calculates (Yo-Y) - (1-(Ko-K))Z, then the output of the divider 17.10 get the value of

Li=[(1-(Ko-K))Z - (Yo- Y)+]/2=[(Y-Yo) + (1-(K-Ko))Z]/2.

Then the value of Liis input to electronic switch 17.11, and with its output to the input D of the memory unit 16 in accordance with the signals "address Code" on the address input X, and Write the control input Z, generated by the control unit 19.

After that, from the memory unit 16, in accordance with the signals "address Code" on the address input X and the signal "Read" at the control input Z, reads the set of signals that represent the code combination, describing the technical condition (defective block, the nature of the problem and the multiplicity of failure) diagnostic equipment digital transmission systems and served to inform, proishodit decoding the input code combinations and display the technical condition of the diagnosed equipment digital transmission systems using seven-segment indicators.

The effectiveness of the claimed technical solution is as follows. Shortening reliable assessment of the condition of the equipment digital transmission systems allows significantly affect the performance of the transmission systems. So, checking their health known methods require the same accuracy assessment more than 5 minutes. In the process of communication, for example, for systems synchronous digital hierarchy 1 second to lower their level when transmitting units STM passed 150 Mbps information and control pulses (see, for example, A. C. Netes "Basic principles of synchronous digital hierarchy // Networks and systems, N6, 1996. -S. 59 - 62), therefore reducing downtime digital transmission systems can significantly improve their performance. Identification of the nature and the frequency of failure (failure) also increases maintainability, thus increasing their reliability.

1. The way to diagnose the condition of the equipment digital transmission systems, zakljucavanje according to the algorithm of signal conversion, subsequent loosening and mixing it with the signal noise, switching the input of the receiving channel, the reverse transformation, highlighting the recovered pseudo-random sequence, wherein the additional signals are pseudo-random sequence Fi(t) is recovered after each i-th transform where Fi(t) - selected pseudo-random sequence after the first conversion, i = 1,2.3,... R, R is the number of conversions pseudo-random sequence according to the set conversion algorithm, then for each i-th transformation compute the mathematical expectation of the number of individual symbols m(1)i, the variance of the number of occurrence of individual symbols d(1)iand the probability of occurrence of a single symbol p(1)iformula

< / BR>
< / BR>
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and the results determine the parameters of a technical state of equipment for digital transmission systems.

2. Device diagnostic equipment digital transmission systems containing transmitting and receiving paths of the diagnosed equipment digital transmission systems, which include blocks conversion of the signals, the control unit, the pseudo-random generator posledovatelno introduced units of analysis, memory, comparing and displaying state, the output of a pseudorandom sequence generator connected to the input of the transmitting tract of the diagnosed equipment digital transmission systems, the output of which is connected to the input of the attenuator and the output of the attenuator is connected to the input of the reception path of the diagnosed equipment digital transmission systems, the outputs of blocks conversion of the signal transmitting and receiving channels of the diagnosed equipment digital transmission systems connected to the i-th information input unit of analysis, where i = 1, 2, 3, ... R, R is the number of controlled units conversion signal transmitting and receiving channels of the diagnosed equipment digital transmission systems, to the information input of the memory block connected information outputs blocks of the analysis, characterization and comparison, and its data output is connected to the information input block parameter definitions, comparisons and status display, and control inputs of a pseudorandom sequence generator, units of analysis, characterization, memory, comparison, and display the status of connected to the corresponding outputs of the control unit.

 

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FIELD: radio communications.

SUBSTANCE: pulse noise is detected upon conversion of signal received into intermediate frequency, noise active time is determined, information signal is disconnected from amplifier incorporated in superheterodyne receiver, noise-affected part of information signal is recovered by eliminating simulator signals during extrapolation, and superheterodyne receiver is checked for serviceability at intermediate frequency.

EFFECT: enhanced precision of superheterodyne receiver serviceability check.

1 cl, 1 dwg

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