Device diagnostics of communication systems

 

(57) Abstract:

The invention relates to the field of radio, namely to control the technical state of the communication systems. The aim of the invention is the construction of diagnosing device, allowing to assess the technical condition of the communication systems operating in the frequency-adaptive mode, due to simulation noise at the input of the system. The device includes: diagnose system (the transmission path 1, path 2 reception, equipment automated communication 3 controlled attenuator 4), the generator SRP 5, the error detector 6, a counter 7, a clock generator 8, the key 9, a broadband noise generator 10, tunable barrier filter 11, the control device is tunable barrier filter 12, the adders 13, 14. Using a broadband noise generator 10 and tunable barrier filter 11, at the input of the communication system over the entire operating frequency range is generated interference and optimal communication frequency band, changing their position on the frequency axis. Rebuilding communication systems tested pseudo-random sequence and the error rate is determined by the level of technical state of the system. 15 Il.

The known device diagnostics, see the invention of the Device for controlling the operability of the radio. (51) 4 H 04 B 17/00, published 22.02.90 year, issue No. 134; the invention of "Device diagnostic equipment digital transmission systems" (51) 5 HO 4 B 3/46 published 15.05.97, Bulletin No. 18. They contain device-forming pseudo-random test sequence (SRP), the comparator test sequence error counter. These devices allow you to diagnose a communication system according to the coefficient of the error.

A common shortcoming of this analogy is the lack of diagnosis of automated communication systems when working in CHARMS.

Known devices closest to the claimed device (prototype) with its technical essence is known diagnosis device based on the measured error rate (described in the book: Metrology, standardization and measurement technology, telecommunications/ edited by B. N. Lame M.: Radio and communication, 1986, pp. 327-329, Fig.11.25). The device prototype consists of a clock generator, generators, SRP, bug detector, key error counter, stroke counter, trigger, selector clock frequency.

This device is optimal as it allows to diagnose communication system by measuring the error rate, when you pass the test the SRP through the controlled system.

This device does not provide sufficient reliability of the diagnosis because of the limited measurement time, and it does not include the reconstruction algorithms of automated communication systems with frequency-adaptive modes.

The aim of the present invention is to develop a device for diagnosing the state of communication systems that enhance the reliability of the diagnosis of automated communication systems operating in the frequency-adaptive modes.

This objective is achieved in that in the known device diagnosis based on the measurement of the error rate that contains a clock generator, genarators computerise communication (ABC), a controllable attenuator. The first generator output SRP is connected to the low-frequency (LF) input of the transmission path, high frequency (HF) output which is connected to the input "send" controlled attenuator. The control inputs rebuilding the transmission paths and reception connected respectively to the first and second control outputs of the equipment ABC information the input of which is connected to the output of the intermediate frequency (if) of the reception path. The second input of the error detector is connected to the LF output of the reception path. The second output of the generator SRP connected to the first input of the error detector, the output of which is connected to the second input of the counter, the first input and the generator input SRP in parallel connected to the output of the clock generator, whose input is connected to the output of the key, the input of which is connected to the outputs of the counter. Added the following elements: a broadband noise generator, tunable barrier filter, the control device is tunable barrier filter (UPSF), the first and second adders. RF input of the reception path is connected to the output of the second adder. The first input of which is connected to the output of "PFP" controlled attenuator. The first and second outputs of the broadband generators is radiallaho filter. The first and the second input of which is connected respectively to the first and second output devices UPSF. The output of tunable barrier filter connected to the first input of the first adder. The output of which is connected to the second input of the second adder. The first control inputs of the first and second adders, controlled attenuator combined and connected to the first output pin of the switch B1 "Adaptation". Similarly, the joint second input and is connected to the second output contact of the switch Q1. Input pin which is connected to the input power.

The proposed device allows you to check the tuning algorithm of automated communication systems with SPELLS, while increasing the accuracy and reducing the time of diagnosis, by adjusting the ratio of signal to noise ratio at the input of the communication system, simulating interfering environment.

In Fig. 1 shows a structural diagram of the claimed device diagnostics status of communication systems;

in Fig. 2 is a structural diagram of the transmission path;

in Fig. 3 is a block diagram of the reception path;

in Fig. 4 is a block diagram of the apparatus ABC;

in Fig. 5 is a structural diagram of the controlled attenuator;

in Fig. 6 is a variant of the variant structural diagram of the counter;

in Fig. 9 is a variant of the structural diagram of the clock generator;

in Fig. 10 is a variant of the structural schema key;

in Fig. 11 is a variant of the structural and schematic diagrams of the broadband noise generator;

in Fig. 12 is a variant of the structural and schematic diagrams tunable barrier filter;

in Fig. 13 is a variant of the structural scheme of the device UPSF;

in Fig. 14 - variant structural and schematic diagrams of the first and second adders;

in Fig. 15 - graphs to evaluate the effectiveness of the claimed device.

Device diagnostics communication system shown in Fig. 1 includes a transmission path 1, the reception path 2, the apparatus ABC 3 controlled attenuator 4, the generator SRP 5, the error detector 6, a counter 7, a clock generator 8, the key 9, a broadband noise generator 10, tunable barrier filter 11, the device UPSF 12, the first 13 and second 14 adders. "RF" output of the transmission path 1 is connected to input "send" controlled attenuator 3. The control inputs of the transmission paths 1 and receive 2 connected respectively to the first and second control outputs of the equipment ABC 3, the information input of which is connected to the output of the "FC" of the reception path 2. The first generator output SRP 5 connect Ihad generator SRP 5 connected to the first input of the counter 7. The first input and the generator input SRP 5 in parallel connected to the output of the clock generator 8, the inlet of which is connected to the output of the key 9, the input of which is connected to the outputs of the counter 7. "RF" input of the reception path 2 is connected to the output of the second adder 14. The first input of which is connected to the output of "PFP" controlled attenuator 4. The first and second outputs of the broadband noise generator 10 is connected respectively to the second input of the first adder 13 and a third input of the tunable barrier filter 11. The first and the second input of which is connected respectively to the first and second outputs of the device UPSF 12. The output of tunable barrier filter 11 is connected to the first input of the first adder 13. The output of which is connected to the second input of the second adder 14. The first control inputs of the first 13 and second 14 adders, controlled attenuator 4 combined and connected to the first output pin of the switch B1 "Adaptation". Similarly, the joint second input and is connected to the second output contact of the switch Q1. Input pin which is connected to the input power.

For the claimed device is not fundamentally important to reveal the structure of the automated systemst. 125-128 Fig. 5.1, 5.3; page 160 of Fig. 5.13; page 259 Fig. 6.1; pp. 291-299 Fig. 7.1, 7.2). General view of the elements of the communication system, as a variant, shown in Fig. 2, figs. 3, Fig. 4, Fig. 5.

The transmission path 1 shown in Fig.2 as an element of the automated system of communication with CHARMS, includes: matching the antenna device 1.1 (ACS), the power amplifier 1.2 (MIND), the causative agent of 1.3, the system of automatic adjustment of 1.4. RF output communication system is output SAU 1.1, the input of which is connected to the output of the MIND 1.2, whose input is connected to the output of the exciter 1.3, the input of which is "bass" input communication system. The control inputs restructuring SAU 1.1, MIND 1.2, pathogen 1.3 connected to the corresponding outputs of the automatic system configuration 1.4, for a controlled input of which is connected external device automation.

The reception path 2 shown in figure 3 as an element of the automated system of communication with CHARMS, includes: SAU 2.1, tract intermediate frequency (if) 2.2, private reception path 2.3, synthesizer 2.4, the system of automatic adjustment of 2.5. "RF" output communication system is the output of the ACS 2.1, the entrance of which is connected to the output path inverter 2.2, whose input is the output of a private reception path 2.3, the entrance of which is a low frequency input communication system. The inputs of the reorganizations is AU 2.1, frequency reception path 2.3, synthesizer 2.4 connected to the corresponding outputs of the automatic system configuration 2.5 for a controlled input of which is connected external device automation. The second output path inverter 2.4 is the way forward, "FC" of the reception path 2.

Apparatus ABC 3 shown in Fig.4 as part of the automated communications system with CHARMS includes: the unit of analysis 3.1, the forming device and process commands 3.2, the control unit 3.3. An information input apparatus ABC 3, an input device analysis 3.1, the output of which is connected to the control device, 3.3, command input and the output of which is connected to the corresponding input and output devices of formation and processing of commands 3.2. Control outputs of the control device of 3.3 are control outputs 1 and 2 equipment ABC.

Controlled attenuator 5, as part of the automated communications system constructively can be a part of the reception path 2 and (or) individual element (equivalent to the antenna). If the system does not have this, you can perform according to the scheme shown in Fig. 5 and includes a switch DD4.1, the first 4.2 and 4.3 second attenuators. Enter "send" is the first 4.2 attenuator. Output mapping is done attenuator DD4.1. To the first and third output of which is connected in parallel input "PFP". The Login Panel.1 connected to the input V1 switch DD4.1. To the inputs V2 and V3 which are parallel connected input "Panel.2". Attenuators 4.2 and 4.3 of the known device (see MFF N 1147, Reference book of Amateur radio constructor, M., Radio and communications, 1990, page 600 Fig. 13.11). Switch DD4.1 the known device (chip type CCT).

Generator SRP known device (see MFF N 1125, Elements REU, M., Radio and communications, 1988, page 134 Fig. 10.11). Is designed to generate pseudo-random test sequence. Alternatively may be performed according to the scheme shown in Fig. 6. Includes shift registers DD5.1, DD5.3 (type CIR), the element OR NOT DD5.2 (type CLP). When the input unit 8 is connected to the clock inputs of shift registers DD5.1, DD5.3. The output Q3the first register DD5.1 is connected to the data input D of the second register DD5.3. Available outputs Q1, Q3connected to the inputs of the chip AND IS NOT DD5.2. The output of which is connected to the data input D of the first shift register DD5.1. The output Q4the second shift register DD5.3 is output to the blocks 1 and 6.

The bug detector is a known device (see MFF N 1125, Elements REU, M., Chapman and hall, 1988, pp. 93-95 Fig.6.1-6.10). Destined is Fig. 7. Consists of cells connected in series OR NOT DD6.1, DD6.2 (type CLP). The output of the first chip DD6.1 connected differential system R1, C1, selection of the capacitor C1 takes into account the delay of the SRP from block 2.

Counter the known device (see the Handbook for integrated circuits, Meters, Energy, 1980., edited by centuries Tarabrina p. 690-718 Fig. 5.166 - 5.219, pages 622-626 Fig. 5.86 - 5.90). Is designed to count pulses from a clock generator and control errors, fixed a bug detector. Alternatively may be performed according to the scheme shown in Fig. 8. Includes the tick count 7.1 (160 000 cycles), the error counter 7.2. (up to 99 999 error). This configuration makes it possible to determine the coefficient error POsh:

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The tick count includes serially connected counters DD7.1.1 - DD7.1.5. When this transfer outputs Coconnected to the clock inputs. The control is performed from block 8 to the clock input of the first counter DD7.1.1. The output Q4counter DD7.1.5 is output to the block 9. The reset inputs R given in parallel and are output to the block 9. Error counter includes serially connected counters DD7.2.1 - DD7.2.5, the outputs of which are connected decoders DD7.2.11-DD7.2.15 with terms of the tenth pulse to the outputs Q2, Q4counters DD7.2.1 - DD7.2.5 is connected to the chip AND NOT DD7.2.16 - DD7.2.20. The outputs are connected to first inputs of the chip AND IS NOT DD7.2.6 - DD7.2.10. The second inputs of which are given in parallel and are output to the block 9. The outputs of circuits AND DD7.2.6-DD7.2.10 is connected to the reset inputs of these counters DD7.2.1-DD7.2.5. Counters DD7.1.1-DD7.1.4 chip type KIE, DD7.1.5; DD7.2.1-DD7.2.5 chip type KIE, chips AND DD7.2.6-DD7.2.10; DD7.2.16-DD7.2.20 type CLA; decoders DD7.2.11-DD7.2.15 type KID; indicators DD7.2.21-DD7.2.25 type ALS.

The clock generator is designed for generating control clock pulses. Presented on Fig. 9 and includes first and second pulse generators 8.1 and 8.2. fixed-frequency generation, switch, 8.3, the switch B2 (pulse generator). The pulse generator 8.1 and 8.2 of the known device. Performed identically. (see the Handbook for integrated circuits, Meters , Energy, 1980, Ed. by C. C. Tarabrina, page 588 Fig. 5.35; 5.36). As an option can be made on the series connected circuits AND DD8.1.1 (DD8.2.1) - DD8.1.2(DD8.2.2) type CLA. The frequency of oscillation is determined by the resistance R1. Switch DD8.3 the known device (see chip type CCT). The outputs of pulse generators 8.1, 8.2 of the connected switch DD8.3 is connected to the output contacts of the switch B2, input which is input from block 9.

The key is to connect the control pulses. Presented on Fig. 10. Can be performed on chip AND IS NOT DD9.1 (type CLA). The "Ref.2 connected to the inputs of the chip AND IS NOT, the output of which is output to the block 8. "VH connected to the housing via the first contacts button KN1 "Reset". Input N 3 is connected to the positive power source through the second contact button KN1 "Reset".

Broadband noise generator allows to obtain a noise signal in the frequency band of operation of the communication system. It is shown in Fig.11. The master oscillator 10.1 (see MFF N 1125. The elements of the RG. M, publisher Chapman and hall, 1988, pp. 106 - 107, Fig. 7.23 in which the noise source is diode VD1, the signal of which is fed to a two-stage amplifier). The amplification 10.2 in the form of an operational amplifier (see chip type UV - UV Handbook of integrated circuits, Meters , Energy, 1980, Ed. by C. C. Tarabrina page 451). The AGC system 10.3. Which ensures the normal distribution law, thereby extending the range of the noise generator in the field of high frequencies, is going on a field effect transistor. Matching circuit 10.4 in the form of voltage divider resistors. The yield of sadjad system AGC 10.3, the output of the controlled master oscillator noise 10.1 on output voltage. The outputs of the matching circuit 10.4 are outputs to blocks 11 and 13.

Tunable stop filter provides suppression in the selected frequency band. It is shown in Fig.12 the known device and can be made in the form of the l-shaped LC barrier filter 11.1. The reconstruction filter chain input control voltages 11.2 (custom element type waikamoi matrix CWSA, see MFF, Reference book radio Amateur designer, PM, Radio and communications, 1990, issue 1147, page 23-24 Fig. 1.22 (and), page 42 Fig. 2.11).

The control device of PES is shown in Fig.13 the known device and can be made in the form of generator speed voltage (see MFF, Reference book radio Amateur designer, PM, Radio and communications, 1990, issue 1147, page 75, Fig. 75). Is designed to generate control voltages. Includes the pulse generator 12.1 pulse counter 12.2, 12.3 first and second 12.4 resistor matrix, the first DA12.5 and the second DA12.6 operational amplifiers. Thus the output of the pulse generator 12.1 is connected to the input of a pulse counter 12.2. The outputs of which are connected in parallel to the inputs of the first 12.3 and Uchennyh negative feedback. The result is two chains forming a stepped voltage. Levels will be determined by the resistance of the switched resistor in the matrices and parameters of amplifiers and step repetition frequency of the pulse generator 12.1.

The first 13 and second 14 adders shown in Fig. 14 of the known device. Performed identically (see MFF N 1125, Elements REU, M., Radio and communications, 1988, page 57 Fig. 2.15) in addition to the aggregation of input signals to provide output level adjustment due to selection of resistors R2, R6.

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The required level at the output of the device is switched through the switch DD13.1 (DD14.1) (type CCT), which is managed through the switch B1 "Adaptation".

The device operates as follows.

In accordance with the fact that the communication system with adaptive mode of operation including the transmission path 1, path 2 reception, equipment automated communication 3, changes the frequency settings and selects the optimal with regard to noise at the input of the communication system due to broadband noise generator 10 simulates the noise situation in the whole range, from which the tunable barrier filter 11 "cut" Polo the connection) bandwidth and rebuild a system of communication within the band.

Due to the electronic controls of PES 12 change suitable for communication bandwidth. Apparatus ABC 3 will repeat the process of restructuring the system of communication within the new runway.

The correct adjustment is determined by the quality of communication by measuring the number of incorrectly received pulses controlled by the error detector 6 and the counter 7 at the set time interval. This should be a requirement on the error rate:

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where

Ntotal- 160 000 pulses

If the number of distorted pulses does not exceed the allowable value, then the decision about efficiency equipment adaptive communication systems. Shows the number of distorted pulses, reflecting the technical condition of the adaptive communication systems.

If the number of distorted pulses exceeds the allowable value, it is concluded that the failure of the equipment.

The device works according to the following algorithm.

With early diagnosis with the first output of a broadband noise generator 10, the signal noise is fed to the third input of the tunable barrier filter 11. Simultaneously on the first and second inputs from the output of the device is wow barrier filter 11 is formed by a noise signal, in the frequency range of operation of the communication system, with a cut strip MFbniwhich is fed to the second input of the first adder 13, the output of which a second input of the second adder 14, the output of which is input to the reception path 2. This information is supplied to the apparatus ABC 3, which rebuilds the transmission paths 1 and receive 2 in the upper band MFbni. When the output device UPSF 12 will receive the following i+1 levels of control voltages, changing the position of a cut strip MAbni+1equipment ABC 3 rebuilds the transmission paths 1 and reception within the new band. This cycle adjustment is repeated for all frequencies. The correct adjustment is determined by the quality of the passing of the test sequence for the circuit: generator output SRP 5, the input of the transmission path 1, the input transfer controlled attenuator 4, the output of PFP on which the first input of the second adder 14, the output of which is input to the reception path 2, the output of which is connected to the input of the error detector 6. Simultaneously with the second output of a broadband noise generator 10, a signal is applied to the first input of the first adder 13 to provide the desired ratio of signal to noise ratio at the input of the receive path 2.

The bug detector is determined by the>/P>When NOsh<Nthe conclusion on the performance of adaptive communication systems. The end.

When NOsh>NSSswitch "Adaptation" is translated in position "off" and turn off equipment ABC (off adaptive mode). Control voltage on the first 13 and second 14 adders, controlled attenuator 4. At the same time from the transmission path 1 and receive 2 off equipment ABC 3 and provides the alignment on the level of switching blocks.

Starts the test sequence.

If the conclusion of a malfunction of equipment ABC. The end.

If the conclusion of a malfunction of the transmission paths 1 and receive 2. The end.

When evaluating the effectiveness of the claimed technical solution is one of the defining requirement for reliability of measurement error ratio . In order to estimate the probability of error coefficient error has formula (see E. S. Ventsel, Theory of probability and its engineering application, M., ed. Science, 1988, page 463, f-La 11.8.5).

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where

F - function Laplace;

the width of the confidence interval;

N - number of pulses.

Calculations pok is sirokopolosnie noise generator 10, at the input of the receiver decreases the signal-to-noise (h2o) . The noise signal is injected on the line: the second output broadband noise generator 10 is connected to the second input of the first adder 13, which output to the second input of the second adder 14, the output of which is to "RF" input of the reception path 2. According to the reference data (see Military communication systems/ Ed. by centuries Ignatova, Leningrad YOU, 1989, pp. 39-40 table. 2.2; 2.3, the results of the calculations are presented in the graphs in Fig. 15), while reducing the h2o(h2artificially increases the error rate to p*aboutW= 310-1.

The reliability of the measurements will then be equal to:

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Dividing (1.7) (1.6), we obtain a gain in accuracy of measurement:

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The measurement time at a speed of 1200 bit/s to 2.2 minutes

Thus, the proposed device allows you to diagnose automated communication systems while increasing the reliability of measurement.

Device diagnostics of communication systems, containing the transmission path, the reception path, the apparatus computerise communication, controlled attenuator, the pseudo-random sequence generator, error detector, counter, strike the second control outputs of the automated equipment management communication information the input of which is connected to the output of the reception path, the high frequency output of the transmission path connected to the input of the controlled attenuator, the first output of a pseudorandom sequence generator connected to the frequency input of the transmission path, the second input of the error detector connected to the frequency output of the reception path, the second output of a pseudorandom sequence generator connected to the first input of the error detector, the output of which is connected to the second input of the counter, the first input and the input of the pseudorandom sequence generator in parallel connected to the output of the clock generator, whose input is connected to the output of the key inputs which polucheny to the outputs of the counter, characterized in that that added a broadband noise generator, tunable barrier filter, the control device is tunable barrier filter, the first and second adders, the switch "Adaptation", with high-frequency input of the reception path is connected to the output of the second adder, a first input of which is connected to the output controlled attenuator, the second and first outputs of the broadband noise generator connected sooted the second input of which is connected respectively to the first and second outputs of the control device of tunable barrier filter, the output of tunable barrier filter connected to the first input of the first adder, the output of which is connected to the second input of the second adder, the first control inputs of the first and second adders, controlled attenuator combined and connected to the first output pin of the switch "Adaptation", the second output contact of which is connected to the second control inputs of these devices, the input switch is connected to the control diet.

 

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