CN113596895B - Communication system IEMI vulnerability assessment system and assessment method - Google Patents
Communication system IEMI vulnerability assessment system and assessment method Download PDFInfo
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Abstract
The invention relates to an IEMI vulnerability assessment system and an IEMI vulnerability assessment method for a communication system, which are used for solving the technical problems that an electromagnetic environment and a use scene close to a real environment cannot be simulated in a test environment in the research of the influence of the electromagnetic pulse on the performance of the communication system in the prior art, and the electromagnetic pulse conduction coupling mechanism and the communication performance index cannot be further researched due to the high integration of actual equipment. The system comprises a communication system, an IEMI environment library, a traditional communication interference waveform library, a channel model library, a simulation environment parameter control module and an effect index evaluation analysis module; the communication system comprises short wave communication, ultrashort wave communication, meteor trail communication and covered wire communication; each communication consists of a transmitter and a receiver, which are both composed of a baseband signal processing unit and a radio frequency channel model library. The evaluation method comprises the evaluation of the coupling conduction analysis of the IEMI electromagnetic interference and/or the performance degradation effect of a key vulnerable component on the communication system.
Description
Technical Field
The invention relates to a communication system IEMI vulnerability assessment system and an assessment method, which are particularly applied to performance degradation assessment of a communication system in a malicious electromagnetic interference (Intentional Electromagnetic Interference, IEMI) environment.
Background
With the rapid development of modern electronic technology, wireless communication systems are subject to attacks by various kinds of malicious electronic interference (IEMI), such as high-power microwaves (HPM), ultra-wideband electromagnetic pulses (UWB-EMPs), high-altitude electromagnetic pulses (HEMP), etc. (see GIRI D V, HOAD R, SABATH f.high-power electromagnetic effects on electronic systems [ M ]. Lon: ARTECH holes, 2020:20-30). When the communication system is attacked by IEMI, the effect phenomena mainly include hard faults (system faults cannot be communicated), soft effects (recovery after restarting) and permanent performance degradation (see Zhou Bihua, chen Bin and Dan Lihua. Electromagnetic pulse and protection engineering [ M ]. Beijing: national defense industry Press, 2003;Coburn W O,Nguyen E,Reyzer R J.High-altitude electromagnetic pulse survivability assessment of the harris RF-3200transceiver,ADA258347,Adelphi MD:Harry Diamond Labs,Sep.1992.). Wherein, permanent performance degradation indicates that the system can continue to work, but certain components therein which affect communication performance have performance damage, and influence the overall performance of the system, such as the reduction of indexes of communication distance, sensitivity, transmission power and the like (see DUC, maoC, CUI Z et al, transient response monitoring and effect on Rf front-end Ics of Wireless communication system, IEEE EMC COMPO Conference, 2019). In practical environments, such as long-distance complex terrains and communication in complex electromagnetic environments with various electronic countermeasures, higher requirements are imposed on the system performance, and research on accurately evaluating the influence of electromagnetic pulses on the performance of the communication system is necessary.
Currently, the main problems in the research of evaluating the effect of electromagnetic pulses on the performance of communication systems are:
1. electromagnetic environment and use scene close to the real environment cannot be simulated in the test environment;
2. because of the high integration of practical equipment, the electromagnetic pulse conduction coupling mechanism cannot be further researched and the fine measurement of the communication performance index cannot be performed.
Therefore, in order to reduce the test cost and improve the test efficiency, a system effect simulation evaluation platform needs to be established by using computer software.
Disclosure of Invention
The invention aims to solve the technical problems that in the existing research for evaluating the influence of electromagnetic pulses on the performance of a communication system, the electromagnetic environment and the use scene close to the real environment cannot be simulated under the test environment, and the electromagnetic pulse conduction coupling mechanism cannot be further researched and the communication performance index fine measurement cannot be performed due to the high integration of actual equipment, and provides an IEMI vulnerability evaluation system and an IEMI vulnerability evaluation method of the communication system.
In order to solve the technical problems, the technical solution provided by the invention is as follows:
the invention provides a communication system IEMI vulnerability assessment system, which is characterized in that:
the system comprises a communication system, an IEMI environment library, a traditional communication interference waveform library, a channel model library, a simulation environment parameter control module and an effect index evaluation analysis module;
the communication system comprises short wave communication, ultrashort wave communication, meteor trail communication and covered wire communication; each communication consists of a transmitter and a receiver, wherein the transmitter and the receiver are composed of a baseband signal processing unit and a radio frequency channel model library;
the IEMI environmental library comprises HEMP, HPM and/or UWB-EMPs strong electromagnetic environmental waveforms;
the conventional communication interference waveform library comprises electronic countermeasure waveforms of narrow-band interference, comb interference and/or broadband interference;
the channel model library comprises a short wave channel model, an ultrashort wave channel model, a meteor trail channel model and a covered wire channel model;
the simulation environment parameter control module is respectively connected with the IEMI environment library, the traditional communication interference waveform library, the transmitter and the receiver of the communication system and the effect index evaluation analysis module, and is used for communication system type selection, service receiving and transmitting control parameter configuration, channel model and communication interference model selection, strong electromagnetic environment waveform selection, response monitoring point setting and effect index evaluation analysis control;
the effect index evaluation analysis module is used for evaluating and analyzing index parameters of a radio frequency receiving and transmitting channel, receiving performance and anti-interference capability of the transmitter and the receiver under the action of electromagnetic pulse;
the transmitter baseband signal processing unit is communicated with the receiver baseband signal processing unit through the transmitter radio frequency channel model library, the channel model library and the receiver radio frequency channel model library in sequence; the IEMI environmental library applies strong electromagnetic environmental waveforms to the transmitter radio frequency channel model library and the receiver radio frequency channel model library; the legacy communication interference waveform library applies an electronic countermeasure waveform to a channel model library.
Further, the transmitter comprises a signal source generating unit, an error control coding unit, an interleaving unit, a pulse shaping unit, a modulating unit, an up-conversion unit, a frequency hopping/fixing unit and a power amplifier which are connected in sequence; the system comprises a signal source generating unit, an error control coding unit, an interleaving unit, a pulse forming unit and a modulating unit, wherein the signal source generating unit, the error control coding unit, the interleaving unit, the pulse forming unit and the modulating unit belong to a baseband signal processing unit, and an up-conversion unit, a frequency hopping/frequency fixing unit and a power amplifier belong to a radio frequency channel model library;
the receiver comprises a normal/degraded low-noise amplifier, a frequency-hopping/frequency-fixing unit, a down-conversion unit, a demodulation unit, a matched filtering unit, a de-interleaving unit, an error control decoding unit and a signal sink unit which are connected in sequence; the normal/degraded low noise amplifier, the frequency-hopping/frequency-fixing unit, the down-conversion unit and the demodulation unit belong to a radio frequency channel model library, and the matched filtering unit, the de-interleaving unit, the error control decoding unit and the information sink unit belong to a baseband signal processing unit.
Further, the channel model library comprises a Gaussian white noise channel model, a short wave watterson channel model, an ultrashort wave Egli channel model, a meteor trail underdensity type channel model, a meteor trail overdensity type channel and a twisted pair channel model considering an ideal constant parameter channel.
Further, the index parameters include packet transmission success rate, data transmission rate, transmission power, and reception sensitivity.
The invention also provides an evaluation method based on the communication system IEMI vulnerability evaluation system, which is characterized in that:
coupled conduction analysis including IEMI electromagnetic interference and/or evaluation of the impact of critical vulnerable components on performance degradation of a communication system;
1) The coupling conduction analysis of the IEMI electromagnetic interference includes:
1.1 Selecting a communication system type, setting communication receiving and transmitting parameters, selecting a channel model from a channel model library, and selecting a communication interference model from a traditional communication interference waveform library;
1.2 Selecting a strong electromagnetic environment waveform from the IEMI library, and setting a field intensity peak value;
1.3 Setting the tail end of the antenna, an amplifier in the radio frequency channel, the front end of the band-pass filter and the rear end of the band-pass filter as response monitoring points;
1.4 The communication system carries out communication according to the set communication receiving and transmitting parameters, the channel model and the communication interference model, loads a strong electromagnetic environment waveform with a set field intensity peak value, and stores a response monitoring point waveform after the communication is finished;
1.5 Analyzing the coupling response and the communication capacity of the communication system according to the waveform data of the response monitoring points and the communication performance index data, wherein the system coupling response analysis refers to the conduction condition of electromagnetic pulses on a receiving and transmitting channel of the communication system, and the system performance index parameters comprise packet transmission success rate, data transmission rate, transmitting power and/or receiving sensitivity;
2) The evaluation of the impact of the critical vulnerable component on the performance degradation of the communication system comprises:
2.1 Carrying out communication system vulnerability irradiation test or injection test on the key vulnerable assembly to obtain a damaged key vulnerable assembly;
2.2 Electrical performance testing is carried out on the damaged key vulnerable components, and an effect mechanism is carried out to detect and determine damage points; the electrical performance test includes a noise figure and/or a gain;
2.3 Using a polynomial method to construct a behavior model of the damaged critical vulnerable component, replacing normal communication system components in the communication system IEMI vulnerability assessment system with the damaged critical vulnerable component model;
2.4 Selecting a communication system, selecting a performance degradation analysis function;
2.5 Setting an evaluation index parameter; the evaluation index parameters comprise transmitting power, receiving sensitivity and/or system error rate;
2.6 Operating an IEMI vulnerability assessment system of the communication system, and storing test data;
2.7 According to the test data, the index parameters of the communication system are evaluated and analyzed.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a communication system IEMI vulnerability assessment system and an assessment method, which are an IEMI vulnerability assessment system for various communication systems, can accurately simulate the operation protocols of various communication systems, simulate the coupling response of various IMEI attack waveforms in the communication system and the performance influence of the coupling response on the system, realize the research of electromagnetic pulse conduction coupling mechanism and the fine simulation calculation of communication performance indexes, thereby effectively assessing the influence of a damage component on the performance degradation of the system.
2. According to the communication system IEMI vulnerability assessment system and the communication system IEMI vulnerability assessment method, the four communication systems adopt standard communication algorithms, the communication system IEMI vulnerability assessment system is typical and representative, a channel model of the communication system IEMI vulnerability assessment system can accurately reflect actual spatial distribution and channel characteristics of a real system, the communication system IEMI vulnerability assessment system can be close to an actual application background, and an electromagnetic environment and a use scene close to the actual environment can be simulated in a test environment.
3. According to the communication system IEMI vulnerability assessment system and the assessment method, the study of the influence of the damaged component on the system performance degradation is realized by establishing the behavior model of the damaged component.
4. The system and the method for evaluating the vulnerability of the communication system can study the coupling response waveforms of the ports of each component of the communication system and the communication waveforms after interference under various IEMI interference attack conditions.
Drawings
FIG. 1 is a schematic diagram of the architecture of the IEMI vulnerability assessment system of the communication system of the invention;
fig. 2 is a schematic diagram of a transmitter;
fig. 3 is a schematic diagram of a receiver;
FIG. 4 is a flow chart of the IEMI vulnerability assessment method of the communication system of the invention;
FIG. 5 is a screenshot of the analysis result of the HEMP coupling response of the ultrashort wave communication system according to the present invention;
fig. 6 is a screenshot of a performance degradation analysis result of an ultrashort wave communication system in the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
The invention designs an IEMI vulnerability assessment system of a communication system and an assessment method based on the assessment system, which take an ideal model of the communication system and an actual application scene into consideration, and consider the traditional electronic anti-interference complex electromagnetic environment.
The invention relates to a communication system IEMI vulnerability assessment system, which is a communication system IEMI vulnerability simulation software framework taking actual combat into consideration, wherein the software is compiled by MATLAB 2019, and as shown in figure 1, the communication system IEMI vulnerability assessment system comprises a communication system, an IEMI environment library, a traditional communication interference waveform library, a channel model library, a simulation environment parameter control module, an effect index assessment analysis module and the like; the communication system is based on a standard communication model, and comprises a short wave channel model, an ultrashort wave channel model, a meteor trail channel model and a covered wire channel model (the four communication systems all adopt standard communication algorithms, are typical and representative, and the channel model can accurately reflect the actual spatial distribution and channel characteristics of a real system and can be close to the background of actual application); each communication consists of a transmitter and a receiver, wherein the transmitter and the receiver are composed of a baseband signal processing unit and a radio frequency channel model library; as shown in fig. 2, the transmitter includes a source generating unit, an error control coding unit (the error control coding unit may take various forms, such as a cyclic code error correction coding unit form), an interleaving unit, a pulse shaping unit, a modulation unit, an up-conversion unit, a frequency hopping/fixing unit, and a power amplifier, which are sequentially connected; the system comprises a signal source generating unit, an error control coding unit, an interleaving unit, a pulse forming unit and a modulating unit, wherein the signal source generating unit, the error control coding unit, the interleaving unit, the pulse forming unit and the modulating unit belong to a baseband signal processing unit, and an up-conversion unit, a frequency hopping/frequency fixing unit and a power amplifier belong to a radio frequency channel model library; as shown in fig. 3, the receiver includes a normal/degraded low noise amplifier (the noise amplifier is an LNA, which is a normal low noise amplifier, and becomes a degraded low noise amplifier after being damaged), a frequency-hopping/frequency-fixing unit, a down-conversion unit, a demodulation unit, a matched filtering unit, a deinterleaving unit, an error control decoding unit (the error control decoding unit may be in various forms, such as a cyclic code error correction decoding unit form), and a sink unit, which are sequentially connected; the normal/degraded low noise amplifier, the frequency-hopping/frequency-fixing unit, the down-conversion unit and the demodulation unit belong to a radio frequency channel model library, and the matched filtering unit, the de-interleaving unit, the error control decoding unit and the information sink unit belong to a baseband signal processing unit.
The IEMI environmental library comprises strong electromagnetic environmental waveforms such as HEMP, HPM and/or UWB-EMPs, wherein the waveform parameters are respectively referred to as GIRI D V, HOAD R, SABATH F.high-power electromagnetic effects on electronic systems [ M ] LONDON: ARTECH HOUSE,2020:20-30. The traditional communication interference waveform library comprises traditional electronic countermeasure waveforms such as narrow-band interference, comb interference and/or broadband interference; the channel model library comprises a short wave channel model, an ultrashort wave channel model, a meteor trail channel model, a covered wire channel model and the like; the channel model library specifically comprises a Gaussian white noise channel model, a short wave watterson channel model, an ultrashort wave Egli channel model, a meteor trail underdensity type channel model, a meteor trail overture type channel and a twisted pair channel model considering an ideal constant parameter channel. The simulation environment parameter control module is respectively connected with the IEMI environment library, the traditional communication interference waveform library, the transmitter and the receiver of the communication system and the effect index evaluation analysis module, and is used for communication system type selection, service receiving and transmitting control parameter configuration, channel model and communication interference model selection, strong electromagnetic environment waveform selection, response monitoring point setting and effect index evaluation analysis control; the effect index evaluation analysis module is used for evaluating and analyzing index parameters of a radio frequency receiving and transmitting channel, receiving performance and anti-interference capability of the transmitter and the receiver under the action of electromagnetic pulse; the index parameters include packet transmission success rate, data transmission rate, transmit power, and receive sensitivity. The transmitter baseband signal processing unit is communicated with the receiver baseband signal processing unit through the transmitter radio frequency channel model library, the channel model library and the receiver radio frequency channel model library in sequence; the IEMI environmental library applies strong electromagnetic environmental waveforms to the transmitter radio frequency channel model library and the receiver radio frequency channel model library; the legacy communication interference waveform library applies an electronic countermeasure waveform to a channel model library.
The invention also provides an evaluation method based on the communication system IEMI vulnerability evaluation system, namely an analysis flow of the communication system IEMI vulnerability evaluation is provided, an analysis method is provided for accurately evaluating the coupling conduction response analysis and performance degradation evaluation of the communication system under the IEMI attack, and the evaluation method specifically comprises the coupling conduction analysis of the IEMI electromagnetic interference and/or the evaluation of the influence of a key vulnerable component on the performance degradation of the communication system, wherein the two functions are software parallel and have no data intersection;
1) The coupling conduction analysis of the IEMI electromagnetic interference includes:
1.1 Selecting a communication system type, setting communication receiving and transmitting parameters, selecting a channel model from a channel model library, and selecting a communication interference model from a traditional communication interference waveform library;
1.2 Selecting a strong electromagnetic environment waveform from the IEMI library, and setting a field intensity peak value;
1.3 Setting the tail end of the antenna, an amplifier in the radio frequency channel, the front end of the band-pass filter and the rear end of the band-pass filter as response monitoring points;
1.4 The communication system carries out communication according to the set communication receiving and transmitting parameters, the channel model and the communication interference model, loads a strong electromagnetic environment waveform with a set field intensity peak value, and stores a response monitoring point waveform after the communication is finished;
1.5 Analyzing the coupling response and the communication capacity of the communication system according to the waveform data of the response monitoring points and the communication performance index data, wherein the system coupling response analysis refers to the conduction condition of electromagnetic pulses on a receiving and transmitting channel of the communication system, and the system performance index parameters comprise packet transmission success rate, data transmission rate, transmitting power and/or receiving sensitivity;
2) Taking the analysis of the coupling response of the ultrashort wave communication system HEMP as an example, as shown in fig. 4, a coupling conduction analysis method is given:
1.1 Selecting the type of a communication system as ultrashort wave communication, setting communication receiving and transmitting parameters, selecting a channel model as an Egli channel model, and selecting a communication interference model as narrow-band interference;
1.2 Selecting HEMP waveforms in an IEMI library, and setting the field intensity peak value to be 50kV/m;
1.3 Selecting a monitoring point: setting the front and back of an antenna tail end, an amplifier in a radio frequency channel and a band-pass filter as response monitoring points;
1.4 After the simulation is finished, storing response monitoring point waveforms;
1.5 According to the waveform data of the response monitoring point, the index parameters of the communication system are analyzed, wherein the index parameters comprise packet transmission success rate, data transmission rate, transmitting power and/or receiving sensitivity, fig. 5 is a simulation result screenshot of a HEMP coupling response analysis part of the ultrashort wave communication system, and according to the simulation result screenshot, the time domain waveform and the frequency domain waveform of an input/output port of a sensitive and vulnerable component LNA (normal noise amplifier) are observed, and the LNA component works in a nonlinear region to generate a saturation effect, so that the transient effect of electromagnetic pulse impact on the LNA is analyzed.
The evaluation of the performance degradation effect of the key vulnerable component on the communication system is mainly performed aiming at the effect damage component obtained in the injection test or the irradiation test, the analysis of the effect mechanism is performed, a behavior level model (namely a behavior model or a behavior level response model) after damage is established by using a polynomial method, the model is imported into the evaluation system, the effect modeling based on the vulnerable radio frequency component is obtained, and the effect evaluation of the damage component on the overall performance degradation of the communication system is performed specifically as follows:
2.1 Carrying out communication system vulnerability irradiation test or injection test on the key vulnerable assembly to obtain a damaged key vulnerable assembly;
2.2 Electrical performance testing is carried out on the damaged key vulnerable components, and an effect mechanism is carried out to detect and determine damage points; the electrical performance test includes a noise figure and/or a gain;
2.3 Using a polynomial method to construct a behavior model of the damaged critical vulnerable component, replacing normal communication system components in the communication system IEMI vulnerability assessment system with the damaged critical vulnerable component model;
2.4 Selecting a communication system, selecting a performance degradation analysis function;
2.5 Setting an evaluation index parameter; the evaluation index parameters comprise transmitting power, receiving sensitivity and/or system error rate;
2.6 Operating an IEMI vulnerability assessment system of the communication system, and storing test data;
2.7 According to the test data, the index parameters of the communication system are evaluated and analyzed.
Taking a low noise amplifier LNA frequently occurring in an ultrashort wave communication effect test as an example, as shown in fig. 4, a performance degradation analysis method for evaluating an ultrashort wave communication system under the condition of LNA damage is as follows:
2.1 Developing an ultra-short wave system vulnerability irradiation test or injection test, and acquiring a damage effect component-a Low Noise Amplifier (LNA) after the test is finished;
2.2 Performing electrical performance test on a damage effect component-Low Noise Amplifier (LNA), and performing effect mechanism detection to determine damage points; the electrical performance test includes a noise figure and/or a gain;
2.3 Using a polynomial method to construct a behavior model of a damage effect component-Low Noise Amplifier (LNA), and replacing a normal component model of the communication system with the damage effect component-Low Noise Amplifier (LNA);
2.4 Selecting an ultrashort wave system and selecting a performance degradation analysis function;
2.5 Setting an evaluation index parameter; the evaluation index parameter is the system error rate;
2.6 Operating an IEMI vulnerability assessment system of the communication system, and storing test data;
2.7 According to the test data, evaluating and analyzing the index parameters of the communication system; fig. 6 is a partial simulation result screenshot of performance degradation analysis of an ultrashort wave communication system, and it can be seen that when the LNA is damaged, the working performance of the LNA is seriously reduced, and as the signal-to-noise ratio increases, the error rate gap between the LNA and a normal LNA is gradually enlarged.
The communication system IEMI vulnerability assessment system and the assessment method can be applied to the following aspects:
1. electromagnetic energy transmission processes of electromagnetic pulses on a transceiving channel of a communication system and influences of the electromagnetic energy transmission processes on communication signals of all transceiving components are studied. Taking a radio frequency front end coupling channel as an example, the electromagnetic pulse energy conduction process can be monitored, and the input and output ports of the sensitive components on the coupling channel are monitored to respond to excitation waveforms, so that a basis is provided for the decomposition of the protection indexes.
2. Establishing a behavioral level response model of the related sensitive effect component, wherein the behavioral level response model comprises normal states, performance degradation states and damage states; taking a component with an effect in an electromagnetic pulse test of a certain actual equipment as a research object, constructing a behavior level response model capable of representing the degradation effect of the component, and replacing a normal component model in a system, so as to research the influence of component degradation on the system performance;
3. the communication capability and the anti-interference capability of a communication system with performance degradation caused by electromagnetic pulse impact in complex electromagnetic environments such as electronic countermeasure and the like are researched. The method comprises the steps of selecting a channel environment model capable of reflecting the real use topography for a standard communication system, configuring a traditional communication anti-interference waveform capable of reflecting the electronic countermeasure environment, and further researching the influence of electromagnetic pulses on the real communication capacity of the system and the anti-interference capacity of the communication system after permanent performance degradation occurs.
Finally, it should be noted that: the foregoing embodiments are merely for illustrating the technical solutions of the present invention, and not for limiting the same, and it will be apparent to those skilled in the art that modifications may be made to the specific technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the spirit of the technical solutions protected by the present invention.
Claims (5)
1. An IEMI vulnerability assessment system for a communication system, characterized by:
the system comprises a communication system, an IEMI environment library, a traditional communication interference waveform library, a channel model library, a simulation environment parameter control module and an effect index evaluation analysis module;
the communication system comprises short wave communication, ultrashort wave communication, meteor trail communication and covered wire communication; each communication consists of a transmitter and a receiver, wherein the transmitter and the receiver are composed of a baseband signal processing unit and a radio frequency channel model library;
the IEMI environmental library comprises HEMP, HPM and/or UWB-EMPs strong electromagnetic environmental waveforms;
the conventional communication interference waveform library comprises electronic countermeasure waveforms of narrow-band interference, comb interference and/or broadband interference;
the channel model library comprises a short wave channel model, an ultrashort wave channel model, a meteor trail channel model and a covered wire channel model;
the simulation environment parameter control module is respectively connected with the IEMI environment library, the traditional communication interference waveform library, the transmitter and the receiver of the communication system and the effect index evaluation analysis module, and is used for communication system type selection, service receiving and transmitting control parameter configuration, channel model and communication interference model selection, strong electromagnetic environment waveform selection, response monitoring point setting and effect index evaluation analysis control;
the effect index evaluation analysis module is used for evaluating and analyzing index parameters of a radio frequency receiving and transmitting channel, receiving performance and anti-interference capability of the transmitter and the receiver under the action of electromagnetic pulse;
the transmitter baseband signal processing unit is communicated with the receiver baseband signal processing unit through the transmitter radio frequency channel model library, the channel model library and the receiver radio frequency channel model library in sequence; the IEMI environmental library applies strong electromagnetic environmental waveforms to the transmitter radio frequency channel model library and the receiver radio frequency channel model library; the legacy communication interference waveform library applies an electronic countermeasure waveform to a channel model library.
2. The communications system IEMI vulnerability assessment system of claim 1, wherein:
the transmitter comprises a signal source generating unit, an error control coding unit, an interleaving unit, a pulse shaping unit, a modulation unit, an up-conversion unit, a frequency hopping/fixing unit and a power amplifier which are connected in sequence; the system comprises a signal source generating unit, an error control coding unit, an interleaving unit, a pulse forming unit and a modulating unit, wherein the signal source generating unit, the error control coding unit, the interleaving unit, the pulse forming unit and the modulating unit belong to a baseband signal processing unit, and an up-conversion unit, a frequency hopping/frequency fixing unit and a power amplifier belong to a radio frequency channel model library;
the receiver comprises a normal/degraded low-noise amplifier, a frequency-hopping/frequency-fixing unit, a down-conversion unit, a demodulation unit, a matched filtering unit, a de-interleaving unit, an error control decoding unit and a signal sink unit which are connected in sequence; the normal/degraded low noise amplifier, the frequency-hopping/frequency-fixing unit, the down-conversion unit and the demodulation unit belong to a radio frequency channel model library, and the matched filtering unit, the de-interleaving unit, the error control decoding unit and the information sink unit belong to a baseband signal processing unit.
3. The communications system IEMI vulnerability assessment system of claim 2, wherein:
the channel model library comprises a Gaussian white noise channel model, a short wave watterson channel model, an ultrashort wave Egli channel model, a meteor trail underdensity type channel model, a meteor trail overture type channel and a twisted pair channel model considering an ideal constant parameter channel.
4. A communications system IEMI vulnerability assessment system according to claim 3, wherein:
the index parameters include packet transmission success rate, data transmission rate, transmit power, and receive sensitivity.
5. An assessment method based on the communications system IEMI vulnerability assessment system according to any one of claims 1 to 4, characterized by:
coupled conduction analysis including IEMI electromagnetic interference and/or evaluation of the impact of critical vulnerable components on performance degradation of a communication system;
1) The coupling conduction analysis of the IEMI electromagnetic interference includes:
1.1 Selecting a communication system type, setting communication receiving and transmitting parameters, selecting a channel model from a channel model library, and selecting a communication interference model from a traditional communication interference waveform library;
1.2 Selecting a strong electromagnetic environment waveform from the IEMI library, and setting a field intensity peak value;
1.3 Setting the tail end of the antenna, an amplifier in the radio frequency channel, the front end of the band-pass filter and the rear end of the band-pass filter as response monitoring points;
1.4 The communication system carries out communication according to the set communication receiving and transmitting parameters, the channel model and the communication interference model, loads a strong electromagnetic environment waveform with a set field intensity peak value, and stores a response monitoring point waveform after the communication is finished;
1.5 Analyzing the coupling response and the communication capacity of the communication system according to the waveform data of the response monitoring points and the communication performance index data, wherein the system coupling response analysis refers to the conduction condition of electromagnetic pulses on a receiving and transmitting channel of the communication system, and the system performance index parameters comprise packet transmission success rate, data transmission rate, transmitting power and/or receiving sensitivity;
2) The evaluation of the impact of the critical vulnerable component on the performance degradation of the communication system comprises:
2.1 Carrying out communication system vulnerability irradiation test or injection test on the key vulnerable assembly to obtain a damaged key vulnerable assembly;
2.2 Electrical performance testing is carried out on the damaged key vulnerable components, and an effect mechanism is carried out to detect and determine damage points; the electrical performance test includes a noise figure and/or a gain;
2.3 Using a polynomial method to construct a behavior model of the damaged critical vulnerable component, replacing normal communication system components in the communication system IEMI vulnerability assessment system with the damaged critical vulnerable component model;
2.4 Selecting a communication system, selecting a performance degradation analysis function;
2.5 Setting an evaluation index parameter; the evaluation index parameters comprise transmitting power, receiving sensitivity and/or system error rate;
2.6 Operating an IEMI vulnerability assessment system of the communication system, and storing test data;
2.7 According to the test data, the index parameters of the communication system are evaluated and analyzed.
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| CN106656623A (en) * | 2016-12-31 | 2017-05-10 | 电子科技大学 | Performance evaluation method of ultrashort wave communication system based on multi-factor influence modeling |
| CN107360580A (en) * | 2017-07-31 | 2017-11-17 | 中国人民解放军63892部队 | A kind of ultrashort wave Wireless Telecom Equipment communication measures of effectiveness method of testing and device |
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