An engineered computational method and system for communication jamming effect equivalence

Abstract

This invention belongs to the field of simulation technology and discloses an engineering calculation method and system for equivalent communication interference effects. The system includes a natural environment configuration module, an interference equivalence simulation module, and a link connectivity calculation module. The natural environment configuration module provides natural environment parameters for the interference equivalence simulation module and the link connectivity calculation module. The interference equivalence simulation module includes three sub-modules: a sub-module for calculating the interference effect of the communication jammer, a sub-module for simulating the interference equivalence of the simulated communication jammer, and a sub-module for simulating the interference effect of the simulated communication jammer. The link connectivity calculation module includes two sub-modules: a sub-module for calculating link connectivity under normal conditions and a sub-module for calculating link connectivity under interference conditions. This invention features a more scientific calculation method, more complete consideration of factors, a more convenient calculation process, and more reliable calculation results. It can be used to guide the construction of communication interference environments and to conduct communication countermeasure training.

Description

Technical Field

[0001] This invention belongs to the field of simulation technology and relates to an engineering calculation method and system for equivalent communication interference effects. Background Technology

[0002] Interference and counter-interference have always been key concerns in the field of wireless communication. Currently, the hypothetical scenarios constructed for communication countermeasures primarily involve communication jammers implementing high-power blocking or tracking interference. During training, when actual communication jamming environments are deployed, communication jamming simulation equipment is used to simulate the jamming effects of the jammer. The equivalent simulation mainly reflects the interference frequency range, the interference power of the jamming equipment's transmitted signal reaching the communication receiver, and the jamming method (such as aiming jamming, tracking jamming, and blocking jamming). To ensure the equivalent simulation of interference effects and minimize the transmission power of the jamming signal, communication jamming simulation equipment is generally deployed close to the target location. By controlling the transmission power, the interference power of the jamming equipment's transmitted signal reaching the communication receiver is ensured to be consistent with the jamming effect of the jammer's equipment in the hypothetical scenario. The most frequently asked questions during training are: first, do the communication jamming simulation equipment reasonably and equivalently simulate the communication jamming effects of the jammer's equipment according to the hypothetical scenario? Second, how can the trainees proactively plan the use of communication countermeasures under jamming conditions, taking into account the overall situation? Regarding the equivalent calculation of interference effects, the commonly used method is to calculate the interference power of the signal transmitted by the interference equipment of the communication jammer reaching the communication receiver of the trainee using a free-space radio wave propagation model, based on the assumption of key parameters of the jammer's equipment. The simulated jammer then sets its own jamming equipment parameters based on this interference power and collects measured interference power data by setting up a spectrum analyzer near the trainee's communication receiver to ensure that the interference power reaching the trainee's receiver is basically consistent with the theoretically calculated interference effect. However, this method has four main problems: First, the free-space radio wave propagation model does not consider the influence of actual geographical environmental factors on radio wave propagation, resulting in significant differences from the actual geographical environment and large calculation errors; second, it does not consider the impact of different interference methods on interference power; third, it does not provide auxiliary calculations for the trainee's communication connectivity under both interference-free and interference-free conditions; and fourth, users lack directly usable software systems, with some using Excel spreadsheets for auxiliary calculations, resulting in poor human-computer interaction. Summary of the Invention

[0003] The purpose of this invention is to provide an engineering calculation method and system for equivalent communication interference effects, so as to solve one or more of the problems existing in the prior art, such as the single factor considered in the radio wave propagation model, the calculation method being independent of the interference mode, the weak support capability for the calculation of the passability of the participants, and the lack of available software system support.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] On the one hand, the present invention provides an engineering calculation system for equivalent communication interference effects, comprising three software modules: a natural environment configuration module, an interference equivalent simulation module, and a link connectivity calculation module.

[0006] The natural environment configuration module provides natural environment parameters for the interference equivalent simulation module and the link connectivity calculation module, supporting configuration of four parameters: terrain, climate, rainfall, and correction factor. Terrain types include four categories: flat, undulating, moderately rugged, and very rugged, corresponding to terrain coefficients of 2, 3, 4, and 5 respectively for radio wave propagation model calculations. Climate types include three categories: arid, standard, and humid, with radio wave propagation model calculations performed according to ITU-R Recommendation P.676-11 based on the climate type. Rainfall types include six categories: sunny, light rain, moderate rain, heavy rain, torrential rain, and extremely heavy rain, each representing different rainfall amounts. Users can also adjust the rainfall amount parameter according to actual conditions, within the range of [0, 100 mm / h]. Radio wave propagation loss calculations are performed according to the rainfall type or amount, referring to ITU-R Recommendation P.838-3. The correction factor is a value in the range of [-100-100 dB], used by users to perform numerical fitting corrections based on calculation results and field measurements.

[0007] The interference equivalent simulation module comprises three sub-modules: a communication jammer interference effect calculation sub-module, a simulated communication jammer interference equivalent simulation sub-module, and a simulated communication jammer interference effect calculation sub-module. The communication jammer interference effect calculation sub-module calculates the interference power of the communication jammer's interference signal reaching the receiver of the training participant's communication equipment based on the parameters of the communication jammer's jamming equipment and environmental parameters. The simulated communication jammer interference equivalent simulation sub-module, based on the calculated interference power of the communication jammer's interference signal reaching the receiver of the training participant's communication equipment, and combining the simulated communication jammer's communication interference simulation equipment parameters and environmental parameters, calculates the transmission power of the simulated communication jammer's communication interference simulation equipment when the equivalent communication jammer interference effect is simulated. The simulated communication jammer interference effect calculation sub-module calculates the interference power of the simulated communication jammer's interference signal reaching the receiver of the training participant's communication equipment based on the parameters of the simulated communication jammer's communication interference simulation equipment and environmental parameters.

[0008] Furthermore, the interference equipment parameters of the communication jammer refer to the relevant parameters of the actual jamming equipment deployed by the communication jammer on aircraft or ground jamming platforms. The communication jamming simulation equipment parameters of the simulated communication jammer refer to the relevant parameters of fixed, vehicle-mounted, and other communication jamming simulation equipment used to simulate the jamming capability of the communication jammer. Different jamming equipment adopts a unified modeling method for interference equipment parameters to manage the electromagnetic characteristics of their interference signals, while providing the initial parameters and parameter constraint ranges required for calculation. In actual calculation, users can adjust the interference equipment parameter values ​​according to the actual situation, but cannot exceed the parameter constraint range. The equipment parameters participating in the interference equivalent simulation calculation in this invention include the interference equipment parameters of the communication jammer and the communication jamming simulation equipment parameters of the simulated communication jammer. The above-mentioned equipment parameters specifically include: jamming equipment name, jamming equipment transmission power, jamming distance, jamming start frequency, jamming end frequency, jamming center frequency, jamming equipment antenna height, jamming antenna gain, frequency hopping tracking jamming signal bandwidth, comb spectrum jamming frequency interval, single comb spectrum width, frequency sweep tracking jamming signal bandwidth, jamming method, and jamming suppression coefficient.

[0009] The link connectivity calculation module comprises two sub-modules: a normal condition link connectivity calculation sub-module and an interference condition link connectivity calculation sub-module. The normal condition link connectivity calculation sub-module calculates the link connectivity between the two communication devices of the training party under interference-free conditions, based on natural environmental parameters, the parameters of the training party's communication equipment, the communication distance between the transmitters and receivers of both parties, and the transmission power of the training party's communication equipment. The interference condition link connectivity calculation sub-module calculates the link connectivity, interference-to-communication ratio, and interference-to-signal ratio between the two communication devices of the training party under interference conditions, based on natural environmental parameters, the parameters of the training party's communication equipment, the communication distance between the transmitters and receivers of both parties, the transmission power of the training party's communication equipment, the parameters of the interfering party's interference equipment, and the parameters of the simulated interference equipment.

[0010] Furthermore, the communication equipment parameters of the participating party are managed using a unified modeling method to manage the electromagnetic signal characteristics of different communication equipment. This method also provides the initial parameters and constraint ranges required for calculation. During actual calculation, users can adjust the communication equipment parameter values ​​according to the actual situation, but they cannot exceed the constraint range. The equipment parameters involved in the link connectivity calculation in this invention include: the name of the participating party's communication equipment, the transmitting power of the participating party's communication equipment, the distance between the transmitter and receiver of the participating party's communication equipment, the antenna height of the transmitter of the participating party's communication equipment, the antenna gain from the transmitter to the receiver of the participating party's communication equipment, the antenna height of the receiver of the participating party's communication equipment, the antenna gain from the receiver to the transmitter of the participating party's communication equipment, the communication start frequency of the participating party, the communication end frequency of the participating party, the center frequency of the participating party's communication equipment, the signal bandwidth of the participating party's communication equipment, the filter order, the passband ripple, the temperature correction coefficient, the receiver sensitivity, the transmission rate, the operating mode, and the frequency hopping rate, etc.

[0011] On the other hand, the present invention provides an engineering calculation method for equivalent communication interference effects, specifically including the following steps: Step 1: Initialize the basic data configuration, including the initialization of the natural environment configuration module, interference equivalent simulation module, and link connectivity calculation module.

[0012] Furthermore, step 1 includes the following sub-steps: Step 1.1: Initialize the natural environment configuration module.

[0013] The natural environment configuration module configures the following parameters: Terrain type, ranging from low to high undulation to flat, undulating, moderately rugged, and very rugged terrain. Users can select the terrain type based on their actual conditions. Climate type includes standard, dry, and humid categories, each corresponding to different atmospheric environmental parameter configurations. The module determines the corresponding atmospheric parameters based on the user-selected climate type and calculates the attenuation values ​​of radio waves under different climatic conditions using the atmospheric gas attenuation calculation method in ITU-R Recommendation P.676-11 (Radio Wave Attenuation Model in Atmosphere). Rainfall type includes six categories: sunny, light rain, moderate rain, heavy rain, torrential rain, and extremely heavy rain. The method recommended in ITU-R Recommendation P.838-3 (Radio Wave Rain Attenuation Model) can be used to calculate the radio wave propagation attenuation values ​​under different rainfall conditions. A correction factor is used to correct for propagation losses caused by the natural environment.

[0014] Step 1.2, Initialize the interference equivalent simulation module.

[0015] The interference equivalent simulation module completes the following communication jamming equipment parameter configuration: jamming equipment name, jamming equipment transmit power. ( Interference distance ( Interference start frequency ( Interference termination frequency ( Interference center frequency ( This parameter is usually filled in by the user; if the user does not fill it in, a default value will be used. ), Antenna height of jamming equipment ( Antenna gain from the jamming equipment transmitter to the trainee's communication equipment receiver. ( ), frequency hopping tracking interference signal bandwidth ( Comb-like interference frequency spacing ( ), single comb spectral width ( ), frequency sweep tracking interference signal bandwidth ( ), jamming methods (targeted jamming, broadband jamming, frequency hopping tracking jamming, frequency sweeping tracking jamming, comb spectrum jamming), jamming suppression coefficients ( ).

[0016] Step 1.3: Initialize the link connectivity calculation module.

[0017] The link connectivity calculation module configures the following parameters for the participant's communication equipment: participant's communication equipment name, participant's communication equipment transmit power. ( ), the distance between the transmitter and receiver of the communication equipment of the participating party (Unit: m) Height of the transmitter antenna of the training participant's communication equipment ( Antenna gain of the trainee's communication equipment from transmitter to receiver. ( ), height of the receiver antenna of the training participants' communication equipment ( Antenna gain of the trainee's communication equipment from receiver to transmitter. ( ), the starting frequency of communication between the training participants ( ), the frequency at which communication between the trainees ends ( ), the frequency of the communication equipment center of the training party ( This parameter is usually filled in by the user; if the user does not fill it in, a default value will be used. ), signal bandwidth of the training participants' communication equipment ( ), filter order n (recommended range: 4-8), passband ripple ( (Typically, it's set to 0-3dB; the smaller the ripple, the less the signal distortion), temperature correction factor. ( ), receiver sensitivity ( ), transmission rate ( Operating mode (fixed frequency, frequency hopping), frequency hopping rate ( There is a mapping relationship between receiver sensitivity and transmission rate; different transmission rates correspond to different receiver sensitivities.

[0018] Step 2: The interference equivalent simulation module uses the interference effect calculation submodule of the communication jammer to calculate the interference power of the interference signal of the communication jammer reaching the receiver of the training participant's communication equipment. It uses the interference equivalent simulation submodule of the simulated communication jammer to calculate the transmission power of the simulated communication jammer's communication interference simulation equipment when simulating the interference effect of the equivalent communication jammer. It also uses the interference effect calculation submodule of the simulated communication jammer to calculate the interference power of the interference signal of the simulated communication jammer reaching the receiver of the training participant's communication equipment.

[0019] Furthermore, the steps include the following sub-steps: Step 2.1, the communication interference effect calculation submodule calculates the interference power of the communication interference signal reaching the receiver of the training participant's communication equipment.

[0020] Step 2.1.1: Select the type of communication interference platform.

[0021] You can select built-in communication jamming platforms, such as aircraft and ground jamming platforms.

[0022] Step 2.1.2: Configure the equipment parameters for calculating the interference effect of the communication interference party.

[0023] Based on the type of communication jamming platform selected by the user, the jamming equipment parameters of the communication jammer configured in step 1.2 and the communication equipment parameters of the training participant configured in step 1.3 are loaded. The user adjusts the loaded parameter values ​​according to the actual equipment situation to obtain the equipment parameters used for calculating the jamming effect of the communication jammer. Specific parameters include the transmission power of the jamming equipment. ( Interference distance ( Interference start frequency ( Interference termination frequency ( Interference center frequency ( This parameter is usually filled in by the user; if the user does not fill it in, a default value will be used. ), Antenna height of jamming equipment ( Antenna gain from the jamming equipment transmitter to the trainee's communication equipment receiver. ( ), jamming methods (targeted jamming, broadband jamming, frequency hopping tracking jamming, frequency sweeping tracking jamming, comb spectrum jamming), jamming suppression coefficients ( ); Antenna height of the communication equipment receiver of the training participant ( Antenna gain from the receiver of the participant's communication equipment to the transmitter of the jamming equipment. ( ), the starting frequency of communication between the training participants ( ), the frequency at which communication between the trainees ends ( ), the frequency of the communication equipment center of the training party ( This is usually filled in by the user; if the user does not fill it in, a default value will be used. ), signal bandwidth of the training participants' communication equipment ( ), filter order n (recommended range: 4-8), passband ripple (Value range: 0–3 dB; smaller ripple indicates less signal distortion), temperature correction factor. (unit, Typical values ​​of passive filters When the manufacturer does not provide accurate data, it is recommended to take... .

[0024] Step 2.1.3: Select the propagation loss model of the interference signal radio wave from the communication interference party.

[0025] In light of practical application scenarios, this invention primarily considers radio wave propagation loss within a specific frequency band. Since practical applications mainly focus on the equivalent simulation of the interference effect on the communication interfering party, high precision is not required. Therefore, the radio wave propagation loss models selected in this invention do not require precise digital terrain elevation data; instead, engineering calculation methods are used to calculate the radio wave propagation loss. Specifically, for different application scenarios such as air-to-ground and ground-to-ground communication, this invention mainly selects seven radio wave propagation loss models, including ITU-R P.528, ITU-R P.452, free space, Log-distance PathLoss, Empirical Double Line for Ground Reflection, Egli, and Okumura_Hata, which are described in detail below.

[0026] Step 2.1.3.1: If the interference platform of the communication interference party is an aircraft, select the radio wave propagation loss model.

[0027] If the interference platform is an aircraft, the radio wave propagation is mainly air-to-ground beyond-line-of-sight propagation. Based on a comprehensive analysis of the aircraft's effective range, flight altitude, and the terrain features of the ground-based jammed receiver, and combined with the applicable frequency range and propagation mode of existing ITU radio wave propagation models, this invention recommends using two types of engineering calculation models for radio wave propagation loss: ITU-R P.528 and ITU-R P.452.

[0028] (1) ITU-R P.528 is designed for air route design in the 100MHz-30GHz range. This radio wave propagation model integrates mechanisms such as line-of-sight, diffraction, and tropospheric scattering. It is calculated based on the climate zone and time probability of the route and is suitable for calculating the radio wave propagation loss between airborne platforms and ground / airborne targets. The basic transmission loss of beyond-line-of-sight propagation caused by free space propagation and atmospheric gas attenuation is shown in Equation 1.

[0029] (1) in: The radio wave transmission loss (in dB) of the interference signal from the communication jammer to the receiver of the training participant's communication equipment. For free space loss, These are atmospheric absorption losses; their calculation methods are detailed in ITU-R Recommendation P.528-5, section 3, the step-by-step calculation method. The losses are due to diffraction and tropospheric scattering caused by topography. Where d is the distance, in km; Maximum line-of-sight distance, unit: km. , For aircraft altitude, The height of the receiver antenna; For long-term variable losses, ,in d Distance (km); f Frequency (MHz); It is the reference loss correction factor. It is the distance correction factor. Frequency correction factor; p This is a percentage of time, typically taken as 95, meaning the signal strength is higher than the average signal strength for 95% of the time. Y The value should be small, at this time A (95) = 6.8dB, B(95)= 4.2dB C (95) = 0.8 dB, which simplifies to: ; (2) ITU-R P.452 evaluated a prediction procedure for interference between radio stations on the Earth's surface at frequencies above approximately 0.1 GHz. Practical verification shows that this model is also applicable to calculating interference from aircraft to ground radar and communication equipment. This radio wave propagation model comprehensively considers propagation mechanisms such as line-of-sight propagation, diffraction effects, tropospheric scattering, and surface waves (low frequency band), and is suitable for calculating radio wave propagation loss between airborne / ground platforms and ground targets. The basic transmission loss (in dB) of line-of-sight propagation caused by free-space propagation and atmospheric gas attenuation is calculated as shown in Equation 2.

[0030] (2) in: Transmission loss (unit: dB). Center frequency (unit: GHz). Propagation distance (unit: km) The distance between the transmitting antenna and the receiving antenna (in km). A g Total gas absorption (in dB). ; The specific attenuations introduced by dry air and water vapor, respectively, can be obtained from the formulas in ITU-RP.676 Recommendation; The density of water vapor, (Unit: g / m) 3 ), where ω is the proportion of the total path that crosses the water surface.

[0031] Step 2.1.3.2: If the communication interference platform is a ground-based interference platform, select the radio wave propagation loss model.

[0032] If the interference platform is a ground-based jamming device, and the interference is carried out in the 30MHz to 1GHz frequency band, the radio wave propagation is mainly ground-to-ground line-of-sight propagation. This invention recommends using five types of engineering calculation models for radio wave propagation loss: free space, Log-distance Path Loss, ground reflection empirical bilinear model, Egli, and Okumura_Hata.

[0033] (1) Free space The free-space model has no strict frequency range requirements and is suitable for scenarios with no line-of-sight obstruction or slight obstruction. Radio wave propagation in the 30MHz–1GHz band is mainly composed of direct and ground-reflected space waves. Between 30MHz and 100MHz, the rapid attenuation at the ground surface needs to be considered, requiring correction for ground absorption loss. Between 100MHz and 1GHz, corrections for atmospheric attenuation, rainfall, terrain diffraction, and clutter need to be added. When using the free-space model to calculate radio wave propagation loss, the specific frequency band and terrain conditions should be considered when adding relevant loss effects. The formula for calculating propagation loss using the free-space model is shown in Equation 3.

[0034] (3) In the formula: The radio wave propagation loss (in dB) of the interference signal from the communication jammer to the receiver of the training participant's communication equipment. Center frequency (in MHz); Propagation distance (unit: km).

[0035] (2) Log-distance Path Loss The Log-distance Path Loss model has no strict frequency range requirements and is suitable for short-distance, line-of-sight unobstructed or slightly obstructed scenarios. This model is based on a real-world observation that, in most practical environments, the increase in average path loss is proportional to the logarithm of the transmission distance. In actual calculations, considering the shadowing effect of obstacles, a random shadowing fading factor needs to be added. The engineered average path loss of Log-distance Path Loss is shown in Equation 4.

[0036] (4) in, For reference distance, it is usually determined by measurement or free space model (usually 100m is taken in combination with the actual application scenario of jamming equipment). To be at the reference distance The path loss at the location; λ is the signal wavelength; n is the path loss exponent, with values ​​shown in Table 1, reflecting the degree of signal attenuation caused by the environment; d is the actual distance between the transmitter and receiver ( ); The shadow fading term reflects the random fluctuations in the signal caused by obstructions (buildings, trees, etc.). It is a random variable that follows a zero-mean Gaussian distribution with a standard deviation of σ (in dB), typically between 6 dB and 12 dB.

[0037] Table 1. Explanation of the values ​​of the path loss exponent n

[0038] (3) Empirical bilinear model of ground reflection The empirical bilinear model for ground reflection recommends a frequency band of 150MHz to 3GHz, suitable for short to medium line-of-sight scenarios. Its core calculation logic ignores the influence of surface waves, considering only direct and reflected waves, and its applicable distances extend beyond the first Fresnel zone. ;in, When using this model in practice, it is recommended to use the actual distance. Only in this way can other clutter interference be ignored, ensuring the accuracy of model predictions. The propagation loss formula for the empirical two-line transmission loss model of ground reflection is shown in Equation 5: (5) Where n is the terrain influence factor, and its values ​​and applicable scenarios are shown in Table 2; d is the transmission distance (km); The transmitter antenna height (m); The transmitter antenna height is in meters (m).

[0039] Table 2 Explanation of the values ​​of topographic influence factor n

[0040] (4) Egli model The Egli model recommends a frequency band of 40MHz to 1GHz, with a core applicable frequency band of 40MHz to 400MHz. It recommends a distance of 1km to 64.4km between the transmitter and receiver and is suitable for calculating the propagation loss of outdoor radio waves in gently sloping, irregular terrain. However, it is not suitable for rugged mountainous areas, areas with significant obstacles, or densely built-up areas. The engineering calculation formula for the Egli model is shown in Equation 6.

[0041] The propagation loss in the Egli propagation model for irregular terrain is shown in Equation 6.

[0042] (6) In the formula, n is the terrain influence factor; d is the transmission distance (unit: m). Center frequency (in MHz); The heights of the transmitting and receiving antennas are shown in meters (m).

[0043] (5) Okumura_Hata model Based on extensive measurement data from Okumura in Tokyo, formulated by Hata. Frequency 150-1500 MHz; distance 1-20 km; antenna height 30-200m for base stations, 1-10m for terminals; environment: large cities, suburbs, rural areas (with different correction factors).

[0044] The Okumura-Hata model is characterized by using the median transmission loss of a quasi-flat large urban area as a standard, and then correcting for other propagation environment and terrain conditions using appropriate factors. This empirical formula was adopted by the International Radio Consultative Committee. The Okumura-Hata propagation loss formula (dB) is shown in Equation 7.

[0045] (7) In the formula: The distance between the transmitting and receiving antennas (unit: km); The center frequency of the carrier (unit: MHz); Equivalent height of the transmitter (in meters); The receiver antenna height (in meters). The correction factor for the receiver antenna, i.e., the mobile antenna, is determined by factors such as the density and height of buildings in the propagation environment; This is a region type correction factor.

[0046] For different environment types and different working frequencies, and Calculation formula:

[0047] .

[0048] Step 2.1.4: Calculate the radio wave propagation loss value of the interference signal from the communication jammer reaching the receiver of the training participant's communication equipment. Specifically, substitute the parameters of the communication jammer's equipment configured in Step 2.1.2 into the radio wave propagation loss calculation formula of the radio wave propagation loss model of the communication jammer's interference signal selected in Step 2.1.3 to calculate the radio wave propagation loss value of the interference signal from the communication jammer reaching the receiver of the training participant's communication equipment. .

[0049] Step 2.1.5: Calculate the total filter loss of the interference signal from the communication jammer reaching the receiver of the training participant's communication equipment, based on the jamming method of the communication jammer. The jamming methods are divided into five types: aiming jamming, broadband blocking jamming, frequency hopping tracking jamming, frequency sweeping tracking jamming, and comb spectrum jamming.

[0050] Step 2.1.5.1, Calculation of total filter loss for targeted interference.

[0051] If the jamming method is targeted jamming, the specific calculation process is as follows: (1) Calculate the frequency offset: ,in; For frequency offset, To interfere with the transmission frequency, For communication receiving frequency; (2) Normalized frequency offset: ,in: The normalized frequency offset For communication signal bandwidth; (3) Calculate the nth order Chebyshev polynomial Chebyshev polynomial recurrence formula: , , Thus, we obtain , , , , ; (4) Calculate the filter loss:

[0052]

[0053] in: Filter loss (unit: dB). Ripple coefficient Passband ripple (unit: dB). It is a Chebyshev polynomial; (5) Calculate the temperature loss: ,in: For temperature loss, t The current ambient temperature. This is the temperature coefficient (unit: dB / °C), to be filled in by the user based on the actual situation; (6) Calculate the filter insertion loss: , It is the power ratio (in dB) obtained at the load end before and after the filter is connected, reflecting the inherent attenuation of the passband signal by the filter. Ideal filter =0dB, the actual passive filter IL value usually ranges from 0.1 to 3dB, and is filled in by the user in conjunction with the data provided by the manufacturer. The default value is 0.2dB; (7) Calculate the total loss of the filter: ,in: This represents the total loss of the filter. For filter loss, For temperature loss, This represents the filter insertion loss.

[0054] Step 2.1.5.2, Calculate the total filter loss for frequency hopping tracking interference.

[0055] If the jamming method is frequency hopping tracking jamming, the jammer can detect and analyze the communication signal in real time and quickly align its jamming frequency with (track) the communication's operating frequency; total filter loss The calculation formula is:

[0056] in, To track the bandwidth of the interference signal by frequency hopping, Frequency hopping tracking jamming typically uses twice the communication signal bandwidth, which is the bandwidth of the communication signal. For filter loss, For temperature loss, The filter insertion loss is calculated in step 2.1.5.1.

[0057] Step 2.1.5.3, calculate the total filter loss for frequency sweeping and tracking interference.

[0058] If the jamming method is frequency sweeping and tracking jamming, the jammer rapidly sweeps within a preset frequency band. Once a communication signal is detected at a certain frequency, it can immediately lock onto and track that frequency, concentrating powerful jamming energy there to disrupt normal communication. The jamming may continue for a period of time, or until the communication signal disappears, after which the jammer may resume frequency sweeping to find the next target; total filter loss... The calculation formula is:

[0059] in, To sweep the bandwidth of the interference signal, For communication signal bandwidth, For filter loss, For temperature loss, The filter insertion loss is calculated in step 2.1.5.1.

[0060] Step 2.1.5.4, Total filter loss due to broadband blocking interference calculate.

[0061] If the interference method is broadband blocking interference, it is also necessary to calculate the average filter loss within the interference bandwidth. This invention uses the discrete sampling method commonly used in engineering to perform engineering calculations on the filter loss under broadband interference mode. The specific process is as follows: (1) Determine the number of frequency points to be used N Number of frequency points used in broadband jamming interference: ,in: For broadband blocking interference signal bandwidth, For communication signal bandwidth; (2) According to step 2.1.5.1, the filter loss The calculation formula yields the filter loss correction value at the nth frequency point. and temperature loss Filter insertion loss ; (3) Calculate the final filter loss : ; (4) Calculate the total filter loss:

[0062] in, The final filtering loss due to broadband blocking interference. For temperature loss, This represents the filter insertion loss.

[0063] Step 2.1.5.5, Total filter loss for comb-spectrum interference calculate.

[0064] (1) Determine the number of frequency points N to be used: The number of frequency points used for comb-spectrum interference: ,in: The frequency at which interference ends. For the interference start frequency, The frequency interval of the comb spectrum.

[0065] (2) Calculate the filter loss correction value for each frequency point according to step 2.1.5.1. and temperature loss Filter insertion loss .

[0066] (3) Calculate the final filter loss according to step 2.1.5.4. .

[0067] (4) Calculate the total loss of the filter :

[0068] in, For the width of a single comb-shaped spectrum, For communication signal bandwidth, For comb-spectrum filtering loss, For temperature loss, This represents the filter insertion loss.

[0069] Step 2.1.6: Calculate the interference power of the interference signal from the interfering party reaching the receiver of the training participant's communication equipment. .

[0070] The calculation formula is as follows: (8) In the formula: The interference power of the interference signal from the interfering party reaching the receiver of the training participant's communication equipment is expressed in dBm. The transmission power of the jamming equipment is expressed in dBm. Antenna gain from the jamming equipment transmitter to the receiving equipment of the training participant's communication equipment, expressed in dBi. Antenna gain from the receiver of the participant's communication equipment to the transmitter of the jamming equipment, in dBi. The radio wave propagation loss of the interference signal from the communication interfering party to the receiver of the communication equipment of the training party is expressed in dB. The calculation method is shown in step 2.1.4. The total filter loss of the interference signal reaching the receiver of the participant's communication equipment, expressed in dB. The calculation should distinguish between different interference methods. For specific calculation steps, see 2.1.5.

[0071] Step 2.2: When the equivalent simulation submodule for simulated communication interference calculates the equivalent simulated communication interference effect, the transmission power of the simulated communication interference equipment is used.

[0072] Given the interference power of the interference signal from the interfering party, calculated in step 2.1.6, reaching the receiver of the training participant's communication equipment. Calculate the equivalent interference power of the simulated communication jammer using ground-based jamming equipment, assuming the ground-based jamming equipment has the same interference distance and other interference parameters as the ground-based jamming equipment of the simulated communication jammer. Time (i.e., the interference power of the interference signal from the ground equipment of the simulated communication jammer reaching the receiver of the communication equipment of the training participant) ), the transmission power of the communication jamming simulation equipment. The specific calculation process is as follows: Step 2.2.1: Select the type of interference platform for the simulated communication interference.

[0073] The system allows users to select the type of analog communication jamming platform built into the system, such as fixed, vehicle-mounted, portable, or ground-based distributed jamming.

[0074] Step 2.2.2: Configure the equipment parameters for the simulation calculation of interference equivalent of the simulated communication interference party.

[0075] Extract the initial parameters from the jamming equipment corresponding to the selected simulated communication jamming platform type. Users can then configure these parameters according to their specific needs. Specific parameters include the transmit power of the jamming equipment from the simulated communication jammer. Interference distance Interference start frequency Interference termination frequency Interference center frequency (unit, This parameter is usually filled in by the user; if the user does not fill it in, a default value will be used. ), Antenna height of jamming equipment Antenna gain from the jamming equipment transmitter to the trainee's communication equipment receiver. Frequency hopping tracking interference signal bandwidth Comb-like interference frequency spacing Single comb spectral width Frequency sweep tracking interference signal bandwidth Interference methods (targeted jamming, broadband jamming, frequency hopping tracking jamming, frequency sweeping tracking jamming, comb-spectrum jamming); antenna height of the participant's communication equipment receiver. Antenna gain from the receiver of the participant's communication equipment to the transmitter of the jamming equipment. The starting frequency of communication between the training participants Frequency at which communication between trainees ends , Frequency of the Communication Equipment Center of the Participating Party (Unit: MHz. To be filled in by the user; default value will be used if not filled in by the user.) ), signal bandwidth of the training participants' communication equipment Filter order n (recommended value range: 4-8), passband ripple (Value range: 0–3 dB; smaller ripple indicates less signal distortion), temperature correction factor. (unit, Typical values ​​of passive filters When the manufacturer does not provide accurate data, it is recommended to take... ).

[0076] Step 2.2.3: Select the simulation communication interference signal radio wave propagation loss model.

[0077] In practical application scenarios, the communication interference simulation equipment of the communication interference party is usually deployed on the ground. When selecting the radio wave propagation loss model, the ground interference equipment of the communication interference party is referenced, and the specific method is the same as that in step 2.1.3.2.

[0078] Step 2.2.4: Calculate the radio wave propagation loss value of the simulated communication interference signal reaching the receiver of the training participant's communication equipment. The method is the same as in step 2.1.4, that is, substitute the parameters configured in step 2.2.2 into the radio wave propagation loss model of the simulated communication interference signal selected in step 2.2.3 to calculate the result.

[0079] Step 2.2.5: Calculate the total filter loss of the simulated communication interference signal reaching the receiver of the training participant's communication equipment, using the same method as in step 2.1.5.

[0080] Step 2.2.6: Calculate the transmission power of the communication interference simulation equipment of the simulated communication jammer when calculating the equivalent simulated communication jamming effect.

[0081] Given the interference power of the interference signal from the communication interfering party, calculated in step 2.1.6, reaching the receiver of the communication equipment of the training participant. Calculate the transmission power of ground-based jamming equipment used by the simulated communication jammer. As can be seen from Equation 8, (9) From Equation 9, we can obtain that (10) in, To simulate the transmission power of ground jamming equipment used by a communications jammer; The interference power of the interference signal from the communication interfering party, calculated in step 2.1.6, reaches the receiver of the communication equipment of the training party. Antenna gain in the direction from the transmitter of the ground jamming equipment of the communication jammer to the receiver of the communication equipment of the trainee; Antenna gain from the receiver of the training party's communication equipment to the transmitter of the ground jamming equipment of the simulated communication jammer; To simulate the radio wave propagation loss from the ground jamming equipment of the communication jammer to the receiver of the communication equipment of the trainee. This is to simulate the total filter loss of the communication equipment receiver of the training participant when the interference signal from the ground jamming equipment of the communication jammer enters the receiver.

[0082] Step 2.3, the simulated communication jammer interference effect calculation submodule calculates the interference power of the simulated communication jammer's interference signal reaching the receiver of the participant's communication equipment. The specific calculation process is as follows: Step 2.3.1: Select the type of interference platform for the simulated communication interference.

[0083] The system allows users to select the type of analog communication jamming platform built into the system, such as fixed, vehicle-mounted, portable, or ground-based distributed jamming.

[0084] Step 2.3.2: Configure the equipment parameters for calculating the interference effect of the simulated communication jammer.

[0085] Extract the initial parameters from the jamming equipment corresponding to the selected simulated communication jamming platform type. The user then configures these parameters according to the actual situation. The specific parameters are the same as in step 2.2.2, including the jamming equipment's transmit power. Interference distance Interference start frequency Interference termination frequency Interference center frequency (This is usually filled in by the user; if the user does not fill it in, the system will automatically fill in the default value.) ) , Antenna height of jamming equipment Antenna gain from the jamming equipment transmitter to the trainee's communication equipment receiver. Frequency hopping tracking interference signal bandwidth Comb-like interference frequency spacing Single comb spectral width Frequency sweep tracking interference signal bandwidth Interference methods (targeted jamming, broadband jamming, frequency hopping tracking jamming, frequency sweeping tracking jamming, comb-spectrum jamming); antenna height of the participant's communication equipment receiver. Antenna gain from the receiver of the participant's communication equipment to the transmitter of the jamming equipment. The starting frequency of communication between the training participants Frequency at which communication between trainees ends , Frequency of the Communication Equipment Center of the Participating Party (This is usually filled in by the user; if the user does not fill it in, the system will automatically fill in the default value.) ), signal bandwidth of the training participants' communication equipment Filter order n (recommended value range: 4-8), passband ripple (Value range: 0–3 dB; smaller ripple indicates less signal distortion), temperature correction factor. (unit, Typical values ​​of passive filters ).

[0086] Step 2.3.3: Select the simulation communication interference signal radio wave propagation loss model.

[0087] In practical application scenarios, the communication interference simulation equipment of the communication interference party is usually deployed on the ground. When selecting the radio wave propagation loss model, the ground interference equipment of the communication interference party is referenced, and the specific method is the same as that in step 2.1.3.2.

[0088] Step 2.3.4: Calculate the radio wave propagation loss value of the simulated communication interference signal reaching the receiver of the participant's communication equipment. The method is the same as in step 2.1.4.

[0089] Step 2.3.5: Calculate the total filter loss of the simulated communication interference signal reaching the receiver of the trainee's communication equipment, using the same method as in step 2.1.5.

[0090] Step 2.3.6: Calculate the interference power of the simulated communication interference signal reaching the receiver of the participant's communication equipment. .

[0091] The interference power of the simulated communication jammer's signal reaching the receiver of the trainee's communication equipment. The calculation method is shown in Equation 11: (11) in, The interference power of the interference signal from the communication jammer reaching the receiver of the training participant's communication equipment is measured in dBm. The transmission power of ground jamming equipment used by the simulated communication jammer is expressed in dBm. Antenna gain from the jamming equipment transmitter to the receiving equipment of the training participant's communication equipment, expressed in dBi. Antenna gain from the receiver of the participant's communication equipment to the transmitter of the jamming equipment, in dBi. To simulate the radio wave propagation loss of the interference signal from the communication jammer reaching the receiver of the training participant's communication equipment, the unit is dB. The calculation method is shown in step 2.1.4. The filtering loss of the interference signal reaching the receiver of the communication equipment of the training participant is expressed in dB. The specific calculation steps are shown in 2.1.5.

[0092] Step 3: The link connectivity calculation module uses the link connectivity submodule under normal conditions to calculate the link connectivity between the two communication devices of the trainee when there is no interference signal. Under interference conditions, the link connectivity submodule calculates the link connectivity, interference-to-connection ratio, and interference-to-signal ratio between the two communication devices of the trainee when there is interference.

[0093] Furthermore, step 3 includes the following sub-steps: Step 3.1: Under normal conditions, the link connectivity submodule calculates the link connectivity between the two communication devices of the training participants when there is no interference signal.

[0094] Step 3.1.1: Select the type of communication equipment of the trainee.

[0095] The available types of communication equipment for trainees are derived from the system's built-in communication equipment for trainees.

[0096] Step 3.1.2: Configure the specific parameters of the communication equipment of the participants.

[0097] Extract the initial parameters from the communication equipment corresponding to the selected participant's communication equipment type. Users can then modify these parameters according to their specific needs. Specific parameters include the participant's communication equipment name and transmission power. Height of the transmitter antenna of the participating party's communication equipment Antenna gain of the participating party's communication equipment in the direction from transmitter to receiver Height of the receiver antenna of the training participant's communication equipment Antenna gain of the trainee's communication equipment from receiver to transmitter. Distance between the transmitter and receiver of the training participants' communication equipment (Unit: km), Starting frequency of communication by the training participants Frequency at which communication between trainees ends , Frequency of the Communication Equipment Center of the Participating Party (This parameter is usually filled in by the user; if the user does not fill it in, the default value will be used.) ), signal bandwidth of the training participants' communication equipment Filter order n (recommended value range: 4-8), passband ripple (Value range: 0–3 dB; smaller ripple indicates less signal distortion), temperature correction factor. (Typical value of passive filter) ), receiver sensitivity Transmission rate Operating mode (fixed frequency, frequency hopping), frequency hopping rate Receiver sensitivity With transmission rate There is a mapping relationship between the operating modes (fixed frequency, frequency hopping), and the receiver sensitivity varies under different operating modes and transmission rates.

[0098] Step 3.1.3: Select the radio wave propagation loss model for the communication signal of the training participants.

[0099] In practical application scenarios, the communication equipment of the participants is usually deployed on the ground. When selecting the radio wave propagation loss model, the ground-based jamming equipment of the communication jammer is referenced, and the specific method is the same as that in step 2.1.3.2.

[0100] Step 3.1.4: Calculate the radio wave propagation loss from the transmitter of the participant's communication equipment to the receiver of the participant's communication equipment. .

[0101] Specifically, following the same method as in step 2.1.4, and using the communication equipment parameters configured in 3.1.2, the radio wave propagation loss value from the transmitter signal of the participant's communication equipment to the receiver of the participant's communication equipment is calculated. .

[0102] Step 3.1.5: Calculate the communication signal power from the transmitter of the participant's communication equipment to the receiver of the participant's communication equipment. .

[0103] Calculate the communication signal power from the transmitter of the trainee's communication equipment to the receiver of the trainee's communication equipment, referring to the calculation method in Equation 8. In practical applications, the transmitters and receivers of the training participants' communication equipment use the same frequency, so filtering loss is not considered. The calculation method is shown in Equation 12: (12) in, The communication signal power from the transmitter of the trainee's communication equipment to the receiver of the trainee's communication equipment; The transmission power of the communication equipment of the participating party; Antenna gain from transmitter to receiver of the communication equipment of the participating party; Antenna gain from the receiver of the training participant's communication equipment to the transmitter of the training participant. The radio wave propagation loss from the transmitter of the training participant's communication equipment to the receiver of the training participant's communication equipment.

[0104] Step 3.1.6: Calculate the link connectivity between the two communication devices of the training participants when there is no interference signal.

[0105] Link connectivity between the transmitter and receiver of the trainee's communication equipment The method for determining this is shown in Equation 13: (13) Step 3.2, under interference conditions, the link connectivity calculation submodule calculates the link connectivity, interference-to-communication ratio, and interference-to-signal ratio between the two communication devices of the participating parties when interference is present.

[0106] Step 3.2.1, select the interference platform type.

[0107] The selectable jamming platform types are derived from the system's built-in communication jamming platform and simulated communication jamming platform.

[0108] Step 3.2.2: Configure the specific parameters of the jamming equipment.

[0109] The system automatically extracts the initial parameters from the jamming equipment corresponding to the selected jamming platform type. Users can then modify these parameters according to the actual situation. Specific parameters include the jamming equipment's transmit power. Interference distance Interference start frequency Interference termination frequency Interference center frequency (This parameter is usually filled in by the user; if the user does not fill it in, the default value will be used.) ), Antenna height of jamming equipment Antenna gain from the jamming equipment transmitter to the trainee's communication equipment receiver. Frequency hopping tracking interference signal bandwidth Comb-like interference frequency spacing Single comb spectral width Frequency sweep tracking interference signal bandwidth Jamming methods (targeted jamming, broadband jamming, frequency hopping tracking jamming, frequency sweeping tracking jamming, comb-spectrum jamming), jamming suppression coefficients (Unit: dB, range of values ​​is) ).

[0110] Step 3.2.3: Select the type of communication equipment of the trainee.

[0111] The available types of communication equipment for trainees are derived from the system's built-in communication equipment for trainees.

[0112] Step 3.2.4: Configure the specific parameters of the communication equipment of the participants.

[0113] The system automatically extracts the initial parameters from the communication equipment corresponding to the selected training participant's communication equipment type. Users can modify the relevant parameters according to the actual situation. For specific parameters, please refer to 3.1.2.

[0114] Step 3.2.5: Select the interference signal wave propagation loss model.

[0115] Following the method in step 2.1.3, the user selects an interference signal wave propagation loss model.

[0116] Step 3.2.6: Calculate the radio wave propagation loss value of the interference signal reaching the receiver of the communication equipment of the training participant.

[0117] Following the method in step 2.1.4, and using the interference equipment parameters configured in step 3.2.2 and the communication equipment parameters of the trainee configured in step 3.2.4, calculate the radio wave propagation loss value of the interference signal reaching the receiver of the trainee's communication equipment.

[0118] Step 3.2.7: Calculate the total filter loss value of the interference signal reaching the receiver of the communication equipment of the training participant.

[0119] Following the method in step 2.1.5, and using the interference equipment parameters configured in step 3.2.2 and the participant's communication equipment parameters configured in step 3.2.4, calculate the filtering loss value of the interference signal reaching the receiver of the participant's communication equipment.

[0120] Step 3.2.8: Calculate the interference power of the interference signal reaching the receiver of the participant's communication equipment. .

[0121] Following the method in step 2.1.6, and using the jamming equipment parameters configured in step 3.2.2 and the participant's communication equipment parameters configured in step 3.2.4, calculate the interference power of the jamming signal reaching the receiver of the participant's communication equipment. .

[0122] Step 3.2.9: Select the radio wave propagation loss model for the communication signal of the training participants.

[0123] In step 3.1.3, the user selects a communication signal wave propagation loss model for the training participants.

[0124] Step 3.2.10: Calculate the radio wave propagation loss value from the transmitter signal of the trainee's communication equipment to the receiver of the trainee's communication equipment.

[0125] Following the method in step 2.1.4, and using the communication equipment parameters of the trainee configured in 3.2.4, calculate the radio wave propagation loss value from the transmitter signal of the trainee's communication equipment to the receiver of the trainee's communication equipment. .

[0126] Step 3.2.11: Calculate the communication signal power from the transmitter of the participant's communication equipment to the receiver of the participant's communication equipment. .

[0127] Following the method in step 3.1.5, and using the communication equipment parameters of the trainee configured in 3.2.4, calculate the communication signal power from the transmitter signal of the trainee's communication equipment to the receiver of the trainee's communication equipment. .

[0128] Step 3.2.12: Calculate the link connectivity between the transmitter and receiver of the trainee's communication equipment under interference conditions.

[0129] Communication compatibility between the trainee's communication equipment transmitter and receiver The determination method is shown in Equation 14: (14) The interference power of the interference signal reaching the receiver of the communication equipment of the training participant; The signal power of the communication signal from the transmitter of the training equipment to the receiver of the training equipment is denoted as k, where k is the interference suppression coefficient.

[0130] Step 3.2.13, calculate the dry-to-through ratio. And dry letter ratio .

[0131] / (15) Interference distance, This refers to the distance between the transmitter and receiver of the communication equipment used by the participating party.

[0132] (16) The interference power of the interference signal from the interfering party reaching the receiver of the communication equipment of the training participant; The power of the communication signal from the transmitter of the training equipment to the receiver of the training equipment.

[0133] Compared with the prior art, the technical effects of the present invention are as follows: This invention, combined with practical application scenarios, targets communication countermeasure training scenarios within a specific frequency band. It selects and determines seven radio wave propagation models and utilizes techniques such as natural environment modeling, electromagnetic equipment modeling, and radio wave propagation modeling to design an engineering calculation method and system for equivalent communication interference effects. This provides an engineering calculation method and system for calculating the interference effects of the interfering party, simulating equivalent interference effects, calculating the interference effects of the simulated interfering party, and assessing the accessibility of the trainees' communication equipment under both interference-free and interference-free conditions. The method features more scientific calculation methods, more comprehensive consideration of factors, more convenient calculation processes, and more reliable calculation results. It can be used to guide the construction of communication interference environments and the conduct of communication countermeasure training. Attached Figure Description

[0134] Figure 1 This is a schematic diagram of an engineering calculation system for the equivalent communication interference effect of the present invention. Detailed Implementation

[0135] The invention will be further described below with reference to the accompanying drawings.

[0136] Example 1: like Figure 1 As shown, this embodiment provides a three-module equivalent calculation of communication interference effects: a natural environment configuration module 1, an interference equivalent simulation module 2, and a link connectivity calculation module 3. The interference equivalent simulation module 2 includes a communication interference effect calculation submodule 21, a simulated communication interference effect simulation submodule 22, and a simulated communication interference effect calculation submodule 23. The link connectivity calculation module 3 includes a link connectivity calculation submodule 31 under normal conditions and a link connectivity calculation submodule 32 under interference conditions. Data exchange between the software modules is achieved through a pre-defined JSON interface. The data exchange relationships between the modules are as follows: a1: The data exchange content between the natural environment configuration module 1 and the interference equivalent simulation module 2 includes four data items: terrain, climate, rainfall, and correction factor; a2: The data exchange content between the natural environment configuration module 1 and the link connectivity calculation module 2 includes four data items: terrain, climate, rainfall, and correction factor; b: The data exchange content between the communication jammer interference effect calculation submodule 21 and the simulated communication jammer interference equivalent simulation submodule 22 is the interference signal power at the receiving point; c: The data exchange content between the link connectivity calculation submodule 31 under normal conditions and the link connectivity calculation submodule 32 under interference conditions is the power of the receiving point communication signal; Example 2: This embodiment presents the filter total loss calculation process, calculating the total filter loss of the interfering signal reaching the receiver of the participant's communication equipment based on different interference methods. Specifically, it divides the interference into five different methods: targeted jamming, broadband jamming, frequency hopping tracking jamming, frequency sweeping tracking jamming, and comb spectrum jamming. The loss calculation method differs for each interference method, and the specific steps are as follows: Step 1: Calculate the total loss of the targeting / frequency hopping tracking / frequency sweeping tracking interference filter.

[0137] Step 1.1 Calculate frequency offset ,in; To interfere with the transmission frequency, For communication receiving frequency; Step 1.2 Normalized frequency offset: , For communication signal bandwidth; Step 1.3 Calculate the nth-order Chebyshev polynomial .

[0138] Chebyshev polynomial recurrence formula: , , Thus, we obtain , , , , .

[0139] Step 1.4 Calculate the filter loss .

[0140]

[0141]

[0142] in Ripple coefficient Passband ripple (unit: dB) It is a Chebyshev polynomial.

[0143] Step 1.5 Calculate temperature loss ,t is the current ambient temperature, This is the temperature coefficient (dB / °C).

[0144] Step 1.6 Calculate the filter insertion loss: , It is the power ratio (in dB) obtained at the load end before and after the filter is connected, reflecting the inherent attenuation of the passband signal by the filter. Ideal filter =0dB. The actual passive filter IL value usually ranges from 0.1 to 3dB, and is filled in by the user in conjunction with the data provided by the manufacturer. The default value is 0.2dB.

[0145] Step 1.7 Calculate the total filter loss .

[0146] For targeted interference, the total filter loss... .in, For filter loss, For temperature loss, This represents the filter insertion loss.

[0147] If the interference is frequency hopping tracking or frequency sweep tracking, the total filter loss will be... .in, For frequency hopping tracking or frequency sweep tracking of interference signal bandwidth, Frequency hopping tracking jamming typically uses twice the communication signal bandwidth, which is the bandwidth of the communication signal.

[0148] Step 2: Calculation of total loss of broadband blocking / comb spectrum interference filter.

[0149] Step 2.1 Determine the number of frequency points N to be used.

[0150] If the interference is broadband congestion, use the number of frequency points. , For broadband blocking interference signal bandwidth, This refers to the bandwidth of the communication signal.

[0151] If it is comb-like interference, use the number of frequency points. ,in The frequency at which interference ends. For the interference start frequency, The frequency interval of the comb spectrum.

[0152] Step 2.2 Calculate the filter loss correction value for each point. For the calculation method, please refer to steps 1.1-1.4 in step 1.

[0153] Step 2.3 calculates the average to obtain the final filter loss value. .

[0154] Step 2.4 Calculate temperature loss and filter insertion loss The calculation method is described in steps 1.5-1.6 of step 1.

[0155] Step 2.5 Calculate the total filter loss .

[0156] For broadband blocking interference, the total filter loss is: .in, For broadband blocking filter loss, For temperature loss, This represents the filter insertion loss.

[0157] If it is comb-spectrum interference, the total filter loss .in, For the width of a single comb-shaped spectrum, For communication signal bandwidth, For comb-spectrum filtering loss, For temperature loss, This represents the filter insertion loss.

[0158] Example 3: This embodiment provides the calculation process for each sub-module in the interference equivalent simulation module 2 and the link connectivity calculation module 3.

[0159] The communication interference effect calculation submodule 21 calculates the interference power of the communication interference signal reaching the receiver of the training participant's communication equipment based on the parameters of the communication interference equipment and the natural environment. The specific steps are as follows: Step 1: Select the type of communication interference platform.

[0160] The system incorporates different types of jamming platforms, including aircraft and ground-based jammers, with varying initial parameters and parameter constraints for each platform type.

[0161] Step 2: Configure the specific parameters of the jamming equipment of the communication jammer and the communication equipment of the trainee.

[0162] The system automatically extracts the initial parameters of the jamming equipment corresponding to the selected communication jamming platform type, and loads the initial parameters of the training participants' communication equipment. Users can modify the relevant parameters according to the actual situation.

[0163] Step 3: Select the communication interference signal radio wave propagation loss model.

[0164] When the selected jamming platform type is an aircraft, the radio wave propagation is mainly air-to-ground beyond-line-of-sight propagation. Based on a comprehensive analysis of the aircraft's effective range, flight altitude, and the terrain features of the ground-based jammed receiver, and combined with the applicable frequency range and propagation mode of the existing ITU radio wave propagation models, the system recommends using two types of engineering calculation models for radio wave propagation loss: ITU-R P.528 and ITU-R P.452.

[0165] When the selected jamming platform type is ground jamming equipment, radio wave propagation is mainly ground-to-ground line-of-sight propagation. The system recommends using five types of engineering calculation models for radio wave propagation loss: free space, Log-distance Path Loss, ground reflection empirical bilinearity, Egli, and Okumura_Hata.

[0166] Step 4: Calculate the radio wave propagation loss PL(d).

[0167] Calculate the corresponding transmission loss PL(d) in dB based on different radio wave propagation models.

[0168] Step 5: Calculate the total filter loss .

[0169] The total filter loss of the interference signal from the interfering party reaching the receiver of the training participant's communication equipment is calculated. The interference is categorized into five different types based on its mode: targeted interference, broadband blocking interference, frequency hopping tracking interference, frequency sweeping tracking interference, and comb-spectrum interference. Following the calculation method in step 2.1.5, the following is obtained: .

[0170] Step 6: Calculate the power of the interference signal from the interfering party reaching the receiving point of the training participant's communication equipment. .

[0171]

[0172] in The interference power of the interference signal from the interfering party reaching the receiver of the training party's communication equipment, expressed in dBm. The transmission power of the jamming equipment is expressed in dBm. Antenna gain from the jamming equipment transmitter to the receiving equipment of the training participant's communication equipment, expressed in dBi. Antenna gain from the receiver of the participant's communication equipment to the transmitter of the jamming equipment, in dBi. The radio wave propagation loss of the interference signal from the communication interfering party to the receiver of the communication equipment of the training party is expressed in dB. The calculation method is shown in step 2.1.4. The filtering loss of the interference signal reaching the receiver of the communication equipment of the training participant is expressed in dB. The calculation method is shown in step 2.1.5.

[0173] The simulated communication jammer interference equivalent simulation submodule 22, based on the interference power calculation results of the interference signal from the communication jammer reaching the receiver of the training participant's communication equipment, and combined with the parameters of the simulated communication jammer's communication interference simulation equipment and natural environment parameters, calculates the interference transmission power that should be set when using the simulated communication jammer's communication interference simulation equipment to equivalently simulate the interference effect of the communication jammer, given the known interference distance. The specific steps are as follows: Step 1: Select the type of communication jamming platform to simulate communication interference.

[0174] The system incorporates four types of simulated communication jamming platforms: fixed, vehicle-mounted, portable, and ground-distributed. The initial parameters and parameter constraints differ for each type of jamming platform.

[0175] Step 2: Configure the specific parameters of the communication interference simulation equipment of the simulated communication jammer and the communication equipment of the trainee.

[0176] The system automatically extracts the initial parameters of the jamming equipment corresponding to the selected simulated communication jamming platform type, and loads the initial parameters of the training participants' communication equipment. Users can modify the relevant parameters according to the actual situation.

[0177] Step 3: Select the simulation communication interference signal radio wave propagation loss model.

[0178] In practical application scenarios, communication interference simulation equipment for the communication interference party is usually deployed on the ground. When selecting the radio wave propagation loss model, referring to the ground interference equipment of the communication interference party, radio wave propagation is mainly based on ground-to-ground line-of-sight propagation. The system recommends using five types of engineering calculation models for radio wave propagation loss: free space, Log-distance Path Loss, ground reflection empirical bilinear, Egli, and Okumura_Hata.

[0179] Step 4: Calculate the radio wave propagation loss PL(d).

[0180] Calculate the corresponding transmission loss PL based on different radio wave propagation models. b (d), in dB.

[0181] Step 5: Calculate the total filter loss L bAllFilter .

[0182] The total filter loss of the simulated communication jamming signal reaching the receiver of the participant's communication equipment is calculated using the same method as the interference calculation for the communication jamming party, according to step 2.1.5. .

[0183] Step 6: Calculate the transmission power of the simulated communication jamming equipment.

[0184]

[0185] in, The transmission power of the equipment used to simulate communication jamming is used to simulate the communication jamming of the other party. The interference power of the interference signal from the communication interfering party, calculated in step 2.1.6, reaches the receiver of the communication equipment of the training party. Antenna gain in the direction from the transmitter of the ground jamming equipment of the communication jammer to the receiver of the communication equipment of the trainee; Antenna gain from the receiver of the training party's communication equipment to the transmitter of the ground jamming equipment of the simulated communication jammer. To simulate the radio wave propagation loss from the ground jamming equipment of the communication jammer to the receiver of the communication equipment of the trainee. This is to simulate the total filter loss of the communication equipment receiver of the training participant when the interference signal from the ground jamming equipment of the communication jammer enters the receiver.

[0186] The simulated communication jammer interference effect calculation submodule 23 calculates the interference power of the simulated communication jammer's interference signal reaching the receiver of the training participant's communication equipment based on the parameters of the simulated communication jammer's communication jamming equipment and the natural environment parameters. The specific steps are as follows: Step 1: Select the type of communication jamming platform to simulate communication interference.

[0187] The system incorporates four types of simulated communication jamming platforms: fixed, vehicle-mounted, portable, and ground-distributed. The initial parameters and parameter constraints differ for each type of jamming platform.

[0188] Step 2: Configure the specific parameters of the communication interference simulation equipment of the simulated communication jammer and the communication equipment of the trainee.

[0189] The system automatically extracts the initial parameters of the jamming equipment corresponding to the selected simulated communication jamming platform type, and loads the initial parameters of the training participants' communication equipment. Users can modify the relevant parameters according to the actual situation.

[0190] Step 3: Select the simulation communication interference signal radio wave propagation loss model.

[0191] In practical application scenarios, communication interference simulation equipment for the communication interference party is usually deployed on the ground. When selecting the radio wave propagation loss model, referring to the ground interference equipment of the communication interference party, radio wave propagation is mainly based on ground-to-ground line-of-sight propagation. The system recommends using five types of engineering calculation models for radio wave propagation loss: free space, Log-distance Path Loss, ground reflection empirical bilinear, Egli, and Okumura_Hata.

[0192] Step 4: Calculate the radio wave propagation loss PLb (d)

[0193] Calculate the corresponding transmission loss PL based on different radio wave propagation models. b (d), in dB.

[0194] Step 5: Calculate the total filter loss L bAllFilter .

[0195] The total filter loss of the simulated communication jamming signal reaching the receiver of the participant's communication equipment is calculated using the same method as the interference calculation for the communication jamming party, according to step 2.1.5. .

[0196] Step 6: Calculate the power of the interference signal from the simulated communication interfering party reaching the receiving point of the training participant's communication equipment. .

[0197]

[0198] in The interference power of the interference signal from the simulated communication jammer reaching the receiver of the training participant's communication equipment, expressed in dBm. The transmission power of the jamming equipment is expressed in dBm. Antenna gain from the jamming equipment transmitter to the receiving equipment of the training participant's communication equipment, expressed in dBi. Antenna gain from the receiver of the participant's communication equipment to the transmitter of the jamming equipment, in dBi. The unit is dB, which represents the radio wave propagation loss of the interference signal from the communication jammer reaching the receiver of the training participant's communication equipment. The filtering loss of the interference signal reaching the receiver of the participant's communication equipment is expressed in dB.

[0199] Under normal conditions, the link connectivity calculation submodule 31 calculates the link connectivity between the two communication devices of the trainees when there is no interference signal, based on parameters such as the communication equipment of the trainees, the natural environment, the communication distance between the transmitters and receivers of the two parties, and the transmission power of the trainees' communication equipment. The specific steps are as follows: Step 1: Select the type of communication equipment for the training participant.

[0200] Select a communication device built into the system for the training participant. The initial parameters and parameter constraints vary depending on the type of communication device.

[0201] Step 2: Configure the specific parameters of the communication equipment of the participants.

[0202] The system automatically extracts the initial parameters of the communication equipment corresponding to the selected participant's communication equipment type, and the user can modify the relevant parameters according to the actual situation.

[0203] Step 3: Select the radio wave propagation loss model for the communication signal of the training participant.

[0204] In light of practical application scenarios, the communication equipment of the participants is usually deployed on the ground. When selecting the radio wave propagation loss model, referring to the ground jamming equipment of the communication jammer, radio wave propagation is mainly based on ground-to-ground line-of-sight propagation. The system recommends using five types of engineering calculation models for radio wave propagation loss: free space, Log-distance Path Loss, ground reflection empirical bilinear, Egli, and Okumura_Hata.

[0205] Step 4: Calculate the radio wave propagation loss PL i (d)

[0206] Based on different radio wave propagation models, and using the communication equipment parameters configured in step 2, the radio wave propagation loss PL from the transmitter signal of the participant's communication equipment to the receiver of the participant's communication equipment is calculated. i (d), in dB.

[0207] Step 5: Calculate the communication signal power from the transmitter of the trainee's communication equipment to the receiver of the trainee's communication equipment. .

[0208] In practical applications, the transmitters and receivers of the participating parties' communication equipment use the same frequency, so filtering loss is not considered. Calculation method:

[0209] in, The communication signal power from the transmitter of the trainee's communication equipment to the receiver of the trainee's communication equipment; The transmission power of the communication equipment of the participating party; Antenna gain from transmitter to receiver of the communication equipment of the participating party; Antenna gain from the receiver of the training participant's communication equipment to the transmitter of the training participant. The radio wave propagation loss from the transmitter of the training participant's communication equipment to the receiver of the training participant's communication equipment.

[0210] Step 6: Calculate the link connectivity between the transmitter and receiver of the trainee's communication equipment.

[0211] Link connectivity between the transmitter and receiver of the trainee's communication equipment Judgment method:

[0212] The link connectivity calculation submodule 32 under interference conditions calculates the link connectivity, interference-to-communication ratio, and interference-to-signal ratio of the two communicating parties based on the parameters of the participating party's communication equipment, environmental parameters, communication distance between the transmitters and receivers of both parties, transmission power of the participating party's communication equipment, interference equipment parameters, environmental parameters, and the following specific steps: Step 1: Select the interference platform type.

[0213] Choose either the system's built-in communication jamming platform or the simulated communication jamming platform.

[0214] Step 2: Configure the specific parameters of the jamming equipment.

[0215] The system automatically extracts the initial parameters from the jamming equipment corresponding to the selected jamming platform type, and the user can modify the relevant parameters according to the actual situation.

[0216] Step 3: Select the type of communication equipment for the training participants.

[0217] Select a communication device built into the system for the training participant. Different types of communication equipment have different initial parameters and parameter constraints.

[0218] Step 4: Configure the specific parameters of the training participants' communication equipment.

[0219] The system automatically extracts the initial parameters of the communication equipment corresponding to the selected participant's communication equipment type, and the user can modify the relevant parameters according to the actual situation.

[0220] Step 5: Select the propagation loss model for the interference signal radio waves.

[0221] When the selected jamming platform type is an aircraft, the radio wave propagation is mainly air-to-ground beyond-line-of-sight propagation. Based on a comprehensive analysis of the aircraft's effective range, flight altitude, and the terrain features of the ground-based jammed receiver, and combined with the applicable frequency range and propagation mode of the existing ITU radio wave propagation models, the system recommends using two types of engineering calculation models for radio wave propagation loss: ITU-R P.528 and ITU-R P.452.

[0222] When the selected jamming platform type is ground jamming equipment, radio wave propagation is mainly ground-to-ground line-of-sight propagation. The system recommends using five types of engineering calculation models for radio wave propagation loss: free space, Log-distance Path Loss, ground reflection empirical bilinearity, Egli, and Okumura_Hata.

[0223] Step 6: Calculate the radio wave propagation loss value PL(d) of the interference signal reaching the receiver of the communication equipment of the training participant.

[0224] Based on different radio wave propagation models, using the jamming equipment parameters configured in step 2, calculate the radio wave propagation loss value PL(d) of the signal from the jamming equipment transmitter to the receiver of the training participant's communication equipment, in dB.

[0225] Step 7: Calculate the total filter loss L bAllFilter .

[0226] The total filter loss of the interference signal reaching the receiver of the participant's communication equipment is calculated using the same method as the interference calculation for the communication jammer, according to step 2.1.5. .

[0227] Step 8: Calculate the interference signal power reaching the receiving point of the participant's communication equipment. .

[0228]

[0229] in, The interference power of the interfering signal reaching the receiver of the communication equipment of the training participant, expressed in dBm; The transmission power of the jamming equipment is expressed in dBm. Antenna gain from the jamming equipment transmitter to the receiving equipment of the training participant's communication equipment, expressed in dBi. Antenna gain from the receiver of the participant's communication equipment to the transmitter of the jamming equipment, in dBi. The radio wave propagation loss of the interference signal reaching the receiver of the training participant's communication equipment, expressed in dB. The filtering loss of the interference signal reaching the receiver of the participant's communication equipment is expressed in dB.

[0230] Step 9: Select the communication signal wave propagation loss model for the training participants.

[0231] In light of practical application scenarios, the communication equipment of the participants is usually deployed on the ground. When selecting the radio wave propagation loss model, referring to the ground jamming equipment of the communication jammer, radio wave propagation is mainly based on ground-to-ground line-of-sight propagation. The system recommends using five types of engineering calculation models for radio wave propagation loss: free space, Log-distance Path Loss, ground reflection empirical bilinear, Egli, and Okumura_Hata.

[0232] Step 10: Calculate the radio wave propagation loss PL b (d)

[0233] Based on different radio wave propagation models, and using the communication equipment parameters configured in step 2, the radio wave propagation loss PL from the transmitter signal of the participant's communication equipment to the receiver of the participant's communication equipment is calculated. b (d), in dB.

[0234] Step 11: Calculate the communication signal power from the transmitter of the trainee's communication equipment to the receiver of the trainee's communication equipment. .

[0235] In practical applications, the transmitters and receivers of the participating parties' communication equipment use the same frequency, so filtering loss is not considered. Calculation method:

[0236] in, The communication signal power from the transmitter of the trainee's communication equipment to the receiver of the trainee's communication equipment; The transmission power of the communication equipment of the participating party; Antenna gain from transmitter to receiver of the communication equipment of the participating party; Antenna gain from the receiver of the training participant's communication equipment to the transmitter of the training participant. The radio wave propagation loss from the transmitter of the training participant's communication equipment to the receiver of the training participant's communication equipment.

[0237] Step 12: Calculate the link connectivity between the transmitter and receiver of the trainee's communication equipment under interference conditions. .

[0238] Link connectivity between the transmitter and receiver of the trainee's communication equipment Judgment method:

[0239] Interference power of the interference signal reaching the receiver of the communication equipment of the training participant, in dBm; The signal power from the transmitter of the training equipment to the receiver of the training equipment is represented by dBm, and k is the interference suppression coefficient, also in dB.

[0240] Step 13 Calculate the dry-to-through ratio And dry letter ratio .

[0241] /

[0242] The distance at which the interference signal reaches the receiver of the participant's communication equipment. This refers to the distance between the transmitter and receiver of the communication equipment used by the participating party.

[0243]

[0244] The interference power of the interference signal reaching the receiver of the communication equipment of the training participant; The power of the communication signal from the transmitter of the training equipment to the receiver of the training equipment.

[0245] To verify the effectiveness of the method of this invention, simulation experiments were conducted to calculate the interference effect of the communication jammer and to simulate the equivalent process of the communication jammer. In the experiments, the natural environmental parameters were set as follows: flat terrain, clear weather, and standard climate type. The operating frequency of the communication equipment of the trainees was 350MHz, the receiving antenna gain was 2dBi, and the receiving antenna height was 3m. The communication jammer used an aircraft jamming platform with an interference distance of 100km, a transmitting antenna height of 11000m, a transmitting antenna gain of 5dBi, and a propagation loss model based on the ITU-R P.528 model. The simulated communication jammer used a vehicle-mounted ground jamming platform with an interference distance of 1.5km, a transmitting antenna height of 15m, a transmitting antenna gain of 1dBi, and a propagation loss model based on the logarithmic distance path loss model. The calculation results are shown in Table 3.

[0246] Table 3. Calculation results of interference effect and equivalent simulation results

[0247] Therefore, the method of this invention can comprehensively calculate the communication interference effect by considering parameters of the jamming equipment, communication equipment, and propagation environment. Furthermore, it can reverse-engineer the transmission power setting value of the simulated communication jamming equipment based on the interference effect of the jamming party. This transforms the traditional method of setting interference power based on manual experience into a calculable, comparable, and reproducible engineering calculation process, effectively solving the problems of strong subjectivity in interference power setting, insufficient equivalent simulation accuracy, and poor consistency of calculation results under different scenarios in existing technologies.

Claims

1. An engineering calculation system for equivalent communication interference effects, characterized in that, It includes a natural environment configuration module (1), an interference equivalent simulation module (2), and a link connectivity calculation module (3); wherein: the natural environment configuration module (1) is used to provide natural environment parameters for the interference equivalent simulation module (2) and the link connectivity calculation module (3); The interference equivalent simulation module (2) includes three sub-modules: a communication jammer interference effect calculation sub-module (21), a simulated communication jammer interference equivalent simulation sub-module (22), and a simulated communication jammer interference effect calculation sub-module (23). Specifically, the communication jammer interference effect calculation sub-module (21) calculates the interference power of the communication jammer's interference signal reaching the receiver of the trainee's communication equipment based on the communication jammer's interference equipment parameters and natural environment parameters. The simulated communication jammer interference equivalent simulation sub-module (22) calculates the transmission power of the simulated communication jammer's communication jamming simulation equipment when the interference effect of the equivalent communication jammer is simulated, based on the interference power calculation result of the communication jammer's interference signal reaching the receiver of the trainee's communication equipment, combined with the simulated communication jammer's communication jamming simulation equipment parameters and natural environment parameters. The simulated communication jammer interference effect calculation sub-module (23) calculates the interference power of the simulated communication jammer's interference signal reaching the receiver of the trainee's communication equipment based on the simulated communication jammer's communication jamming simulation equipment parameters and natural environment parameters. The link connectivity calculation module (3) includes two sub-modules: a link connectivity calculation sub-module (31) under normal conditions and a link connectivity calculation sub-module (32) under interference conditions. The link connectivity calculation sub-module (31) under normal conditions is used to calculate the link connectivity between the two communication devices of the trainee under interference-free conditions, based on natural environmental parameters, communication equipment parameters of the trainee, communication distance between the transmitters and receivers of the two parties, and transmission power of the trainee's communication equipment. The link connectivity calculation sub-module (32) under interference conditions is used to calculate the link connectivity, interference-to-communication ratio, and interference-to-signal ratio between the two communication devices of the trainee under interference conditions, based on natural environmental parameters, communication equipment parameters of the trainee, communication distance between the transmitters and receivers of the two parties, transmission power of the trainee's communication equipment, interference equipment parameters of the communication interference party, and communication interference simulation equipment parameters of the simulated communication interference party.

2. An engineering calculation method for equivalent communication interference effects, based on the engineering calculation system for equivalent communication interference effects as described in claim 1, characterized in that, Includes the following steps: Step 1, initialize the basic data configuration, including the initialization of the natural environment configuration module (1), the interference equivalent simulation module (2), and the link connectivity calculation module (3); Step 2, the interference equivalent simulation module (2) uses the communication interference effect calculation submodule (21) to calculate the interference power of the communication interference signal reaching the receiver of the training party's communication equipment, uses the analog communication interference equivalent simulation submodule (22) to calculate the transmission power of the analog communication interference simulation equipment when the equivalent analog communication interference effect is simulated, and uses the analog communication interference effect calculation submodule (23) to calculate the interference power of the analog communication interference signal reaching the receiver of the training party's communication equipment. Step 3, the link connectivity calculation module (3) uses the link connectivity submodule (31) under normal conditions to calculate the link connectivity between the two communication devices of the trainee when there is no interference signal, and the link connectivity submodule (32) under interference conditions to calculate the link connectivity, interference-to-connection ratio and interference-to-signal ratio between the two communication devices of the trainee when there is interference.

3. The engineering calculation method for equivalent communication interference effects as described in claim 2, characterized in that, Step 2 includes the following sub-steps: Step 2.1, the communication interference effect calculation submodule (21) calculates the interference power of the communication interference signal reaching the receiver of the training participant's communication equipment. The process is as follows; Step 2.1.1: Select the type of communication interference platform; Step 2.1.2: Configure the equipment parameters for calculating the interference effect of the communication interference party; Step 2.1.3: Select the propagation loss model of the interference signal from the communication interference party; Step 2.1.4: Substitute the parameters configured in Step 2.1.2 into the radio wave propagation loss model of the interference signal from the communication interference party selected in Step 2.1.3, and calculate the radio wave propagation loss of the interference signal from the communication interference party reaching the receiver of the communication equipment of the training party. Step 2.1.5: Calculate the total filter loss of the interference signal from the communication jammer reaching the receiver of the training participant's communication equipment, based on the jamming method of the communication jammer. Step 2.1.6: Calculate the interference power of the interference signal from the interfering party reaching the receiver of the training party's communication equipment; Step 2.2, the equivalent simulation submodule (22) calculates the transmission power of the communication interference simulation equipment of the simulated communication jammer when simulating the equivalent simulated communication jammer interference effect. The process is as follows: Step 2.2.1: Select the type of interference platform for the simulated communication interference; Step 2.2.2: Configure the equipment parameters for the simulation calculation of interference equivalent of the simulated communication interference party; Step 2.2.3: Select the simulation communication interference signal radio wave propagation loss model; Step 2.2.4: Calculate the radio wave propagation loss value of the simulated communication interference signal reaching the receiver of the training participant's communication equipment; Step 2.2.5: Calculate the total filter loss of the simulated communication interference signal reaching the receiver of the participant's communication equipment; Step 2.2.6: Calculate the transmission power of the communication interference simulation equipment of the simulated communication jammer when calculating the equivalent simulated communication jamming effect; Step 2.3, the simulated communication jammer interference effect calculation submodule (23) calculates the interference power of the simulated communication jammer's interference signal reaching the receiver of the trainee's communication equipment. The process is as follows: Step 2.3.1: Select the type of interference platform for the simulated communication interference; Step 2.3.2: Configure the equipment parameters for calculating the interference effect of the simulated communication jammer; Step 2.3.3: Select the simulation communication interference signal radio wave propagation loss model; Step 2.3.4: Calculate the radio wave propagation loss value of the simulated communication interference signal reaching the receiver of the training participant's communication equipment; Step 2.3.5: Calculate the total filter loss of the simulated communication interference signal reaching the receiver of the participant's communication equipment; Step 2.3.6: Calculate the interference power of the simulated communication interference signal reaching the receiver of the training participant's communication equipment.

4. The engineering calculation method for equivalent communication interference effects as described in claim 3, characterized in that, Step 3 includes the following sub-steps: Step 3.1, under normal conditions, the link connectivity submodule (31) calculates the link connectivity between the two communication devices of the trainees when there is no interference signal. The process is as follows: Step 3.1.1: Select the type of communication equipment used by the trainee; Step 3.1.2: Configure the specific parameters of the trainees' communication equipment; Step 3.1.3: Select the radio wave propagation loss model for the communication signal of the training participants; Step 3.1.4: Calculate the radio wave propagation loss from the transmitter of the trainee's communication equipment to the receiver of the trainee's communication equipment; Step 3.1.5: Calculate the communication signal power from the transmitter of the trainee's communication equipment to the receiver of the trainee's communication equipment; Step 3.1.6: Calculate the link connectivity between the two communication devices of the participating parties when there is no interference signal; Step 3.2, the link connectivity calculation submodule (32) under interference conditions calculates the link connectivity, interference-to-communication ratio, and interference-to-signal ratio between the two communication devices of the participating parties under interference conditions. The process is as follows: Step 3.2.1, select the interference platform type; Step 3.2.2: Configure the specific parameters of the jamming equipment; Step 3.2.3: Select the type of communication equipment used by the trainee; Step 3.2.4: Configure the specific parameters of the trainees' communication equipment; Step 3.2.5: Select the propagation loss model for the interference signal radio waves; Step 3.2.6: Calculate the radio wave propagation loss value of the interference signal reaching the receiver of the communication equipment of the training participant; Step 3.2.7: Calculate the total filter loss value of the interference signal reaching the receiver of the communication equipment of the training participant; Step 3.2.8: Calculate the interference power of the interference signal reaching the receiver of the communication equipment of the training participant; Step 3.2.9: Select the radio wave propagation loss model for the communication signal of the training participants; Step 3.2.10: Calculate the radio wave propagation loss value from the transmitter signal of the trainee's communication equipment to the receiver of the trainee's communication equipment; Step 3.2.11: Calculate the communication signal power from the transmitter of the trainee's communication equipment to the receiver of the trainee's communication equipment; Step 3.2.12: Calculate the communicability between the transmitter and receiver of the trainee's communication equipment under interference conditions; Step 3.2.13: Calculate the throughput ratio and the throughput signal ratio.

Images