Effective electromagnetic suppression distance prediction method, device and equipment and storage medium

Abstract

The application provides an effective electromagnetic suppression distance prediction method, device, equipment and storage medium, and particularly relates to the technical field of electromagnetic spectrum management and control. The method comprises the following steps: acquiring the spectrum characteristic parameters of both the electromagnetic management and control equipment and the suppressed target radio station, calculating the radio wave propagation path loss, the maximum receiving power of the target radio station, the frequency suppression factor and the interference equivalent radiation power, further combining the radio frequency protection rate and the harmful interference coefficient to calculate the effective electromagnetic suppression power of the target radio station, and calculating and outputting the effective suppression distance of the electromagnetic management and control equipment to the target radio station according to the above parameters. By introducing the key spectrum characteristic parameters of the electromagnetic space in the frequency domain, the spatial domain, the energy domain and the signal domain, the application solves the problem that the electromagnetic suppression capability of the electromagnetic management and control equipment is difficult to be comprehensively and intuitively displayed in the prior art, and improves the management and control capability and the combat effectiveness of the electromagnetic environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic spectrum management, in particular to an effective electromagnetic suppression distance prediction method, device, equipment and storage medium. BACKGROUND

[0002] In today's society, with the wide application of wireless communication technology, key areas such as political centers, economic hubs, and military bases face increasingly severe security challenges when hosting major events. Unauthorized radio station intrusion not only disrupts normal communication order, but also poses a serious threat to key links such as anti-terrorism, anti-drone, and information security. Traditional electromagnetic security protection methods have been difficult to meet the current complex and changing security needs. Therefore, using electromagnetic management equipment to implement electromagnetic suppression on the target radio station has become an effective electromagnetic management method. Electromagnetic suppression technology radiates electromagnetic interference signals into space to hinder the communication function of the target radio station, thereby achieving communication control in a specific area. However, the current electromagnetic suppression equipment still has significant shortcomings in the description and performance of management capabilities. Specifically, how to accurately describe the effective electromagnetic suppression distance, the maximum electromagnetic suppression distance, and other key comprehensive indicators of electromagnetic suppression equipment, and present them to management personnel in the form of electromagnetic management situation based on these indicators is a problem that needs to be solved. In addition, the performance of electromagnetic suppression equipment is affected by various factors, including operating frequency band, signal bandwidth, transmit power, antenna gain, and the like. The combined effect of these factors makes it complex and difficult to evaluate electromagnetic suppression capabilities.

[0003] In the field of electromagnetic management, situation presentation is an important means to assist management personnel in decision-making. However, the existing electromagnetic management situation presentation method mainly uses a heat map method based on an electronic map, which displays relatively single elements and lacks intuitive display of electromagnetic management capabilities of electromagnetic management equipment. This limitation makes it difficult for management personnel to fully understand the actual effectiveness of electromagnetic management equipment when deploying, scheduling, and making decisions, thereby affecting the overall effectiveness of electromagnetic management. Therefore, there is an urgent need for a situation presentation method that can comprehensively and intuitively display the electromagnetic suppression capabilities of electromagnetic management equipment to improve the efficiency and accuracy of electromagnetic management.

[0004] In summary, how to comprehensively and intuitively display the situation of electromagnetic suppression capabilities of electromagnetic management equipment to improve the efficiency and accuracy of electromagnetic management is a difficult problem that needs to be overcome in this technical field. SUMMARY

[0005] The main purpose of the present application is to provide an effective electromagnetic suppression distance prediction method, device, equipment and storage medium to solve the problem that it is difficult to comprehensively and intuitively display the electromagnetic suppression capabilities of electromagnetic management equipment in the prior art, thereby improving the efficiency and accuracy of electromagnetic management.

[0006] To achieve the above objectives, the present invention provides an effective electromagnetic suppression distance prediction method, apparatus, device, and storage medium to improve the efficiency and accuracy of electromagnetic control.

[0007] In a first aspect, the present invention provides an effective electromagnetic suppression distance prediction method, the method comprising:

[0008] Step S201: Obtain the spectral characteristic parameters of the electromagnetic control equipment and the spectral characteristic parameters of the suppressed target radio station. The spectral characteristic parameters of the electromagnetic control equipment include: the operating center frequency f of the electromagnetic control equipment. i Interference power spectral density P i (f) Interference antenna gain G i The spectral characteristic parameters of the suppressed target radio station include: the target radio station's operating center frequency f. c Transmit power P t Transmit antenna gain G t Receiver antenna gain pattern Gr(θ), maximum received power, communication distance d o Received spectrum template | H(f) 2 , Radio frequency protection rate (PR) of communication signals, and harmful interference coefficient (α);

[0009] Step S202: According to the target radio station's operating center frequency f c and the maximum received power communication distance d o The path loss L of the radio wave propagation when the target radio station has the maximum received power is calculated. p (f c ,d o );

[0010] Step S203: Based on the transmission power P t The transmitting antenna gain G t The receiving antenna gain pattern G r (θ) and the electromagnetic wave propagation path loss L p (f c ,d o The maximum received power P of the target radio station was calculated. max ;

[0011] Step S204: Based on the working center frequency f of the electromagnetic control equipment i The target radio station's operating center frequency f c The interference power spectral density Pi(f) and the received spectrum template |H(f) 2 The frequency suppression factor FDR was calculated.

[0012] Step S205: Based on the interference power spectral density Pi(f) and the interference antenna gain Gi , the interference equivalent isotropic radiated power I e.i.r.p ;

[0013] Step S206: according to the target radio station maximum receiving power P max , the communication signal radio frequency protection rate PR, the harmful interference coefficient a, the receiving antenna gain pattern G r (θ) and the frequency suppression factor FDR, the target radio station effective electromagnetic suppression power I e is calculated.

[0014] Step S207: according to the target radio station effective electromagnetic suppression power I e , the interference equivalent isotropic radiated power I e.i.r.p and the electromagnetic management equipment working center frequency f i , the effective electromagnetic suppression distance d e is calculated.

[0015] Further, the step S202 comprises:

[0016] According to the target radio station working center frequency f c and the maximum receiving power communication distance d o , the radio wave propagation path loss L p (f c ,d o ) is calculated by the following formula:

[0017] L p (f c ,d o ) = 32.4 + 20·lg(f c ) + 20·lg(d o )

[0018] Wherein, lg(·) represents the logarithmic function with base 10.

[0019] Further, the step S203 comprises:

[0020] According to the transmitting power P t , the transmitting antenna gain G t , the receiving antenna gain pattern G r (θ) and the radio wave propagation path loss L p (f c ,d o ), the target radio station maximum receiving power P max is calculated by the following formula:

[0021] P max = P t+G t -L p (f c ,d o )+G r (θ c )

[0022] wherein, G r (θ c ) is the target radio communication link direction receive antenna gain, which is obtained by looking up the corresponding value of θ r in the receive antenna gain pattern G c (θ), and θ c is the communication azimuth, i.e. the angle between the true north direction and the communication link clockwise.

[0023] Further, the step S204 comprises:

[0024] According to the electromagnetic management equipment working center frequency f i , the target radio working center frequency f c , the interference power spectral density Pi(f) and the receive spectrum template |H(f) 2 , the frequency rejection factor FDR is calculated by using the following formula:

[0025]

[0026] wherein, △f is the difference between the electromagnetic management equipment working center frequency f i and the target radio working center frequency f c , i.e. △f = f i -f c .

[0027] Further, the step S205 comprises:

[0028] According to the interference power spectral density Pi(f) and the interference antenna gain G i , the interference equivalent radiated power I e.i.r.p is calculated by using the following formula:

[0029] I e.i.r.p = P i +G i

[0030] wherein, P i is the electromagnetic management equipment interference power, P i = 10·lg(∫P i (f)df).

[0031] Further, the step S206 comprises:

[0032] According to the target station maximum receiving power P max , the communication signal radio frequency protection rate PR, the harmful interference coefficient a, the receiving antenna gain pattern G r (θ) and the frequency suppression factor FDR, the target station effective electromagnetic suppression power I e is calculated by the following formula:

[0033] I e =P max -PR+α+FDR-G r (θ i )

[0034] Wherein, G r (θ i ) is the interference path direction target station receiving antenna gain, which is obtained by looking up the corresponding value of θ r in the receiving antenna gain pattern G i (θ), θ i is the interference azimuth angle, that is, the angle between the true north direction and the clockwise direction of the interference path.

[0035] Further, the step S207 comprises:

[0036] According to the target station effective electromagnetic suppression power I e , the interference equivalent radiation power I e.i.r.p and the electromagnetic control equipment working center frequency f i , the effective electromagnetic suppression distance d e is calculated by the following formula:

[0037]

[0038] Secondly, the present application provides an effective electromagnetic suppression distance prediction device, which is applied to the effective electromagnetic suppression distance prediction method in the first aspect, comprising:

[0039] The acquisition module is used to execute step S201: acquiring electromagnetic control equipment spectrum characteristic parameters and suppressed target station spectrum characteristic parameters. Wherein, the electromagnetic control equipment spectrum characteristic parameters comprise: electromagnetic control equipment working center frequency f i , interference power spectral density Pi(f), interference antenna gain G i , and the suppressed target station spectrum characteristic parameters comprise: target station working center frequency f c , transmitting power P t , transmitting antenna gain G t , receiving antenna gain pattern Gr(θ) and maximum receiving power communication distance do Received spectrum template | H(f) 2 , Radio frequency protection rate (PR) of communication signals, and harmful interference coefficient (α);

[0040] The calculation module is used to execute step S202: based on the target radio station's operating center frequency f c and the maximum received power communication distance d o The path loss L of the radio wave propagation when the target radio station has the maximum received power is calculated. p (f c ,d o );

[0041] The calculation module is also used to execute step S203: based on the transmission power P t The transmitting antenna gain G t The receiving antenna gain pattern Gr(θ) and the radio wave propagation path loss L p (f c ,d o The maximum received power P of the target radio station was calculated. max ;

[0042] The calculation module is also used to execute step S204: based on the working center frequency f of the electromagnetic control equipment. i The target radio station's operating center frequency f c The interference power spectral density Pi(f) and the received spectrum template |H(f) 2 The frequency suppression factor FDR was calculated.

[0043] The calculation module is also used to execute step S205: based on the interference power spectral density P i (f) and the interference antenna gain G i The equivalent radiated power of the interference, I, was calculated. e.i.r.p ;

[0044] The calculation module is also used to execute step S206: based on the maximum received power P of the target radio station. max The communication signal RF protection factor PR, the harmful interference factor α, and the receiving antenna gain pattern G r Using (θ) and the frequency suppression factor FDR, the effective electromagnetic suppression power I of the target radio station is calculated. e ;

[0045] The calculation module is also used to execute step S207: based on the effective electromagnetic suppression power I of the target radio station. e The interference equivalent radiated power I e.i.r.p and the working center frequency f of the electromagnetic control equipment i, and output the effective electromagnetic suppression distance d e ;

[0046] The output module is configured to perform step S207: outputting the effective electromagnetic suppression distance d e .

[0047] Optionally, the calculation module is specifically configured to calculate the radio wave propagation path loss L c (f o ,d p ) of the target radio station at the maximum receiving power according to the target radio station operating center frequency f c and the maximum receiving power communication distance d o .

[0048] L p (f c ,d o ) = 32.4 + 20·lg(f c ) + 20·lg(d o )

[0049] Wherein, lg(·) represents the logarithmic function with base 10.

[0050] Optionally, the calculation module is specifically configured to calculate the target radio station maximum receiving power Pmax according to the transmitting power P t , the transmitting antenna gain G t , the receiving antenna gain pattern Gr(θ) and the radio wave propagation path loss L p (f c ,d o ).

[0051] P max = P t + G t - L p (f c ,d o ) + G r (θ c )

[0052] Wherein, G r (θ c ) is the target radio station communication link direction receiving antenna gain, which is obtained by looking up the value corresponding to θ r in the receiving antenna gain pattern G c (θ), θ c is the communication azimuth angle, that is, the angle between the true north direction and the clockwise communication link.

[0053] Optionally, the calculating module is specifically configured to calculate the frequency suppression factor FDR according to the electromagnetic management and control equipment working center frequency f i , the target radio station working center frequency f c , the interference power spectral density P 2 (f) and the receiving spectrum template H(f)

[0054]

[0055] wherein △f is the difference between the electromagnetic management and control equipment working center frequency f i and the target radio station working center frequency f c , i.e. △f = f i -f c .

[0056] Optionally, the calculating module is specifically configured to calculate the interference equivalent radiation power I i according to the interference power spectral density P i (f) and the interference antenna gain G e.i.r.p , by using the following formula:

[0057] I e.i.r.p = P i + G i

[0058] wherein P i is the electromagnetic management and control equipment interference power, and P i = 10·lg(∫P i (f)df).

[0059] Optionally, the calculating module is specifically configured to calculate the target radio station effective electromagnetic suppression power I max according to the target radio station maximum receiving power P r , the communication signal radio frequency protection rate PR, the harmful interference coefficient α, the receiving antenna gain pattern G e (θ) and the frequency suppression factor FDR, by using the following formula:

[0060] I e = P max -PR+α+FDR-G r (θ i )

[0061] wherein G r (θ i ) is the interference path direction target radio station receiving antenna gain, which is obtained by looking up the value corresponding to θi in the receiving antenna gain pattern G r (θ).i It is the interference azimuth angle, that is, the angle between true north and the interference path clockwise.

[0062] Optionally, the calculation module calculates the effective electromagnetic suppression power I of the target radio station. e The interference equivalent radiated power I e.i.r.p and the working center frequency f of the electromagnetic control equipment i The effective electromagnetic suppression distance d is calculated using the following formula. e :

[0063]

[0064] Thirdly, the present invention provides an effective electromagnetic suppression distance prediction device, the device comprising:

[0065] Memory;

[0066] processor;

[0067] The memory stores computer-executed instructions;

[0068] The processor executes computer execution instructions stored in the memory to implement the first aspect and / or various possible implementations of the first aspect, or to implement the second aspect and / or various possible implementations of the second aspect.

[0069] Fourthly, the present invention provides a computer storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect or to implement the second aspect and / or various possible implementations of the second aspect.

[0070] This invention provides an effective electromagnetic suppression distance prediction method, apparatus, device, and storage medium. The method acquires the spectral characteristic parameters of both the electromagnetic control equipment and the target radio station being suppressed, calculates the radio wave propagation path loss, the target radio station's maximum received power, frequency suppression factor, and equivalent radiated interference power. Furthermore, by combining RF protection factor and harmful interference coefficient, it calculates the effective electromagnetic suppression power of the target radio station. Based on these parameters, it calculates and outputs the effective suppression distance of the electromagnetic control equipment over the target radio station. This invention proposes an effective electromagnetic suppression distance prediction method by introducing key spectral characteristic parameters of the electromagnetic space in the frequency domain, spatial domain, energy domain, and signal domain. The effective electromagnetic suppression distance can be used as a comprehensive indicator of electromagnetic control effectiveness in the presentation of the electromagnetic situation, supplementing and improving the efficiency and accuracy of electromagnetic control. It solves the problem in existing technologies that it is difficult to comprehensively and intuitively display the electromagnetic suppression capabilities of electromagnetic control equipment, thereby enhancing the control capability and combat effectiveness of the electromagnetic environment. Attached Figure Description

[0071] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application, and are incorporated into and constitute a part of this specification. The embodiments of the application, and their

[0072] Figure 1 Application scenario diagram of the effective electromagnetic suppression distance prediction method provided by the application;

[0073] Figure 2 Flowchart of the effective electromagnetic suppression distance prediction method provided by the application;

[0074] Figure 3 Structure diagram of the effective electromagnetic suppression distance prediction device provided by the application;

[0075] Figure 4 Structure diagram of the effective electromagnetic suppression distance prediction device provided by the application;

[0076] Figure 5 Normalized power spectral density diagram of the electromagnetic management and control equipment provided by the application;

[0077] Figure 6 FM intercom 25kHz channel spacing receiving spectrum template diagram provided by the application;

[0078] Figure 7 Analysis diagram of the electromagnetic management and control equipment working in the intercom same frequency condition provided by the application;

[0079] Figure 8 Analysis diagram of the electromagnetic management and control equipment working in the intercom same frequency condition provided by the application;

[0080] Figure 9 Analysis diagram of the electromagnetic management and control equipment working in the intercom same frequency condition provided by the application.

[0081] Through the above-mentioned drawings, the specific embodiments of the application have been shown, and more detailed descriptions will be given hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the application in any way, but to illustrate the concept of the application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0082] In order to make the objects, technical solutions and advantages of the application clearer, the technical solutions in the application will be described clearly and completely below in conjunction with the drawings in the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the application.

[0083] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is to be construed to cover the embodiments of the application described herein as well as other embodiments that can be made without departing from the spirit and the scope of the application.

[0084] In the present application, the word "exemplary" or "for example" is used to illustrate, exemplify or describe, not to proscribe. Any embodiment or design described as "exemplary", "for example" or "illustrative" should be considered as not necessarily preferred or advantageous over other embodiments or designs.

[0085] With the rapid development of radio communication technology and its wide application, it has brought profound changes to various industries and people's life, such as smart phones, navigation, telemetry and remote control, and various types of radio stations have shown explosive growth. The problem of unauthorized radio station intrusion makes the key areas of major activities face an increasingly complex electromagnetic security threat. Not only does it disrupt the normal communication order, but it also brings serious challenges such as anti-terrorism and explosion prevention, anti-drone action, information security, etc. Traditional security protection means is not enough when facing complex electromagnetic environment, and it is difficult to meet the efficient and accurate electromagnetic control needs.

[0086] Electromagnetic suppression technology, as an innovative electromagnetic control means, effectively hinders the communication function of the target radio station by radiating electromagnetic interference signals into space, thereby achieving communication control in a specific area. However, the current electromagnetic suppression equipment has obvious shortcomings in describing and demonstrating its control capability, especially the lack of accurate description and intuitive display of key indicators such as effective suppression distance and maximum action distance. The combined effect of these factors makes the evaluation of the electromagnetic suppression capability of electromagnetic control equipment complex and difficult, making it difficult to provide comprehensive and accurate decision-making basis for control personnel.

[0087] In the field of electromagnetic control, situation presentation is a key tool to assist control personnel in making efficient decisions. However, the existing situation presentation methods are mostly limited to field strength or power heat map methods with electronic maps as the background, and the electromagnetic control elements displayed are biased towards technology and are not conducive to decision-making, lacking intuitive and comprehensive display of electromagnetic suppression capability of electromagnetic control equipment. This limitation limits the control personnel's comprehensive control of the actual effectiveness of electromagnetic control equipment when deploying, scheduling and making decisions, and thus affects the overall effectiveness and efficiency of electromagnetic control.

[0088] Therefore, aiming at the above problems, researching a situation presenting method capable of comprehensively and intuitively presenting the electromagnetic suppression capability of electromagnetic management and control equipment becomes a technical problem to be solved in the field of electromagnetic management and control.

[0089] The effective electromagnetic suppression distance prediction method, device and equipment provided by the application and the storage medium, the method obtains the spectrum characteristic parameters of the electromagnetic management and control equipment and the suppressed target radio station, calculates the radio wave propagation path loss, the maximum receiving power of the target radio station, the frequency suppression factor and the equivalent radiation power of interference, further, combines the radio frequency protection rate and the harmful interference coefficient to calculate the effective electromagnetic suppression power of the target radio station, and outputs the effective suppression distance of the electromagnetic management and control equipment to the target radio station according to the above parameters. The method comprehensively considers various influencing factors in the electromagnetic management and control process, and realizes accurate quantization and intuitive presentation of the electromagnetic management and control capability.

[0090] Figure 1 The application scenario diagram of the effective electromagnetic suppression distance prediction method provided by the application is shown, the electromagnetic management and control equipment implements electromagnetic suppression on the target radio station, and the target radio station in the area surrounded by the effective electromagnetic suppression distance will be suppressed; whether the target radio station outside the area is suppressed is related to the signal-to-interference-and-noise ratio received by the target radio station, and needs to be calculated specifically.

[0091] The technical solutions of the application and how to solve the above technical problems will be described in detail below with specific embodiments and the accompanying drawings.

[0092] Figure 2 The flowchart of the effective electromagnetic suppression distance prediction method provided by the application is shown, which details the effective electromagnetic suppression distance prediction method, and the method comprises:

[0093] Step S101: obtaining the spectrum characteristic parameters of the electromagnetic management and control equipment and the spectrum characteristic parameters of the suppressed target radio station. The spectrum characteristic parameters of the electromagnetic management and control equipment include: the working center frequency f i of the electromagnetic management and control equipment, the interference power spectrum density P i (f), the interference antenna gain G i , the spectrum characteristic parameters of the suppressed target radio station include: the working center frequency f c of the target radio station, the transmitting power P t , the transmitting antenna gain G t , the receiving antenna gain pattern G r (θ), the maximum receiving power communication distance d o , the receiving spectrum template |H(f) 2 , the communication signal radio frequency protection rate PR, and the harmful interference coefficient α.

[0094] Step S202: calculating the radio wave propagation path loss L c (f o ,d p ) according to the target radio station operating center frequency f c and the maximum receiving power communication distance d o .

[0095] Specifically, the radio wave propagation path loss L p (f c ,d o ) at the maximum receiving power of the target radio station is calculated by:

[0096] L p (f c ,d o ) = 32.4 + 20·lg(f c ) + 20·lg(d o )

[0097] wherein lg(·) represents a logarithm function with base 10.

[0098] It can be understood that d o is the communication distance at which the target radio station obtains the maximum receiving power. For example, the maximum receiving power of two intercoms is generally set to the power received when the communication distance between the two intercoms is 30 meters under the line-of-sight condition. In summary, the maximum receiving power of the target radio station can be estimated.

[0099] Step S203: calculating the maximum receiving power P max of the target radio station according to the transmitting power P t , the transmitting antenna gain G t , the receiving antenna gain pattern G r (θ), and the radio wave propagation path loss L p (f c ,d o ).

[0100] Specifically, the maximum receiving power P max of the target radio station is calculated by:

[0101] P max = P t + G t -L p (f c ,d o ) + G r (θ c )

[0102] wherein G r (θ c) for the target radio station communication link direction receive antenna gain by looking up the receive antenna gain pattern G r (θ) where θ c corresponding value acquisition, θ c is the communication azimuth, i.e. the angle between true north and the communication link clockwise (see Figure 1 ).

[0103] It can be understood that the effective electromagnetic suppression of the target radio station is mainly related to the electromagnetic management equipment, the spectrum characteristics of the target radio station, and the suppression path wave propagation between the electromagnetic management equipment and the target radio station. In the electromagnetic security task of key areas and major activities, the target radio station to be managed is difficult to calculate or evaluate the electromagnetic suppression effect due to unknown factors such as its geographical location, communication link, and wave transmission path loss. To solve this problem, a general conservative principle is adopted to estimate the maximum communication signal power received by the target radio station under good communication conditions. As long as the target radio station is effectively electromagnetically suppressed at the maximum communication signal power, i.e. suffers from harmful interference, it is believed that it will also suffer from harmful interference under other general conditions. Here, the target radio station can be a drone, a walkie-talkie or other types of communication radio station. In practice, the spectrum characteristic parameters P t , G t , G r (θ), the maximum received power communication distance d o , the spectrum receiving template |H(f) 2 , the communication signal radio frequency protection rate PR, and the harmful interference coefficient α are generally determined by the communication system, communication system standards or specifications, while the target radio station operating center frequency f c can be obtained through spectrum monitoring. Therefore, the maximum received power of the target radio station is the maximum received power of the target radio station obtained under the line-of-sight communication condition at a reasonable and short communication distance in practical applications.

[0104] Step S204: According to the electromagnetic management equipment operating center frequency f i , the target radio station operating center frequency f c , the interference power spectral density Pi(f) and the receiving spectrum template |H(f) 2 , the frequency suppression factor FDR is calculated.

[0105] Specifically, the frequency suppression factor FDR calculation method is:

[0106]

[0107] Where, △f is the difference between the electromagnetic management equipment operating center frequency f i and the target radio station operating center frequency f c , i.e. △f=fi -f c .

[0108] It can be understood that the frequency suppression factor FDR depicts the normalized interference amount of the transmitting device with certain transmitting power spectrum density characteristics in the frequency domain entering the target station working channel. The frequency suppression factor is generally applicable to co-frequency and adjacent frequency interference analysis.

[0109] Step S205: According to the interference power spectrum density P i (f) and the interference antenna gain G i , the interference equivalent radiated power I e.i.r.p is calculated.

[0110] Specifically, the interference equivalent radiated power I e.i.r.p is calculated by the following method:

[0111] I e.i.r.p = P i + G i

[0112] Wherein, P i is the electromagnetic control equipment interference power, P i = 10·lg(∫P i (f)df), f is the frequency.

[0113] Step S206: According to the target station maximum receiving power P max , the communication signal radio frequency protection rate PR, the harmful interference coefficient α, the receiving antenna gain pattern G r (θ) and the frequency suppression factor FDR, the target station effective electromagnetic suppression power I e is calculated.

[0114] Specifically, the target station effective electromagnetic suppression power I e is calculated by the following method:

[0115] I e = P max - PR + α + FDR - G r (θ i )

[0116] Wherein, G r (θ i ) is the interference path direction target station receiving antenna gain, which is obtained by looking up the value corresponding to θi in the receiving antenna gain pattern G r (θ), θ i is the interference azimuth angle, that is, the included angle between the true north direction and the interference path clockwise (see Figure 1 ).

[0117] Further, G r (θ i ) is the target station receiving antenna gain in the direction of the interference path. For mobile service, the antenna of the station generally uses an omnidirectional antenna, and the omnidirectional antenna is isotropic, so that the antenna gain is the same in any horizontal direction, and thus G r (θ i ) = G r (θ c ).

[0118] It can be understood that PR is a radio frequency protection rate of a communication signal, and PR is different for different modulation types of signals, such as PR = 12 dB for an FM signal. PR is defined as a minimum ratio of a useful signal to a useless signal at an input end of a receiver under a specified condition for reaching a specified receiving quality at an output end of the receiver, and is usually expressed in decibels. α is a harmful interference coefficient, and in general, α = 6 dB is taken.

[0119] Step S207: according to the effective electromagnetic suppression power I e of the target station, the equivalent radiation power I e.i.r.p of the interference, and the working center frequency f i of the electromagnetic management equipment, an effective electromagnetic suppression distance d e is calculated.

[0120] Specifically, the calculation method of the effective electromagnetic suppression distance d e is as follows:

[0121]

[0122] Alternatively, if the working center frequency of the electromagnetic management equipment is the same as the working center frequency of the target station and the target station uses an omnidirectional antenna, the effective electromagnetic suppression distance can be simplified as:

[0123]

[0124] It can be understood that, in order to better exert the electromagnetic suppression effect of the electromagnetic management equipment, the electromagnetic management equipment is generally erected at a higher position to form a line-of-sight propagation, so as to reduce the influence of path loss of electromagnetic suppression as much as possible. If it is not a line-of-sight propagation, a relevant radio wave propagation model can be used for calculation.

[0125] The present application is further described below in combination with a simulation experiment. The simulation parameters are mainly obtained from measured data of a kind of electromagnetic management equipment and relevant regulations of communication equipment in China. If there is a deviation between these parameters and the actual situation, it will not affect the effective electromagnetic suppression distance prediction method given by the present application, and the simulation results are mainly used to show the practicability of the prediction method.

[0126] Simulation software: Matlab R2014a, operating system: Windows 10.

[0127] Simulation content: Effective electromagnetic suppression distance prediction of intercom.

[0128] Simulation parameters: Interference power 50W emitted by electromagnetic management and control equipment S108A, working center frequency 440MHz, omnidirectional transmitting antenna gain 3dB, interference spectrum template as shown in Figure 5 ; Intercom NXDN working center frequency 441.14MHz, necessary bandwidth 25kHz, signal modulation type FM, transceiving omnidirectional antenna gain 1dB, transmitting power 5W, receiving spectrum template as shown in Figure 6 , radio frequency protection rate 12dB, harmful interference coefficient 6dB.

[0129] Simulation result analysis:

[0130] When the electromagnetic management and control equipment and the intercom both work at 441.140MHz, this case is co-channel interference, as shown in Figure 7 , frequency depression factor FDR=0dB, and the effective electromagnetic suppression distance is 317m; when the electromagnetic management and control equipment works at 441.148MHz and the intercom works at 441.140MHz, this case is frequency deviation 8kHz suppression, nearly half of the suppression power enters the intercom channel, FDR=3.46dB, as shown in Figure 8 , and the effective suppression distance is 213m; when the electromagnetic management and control equipment works at the adjacent channel of the intercom, i.e. the working frequency is 441.165MHz, as shown in Figure 9 , frequency depression factor FDR=70dB, and the effective electromagnetic suppression distance is 0m, which cannot implement suppression on the intercom.

[0131] Figure 3 The structural schematic diagram of the effective electromagnetic suppression distance prediction device provided by the present application is shown in Figure 3 , the effective electromagnetic suppression distance prediction device 300 provided by the present application comprises:

[0132] The acquisition module 301 is used for acquiring electromagnetic management and control equipment spectrum characteristic parameters and suppressed target radio station spectrum characteristic parameters. The electromagnetic management and control equipment spectrum characteristic parameters comprise electromagnetic management and control equipment working center frequency f i , interference power spectrum density Pi(f), interference antenna gain G i , and the suppressed target radio station spectrum characteristic parameters comprise target radio station working center frequency f c , transmitting power P t , transmitting antenna gain G t , receiving antenna gain pattern Gr(θ), and maximum receiving power communication distance d oReceived spectrum template | H(f) 2 , Radio frequency protection rate (PR) of communication signals, and harmful interference coefficient (α);

[0133] Calculation module 302, the calculation module 302 is used to calculate the target radio station's operating center frequency f. c and the maximum received power communication distance d o The path loss L of the radio wave propagation when the target radio station has the maximum received power is calculated. p (f c ,d o );

[0134] The calculation module 302 is further configured to calculate based on the transmission power P t The transmitting antenna gain G t The receiving antenna gain pattern G r (θ) and the electromagnetic wave propagation path loss L p (f c ,d o The maximum received power P of the target radio station was calculated. max ;

[0135] The calculation module 302 is also used to calculate the working center frequency f of the electromagnetic control equipment. i The target radio station's operating center frequency f c The interference power spectral density Pi(f) and the received spectrum template |H(f) 2 The frequency suppression factor FDR was calculated.

[0136] The calculation module 302 is further configured to calculate based on the interference power spectral density P i (f) and the gain G of the interference antenna i The equivalent radiated power of the interference, I, was calculated. e.i.r.p ;

[0137] The calculation module 302 is further configured to calculate based on the maximum receiving power P of the target radio station. max The communication signal RF protection factor PR, the harmful interference factor α, and the receiving antenna gain pattern G r Using (θ) and the frequency suppression factor FDR, the effective electromagnetic suppression power I of the target radio station is calculated. e ;

[0138] The calculation module 302 is also used to calculate the effective electromagnetic suppression power I of the target radio station. e The interference equivalent radiated power I e.i.r.p and the working center frequency f of the electromagnetic control equipment i Calculate and output the effective electromagnetic suppression distance d e .

[0139] an output module 303, configured to output the effective electromagnetic suppression distance d e .

[0140] Optionally, the calculation module 302 is specifically configured to calculate the radio wave propagation path loss L c (f c ,d o ) at the maximum receiving power of the target radio station according to the target radio station operating center frequency f o and the maximum receiving power communication distance d p . c , o ) by using the following formula:

[0141] L p (f c ,d o ) = 32.4 + 20·lg(f c ) + 20·lg(d o )

[0142] wherein, lg(·) represents a logarithmic function with base 10.

[0143] Optionally, the calculation module 302 is specifically configured to calculate the target radio station maximum receiving power P max according to the transmitting power P t , the transmitting antenna gain G t , the receiving antenna gain pattern Gr(θ) and the radio wave propagation path loss L p (f c ,d o ) by using the following formula:

[0144] P max = P t + G t -L p (f c ,d o ) + G r (θ c )

[0145] wherein, G r (θ c ) is the target radio station communication link direction receiving antenna gain, which is obtained by looking up the value corresponding to θ c in the receiving antenna gain pattern G r (θ), and θ c is the communication azimuth angle, i.e. the included angle between the true north direction and the clockwise communication link.

[0146] Optionally, the calculating module 302 is specifically configured to calculate the frequency rejection factor FDR according to the electromagnetic management and control equipment operating center frequency f i , the target radio operating center frequency f c , the interference power spectral density P 2 (f) and the received spectrum template |H(f)

[0147]

[0148] Wherein, △f is the difference between the electromagnetic management and control equipment operating center frequency f i and the target radio operating center frequency f c , that is, △f = f i -f c .

[0149] Optionally, the calculating module 302 is specifically configured to calculate the interference equivalent radiation power I i according to the interference power spectral density P i (f) and the interference antenna gain G e.i.r.p , using the following formula:

[0150] I e.i.r.p = P i + G i

[0151] Wherein, P i is the electromagnetic management and control equipment interference power, P i = 10·lg(∫P i (f)df).

[0152] Optionally, the calculating module 302 is specifically configured to calculate the target radio effective electromagnetic suppression power I max according to the target radio maximum receiving power P r , the communication signal radio frequency protection rate PR, the harmful interference coefficient α, the receiving antenna gain pattern G e (θ) and the frequency rejection factor FDR, using the following formula:

[0153] I e = P max -PR+α+FDR-G r (θ i )

[0154] Wherein, G r (θ i ) is the interference path direction target radio receiving antenna gain, which is obtained by looking up the receiving antenna gain pattern G r (θ) in θi Corresponding value acquisition, theta i Is the jamming azimuth, that is, the angle between the true north direction and the jamming path clockwise.

[0155] Optionally, the computing module 302 is specifically configured to calculate the effective electromagnetic suppression distance d according to the target radio station effective electromagnetic suppression power I e , the interference equivalent isotropically radiated power I e.i.r.p , and the electromagnetic management equipment operating center frequency f i , using the following formula: e

[0156]

[0157] Figure 4 The structure diagram of the effective electromagnetic suppression distance prediction device provided by the present application is shown in FIG. 4, and the effective electromagnetic suppression distance prediction device 400 provided by the present embodiment includes: Figure 4

[0158] A memory 402;

[0159] A processor 401;

[0160] The memory 402 stores computer execution instructions;

[0161] The processor 401 executes the computer execution instructions stored in the memory to realize the effective electromagnetic suppression distance prediction method shown in the above embodiment.

[0162] The present application also provides a computer storage medium, which stores computer execution instructions, and the computer execution instructions are executed by a processor to realize the effective electromagnetic suppression distance prediction method shown in the above embodiment.

[0163] ​​Those of ordinary skill in the art will realize and understand that all or certain steps in the methods disclosed above, the functional modules / units in the systems and devices can be implemented as software, firmware, hardware and appropriate combinations thereof. In hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component can have multiple functions, or one function or step can be performed by several physical components in cooperation. Certain physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software can be distributed on a computer readable medium, which can include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Further, it is well known to those of ordinary skill in the art that communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

[0164] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the application encompass any and all variations, uses or adaptations of the application which are reasonably inferred to be within the scope of the application as defined by the claims and that the specification and examples be considered illustrative. The true scope and spirit of the application is indicated by the appended claims.

[0165] It should be understood that the application is not limited to the precise construction and compositions described above and illustrated in the accompanying drawings and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is indicated by the appended claims, rather than the description and examples.

Claims

1. A distance prediction method for effective electromagnetic suppression in areas requiring electromagnetic control, characterized in that, The method includes: Step S201: Obtain the spectrum characteristic parameters of the electromagnetic control equipment and the spectrum characteristic parameters of the suppressed target radio station, wherein the spectrum characteristic parameters of the electromagnetic control equipment include: the operating center frequency of the electromagnetic control equipment. Interference power spectral density Interference antenna gain The spectral characteristic parameters of the suppressed target radio station include: the target radio station's operating center frequency. Transmission power Transmit antenna gain Receiver antenna gain pattern Maximum received power and communication distance Received spectrum template RF protection rate of communication signals Harmful interference coefficient ; Step S202: Based on the target radio station's operating center frequency and the maximum received power communication distance The path loss of radio wave propagation at the maximum received power of the target radio station was calculated. ; Step S203: Based on the transmission power The gain of the transmitting antenna The receiving antenna gain pattern and the radio wave propagation path loss The maximum received power of the target radio station was calculated. ; Step S204: Based on the operating center frequency of the electromagnetic control equipment The target radio station's operating center frequency The interference power spectral density and the received spectrum template The frequency suppression factor was calculated. ; Step S205: Based on the interference power spectral density and the gain of the interference antenna The equivalent radiated power of the interference was calculated. ; Step S206: Based on the maximum received power of the target radio station The radio frequency protection rate of the communication signal The harmful interference coefficient The receiving antenna gain pattern and the frequency suppression factor The effective electromagnetic suppression power of the target radio station was calculated. : in, The target radio receiver antenna gain in the direction of the interference path is determined by looking up the receiver antenna gain pattern. middle Get the corresponding value. It is the interference azimuth angle, that is, the angle between true north and the interference path clockwise; Step S207: Based on the effective electromagnetic suppression power of the target radio station The interference equivalent radiated power and the working center frequency of the electromagnetic control equipment The effective electromagnetic suppression distance was calculated. : 。 2. The method according to claim 1, characterized in that, Step S202 includes: According to the target radio station's operating center frequency and the maximum received power communication distance The following formula is used to calculate the radio wave propagation path loss at the maximum received power of the target radio station. : in, This represents the logarithmic function with base 10.

3. The method according to claim 1, characterized in that, Step S203 includes: According to the transmission power The gain of the transmitting antenna The receiving antenna gain pattern and the radio wave propagation path loss The maximum received power of the target radio station is calculated using the following formula. : in, The target radio communication link direction receiving antenna gain is determined by looking up the receiving antenna gain pattern. middle Get the corresponding value. It is the communication azimuth angle, that is, the angle between true north and the clockwise direction of the communication link.

4. The method according to claim 1, characterized in that, Step S204 includes: According to the working center frequency of the electromagnetic control equipment The target radio station's operating center frequency The interference power spectral density and the received spectrum template The frequency suppression factor is calculated using the following formula. : in, For the working center frequency of electromagnetic control equipment With the target radio station's working center frequency The difference, i.e. .

5. The method according to claim 1, characterized in that, Step S205 includes: According to the interference power spectral density and the gain of the interference antenna The equivalent radiated power of the interference is calculated using the following formula. : in, For electromagnetic control equipment interference power, .

6. A distance prediction device for effective electromagnetic suppression in areas requiring electromagnetic control, characterized in that, The apparatus is applied to the distance prediction method according to any one of claims 1-5, comprising: The acquisition module is used to acquire the spectral characteristic parameters of the electromagnetic control equipment and the spectral characteristic parameters of the suppressed target radio station. The spectral characteristic parameters of the electromagnetic control equipment include: the operating center frequency of the electromagnetic control equipment. Interference power spectral density Interference antenna gain The spectral characteristic parameters of the suppressed target radio station include: the target radio station's operating center frequency. Transmission power Transmit antenna gain Receiver antenna gain pattern Maximum received power and communication distance Received spectrum template RF protection rate of communication signals Harmful interference coefficient ; The calculation module is used to calculate the target radio station's operating center frequency. and the maximum received power communication distance The path loss of radio wave propagation at the maximum received power of the target radio station was calculated. ; The calculation module is also configured to calculate based on the transmission power. The gain of the transmitting antenna The receiving antenna gain pattern and the radio wave propagation path loss The maximum received power of the target radio station was calculated. ; The calculation module is also used to calculate the working center frequency of the electromagnetic control equipment. The target radio station's operating center frequency The interference power spectral density and the received spectrum template The frequency suppression factor was calculated. ; The calculation module is also used to calculate based on the interference power spectral density. and the gain of the interference antenna The equivalent radiated power of the interference was calculated. ; The calculation module is also used to calculate based on the maximum receiving power of the target radio station. The radio frequency protection rate of the communication signal The harmful interference coefficient The receiving antenna gain pattern and the frequency suppression factor The effective electromagnetic suppression power of the target radio station was calculated. ; The calculation module is also used to calculate the effective electromagnetic suppression power of the target radio station. The interference equivalent radiated power and the working center frequency of the electromagnetic control equipment The effective electromagnetic suppression distance was calculated. ; Output module, the output module is used to output the effective electromagnetic suppression distance. .

7. A distance prediction device for effective electromagnetic suppression in areas requiring electromagnetic control, characterized in that, include: Memory; processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the distance prediction method as described in any one of claims 1-5.

8. A computer storage medium, characterized in that, The computer storage medium stores computer execution instructions, which, when executed by a processor, are used to implement the distance prediction method as described in any one of claims 1-5.

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