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

Abstract

The invention provides an effective electromagnetic suppression distance prediction method and device, equipment and a storage medium, and particularly relates to the technical field of electromagnetic spectrum management and control. According to the method, radio wave propagation path loss, the maximum receiving power of a target radio station, a frequency suppression factor and interference equivalent radiation power are calculated by obtaining spectrum characteristic parameters of electromagnetic management and control equipment and a suppressed target radio station, and further, the effective electromagnetic suppression power of the target radio station is calculated by combining a radio frequency protection rate, a harmful interference coefficient and the like. And calculating and outputting the effective suppression distance of the electromagnetic control equipment to the target radio station according to the parameters. According to the invention, key spectrum characteristic parameters of an electromagnetic space in a frequency domain, a space domain, an energy domain, a signal domain and the like are introduced, so that the problem that the electromagnetic suppression capability of electromagnetic control equipment is difficult to comprehensively and visually display in the prior art is solved, and the control capability and combat effectiveness of an electromagnetic environment are improved.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic spectrum control technology, and in particular to an effective electromagnetic suppression distance prediction method, device, equipment and storage medium. Background Art

[0002] In today's society, with the widespread application of radio 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 and explosion prevention, anti-drone, and information confidentiality. Traditional electromagnetic security protection measures can no longer meet the current complex and changeable security needs. Therefore, using electromagnetic control equipment to implement electromagnetic suppression on invading target radio stations has become an effective electromagnetic control 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 deficiencies in the description and performance of control capabilities. Specifically, how to accurately describe the key comprehensive indicators of electromagnetic suppression equipment such as the effective electromagnetic suppression distance and the maximum electromagnetic suppression distance, and present them to the control personnel in the form of electromagnetic control status based on these indicators, is an urgent problem to be solved. In addition, the performance of electromagnetic suppression equipment is affected by many factors, including working frequency band, signal bandwidth, transmission power, antenna gain, etc. The combined effect of these factors makes the evaluation of electromagnetic suppression capabilities complex and difficult.

[0003] In the field of electromagnetic control, situation presentation is an important means to assist control personnel in making decisions. However, the existing electromagnetic control situation presentation method mainly uses a heat map with an electronic map as the background. The elements displayed are relatively simple and lack an intuitive display of the electromagnetic control capabilities of electromagnetic control equipment. This limitation makes it difficult for control personnel to fully understand the actual effectiveness of electromagnetic control equipment during deployment, scheduling, and decision-making, thus affecting the overall effect of electromagnetic control. Therefore, there is an urgent need for a situation presentation method that can comprehensively and intuitively display the electromagnetic suppression capabilities of electromagnetic control equipment to improve the efficiency and accuracy of electromagnetic control.

[0004] To sum up, how to comprehensively and intuitively display the status of the electromagnetic suppression capability of electromagnetic control equipment to improve the efficiency and accuracy of electromagnetic control is a difficult problem that needs to be overcome urgently in this technical field. Summary of the invention

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

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

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

[0008] Step S201: Obtain the spectrum characteristic parameters of the electromagnetic control equipment and the spectrum characteristic parameters of the suppressed target radio station. The spectrum characteristic parameters of the electromagnetic control equipment include: the electromagnetic control equipment working center frequency f i , interference power spectral density P i (f) Interference antenna gain G i The spectrum characteristic parameters of the suppressed target radio station include: the target radio station working center frequency f c , Transmitting power P t , Transmitting antenna gain G t , receiving antenna gain pattern Gr(θ), maximum receiving power communication distance d o 、Receive spectrum template |H(f) 2 , communication signal radio frequency protection ratio PR, harmful interference coefficient α;

[0009] Step S202: According to the target radio station working center frequency f c and the maximum received power communication distance d o , calculate the radio wave propagation path loss L when the target station receives the maximum power p (f c ,d o );

[0010] Step S203: According to the transmission 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 ), calculate the maximum receiving power P of the target radio station max ;

[0011] Step S204: According to the working center frequency f of the electromagnetic control equipment i , the target radio station operating center frequency f c , the interference power spectrum density Pi(f) and the received spectrum template |H(f) 2 , calculate the frequency suppression factor FDR;

[0012] Step S205: According to the interference power spectrum density Pi(f) and the interference antenna gain Gi , calculate the interference equivalent radiated power I e.i.r.p ;

[0013] Step S206: According to the maximum receiving power P of the target station 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 effective electromagnetic suppression power I of the target radio station is calculated e ;

[0014] Step S207: According to 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 the effective electromagnetic suppression distance d e .

[0015] Furthermore, the step S202 includes:

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

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

[0018] Here, lg(·) represents a logarithmic function with base 10.

[0019] Furthermore, the step S203 includes:

[0020] According to the transmission 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 ), use the following formula to calculate the maximum receiving power P of the target radio station max :

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

[0022] Among them, G r (θ c ) is the receiving antenna gain in the communication link direction of the target radio station, and the receiving antenna gain in the communication link direction of the target radio station is obtained by finding the receiving antenna gain pattern G r (θ) c The corresponding value is obtained, θ c It is the communication azimuth, that is, the angle between the true north direction and the communication link clockwise.

[0023] Furthermore, the step S204 includes:

[0024] According to the working center frequency f of the electromagnetic control equipment i , the target radio station operating center frequency f c , the interference power spectrum density Pi(f) and the received spectrum template |H(f) 2 , the frequency suppression factor FDR is calculated using the following formula:

[0025]

[0026] Among them, △f is the working center frequency f of the electromagnetic control equipment i The target radio station's operating center frequency f c The difference between i -f c .

[0027] Furthermore, the step S205 includes:

[0028] According to the interference power spectrum density Pi(f) and the interference antenna gain G i , use the following formula to calculate the interference equivalent radiated power I e.i.r.p :

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

[0030] Among them, P i is the interference power of electromagnetic control equipment, P i =10·lg(∫P i (f)df).

[0031] Furthermore, the step S206 includes:

[0032] According to the maximum receiving power P of the target station 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 following formula is used to calculate the effective electromagnetic suppression power I of the target radio station: e :

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

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

[0035] Furthermore, the step S207 includes:

[0036] According to 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 , use the following formula to calculate the effective electromagnetic suppression distance d e :

[0037]

[0038] In a second aspect, the present invention 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 the spectrum characteristic parameters of the electromagnetic control equipment and the spectrum characteristic parameters of the suppressed target radio station. The spectrum characteristic parameters of the electromagnetic control equipment include: the working center frequency f of the electromagnetic control equipment i , interference power spectral density Pi(f), interference antenna gain G i The spectrum characteristic parameters of the suppressed target radio station include: the target radio station working center frequency f c , Transmitting power P t , Transmitting antenna gain G t , receiving antenna gain pattern Gr(θ), maximum receiving power communication distance do 、Receive spectrum template |H(f) 2 , communication signal radio frequency protection ratio PR, harmful interference coefficient α;

[0040] A calculation module is used to execute step S202: according to the target radio station working center frequency f c and the maximum received power communication distance d o , calculate the radio wave propagation path loss L when the target station receives the maximum power p (f c ,d o );

[0041] The calculation module is further used to execute step S203: according to 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 ), calculate the maximum receiving power P of the target radio station max ;

[0042] The calculation module is also used to execute step S204: according to the working center frequency f of the electromagnetic control equipment i , the target radio station operating center frequency f c , the interference power spectrum density Pi(f) and the received spectrum template |H(f) 2 , calculate the frequency suppression factor FDR;

[0043] The calculation module is further used to execute step S205: according to the interference power spectrum density P i (f) and the interference antenna gain G i , calculate the interference equivalent radiated power I e.i.r.p ;

[0044] The calculation module is also used to execute step S206: according to the maximum receiving power P of the target station 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 effective electromagnetic suppression power I of the target radio station is calculated e ;

[0045] The calculation module is also used to execute step S207: according to the effective electromagnetic suppression power I of the target 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 ;

[0046] Output module, the output module is used to execute step S207: output the effective electromagnetic suppression distance d e .

[0047] Optionally, the calculation module is specifically configured to calculate the target radio station operating center frequency f c and the maximum received power communication distance d o , use the following formula to calculate the radio wave propagation path loss L when the target station has the maximum receiving power p (f c ,d o ):

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

[0049] Here, lg(·) represents a logarithmic function with base 10.

[0050] Optionally, the calculation module is specifically configured to calculate the transmission power P according to 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 ), use the following formula to calculate the maximum receiving power Pmax of the target radio station:

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

[0052] Among them, G r (θ c ) is the receiving antenna gain in the communication link direction of the target radio station, and the receiving antenna gain in the communication link direction of the target radio station is obtained by finding the receiving antenna gain pattern G r (θ) c The corresponding value is obtained, θ c It is the communication azimuth, that is, the angle between the true north direction and the communication link clockwise.

[0053] Optionally, the calculation module is specifically used to calculate the working center frequency f of the electromagnetic control equipment according to the working center frequency f i , the target radio station operating center frequency f c , the interference power spectrum density Pi(f) and the received spectrum template H(f) 2 , the frequency suppression factor FDR is calculated using the following formula:

[0054]

[0055] Among them, △f is the working center frequency f of the electromagnetic control equipment i The target radio station's operating center frequency f c The difference between i -f c .

[0056] Optionally, the calculation module is specifically configured to calculate the interference power spectrum density P according to the interference power spectrum density P i (f) and the interference antenna gain G i , use the following formula to calculate the interference equivalent radiated power I e.i.r.p :

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

[0058] Among them, P i is the interference power of electromagnetic control equipment, P i =10·lg(∫P i (f)df).

[0059] Optionally, the calculation module is specifically configured to calculate the maximum receiving power P of the target station according to 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 following formula is used to calculate the effective electromagnetic suppression power I of the target radio station: e :

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

[0061] Among them, G r (θ i ) is the receiving antenna gain of the target station in the interference path direction, and the receiving antenna gain of the target station in the interference path direction is obtained by finding the receiving antenna gain pattern G r (θ) The value corresponding to θi in (θ) is obtained, θi is the interference azimuth, that is, the clockwise angle between the true north direction and the interference path.

[0062] Optionally, the calculation module is configured to calculate the effective electromagnetic suppression power I of the target radio station according to 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 , use the following formula to calculate the effective electromagnetic suppression distance d e :

[0063]

[0064] In a third aspect, the present invention provides an effective electromagnetic suppression distance prediction device, the device comprising:

[0065] Memory;

[0066] processor;

[0067] Wherein, the memory stores computer-executable instructions;

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

[0069] In a fourth aspect, the present invention provides a computer storage medium, wherein the computer-readable storage medium stores computer execution instructions, and when the computer execution instructions are executed by a processor, they are used to implement the first aspect and / or various possible implementation methods of the first aspect as above, or to implement the second aspect and / or various possible implementation methods of the second aspect as above.

[0070] The effective electromagnetic suppression distance prediction method, device, equipment and storage medium provided by the present invention obtain the spectrum characteristic parameters of both the electromagnetic control equipment and the suppressed target radio station, calculate the radio wave propagation path loss, the maximum receiving power of the target radio station, the frequency suppression factor and the interference equivalent radiated power, and further calculate the effective electromagnetic suppression power of the target radio station in combination with the radio frequency protection rate, the harmful interference coefficient, etc., and calculate and output the effective suppression distance of the electromagnetic control equipment to the target radio station based on the above parameters. The present invention proposes an effective electromagnetic suppression distance prediction method by introducing key spectrum characteristic parameters of the electromagnetic space in the frequency domain, space domain, energy domain and signal domain. The effective electromagnetic suppression distance can be used as a comprehensive indicator of the electromagnetic control effect and applied to the presentation of the electromagnetic situation, supplementing and improving the efficiency and accuracy of electromagnetic control, solving the problem in the prior art that it is difficult to comprehensively and intuitively display the electromagnetic suppression capability of the electromagnetic control equipment, and improving the control capability and combat effectiveness of the electromagnetic environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

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

[0073] Figure 2 A schematic diagram of the flow chart of the effective electromagnetic suppression distance prediction method provided by the present invention;

[0074] Figure 3 A schematic diagram of the structure of an effective electromagnetic suppression distance prediction device provided by the present invention;

[0075] Figure 4 A schematic diagram of the structure of an effective electromagnetic suppression distance prediction device provided by the present invention;

[0076] Figure 5 Normalized power spectrum density diagram of the electromagnetic control equipment provided by the present invention;

[0077] Figure 6 The FM walkie-talkie 25kHz channel spacing receiving spectrum template diagram provided by the present invention;

[0078] Figure 7 This is an analysis diagram of the electromagnetic control equipment provided by the present invention working at the same frequency as the intercom;

[0079] Figure 8 This is an analysis diagram of the situation where the working frequency of the electromagnetic control equipment provided by the present invention deviates from the intercom frequency by 8kHz;

[0080] Fig. 9 This is an analysis diagram of the electromagnetic control equipment provided by the present invention working in the adjacent channel of the walkie-talkie.

[0081] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0082] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0083] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein.

[0084] In the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific way.

[0085] The rapid development and widespread application of radio communication technology have brought profound changes to all walks of life and people's lives. For example, various types of radio stations, such as smart phones, navigation, telemetry and remote control, have shown explosive growth. The problem of unauthorized radio station intrusion has made key areas of major events face increasingly complex electromagnetic security threats. Not only does it disrupt normal communication order, but it also brings severe challenges such as anti-terrorism and explosion prevention, anti-drone operations, and information confidentiality. Traditional security protection methods seem to be powerless in the face of complex and changeable electromagnetic environments, and it is difficult to meet the needs of efficient and accurate electromagnetic control.

[0086] As an innovative electromagnetic control method, electromagnetic suppression technology 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, current electromagnetic suppression equipment has obvious deficiencies in describing and demonstrating its control capabilities, especially the lack of accurate description and intuitive display of key indicators such as effective suppression distance and maximum effective distance. The combined effect of these factors makes the evaluation of the electromagnetic suppression capability of electromagnetic control equipment complicated and difficult, and it is 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, existing situation presentation methods are mostly limited to field strength or power heat maps with electronic maps as the background. The electromagnetic control elements displayed are biased towards technology and are not conducive to decision-making. There is a lack of intuitive and comprehensive display of the electromagnetic suppression capabilities of electromagnetic control equipment. This limitation restricts control personnel from fully controlling the actual effectiveness of electromagnetic control equipment during deployment, scheduling, decision-making and command, which in turn affects the overall effect and efficiency of electromagnetic control.

[0088] Therefore, in response to the above problems, studying a situation presentation method that can comprehensively and intuitively display the electromagnetic suppression capability of electromagnetic control equipment has become a technical problem that needs to be solved in the field of electromagnetic control. This method will effectively improve the efficiency and accuracy of electromagnetic control and provide strong technical support for ensuring electromagnetic security in key areas.

[0089] The effective electromagnetic suppression distance prediction method, device, equipment and storage medium provided by the present invention obtains the spectrum characteristic parameters of both the electromagnetic 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 interference equivalent radiated power, and further calculates the effective electromagnetic suppression power of the target radio station in combination with the radio frequency protection rate, the harmful interference coefficient, etc., and calculates and outputs the effective suppression distance of the electromagnetic control equipment to the target radio station based on the above parameters. This method comprehensively considers various influencing factors in the electromagnetic control process, and realizes the precise quantification and intuitive presentation of the electromagnetic control capability.

[0090] Figure 1 This is an application scenario diagram of the effective electromagnetic suppression distance prediction method provided by the present invention. The electromagnetic control equipment implements electromagnetic suppression on the target radio station. The target radio station within the area enclosed 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-noise ratio it receives, which requires specific calculation.

[0091] The technical solution of the present invention and how to solve the above-mentioned technical problems will be described in detail below with reference to specific embodiments in conjunction with the accompanying drawings.

[0092] Figure 2 The flowchart of the effective electromagnetic suppression distance prediction method provided by the present invention is a detailed description of the effective electromagnetic suppression distance prediction method, which includes:

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

[0094] Step S202: According to the target radio station working center frequency f c and the maximum received power communication distance d o , calculate the radio wave propagation path loss L when the target station receives the maximum power p (f c ,d o ).

[0095] Specifically, the radio wave propagation path loss L when the target station receives the maximum power p (f c ,d o ) is calculated as:

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

[0097] Here, lg(·) represents a logarithmic function with base 10.

[0098] Understandably, here o Get the communication distance of the maximum receiving power for the target radio. For example, the maximum receiving power of two radios is generally set to the power received when the communication distance between the two radios is 30 meters under line of sight conditions. In summary, the maximum receiving power of the target radio can be estimated.

[0099] Step S203: According to the transmission 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 ), calculate the maximum receiving power P of the target radio station max .

[0100] Specifically, the maximum receiving power of the target station P max The calculation method is:

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

[0102] Among them, G r (θ c) is the receiving antenna gain in the communication link direction of the target radio station, and the receiving antenna gain in the communication link direction of the target radio station is obtained by finding the receiving antenna gain pattern G r (θ) c The corresponding value is obtained, θ c is the communication azimuth, that is, the angle between the true north direction and the communication link clockwise (see Figure 1 ).

[0103] It is understandable that the effective electromagnetic suppression of the target radio station is closely related to the electromagnetic control equipment, the spectrum characteristics of the target radio station, and the radio wave propagation in the suppression path between the electromagnetic control equipment and the target radio station. In the electromagnetic security assurance tasks of major events in key areas, the target radio stations that need to be controlled are difficult to calculate or evaluate the electromagnetic suppression effect due to unknown factors such as their geographical location, communication links, and radio wave transmission path losses. 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, that is, it suffers harmful interference, it is assumed that other radio stations will also suffer harmful interference under normal circumstances. The target radio station here can be a drone, walkie-talkie, or other type of communication radio station. In practice, the target radio station spectrum characteristic parameter P t , G t , G r (θ), maximum receiving power communication distance d o , spectrum receiving template |H(f) 2 , the communication signal radio frequency protection ratio PR, the harmful interference coefficient α, etc. are generally determined by the communication system, communication system standards or specifications, and the target radio station working center frequency f c It can be obtained through spectrum monitoring. Then, the maximum receiving power of the target radio station is the maximum receiving power of the target radio station obtained under the line-of-sight communication condition and at a reasonable and short communication distance in practical applications.

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

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

[0106]

[0107] Among them, △f is the working center frequency f of the electromagnetic control equipment i The target radio station's operating center frequency f c The difference betweeni -f c .

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

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

[0110] Specifically, the interference equivalent radiated power I e.i.r.p The calculation method is:

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

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

[0113] Step S206: According to the maximum receiving power P of the target station 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 effective electromagnetic suppression power I of the target radio station is calculated e .

[0114] Specifically, the effective electromagnetic suppression power of the target radio station is I e The calculation method is:

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

[0116] Among them, G r (θ i ) is the receiving antenna gain of the target station in the interference path direction, and the receiving antenna gain of the target station in the interference path direction is obtained by finding the receiving antenna gain pattern G r (θ) The value corresponding to θi in (θ) is obtained, θ i is the interference azimuth, i.e. the clockwise angle between the true north direction and the interference path (see Figure 1 ).

[0117] Further explanation: G r (θ i ) is the receiving antenna gain of the target radio station in the interference path direction. For mobile services, the radio station antenna generally uses an omnidirectional antenna. The isotropic omnidirectional antenna has the same receiving antenna gain in any horizontal direction, so G r (θ i )=G r (θ c ).

[0118] As you can understand, PR is the radio frequency protection rate of the communication signal. The PR of different modulation types is different, such as FM signal PR = 12dB. PR definition: In order for the useful signal at the output of the receiver to achieve the specified reception quality, the minimum ratio of the useful signal to the useless signal at the input of the receiver is determined under specified conditions, usually expressed in decibels. α is the harmful interference coefficient. In general, α = 6dB.

[0119] Step S207: According to 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 the effective electromagnetic suppression distance d e .

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

[0121]

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

[0123]

[0124] It is understandable that in order to better play the electromagnetic suppression role of electromagnetic control equipment, it is generally set up at a higher terrain to form line-of-sight propagation, so as to minimize the impact of electromagnetic suppression path loss. If it is not line-of-sight propagation, the relevant radio wave propagation model can be used for calculation.

[0125] The present invention is further described below in conjunction with simulation experiments. The simulation parameters are mainly derived from the measured data of an electromagnetic control equipment and relevant regulations of my country's communication equipment. If these parameters deviate from the actual ones, it will not affect the effective electromagnetic suppression distance prediction method given by the present invention. The simulation results are mainly used to demonstrate the practicality of the prediction method.

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

[0127] Simulation content: Prediction of effective electromagnetic suppression distance of walkie-talkies.

[0128] Simulation parameters: The interference power emitted by the electromagnetic control equipment S108A is 50W, the working center frequency is 440MHz, the omnidirectional transmitting antenna gain is 3dB, and the interference spectrum template is shown in Figure 5 ; The working center frequency of the walkie-talkie NXDN is 441.14MHz, the necessary bandwidth is 25kHz, the signal modulation type is FM, the omnidirectional antenna gain for transmission and reception is 1dB, the transmission power is 5W, and the receiving spectrum template is shown in Figure 6 , radio frequency protection rate 12dB, harmful interference coefficient 6dB.

[0129] Simulation results analysis:

[0130] When both the electromagnetic control equipment and the walkie-talkie operate at 441.140MHz, this is co-frequency interference. Figure 7 , frequency suppression factor FDR = 0dB, effective electromagnetic suppression distance is 317m; when the electromagnetic control equipment works at 441.148MHz and the walkie-talkie works at 441.140MHz, the frequency deviates from 8kHz suppression, and nearly half of the suppression power enters the walkie-talkie channel, FDR = 3.46dB, see Figure 8 , the effective suppression distance is 213m; when the electromagnetic control equipment works in the adjacent channel of the walkie-talkie, that is, the working frequency is 441.165MHz, see Fig. 9 , frequency suppression factor FDR = 70dB, effective electromagnetic suppression distance is 0m, and it is impossible to suppress the walkie-talkie.

[0131] Figure 3 A schematic diagram of the structure of an effective electromagnetic suppression distance prediction device provided by the present invention; Figure 3 As shown, the effective electromagnetic suppression distance prediction device 300 provided in this embodiment includes:

[0132] The acquisition module 301 is used to acquire the spectrum characteristic parameters of the electromagnetic control equipment and the spectrum characteristic parameters of the suppressed target radio station. The spectrum characteristic parameters of the electromagnetic control equipment include: the working center frequency f of the electromagnetic control equipment i , interference power spectral density Pi(f), interference antenna gain G i The spectrum characteristic parameters of the suppressed target radio station include: the target radio station working center frequency f c , Transmitting power P t , Transmitting antenna gain G t , receiving antenna gain pattern Gr(θ), maximum receiving power communication distance d o、Receive spectrum template |H(f) 2 , communication signal radio frequency protection ratio PR, harmful interference coefficient α;

[0133] The calculation module 302 is used to calculate the target radio station working center frequency f c and the maximum received power communication distance d o , calculate the radio wave propagation path loss L when the target station receives the maximum power p (f c ,d o );

[0134] The calculation module 302 is also used to calculate the transmission 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 ), calculate the maximum receiving power P of the target radio station 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 operating center frequency f c , the interference power spectrum density Pi(f) and the received spectrum template |H(f) 2 , calculate the frequency suppression factor FDR;

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

[0137] The calculation module 302 is also used to calculate the maximum receiving power P of the target station 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 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 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] Output module 303, the output module 303 is used to output the effective electromagnetic suppression distance d e .

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

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

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

[0143] Optionally, the calculation module 302 is specifically configured to calculate the transmission power P according to 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 ), use the following formula to calculate the maximum receiving power P of the target radio station max :

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

[0145] Among them, G r (θ c ) is the receiving antenna gain in the communication link direction of the target radio station, and the receiving antenna gain in the communication link direction of the target radio station is obtained by finding the receiving antenna gain pattern G r (θ) c The corresponding value is obtained, θ c It is the communication azimuth, that is, the angle between the true north direction and the communication link clockwise.

[0146] Optionally, the calculation module 302 is specifically configured to calculate the working center frequency f of the electromagnetic control equipment according to the working center frequency f i , the target radio station operating center frequency f c , the interference power spectrum density Pi(f) and the received spectrum template |H(f) 2 , the frequency suppression factor FDR is calculated using the following formula:

[0147]

[0148] Among them, △f is the working center frequency f of the electromagnetic control equipment i The target radio station's operating center frequency f c The difference between i -f c .

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

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

[0151] Among them, P i is the interference power of electromagnetic control equipment, P i =10·lg(∫P i (f)df).

[0152] Optionally, the calculation module 302 is specifically configured to calculate the maximum receiving power P of the target station according to 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 following formula is used to calculate the effective electromagnetic suppression power I of the target radio station: e :

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

[0154] Among them, G r (θ i ) is the receiving antenna gain of the target station in the interference path direction, and the receiving antenna gain of the target station in the interference path direction is obtained by finding the receiving antenna gain pattern G r (θ)i The corresponding value is obtained, θ i is the interference azimuth, that is, the clockwise angle between the true north direction and the interference path.

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

[0156]

[0157] Figure 4 The schematic diagram of the structure of the effective electromagnetic suppression distance prediction device provided by the present invention is as follows: Figure 4 As shown, the effective electromagnetic suppression distance prediction device 400 provided in this embodiment includes:

[0158] Memory 402;

[0159] Processor 401;

[0160] Wherein, the memory 402 stores computer-executable instructions;

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

[0162] The present invention also provides a computer storage medium, in which computer execution instructions are stored. When the computer execution instructions are executed by a processor, they are used to implement the effective electromagnetic suppression distance prediction method shown in the above embodiment.

[0163] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are 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 tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain 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 may include any information delivery media.

[0164] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The description and examples are to be considered exemplary only, and the true scope and spirit of the present invention is indicated by the following claims.

[0165] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for predicting effective electromagnetic suppression distance, characterized in that: The method comprises: Step S201: Acquire 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 working center frequency f of the electromagnetic control equipment i , interference power spectral density P i (f) Interference antenna gain G i The spectrum characteristic parameters of the suppressed target radio station include: the target radio station working center frequency f c , Transmitting power P t , Transmitting antenna gain G t , receiving antenna gain pattern Gr(θ), maximum receiving power communication distance d o 、Receive spectrum template |H(f) 2 , communication signal radio frequency protection ratio PR, harmful interference coefficient α; Step S202: According to the target radio station working center frequency f c and the maximum received power communication distance d o , calculate the radio wave propagation path loss L when the target station receives the maximum power p (f c ,d o ); Step S203: According to the transmission 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 ), calculate the maximum receiving power P of the target radio station max ; Step S204: According to the working center frequency f of the electromagnetic control equipment i , the target radio station operating center frequency f c , the interference power spectrum density Pi(f) and the received spectrum template H(f) 2 , calculate the frequency suppression factor FDR; Step S205: According to the interference power spectrum density Pi(f) and the interference antenna gain G i , calculate the interference equivalent radiated power I e.i.r.p ; Step S206: According to the maximum receiving power P of the target station 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 effective electromagnetic suppression power I of the target radio station is calculated e ; Step S207: According to 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 the effective electromagnetic suppression distance d e .

2. The method according to claim 1, characterized in that The step S202 includes: According to the target radio station working center frequency f c and the maximum received power communication distance d o , use the following formula to calculate the radio wave propagation path loss L when the target station has the maximum receiving power p (f c ,d o ): L p (f c ,d o )=32.4+20·lg(f c )+20·lg(d o ) Here, lg(·) represents a logarithmic function with base 10.

3. The method according to claim 1, characterized in that The step S203 includes: According to the transmission 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 ), use the following formula to calculate the maximum receiving power P of the target radio station max : P max =P t +G t -L p (f c ,d o )+G r (θ c ) Among them, G r (θ c ) is the receiving antenna gain in the communication link direction of the target radio station, and the receiving antenna gain in the communication link direction of the target radio station is obtained by finding the receiving antenna gain pattern G r (θ) c The corresponding value is obtained, θ c It is the communication azimuth, that is, the angle between the true north direction and the communication link clockwise.

4. The method according to claim 1, characterized in that: The step S204 includes: According to the working center frequency f of the electromagnetic control equipment i , the target radio station operating center frequency fc, the interference power spectrum density Pi(f) and the receiving spectrum template |H(f) 2 , the frequency suppression factor FDR is calculated using the following formula: Among them, △f is the working center frequency f of the electromagnetic control equipment i The target radio station's operating center frequency f c The difference between i -f c .

5. The method according to claim 1, characterized in that The step S205 includes: According to the interference power spectrum density Pi(f) and the interference antenna gain G i , use the following formula to calculate the interference equivalent radiated power I e.i.r.p : I e.i.r.p =P i +G i Among them, P i is the interference power of electromagnetic control equipment, P i =10·lg(∫P i (f)df).

6. The method according to claim 1, characterized in that The step S206 includes: According to the maximum receiving power P of the target station 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 following formula is used to calculate the effective electromagnetic suppression power I of the target radio station: e : I e =P max -PR+α+FDR-G r (θ i , Among them, G r (θ i ) is the receiving antenna gain of the target station in the interference path direction, and the receiving antenna gain of the target station in the interference path direction is obtained by finding the receiving antenna gain pattern G r (θ) i The corresponding value is obtained, θ i is the interference azimuth, that is, the clockwise angle between the true north direction and the interference path.

7. The method according to claim 1, characterized in that The step S207 includes: According to 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 , use the following formula to calculate the effective electromagnetic suppression distance d e :

8. An effective electromagnetic suppression distance prediction device, characterized in that: The device is applied to any one of claims 1 to 7 in the effective electromagnetic suppression distance prediction method, comprising: An acquisition module is used to acquire 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 working center frequency f of the electromagnetic control equipment i , interference power spectral density P i (f) Interference antenna gain G i The spectrum characteristic parameters of the suppressed target radio station include: the target radio station working center frequency f c , Transmitting power P t , Transmitting antenna gain G t , receiving antenna gain pattern Gr(θ), maximum receiving power communication distance d o 、Receive spectrum template |H(f) 2 , communication signal radio frequency protection ratio PR, harmful interference coefficient α; A calculation module is used to calculate the target radio station working center frequency f c and the maximum received power communication distance d o , calculate the radio wave propagation path loss L when the target station receives the maximum power p (f c ,d o ); The calculation module is also used to calculate the transmission 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 ), calculate the maximum receiving power P of the target radio station max ; The calculation module is also used to calculate the working center frequency f of the electromagnetic control equipment i , the target radio station operating center frequency f c , the interference power spectrum density P i (f) and the received spectrum template H(f) 2 , calculate the frequency suppression factor FDR; The calculation module is also used to calculate the interference power spectrum density P i (f) and the interference antenna gain G i , calculate the interference equivalent radiated power I e.i.r.p ; The calculation module is also used to calculate the maximum receiving power P of the target station 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 effective electromagnetic suppression power I of the target radio station is calculated e ; The calculation module 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 the effective electromagnetic suppression distance d e ; An output module, the output module is used to output the effective electromagnetic suppression distance d e .

9. An effective electromagnetic suppression distance prediction device, characterized in that: include: Memory; processor; Wherein, the memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the effective electromagnetic suppression distance prediction method according to any one of claims 1-7.

10. 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 effective electromagnetic suppression distance prediction method according to any one of claims 1 to 7.

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