Electromagnetic suppression maximum distance prediction method and device, equipment and storage medium

Abstract

The application provides an electromagnetic suppression maximum 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 electromagnetic management and control equipment spectrum characteristic parameters and suppressed target radio station spectrum characteristic parameters; calculating minimum harmful interference power, a frequency suppression factor and interference equivalent radiation power; calculating according to the electromagnetic management and control equipment spectrum characteristic parameters, the suppressed target radio station spectrum characteristic parameters, the frequency suppression factor, the minimum harmful interference power and the interference equivalent radiation power; and considering the earth great circle line-of-sight blocking factor to predict the electromagnetic suppression maximum distance. The application solves the problems that the existing electromagnetic management and control situation has a single influencing factor and low universality and low operation efficiency caused by field strength vector operation in the maximum distance prediction method, thereby improving the practicability of displaying the maximum management and control region of the electromagnetic management and control equipment in the electromagnetic management and control situation presentation, and improving the efficiency and accuracy of the electromagnetic management and control.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic spectrum management technology, and more specifically, to a method, apparatus, device, and storage medium for predicting the maximum distance of electromagnetic suppression. Background Technology

[0002] In critical events and security operations in key areas, electromagnetic control equipment effectively defends against unauthorized intrusions by drones, walkie-talkies, or other types of radio communication devices. Electromagnetic suppression utilizes jamming techniques to radiate interference signals at target radio stations, disrupting their communications. A comprehensive electromagnetic control posture report is typically used to present relevant information, including the controlled area, implementation time, type of controlled radio station, control methods, and control equipment. The controlled area is particularly important; accurately predicting the maximum coverage area of ​​the electromagnetic control equipment is crucial for personnel to deploy, schedule, and make informed decisions regarding its use.

[0003] Currently, the technology for predicting the maximum distance for electromagnetic control is not mature and has limited applications. Some prediction methods consider only one influencing factor, resulting in poor practicality. Some prediction methods use vector calculations, which are cumbersome and have low computational efficiency, making it difficult to meet the needs of rapid response.

[0004] Therefore, how to comprehensively consider the influencing factors of various maximum distance prediction methods and use a simple calculation method to predict the maximum distance of electromagnetic control in the context of electromagnetic control is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The main objective of this invention is to provide a method, apparatus, device, and storage medium for predicting the maximum distance of electromagnetic suppression, so as to at least solve the problems of the limited versatility and low computational efficiency caused by the single influencing factor considered in the existing electromagnetic control situation prediction method and the use of field strength vector calculation, thereby improving the practicality of displaying the maximum control area of ​​electromagnetic control equipment in the electromagnetic control situation presentation.

[0006] To achieve the above objectives, the present invention provides a method, apparatus, device, and storage medium for predicting the maximum distance of electromagnetic suppression. It comprehensively considers the influence of the characteristics of multiple domains of the electromagnetic spectrum, such as the frequency domain, spatial domain, energy domain, and modulation domain, and quickly predicts the maximum distance of electromagnetic suppression through simple power scalar calculation, thereby improving the practicality and accuracy of electromagnetic suppression maximum distance prediction.

[0007] In a first aspect, the present invention provides a method for predicting the maximum distance of electromagnetic suppression, the method comprising the following steps:

[0008] Step S201: Obtain the spectral characteristic parameters of the electromagnetic control equipment and the spectral characteristic parameters of the suppressed target radio station, wherein the spectral characteristic parameters of the electromagnetic control equipment include: transmit power spectral density P i (f) The working frequency f of the electromagnetic control equipment i Transmit antenna gain pattern G i (θ), effective height of transmitting antenna h i The spectral characteristic parameters of the suppressed target radio station include: the target radio station's operating center frequency f. c Target radio station operating bandwidth B, receiving antenna gain pattern G r (θ), receiver noise figure NF, effective antenna height h r Received spectrum template |H(f)| 2 Harmful interference coefficient α;

[0009] Step S202: Based on the target radio station's operating bandwidth B, the receiver noise figure NF, the harmful interference figure α, and the receiving antenna gain pattern G... r (θ), calculate the minimum harmful interference power I experienced by the target radio station. min ;

[0010] Step S203: Based on the transmitted power spectral density P i (f) The target radio station receives a spectrum template |H(f)| 2 The electromagnetic control equipment operates at a central frequency f. i The target radio station's operating center frequency f c Calculate the frequency suppression factor FDR;

[0011] Step S204: According to the transmit antenna gain pattern G i (θ), the emission power spectral density P i (f) Calculate the equivalent radiated power I of the interference. e.i.r.p ;

[0012] Step S205: Based on the receiving antenna gain G r (θ i The target radio station's operating bandwidth B and the electromagnetic control equipment's operating center frequency f i The receiver noise figure NF, the harmful interference figure α, the frequency suppression factor FDR, and the minimum harmful interference power I min The interference equivalent radiated power I e.i.r.p The effective height h of the receiving antenna r The effective height h of the transmitting antenna i Perform calculations, predict and output the maximum electromagnetic suppression distance d max .

[0013] Further, step S202 includes:

[0014] Based on the target radio station's operating bandwidth B, the receiver noise figure NF, the harmful interference figure α, and the receiving antenna gain pattern G. r The minimum harmful interference power I is calculated using the following formula (θ). min :

[0015] I min =10·lg(KTB)+NF+α-G r (θ i )

[0016] Where lg(·) represents the logarithmic function to base 10, K is the Boltzmann constant, T is the Kelvin temperature at room temperature, and G... r (θ i The target radio receiver antenna gain in the direction of the interference path is defined as G, which is obtained by looking up the receiver antenna gain pattern G. r (θ) in θ i The corresponding value is obtained, θ i The interference azimuth is the angle between true north and the interference path clockwise.

[0017] Further, step S203 includes:

[0018] According to the emission power spectral density P i (f) The received spectrum template |H(f)| 2 The electromagnetic control equipment operates at a central frequency f. i The target radio station's operating center frequency f c The frequency suppression factor FDR is calculated using the following formula:

[0019]

[0020] Where △f is the operating center frequency f of the electromagnetic control equipment. i With the target radio station's working center frequency f c The difference, i.e., Δf = f i -f c .

[0021] Further, step S204 includes:

[0022] According to the transmit antenna gain pattern G i (θ), the emission power spectral density P i (f) The equivalent radiated power I of the interference is calculated using the following formula. e.i.r.p :

[0023] I e.i.r.p =P i +G i (θ i ')

[0024] Among them, P i For the transmission power of electromagnetic control equipment, P i =10·lg(∫P i (f)df), G i (θ i ') represents the gain of the transmitting antenna in the direction of the interference path of the electromagnetic control equipment. The gain of the transmitting antenna in the direction of the interference path of the electromagnetic control equipment is obtained by looking up the gain pattern G of the transmitting antenna. i (θ) in θ i 'Retrieve the corresponding value, θ' i ' is the interference azimuth angle, i.e., the angle between true north and the interference path clockwise, and θ i '=θ i +180.

[0025] Further, step S205 includes:

[0026] According to the receiving antenna gain G r (θ i The target radio station's operating bandwidth B and the electromagnetic control equipment's operating center frequency f i The receiver noise figure NF, the harmful interference figure α, the frequency suppression factor FDR, and the minimum harmful interference power I min The interference equivalent radiated power I e.i.r.p The effective height h of the receiving antenna r The effective height h of the transmitting antenna i Calculate the electromagnetic suppression path distance d p And the apparent distance d of a smooth Earth sphere los ;

[0027] According to the apparent distance d on the smooth Earth sphere los and the distance d of the electromagnetic suppression path p Calculate the maximum electromagnetic suppression distance d max ;

[0028] Specifically, according to the receiving antenna gain G r (θ i The target radio station's operating bandwidth B and the electromagnetic control equipment's operating center frequency f i The receiver noise figure NF, the harmful interference figure α, the frequency suppression factor FDR, and the minimum harmful interference power I minThe interference equivalent radiated power I e.i.r.p The electromagnetic suppression path distance d is calculated using the following formula. p :

[0029]

[0030] Specifically, based on the effective height h of the transmitting antenna i and the effective height h of the receiving antenna r The following formula is used to calculate the apparent distance d on a smooth Earth sphere. los :

[0031]

[0032] Specifically, based on the apparent distance d of the smooth Earth sphere los and the distance d of the electromagnetic suppression path p The maximum electromagnetic suppression distance d is calculated using the following formula. max :

[0033] d max =min{d los ,d p} / K e

[0034] Where, min{d los ,d p} indicates taking d los and d p The minimum of the two values, K e K is the equivalent Earth radius coefficient. e =4 / 3.

[0035] In a second aspect, the present invention provides an electromagnetic suppression maximum distance prediction device, the device being applied to various possible embodiments of the first aspect, including:

[0036] The acquisition module is used to execute step S201: acquiring the spectral characteristic parameters of the electromagnetic control equipment and the spectral characteristic parameters of the suppressed target radio station, wherein the spectral characteristic parameters of the electromagnetic control equipment include: transmit power spectral density P. i (f) The working frequency f of the electromagnetic control equipment i Transmit antenna gain pattern G i (θ), effective height of transmitting antenna h i The spectral characteristic parameters of the suppressed target radio station include: the target radio station's operating center frequency f. c Target radio station operating bandwidth B, receiving antenna gain pattern G r (θ), receiver noise figure NF, effective antenna height h rReceived spectrum template |H(f)| 2 Harmful interference coefficient α;

[0037] The calculation module is used to execute step S202: based on the target radio station's operating bandwidth B, the receiver noise figure NF, the harmful interference figure α, and the receiving antenna gain pattern G. r (θ), calculate the minimum harmful interference power I of the target radio station. min ;

[0038] The calculation module is also used to execute step S203: based on the transmitted power spectral density P i (f) The received spectrum template |H(f)| 2 The electromagnetic control equipment operates at a central frequency f. i The target radio station's operating center frequency f c Calculate the frequency suppression factor FDR;

[0039] The calculation module is also used to execute step S204: based on the transmit antenna gain pattern G i (θ), the emission power spectral density P i (f) Calculate the equivalent radiated power I of the interference. e.i.r.p ;

[0040] The calculation module is further configured to perform step S205: based on the receiving antenna gain G r (θ i The target radio station's operating bandwidth B and the electromagnetic control equipment's operating center frequency f i The receiver noise figure NF, the harmful interference figure α, the frequency suppression factor FDR, and the minimum harmful interference power I min The interference equivalent radiated power I e.i.r.p The effective height h of the receiving antenna r The effective height h of the transmitting antenna i Perform calculations, predict and output the maximum electromagnetic suppression distance d max ;

[0041] The output module is used to execute step S205: output the maximum electromagnetic suppression distance d. max .

[0042] Optionally, the calculation module is specifically used to calculate based on the target radio station's operating bandwidth B, the receiver noise figure NF, the harmful interference figure α, and the receiving antenna gain pattern G. r The minimum harmful interference power I is calculated using the following formula (θ). min :

[0043] I min =10·lg(KTB)+NF+α-G r (θ i )

[0044] Where lg(·) represents the logarithmic function to base 10, K is the Boltzmann constant, T is the Kelvin temperature at room temperature, and G... r (θ i The target radio receiver antenna gain in the direction of the interference path is defined as G, which is obtained by looking up the receiver antenna gain pattern G. r (θ) in θ i The corresponding value is obtained, θ i The interference azimuth is the angle between true north and the interference path clockwise.

[0045] Optionally, the calculation module is specifically used to calculate based on the transmit power spectral density P. i (f) The received spectrum template |H(f)| 2 The electromagnetic control equipment operates at a central frequency f. i The target radio station's operating center frequency f c The frequency suppression factor FDR is calculated using the following formula:

[0046]

[0047] Where △f is the operating center frequency f of the electromagnetic control equipment. i With the target radio station's working center frequency f c The difference, i.e., Δf = f i -f c .

[0048] Optionally, the calculation module is specifically used to calculate based on the transmit antenna gain pattern G. i (θ), the emission power spectral density P i (f) The equivalent radiated power I of the interference is calculated using the following formula. e.i.r.p :

[0049] I e.i.r.p =P i +G i (θ i ')

[0050] Among them, P i For the transmission power of electromagnetic control equipment, P i =10·lg(∫P i (f)df), G i (θ i') represents the transmitting antenna gain in the direction of the interference path of the electromagnetic control equipment. The transmitting antenna gain in the direction of the interference path of the electromagnetic control equipment is obtained by looking up the transmitting antenna gain pattern G. i (θ) in θ i 'Retrieve the corresponding value, θ' i ' is the interference azimuth angle, i.e., the angle between true north and the interference path clockwise, and θ i '=θ i +180.

[0051] Optionally, the calculation module is specifically used to calculate based on the receiving antenna gain G. r (θ i The target radio station's operating bandwidth B and the electromagnetic control equipment's operating center frequency f i The receiver noise figure NF, the harmful interference figure α, the frequency suppression factor FDR, and the minimum harmful interference power I min The interference equivalent radiated power I e.i.r.p The electromagnetic suppression path distance d is calculated using the following formula. p :

[0052]

[0053] Optionally, the calculation module is specifically used to calculate based on the effective height h of the transmitting antenna. i and the effective height h of the receiving antenna r The following formula is used to calculate the apparent distance d on a smooth Earth sphere. los :

[0054]

[0055] Optionally, the calculation module is specifically used to calculate the apparent distance d on the smooth Earth sphere. los and the distance d of the electromagnetic suppression path p The maximum electromagnetic suppression distance d is calculated using the following formula. max :

[0056] d max =min{d los ,d p} / K e

[0057] Where, min{d los ,d p} indicates taking d los and d p The minimum of the two values, K e K is the equivalent Earth radius coefficient. e =4 / 3.

[0058] Thirdly, the present invention provides an electromagnetic suppression maximum distance prediction device, the device comprising:

[0059] Memory;

[0060] processor;

[0061] The memory stores computer-executed instructions;

[0062] The processor executes computer execution instructions stored in the memory to implement the first aspect and / or various possible electromagnetic suppression maximum distance prediction methods as described above.

[0063] Fourthly, the present invention provides a computer storage medium storing computer execution instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible electromagnetic suppression maximum distance prediction methods described above.

[0064] The present invention provides a method, apparatus, device, and storage medium for predicting the maximum distance of electromagnetic suppression. The method calculates the minimum harmful interference power I by acquiring the spectral characteristic parameters of the electromagnetic control equipment and the spectral characteristic parameters of the suppressed target radio station. min Frequency suppression factor (FDR) and interference equivalent radiated power (I) e.i.r.p Based on the spectral characteristic parameters of the electromagnetic control equipment, the spectral characteristic parameters of the suppressed target radio station, the frequency suppression factor (FDR), and the minimum harmful interference power (I), min and interference equivalent radiated power I e.i.r.p Calculations are performed to predict the maximum electromagnetic suppression distance. This maximum electromagnetic suppression distance can be used as a comprehensive indicator of electromagnetic control effectiveness in the presentation of electromagnetic situation. This method incorporates relevant important spectral characteristic parameters into the calculation, considering the multi-domain characteristics of the electromagnetic spectrum, including the frequency, spatial, energy, and modulation domains. This method addresses the problems of existing electromagnetic control situation prediction methods, such as considering only a single influencing factor and using field strength vector calculations, resulting in weak versatility and low computational efficiency. Therefore, it improves the practicality of displaying the maximum control area of ​​electromagnetic control equipment in electromagnetic situation presentation. Attached Figure Description

[0065] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0066] Figure 1 This is an application scenario diagram of the electromagnetic suppression maximum distance prediction method provided by the present invention;

[0067] Figure 2A flowchart illustrating the electromagnetic suppression maximum distance prediction method provided by this invention;

[0068] Figure 3 A simulation diagram of the spectrum template of the electromagnetic control equipment for the electromagnetic suppression maximum distance prediction method provided by the present invention;

[0069] Figure 4 Simulation diagram of the spectrum template received by the target radio station for the electromagnetic suppression maximum distance prediction method provided by the present invention;

[0070] Figure 5 An analysis diagram of the target radio station's co-frequency suppression situation in the electromagnetic suppression maximum distance prediction method provided by this invention;

[0071] Figure 6 A graph showing the relationship between the maximum electromagnetic suppression distance of the target radio station and its transmission power in the electromagnetic suppression maximum distance prediction method provided by this invention.

[0072] Figure 7 A graph showing the relationship between the maximum electromagnetic suppression distance of the target radio station and the height of the transmitting antenna in the electromagnetic suppression maximum distance prediction method provided by this invention.

[0073] Figure 8 A schematic diagram of the electromagnetic suppression maximum distance prediction device provided by the present invention;

[0074] Figure 9 This is a schematic diagram of the electromagnetic suppression maximum distance prediction device provided by the present invention.

[0075] The accompanying drawings have illustrated specific embodiments of the invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0076] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0077] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein.

[0078] In this invention, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0079] In critical events and security operations in key areas, electromagnetic control equipment effectively defends against unauthorized intrusions by drones, walkie-talkies, or other types of radio communication devices. Electromagnetic suppression utilizes jamming techniques to radiate interference signals at target radio stations, disrupting their communications. A comprehensive display of electromagnetic control information is typically presented using a situational awareness model, including the controlled area, implementation time, type of controlled radio station, control methods, and control equipment. The controlled area is particularly crucial; accurately predicting the maximum coverage area is essential for deploying and scheduling control personnel, as well as for decision-making and command.

[0080] Currently, the technology for predicting the maximum distance for electromagnetic control is not mature and has limited applications. Some prediction methods consider only one influencing factor, resulting in poor practicality. Some prediction methods use vector calculations, which are cumbersome and have low computational efficiency, making it difficult to meet the needs of rapid response.

[0081] Therefore, how to quickly predict the maximum distance of electromagnetic suppression while taking into account multiple influencing factors is a problem that needs to be solved by those skilled in the art.

[0082] The present invention provides a method, apparatus, device, and storage medium for predicting the maximum distance of electromagnetic suppression. The method calculates the minimum harmful interference power I by acquiring the spectral characteristic parameters of the electromagnetic control equipment and the spectral characteristic parameters of the suppressed target radio station. min Frequency suppression factor (FDR) and interference equivalent radiated power (I) e.i.r.p Based on the spectral characteristic parameters of the electromagnetic control equipment, the spectral characteristic parameters of the suppressed target radio station, the frequency suppression factor (FDR), and the minimum harmful interference power (I), min and interference equivalent radiated power I e.i.r.pThe method calculates and predicts the maximum electromagnetic suppression distance. It incorporates relevant important spectral characteristic parameters from multiple domains of the electromagnetic spectrum, including the frequency, spatial, energy, and modulation domains, to participate in the calculation. This solves the problems of existing electromagnetic control situation prediction methods, such as considering only one influencing factor and using field strength vectors for calculation, resulting in weak versatility and low computational efficiency. Therefore, it improves the practicality of displaying the maximum control area of ​​electromagnetic control equipment in electromagnetic control situation presentation, and enhances the efficiency and accuracy of electromagnetic control.

[0083] Figure 1 This is an application scenario diagram of the electromagnetic suppression maximum distance prediction method provided by the present invention, such as... Figure 1 The diagram illustrates a typical application scenario for electromagnetic suppression to which this invention is applicable. The electromagnetic control equipment will not target areas located at the maximum suppression distance d. max The communication of target radio stations outside the area is affected, such as the target radio station (receiving end) on communication link 1; located at the maximum suppression distance d. max Whether communication stations within the area are suffering from harmful interference requires further specific calculations, such as the target station (receiving end) of communication link 2.

[0084] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0085] This embodiment uses an actual high-power transmitting device S108A as the electromagnetic control equipment and an NXDN walkie-talkie as the target radio for simulation. The spectral characteristics of the electromagnetic control equipment were obtained through actual measurements, while the spectral characteristics of the target radio were obtained from the technical manual and specifications. The electromagnetic control equipment has a transmitting power of 50W, an operating center frequency of 441.14MHz, an omnidirectional transmitting antenna gain of 1.5dB, an transmitting antenna height of 60m, and an average ground obstacle height of 3m. The target radio has an operating center frequency of 441.14MHz, a bandwidth of 16kHz, a signal modulation type of FM, an omnidirectional antenna gain of 1dB, a receiving antenna height of 3m, a noise figure of 5dB, and a harmful interference factor of 6dB.

[0086] Figure 2 This is a flowchart illustrating the electromagnetic suppression maximum distance prediction method provided by the present invention. A detailed description of the electromagnetic suppression maximum distance prediction method follows, as follows: Figure 2 As shown, the electromagnetic suppression maximum distance prediction method provided by the present invention includes:

[0087] Step S201: Obtain the spectral characteristic parameters of the electromagnetic control equipment and the spectral characteristic parameters of the suppressed target radio station, wherein the spectral characteristic parameters of the electromagnetic control equipment include: transmit power spectral density P i (f) Electromagnetic control equipment operating center frequency fi, transmitting antenna gain pattern G i (θ), effective height of transmitting antenna h i The spectral characteristic parameters of the suppressed target radio station include: the target radio station's operating center frequency f. c Target radio station operating bandwidth B, receiving antenna gain pattern G r (θ), receiver noise figure NF, effective antenna height h r Received spectrum template |H(f)| 2 Harmful interference coefficient α.

[0088] Specifically, the spectrum characteristic parameters of the electromagnetic control equipment and the spectrum characteristic parameters of the suppressed target radio station are obtained according to industry standards or specifications, product technical manuals, etc., or through radio monitoring and direction finding systems.

[0089] Figure 3 This is a simulation diagram of the measured data of the spectrum template of the electromagnetic control equipment used in the electromagnetic suppression maximum distance prediction method provided by this invention. The spectrum template of the electromagnetic control equipment is the normalized power spectral density of the transmitted signal, which describes the distribution of signal power with frequency. Figure 3 This reflects the characteristics of the radio frequency bandpass filter when the electromagnetic control equipment transmits signals.

[0090] Figure 4 The simulation diagram of the target radio station receiving spectrum template for the electromagnetic suppression maximum distance prediction method provided by the present invention reflects the characteristics of the passband filter when the target radio station receives the signal. According to the ITU-R M.478.5 recommendation on the technical characteristics and channel allocation principles of terrestrial mobile service equipment in the frequency band of 25MHz to 3GHz, the passband range of the filter is approximately ±8kHz, and the out-of-band signal attenuation requirement is 70dB.

[0091] Step S202: Based on the target radio station's operating bandwidth B, the receiver noise figure NF, the harmful interference figure α, and the receiving antenna gain pattern G... r (θ), calculate the minimum harmful interference power I of the target radio station. min ;

[0092] Specifically, the minimum harmful interference power I min This refers to the minimum power value of the harmful interference signal that the target radio station suffers when it is operating at the lowest power required for normal operation. The minimum harmful interference power I at the antenna port of the target radio station is... min The calculation method is as follows:

[0093] I min =S-PR+α-G r (θ i )

[0094] Where S is the demodulation receiver sensitivity of the target radio station, PR is the radio frequency protection rate, the demodulation receiver sensitivity S and the radio frequency protection rate PR are obtained by acquiring the spectral characteristic parameters of the suppressed target radio station, α is the harmful interference coefficient (generally taken as 6dB), and G r (θ i The target radio station's receiving antenna gain in the direction of the interference path is defined as G, which is obtained by finding the receiving antenna gain pattern G. r (θ) in θ i The corresponding value is obtained, θ i The interference azimuth is the angle between true north and the interference path clockwise.

[0095] Based on demodulation receiver sensitivity S and noise floor N floor The relationship is as follows:

[0096] S = N floor +PR

[0097] Where N floor The target radio station's noise floor is mainly determined by the thermal noise and noise figure generated by the thermal motion of charged particles, and the specific calculation is as follows:

[0098] N floor =10·log(KTB)+NF

[0099] Where K is the Boltzmann constant (1.38 × 10⁻⁶). -23 T is the target radio station's ambient Kelvin temperature (300°C), B is the target radio station's operating bandwidth, and NF is the noise figure;

[0100] The method for calculating the minimum harmful interference power of a target radio station at the antenna port end under normal circumstances is as follows:

[0101] I min =10·lg(KTB)+NF+α-G r (θ i )

[0102] Where lg(·) is a logarithmic function to base 10, K is the Boltzmann constant, T is the Kelvin temperature at room temperature, B is the operating bandwidth of the target radio station, and G... r (θ i The received antenna gain of the target radio station in the direction of the interference path is defined as G, which is obtained by looking up the received antenna gain pattern G. r (θ) in θi The corresponding value is obtained, θ i The interference path azimuth is the angle between true north and the suppression path clockwise, see [reference needed]. Figure 1 .

[0103] Step S203: Based on the transmitted power spectral density P i (f) The received spectrum template |H(f)| 2 The electromagnetic control equipment operates at a central frequency f. i The target radio station's operating center frequency f c The frequency suppression factor FDR is calculated using the following formula;

[0104] Specifically, the frequency suppression factor (FDR) characterizes the normalized interference amount of radio signals emitted by electromagnetic control equipment with certain transmit power spectral density characteristics in the frequency domain entering the operating channel of a target radio station. The specific calculation method is as follows:

[0105]

[0106] Where △f is the operating center frequency f of the electromagnetic control equipment. i With the target radio station's working center frequency f c The difference, i.e., Δf = f i -f c .

[0107] Step S204: According to the transmit antenna gain pattern G i (θ), the emission power spectral density P i (f) The equivalent radiated power of the interference I is calculated using the following formula. e.i.r.p ;

[0108] I e.i.r.p =P i +G i (θ i ')

[0109] Among them, P i The transmission power of the electromagnetic control equipment is calculated using the following formula:

[0110] P i =10·lg(∫P i (f)df)

[0111] Among them, G i (θ i ') represents the transmitting antenna gain of the electromagnetic control equipment in the direction of the interference path. The transmitting antenna gain of the electromagnetic control equipment in the direction of the interference path is determined by looking up the transmitting antenna gain pattern G. i (θ) in θ i'Retrieve the corresponding value, θ' i ' is the interference azimuth angle, i.e., the angle between true north and the interference path clockwise, and θ i '=θ i +180, see Figure 1 .

[0112] Step S205: Based on the receiving antenna gain G r (θ i The target radio station's operating bandwidth B and the electromagnetic control equipment's operating center frequency f i The receiver noise figure NF, the harmful interference figure α, the frequency suppression factor FDR, and the minimum harmful interference power I min The interference equivalent radiated power I e.i.r.p The effective height h of the receiving antenna r The effective height h of the transmitting antenna i Perform calculations, predict and output the maximum electromagnetic suppression distance d max .

[0113] To better leverage the electromagnetic suppression capabilities of electromagnetic control equipment, it is typically installed at higher elevations to achieve line-of-sight propagation, thereby minimizing the impact of electromagnetic suppression path loss. Therefore, the electromagnetic suppression path loss is calculated using the free-space propagation loss method. The equivalent radiated power of the minimum effective electromagnetic suppression experienced by the target radio station can then be calculated as follows:

[0114] Specifically, based on the interference equivalent radiated power variable I e.i.r.p An identity can be established to calculate the maximum electromagnetic suppression distance and the equivalent radiated power variable I of the interference. e.i.r.p Another calculation method is as follows:

[0115] I e.i.r.p =I min +32.4+20·lg(f i )+20·lg(d p )+FDR

[0116] The electromagnetic suppression path distance d can be obtained. p The calculation formula is:

[0117]

[0118] For long-distance wireless communication, the obstruction of radio wave propagation caused by the curvature of the Earth's surface must be considered. The line-of-sight distance d on a smooth Earth's surface. los The calculation method is as follows:

[0119]

[0120] Among them, h i and h r The height of the transmitting antenna for the electromagnetic control equipment and the receiving antenna for the target radio station are respectively set. To eliminate the influence of ground features such as buildings and vegetation, the height is generally h. i and h r The effective antenna height is the antenna height after subtracting the average height of surrounding features (such as buildings, vegetation, walls, etc.); K e K is the equivalent Earth radius coefficient, which is the value under standard atmospheric refraction. e =4 / 3. Equivalent Earth radius coefficient K e It is mainly used to eliminate the effect of radio waves being bent towards the ground due to atmospheric refraction, which is not a straight line. This is equivalent to expanding the Earth's radius by 4 / 3 times.

[0121] Finally, based on the apparent distance d on the smooth Earth sphere... los The electromagnetic suppression path distance d p The maximum electromagnetic suppression distance d is calculated using the following formula. max :

[0122] d max =min{d los ,d p} / K e

[0123] Where, min{d los ,d p} indicates taking d los and d p The minimum of the two values.

[0124] Figure 5 This diagram illustrates the co-frequency suppression of a target radio station using the electromagnetic suppression maximum distance prediction method provided by this invention. Figure 5 The frequency response characteristics of the electromagnetic control equipment and the target radio station were analyzed. When the center frequency (441.14MHz) and bandwidth (approximately 16kHz) are the same, the electromagnetic control equipment has the best suppression effect on the target radio station.

[0125] Figure 6 The diagram shows the relationship between the maximum electromagnetic suppression distance of the target radio station and the transmission power in the electromagnetic suppression maximum distance prediction method provided by this invention. The transmission power parameters of the electromagnetic control equipment are changed, and the transmission power is set to 50W, 100W, 200W, 300W, 400W and 500W respectively. The maximum electromagnetic suppression distance of the walkie-talkie remains unchanged at 23.3km.

[0126] Figure 7The diagram illustrates the relationship between the maximum electromagnetic suppression distance of a target radio station and the height of the transmitting antenna, as provided in this invention, for the electromagnetic suppression maximum distance prediction method. By changing the transmitting antenna height parameters of the electromagnetic control equipment, and setting the transmitting antenna heights to 5m, 10m, 20m, 30m, 40m, 60m, 80m, and 100m respectively, the corresponding maximum electromagnetic suppression distances are 4.4km, 8.2km, 12.7km, 16.1km, 18.8km, 23.3km, 27.1km, and 30.4km respectively.

[0127] pass Figure 6 and Figure 7 Simulations show that the power loss in radio wave propagation caused by the curvature of the Earth's surface is one of the main factors affecting the maximum distance of electromagnetic suppression; increasing the transmission power does not necessarily increase the maximum distance of electromagnetic suppression. In practical applications, it is also necessary to consider raising the transmitting antenna of the electromagnetic control equipment as high as possible to effectively increase the electromagnetic control area.

[0128] Figure 8 A schematic diagram of the electromagnetic suppression maximum distance prediction device provided by the present invention is shown below. Figure 8 As shown, the electromagnetic suppression maximum distance prediction device 800 provided in this embodiment includes:

[0129] The acquisition module 801 is used to execute step S201: acquiring the spectral characteristic parameters of the electromagnetic control equipment and the spectral characteristic parameters of the suppressed target radio station, wherein the spectral characteristic parameters of the electromagnetic control equipment include: transmit power spectral density P. i (f) The working frequency f of the electromagnetic control equipment i Transmit antenna gain pattern G i (θ), effective height of transmitting antenna h i The spectral characteristic parameters of the suppressed target radio station include: the target radio station's operating center frequency f. c Target radio station operating bandwidth B, receiving antenna gain pattern G r (θ), receiver noise figure NF, effective antenna height h r Received spectrum template |H(f)| 2 Harmful interference coefficient α;

[0130] Calculation module 802 is used to execute step S202: based on the target radio station operating bandwidth B, the receiver noise figure NF, the harmful interference figure α, and the receiving antenna gain pattern G. r (θ), calculate the minimum harmful interference power I min ;

[0131] The calculation module 802 is further configured to execute step S203: based on the transmitted power spectral density P i(f) The received spectrum template |H(f)| 2 The electromagnetic control equipment operates at a central frequency f. i The target radio station's operating center frequency f c Calculate the frequency suppression factor FDR;

[0132] The calculation module 802 is further configured to execute step S204: based on the transmit antenna gain pattern G i (θ), the emission power spectral density P i (f) Calculate the equivalent radiated power I of the interference. e.i.r.p ;

[0133] The calculation module 802 is further configured to execute step S205: based on the receiving antenna gain G r (θ i The target radio station's operating bandwidth B and the electromagnetic control equipment's operating center frequency f i The receiver noise figure NF, the harmful interference figure α, the frequency suppression factor FDR, and the minimum harmful interference power I min The interference equivalent radiated power I e.i.r.p The effective height h of the receiving antenna r The effective height h of the transmitting antenna i Perform calculations, predict and output the maximum electromagnetic suppression distance d max ;

[0134] Output module 803 is used to execute step S205: output the maximum electromagnetic suppression distance d max .

[0135] Optionally, the calculation module 802 is specifically used to calculate based on the target radio station's operating bandwidth B, the receiver noise figure NF, the harmful interference figure α, and the receiving antenna gain pattern G. r The minimum harmful interference power I is calculated using the following formula (θ). min :

[0136] I min =10·lg(KTB)+NF+α-G r (θ i )

[0137] Where lg(·) represents the logarithmic function to base 10, K is the Boltzmann constant, T is the Kelvin temperature at room temperature, and G... r (θ i The target radio receiver antenna gain in the direction of the interference path is defined as G, which is obtained by looking up the receiver antenna gain pattern G. r (θ) in θi The corresponding value is obtained, θ i The interference azimuth is the angle between true north and the interference path clockwise.

[0138] Optionally, the calculation module 802 is specifically used to calculate based on the transmitted power spectral density P. i (f) The received spectrum template |H(f)| 2 The electromagnetic control equipment operates at a central frequency f. i The target radio station's operating center frequency f c The frequency suppression factor FDR is calculated using the following formula:

[0139]

[0140] Wherein, Δf is the operating center frequency f of the electromagnetic control equipment. i The target radio station's operating center frequency f c The difference, i.e., Δf = f i -f c .

[0141] Optionally, the calculation module 802 is specifically used to calculate based on the transmit antenna gain pattern G. i (θ), the emission power spectral density P i (f) The equivalent radiated power I of the interference is calculated using the following formula. e.i.r.p :

[0142] I e.i.r.p =P i +G i (θ i ')

[0143] Among them, P i For the transmission power of electromagnetic control equipment, P i =10·lg(∫P i (f)df), G i (θ i ') represents the transmitting antenna gain in the direction of the interference path of the electromagnetic control equipment. The transmitting antenna gain in the direction of the interference path of the electromagnetic control equipment is obtained by looking up the transmitting antenna gain pattern G. i (θ) in θ i 'Retrieve the corresponding value, θ' i ' is the interference azimuth angle, i.e., the angle between true north and the interference path clockwise, and θ i '=θ i +180.

[0144] Optionally, the calculation module 802 is specifically used to calculate based on the receiving antenna gain G. r (θ iThe target radio station's operating bandwidth B and the electromagnetic control equipment's operating center frequency f i The receiver noise figure NF, the harmful interference figure α, the frequency suppression factor FDR, and the minimum harmful interference power I min The interference equivalent radiated power I e.i.r.p The electromagnetic suppression path distance d is calculated using the following formula. p :

[0145]

[0146] Optionally, the calculation module 802 is specifically used to calculate based on the effective height h of the transmitting antenna. i and the effective height h of the receiving antenna r The following formula is used to calculate the apparent distance d on a smooth Earth sphere. los :

[0147]

[0148] Optionally, the calculation module 802 is specifically used to calculate the apparent distance d on the smooth Earth sphere. los and the distance d of the electromagnetic suppression path p The maximum electromagnetic suppression distance d is calculated using the following formula. max :

[0149] d max =min{d los ,d p} / K e

[0150] Where, min{d los ,d p} indicates taking d los and d p The minimum of the two values, K e K is the equivalent Earth radius coefficient. e =4 / 3.

[0151] Figure 9 This is a schematic diagram of the electromagnetic suppression maximum distance prediction device provided by the present invention, as shown below. Figure 9 As shown, the electromagnetic suppression maximum distance prediction device 900 provided in this embodiment includes:

[0152] Memory 902;

[0153] Processor 901;

[0154] The memory 902 stores computer-executed instructions;

[0155] The processor 901 executes computer execution instructions stored in the memory to implement various possible electromagnetic suppression maximum distance prediction methods as described in the above embodiments.

[0156] The present invention also provides a computer storage medium storing computer execution instructions, which, when executed by a processor, are used to implement various possible electromagnetic suppression maximum distance prediction methods as described in the above embodiments.

[0157] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between 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 collaboratively by several physical components. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled 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 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 technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0158] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0159] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An electromagnetic suppression maximum distance prediction method, characterized by, The method comprises: Step S201: acquiring electromagnetic control equipment spectrum characteristic parameters and suppressed target radio station spectrum characteristic parameters, wherein the electromagnetic control equipment spectrum characteristic parameters include: transmit power spectral density , electromagnetic control equipment working center frequency , transmit antenna gain pattern , transmit antenna effective height The suppressed target radio station spectrum characteristic parameters include: target radio station working center frequency , target radio station working bandwidth , receive antenna gain pattern , receiver noise figure , receive antenna effective height , receive spectrum template , harmful interference coefficient ; Step S202: calculating the minimum harmful interference power received by the target radio station according to the target radio station operating bandwidth , the receiver noise coefficient , the harmful interference coefficient , the receiving antenna gain pattern , the target radio station receiving antenna gain pattern ; Step S203: calculating the frequency suppression factor based on the transmit power spectral density , the receive spectral template , the electromagnetic management equipment operating center frequency , the target radio operating center frequency , the frequency suppression factor ; Step S204: calculating the interference equivalent isotropically radiated power (EIRP) based on the transmit antenna gain pattern , the transmit power spectral density ;​ Step S205: According to the receiving antenna gain , the target radio station operating bandwidth , the electromagnetic management equipment operating center frequency , the receiver noise coefficient , the harmful interference coefficient , the frequency suppression factor , the minimum harmful interference power , the interference equivalent isotropically radiated power , the electromagnetic suppression path distance is calculated by the following formula : According to the effective height of the transmitting antenna and the effective height of the receiving antenna , the slant range distance is calculated using the following formula : ； Step S206: Calculate the electromagnetic suppression maximum distance according to the smooth earth spherical sight distance and the electromagnetic suppression path distance , using the following formula : wherein, represents the minimum of two values, and the minimum of two values, is the equivalent earth radius factor, .

2. The electromagnetic suppression maximum distance prediction method of claim 1, wherein, The step S202 comprises: According to the target station operating bandwidth , the receiver noise figure , the harmful interference figure , the receiving antenna gain pattern , the minimum harmful interference power received by the target station is calculated using the following formula : wherein, represents a logarithm function to the base 10, is the Boltzmann constant, is the normalised temperature in Kelvin, is the target station receive antenna gain in the direction of the interfering path, which is obtained by looking up the receive antenna gain pattern in corresponding value, is the interfering azimuth angle, i.e. the angle between true north and the interfering path clockwise.

3. The electromagnetic suppression maximum distance prediction method of claim 1, wherein, The step S203 comprises: in accordance with the transmit power spectral density , the receive spectral template , the electromagnetic management equipment operating center frequency , the target radio operating center frequency , a frequency suppression factor is calculated using the following equation : wherein, the operating center frequency of the electromagnetic control equipment the difference between the operating center frequency of the electromagnetic control equipment and the operating center frequency of the target radio, i.e. .

4. The electromagnetic suppression maximum distance prediction method of claim 1, wherein, The step S204 comprises: According to the transmit antenna gain pattern , the transmit power spectral density , the interference equivalent isotropically radiated power is calculated using the formula : wherein, is the electromagnetic control equipment transmit power, , is the electromagnetic control equipment jamming path direction transmit antenna gain, which is obtained by looking up the transmit antenna gain pattern in corresponding value, is the jamming azimuth angle, i.e. the angle between true north and the jamming path clockwise, and .

5. An electromagnetic maximum distance- preserving device, characterized by The device is applied to the electromagnetic suppression maximum distance prediction method of any one of claims 1 to 4, comprising: The acquisition module is configured to perform step S201 of acquiring electromagnetic management and control equipment spectrum characteristic parameters and suppressed target radio station spectrum characteristic parameters, wherein the electromagnetic management and control equipment spectrum characteristic parameters comprise: transmit power spectral density , electromagnetic management and control equipment operating center frequency , transmit antenna gain pattern , transmit antenna effective height The suppressed target radio station spectrum characteristic parameters comprise: target radio station operating center frequency , target radio station operating bandwidth , receive antenna gain pattern , receiver noise figure , receive antenna effective height , receive spectrum template , harmful interference figure ; a computing module for performing step S202: calculating a minimum harmful interference power of the target radio station according to the target radio station operating bandwidth , the receiver noise figure , the harmful interference figure , the receiving antenna gain pattern , the target radio station operating bandwidth ; The computing module is further configured to perform step S203: calculating the frequency suppression factor according to the transmit power spectral density , the receive spectrum template , the electromagnetic management equipment center frequency , the target radio station center frequency , and the target radio station center frequency ; The calculation module is also used to execute step S204: based on the transmit antenna gain pattern The transmitted power spectral density Calculate the equivalent radiated power of the interference. ; The calculation module is further configured to perform step S205: based on the receiving antenna gain The target radio station's operating bandwidth The electromagnetic control equipment operates at a central frequency. The receiver noise figure The harmful interference coefficient The frequency suppression factor The minimum harmful interference power The interference equivalent radiated power The effective height of the receiving antenna The effective height of the transmitting antenna Perform calculations, predict and output the maximum electromagnetic suppression distance. ; an output module configured to perform step S205: outputting the electromagnetic suppression maximum distance .

6. An electromagnetic maximum distance- preserving prediction device, characterized by Comprising: A memory; A processor; Wherein the memory stores computer execution instructions; The processor executes the computer execution instructions stored in the memory to realize the electromagnetic suppression maximum distance prediction method of any one of claims 1 to 4.

7. A computer storage medium, characterized in that The computer storage medium stores computer execution instructions, and the computer execution instructions are executed by the processor to realize the electromagnetic suppression maximum distance prediction method of any one of claims 1 to 4.

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