CN113064125B - Complex electromagnetic environment construction method based on radio frequency port response equivalence - Google Patents
Complex electromagnetic environment construction method based on radio frequency port response equivalence Download PDFInfo
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Abstract
The invention discloses a complex electromagnetic environment construction method based on radio frequency port response equivalence, which comprises the following steps: s1, establishing a complex electromagnetic environment index parameter set and a radio frequency port index parameter set; s2, determining spatial position representation between the complex electromagnetic environment and the radio frequency port; s3, setting a radio frequency port initial parameter and a complex electromagnetic environment initial parameter; s4, establishing a relative position dynamic representation model between the radio frequency port and the complex electromagnetic environment; s5, establishing a polarization matching factor dynamic model between the radio frequency port and the complex electromagnetic environment; s6, establishing a port dynamic response model between the radio frequency port and the complex electromagnetic environment; and S7, establishing a dynamic equivalent model of the internal field of the complex electromagnetic environment based on the port response, and realizing the construction of the complex electromagnetic environment. The invention expands the static construction of a single electromagnetic environment to the equivalent dynamic construction of a complex electromagnetic environment, and can effectively solve the problems of difficult construction, poor repeatability, high cost and the like of the existing complex electromagnetic environment with high field intensity, large airspace and multiple categories.
Description
Technical Field
The invention relates to construction of a complex electromagnetic environment, in particular to a complex electromagnetic environment construction method based on radio frequency port response equivalence.
Background
The electromagnetic environment adaptability refers to the capability of electronic equipment to realize preset functions, performance and/or abnormal work under the action of an expected electromagnetic environment, and the electromagnetic environment faced by the current electronic equipment has the characteristics of time domain jumping, large spatial scale, extremely strong energy (up to tens of thousands of V/m in some scenes), wide frequency spectrum coverage range, various signal types and the like. The method brings great challenges to the electromagnetic environment adaptability of the electronic equipment, and in order to determine how the electromagnetic environment adaptability of the electronic equipment is, relevant tests need to be carried out, and external field tests have the defects of poor repeatability, high organization implementation cost and the like, so that the electromagnetic environment adaptability tests are mostly carried out in internal fields at present. The correct steps are as follows: firstly, an electromagnetic environment index parameter set is required to be established, then the dynamic interaction relation between the electromagnetic environment and the electronic equipment is analyzed, the internal field electromagnetic environment is constructed, and finally the electromagnetic environment adaptability dynamic evaluation is carried out by combining the functions of the electronic equipment. However, the electromagnetic environment actually faced by electronic equipment has multiple dimensions, high field strength, wide spatial distribution range, dynamic change, and a great number of signal types and signal sources, so a common consensus on a method for constructing the internal field dynamic completeness of the electromagnetic environment is not yet established at home and abroad.
At present, the electromagnetic environment adaptability of electronic equipment is generally evaluated in an internal field by adopting the standard of the national military standard (GJB151 series), tests are carried out according to the electromagnetic signal type and waveform specified by each test item, the electromagnetic environment adaptability of the electronic equipment is judged by comparing the test result with a standard limit value, the electronic equipment generally passes the detection test, but when the electronic equipment faces the actual complex electromagnetic environment, the performance degradation and even damage are often caused, at the moment, the targeted design is carried out, on one hand, the design and use cost is increased, and on the other hand, the situation that the performance degradation or damage cannot be caused in different use scenes of the electronic equipment cannot be ensured. Therefore, the currently developed internal field "static or quasi-static incomplete" electromagnetic environment construction method is not enough to support the electromagnetic environment adaptability evaluation of electronic equipment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a complex electromagnetic environment construction method based on radio frequency port response equivalence.
The purpose of the invention is realized by the following technical scheme: a complex electromagnetic environment construction method based on radio frequency port response equivalence comprises the following steps:
s1, establishing a complex electromagnetic environment index parameter set and a radio frequency port index parameter set;
s2, according to the radio frequency port index parameter set, determining spatial position representation between the complex electromagnetic environment and the radio frequency port;
s3, setting a radio frequency port initial parameter and a complex electromagnetic environment initial parameter according to the radio frequency port index parameter set and the spatial position representation between the complex electromagnetic environment and the radio frequency port;
s4, establishing a relative position dynamic representation model between the radio frequency port and the complex electromagnetic environment based on the radio frequency port initial parameter and the complex electromagnetic environment initial parameter;
s5, establishing a polarization matching factor dynamic model between the radio frequency port and the complex electromagnetic environment according to a relative position dynamic representation model between the radio frequency port and the complex electromagnetic environment;
s6, establishing a port dynamic response model between the radio frequency port and the complex electromagnetic environment according to a relative position dynamic representation model between the radio frequency port and the complex electromagnetic environment and a polarization matching factor dynamic model between the radio frequency port and the complex electromagnetic environment;
and S7, according to a port dynamic response model between the radio frequency port and the complex electromagnetic environment, establishing a dynamic equivalent model of the internal field of the complex electromagnetic environment based on port response, and realizing the construction of the complex electromagnetic environment.
The invention has the beneficial effects that:
(1) the invention realizes the equivalent construction of the small-field-intensity low-power electromagnetic environment of the internal field by equivalent of the radio frequency port according to the mapping relation between the radio frequency port and the complex electromagnetic environment, reduces the test cost and can realize the integrity construction of the internal field of the complex electromagnetic environment.
(2) The method for constructing the internal field electromagnetic environment is static or quasi-static in nature, can only reflect the electromagnetic environment faced by the electronic equipment at a certain moment or in a certain state, and cannot reflect the dynamic change of the electromagnetic environment.
(3) In the existing GJB test carried out in an internal field, according to a specified waveform, the sensitive phenomenon of the electronic equipment is not sufficiently excited under some conditions, so that the test result cannot reflect the actual working state of the electronic equipment, and the reliability of the test result is low; the invention is combined with the function of the electronic equipment, dynamically simulates the working condition of the electronic equipment under the hypothetical electromagnetic environment, is easier to excite the sensitive phenomenon of the electronic equipment, can improve the accuracy and persuasion of the test result, and realizes the bottom detection of the electromagnetic environment adaptability of the electronic equipment.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a complex electromagnetic environment index parameter set;
FIG. 3 is a set of radio frequency port index parameters;
FIG. 4 is a representation of the spatial location between the complex electromagnetic environment and the RF port of the present invention;
FIG. 5 is a diagram illustrating the dynamic relationship between the relative positions of the radiation source A and the RF port of the radar receiver in an embodiment of the present invention;
FIG. 6 is a diagram illustrating the dynamic relationship between the relative positions of the radiation source B and the RF port of the radar receiver in an embodiment of the present invention;
FIG. 7 is a diagram illustrating a dynamic relationship of polarization matching factors between a radiation source A and a radio frequency port of a radar receiver in an embodiment of the present invention;
FIG. 8 is a diagram illustrating a dynamic relationship of polarization matching factors between a radiation source B and a radio frequency port of a radar receiver in an embodiment of the present invention;
FIG. 9 is a graph showing the dynamic response between the different position profiles of the radiation source A and the RF port of the radar receiver during operation according to the embodiment of the present invention;
FIG. 10 is a graph showing the dynamic response between the different position profiles of the radiation source B and the RF port of the radar receiver during operation according to an embodiment of the present invention;
FIG. 11 is a layout diagram of an equivalent construction of an internal field electromagnetic environment in an embodiment of the present invention;
FIG. 12 is a graph illustrating the dynamic variation of the external output power of the environment-building radiation source A in accordance with an embodiment of the present invention;
fig. 13 is a graph illustrating the dynamic change of the external output power of the environment-building radiation source B in the embodiment of the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
The invention has strong correlation between the response of the radio frequency port of the electronic equipment and the complex electromagnetic environment, can effectively realize the dimension reduction equivalent construction of the internal field electromagnetic environment through the response equivalence of the radio frequency port to the complex electromagnetic environment, has low consumption and high efficiency in the construction process, has accurate result, firstly establishes an index parameter set of the complex electromagnetic environment and an index parameter set of the radio frequency port aiming at the composition characteristics of the complex electromagnetic environment, and determines the dynamic relation between each index of the radio frequency port and the complex electromagnetic environment; then establishing a dynamic response relation between the radio frequency port and the complex electromagnetic environment; and finally, performing equivalent construction of a complex electromagnetic environment based on radio frequency port response equivalence in the internal field, specifically:
as shown in fig. 1, a method for constructing a complex electromagnetic environment based on radio frequency port response equivalence includes the following steps:
s1, establishing a complex electromagnetic environment index parameter set and a radio frequency port index parameter set
The complex electromagnetic environment is formed by a plurality of moving radiation sources radiating electromagnetic signals outwards, and the complex electromagnetic environment index parameter set comprises information of each radiation source and radiation signal information of each radiation source;
the information of the radiation source comprises position information and speed information of the radiation source;
the radiation signal information of the radiation source comprises time domain information, frequency domain information, energy domain information and path loss information in a signal propagation process of the radiation signal of the radiation source.
The complex electromagnetic environment index parameter set is shown in fig. 2. The complex electromagnetic environment index parameter set can be tailored according to actual conditions.
In step S1, the rf port index parameter set includes rf port information and received signal information of the rf port;
the radio frequency port information comprises azimuth angle information of the radio frequency port relative to the ground, pitch angle information of the radio frequency port relative to the ground, position information of the radio frequency port and speed information of the radio frequency port;
the received signal information of the radio frequency port comprises directional diagram information, time domain information and path loss information in a signal propagation process of the received signal of the radio frequency port. The set of radio frequency port index parameters is shown in fig. 3. The radio frequency port index parameter set can be tailored according to actual conditions.
S2, representing spatial position between complex electromagnetic environment and radio frequency port
And establishing a spatial distribution relation between the complex electromagnetic environment and the radio frequency ports, as shown in fig. 4. The tested object is located at the origin O (0, 0, 0) of the coordinate system, the ground is an xoy surface, and the normal direction of the ground is defined as a z-axis. The complex electromagnetic environment is composed of n radiation sources in space, and the radiation sources are arranged at t0The time being O relative to the position of the coordinate system0n(x0n，y0n，z0n) Since the position of the radiation source relative to the coordinate system is dynamically changed, mainly including the dynamic changes of the rotation angle and the distance, in order to describe the dynamic information of the radiation source, at O0n(x0n，y0n，z0n) And establishing a new coordinate system x ' y ' z ', wherein the coordinate axis is consistent with the direction of the original coordinate system.
S3, setting a radio frequency port initial parameter and a complex electromagnetic environment initial parameter
The starting parameters of the radio frequency port are U (x, y, z, v, t, G)rθ, Φ, L), where x, y, z represents position information of the rf port, v represents velocity information of the rf port, t represents time information of the rf port, θ represents azimuth information of the rf port, Φ represents pitch information of the rf port, L represents path transmission loss of a complex electromagnetic environment signal propagating to the rf port, and GrPattern information representing the radio frequency ports. Considering from the spatial distribution of signals in a complex electromagnetic environment, signals in the electromagnetic environment are received by a main lobe of a radio frequency port, and possibly received by a side lobe of the radio frequency port; considering the frequency band distribution of signals in a complex electromagnetic environment, signals received by the radio frequency port have both in-band signals and out-of-band signals, which can pass through directional diagram information G of the radio frequency portrAnd (6) performing characterization.
The complex electromagnetic environment is mainly composed of a radiation source moving in space, and the initial parameter is Sn(xn,yn,zn,vn,tn,fn,Gn,Pn,Ln) Characterisation of the formula (I), in which xn,yn,znRepresenting position information of the n-th radiation source, vnRepresenting speed information of the n-th radiation source, tnTime domain information representing the nth radiation source, fnRepresenting frequency domain information of the nth radiation source, GnRepresenting the emission gain, P, of the n-th radiation sourcenRepresenting energy domain information of the n-th radiation source, LnRepresenting the path transmission loss of the nth radiation source electromagnetic signal propagating to the radio frequency port.
S4, establishing a relative position dynamic representation model between the radio frequency port and the complex electromagnetic environment
S401, considering the change of the attitude angle in the radiation source movement process, carrying out dynamic modeling on the rotation angle of the radiation source. The rotation angles of the radiation source around the x-axis, the y-axis and the z-axis are defined as alpha, beta and gamma, respectively, and the right rotation direction around the coordinate axis is positive. Thus, the angle transformation matrix of the radiation source with respect to the radio frequency ports can be expressed as formula (1):
s402, dynamically modeling the distance between the radiation source and the radio frequency port. The speed of the radiation source is v (t), and the attitude angle is (alpha)0,β0,γ0). At t0At the moment, the velocity direction is along the y 'axis, so in the x' y 'z' coordinate system, the velocity vector can be expressed as formula (2):
when the variation of the attitude angle of the radiation source is (α, β, γ), the velocity vector can be expressed as formula (3) and formula (4):
radiation source at t + t0The position (x, y, z) of the time of day can be expressed as formula (5):
the dynamic relationship between the radiation source and the radio frequency port distance R, the azimuth angle theta and the pitch angle phi can be expressed as formula (6):
s5, establishing a polarization matching factor dynamic model between the radio frequency port and the complex electromagnetic environment
Polarization direction matrix for RF ports using ARAnd (4) showing. Polarization direction matrix for radiation source in electromagnetic environmentUIndicating that the source antenna starting direction is along the z 'axis in the x' y 'z' coordinate system. At time t0The attitude angle of the radiation source is (alpha)0,β0,γ0) The polarization direction of the radiation source can be expressed as formula (7):
when the attitude angle of the radiation source changes (α, β, γ), the polarization direction matrix of the radiation source can be expressed as formula (8) and formula (9):
when the radio frequency port receives a complex electromagnetic environment signal, there may be a loss of received power due to polarization mismatch, and a polarization matching factor p (p is greater than or equal to 0 and less than or equal to 1) between the radio frequency port and the complex electromagnetic environment can be expressed as formula (10):
s6, establishing a dynamic response model between the radio frequency port and the complex electromagnetic environment port
The port response of the radio frequency port to the complex electromagnetic environment can be characterized by the power of the radio frequency port coupling electromagnetic signal, and the radio frequency port coupling signal power has strong correlation with the complex electromagnetic environment. The radio frequency port and complex electromagnetic environment port dynamic response model can be expressed as formula (11):
wherein, PrReceiving complex electromagnetic environment signal power value, P, for radio frequency portiIs the radiation power of the ith radiation source, GuiIs the emission gain of the i-th radiation source, GriGain, λ, for the radio frequency port receiving the ith radiation sourceiFor the wavelength corresponding to the ith radiation source, in relation to the frequency of the radiation source, piIs the polarization matching factor, R, of the ith radiation source and the RF portiDistance between the ith radiation source and the radio frequency port, LiThe transmission loss of the path for the electromagnetic environment signal of the ith radiation source to propagate to the radio frequency port.
S7, establishing a dynamic equivalent model based on port response of an internal field of a complex electromagnetic environment
Coupling response P at radio frequency port according to complex electromagnetic environmentrIn the test area, the coupling response of the constructed electromagnetic environment acting on the radio frequency port is ensured to be PrDynamic equivalence of a complex electromagnetic environment based on port response in an internal field is realized, and the conditions required to be met by experimental construction can be expressed as formula (12):
wherein, PradExternal output power of radiation source for environment construction, Grad(theta, phi) construction of radiation source emission gain, R, for the environmentsConstructing a radiation source to radio frequency port distance, L, for the environmentsIs the path transmission loss for the electromagnetic signal propagating to the radio frequency port.
In the process of constructing the electromagnetic environment, to ensure that the environment construction radiation source is aligned with the main lobe of the radio frequency port and polarization matching is carried out, and the environment construction radiation source is in a far field region, according to the environment construction requirement, the external output power P of the environment construction radiation source is mainly dynamically adjustedradAnd a distance R from the RF portsRealizing dynamic equivalent construction of internal field of complex electromagnetic environment, environment construction radiation sourceExternal output power PradThe condition to be satisfied can be expressed as formula (13):
in the embodiment of the application, taking the dynamic equivalent construction of the internal field of the complex electromagnetic environment faced by the actual working of the radio frequency port of the radar receiver as an example, the specific process is as follows:
the first step is as follows: establishing a complex electromagnetic environment index parameter set and a radio frequency port index parameter set
The complex electromagnetic environment index parameter set comprises: position information, speed information, time domain information, frequency domain information, energy domain information, information of each radiation source in a complex electromagnetic environment, and path loss information in an electromagnetic signal propagation process.
The radio frequency port index parameter set comprises: position information, azimuth angle information, pitch angle information, directional diagram information, speed information, time domain information, and path loss information in the process of electromagnetic signal propagation.
The second step is that: spatial location characterization between complex electromagnetic environment and radio frequency port
According to fig. 4, a spatial distribution relationship between a complex electromagnetic environment and a radar receiver radio frequency port is established, assuming that the radar receiver radio frequency port is located at O (0, 0, 0) in an xyz coordinate system, the complex electromagnetic environment is composed of two radiation sources, and a function signal and an interference signal are respectively radiated to the outside.
The third step: setting an initial parameter of a radio frequency port and an initial parameter of a complex electromagnetic environment
Two sources of radiation in space, a (1km, -2km, 0km) and B (15km, 0km, 3km), are located under the xyz coordinate system. The position A is a functional signal radiation source, the initial attitude angle of the radiation source is (5 degrees, -10 degrees, 0 degrees), the running speed of the position A is 100km/h, the emission gain is 1dB, the emission power is 40dBm, the attitude angle changes along with time, the relationship between the position A and the position A is that alpha (t) is-0.001 t (°), beta (t) is-0.002 t (°), gamma (t) is 0.001 t (°), the functional signal at the position A is received by a main lobe of a radio frequency port of a radar receiver, the working frequency point is 3GHz, and the gain of the main lobe is 20 dB; the position B is an interference signal radiation source, the initial attitude angle of the radiation source is (-5 degrees, 0 degrees and 5 degrees), the running speed of the position B is 80km/h, the transmission gain is 3.8dB, the transmission power is 53dBm, the attitude angle changes along with time, the two relations are that alpha (t) is-0.002.t (°), beta (t) is-0.003.t (°), gamma (t) is-0.001.t (°), interference signals of the position B are received by a radio frequency port secondary lobe of a radar receiver, the working frequency point is 3.2GHz, and the secondary lobe gain is 3 dB.
The fourth step: establishing a relative position dynamic representation model between a radio frequency port and a complex electromagnetic environment
According to the established dynamic representation model of the relative positions of the radio frequency port and the complex electromagnetic environment, assuming that the running time of a radiation source in the complex electromagnetic environment is 300s, the relative position relationship between the radio frequency port of the radar receiver and the radiation source A and the radiation source B is shown in FIGS. 5 and 6. Fig. 5(a) - (d) are dynamic relations of X-direction distance, Y-direction distance, Z-direction distance and total distance of the radiation source a during operation relative to the radio frequency port of the radar receiver, respectively. Fig. 6(a) - (d) are dynamic relations of X-direction distance, Y-direction distance, Z-direction distance and total distance of the radiation source B relative to the rf port of the radar receiver during operation.
The fifth step: establishing a polarization matching factor dynamic model between a radio frequency port and a complex electromagnetic environment
According to the established polarization matching factor dynamic model of the radio frequency port and the complex electromagnetic environment, the dynamic relation of the polarization matching factor between the radiation source A and the radio frequency port of the radar receiver during the operation is shown in fig. 7, and the dynamic relation of the polarization matching factor between the radiation source B and the radio frequency port of the radar receiver during the operation is shown in fig. 8.
And a sixth step: establishing a dynamic response model between a radio frequency port and a complex electromagnetic environment port
According to the established dynamic response model of the radio frequency port and the complex electromagnetic environment port, the dynamic response relation between the radiation source A and the radar receiver radio frequency port during operation is shown in fig. 9, and the dynamic response relation between the radiation source B and the radar receiver radio frequency port during operation is shown in fig. 10. Fig. 9(a) - (b) are dynamic response relationships between different position profiles and the rf port of the radar receiver during operation of the radiation source a, respectively. Fig. 10(a) - (B) are dynamic response relationships between different position profiles and the rf port of the radar receiver during operation of the radiation source B, respectively.
The seventh step: establishing dynamic equivalent model of complex electromagnetic environment internal field based on port response
And performing internal field equivalent construction on the complex electromagnetic environment faced by the radio frequency port of the radar receiver according to the established dynamic equivalent model of the internal field of the complex electromagnetic environment based on the port response, wherein the electromagnetic environment equivalent construction layout is shown in fig. 11. The rear end of the environment construction radiation source A is connected with the functional signal generating device and the monitoring point A through a cable, the external output power of the functional signal generating device is dynamically adjusted through the monitoring point A, the external output power is dynamically changed as shown in figure 12, the functional signal is radiated to a main lobe of a radio frequency port of a radar receiver, and the dynamic equivalent construction of the radiation source A in the complex electromagnetic environment is realized. The rear end of the environment construction radiation source B is connected with an interference signal generating device and a monitoring point B through a cable, the external output power of the interference signal generating device is dynamically adjusted through the monitoring point B, the external output power is dynamically changed as shown in figure 13, interference signals are radiated to a radio frequency port side lobe of a radar receiver, and the dynamic equivalent construction of the radiation source B in a complex electromagnetic environment is achieved.
As described above, the advantage of performing the equivalent construction of the complex electromagnetic environment by using the radio frequency port response equivalence principle in the present invention is that, compared with the conventional complex electromagnetic environment construction method, the method can establish the dynamic relationship between the radio frequency port and the complex electromagnetic environment in the aspects of space domain, energy domain, time domain, frequency domain, etc., so that the dynamic construction of the complex electromagnetic environment can be realized. In addition, the invention combines the mapping relation between the radio frequency port and the complex electromagnetic environment, realizes equivalent construction of the small-field low-power electromagnetic environment through equivalent radio frequency ports of a plurality of physical unrealizable scenes such as high-field high-power signals and the like in the complex electromagnetic environment, reduces the test cost and further realizes the completeness construction of the complex electromagnetic environment.
What has been described above is only an embodiment embodying the present invention based on a port response equivalent complex electromagnetic environment construction method. The present invention is not limited to the above-described embodiments. The description of the invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (10)
1. A complex electromagnetic environment construction method based on radio frequency port response equivalence is characterized in that: the method comprises the following steps:
s1, establishing a complex electromagnetic environment index parameter set and a radio frequency port index parameter set;
s2, according to the radio frequency port index parameter set, determining spatial position representation between the complex electromagnetic environment and the radio frequency port;
s3, setting a radio frequency port initial parameter and a complex electromagnetic environment initial parameter according to the radio frequency port index parameter set and the spatial position representation between the complex electromagnetic environment and the radio frequency port;
s4, establishing a relative position dynamic representation model between the radio frequency port and the complex electromagnetic environment based on the radio frequency port initial parameter and the complex electromagnetic environment initial parameter;
s5, establishing a polarization matching factor dynamic model between the radio frequency port and the complex electromagnetic environment according to a relative position dynamic representation model between the radio frequency port and the complex electromagnetic environment;
s6, establishing a port dynamic response model between the radio frequency port and the complex electromagnetic environment according to a relative position dynamic representation model between the radio frequency port and the complex electromagnetic environment and a polarization matching factor dynamic model between the radio frequency port and the complex electromagnetic environment;
and S7, according to a port dynamic response model between the radio frequency port and the complex electromagnetic environment, establishing a dynamic equivalent model of the internal field of the complex electromagnetic environment based on port response, and realizing the construction of the complex electromagnetic environment.
2. The method for constructing a complex electromagnetic environment based on radio frequency port response equivalence of claim 1, wherein the method comprises the following steps: the complex electromagnetic environment is formed by a plurality of moving radiation sources radiating electromagnetic signals outwards, and the complex electromagnetic environment index parameter set in the step S1 comprises information of each radiation source and radiation signal information of each radiation source;
the information of the radiation source comprises position information and speed information of the radiation source;
the radiation signal information of the radiation source comprises time domain information, frequency domain information, energy domain information and path loss information in a signal propagation process of the radiation signal of the radiation source.
3. The method for constructing a complex electromagnetic environment based on radio frequency port response equivalence of claim 1, wherein the method comprises the following steps: in step S1, the rf port index parameter set includes rf port information and received signal information of the rf port;
the radio frequency port information comprises azimuth angle information of the radio frequency port relative to the ground, pitch angle information of the radio frequency port relative to the ground, position information of the radio frequency port and speed information of the radio frequency port;
the received signal information of the radio frequency port comprises directional diagram information, time domain information and path loss information in a signal propagation process of the received signal of the radio frequency port.
4. The method for constructing a complex electromagnetic environment based on radio frequency port response equivalence of claim 1, wherein the method comprises the following steps: the spatial position between the complex electromagnetic environment and the radio frequency port in the step S2 is characterized as:
establishing a spatial distribution relation between a complex electromagnetic environment and a radio frequency port, and setting a sample at an origin O (0, 0, 0) of a coordinate system, wherein the ground is an xoy surface, and the normal direction of the ground is defined as a z axis; the complex electromagnetic environment consists of n radiation sources in space, said radiation sources being at t0The time being O relative to the position of the coordinate system0n(x0n，y0n，z0n) Since the position of the radiation source relative to the coordinate system is dynamically variable, including the dynamic variation of the rotation angle and the distance, the purpose is to provide a device for detecting the position of the radiation source relative to the coordinate systemDynamic information describing the radiation source, in O0n(x0n，y0n，z0n) And establishing a new coordinate system x ' y ' z ', wherein the coordinate axis is consistent with the direction of the original coordinate system.
5. The method for constructing a complex electromagnetic environment based on radio frequency port response equivalence of claim 1, wherein the method comprises the following steps: the radio frequency port start parameters set in step S3 are as follows:
using U (x, y, z, v, t, G) as the initial parameter of the radio frequency portrθ, Φ, L), where x, y, z represents position information of the rf port, v represents velocity information of the rf port, t represents time information of the rf port, θ represents azimuth information of the rf port, Φ represents pitch information of the rf port, L represents path transmission loss of a complex electromagnetic environment signal propagating to the rf port, and GrPattern information representing the radio frequency ports; considering from the spatial distribution of signals in a complex electromagnetic environment, signals in the electromagnetic environment are received by a main lobe of a radio frequency port and also received by a side lobe of the radio frequency port; considering the frequency band distribution of the signals in the complex electromagnetic environment, the signals received by the radio frequency port have both in-band signals and out-of-band signals, which pass through the directional diagram information G of the radio frequency portrAnd (6) performing characterization.
6. The method for constructing a complex electromagnetic environment based on radio frequency port response equivalence of claim 1, wherein the method comprises the following steps: the starting parameters of the complex electromagnetic environment set in the step S3 are as follows:
using S as initial parameter of complex electromagnetic environmentn(xn,yn,zn,vn,tn,fn,Gn,Pn,Ln) Characterisation of the formula (I), in which xn,yn,znRepresenting position information of the n-th radiation source, vnRepresenting speed information of the n-th radiation source, tnTime domain information representing the nth radiation source, fnRepresenting frequency domain information of the nth radiation source, GnRepresenting the emission gain, P, of the n-th radiation sourcenRepresents the n-thEnergy domain information of the radiation source, LnRepresenting the path transmission loss of the nth radiation source electromagnetic signal propagating to the radio frequency port.
7. The method for constructing a complex electromagnetic environment based on radio frequency port response equivalence of claim 4, wherein the method comprises the following steps: the step S4 includes:
s401, considering the change of the attitude angle in the motion process of the radiation source, establishing a dynamic model of the rotation angle of the radiation source, and specifying that the rotation angles of the radiation source around an x axis, a y axis and a z axis are respectively alpha, beta and gamma, and the right rotation direction around a coordinate axis is positive, so that the angle conversion matrix of the radiation source relative to the radio frequency port is expressed as a formula (1):
s402, establishing a distance dynamic model between the radiation source and the radio frequency port, wherein the speed of the radiation source is v (t), and the posture angle of the radiation source is (alpha)0,β0,γ0) At t0At time, the velocity direction is along the y 'axis, so in the x' y 'z' coordinate system, the velocity vector is expressed as equation (2):
when the change of the radiation source attitude angle is (alpha, beta, gamma), the velocity vector is expressed as formula (3) and formula (4):
said radiationThe source being at t + t0The position (x, y, z) of the time is expressed by equation (5):
the dynamic relation of the distance R, the azimuth angle theta and the pitch angle phi of the radiation source and the radio frequency port is expressed as a formula (6):
8. the method for constructing a complex electromagnetic environment based on radio frequency port response equivalence of claim 7, wherein the method comprises the following steps: the step S5 includes:
using A as polarization direction matrix of radio frequency portRShowing that the polarization direction matrix of the radiation source is denoted by AUIndicating that the starting direction of the radiation source antenna is along the z 'axis under the x' y 'z' coordinate system; at time t0The attitude angle of the radiation source is (alpha)0,β0,γ0) The polarization direction of the radiation source is expressed as formula (7):
when the attitude angle of the radiation source changes (alpha, beta, gamma), the polarization direction matrix of the radiation source is expressed as formula (8) and formula (9):
when the radio frequency port receives a complex electromagnetic environment signal, when the receiving power loss caused by polarization mismatch exists, a polarization matching factor p between the radio frequency port and the complex electromagnetic environment is represented as a formula (10), wherein p is more than or equal to 0 and less than or equal to 1:
9. the method for constructing a complex electromagnetic environment based on radio frequency port response equivalence of claim 4, wherein the method comprises the following steps: in the step S6, a port response between the rf port and the complex electromagnetic environment is represented by a power of an rf port coupling electromagnetic signal, where the rf port coupling signal power has a strong correlation with the complex electromagnetic environment, and a dynamic response model between the rf port and the complex electromagnetic environment port is expressed as formula (11):
wherein, PrReceiving complex electromagnetic environment signal power value, P, for radio frequency portiIs the radiation power of the ith radiation source, GuiIs the emission gain of the i-th radiation source, GriGain, λ, for the radio frequency port receiving the ith radiation sourceiFor the wavelength corresponding to the ith radiation source, in relation to the frequency of the radiation source, piIs the polarization matching factor, R, of the ith radiation source and the RF portiDistance between the ith radiation source and the radio frequency port, LiThe transmission loss of the path for the electromagnetic environment signal of the ith radiation source to propagate to the radio frequency port.
10. The method for constructing a complex electromagnetic environment based on radio frequency port response equivalence of claim 9, wherein: the step S7 includes:
coupling response P at radio frequency port according to complex electromagnetic environmentrWithin the test area, constructed electricityThe coupling response of the magnetic environment acting on the radio frequency port is PrAnd realizing dynamic equivalence of the complex electromagnetic environment based on port response in an internal field, wherein the conditions required to be met by test construction are expressed as formula (12):
wherein, PradExternal output power of radiation source for environment construction, Grad(theta, phi) construction of radiation source emission gain, R, for the environmentsConstructing a radiation source to radio frequency port distance, L, for the environmentsTransmission loss for a path for an electromagnetic signal propagating to a radio frequency port;
in the process of constructing the electromagnetic environment, to ensure that the environment construction radiation source is aligned with the main lobe of the radio frequency port and polarization matching is carried out, and the environment construction radiation source is in a far field region, the external output power P of the environment construction radiation source is dynamically adjusted according to the environment construction requirementradAnd a distance R from the RF portsConstructing a dynamic equivalent electromagnetic environment of the complex electromagnetic environment in an internal field, and constructing the external output power P of the radiation source by the environmentradThe condition to be satisfied is expressed as formula (13):
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