Radio astronomical electromagnetic environment simulation and construction method and system and computer equipment

Abstract

The invention relates to a radio astronomical electromagnetic environment simulation and construction method and system and computer equipment, and is applied to a radio astronomical electromagnetic environment simulation system, and the method comprises the steps: obtaining electromagnetic environment simulation parameters and a target environment simulation mode; determining a target simulation mode corresponding to the target environment simulation mode according to a preset corresponding relation; based on the electromagnetic environment simulation parameters, performing simulation according to a target simulation mode, and determining a target radio astronomical signal corresponding to the target environment simulation mode; obtaining a target radio frequency interference signal determined according to the electromagnetic environment simulation parameter; performing superposition processing on the target radio astronomical signal and the target radio frequency interference signal to obtain a target environment simulation signal; constructing a radio astronomical electromagnetic environment according to the target environment simulation signal; high restoration of the complex radio astronomical electromagnetic environment is achieved, and the flexibility and adaptability of simulation and construction of the radio astronomical electromagnetic environment are improved.

Description

Technical Field

[0001] The present application relates to the field of signal simulation technology, and in particular to a method, system and computer equipment for simulating and constructing a radio astronomy electromagnetic environment. Background Art

[0002] In recent years, many large-scale radio telescope systems have been established internationally. These radio telescopes consist of receiving arrays composed of multiple antennas, multi-channel receiving and acquisition systems, and back-end signal processing systems. Radio telescope systems usually need to undergo rigorous testing and long-term debugging in complex and diverse electromagnetic environments to optimize their functions, but there are limitations in debugging and testing in the actual environment, such as a single test environment, many uncontrollable factors, and a long debugging cycle. In order to overcome the above problems, the existing technology usually relies on a combination of various special signal generators to simulate the electromagnetic environment.

[0003] However, there are problems in the related art that a specified type of radio astronomy signal cannot be simulated and a corresponding electromagnetic environment cannot be flexibly constructed. Summary of the invention

[0004] Based on this, it is necessary to provide a radio astronomy electromagnetic environment simulation and construction method, system and computer equipment to address the above technical problems.

[0005] In a first aspect, the present application provides a radio astronomy electromagnetic environment simulation and construction method, which is applied to a radio astronomy electromagnetic environment simulation system, and the method includes: Acquire electromagnetic environment simulation parameters and a target environment simulation mode; the target environment simulation mode includes at least any one of a plurality of environment simulation modes; Determine a target simulation mode corresponding to the target environment simulation mode according to a preset corresponding relationship; the preset corresponding relationship includes a corresponding relationship between the environment simulation mode and the simulation mode; Based on the electromagnetic environment simulation parameters, simulation is performed according to the target simulation mode to determine a target radio astronomy signal corresponding to the target environment simulation mode; Acquire a target radio frequency interference signal determined according to the electromagnetic environment simulation parameters; Performing superposition processing on the target radio astronomy signal and the target radio frequency interference signal to obtain a target environment simulation signal; A radio astronomy electromagnetic environment is constructed according to the target environment simulation signal.

[0006] In one embodiment, the electromagnetic environment simulation parameters include simulation center frequency, sampling frequency, simulation duration, radio astronomy signal simulation parameters, and radio frequency interference simulation parameters; the environment simulation mode includes fast radio burst electromagnetic environment simulation mode, neutral hydrogen electromagnetic environment simulation mode, and pulsar electromagnetic environment simulation mode; the simulation based on the electromagnetic environment simulation parameters and in accordance with the target simulation mode to determine the target radio astronomy signal corresponding to the target environment simulation mode includes: When the target environment simulation mode is a fast radio burst electromagnetic environment simulation mode, based on the electromagnetic environment simulation parameters, simulation is performed in accordance with a fast radio burst signal simulation mode to obtain a target fast radio burst signal; When the target environment simulation mode is a neutral hydrogen electromagnetic environment simulation mode, based on the electromagnetic environment simulation parameters, simulation is performed in a neutral hydrogen signal simulation mode to obtain a target neutral hydrogen signal; When the target environment simulation mode is a pulsar electromagnetic environment simulation mode, simulation is performed in a pulsar signal simulation manner based on the electromagnetic environment simulation parameters to obtain a target pulsar signal.

[0007] In one embodiment, the step of simulating based on the electromagnetic environment simulation parameters in accordance with a fast radio burst signal simulation method to obtain a target fast radio burst signal includes: Acquire first simulation parameters corresponding to the fast radio burst signal; the first simulation parameters include signal center frequency, bandwidth, pulse half-width, and dispersion; Generate a first pulse envelope and a first baseband signal according to the first simulation parameter; Generate a first intermediate signal according to the first pulse envelope and the first baseband signal; Performing dispersion simulation on the first intermediate signal to obtain an initial fast radio burst signal; The initial fast radio burst signal is subjected to noise addition processing according to the electromagnetic environment simulation parameters to obtain a target fast radio burst signal.

[0008] In one embodiment, the step of simulating according to a neutral hydrogen signal simulation method based on the electromagnetic environment simulation parameters to obtain a target neutral hydrogen signal includes: Acquire a simulation type and a second simulation parameter corresponding to the neutral hydrogen signal; the second simulation parameter includes a Doppler velocity and a relative acceleration; When the simulation type is a neutral hydrogen emission line signal, generating a neutral hydrogen emission line signal according to the second simulation parameter; In the case where the simulation type is a neutral hydrogen absorption line signal, determining a target filter according to the simulation center frequency, the second simulation parameter and a preset filter parameter; Obtaining Gaussian white noise, and using the Gaussian white noise as target background noise; The target background noise is filtered by the target filter to obtain a neutral hydrogen absorption line signal; According to the electromagnetic environment simulation parameters, the neutral hydrogen emission line signal or the neutral hydrogen absorption line signal is subjected to noise processing to obtain a target neutral hydrogen signal.

[0009] In one embodiment, the preset filter parameters include a stopband attenuation value; and determining the target filter according to the simulation center frequency, the second simulation parameter and the preset filter parameters includes: According to the simulation center frequency and the second simulation parameter, a relative frequency position of neutral hydrogen is obtained; the relative frequency position of neutral hydrogen includes a signal start frequency and a signal cutoff frequency; Generate a stopband frequency and a passband frequency according to the signal start frequency and the signal cutoff frequency; A target filter is determined according to the stopband frequency, the passband frequency and the stopband attenuation value; the target filter is a high-pass filter.

[0010] In one embodiment, the simulating according to the pulsar signal simulation method based on the electromagnetic environment simulation parameters to obtain the target pulsar signal includes: Obtaining a third simulation parameter corresponding to the pulsar signal; Generate a second pulse envelope and a second baseband signal according to the third simulation parameter; the second pulse envelope includes a single-peak pulse, a multi-peak pulse, a micro-pulse and a giant pulse; generating a second intermediate signal according to the second pulse envelope and the second baseband signal; Performing dispersion simulation on the second intermediate signal to obtain an initial pulsar signal; According to the electromagnetic environment simulation parameters, the initial pulsar signal is subjected to noise processing to obtain a target pulsar signal.

[0011] In one embodiment, the electromagnetic environment simulation parameters include a simulation center frequency, a sampling frequency, a simulation duration, a radio astronomy signal simulation parameter, and a radio frequency interference simulation parameter; the target radio frequency interference signal includes a broadband radio frequency interference signal; and obtaining the target radio frequency interference signal determined according to the electromagnetic environment simulation parameters includes: Obtaining a fourth simulation parameter corresponding to the broadband radio frequency interference signal; generating a third pulse envelope and a third baseband signal according to the fourth simulation parameter; Generate single carrier pulse interference according to the simulation center frequency, the first target parameter in the fourth simulation parameter and the third pulse envelope; the first target parameter includes the pulse center frequency and the pulse half-height full width; Generate random noise pulse interference according to the simulation center frequency, the second target parameter in the fourth simulation parameter, the third pulse envelope and the third baseband signal; the second target parameter includes bandwidth and pulse half-height full width; Generate linear frequency modulation pulse interference according to the simulation center frequency, the third target parameter in the fourth simulation parameter and the third pulse envelope; the third target parameter includes the pulse center frequency, bandwidth and pulse half-maximum full width; According to the electromagnetic environment simulation parameters, a target radio frequency interference signal is determined from the single carrier pulse interference, the random noise pulse interference and the linear frequency modulation pulse interference.

[0012] In one embodiment, constructing a radio astronomy electromagnetic environment according to the target environment simulation signal includes: Performing fixed-point quantization processing on the target environment simulation signal to obtain a quantized environment simulation signal; Transmitting the quantized environment simulation signal to a target software radio transmission platform; Based on the target software radio transmission platform and the quantized environment simulation signal, a radio astronomy electromagnetic environment is constructed.

[0013] In a second aspect, the present application also provides a radio astronomy electromagnetic environment simulation and construction device, the device comprising: An acquisition module, used to acquire electromagnetic environment simulation parameters and a target environment simulation mode; the target environment simulation mode includes at least any one of a plurality of environment simulation modes; A simulation mode determination module, used to determine a target simulation mode corresponding to the target environment simulation mode according to a preset corresponding relationship; the preset corresponding relationship includes a corresponding relationship between the environment simulation mode and the simulation mode; A radio astronomy signal determination module, configured to perform simulation according to the target simulation mode based on the electromagnetic environment simulation parameters, and determine a target radio astronomy signal corresponding to the target environment simulation mode; A radio frequency interference signal acquisition module, used to acquire a target radio frequency interference signal determined according to the electromagnetic environment simulation parameters; A processing module, used for superimposing the target radio astronomy signal and the target radio frequency interference signal to obtain a target environment simulation signal; Electromagnetic environment construction is used to construct a radio astronomy electromagnetic environment according to the target environment simulation signal.

[0014] In a third aspect, the present application further provides a radio astronomy electromagnetic environment simulation system, the system comprising a radio astronomy electromagnetic environment simulation platform and a target software radio transmission platform; the radio astronomy electromagnetic environment simulation platform is communicatively connected with the target software radio transmission platform; The radio astronomy electromagnetic environment simulation platform is used to obtain electromagnetic environment simulation parameters and a target environment simulation mode; the target environment simulation mode includes at least any one of a plurality of environment simulation modes; according to a preset corresponding relationship, a target simulation mode corresponding to the target environment simulation mode is determined; the preset corresponding relationship includes a corresponding relationship between an environment simulation mode and a simulation mode; based on the electromagnetic environment simulation parameters, simulation is performed according to the target simulation mode to determine a target radio astronomy signal corresponding to the target environment simulation mode; a target radio frequency interference signal determined according to the electromagnetic environment simulation parameters is obtained; and the target radio astronomy signal and the target radio frequency interference signal are superimposed to obtain a target environment simulation signal; The target software radio transmission platform is used to construct a radio astronomy electromagnetic environment according to the target environment simulation signal.

[0015] In a fourth aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method described in any one of the embodiments of the first aspect are implemented.

[0016] In a fifth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the first aspect above are implemented.

[0017] In a sixth aspect, the present application further provides a computer program product, comprising a computer program, characterized in that when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the first aspect above are implemented.

[0018] The above-mentioned radio astronomy electromagnetic environment simulation and construction method, system and computer equipment; the radio astronomy electromagnetic environment simulation and construction method is applied to the radio astronomy electromagnetic environment simulation system; by obtaining the electromagnetic environment simulation parameters and the target environment simulation mode, it is possible to ensure that the generated target environment simulation signal is basically consistent with the actually observed radio astronomy signal; wherein the target environment simulation mode includes at least any one of a plurality of environment simulation modes; further, according to a preset corresponding relationship, a target simulation mode corresponding to the target environment simulation mode is determined; the preset corresponding relationship includes a corresponding relationship between the environment simulation mode and the simulation mode; based on the electromagnetic environment simulation parameters, simulation is performed according to the target simulation mode to determine the target radio astronomy signal corresponding to the target environment simulation mode; based on the preset corresponding relationship, the target environment simulation mode can be automatically selected according to different target environment simulation modes Selecting the most suitable simulation method to generate the corresponding target radio astronomy signal lays the foundation for enhancing the flexibility and adaptability of radio astronomy electromagnetic environment simulation; further, by obtaining the target radio frequency interference signal determined according to the electromagnetic environment simulation parameters, and superimposing the target radio astronomy signal and the target radio frequency interference signal to obtain the target environment simulation signal, it can ensure that the target environment simulation signal is closer to the actual situation, and improve the accuracy and authenticity of the target environment simulation signal; according to the target environment simulation signal, the radio astronomy electromagnetic environment is constructed, and a high degree of restoration of the complex radio astronomy electromagnetic environment is achieved, avoiding the problem of low flexibility in simulation and construction of radio astronomy electromagnetic environment caused by the inability to simulate the specified type of radio astronomy signal in the prior art, and improving the flexibility and adaptability of simulation and construction of radio astronomy electromagnetic environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An application environment diagram of a radio astronomy electromagnetic environment simulation and construction method in one embodiment; Figure 2 Schematic diagram of a flow chart of a radio astronomy electromagnetic environment simulation and construction method in one embodiment; Figure 3 Schematic diagram of a process flow of fast radio burst signal simulation steps in one embodiment; Figure 4 A schematic diagram of a simulation process of a target fast radio burst signal according to an embodiment; Figure 5 is a time-frequency diagram of a first intermediate signal and an initial fast radio burst signal in one embodiment; Figure 6 Schematic diagram of a process of simulating a neutral hydrogen signal in one embodiment; Figure 7 is a schematic diagram of a neutral hydrogen signal power spectrum in one embodiment; Figure 8 A schematic diagram of a flow chart of a pulsar signal simulation step in an embodiment; Fig. 9 is a time domain and frequency domain waveform diagram of the second intermediate signal in the first embodiment; Fig.10 is a time domain and frequency domain waveform diagram of the second intermediate signal in the second embodiment; Fig.11 is a time domain and frequency domain waveform diagram of the second intermediate signal in the third embodiment; Fig.12 A schematic diagram of a flow chart of target radio frequency interference signal simulation steps in one embodiment; Fig.13 A time domain and frequency domain waveform diagram of a single carrier pulse interference in an embodiment; Fig.14 A time domain and frequency domain waveform diagram of random noise pulse interference in an embodiment; Fig.15 A time domain and frequency domain waveform diagram of linear frequency modulation pulse interference in an embodiment; Fig.16 is a schematic diagram of a radio astronomy electromagnetic environment simulation system in one embodiment; Fig.17 is a structural block diagram of a radio astronomy electromagnetic environment simulation device in one embodiment; Fig.18 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] The radio astronomy electromagnetic environment simulation and construction method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other network servers. Among them, the terminal 102 can be, but is not limited to, various personal computers, laptops, tablet computers, and Internet of Things devices. The server 104 can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides cloud computing services.

[0022] In an exemplary embodiment, Figure 2 As shown, Figure 2The figure is a flow chart of a radio astronomy electromagnetic environment simulation and construction method in one embodiment; the radio astronomy electromagnetic environment simulation and construction method is applied to a radio astronomy electromagnetic environment simulation system, and includes the following steps: Step S201, obtaining electromagnetic environment simulation parameters and target environment simulation mode.

[0023] The target environment simulation mode includes at least one of a plurality of environment simulation modes. The environment simulation mode may include, but is not limited to, a fast radio burst electromagnetic environment simulation mode, a neutral hydrogen electromagnetic environment simulation mode, and a pulsar electromagnetic environment simulation mode.

[0024] Among them, the radio astronomy electromagnetic environment simulation system includes a radio astronomy electromagnetic environment simulation platform and a target software radio transmitting platform; wherein the radio astronomy electromagnetic environment simulation platform is communicatively connected with the target software radio transmitting platform; wherein the radio astronomy electromagnetic environment simulation platform may include but is not limited to a terminal and electromagnetic environment construction software; the radio astronomy electromagnetic environment simulation platform is used to generate a target environment simulation signal according to electromagnetic environment simulation parameters and a target environment simulation mode, and transmit the target environment simulation signal to the target software radio transmitting platform; the radio astronomy electromagnetic environment simulation platform is also used to configure electromagnetic environment simulation parameters and a target environment simulation mode; the target software radio transmitting platform may include but is not limited to a software defined radio (SDR) device and an antenna; the target software radio transmitting platform is used to construct a radio astronomy electromagnetic environment according to the target environment simulation signal.

[0025] It should be noted that due to the limitations of the transmission capability of the software radio SDR equipment, when the radio astronomy electromagnetic environment simulation system is working, it is necessary to configure the electromagnetic environment simulation parameters and the target environment simulation mode in advance according to actual needs.

[0026] Among them, the electromagnetic environment simulation parameters at least include the simulation center frequency, sampling frequency, simulation duration, radio astronomy signal simulation parameters and radio frequency interference simulation parameters. Among them, the simulation center frequency refers to the center position of the main frequency band of concern in the frequency domain; the simulation center frequency is the reference frequency for radio astronomy signal simulation, which determines the frequency band range and working frequency band of the simulation. It can be understood that choosing a suitable simulation center frequency can ensure that the simulated signal covers the main frequency band of the celestial body of interest to transmit or receive signals. It should be noted that the simulation center frequency needs to be set according to the performance of the software radio SDR device, and is not specifically limited here; for example, the simulation center frequency is Fc MHz.

[0027] The sampling frequency refers to the number of times a continuous-time signal is discretized per second, that is, the number of data points collected within a certain period of time. The sampling frequency needs to be set based on the Nyquist sampling theorem and needs to ensure that the signal is not distorted. No specific restrictions are made here; for example, the sampling frequency is F MHz.

[0028] The simulation duration refers to the duration of the simulation process. The simulation duration determines the time range covered by the simulation and the dynamic change process that can be simulated. The simulation duration needs to be set according to the actual simulation requirements without making specific restrictions; for example, the duration of a single simulation T Second.

[0029] Among them, the radio astronomy signal simulation parameters are used to simulate different types of radio astronomy signals. The radio astronomy signal simulation parameters at least include the first simulation parameter corresponding to the fast radio burst signal, the simulation type and the second simulation parameter corresponding to the neutral hydrogen signal, and the third simulation parameter corresponding to the pulsar signal; wherein the first simulation parameter includes the signal center frequency, bandwidth, pulse half-maximum full width and dispersion; the second simulation parameter includes Doppler velocity and relative acceleration; the third simulation parameter includes the number of pulses, relative amplitude, relative center position, signal center frequency, bandwidth, pulse half-maximum full width and dispersion.

[0030] Among them, the RF interference simulation parameters are used to simulate different types of RF interference; for example, the RF interference simulation parameters at least include a fourth simulation parameter corresponding to a broadband RF interference signal; wherein the fourth simulation parameter includes a pulse full width at half maximum, a pulse center frequency, and a bandwidth.

[0031] Step S202: determining a target simulation mode corresponding to a target environment simulation mode according to a preset corresponding relationship.

[0032] The preset corresponding relationship includes the corresponding relationship between the environment simulation mode and the simulation method. It can be understood that each environment simulation mode has a unique corresponding simulation method.

[0033] It should be noted that the simulation method needs to be set accordingly according to the time domain characteristics and frequency domain characteristics of different types of radio astronomy signals to ensure that the corresponding types of radio astronomy signals can be accurately simulated.

[0034] Among them, the environmental simulation modes include fast radio burst electromagnetic environment simulation mode, neutral hydrogen electromagnetic environment simulation mode and pulsar electromagnetic environment simulation mode.

[0035] Among them, Fast Radio Burst (FRB) is a short and intense radio wave burst event from the depths of the universe, which usually lasts from a few milliseconds to a few seconds. The Fast Radio Burst electromagnetic environment simulation mode is used to simulate the astronomical phenomenon of fast radio bursts in order to evaluate the ability of radio telescope systems in discovering and analyzing fast radio burst signals.

[0036] Among them, neutral hydrogen is one of the most abundant elements in the universe; the neutral hydrogen electromagnetic environment simulation mode is used to simulate neutral hydrogen signals in order to evaluate the ability of radio telescope systems in discovering and analyzing neutral hydrogen signals.

[0037] Pulsars are a type of rapidly rotating neutron star whose strong magnetic field and high density enable them to emit periodic electromagnetic radiation. The pulsar electromagnetic environment simulation mode is used to simulate periodic pulsar signals in order to evaluate the ability of radio telescope systems to capture and analyze pulsar signals.

[0038] Step S203 , based on the electromagnetic environment simulation parameters, simulation is performed in accordance with a target simulation mode to determine a target radio astronomy signal corresponding to the target environment simulation mode.

[0039] The target radio astronomy signal includes at least one of a target fast radio burst signal, a target neutral hydrogen signal and a target pulsar signal.

[0040] Step S204: acquiring a target radio frequency interference signal determined according to electromagnetic environment simulation parameters.

[0041] Among them, the target RF interference signal is a key component to simulate various artificial and natural RF interference sources that may be encountered in the real environment. Among them, the target RF interference signal includes at least broadband RF interference signals and narrowband RF interference signals. Among them, narrowband RF interference signals are the most likely interference on the ground, and the interference sources are very wide, including but not limited to broadcasting, wireless communication, etc.

[0042] It should be noted that in radio astronomy observations, radio frequency interference (RFI) is an important factor affecting the quality of observation data and scientific discoveries. In particular, short-duration and wide-spectrum pulse-type broadband radio frequency interference signals and long-duration narrowband interference signals have a significant impact on the detection and identification of radio astronomy signals such as fast radio burst signals and pulsar signals.

[0043] In an exemplary embodiment, it supports generating a narrowband radio frequency interference signal according to a typical modulation signal, and the modulation signal type may include but is not limited to AM (Amplitude Modulation), CW (Continuous Wave), ASK (Amplitude Shift Keying), and BPSK (Binary Phase Shift Keying).

[0044] For example, a narrowband radio frequency interference signal is used as an example to obtain simulation parameters corresponding to the narrowband radio frequency interference signal. The simulation parameters may include, but are not limited to, modulation signal type, center frequency, , bandwidth BW, code rate R c , start time T b , Signal duration T L The simulation parameters need to be set according to actual needs and are not specifically limited here. For CW modulation, the narrowband RF interference signal is simulated according to formula (1).

[0045] (1) For AM modulation, the narrowband RF interference signal is simulated according to formula (2).

[0046] (2) in, m(t) Indicates bandwidth is BW Band-limited Gaussian noise; ,in, N g (t) represents complex Gaussian noise, and Filter represents a low-pass filter.

[0047] For ASK modulation, the narrowband RF interference signal is simulated according to formula (3).

[0048] (3) in, g(t) is a rectangular shaped pulse, is the code element width.

[0049] For BPSK modulation, the narrowband RF interference signal is simulated according to formula (4).

[0050] (4) in, g(t) is a rectangular shaped pulse, is the code element width.

[0051] Step S205 , superimposing the target radio astronomy signal and the target radio frequency interference signal to obtain a target environment simulation signal.

[0052] Exemplarily, an interference power coefficient is obtained, and the power of the target radio frequency interference signal is adjusted according to the interference power coefficient to obtain an adjusted target radio frequency interference signal; the target radio astronomy signal and the adjusted target radio frequency interference signal are superimposed to obtain a target environment simulation signal. The interference power coefficient may be randomly generated from an interference power range or may be set by a user, and is not specifically limited here.

[0053] Step S206, constructing a radio astronomy electromagnetic environment according to the target environment simulation signal.

[0054] It can be understood that by superimposing the target radio astronomy signal and the target radio frequency interference signal, a more realistic and reliable target environment simulation signal can be obtained; and then the target environment simulation signal is transmitted to the target software radio transmission platform, so as to realize the simulation and construction of the radio astronomy electromagnetic environment.

[0055] In this embodiment, a radio astronomy electromagnetic environment simulation and construction method is applied to a radio astronomy electromagnetic environment simulation system; by obtaining electromagnetic environment simulation parameters and target environment simulation mode, it is possible to ensure that the generated target environment simulation signal is basically consistent with the actually observed radio astronomy signal; further, according to a preset corresponding relationship, a target simulation mode corresponding to the target environment simulation mode is determined; based on the electromagnetic environment simulation parameters, simulation is performed according to the target simulation mode to determine the target radio astronomy signal corresponding to the target environment simulation mode; based on the preset corresponding relationship, the most suitable simulation mode can be automatically selected according to different target environment simulation modes to generate the corresponding target radio astronomy signal, in order to enhance the sensitivity of radio astronomy electromagnetic environment simulation. Furthermore, by acquiring the target radio frequency interference signal determined according to the electromagnetic environment simulation parameters, and superimposing the target radio astronomy signal and the target radio frequency interference signal, the target environment simulation signal is obtained, which can ensure that the target environment simulation signal is closer to the actual situation, and improve the accuracy and authenticity of the target environment simulation signal; according to the target environment simulation signal, the radio astronomy electromagnetic environment is constructed, and a high degree of restoration of the complex radio astronomy electromagnetic environment is achieved, avoiding the problem in the prior art that the specified type of radio astronomy signal cannot be simulated, resulting in low flexibility in the simulation and construction of the radio astronomy electromagnetic environment, and improving the flexibility and adaptability of the simulation and construction of the radio astronomy electromagnetic environment.

[0056] In one embodiment, the environment simulation mode includes a fast radio burst electromagnetic environment simulation mode, a neutral hydrogen electromagnetic environment simulation mode, and a pulsar electromagnetic environment simulation mode; based on the electromagnetic environment simulation parameters, simulation is performed in accordance with a target simulation mode to determine a target radio astronomy signal corresponding to the target environment simulation mode, including the following steps: Step 1: When the target environment simulation mode is a fast radio burst electromagnetic environment simulation mode, simulation is performed according to a fast radio burst signal simulation method based on electromagnetic environment simulation parameters to obtain a target fast radio burst signal.

[0057] Among them, the fast radio burst electromagnetic environment simulation mode is used to simulate the fast radio burst astronomical phenomenon in order to evaluate the ability of the radio telescope system in discovering and analyzing fast radio burst signals.

[0058] Step 2: When the target environment simulation mode is a neutral hydrogen electromagnetic environment simulation mode, simulation is performed in a neutral hydrogen signal simulation mode based on electromagnetic environment simulation parameters to obtain a target neutral hydrogen signal.

[0059] Among them, the neutral hydrogen electromagnetic environment simulation mode is used to simulate neutral hydrogen signals in order to evaluate the ability of the radio telescope system in discovering and analyzing neutral hydrogen signals.

[0060] Step 3: When the target environment simulation mode is the pulsar electromagnetic environment simulation mode, simulation is performed in accordance with the pulsar signal simulation method based on the electromagnetic environment simulation parameters to obtain the target pulsar signal.

[0061] Among them, the pulsar electromagnetic environment simulation mode is used to simulate periodic pulsar signals in order to evaluate the ability of the radio telescope system to capture and analyze pulsar signals.

[0062] In this embodiment, based on different target environment simulation modes, namely the fast radio burst electromagnetic environment simulation mode, the neutral hydrogen electromagnetic environment simulation mode and the pulsar electromagnetic environment simulation mode, it is helpful to comprehensively test the radio telescope system's ability to detect different types of radio astronomical signals, and further improve the flexibility and adaptability of radio astronomy electromagnetic environment simulation.

[0063] In one embodiment, Figure 3 As shown, Figure 3 The figure is a flow chart of the fast radio burst signal simulation steps in one embodiment; based on the electromagnetic environment simulation parameters, the simulation is performed in accordance with the fast radio burst signal simulation method to obtain the target fast radio burst signal, including the following steps: Step S301, obtaining a first simulation parameter corresponding to a fast radio burst signal.

[0064] The first simulation parameters include signal center frequency, bandwidth, pulse full width at half maximum, and dispersion.

[0065] In an exemplary embodiment, the signal center frequency is f 0 MHz, bandwidth is BW MHz, pulse full width at half maximum is FWHM Seconds; wherein, the first simulation parameter can be generated in a random mode or set in a fixed mode, and is not specifically limited here.

[0066] Step S302: Generate a first pulse envelope and a first baseband signal according to the first simulation parameter.

[0067] The first pulse envelope has a Gaussian profile. The first baseband signal is simulated using zero intermediate frequency complex Gaussian band-limited noise. For example, the first baseband signal is m(t) ; m(t) Indicates bandwidth is BW Band-limited Gaussian noise; ,in, N g (t) represents complex Gaussian noise, and Filter represents a low-pass filter.

[0068] In an exemplary embodiment, the first pulse envelope adopts a Gaussian form and is simulated according to formula (5).

[0069] (5) in, A is the amplitude, t For the current moment, t c is the pulse center time, is the standard deviation, and the starting point of the pulse profile is set to , the end point is , pulse width It should be noted that the relationship between the pulse width of the Gaussian pulse profile and the pulse half-height full width is applicable to all single Gaussian pulses in the following embodiments and will not be described again.

[0070] Step S303: Generate a first intermediate signal according to the first pulse envelope and the first baseband signal.

[0071] Exemplarily, according to the first pulse envelope and the first baseband signal in formula (5): m(t) And the signal center frequency f 0 MHz, the first intermediate signal is generated according to formula (6) s(t) .

[0072] (6) Step S304: performing dispersion simulation on the first intermediate signal to obtain an initial fast radio burst signal.

[0073] Exemplarily, the electromagnetic environment simulation parameters include the simulation center frequency Fc MHz, sampling frequency F MHz, simulation time T seconds. When performing dispersion simulation on the first intermediate signal, it is necessary to configure the dispersion amount DM; the dispersion amount DM can be randomly generated or fixedly configured, and is not specifically limited here. The interstellar medium transmission function corresponding to the dispersion is shown in formula (7).

[0074] (7) Where D is the interstellar medium dispersion constant (4148.808MHz 2 pc -1 cm 3 s), f 0 is the center frequency, f For relative f 0 frequency.

[0075] Furthermore, based on the interstellar medium transmission function corresponding to the dispersion, that is, formula (7), the dispersion simulation is performed on the first intermediate signal. s(t) Perform fast Fourier transform FFT to get the signal spectrum s(f) , the dispersion effect simulation is shown in formula (8).

[0076] (8) Further, The initial fast radio burst signal is obtained by performing inverse fast Fourier transform IFFT. The initial fast radio burst signal is shown in formula (9).

[0077] (9) Further, optionally, the initial fast radio burst signal , down-convert to 0 frequency according to Fc, and perform power normalization.

[0078] Step S305: performing noise processing on the initial fast radio burst signal according to the electromagnetic environment simulation parameters to obtain the target fast radio burst signal.

[0079] For example, according to the simulation duration set T Seconds, randomly generated start time T b :0< T b<T- T FRB , according to the preset signal-to-noise ratio, the initial fast radio burst signal Add Gaussian white noise noise(t) , get the target fast radio burst signal s c (t) , as shown in formula (10) 。 in, T Greater than FRB pulse width T FRB 。

[0080] (10) In an exemplary embodiment, the schematic diagram of each signal during the simulation of the target fast radio burst signal is as follows: Figure 4 and Figure 5 As shown. Among them, Figure 4 It includes a first pulse envelope signal, a first baseband signal, a first intermediate signal and a spectrum of the first intermediate signal. Figure 5 Includes a time-frequency diagram of the first intermediate signal and a time-frequency diagram of the initial fast radio burst signal.

[0081] In this embodiment, a first pulse envelope and a first baseband signal are generated by using a first simulation parameter corresponding to a fast radio burst signal, and a first intermediate signal is further synthesized. A dispersion simulation is performed on the first intermediate signal to obtain an initial fast radio burst signal, thereby ensuring that the initial fast radio burst signal is basically consistent with the actual situation in terms of spectral characteristics, time structure, and propagation effects, and providing a reliable data basis for studying the reception and detection of fast radio burst signals. Furthermore, the initial fast radio burst signal is noised according to the electromagnetic environment simulation parameters to generate a target fast radio burst signal. By adding noise that meets the actual observation conditions, the simulation results are closer to the actual electromagnetic environment, thereby improving the accuracy and reliability of the simulation of the target fast radio burst signal.

[0082] In one embodiment, Figure 6 As shown, Figure 6 FIG. 1 is a flow chart of a neutral hydrogen signal simulation step in an embodiment; based on the electromagnetic environment simulation parameters, simulation is performed in accordance with the neutral hydrogen signal simulation method to obtain a target neutral hydrogen signal, including the following steps: Step S601, obtaining a simulation type and a second simulation parameter corresponding to a neutral hydrogen signal.

[0083] It should be noted that there are two types of neutral hydrogen signals in radio astronomy observations, including emission line signals and absorption line signals. The frequency of neutral hydrogen signals is Since there is a high degree of motion between celestial bodies, neutral hydrogen also has relative motion in its own celestial system. Therefore, the neutral hydrogen signal is significantly affected by the Doppler effect, including the relative radial motion speed. v (m / s) caused by Doppler shift and relative acceleration v a (m / s 2 ) causes line broadening.

[0084] The simulation types include neutral hydrogen emission line signals and neutral hydrogen absorption line signals; and the second simulation parameters include Doppler velocity and relative acceleration.

[0085] Step S602: when the simulation type is a neutral hydrogen emission line signal, generate a neutral hydrogen emission line signal according to a second simulation parameter.

[0086] Exemplarily, the electromagnetic environment simulation parameters include the simulation center frequency Fc MHz, sampling frequency F MHz, simulation time T In the case of the simulation type of neutral hydrogen emission line signal, according to the neutral hydrogen signal frequency f HI , Doppler velocity v and relative acceleration v a , and generate the neutral hydrogen emission line signal according to formula (11).

[0087] (11) Step S603: when the simulation type is a neutral hydrogen absorption line signal, a target filter is determined according to the simulation center frequency, the second simulation parameter and the preset filter parameter.

[0088] Among them, the preset filter parameters need to be set according to actual filtering requirements and are not specifically limited here.

[0089] Step S604: Obtain Gaussian white noise, and use the Gaussian white noise as target background noise.

[0090] Step S605: filtering the target background noise through a target filter to obtain a neutral hydrogen absorption line signal.

[0091] For example, for the neutral hydrogen absorption line signal, the energy in the frequency band where the signal is located is absorbed, forming a "notch" on the spectrum. The neutral hydrogen absorption line signal simulation can be achieved by designing a target filter, as shown in formula (12).

[0092] (12) in, is the target filter; The relative simulated center frequency formed by Doppler motion Fc The signal starting frequency; The relative simulated center frequency formed by Doppler motion Fc The signal cutoff frequency; is the target background noise.

[0093] In an exemplary embodiment, the neutral hydrogen emission line signal power spectrum and the neutral hydrogen absorption line signal power spectrum are as follows: Figure 7 shown.

[0094] Step S606: performing noise processing on the neutral hydrogen emission line signal or the neutral hydrogen absorption line signal according to the electromagnetic environment simulation parameters to obtain a target neutral hydrogen signal.

[0095] Exemplarily, according to a preset signal-to-noise ratio, the neutral hydrogen emission line signal Or neutral hydrogen absorption line signal Add Gaussian white noise noise(t) , get the target neutral hydrogen signal s c (t) , as shown in formula (13).

[0096] (13) In this embodiment, based on the second simulation parameter corresponding to the neutral hydrogen signal, a neutral hydrogen emission line signal can be accurately generated; by filtering the target background noise through the target filter, the neutral hydrogen absorption line signal can be accurately obtained; and then according to the neutral hydrogen emission line signal and the neutral hydrogen absorption line signal, the initial neutral hydrogen signal can be determined; further, according to the electromagnetic environment simulation parameters, the initial neutral hydrogen signal is noise-added to obtain the target neutral hydrogen signal, which can effectively simulate the neutral hydrogen signal characteristics in the real cosmic environment, and provide accurate and reliable neutral hydrogen signal simulation data for the debugging and testing of radio telescopes.

[0097] In one embodiment, the preset filter parameters include a stopband attenuation value; determining a target filter according to the simulation center frequency, the second simulation parameter and the preset filter parameters comprises the following steps: Step 1, obtaining the relative frequency position of neutral hydrogen according to the simulation center frequency and the second simulation parameter.

[0098] The relative frequency position of neutral hydrogen includes the signal start frequency and the signal cutoff frequency.

[0099] The signal start frequency refers to the signal start frequency relative to the simulation center frequency formed by the Doppler motion; the signal cutoff frequency refers to the signal cutoff frequency relative to the simulation center frequency formed by the Doppler motion.

[0100] For example, according to the simulation center frequency Fc MHz and neutral hydrogen signal frequency f HI , Doppler velocity v and relative acceleration v a According to formula (14), the relative frequency position of neutral hydrogen, that is, the signal starting frequency and the signal cutoff frequency, is obtained.

[0101] (14) in, The relative simulated center frequency formed by Doppler motion Fc The signal starting frequency; The relative simulated center frequency formed by Doppler motion Fc The signal cutoff frequency.

[0102] Step 2: Generate the stopband frequency and the passband frequency according to the signal start frequency and the signal cutoff frequency.

[0103] For example, based on formula (14), according to the signal start frequency and the signal cutoff frequency, the stopband frequency is generated as And the passband frequency is .

[0104] Step 3: Determine the target filter according to the stopband frequency, passband frequency and stopband attenuation value.

[0105] Among them, the target filter is a high-pass filter.

[0106] For example, according to the stopband frequency , passband frequency And the stopband attenuation value As, the corresponding high-pass filter can be designed .

[0107] In this embodiment, the accurate relative frequency position of neutral hydrogen can be obtained based on the simulation center frequency and the second simulation parameter; then, based on the signal starting frequency and the signal cutoff frequency, the stopband frequency and the passband frequency are generated, laying the foundation for generating a reliable and accurate target filter; then, based on the stopband frequency, the passband frequency and the stopband attenuation value, the target filter is determined, laying the foundation for accurate simulation of the neutral hydrogen absorption line signal.

[0108] In one embodiment, Figure 8 As shown, Figure 8 The flowchart of the pulsar signal simulation step in one embodiment is as follows; based on the electromagnetic environment simulation parameters, the pulsar signal simulation method is used to simulate and obtain the target pulsar signal, including the following steps: Step S801, obtaining a third simulation parameter corresponding to a pulsar signal.

[0109] The third simulation parameters include the number of pulses, relative amplitude, relative center position, signal center frequency, bandwidth, pulse half-width and dispersion.

[0110] It should be noted that the number of pulses determines the specific type of pulsar signal, which needs to be set according to actual needs and is not specifically limited here.

[0111] Exemplarily, the number of pulses is recorded as N. For a single pulse, N=1, and other parameters are set in order as required, wherein the pulse width is usually in the microsecond or millisecond order; for multiple pulses, N>1, and other parameters are set in order as required, wherein the pulse width is usually in the microsecond or millisecond order; for micropulses, N>1, and other parameters are set in order as required. Note that micropulses have a fine structure and can be approximately regarded as consisting of multiple pulses with very small pulse widths, and the overall width is usually in the microsecond or millisecond order; for giant pulses: N=1, and the pulse width is usually in the nanosecond order.

[0112] Step S802: Generate a second pulse envelope and a second baseband signal according to a third simulation parameter.

[0113] The second pulse envelope includes a single-peak pulse, a multi-peak pulse, a micro-pulse and a giant pulse. The second baseband signal is simulated using zero intermediate frequency complex Gaussian band-limited noise.

[0114] For example, pulsar signals usually consist of T PRP Since the SDR device adopts a cyclic transmission mode, the simulation duration should be set to the repetition period when simulating pulsar signals. T = T PRP The envelope profiles of pulsars vary, including at least one of single-peak pulses, multi-peak pulses, micropulses and giant pulses. Different pulse envelope profiles can be generated by combining multiple Gaussian pulses. Specifically, according to the third simulation parameter, the second pulse envelope can be generated according to formula (15).

[0115] (15) in, N is the number of Gaussian pulses, k Indicates the pulse number, A k is the relative amplitude, tc k is the relative center position, is the pulse full width at half maximum, is the standard deviation, The pulse profile starts at ; Refers to the relative center position of the first pulse; the end point is ;in, Refers to the relative center position of the Nth pulse; the overall pulse width is .

[0116] It should be noted that the specific implementation method of generating the second baseband signal according to the third simulation parameter is the same as the implementation method of generating the first baseband signal according to the first simulation parameter recorded in the above embodiment, and will not be repeated here.

[0117] Step S803: Generate a second intermediate signal according to the second pulse envelope and the second baseband signal.

[0118] Step S804: performing dispersion simulation on the second intermediate signal to obtain an initial pulsar signal.

[0119] It should be noted that the specific implementation of step S803-step S804 is the same as the implementation of step S303-step S304 recorded in the above embodiment, and the specific process will not be repeated here.

[0120] For example, see Figure 9-11 , Fig. 9 The second intermediate signal is a time domain and frequency domain waveform when it is a plurality of pulse envelope profiles; Fig.10 are the time domain and frequency domain waveforms when the second intermediate signal is a giant pulse; Fig.11 ] are the time domain and frequency domain waveforms when the second intermediate signal is a micro pulse.

[0121] Step S805: performing noise processing on the initial pulsar signal according to the electromagnetic environment simulation parameters to obtain the target pulsar signal.

[0122] For example, the pulsar signal is recorded as , start time T b =0, T p is the pulse width, and according to the preset signal-to-noise ratio, the pulsar signal Add Gaussian white noise noise(t) , get the target pulsar signal s c (t) : (16) In this embodiment, a second pulse envelope and a second baseband signal are generated by a third simulation parameter corresponding to the pulse signal, and a second intermediate signal is further synthesized. The second intermediate signal is subjected to dispersion simulation to obtain an initial pulsar signal, thereby ensuring that the initial pulsar signal is basically consistent with the actual situation in terms of spectral characteristics, time structure, and propagation effects, and providing a reliable data basis for the discovery and analysis of pulsar signals by radio telescopes. Furthermore, the initial pulsar signal is subjected to noise processing according to the electromagnetic environment simulation parameters to generate a target pulsar signal. By adding noise that meets the actual observation conditions, the target pulsar signal is made closer to the actual pulsar signal, thereby improving the accuracy and reliability of the simulation of the target pulsar signal.

[0123] In one embodiment, Fig.12 As shown, Fig.12 The present invention is a flow chart of a target radio frequency interference signal simulation step in an embodiment; electromagnetic environment simulation parameters include simulation center frequency, sampling frequency, simulation duration, radio astronomy signal simulation parameters and radio frequency interference simulation parameters; the target radio frequency interference signal includes a broadband radio frequency interference signal; obtaining the target radio frequency interference signal determined according to the electromagnetic environment simulation parameters includes the following steps: Step S1201, obtaining a fourth simulation parameter corresponding to the broadband radio frequency interference signal.

[0124] The fourth simulation parameter includes the pulse half-width, pulse center frequency, and bandwidth; for example, the pulse width of a single pulse is ; The pulse center frequency is f 0 ; The bandwidth is BW .

[0125] Step S1202: Generate a third pulse envelope and a third baseband signal according to a fourth simulation parameter.

[0126] Exemplarily, according to the fourth simulation parameter, a third pulse envelope and a third baseband signal are generated, and the third pulse envelope is recorded as , the third baseband signal is recorded as m(t) ,in, is the pulse width. The specific calculation process is the same as the pulse width recorded in the above embodiment formula (5) Full Width at Half Maximum FWHM The relationship (i.e. ) are the same and will not be repeated here.

[0127] It should be noted that the specific implementation method of generating the third baseband signal according to the fourth simulation parameter is the same as the specific implementation method of generating the first baseband signal according to the first simulation parameter recorded in the above embodiment, and will not be repeated here.

[0128] Step S1203: Generate single carrier pulse interference according to the simulation center frequency, the first target parameter in the fourth simulation parameter, and the third pulse envelope.

[0129] The first target parameter includes the pulse center frequency and the pulse half-width.

[0130] For example, according to the simulation center frequency Fc , pulse center frequency f 0 、 Pulse Width , and the third pulse envelope , generate single carrier pulse interference according to formula (17). The time domain and frequency domain waveforms corresponding to the single carrier pulse interference are as follows: Fig.13 shown.

[0131] (17) Step S1204: Generate random noise pulse interference according to the simulation center frequency, the second target parameter in the fourth simulation parameter, the third pulse envelope, and the third baseband signal.

[0132] The second target parameter includes bandwidth and pulse half-width.

[0133] For example, according to the simulation center frequency Fc ,bandwidth BW , Pulse Width , the third pulse envelope And the third baseband signal m(t) , generate random noise pulse interference according to formula (18); the time domain and frequency domain waveforms corresponding to the random noise pulse interference are as follows Fig.14 shown.

[0134] (18) Step S1205: Generate linear frequency modulation pulse interference according to the simulation center frequency, the third target parameter in the fourth simulation parameter, and the third pulse envelope.

[0135] Among them, the third target parameter includes pulse center frequency, bandwidth and pulse half-maximum full width.

[0136] For example, according to the simulation center frequency Fc, bandwidth BW , Pulse Width , and the third pulse envelope , according to formula (19), linear frequency modulation pulse interference is generated. The time domain and frequency domain waveforms corresponding to the linear frequency modulation pulse interference are as follows: Fig.15 shown.

[0137] (19) Among them, the starting frequency , modulation rate .

[0138] Step S1206, determining a target radio frequency interference signal from single carrier pulse interference, random noise pulse interference, and linear frequency modulation pulse interference according to the electromagnetic environment simulation parameters.

[0139] It should be noted that after the simulation of a single pulse, i.e., the target RF interference signal, is completed, the pulse repetition period can be set to be generated randomly or according to configuration to generate a pulse train. Further, optionally, the pulse train power can be normalized. At this time, the pulse train is the target RF interference signal.

[0140] In this embodiment, based on the fourth simulation parameter corresponding to the broadband RF interference signal, three types of broadband RF interference signals, namely single carrier pulse, random noise pulse and linear frequency modulation pulse, can be simulated respectively. Different types of RF interference can be selected for testing as needed, which not only increases the diversity of test scenarios, but also enables customized design of experiments for specific problems.

[0141] In one embodiment, constructing a radio astronomy electromagnetic environment according to a target environment simulation signal includes the following steps: Step 1: Perform fixed-point quantization processing on the target environment simulation signal to obtain a quantized environment simulation signal.

[0142] Exemplarily, the method for performing fixed-point quantization processing on the target environment simulation signal may be: performing data format conversion on the target environment simulation signal according to the bit width of a digital-to-analog converter supported by the SDR device.

[0143] Step 2: Transmit the quantized environment simulation signal to the target software radio transmitting platform.

[0144] The format of the quantized environment simulation signal is the same as the format supported by the target software radio transmitting platform, so as to ensure that the quantized environment simulation signal can be successfully transmitted from the radio astronomy electromagnetic environment simulation platform to the target software radio transmitting platform.

[0145] Step 3: construct the radio astronomy electromagnetic environment based on the target software radio transmission platform and the quantized environmental simulation signal.

[0146] Exemplarily, the target software radio transmitting platform includes an SDR device, and the main working parameters of the SDR device are set, including transmission frequency, transmission gain, filter bandwidth, number of transmissions, etc.; through network communication, according to a preset communication protocol, the quantitative environment simulation signal and the main working parameters are transmitted from the radio astronomy electromagnetic environment simulation platform to the SDR device; further, through network communication, the radio astronomy electromagnetic environment simulation platform sends instructions to control the SDR device to start and stop transmission.

[0147] In this embodiment, based on the target software radio transmission platform and the quantized environment simulation signal, the radio astronomy electromagnetic environment is constructed, providing a low-cost and highly flexible simulation source for the calibration, debugging and testing of the radio astronomy system.

[0148] The above-mentioned radio astronomy electromagnetic environment simulation and construction method is applied to a radio astronomy electromagnetic environment simulation system; by obtaining electromagnetic environment simulation parameters and target environment simulation mode, it is possible to ensure that the generated target environment simulation signal is basically consistent with the actually observed radio astronomy signal; wherein the target environment simulation mode includes at least any one of a plurality of environment simulation modes; further, according to a preset corresponding relationship, a target simulation mode corresponding to the target environment simulation mode is determined; the preset corresponding relationship includes a corresponding relationship between the environment simulation mode and the simulation mode; based on the electromagnetic environment simulation parameters, simulation is performed according to the target simulation mode to determine the target radio astronomy signal corresponding to the target environment simulation mode; based on the preset corresponding relationship, the most suitable simulation mode can be automatically selected according to different target environment simulation modes to generate The corresponding target radio astronomy signal lays a foundation for enhancing the flexibility and adaptability of radio astronomy electromagnetic environment simulation; further, by obtaining the target radio frequency interference signal determined according to the electromagnetic environment simulation parameters, and superimposing the target radio astronomy signal and the target radio frequency interference signal, the target environment simulation signal is obtained, which can ensure that the target environment simulation signal is closer to the actual situation, and improve the accuracy and authenticity of the target environment simulation signal; according to the target environment simulation signal, the radio astronomy electromagnetic environment is constructed, and a high degree of restoration of the complex radio astronomy electromagnetic environment is achieved, avoiding the problem of low flexibility in simulation and construction of radio astronomy electromagnetic environment caused by the inability to simulate the specified type of radio astronomy signal in the prior art, and improving the flexibility and adaptability of simulation and construction of radio astronomy electromagnetic environment.

[0149] In one embodiment, a radio astronomy electromagnetic environment simulation system includes a radio astronomy electromagnetic environment simulation platform and a target software radio transmission platform; the radio astronomy electromagnetic environment simulation platform is communicatively connected with the target software radio transmission platform; A radio astronomy electromagnetic environment simulation platform, used for obtaining electromagnetic environment simulation parameters and a target environment simulation mode; the target environment simulation mode includes at least any one of a plurality of environment simulation modes; according to a preset corresponding relationship, determining a target simulation mode corresponding to the target environment simulation mode; the preset corresponding relationship includes a corresponding relationship between the environment simulation mode and the simulation mode; based on the electromagnetic environment simulation parameters, simulating according to the target simulation mode, determining a target radio astronomy signal corresponding to the target environment simulation mode; obtaining a target radio frequency interference signal determined according to the electromagnetic environment simulation parameters; superimposing the target radio astronomy signal and the target radio frequency interference signal to obtain a target environment simulation signal; The target software radio transmission platform is also used to construct the radio astronomy electromagnetic environment according to the target environment simulation signal.

[0150] The radio astronomy electromagnetic environment simulation platform is also used to configure electromagnetic environment simulation parameters and target environment simulation modes.

[0151] For example, see Fig.16 The radio astronomy electromagnetic environment simulation system includes a radio astronomy electromagnetic environment simulation platform and a target software radio transmission platform. The radio astronomy electromagnetic environment simulation platform is mainly used to simulate and add fast radio burst signals, neutral hydrogen signals, pulsar signals, broadband RFI and narrowband RFI, generate data required by SDR equipment, and control the operation of SDR equipment. The target software radio transmission platform includes software radio SDR equipment and antenna; SDR equipment is used for signal digital-to-analog conversion, filtering, and amplification; antenna is used for signal radiation.

[0152] In this embodiment, based on the radio astronomy electromagnetic environment simulation system, a high degree of restoration of a complex radio astronomy electromagnetic environment can be achieved, avoiding the problem in the prior art that a specified type of radio astronomy signal cannot be simulated, resulting in low flexibility in radio astronomy electromagnetic environment simulation and construction, thereby improving the flexibility and adaptability of radio astronomy electromagnetic environment simulation and construction.

[0153] In a specific embodiment, based on the radio astronomy electromagnetic environment simulation system, the radio astronomy electromagnetic environment simulation and construction method includes the following steps: Step 1: Configure electromagnetic environment simulation parameters and target environment simulation mode through the radio astronomy electromagnetic environment simulation platform.

[0154] Among them, the electromagnetic environment simulation parameters include the simulation center frequency Fc, the sampling frequency Fs and the simulation time T. For example, the simulation center frequency Fc is 1 GHz, the sampling frequency Fs is 2 GSPS and the simulation time T is 0.01 s, etc. Note that the simulation time is related to the SDR device's ability to store and transmit data and needs to be set reasonably.

[0155] Step 2: Determine the target simulation mode corresponding to the target environment simulation mode through the radio astronomy electromagnetic environment simulation platform according to the preset corresponding relationship; perform simulation according to the target simulation mode based on the electromagnetic environment simulation parameters to determine the target radio astronomy signal corresponding to the target environment simulation mode; obtain the target radio frequency interference signal determined according to the electromagnetic environment simulation parameters; and superimpose the target radio astronomy signal and the target radio frequency interference signal to obtain the target environment simulation signal.

[0156] Step 3: Transmit the target environment simulation signal from the radio astronomy electromagnetic environment simulation platform to the target software radio transmission platform through network communication.

[0157] Step 4: configure the operating parameters of the target software radio transmission platform.

[0158] Among them, the working parameters include transmission frequency, transmission gain, filter bandwidth, number of transmissions, etc.

[0159] Step 5: Based on the target software radio transmission platform and according to the target environment simulation signal, the radio astronomy electromagnetic environment is constructed.

[0160] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0161] Based on the same inventive concept, the embodiment of the present application also provides a radio astronomy electromagnetic environment simulation and construction device for implementing the radio astronomy electromagnetic environment simulation and construction method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more radio astronomy electromagnetic environment simulation device embodiments provided below can refer to the limitations of the radio astronomy electromagnetic environment simulation and construction method above, and will not be repeated here.

[0162] In an exemplary embodiment, Fig.17 As shown, Fig.171704 is a structural block diagram of a radio astronomy electromagnetic environment simulation and construction device in an embodiment; the radio astronomy electromagnetic environment simulation and construction device includes: an acquisition module 1701, a simulation mode determination module 1702, a radio astronomy signal determination module 1703, a radio frequency interference signal acquisition module 1704, a processing module 1705 and an electromagnetic environment construction module 1706; The acquisition module 1701 is used to acquire electromagnetic environment simulation parameters and a target environment simulation mode; the target environment simulation mode includes at least any one of a plurality of environment simulation modes; The simulation mode determination module 1702 is used to determine the target simulation mode corresponding to the target environment simulation mode according to a preset corresponding relationship; the preset corresponding relationship includes the corresponding relationship between the environment simulation mode and the simulation mode; The radio astronomy signal determination module 1703 is used to perform simulation according to a target simulation mode based on electromagnetic environment simulation parameters to determine a target radio astronomy signal corresponding to a target environment simulation mode; The radio frequency interference signal acquisition module 1704 is used to acquire the target radio frequency interference signal determined according to the electromagnetic environment simulation parameters; The processing module 1705 is used to perform superposition processing on the target radio astronomy signal and the target radio frequency interference signal to obtain a target environment simulation signal; The electromagnetic environment construction module 1706 is used to construct the radio astronomy electromagnetic environment according to the target environment simulation signal.

[0163] The above-mentioned radio astronomy electromagnetic environment simulation device can ensure the basic consistency between the generated target environment simulation signal and the actually observed radio astronomy signal by obtaining the electromagnetic environment simulation parameters and the target environment simulation mode; further, according to the preset corresponding relationship, the target simulation mode corresponding to the target environment simulation mode is determined; based on the electromagnetic environment simulation parameters, the simulation is performed according to the target simulation mode to determine the target radio astronomy signal corresponding to the target environment simulation mode; based on the preset corresponding relationship, the most suitable simulation mode can be automatically selected according to different target environment simulation modes to generate the corresponding target radio astronomy signal, which lays a foundation for enhancing the flexibility and adaptability of radio astronomy electromagnetic environment simulation. ; Furthermore, by obtaining the target radio frequency interference signal determined according to the electromagnetic environment simulation parameters, and superimposing the target radio astronomy signal and the target radio frequency interference signal, the target environment simulation signal is obtained, which can ensure that the target environment simulation signal is closer to the actual situation, and improve the accuracy and authenticity of the target environment simulation signal; according to the target environment simulation signal, the radio astronomy electromagnetic environment is constructed, and a high degree of restoration of the complex radio astronomy electromagnetic environment is achieved, avoiding the problem in the prior art that the specified type of radio astronomy signal cannot be simulated, resulting in low flexibility in the simulation and construction of the radio astronomy electromagnetic environment, and improving the flexibility and adaptability of the simulation and construction of the radio astronomy electromagnetic environment.

[0164] In one embodiment, the electromagnetic environment simulation parameters include simulation center frequency, sampling frequency, simulation duration, radio astronomy signal simulation parameters, and radio frequency interference simulation parameters; the environment simulation mode includes fast radio burst electromagnetic environment simulation mode, neutral hydrogen electromagnetic environment simulation mode, and pulsar electromagnetic environment simulation mode; the radio astronomy signal determination module 1703 is also used to When the target environment simulation mode is a fast radio burst electromagnetic environment simulation mode, based on the electromagnetic environment simulation parameters, simulation is performed in accordance with the fast radio burst signal simulation mode to obtain a target fast radio burst signal; When the target environment simulation mode is a neutral hydrogen electromagnetic environment simulation mode, simulation is performed according to a neutral hydrogen signal simulation mode based on electromagnetic environment simulation parameters to obtain a target neutral hydrogen signal; When the target environment simulation mode is the pulsar electromagnetic environment simulation mode, the simulation is performed in accordance with the pulsar signal simulation method based on the electromagnetic environment simulation parameters to obtain the target pulsar signal.

[0165] In one embodiment, the radio astronomy signal determination module 1703 is further configured to: Acquire first simulation parameters corresponding to the fast radio burst signal; the first simulation parameters include signal center frequency, bandwidth, pulse half-width, and dispersion; Generate a first pulse envelope and a first baseband signal according to the first simulation parameter; Generate a first intermediate signal according to the first pulse envelope and the first baseband signal; Performing dispersion simulation on the first intermediate signal to obtain an initial fast radio burst signal; According to the electromagnetic environment simulation parameters, the initial fast radio burst signal is noise-processed to obtain the target fast radio burst signal.

[0166] In one embodiment, the radio astronomy signal determination module 1703 is further configured to: Acquire a simulation type and a second simulation parameter corresponding to the neutral hydrogen signal; the second simulation parameter includes a Doppler velocity and a relative acceleration; When the simulation type is a neutral hydrogen emission line signal, generating a neutral hydrogen emission line signal according to a second simulation parameter; When the simulation type is a neutral hydrogen absorption line signal, determining a target filter according to a simulation center frequency, a second simulation parameter, and a preset filter parameter; Obtain Gaussian white noise, and use the Gaussian white noise as the target background noise; The target background noise is filtered through the target filter to obtain the neutral hydrogen absorption line signal; According to the electromagnetic environment simulation parameters, the neutral hydrogen emission line signal or the neutral hydrogen absorption line signal is subjected to noise processing to obtain the target neutral hydrogen signal.

[0167] In one embodiment, the preset filter parameters include a stopband attenuation value; the radio astronomy signal determination module 1703 is also used to According to the simulation center frequency and the second simulation parameter, the relative frequency position of neutral hydrogen is obtained; the relative frequency position of neutral hydrogen includes the signal start frequency and the signal cutoff frequency; Generate stopband frequency and passband frequency according to the signal start frequency and signal cutoff frequency; The target filter is determined according to the stopband frequency, the passband frequency and the stopband attenuation value; the target filter is a high-pass filter.

[0168] In one embodiment, the radio astronomy signal determination module 1703 is further configured to: Obtaining a third simulation parameter corresponding to the pulsar signal; Generate a second pulse envelope and a second baseband signal according to the third simulation parameter; the second pulse envelope includes a single-peak pulse, a multi-peak pulse, a micro-pulse and a giant pulse; Generate a second intermediate signal according to the second pulse envelope and the second baseband signal; Performing dispersion simulation on the second intermediate signal to obtain an initial pulsar signal; According to the electromagnetic environment simulation parameters, the initial pulsar signal is noise-processed to obtain the target pulsar signal.

[0169] In one embodiment, the electromagnetic environment simulation parameters include simulation center frequency, sampling frequency, simulation duration, radio astronomy signal simulation parameters, and radio frequency interference simulation parameters; the target radio frequency interference signal includes a broadband radio frequency interference signal; the radio frequency interference signal acquisition module 1704 is also used to Obtaining a fourth simulation parameter corresponding to the broadband radio frequency interference signal; generating a third pulse envelope and a third baseband signal according to the fourth simulation parameter; Generate single carrier pulse interference according to the simulation center frequency, the first target parameter in the fourth simulation parameter and the third pulse envelope; the first target parameter includes the pulse center frequency and the pulse half-height full width; Generate random noise pulse interference according to the simulation center frequency, the second target parameter in the fourth simulation parameter, the third pulse envelope and the third baseband signal; the second target parameter includes bandwidth and pulse half-height full width; Generate linear frequency modulation pulse interference according to the simulation center frequency, the third target parameter in the fourth simulation parameter and the third pulse envelope; the third target parameter includes the pulse center frequency, bandwidth and pulse half-height full width; According to the electromagnetic environment simulation parameters, the target radio frequency interference signal is determined from single carrier pulses, random noise pulses and linear frequency modulation pulses.

[0170] In one embodiment, the electromagnetic environment building module 1706 is also used to Performing fixed-point quantization processing on the target environment simulation signal to obtain a quantized environment simulation signal; Transmitting the quantized environment simulation signal to the target software radio transmitting platform; The radio astronomy electromagnetic environment is constructed based on the target software radio transmission platform and the quantized environmental simulation signal.

[0171] Each module in the above-mentioned radio astronomy electromagnetic environment simulation device can be implemented in whole or in part by software, hardware and their combination. Each of the above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0172] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Fig.18As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data related to the simulation and construction of the radio astronomy electromagnetic environment. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for simulating and constructing the radio astronomy electromagnetic environment is implemented.

[0173] Those skilled in the art will understand that Fig.18 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0174] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

[0175] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0176] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0177] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0178] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0179] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for simulating and constructing a radio astronomy electromagnetic environment, characterized in that: Applied to a radio astronomy electromagnetic environment simulation system, the method comprises: Acquire electromagnetic environment simulation parameters and a target environment simulation mode; the target environment simulation mode includes at least any one of a plurality of environment simulation modes; Determine a target simulation mode corresponding to the target environment simulation mode according to a preset corresponding relationship; the preset corresponding relationship includes a corresponding relationship between the environment simulation mode and the simulation mode; Based on the electromagnetic environment simulation parameters, simulation is performed according to the target simulation mode to determine a target radio astronomy signal corresponding to the target environment simulation mode; Acquire a target radio frequency interference signal determined according to the electromagnetic environment simulation parameters; Performing superposition processing on the target radio astronomy signal and the target radio frequency interference signal to obtain a target environment simulation signal; A radio astronomy electromagnetic environment is constructed according to the target environment simulation signal.

2. The method according to claim 1, characterized in that The electromagnetic environment simulation parameters include simulation center frequency, sampling frequency, simulation duration, radio astronomy signal simulation parameters, and radio frequency interference simulation parameters; the environment simulation mode includes fast radio burst electromagnetic environment simulation mode, neutral hydrogen electromagnetic environment simulation mode, and pulsar electromagnetic environment simulation mode; the simulation based on the electromagnetic environment simulation parameters and in accordance with the target simulation mode to determine the target radio astronomy signal corresponding to the target environment simulation mode includes: When the target environment simulation mode is a fast radio burst electromagnetic environment simulation mode, based on the electromagnetic environment simulation parameters, simulation is performed in accordance with a fast radio burst signal simulation mode to obtain a target fast radio burst signal; When the target environment simulation mode is a neutral hydrogen electromagnetic environment simulation mode, based on the electromagnetic environment simulation parameters, simulation is performed in a neutral hydrogen signal simulation mode to obtain a target neutral hydrogen signal; When the target environment simulation mode is a pulsar electromagnetic environment simulation mode, simulation is performed in a pulsar signal simulation manner based on the electromagnetic environment simulation parameters to obtain a target pulsar signal.

3. The method according to claim 2, characterized in that The method of simulating a target fast radio burst signal based on the electromagnetic environment simulation parameters and simulating in a fast radio burst signal simulation manner includes: Acquire first simulation parameters corresponding to the fast radio burst signal; the first simulation parameters include signal center frequency, bandwidth, pulse half-width, and dispersion; Generate a first pulse envelope and a first baseband signal according to the first simulation parameter; Generate a first intermediate signal according to the first pulse envelope and the first baseband signal; Performing dispersion simulation on the first intermediate signal to obtain an initial fast radio burst signal; The initial fast radio burst signal is subjected to noise addition processing according to the electromagnetic environment simulation parameters to obtain a target fast radio burst signal.

4. The method according to claim 2, characterized in that: The step of simulating according to a neutral hydrogen signal simulation method based on the electromagnetic environment simulation parameters to obtain a target neutral hydrogen signal includes: Acquire a simulation type and a second simulation parameter corresponding to the neutral hydrogen signal; the second simulation parameter includes a Doppler velocity and a relative acceleration; When the simulation type is a neutral hydrogen emission line signal, generating a neutral hydrogen emission line signal according to the second simulation parameter; In the case where the simulation type is a neutral hydrogen absorption line signal, determining a target filter according to the simulation center frequency, the second simulation parameter and a preset filter parameter; Obtaining Gaussian white noise, and using the Gaussian white noise as target background noise; The target background noise is filtered by the target filter to obtain a neutral hydrogen absorption line signal; According to the electromagnetic environment simulation parameters, the neutral hydrogen emission line signal or the neutral hydrogen absorption line signal is subjected to noise processing to obtain a target neutral hydrogen signal.

5. The method according to claim 4, characterized in that The preset filter parameters include a stopband attenuation value; and determining a target filter according to the simulation center frequency, the second simulation parameter and the preset filter parameters includes: According to the simulation center frequency and the second simulation parameter, a relative frequency position of neutral hydrogen is obtained; the relative frequency position of neutral hydrogen includes a signal start frequency and a signal cutoff frequency; Generate a stopband frequency and a passband frequency according to the signal start frequency and the signal cutoff frequency; A target filter is determined according to the stopband frequency, the passband frequency and the stopband attenuation value; the target filter is a high-pass filter.

6. The method according to claim 2, characterized in that The step of simulating according to a pulsar signal simulation method based on the electromagnetic environment simulation parameters to obtain a target pulsar signal includes: Obtaining a third simulation parameter corresponding to the pulsar signal; Generate a second pulse envelope and a second baseband signal according to the third simulation parameter; the second pulse envelope includes a single-peak pulse, a multi-peak pulse, a micro-pulse and a giant pulse; generating a second intermediate signal according to the second pulse envelope and the second baseband signal; Performing dispersion simulation on the second intermediate signal to obtain an initial pulsar signal; According to the electromagnetic environment simulation parameters, the initial pulsar signal is subjected to noise processing to obtain a target pulsar signal.

7. The method according to claim 1, characterized in that The electromagnetic environment simulation parameters include simulation center frequency, sampling frequency, simulation duration, radio astronomy signal simulation parameters and radio frequency interference simulation parameters; The target radio frequency interference signal includes a broadband radio frequency interference signal; The obtaining of a target radio frequency interference signal determined according to the electromagnetic environment simulation parameter comprises: Obtaining a fourth simulation parameter corresponding to the broadband radio frequency interference signal; generating a third pulse envelope and a third baseband signal according to the fourth simulation parameter; Generate single carrier pulse interference according to the simulation center frequency, the first target parameter in the fourth simulation parameter and the third pulse envelope; the first target parameter includes the pulse center frequency and the pulse half-height full width; Generate random noise pulse interference according to the simulation center frequency, the second target parameter in the fourth simulation parameter, the third pulse envelope and the third baseband signal; the second target parameter includes bandwidth and pulse half-height full width; Generate linear frequency modulation pulse interference according to the simulation center frequency, the third target parameter in the fourth simulation parameter and the third pulse envelope; the third target parameter includes the pulse center frequency, bandwidth and pulse half-maximum full width; According to the electromagnetic environment simulation parameters, a target radio frequency interference signal is determined from the single carrier pulse interference, the random noise pulse interference and the linear frequency modulation pulse interference.

8. The method according to claim 1, characterized in that: The step of constructing a radio astronomy electromagnetic environment according to the target environment simulation signal includes: Performing fixed-point quantization processing on the target environment simulation signal to obtain a quantized environment simulation signal; Transmitting the quantized environment simulation signal to a target software radio transmission platform; Based on the target software radio transmission platform and the quantized environment simulation signal, a radio astronomy electromagnetic environment is constructed.

9. A radio astronomy electromagnetic environment simulation system, characterized in that: The system comprises a radio astronomy electromagnetic environment simulation platform and a target software radio transmission platform; the radio astronomy electromagnetic environment simulation platform is communicatively connected with the target software radio transmission platform; The radio astronomy electromagnetic environment simulation platform is used to obtain electromagnetic environment simulation parameters and a target environment simulation mode; the target environment simulation mode includes at least any one of a plurality of environment simulation modes; according to a preset corresponding relationship, a target simulation mode corresponding to the target environment simulation mode is determined; the preset corresponding relationship includes a corresponding relationship between an environment simulation mode and a simulation mode; Based on the electromagnetic environment simulation parameters, simulation is performed according to the target simulation mode to determine a target radio astronomy signal corresponding to the target environment simulation mode; Acquire a target radio frequency interference signal determined according to the electromagnetic environment simulation parameters; Performing superposition processing on the target radio astronomy signal and the target radio frequency interference signal to obtain a target environment simulation signal; The target software radio transmission platform is used to construct a radio astronomy electromagnetic environment according to the target environment simulation signal.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 8 are implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

12. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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