CN115267373A - Radiation source dynamic scene simulation method and device based on vector signal generation device - Google Patents
Radiation source dynamic scene simulation method and device based on vector signal generation device Download PDFInfo
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Abstract
The invention belongs to the technical field of electromagnetic simulation, and relates to a radiation source dynamic scene simulation method and a radiation source dynamic scene simulation device based on a vector signal generation device, wherein the method comprises the following steps: building an electromagnetic simulation test system; generating a waveform file containing a baseband signal, and transmitting the waveform file to a vector signal source; loading a waveform file by a vector signal source; setting initial signal parameters of a vector signal source; performing scene calculation by using the motion trail parameters of the radiation source in the dynamic scene to determine the position parameters, the direction parameters and the speed parameters of the radiation source; resolving and determining PDW data flow of a radiation source through radiation source pulses, and extracting real-time control parameters; adjusting the amplitude, phase and frequency of the initial signal of the vector signal source according to the real-time control beat to obtain a radio frequency signal at the current moment; and injecting the radio frequency signal at the current moment into the receiver to be tested. The invention realizes the real-time adjustment of the amplitude, frequency and phase of the radio frequency signal; and the characteristics of the output coherent signals are ensured through the hardware synchronization of the multi-vector signal source.
Description
Technical Field
The invention belongs to the technical field of electromagnetic simulation, and particularly relates to a radiation source dynamic scene simulation method and device based on a vector signal generation device.
Background
The construction of complex electromagnetic environment is always an important subject in the field of military industry testing. In order to verify and test various performances of electronic equipment in a real electromagnetic environment, a test system in a complex electromagnetic environment is established in the prior art by adopting signal simulation software to generate complex signals and adopting a mode of a signal source to simulate the complex signals and output radio frequency signals to be injected into the electronic equipment.
In the prior art, for a scene of a static radiation source, a vector signal source or an agile signal source can be used for generating a radio frequency signal; for a dynamic radiation source scene, due to the relative motion of a radiation source, the amplitude, the frequency and the phase of a signal at a receiving end can be subjected to agility, only an expensive agility signal source can be used for simulation, and a simulation signal source cannot simulate a coherent signal.
Disclosure of Invention
In order to solve the technical problems, the invention provides a radiation source dynamic scene simulation method and a radiation source dynamic scene simulation device based on a vector signal generation device.
In a first aspect, the invention discloses a radiation source dynamic scene simulation method based on a vector signal generation device, which comprises the following steps:
an electromagnetic simulation test system is built in a local area network, and phase-coherent signal calibration is carried out; the electromagnetic simulation test system comprises radiation source signal simulation equipment and a vector signal source;
the radiation source signal simulation equipment generates a waveform file containing a baseband signal and transmits the waveform file to the vector signal source;
the vector signal source loads the waveform file to generate a baseband signal;
the radiation source signal simulation equipment sets initial signal parameters of the vector signal source;
the radiation source signal simulation equipment utilizes the motion trail parameters of a radiation source in a dynamic scene to carry out scene calculation, and determines the position parameters, the direction parameters and the speed parameters of the radiation source;
the radiation source signal simulation equipment determines a PDW data stream of the radiation source through radiation source pulse calculation according to the position parameter, the direction parameter and the speed parameter of the radiation source in a dynamic scene, and extracts a real-time control parameter from the PDW data stream;
the radiation source signal simulation equipment adjusts the amplitude, phase and frequency parameters of the radio frequency signal of the vector signal source according to the real-time control parameters and the real-time control beat to obtain the radio frequency signal at the current moment;
and the vector signal source injects the radio frequency signal at the current moment into the receiver to be tested.
In a second aspect, the invention discloses a radiation source dynamic scene simulation device based on a vector signal generation device, which comprises radiation source signal simulation equipment and a vector signal source; the radiation source signal simulation equipment comprises a scene parameter generation module, a baseband signal generation module, a real-time parameter generation module and a real-time parameter control module;
the scene parameter generation module is used for performing scene calculation by utilizing the motion trail parameters of the radiation source in the dynamic scene to determine the position parameters, the direction parameters and the speed parameters of the radiation source;
the baseband signal generation module is used for generating a waveform file of a baseband signal supported by a vector signal source according to a signal pattern in the dynamic scene and transmitting the waveform file to the vector signal source;
the radiation source signal simulation equipment sets initial signal parameters;
the real-time parameter generation module is used for resolving and determining a PDW data stream of the radiation source through radiation source pulses according to the position parameter, the direction parameter and the speed parameter of the radiation source in a dynamic scene and extracting real-time control parameters from the PDW data stream;
the real-time parameter control module is used for adjusting the amplitude, the phase and the frequency of the vector signal source to the initial signal according to the real-time control parameters and the real-time control beat to obtain the radio-frequency signal;
and the vector signal source is used for loading the waveform file and injecting the radio frequency signal at the current moment generated after adjustment into a receiver to be tested.
The invention has the beneficial effects that: the method determines the position parameter, the direction parameter and the speed parameter of a radiation source through dynamic scene calculation; the method comprises the steps of resolving and determining PDW data flow of a radiation source through radiation source pulses, extracting real-time control parameters from the PDW data flow, and realizing real-time adjustment of the amplitude, the frequency and the phase of a radio-frequency signal; and the characteristics of the output coherent signals are ensured through the hardware synchronization of the multi-vector signal source.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the radiation source signal simulation device performs scene calculation by using motion trajectory parameters of a radiation source in a dynamic scene, and includes:
setting a time step length, slicing the scene into a plurality of time slices, and acquiring the starting time of each time slice;
determining the instantaneous position, attitude, speed and acceleration of the motion platform: calculating the position, the motion attitude, the speed and the acceleration of each motion platform at the starting moment of each time slice;
determining the instantaneous position and antenna pointing direction of the radiation source: calculating the absolute coordinates of the radiation source transmitting antenna at the starting moment of each time slice; calculating the direction of the radiation source antenna at each scene slice moment according to the initial direction and the scanning parameters of the radiation source antenna; simultaneously taking the speed of the motion platform as the instantaneous speed of the radiation source;
determining the instantaneous position and antenna pointing direction of the receiver under test: calculating absolute coordinates of each receiving antenna of the receiver to be tested at the starting moment of the time slice by combining the installation position of each receiving antenna of the receiver to be tested according to the time slice data; calculating the instantaneous direction of each receiving antenna of the receiver to be tested at each scene slice moment by combining the initial direction of the antenna of the receiver to be tested and the scanning parameters; and simultaneously taking the speed of the motion platform as the instantaneous speed of the tested receiver.
The method has the advantages that scene calculation of the pulse parameters of the radiation source in the dynamic scene is achieved through scene splitting, instantaneous position, attitude, speed and acceleration calculation of the moving platform, instantaneous position and antenna pointing calculation of the radiation source and instantaneous position and antenna pointing calculation of the measured receiver.
Further, the PDW data stream of the radiation source is determined by radiation source pulse resolution, comprising:
calculating the relative distance between the transmitter antenna of each radiation source and the antenna port of the receiver to be tested, the orientation between each receiver antenna to be tested and the radiation source, and the orientation between the transmitter antenna of each radiation source and the receiver antenna to be tested according to the position parameters, the direction parameters and the speed parameters of the radiation sources;
radiation source PDW calculation: calculating the starting time, frequency, power, pulse width and intra-pulse modulation parameters of each pulse of the radiation source pulse by pulse according to the position parameter, the direction parameter and the speed parameter of the radiation source to form output PDW list data of each radiation source;
calculating the phase scanning characteristic of the radiation source antenna: according to the moment when each radiation source emits the PDW and by combining the phase scanning characteristic parameters of the radiation sources, calculating the instantaneous phase scanning angle of the PDW of the radiation sources pulse by pulse;
and (3) calculating the PDW of the antenna end face of the measured receiver: respectively calculating the correction amounts of time delay, amplitude, phase and frequency shift of the PDW of each receiver end face by taking the PDW as input and combining the distance, the direction and the radial speed between the receiving antenna and the transmitting antenna, and forming PDW data of each receiving end face by combining PDW data of the radiation source;
and calculating the time, amplitude, phase and Doppler frequency shift of each port of the receiver to be tested for receiving the radio frequency signal, and determining the PDW data stream corresponding to the radio frequency signal received by each port.
The method has the advantages that radiation source pulse calculation is realized through calculation of the relative distance and the orientation between the radiation source and the receiver, calculation of the PDW of the radiation source, calculation of the phase scanning characteristic of the radiation source antenna and calculation of the PDW of the end face of the measured receiver antenna, and the purpose of determining the PDW data stream of the radiation source is achieved.
Further, determining the PDW data stream of the radiation source further includes converting the PDW data stream into IQ data and storing as waveform data.
The method has the advantages that the PDW data stream is converted into IQ data and stored as waveform data, and the pulse data is loaded and played by the vector signal source.
Further, the method for extracting the real-time control parameters comprises the following steps:
sequencing the pulse sequences received by the receiver to be tested according to the arrival time of the pulse sequences at the receiver to be tested, setting a real-time control interval according to the vector signal source, and extracting amplitude, phase and frequency information from the arriving pulse sequences from the initial moment when the pulse sequences arrive at the receiver to be tested until the pulse sequences arrive at the receiver to be tested.
The further scheme has the advantages that the pulse sequence can accurately describe the pulse signals received by the receiving port of the receiver to be tested, wherein amplitude, frequency and phase information can represent accurate results after amplitude, frequency and phase changes caused by factors such as motion, doppler frequency shift and antenna phase sweep between the motion platform where the radiation source is located and the motion platform where the receiver to be tested is located.
Further, adjusting the amplitude, phase and frequency parameters of the radio frequency signal of the vector signal source comprises: and adjusting the amplitude and the frequency of the radio-frequency signal of the vector signal source into the amplitude and the frequency of the radio-frequency signal of the vector signal source, and adjusting the phase of the radio-frequency signal of the vector signal source into the baseband phase of the vector signal source.
The method has the advantages that the amplitude and the frequency of the vector signal source are adjusted by adjusting the radio frequency part of the vector signal source, and the phase of the vector signal source is adjusted by adjusting the baseband phase of the vector signal source.
Further, the vector signal source comprises a main signal source and a plurality of slave signal sources; the local oscillation signal output end, the reference signal output end and the synchronization and trigger signal output end of the master signal source are connected to the local oscillation signal input end, the reference signal input end and the synchronization and trigger signal input end of one slave signal source; and the local oscillation signal output end, the reference signal output end and the synchronization and trigger signal output end of the former slave signal source are connected to the local oscillation signal input end, the reference signal input end and the synchronization and trigger signal input end of the latter slave signal source among the slave signal sources.
The method has the advantages that the local oscillator output, the reference signal output, the synchronization and the trigger signal output of the main signal source are connected to the local oscillator input, the reference signal input, the synchronization and the trigger signal input of the slave signal sources, and the slave signal sources are connected in series, so that the signal synchronization of a plurality of vector signal sources is realized.
Drawings
Fig. 1 is a flowchart of a radiation source dynamic scene simulation method based on a vector signal generation device according to embodiment 1 of the present invention;
FIG. 2 is a diagram illustrating a real-time parameter generation method according to embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of IQ data according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a radiation source dynamic scene simulation apparatus based on a vector signal generation apparatus in embodiment 2 of the present invention;
fig. 5 is a schematic diagram of a vector signal source in embodiment 2 of the present invention.
Icon: u1-a main signal source; u2, U3, U4-slave signal sources.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example 1
As an embodiment, as shown in fig. 1, to solve the technical problem that an analog signal source cannot simulate a coherent signal, the embodiment provides a radiation source dynamic scene simulation method based on a vector signal generating device, including the steps of:
an electromagnetic simulation test system is built in a local area network, and phase-coherent signal calibration is carried out; the electromagnetic simulation test system comprises radiation source signal simulation equipment and a vector signal source;
the radiation source signal simulation equipment generates a waveform file containing a baseband signal and transmits the waveform file to a vector signal source;
loading a waveform file by a vector signal source to generate a baseband signal;
setting initial signal parameters of a vector signal source by radiation source signal simulation equipment;
the radiation source signal simulation equipment utilizes the motion trail parameters of the radiation source in the dynamic scene to carry out scene calculation and determine the position parameters, the direction parameters and the speed parameters of the radiation source;
the radiation source signal simulation equipment determines the PDW data flow of the radiation source through radiation source pulse calculation according to the position parameter, the direction parameter and the speed parameter of the radiation source in the dynamic scene, and extracts the real-time control parameter from the PDW data flow;
the radiation source signal simulation equipment adjusts the amplitude, phase and frequency parameters of the radio frequency signal of the vector signal source according to the real-time control parameters and the real-time control beat to obtain the radio frequency signal;
and the vector signal source injects the radio frequency signal at the current moment into the receiver to be tested.
The method determines the position parameter, the direction parameter and the speed parameter of a radiation source through dynamic scene calculation; resolving and determining PDW data flow of the radiation source through radiation source pulses, and extracting real-time control parameters from the PDW data flow to realize real-time adjustment of amplitude, frequency and phase of the radio-frequency signal; and the characteristics of the output coherent signals are ensured through the hardware synchronization of the multi-vector signal source.
Optionally, the radiation source signal simulation device performs scene calculation by using a motion trajectory parameter of a radiation source in a dynamic scene, including:
setting time step length, slicing the scene into a plurality of time slices, and acquiring the starting time of each time slice;
determining the instantaneous position, attitude, velocity and acceleration of the moving platform: calculating the position, the motion attitude, the speed and the acceleration of each motion platform at the starting moment of each time slice;
determining the instantaneous position of the radiation source and the antenna pointing direction: calculating absolute coordinates of the radiation source transmitting antenna at the starting moment of each time slice; calculating the direction of the radiation source antenna at each scene slice moment according to the initial direction and the scanning parameters of the radiation source antenna; simultaneously, taking the speed of the moving platform as the instantaneous speed of the radiation source; wherein, the absolute coordinate of the radiation source transmitting antenna is based on a geocentric coordinate system;
determining the instantaneous position and antenna orientation of the receiver under test: calculating absolute coordinates of each receiving antenna of the receiver to be tested at the starting moment of time slicing by combining the installation position of each receiving antenna of the receiver to be tested according to the time slicing data; calculating the instantaneous direction of each receiving antenna of the receiver to be tested at each scene slice moment by combining the initial direction of the antenna of the receiver to be tested and the scanning parameters; and simultaneously, taking the speed of the moving platform as the instantaneous speed of the measured receiver.
In the practical application process, the output of the scene calculation is parameters such as a radiation source at the scene slice starting moment, the direction position of the receiver to be detected, the antenna direction, the speed, the position of each receiver antenna to be detected, the antenna direction, the speed vector and the like. Scene calculation of pulse parameters of the radiation source in the dynamic scene is realized through scene splitting, instantaneous position, attitude, speed and acceleration calculation of the motion platform, instantaneous position and antenna pointing calculation of the radiation source and instantaneous position and antenna pointing calculation of the measured receiver.
Optionally, the determining PDW data stream of the radiation source by radiation source pulse solution includes:
calculating the relative distance between the transmitter antenna of each radiation source and the antenna port of the measured receiver, the orientation between the antenna of each measured receiver and the radiation source, and the orientation between the transmitter antenna of each radiation source and the antenna of the measured receiver according to the position parameters, the direction parameters and the speed parameters of the radiation sources;
radiation source PDW calculation: calculating the starting time, frequency, power, pulse width and intra-pulse modulation parameters of each pulse of the radiation source pulse by pulse according to the position parameter, the direction parameter and the speed parameter of the radiation source to form output PDW list data of each radiation source;
and (3) calculating the phase scanning characteristic of the radiation source antenna: according to the moment when each radiation source emits the PDW, the instantaneous phase scanning angle of the PDW of the radiation source is calculated pulse by combining the phase scanning characteristic parameters of the radiation source;
PDW calculation of the antenna end face of the measured receiver: respectively calculating the correction quantity of the PDW of each receiver end face by taking a radiation source PDW as input and combining the distance, the direction and the radial speed between the receiving antenna and the transmitting antenna, wherein the correction quantity comprises time delay, amplitude, phase and frequency shift, and forming PDW data of each receiving end face by combining radiation source PDW data;
and calculating the time, amplitude, phase and Doppler frequency shift of the radio frequency signal received by each port of the tested receiver, and determining the PDW data stream corresponding to the radio frequency signal received by each port.
In the practical application process, radiation source pulse calculation is realized through the calculation of the relative distance and the orientation between a radiation source and a receiver, the calculation of a radiation source PDW, the calculation of the antenna phase scanning characteristic of the radiation source and the calculation of the PDW of the end face of the measured receiver antenna, and the purpose of determining the PDW data stream of the radiation source is achieved.
Optionally, determining the PDW data stream of the radiation source further comprises converting the PDW data stream into IQ data and storing as waveform data.
In the practical application process, the PDW data stream is converted into IQ data and stored as waveform data, and the pulse data is loaded and played by a vector signal source.
PDW, i.e. the pulse description word (pulse parameter), is given as a function P (t) over time t, a (t) being the amplitude, f being the frequency, Φ (t) being the phase, PDW being expressed as:
P(t)＝A(t)*cos[2πft+Φ(t)]；
after the PDW pulse waveform is obtained, IQ data are finally obtained through frequency conversion and frequency modulation, as shown in figure 3, the horizontal axis is time t, and the vertical axis is amplitude level; q1 is I-path data; q2 is Q-way data.
Optionally, the method for extracting the real-time control parameter includes:
sequencing the pulse sequences received by the receiver to be tested according to the arrival time of the pulse sequences at the receiver to be tested, setting a real-time control interval according to a vector signal source, and extracting amplitude, phase and frequency information from the arriving pulse sequences from the initial moment when the pulse sequences arrive at the receiver to be tested until the pulse sequences arrive at the receiver to be tested.
In the practical application process, the real-time parameter generation method comprises the following steps: sequencing the pulse sequences received by the receiver to be tested according to the TOA (arrival time), setting a real-time control interval delta t according to the performance of a vector signal source, and extracting amplitude, phase and frequency information from the arrived pulse sequences from the time t0 until the pulse is finished, wherein all the pulse sequences arrive at the receiver to be tested. As shown in fig. 2, the horizontal axis represents the arrival time TOA of the pulse sequence, and the vertical axis represents the adjustment amplitude a (t), phase Φ (t), and frequency f at time points t0, t1, t2 \8230 \ 8230, tn.
The pulse sequence can accurately describe the pulse signal received by the receiving port of the receiver to be tested, wherein the amplitude, frequency and phase information can represent the accurate result after the amplitude, frequency and phase change between the moving platform where the radiation source is located and the moving platform where the receiver to be tested is located due to factors such as motion, doppler frequency shift and antenna phase sweep.
Optionally, adjusting the amplitude, the phase, and the frequency parameters of the radio frequency signal of the vector signal source includes: the amplitude and the frequency of the radio-frequency signal of the vector signal source are adjusted to be the amplitude and the frequency of the radio-frequency signal of the vector signal source, and the phase of the radio-frequency signal of the vector signal source is adjusted to be the baseband phase of the vector signal source.
In the practical application process, the amplitude and the frequency of the vector signal source are adjusted by adjusting the radio frequency part of the vector signal source, and the phase of the vector signal source is adjusted by adjusting the baseband phase of the vector signal source.
Example 2
Based on the same principle as the method shown in embodiment 1 of the present invention, a radiation source dynamic scene simulation apparatus based on a vector signal generation apparatus is also provided in the embodiment of the present invention, as shown in fig. 4, the apparatus includes a radiation source signal simulation device and a vector signal source; the radiation source signal simulation equipment comprises a scene parameter generation module, a baseband signal generation module, a real-time parameter generation module and a real-time parameter control module;
the scene parameter generation module is used for carrying out scene calculation by utilizing the motion trail parameters of the radiation source in the dynamic scene and determining the position parameters, the direction parameters and the speed parameters of the radiation source;
the baseband signal generation module is used for generating a waveform file of the baseband signal supported by the vector signal source according to the signal pattern in the dynamic scene and transmitting the waveform file to the vector signal source;
setting initial signal parameters by radiation source signal simulation equipment;
the real-time parameter generation module is used for resolving and determining a PDW data stream of the radiation source through radiation source pulses according to the position parameter, the direction parameter and the speed parameter of the radiation source in the dynamic scene and extracting real-time control parameters from the PDW data stream;
the real-time parameter control module is used for adjusting the amplitude, the phase and the frequency of the initial signal of the vector signal source according to the real-time control parameters and the real-time control beat to obtain a radio frequency signal at the current moment;
and the vector signal source is used for loading the waveform file to generate a baseband signal and injecting the radio frequency signal at the current moment generated after adjustment into the receiver to be tested.
The beneficial effects of the invention are: the method obtains signal parameter data received by a receiver to be tested through dynamic scene deduction and radiation source signal calculation, converts the signal parameter data into IQ data and real-time control parameters, and realizes real-time adjustment of the amplitude, the frequency and the phase of a radio frequency signal; and the characteristics of the output coherent signals are ensured through hardware synchronization of the multi-vector signal source.
Optionally, the vector signal source includes a master signal source and a plurality of slave signal sources; the local oscillation signal output end, the reference signal output end and the synchronization and trigger signal output end of the master signal source are connected to the local oscillation signal input end, the reference signal input end and the synchronization and trigger signal input end of a slave signal source; and the local oscillation signal output end, the reference signal output end and the synchronization and trigger signal output end of the former slave signal source are connected to the local oscillation signal input end, the reference signal input end and the synchronization and trigger signal input end of the latter slave signal source among the slave signal sources.
IN practical application, as shown IN fig. 5, U1 is a master signal source, U2, U3, and U4 are slave signal sources, LO OUT is a local oscillator signal output terminal, LO IN is a local oscillator signal input terminal, REF OUT is a reference signal output terminal, REF IN is a reference signal input terminal, CLK OUT is an external clock output terminal, CLK IN is an external clock input terminal, and RF is a radio frequency signal output terminal. By setting the main signal source and the slave signal source to be synchronous, the slave signal source can synchronously play only by playing the main signal source signal, the main signal source signal is stopped, the slave signal source is also stopped, and the main signal source provides a local oscillation synchronous signal and trigger. The local oscillator output, the reference signal output, the synchronization and the trigger signal output of the main signal source are connected to the local oscillator input, the reference signal input, the synchronization and the trigger signal input of the slave signal sources, and the slave signal sources are connected in series, so that the signal synchronization of a plurality of vector signal sources is realized.
Optionally, the scene parameter generating module includes a scene splitting unit, a first processing unit, a second processing unit, and a third processing unit;
the scene splitting unit is used for splitting a scene, slicing the scene into a plurality of time slices by setting a time step length and acquiring the starting time of each time slice;
a first processing unit for determining the instantaneous position, attitude, velocity and acceleration of the moving platform: calculating the position, the motion attitude, the speed and the acceleration of each motion platform at the starting moment of each time slice;
a second processing unit for determining the instantaneous position of the radiation source and the antenna pointing direction: calculating the absolute coordinates of the radiation source transmitting antenna at the starting moment of each time slice; calculating the direction of the radiation source antenna at each scene slice moment according to the initial direction and the scanning parameters of the radiation source antenna; simultaneously, taking the speed of the moving platform as the instantaneous speed of the radiation source;
a third processing unit for determining the instantaneous position and antenna orientation of the measured receiver antenna: calculating absolute coordinates of each receiving antenna of the receiver to be tested at the time slice starting moment according to the time slice data and the installation position of each receiving antenna of the receiver to be tested; combining the initial direction of the antenna of the receiver to be tested with the machine scanning parameters, and calculating the instantaneous direction of each receiving antenna of the receiver to be tested at each scene slicing moment; and simultaneously, taking the speed of the moving platform as the instantaneous speed of the antenna of the receiver to be detected.
Optionally, the real-time parameter generating module includes a fourth processing unit, a radiation source PDW calculating unit, a radiation source antenna phase scanning characteristic calculating unit, a measured receiver antenna end PDW calculating unit, and a PDW data stream determining unit;
a fourth processing unit, configured to calculate, according to the position parameter, the direction parameter, and the speed parameter of the radiation source, a relative distance between the transmitter antenna of each radiation source and the antenna port of the measured receiver, an orientation between each measured receiver antenna and the radiation source, and an orientation between the transmitter antenna of each radiation source and the antenna port of the measured receiver;
the radiation source PDW calculation unit is used for calculating the starting time, frequency, power, pulse width and intra-pulse modulation parameters of each pulse of the radiation source pulse by pulse according to the position parameter, the direction parameter and the speed parameter of the radiation source to form output PDW list data of each radiation source;
the radiation source antenna phase scanning characteristic calculation unit is used for calculating the instantaneous phase scanning angle of the PDW of the radiation source pulse by pulse according to the time when each radiation source sends out the PDW and by combining the phase scanning characteristic parameters of the radiation sources;
and the PDW calculating unit of the antenna end face of the measured receiver is used for taking the radiation source PDW as input, combining the distance, the direction and the radial speed among the receiving and transmitting antennas, respectively calculating the correction amounts of time delay, amplitude, phase and frequency shift of the PDW of each receiver end face, and combining the PDW data of the radiation source to form the PDW data of each receiving end face.
And the PDW data flow determining unit is used for calculating the time, amplitude, phase and Doppler frequency shift of the radio frequency signal received by each port of the receiver to be tested and determining the PDW data flow corresponding to the radio frequency signal received by each port.
Optionally, the real-time parameter generating module further includes a converting unit, and the converting unit is configured to convert the PDW data stream into IQ data and store the IQ data as waveform data.
Optionally, the real-time parameter generating module further includes a sorting unit and an extracting unit;
the sequencing unit is used for sequencing the pulse sequence received by the receiver to be tested according to the time of the pulse sequence reaching the receiver to be tested;
and the extraction unit is used for setting a real-time control interval according to the vector signal source, and extracting amplitude, phase and frequency information from the pulse sequence from the initial moment when the pulse sequence reaches the receiver to be detected until the pulse sequence reaches the receiver to be detected.
The real-time parameter control module also comprises a first adjusting unit and a second adjusting unit;
the first adjusting unit is used for adjusting the amplitude and the frequency of the radio-frequency signal of the vector signal source, namely adjusting the amplitude and the frequency of the radio-frequency signal of the vector signal source;
the second adjusting unit is configured to adjust a phase of a radio frequency signal of the vector signal source, that is, adjust a baseband phase of the vector signal source.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A radiation source dynamic scene simulation method based on a vector signal generation device is characterized by comprising the following steps:
an electromagnetic simulation test system is built in a local area network, and phase-coherent signal calibration is carried out; the electromagnetic simulation test system comprises radiation source signal simulation equipment and a vector signal source;
the radiation source signal simulation equipment generates a waveform file containing a baseband signal and transmits the waveform file to the vector signal source;
the vector signal source loads the waveform file to generate a baseband signal;
the radiation source signal simulation equipment sets initial signal parameters of the vector signal source;
the radiation source signal simulation equipment utilizes the motion trail parameters of a radiation source in a dynamic scene to carry out scene calculation, and determines the position parameters, the direction parameters and the speed parameters of the radiation source;
the radiation source signal simulation equipment determines a PDW data stream of the radiation source through radiation source pulse calculation according to the position parameter, the direction parameter and the speed parameter of the radiation source in a dynamic scene, and extracts a real-time control parameter from the PDW data stream;
the radiation source signal simulation equipment adjusts the amplitude, the phase and the frequency of the vector signal source to the initial signal according to the real-time control parameters and the real-time control beat to obtain a radio frequency signal at the current moment;
and the vector signal source injects the radio frequency signal of the current moment into the receiver to be tested.
2. The radiation source dynamic scene simulation method based on the vector signal generation device according to claim 1, wherein the radiation source signal simulation equipment performs scene solution by using motion trajectory parameters of a radiation source in a dynamic scene, and comprises:
setting a time step length, slicing the scene into a plurality of time slices, and acquiring the starting time of each time slice;
determining the instantaneous position, attitude, velocity and acceleration of the moving platform: calculating the position, the motion attitude, the speed and the acceleration of each motion platform at the starting moment of each time slice;
determining the instantaneous position and antenna pointing direction of the radiation source: calculating the absolute coordinates of the radiation source transmitting antenna at the starting moment of each time slice; calculating the direction of the radiation source antenna at each scene slice moment according to the initial direction and the scanning parameters of the radiation source antenna; simultaneously taking the speed of the motion platform as the instantaneous speed of the radiation source;
determining the instantaneous position and antenna pointing direction of the measured receiver antenna: calculating absolute coordinates of each receiving antenna of the receiver to be tested at the starting moment of the time slice by combining the installation position of each receiving antenna of the receiver to be tested according to the time slice data; calculating the instantaneous direction of each receiving antenna of the receiver to be tested at each scene slice moment by combining the initial direction of the antenna of the receiver to be tested and the scanning parameters; and simultaneously taking the speed of the moving platform as the instantaneous speed of the antenna of the receiver to be detected.
3. The radiation source dynamic scene simulation method based on the vector signal generation device as claimed in claim 1, wherein the PDW data stream of the radiation source is determined by radiation source pulse solution, comprising:
calculating the relative distance between the transmitter antenna of each radiation source and the antenna port of the receiver to be tested, the orientation of each receiver antenna to be tested and the radiation source, and the orientation of the transmitter antenna of each radiation source and the receiver antenna to be tested according to the position parameters, the direction parameters and the speed parameters of the radiation sources;
radiation source PDW calculation: calculating the starting time, frequency, power, pulse width and intra-pulse modulation parameters of each pulse of the radiation source pulse by pulse according to the position parameter, the direction parameter and the speed parameter of the radiation source to form output PDW list data of each radiation source;
calculating the phase scanning characteristic of the radiation source antenna: according to the moment when each radiation source emits the PDW, combining the phase scanning characteristic parameters of the radiation sources, and calculating the instantaneous phase scanning angle of the PDW of the radiation sources pulse by pulse;
and PDW calculation of the antenna end face of the measured receiver: respectively calculating the time delay, amplitude, phase and frequency shift correction quantities of the PDW of each receiver end face by taking the PDW as input and combining the distance, the direction and the radial speed between the receiving antenna and the transmitting antenna, and forming PDW data of each receiving end face by combining PDW data of the radiation source;
and calculating the time, amplitude, phase and Doppler frequency shift of each port of the receiver to be tested for receiving the radio frequency signal, and determining the PDW data stream corresponding to the radio frequency signal received by each port.
4. The vector signal generator based radiation source dynamic scene simulation method according to claim 1 or 3, wherein determining the PDW data stream of the radiation source further comprises converting the PDW data stream into IQ data and storing the IQ data as waveform data.
5. The method for simulating the dynamic scene of the radiation source based on the vector signal generating device as claimed in claim 1, wherein the method for extracting the real-time control parameters comprises:
sequencing the pulse sequences received by the receiver to be tested according to the arrival time of the pulse sequences at the receiver to be tested, setting a real-time control interval according to the vector signal source, and extracting amplitude, phase and frequency information from the arriving pulse sequences from the initial moment when the pulse sequences arrive at the receiver to be tested until the pulse sequences arrive at the receiver to be tested.
6. The method for simulating the dynamic scene of the radiation source based on the vector signal generator as claimed in claim 1, wherein the adjusting the parameters of the amplitude, the phase and the frequency of the rf signal of the vector signal source comprises: and adjusting the amplitude and the frequency of the radio-frequency signal of the vector signal source into the amplitude and the frequency of the radio-frequency signal of the vector signal source, and adjusting the phase of the radio-frequency signal of the vector signal source into the baseband phase of the vector signal source.
7. The radiation source dynamic scene simulation device based on the vector signal generation device is characterized by comprising radiation source signal simulation equipment and a vector signal source; the radiation source signal simulation equipment comprises a scene parameter generation module, a baseband signal generation module, a real-time parameter generation module and a real-time parameter control module;
the scene parameter generation module is used for performing scene calculation by utilizing the motion trail parameters of the radiation source in the dynamic scene to determine the position parameters, the direction parameters and the speed parameters of the radiation source;
the baseband signal generation module is used for generating a waveform file of a baseband signal supported by a vector signal source according to a signal pattern in the dynamic scene and transmitting the waveform file to the vector signal source;
the radiation source signal simulation equipment sets initial signal parameters;
the real-time parameter generation module is used for resolving and determining a PDW data stream of the radiation source through radiation source pulses according to the position parameter, the direction parameter and the speed parameter of the radiation source in a dynamic scene and extracting real-time control parameters from the PDW data stream;
the real-time parameter control module is used for adjusting the amplitude, the phase and the frequency of the initial signal of the vector signal source according to the real-time control parameters and the real-time control beat to obtain the radio-frequency signal at the current moment;
and the vector signal source is used for loading the waveform file to generate a baseband signal and injecting the adjusted generated radio frequency signal at the current moment into the receiver to be tested.
8. The vector signal generation device-based radiation source dynamic scene simulation device according to claim 1, wherein the vector signal source comprises a master signal source and a plurality of slave signal sources; the local oscillation signal output end, the reference signal output end and the synchronization and trigger signal output end of the master signal source are connected to the local oscillation signal input end, the reference signal input end and the synchronization and trigger signal input end of one slave signal source; and the local oscillation signal output end, the reference signal output end and the synchronization and trigger signal output end of the former slave signal source are connected to the local oscillation signal input end, the reference signal input end and the synchronization and trigger signal input end of the latter slave signal source among the slave signal sources.
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