CN116500568A - Method and system for generating long-time dynamic multi-target overlapping signals - Google Patents
Method and system for generating long-time dynamic multi-target overlapping signals Download PDFInfo
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Abstract
The invention discloses a method and a system for generating a long-time dynamic multi-target overlapping signal, which relate to the field of radar target signal generation and simulation and comprise the steps of respectively configuring pulse signal parameters for a plurality of simulation targets; synthesizing a plurality of pulse signal parameters by using an ARB mode to generate a multi-target synthesized waveform file; extracting overlapped waveform fragments from the multi-target synthesized waveform file and storing the overlapped waveform fragments into an ARB waveform list file; synthesizing pulse signal parameters of a plurality of simulation targets by using a PDW mode to generate a PDW synthesis description file; a marking field for marking whether the overlapping is performed and a control field for controlling whether the overlapping waveform segment is called are newly added in the PDW synthesis description file, so that a PDW overlapping waveform description file is generated; and transmitting the PDW overlapped waveform description file and the ARB waveform list file to phase difference simulation equipment, and generating a radio frequency signal according to the PDW overlapped waveform description file and transmitting the radio frequency signal to a tested piece. Long-time multi-target overlapping signal compounding is realized, and computing resources are saved.
Description
Technical Field
The invention relates to the field of radar target signal generation and simulation, in particular to a method and a system for generating a long-time dynamic multi-target overlapping signal.
Background
Modern radar systems are comprehensive in function and complex in performance, and can perform operations such as scanning, tracking, identification, target hitting and the like simultaneously. In the development and testing of a radar system, the radar system is usually required to be tested in advance, which requires the simulation of a signal sent by a target. However, the method is limited by hardware conditions and simulation methods, and the scene simulation of signals sent by multiple targets at present can involve long-time simulation and multi-target signal overlapping scenes, in the prior art, a pure PDW mode or a pure digital ARB mode is generally adopted to simulate target signals, and for the pure PDW mode, the long-time pulse characteristics of a single target are described, only one path of target signals can be reserved, and the overlapping of the multi-target signals can not be realized; and the coating time of the pure digital ARB is short, so that long-time signal overlapping cannot be realized. Therefore, a method capable of simulating multi-target signal overlapping and realizing long-time simulation is required.
Disclosure of Invention
The invention aims to provide a method and a device for generating long-time dynamic multi-target overlapping signals, which are used for generating multi-target overlapping signals in order to simulate multi-target scenes, and the ARB coding mode is adopted to superimpose and compound a plurality of target signals into one signal for transmission when the multi-target signals are overlapped.
In one aspect, the present application provides a method for generating a long-term dynamic multi-target overlapping signal, including the following steps:
s1, setting a plurality of simulation targets, and configuring corresponding pulse signal parameters for each simulation target;
s2, synthesizing pulse signal parameters of a plurality of simulation targets by using an ARB mode to generate a multi-target synthesized waveform file; extracting overlapped waveform fragments from the multi-target synthesized waveform file, and storing the overlapped waveform fragments into an ARB waveform list file according to a time sequence;
s3, synthesizing pulse signal parameters of a plurality of simulation targets by using a PDW mode to generate a PDW synthesis description file; adding a marking field and a control field in the PDW synthesis description file to generate a PDW overlapped waveform description file;
the control field is used for judging whether to call the overlapped waveform fragments under the corresponding time sequence from the ARB waveform list file according to the marks of the mark field;
and S4, transmitting the PDW overlapped waveform description file and the ARB waveform list file to time phase difference simulation equipment, sequentially reading each field of each piece of data of the PDW overlapped waveform description file according to time sequences by the time phase simulation equipment, and respectively generating radio frequency signals corresponding to each time sequence and transmitting the radio frequency signals to the tested piece.
Further, the specific process of reading the file from the PDW overlapped waveform description file in step S4 is as follows:
for the piece of data under the current time sequence, firstly reading a mark field of the piece of data from a PDW overlapped waveform description file;
if the marks of the mark fields are overlapped, continuing to read the control words of the control fields, and calling overlapped waveform fragments corresponding to the current time sequence from the ARB waveform list file according to the control words; performing radio frequency modulation on the overlapped waveform segments corresponding to the current time sequence to generate a radio frequency signal under the current time sequence;
if the marks of the mark fields are non-overlapping, continuing to read all other fields of the data, and performing radio frequency modulation according to all the fields corresponding to the data to generate a radio frequency signal under the current time sequence.
Further, the specific process of generating the ARB waveform list file in step S2 is as follows:
s21, encoding signal parameters corresponding to each simulation target according to an ARB format to obtain a waveform file corresponding to each simulation target;
s22, vector synthesis is carried out on the waveform files corresponding to all the simulation targets, and a multi-target synthesized waveform file is obtained;
s23, extracting waveform fragments of the overlapped part from the multi-target synthesized waveform file, and recording pulse arrival time of the waveform fragments of the overlapped part;
and S24, sequentially storing the waveform fragments of the overlapped part and the corresponding pulse arrival time into the ARB waveform list file.
Further, the specific process of step S21 is:
arranging signal parameters corresponding to each simulation target according to the time sequence to obtain envelope information of target signals;
and executing intra-pulse information processing, adding intra-pulse information for each piece of envelope information, and generating a waveform file corresponding to each simulation target.
Further, in step S22, the vector synthesis process is as follows:
converting waveform files corresponding to all simulation targets into time domain signals in the same time domain respectively;
superposing the amplitudes of all time domain signals at the same moment to obtain multi-target overlapped time domain signals;
and converting the multi-target overlapped time domain signals into a multi-target synthesized waveform file.
Further, the data structure of the PDW overlap waveform description file includes fields: pulse arrival time, pulse width, carrier frequency, frequency offset, phase, amplitude, echo type, signature field, and control field.
In a second aspect, the present application provides a system for generating a long-term dynamic multi-target overlapping signal, including:
comprising the following steps: a multi-target overlapping signal generating device and a time phase simulation device; the multi-target overlapping signal generating apparatus includes:
the simulation target construction module is used for setting a plurality of simulation targets and configuring corresponding pulse signal parameters for each simulation target;
the ARB modulation module is used for synthesizing the pulse signal parameters of a plurality of simulation targets by utilizing an ARB mode to generate a multi-target synthesized waveform file; extracting overlapped waveform fragments from the multi-target synthesized waveform file, and storing the overlapped waveform fragments into an ARB waveform list file according to a time sequence;
the PDW modulation module is used for synthesizing pulse signal parameters of a plurality of simulation targets by utilizing a PDW mode to generate a PDW synthesis description file; adding a marking field and a control field in the PDW synthesis description file to generate a PDW overlapped waveform description file;
the control field is used for judging whether to call the overlapped waveform fragments under the corresponding time sequence from the ARB waveform list file according to the marks of the mark field;
the sending module is used for sending the PDW overlapped waveform description file and the ARB waveform list file to the time phase simulation equipment;
the time difference simulation device is used for sequentially reading each field of each piece of data of the PDW overlapped waveform description file according to the time sequence, respectively generating radio frequency signals corresponding to each time sequence and sending the radio frequency signals to the tested piece.
Further, the phase difference simulation apparatus includes:
the reading module is used for reading all fields of the piece of data corresponding to the current time sequence from the PDW overlapped waveform description file;
the judging module is used for judging according to the mark field of the piece of data; obtaining a judging result of whether the current time sequence is overlapped or not;
the radio frequency signal generating module is used for calling an overlapped waveform segment corresponding to the current time sequence from the ARB waveform list file according to the control word of the control field when the marks of the mark fields are overlapped according to the judging result; performing radio frequency modulation on the overlapped waveform segments under the current time sequence to generate a radio frequency signal under the current time sequence;
and when the marks of the mark fields are non-overlapping, performing radio frequency modulation on all the fields corresponding to the data, and generating a radio frequency signal under the current time sequence.
The invention has the beneficial effects that:
for the method of generating a PDW pulse description file only by PDW or generating an ARB waveform file only by ARB in the prior art, as the PDW pulse description word can realize infinitely long-time scene simulation, the data volume can be greatly reduced, but the superposition of multiple target signals can not be realized, only one target signal can be reserved at the same time, and only the ARB mode is used, the cladding time of the generated signal envelope is short, and the long-time signal superposition can not be realized.
Therefore, in order to simulate a scene of multi-target long-time signal overlapping and generate multi-target overlapping signals, the ARB coding mode is adopted, a plurality of target signals are overlapped and compounded into one signal to be sent when the multi-target signals are overlapped, and as signals of different targets can be compounded, the PDW pulse description word mode is adopted to send, so that calculation resources are saved. In addition, for a single-target simulation scene, a traditional PDW mode is adopted, and in a multi-target simulation scene, PDW is utilized to call corresponding overlapped waveform fragments from an ARB waveform file list, and multi-target overlapped signals are sent, so that simulation of various scenes can be realized.
Drawings
FIG. 1 is a diagram of a multi-target signal processing method in a PDW mode in a multi-target simulation scenario according to the prior art;
FIG. 2 is a schematic waveform diagram of a composite signal generated when waveforms of multiple target signals overlap when a PDW mode is adopted in a multiple target simulation scenario in the prior art;
FIG. 3 is a schematic diagram of a PDW description file data storage generated when a PDW mode is adopted in a multi-target simulation scenario in the prior art;
FIG. 4 is a diagram of a multi-target signal processing method in the ARB mode in a multi-target simulation scenario according to the prior art;
FIG. 5 is a schematic waveform diagram of a composite signal generated when waveforms of multiple target signals overlap when ARB mode is adopted in a multiple target simulation scenario in the prior art;
FIG. 6 is a schematic diagram of vector synthesis of overlapping signals in the time domain when waveforms of multiple target signals overlap in the prior art;
FIG. 7 is a flowchart of a method for generating a signal with long-term dynamic multi-objective overlapping in a multi-objective simulation scenario according to an embodiment of the present invention;
fig. 8 is a schematic diagram of data storage of a PDW overlapped waveform description file according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a waveform of a synthesized signal generated after overlapping waveform files of a multi-target signal according to an embodiment of the present invention;
fig. 10 is a functional diagram of a signal generating system with long-term dynamic multi-objective overlapping in a multi-objective simulation scenario according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
In addition, descriptions of well-known structures, functions and configurations may be omitted for clarity and conciseness. Those of ordinary skill in the art will recognize that various changes and modifications of the examples described herein can be made without departing from the spirit and scope of the present disclosure.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
Before introducing the technical solution of the present application, concepts to be referred to will be described:
1、PDW：
the PDW is a pulse descriptor which can describe long-time pulse characteristics by occupying a small amount of memory, and the pulse descriptor is a signal specially used for describing a pulse modulation type, and has the advantage of greatly reducing the data volume. For one signal source, a plurality of transmitters can be simulated by writing scene information by using a radar pulse word (PDW), and specific scenes such as a scene of a high-density signal, an angle of arrival (AOA) and the like can be simulated by using a plurality of signal sources. The signal system of the traditional waveform playing mode is flexible, but the memory occupies a large playing time and is limited; the memory is greatly saved by adopting a PDW state storage mode, and scene playing for a few hours is easily realized; the infinite long-time scene simulation can be realized through the real-time PDW input mode. The Pulse Descriptor (PDW) describes an important feature of the information carried by each pulse seen by a receiver.
2、ARB：
ARB represents an arbitrary waveform file, is a vector signal generation mode, and the process of the ARB mode before DAC is realized on a PC through corresponding software (the software can be Agilent signal studio, matlab, visual), and the data is stored in a RAM in a signal source in the form of a waveform file after being encoded. The ARB is flexible in application and can be used for generating arbitrary waveforms in a user-defined manner.
As shown in fig. 1, since the PDW pulse descriptor is used for a target scenario where multiple targets are interleaved, only one target signal is processed based on the user-defined priority, and the discarding priority is low, for example, as shown in fig. 2, signals #1, #2, #3 of three targets are given, and the priority (Prio) #1 of each signal is highest, #2 times, and #3 is lowest. After processing in the manner of fig. 2, the processed waveform (Result) parameters are written into a PDW pulse description file, and in general, as shown in fig. 3, the PDW pulse description file may include fields: pulse arrival Time (TOA), pulse Width (Width), carrier frequency (Center), frequency Offset (Offset), phase, amplitude (Level), echo type (MOP), etc. The structure of the pulse descriptors will vary depending on the particular information and application desired.
In the ARB mode, as shown in fig. 4, 5, and 6, the cladding time of the generated signal envelope is short in the overlapping stage, and long-time signal overlapping cannot be achieved. Therefore, if an overlapping signal of long-time dynamic multi-object overlapping is to be generated in a multi-object simulation scene, the present application adopts the following scheme:
example 1
The embodiment 1 provides a method for generating a long-term dynamic multi-target overlapping signal, as shown in fig. 7, wherein a generating device of the long-term dynamic multi-target overlapping signal sends a generated file to a time phase difference simulation device, and generates a radio frequency signal through the time phase difference simulation device and sends the radio frequency signal to a tested piece, and the specific process includes the following steps:
s1, setting a plurality of simulation targets, and configuring corresponding pulse signal parameters for each simulation target;
s2, synthesizing pulse signal parameters of a plurality of simulation targets by using an ARB mode to generate a multi-target synthesized waveform file; extracting overlapped waveform fragments from the multi-target synthesized waveform file, and storing the overlapped waveform fragments into an ARB waveform list file according to a time sequence;
s3, synthesizing pulse signal parameters of a plurality of simulation targets by using a PDW mode to generate a PDW synthesis description file; adding a marking field and a control field in the PDW synthesis description file to generate a PDW overlapped waveform description file;
the control field is used for judging whether to call the overlapped waveform fragments under the corresponding time sequence from the ARB waveform list file according to the marks of the mark field;
and S4, transmitting the PDW overlapped waveform description file and the ARB waveform list file to time phase difference simulation equipment, and sequentially reading all fields of each piece of data from the PDW overlapped waveform description file according to a time sequence by the time phase simulation equipment, and generating a radio frequency signal of the current time sequence and transmitting the radio frequency signal to a tested piece.
Specifically, in the time phase apparatus, the process of reading data is:
s41, for the piece of data under the current time sequence, firstly reading a mark field of the piece of data from a PDW overlapped waveform description file;
s42, if the marks of the mark fields are overlapped, continuing to read the control words of the control fields, and calling overlapped waveform fragments under the current time sequence from the ARB waveform list file according to the control words; performing radio frequency modulation on the overlapped waveform segments under the current time sequence to generate a radio frequency signal under the current time sequence;
and S43, if the marks of the mark fields are non-overlapped, continuing to read all other fields of the data, and performing radio frequency modulation according to all the fields corresponding to the data to generate a radio frequency signal under the current time sequence.
In a specific embodiment, the specific process of generating the ARB waveform list file in step S2 is:
s21, encoding signal parameters corresponding to each simulation target according to an ARB format to obtain a waveform file corresponding to each simulation target;
the specific process of step S21 is:
arranging signal parameters corresponding to each simulation target according to the time sequence to obtain envelope information of target signals;
and executing intra-pulse information processing, adding intra-pulse information for each piece of envelope information, and generating a waveform file corresponding to each simulation target.
S22, vector synthesis is carried out on the waveform files corresponding to all the simulation targets, and a multi-target synthesized waveform file is obtained;
in step S22, the vector synthesis process is as follows:
converting waveform files corresponding to all simulation targets into time domain signals in the same time domain respectively;
superposing the amplitudes of all time domain signals at the same moment to obtain multi-target overlapped time domain signals;
and converting the multi-target overlapped time domain signals into a multi-target synthesized waveform file.
S23, extracting waveform fragments of the overlapped part from the multi-target synthesized waveform file, and recording pulse arrival time of the waveform fragments of the overlapped part;
and S24, sequentially storing the waveform fragments of the overlapped part and the corresponding pulse arrival time into the ARB waveform list file.
It will be appreciated that the data structure of the PDW overlap waveform description file in this embodiment includes fields: pulse arrival time, pulse width, carrier frequency, frequency offset, phase, amplitude, echo type, signature field, and control field. Specifically, as shown in fig. 8, a data storage structure of a PDW overlap waveform description file is given. It should be noted that, the time sequence and the current time sequence mentioned in the present application correspond to the pulse arrival time, which can be understood that the current time sequence takes the current pulse arrival time as the starting time, the whole time period from the current pulse arrival time to the next pulse arrival time is the current time sequence, and the starting time of the time sequence is the arrival time of the previous pulse in the two adjacent pulses.
Referring to fig. 9, if the corresponding waveform files generated by the pulse signal parameters of the three simulation targets are #1, #2, and #3, it can be seen that the three targets overlap at time sequences T1-T2 and T3-T4, so that vector waveforms of the three waveform files are superimposed by an ARB method, and a resultant waveform (Result) is finally generated, as shown in fig. 9, an overlapping waveform segment is extracted from the resultant waveform (Result), pulse arrival time and end time of the overlapping waveform segment are recorded, and sequentially stored in an ARB waveform list according to the storage sequence of #1, #2 … in order of pulse arrival time, and finally an ARB waveform list file is generated according to the ARB waveform list.
Meanwhile, for the multi-target waveforms of fig. 9, the PDW synthesis description file is generated according to the PDW mode, and since the PDW discards the waveform with lower priority in the PDW synthesis description file at the time sequence of waveform overlapping, only one target waveform is reserved, and therefore, a control field and a flag field need to be added in the PDW synthesis description file. When the PDW synthesis description file is generated, simultaneously recording when the waveform fragments are discarded, wherein the waveform at the time sequence is non-overlapped when 0 represents the arrival time of the pulse to the arrival time of the next pulse in the mark field, and the waveform at the time sequence is overlapped when 1 represents the arrival time of the pulse to the arrival time of the next pulse; when the tag value of the tag field is read to be 0, the conventional PDW mode can be directly adopted, and all fields of the data corresponding to the current time sequence are generated into a parameter file so as to carry out radio frequency modulation, so that a radio frequency signal under the current time sequence is generated. If the tag value is 1, the control field is read, and the overlapped waveform segment corresponding to the current time sequence is called from the ARB waveform list file according to the control word of the control field, specifically, since the pulse arrival time of the TOA field of the PDW overlapped waveform description file corresponds to the time sequence start time of the ARB waveform list, the overlapped waveform segment corresponding to the storage sequence number can be called from the ARB waveform list according to the pulse arrival time.
The PDW overlapped waveform description file of fig. 8 is sent to the time difference simulation device, each piece of data is sequentially read according to time sequence, and the arrival interval of two adjacent pulses can be regarded as a time sequence, for example, signals of a plurality of targets overlap in a period of T1-T2, so that overlapped waveform fragments with a storage sequence number of 1# are called from the ARB waveform list file according to a control word, multi-target signal transmission is generated according to the overlapped waveform fragments, but in the period of T2-T3, the situation is non-overlapped, and at this time, the target signal transmission can be directly generated according to the PDW overlapped waveform description file corresponding to the time T2. Similarly, in the period of T5-T6, the multi-target signals overlap, and at the moment, overlapping waveform fragments with the storage sequence number of 2# are called from the ARB waveform list file again, and multi-target signal transmission is generated according to the overlapping waveform fragments.
Example 2
As shown in fig. 10, the present embodiment provides a system for generating a long-term dynamic multi-target overlapping signal, including: a multi-target overlapping signal generating device and a time phase simulation device; the multi-target overlapping signal generating apparatus includes:
the simulation target construction module is used for setting a plurality of simulation targets and configuring corresponding pulse signal parameters for each simulation target;
the ARB modulation module is used for synthesizing the pulse signal parameters of a plurality of simulation targets by utilizing an ARB mode to generate a multi-target synthesized waveform file; extracting overlapped waveform fragments from the multi-target synthesized waveform file, and storing the overlapped waveform fragments into an ARB waveform list file according to a time sequence;
the PDW modulation module is used for synthesizing pulse signal parameters of a plurality of simulation targets by utilizing a PDW mode to generate a PDW synthesis description file; adding a marking field and a control field in the PDW synthesis description file to generate a PDW overlapped waveform description file;
the control field is used for judging whether to call the overlapped waveform fragments under the corresponding time sequence from the ARB waveform list file according to the marks of the mark field;
the sending module is used for sending the PDW overlapped waveform description file and the ARB waveform list file to the time phase simulation equipment;
and the time difference simulation equipment is used for reading all fields of each piece of data from the PDW overlapped waveform description file according to the time sequence in sequence, generating a radio frequency signal of the current time sequence and transmitting the radio frequency signal to the tested piece.
The phase difference simulation apparatus includes:
the reading module is used for reading all fields of the piece of data corresponding to the current time sequence from the PDW overlapped waveform description file;
the judging module is used for judging according to the mark field of the piece of data; obtaining a judging result of whether the current time sequence is overlapped or not;
the radio frequency signal generating module is used for calling an overlapped waveform segment corresponding to the current time sequence from the ARB waveform list file according to the control word of the control field when the marks of the mark fields are overlapped according to the judging result; performing radio frequency modulation on the overlapped waveform segments corresponding to the current time sequence to generate a radio frequency signal under the current time sequence;
and when the marks of the mark fields are non-overlapping, performing radio frequency modulation on all the fields corresponding to the data, and generating a radio frequency signal under the current time sequence.
The foregoing description of the preferred embodiment of the invention is not intended to limit the invention in any way, but rather to cover all modifications, equivalents, improvements and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The method for generating the long-time dynamic multi-target overlapped signal is characterized by comprising the following steps of:
s1, setting a plurality of simulation targets, and configuring corresponding pulse signal parameters for each simulation target;
s2, synthesizing pulse signal parameters of a plurality of simulation targets by using an ARB mode to generate a multi-target synthesized waveform file; extracting overlapped waveform fragments from the multi-target synthesized waveform file, and storing the overlapped waveform fragments into an ARB waveform list file according to a time sequence;
s3, synthesizing pulse signal parameters of a plurality of simulation targets by using a PDW mode to generate a PDW synthesis description file; adding a marking field and a control field in the PDW synthesis description file to generate a PDW overlapped waveform description file;
the control field is used for judging whether to call the overlapped waveform segments of the current time sequence from the ARB waveform list file according to the marks of the mark fields;
and S4, transmitting the PDW overlapped waveform description file and the ARB waveform list file to time phase difference simulation equipment, sequentially reading each field of each piece of data of the PDW overlapped waveform description file according to time sequences by the time phase simulation equipment, and respectively generating radio frequency signals corresponding to each time sequence and transmitting the radio frequency signals to the tested piece.
2. The method for generating a long-term dynamic multi-target overlapping signal according to claim 1, wherein the specific process of reading each piece of data of the PDW overlapping waveform description file in step S4 is as follows:
for each piece of data, firstly reading a mark field of the piece of data from a PDW overlapped waveform description file;
if the marks of the mark fields are overlapped, continuing to read the control words of the control fields, and calling overlapped waveform fragments corresponding to the current time sequence from the ARB waveform list file according to the control words; performing radio frequency modulation on the overlapped waveform segments corresponding to the current time sequence to generate a radio frequency signal under the current time sequence;
if the marks of the mark fields are non-overlapping, continuing to read all other fields of the data, and performing radio frequency modulation according to all the fields corresponding to the data to generate a radio frequency signal under the current time sequence.
3. The method for generating long-term dynamic multi-target overlapping signals according to claim 1, wherein the specific process of generating the ARB waveform list file in step S2 is as follows:
s21, encoding signal parameters corresponding to each simulation target according to an ARB format to obtain a waveform file corresponding to each simulation target;
s22, vector synthesis is carried out on the waveform files corresponding to all the simulation targets, and a multi-target synthesized waveform file is obtained;
s23, extracting waveform fragments of the overlapped part from the multi-target synthesized waveform file, and recording pulse arrival time of the waveform fragments of the overlapped part;
and S24, sequentially storing the waveform fragments of the overlapped part and the corresponding pulse arrival time into the ARB waveform list file.
4. The method for generating a long-term dynamic multi-target overlapping signal according to claim 3, wherein the specific process of step S21 is as follows:
arranging signal parameters corresponding to each simulation target according to the time sequence to obtain envelope information of target signals;
and executing intra-pulse information processing, adding intra-pulse information for each piece of envelope information, and generating a waveform file corresponding to each simulation target.
5. A method for generating a long-term dynamic multi-target overlapping signal according to claim 3, wherein in step S22, the process of vector synthesis is as follows:
converting waveform files corresponding to all simulation targets into time domain signals in the same time domain respectively;
superposing the amplitudes of all time domain signals at the same moment to obtain multi-target overlapped time domain signals;
and converting the multi-target overlapped time domain signals into a multi-target synthesized waveform file.
6. The method of generating a long-term dynamic multi-target overlap signal according to claim 4, wherein the data structure of the PDW overlap waveform description file comprises the fields of: pulse arrival time, pulse width, carrier frequency, frequency offset, phase, amplitude, echo type, signature field, and control field.
7. A system for generating a long-term dynamic multi-target overlapping signal, comprising: a multi-target overlapping signal generating device and a time phase simulation device; the multi-target overlapping signal generating apparatus includes:
the simulation target construction module is used for setting a plurality of simulation targets and configuring corresponding pulse signal parameters for each simulation target;
the ARB modulation module is used for synthesizing the pulse signal parameters of a plurality of simulation targets by utilizing an ARB mode to generate a multi-target synthesized waveform file; extracting overlapped waveform fragments from the multi-target synthesized waveform file, and storing the overlapped waveform fragments into an ARB waveform list file according to a time sequence;
the PDW modulation module is used for synthesizing pulse signal parameters of a plurality of simulation targets by utilizing a PDW mode to generate a PDW synthesis description file; adding a marking field and a control field in the PDW synthesis description file to generate a PDW overlapped waveform description file;
the control field is used for judging whether to call the overlapped waveform fragments under the corresponding time sequence from the ARB waveform list file according to the marks of the mark field;
the sending module is used for sending the PDW overlapped waveform description file and the ARB waveform list file to the time phase simulation equipment;
the time difference simulation device is used for sequentially reading each field of each piece of data of the PDW overlapped waveform description file according to the time sequence, respectively generating radio frequency signals corresponding to each time sequence and sending the radio frequency signals to the tested piece.
8. The system for generating a long-term dynamic multi-target overlapping signal as recited in claim 7, wherein the phase modeling means comprises:
the reading module is used for reading all fields of the piece of data corresponding to the current time sequence from the PDW overlapped waveform description file;
the judging module is used for judging according to the mark field of the piece of data; obtaining a judging result of whether the current time sequence is overlapped or not;
the radio frequency signal generating module is used for calling an overlapped waveform segment corresponding to the current time sequence from the ARB waveform list file according to the control word of the control field when the marks of the mark fields are overlapped according to the judging result; performing radio frequency modulation on the overlapped waveform segments corresponding to the current time sequence to generate a radio frequency signal under the current time sequence;
and when the marks of the mark fields are non-overlapping, performing radio frequency modulation on all the fields corresponding to the data, and generating a radio frequency signal under the current time sequence.
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