CN113985377A - High-isolation radar polarization signal simulation method, device, equipment and medium - Google Patents
High-isolation radar polarization signal simulation method, device, equipment and medium Download PDFInfo
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Abstract
The application relates to the technical field of electromagnetic wave modulation, in particular to a high-isolation radar polarization signal simulation method, device, equipment and medium, wherein the method comprises the following steps: down-converting a received radio frequency signal sent by a radar to be detected into an intermediate frequency signal; preprocessing the intermediate frequency signal to obtain two paths of horizontal polarization echo signals and two paths of vertical polarization echo signals, and modulating the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to enable the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to be in equal-amplitude and in-phase; the two horizontal polarization echo signals with the same amplitude and phase are subjected to up-conversion processing and then input to a horizontal polarization antenna, the two vertical polarization echo signals with the same amplitude and phase are subjected to up-conversion processing and then input to a vertical polarization antenna, and the processed echo signals are sent to a radar to be detected through the horizontal polarization antenna and the vertical polarization antenna. Therefore, a high-isolation all-polarization radar target signal radiation source can be generated, and the measurement and calibration requirements of the polarization radar are met.
Description
Technical Field
The present disclosure relates to the field of electromagnetic wave modulation technologies, and in particular, to a method, an apparatus, a device, and a medium for simulating a high-isolation radar polarization signal.
Background
Polarization is an essential property of electromagnetic waves, and forms a complete description of the electromagnetic waves together with parameters such as amplitude, phase, frequency and the like. The acquisition of the target polarization information not only can provide more comprehensive target information for the radar, but also can play an important role in improving the target detection, target identification, anti-stealth, anti-interference and other capabilities of the radar as the basis of polarization information processing. In this context, fully polarized radar is one of the hot spots in current polarization measurement research. In the radar development stage, a polarized target simulator is generally adopted to realize the test of a radar system.
However, the problem of mutual coupling of antennas of simulators has been a major difficulty in design, and a signal radiation source with low cross polarization and ultra-high isolation is generally difficult to implement, and needs to be solved urgently.
Disclosure of Invention
The application provides a high-isolation radar polarization signal simulation method, device, equipment and medium, which can generate a high-isolation all-polarization radar target signal radiation source and meet the measurement and calibration requirements of a polarization radar.
The embodiment of the first aspect of the application provides a high-isolation radar polarization signal simulation method, which comprises the following steps:
receiving a radio frequency signal sent by a radar to be detected, and converting the radio frequency signal into an intermediate frequency signal in a down-conversion mode;
preprocessing the intermediate frequency signal to obtain two paths of horizontal polarization echo signals and two paths of vertical polarization echo signals, and modulating the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to enable the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to be in equal-amplitude and in-phase; and
the method comprises the steps that two horizontal polarization echo signals with the same amplitude and phase are subjected to up-conversion processing and then input to a horizontal polarization antenna, two vertical polarization echo signals with the same amplitude and phase are subjected to up-conversion processing and then input to a vertical polarization antenna, and the processed echo signals are sent to a radar to be detected through the horizontal polarization antenna and the vertical polarization antenna.
Optionally, the preprocessing the intermediate frequency signal to obtain two horizontal polarization echo signals and two vertical polarization echo signals includes:
converting the intermediate frequency signal into a digital signal;
performing orthogonal digital down-mixing processing on the digital signal, and extracting to obtain an I path signal and a Q path signal;
and obtaining the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals based on the I path signals and the Q path signals.
Optionally, the modulating the two horizontal polarization echo signals and the two vertical polarization echo signals so that the two horizontal polarization echo signals and the two vertical polarization echo signals have equal amplitudes and are in phase includes:
and adjusting the two paths of horizontal polarization echo signals to a preset amplitude phase based on a first amplitude and a first phase, and adjusting the two paths of vertical polarization echo signals to the preset amplitude phase based on a second amplitude and a second phase.
Optionally, the performing quadrature digital down-mixing processing on the digital signal includes:
based on the digital signal, performing digital down-conversion processing on the digital signal at a preset sampling rate carrier frequency in a preset alternate-one inversion mode to obtain a processed signal;
performing anti-aliasing low-pass filtering on the processed signal to extract a useful signal;
and carrying out IQ two-path separation processing on the basis of the useful signal to obtain an I-path signal and a Q-path signal after odd-even extraction.
Optionally, the preset sampling rate carrier frequency is determined by an a/D clock.
The embodiment of the second aspect of the present application provides a high-isolation radar polarization signal simulation apparatus, including:
the receiving module is used for receiving a radio frequency signal sent by a radar to be detected and converting the radio frequency signal into an intermediate frequency signal in a down-conversion mode;
the modulation module is used for preprocessing the intermediate frequency signal to obtain two paths of horizontal polarization echo signals and two paths of vertical polarization echo signals, and modulating the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to enable the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to be in equal-amplitude and in-phase; and
and the sending module is used for inputting the two horizontal polarization echo signals with the same amplitude and phase to the horizontal polarization antenna after up-conversion processing, inputting the two vertical polarization echo signals with the same amplitude and phase to the vertical polarization antenna after up-conversion processing, and sending the processed echo signals to the radar to be detected through the horizontal polarization antenna and the vertical polarization antenna.
Optionally, the modulation module is specifically configured to:
converting the intermediate frequency signal into a digital signal;
performing orthogonal digital down-mixing processing on the digital signal, and extracting to obtain an I path signal and a Q path signal;
and obtaining the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals based on the I path signals and the Q path signals.
Optionally, the modulation module is specifically configured to:
and adjusting the two paths of horizontal polarization echo signals to a preset amplitude phase based on a first amplitude and a first phase, and adjusting the two paths of vertical polarization echo signals to the preset amplitude phase based on a second amplitude and a second phase.
Optionally, the modulation module is specifically configured to:
based on the digital signal, performing digital down-conversion processing on the digital signal at a preset sampling rate carrier frequency in a preset alternate-one inversion mode to obtain a processed signal;
performing anti-aliasing low-pass filtering on the processed signal to extract a useful signal;
and carrying out IQ two-path separation processing on the basis of the useful signal to obtain an I-path signal and a Q-path signal after odd-even extraction.
Optionally, the preset sampling rate carrier frequency is determined by an a/D clock.
An embodiment of a third aspect of the present application provides an electronic device, including: the simulation system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the simulation method of the high-isolation radar polarization signal according to the embodiment.
A fourth aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, where the program is executed by a processor, so as to implement the above-mentioned high-isolation radar polarization signal simulation method.
Therefore, a radio frequency signal sent by a radar to be detected can be received, the radio frequency signal is converted into an intermediate frequency signal through down conversion, the intermediate frequency signal is preprocessed to obtain two paths of horizontal polarization echo signals and two paths of vertical polarization echo signals, the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals are modulated to enable the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to be in equal-amplitude and in-phase, the two paths of horizontal polarization echo signals in equal-amplitude and in-phase are subjected to up-conversion processing and then input to a horizontal polarization antenna, the two paths of vertical polarization echo signals in equal-amplitude and in-phase are subjected to up-conversion processing and then input to a vertical polarization antenna, and the processed echo signals are sent to the radar to be detected through the horizontal polarization antenna and the vertical polarization antenna. Therefore, a high-isolation all-polarization radar target signal radiation source can be generated, and the measurement and calibration requirements of the polarization radar are met.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a method for simulating a polarization signal of a high-isolation radar according to an embodiment of the present application;
FIG. 2 is an exemplary diagram of a high-isolation radar polarization signal simulator under test according to an embodiment of the present application;
FIG. 3 is a block diagram of an exemplary signal processing FPGA (Programmable device) according to an embodiment of the present application;
FIG. 4 is a flow diagram of FPGA signal processing according to one embodiment of the present application;
FIG. 5 is a flow diagram of quadrature digital down-mixing according to one embodiment of the present application;
FIG. 6 is an exemplary diagram of a high isolation radar polarization signal simulation apparatus according to an embodiment of the present application;
fig. 7 is an exemplary diagram of an electronic device according to an embodiment of the application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The high-isolation radar polarization signal simulation method, device, equipment and medium according to the embodiments of the present application are described below with reference to the accompanying drawings. Aiming at the problem that a signal radiation source with low cross polarization and ultrahigh isolation is difficult to realize, the application provides a high-isolation radar polarization signal simulation method, in the method, a radio frequency signal sent by a radar to be tested can be received and is converted into an intermediate frequency signal in a down-conversion mode, and pre-processes the intermediate frequency signal to obtain two paths of horizontal polarization echo signals and two paths of vertical polarization echo signals, and modulates the two horizontal polarization echo signals and the two vertical polarization echo signals to make the two horizontal polarization echo signals and the two vertical polarization echo signals have the same amplitude and phase, two paths of horizontal polarization echo signals with equal amplitude and same phase are up-converted and input to a horizontal polarization antenna, two paths of vertical polarization echo signals with equal amplitude and same phase are up-converted and input to a vertical polarization antenna, and the processed echo signals are sent to the radar to be detected through the horizontal polarization antenna and the vertical polarization antenna. Therefore, a high-isolation all-polarization radar target signal radiation source can be generated, and the measurement and calibration requirements of the polarization radar are met.
Specifically, fig. 1 is a schematic flow chart of a method for simulating a polarization signal of a high-isolation radar according to an embodiment of the present disclosure.
In this embodiment, as shown in fig. 2 and fig. 3, the high-isolation radar polarization signal simulation method according to the embodiment of the present application may be implemented based on a high-isolation radar polarization signal simulator to be tested, where the high-isolation radar polarization signal simulator to be tested includes: simulator host computer and antenna unit, wherein, the simulator host computer includes: the microwave link unit comprises a down-conversion unit, an industrial personal computer, a microwave link unit, an up-conversion unit and a signal processing FPGA. The signal processing FPGA comprises an AD (analog-to-digital)/DA (digital-to-analog) sub-card and a memory sub-card, and is used for processing and generating low-frequency polarization signals, and the signal processing FPGA is used for simulating and generating radar polarization signals. The method comprises the processes of ADC (analog-to-digital converter), frequency measurement, Doppler modulation, delay modulation, clutter generation, amplitude modulation, DAC and the like; the industrial personal computer is used for man-machine interaction and can control and issue target parameters under different scenes; the microwave link is used for controlling signal frequency, an output port of a down-conversion module (namely a microwave link unit-down conversion) of the microwave link is connected with an input port of a signal processing FPGA (field programmable gate array), the down-conversion module is used for down-converting a received radio-frequency signal into an intermediate-frequency signal and then sending the intermediate-frequency signal to the FPGA for processing, an output end of the FPGA signal processing unit is connected with the microwave link unit-up conversion, the processed signal is up-converted and then sent to an antenna extension (namely an antenna unit), and the antenna unit can comprise two X/Ku waveband horizontal polarization antennas, two X/Ku waveband vertical polarization antennas, two Ka waveband horizontal polarization antennas, two Ka waveband vertical polarization antennas, two W waveband horizontal polarization antennas, two W waveband vertical polarization antennas, a set of antenna supporting structure and a set of antenna position adjusting structure.
Therefore, the simulator host receives the radar signal to be tested through the radio frequency cable, processes and generates the polarization echo signal and then sends the polarization echo signal to the antenna unit, and the antenna unit feeds the signal to the radar to be tested in an air mode, so that the simulation of the polarization signal of the high-isolation radar is realized.
Specifically, as shown in fig. 1, the high-isolation radar polarization signal simulation method includes the following steps:
in step S101, a radio frequency signal sent by a radar to be detected is received, and the radio frequency signal is down-converted into an intermediate frequency signal.
Specifically, as can be seen from fig. 2 and 3, the microwave link unit-down converter may be directly connected to the radar to be detected through a cable, directly receive a radar signal (i.e., a radio frequency signal) through a line feed mode, convert the radio frequency signal down into an intermediate frequency signal, and send the intermediate frequency signal to the signal processing FPGA.
In step S102, the intermediate frequency signal is preprocessed to obtain two horizontal polarization echo signals and two vertical polarization echo signals, and the two horizontal polarization echo signals and the two vertical polarization echo signals are modulated, so that the two horizontal polarization echo signals and the two vertical polarization echo signals have the same amplitude and are in the same phase.
Optionally, in some embodiments, preprocessing the intermediate frequency signal to obtain two horizontally polarized echo signals and two vertically polarized echo signals includes: converting the intermediate frequency signal into a digital signal; performing orthogonal digital down-mixing processing on the digital signal, and extracting to obtain an I path signal and a Q path signal; and obtaining two paths of horizontal polarization echo signals and two paths of vertical polarization echo signals based on the I path signals and the Q path signals.
Specifically, as shown in fig. 4, in the embodiment of the present application, a horizontally polarized intermediate frequency signal in the intermediate frequency signal may be input to the FPGA1, a vertically polarized intermediate frequency signal in the intermediate frequency signal may be input to the FPGA2, and be down-converted into an intermediate frequency real signal through a microwave link unit, and an analog signal may be converted into a digital signal through a DAC (digital-to-analog conversion digital-to-analog converter) daughter card, where the ADC1 is configured to receive the down-converted horizontally polarized signal, the ADC2 is configured to receive the down-converted vertically polarized signal, and signal processing of the ADC1 and the ADC2 need to be synchronized.
Further, the digital signal is further subjected to quadrature digital down-mixing, and the signals are extracted into I-path signals and Q-path signals.
Optionally, in some embodiments, the quadrature digital down-mixing processing is performed on the digital signal, and includes: based on the digital signal, performing digital down-conversion processing on the digital signal at a preset sampling rate carrier frequency in a preset alternate-one inversion mode to obtain a processed signal; performing anti-aliasing low-pass filtering on the processed signal to extract a useful signal; IQ two-path separation processing is carried out on the basis of the useful signals to obtain I-path signals and Q-path signals after odd-even extraction.
Optionally, in some embodiments, the preset sampling rate carrier frequency is determined by an a/D clock.
Specifically, as shown in fig. 5, since the quadrature digital down-mixing is characterized by no multiplier, the signal processing flow is as follows:
(1) due to the four values of "normalization" in the digital domain: 0, +1, 0, -1 can describe the sine wave completely, adopt the way of "taking the inverse at an interval" to realize the digital frequency down conversion processing of the carrier frequency of quarter sampling rate.
(2) And performing anti-aliasing low-pass filtering to extract a useful signal.
(3) The IQ two-way separation simultaneously achieves parity extraction.
It should be noted that the sampling rate of the system after the digital down conversion is half of the a/D clock, which saves the hardware resource of the FPGA and is beneficial to reducing the power consumption of the system.
Therefore, through algorithm processing, echo information such as low-frequency IQ signal modulation delay, Doppler, clutter and the like is generated, and two low-frequency signals (namely two horizontal polarization echo signals) with target modulation signals are generated in the FPGA 1; two low-frequency signals (i.e., two vertical polarization echo signals) with target modulation signals are also generated in the FPGA 2.
Further, in some embodiments, modulating the two horizontally polarized echo signals and the two vertically polarized echo signals such that the two horizontally polarized echo signals and the two vertically polarized echo signals are in equal-amplitude and in-phase includes: and adjusting the two paths of horizontal polarization echo signals to a preset amplitude phase based on the first amplitude and the first phase, and adjusting the two paths of vertical polarization echo signals to a preset amplitude phase based on the second amplitude and the second phase.
Specifically, as shown in fig. 4, the embodiments of the present application may control the four information generated by the FPGA1 and the FPGA2 to have the same amplitude and phase, and control the equivalent position of the synthesized signal to be at the same point, and in the adjusting process, the amplitude and phase of the DA1 signal (i.e., the first horizontally polarized echo signal, obtained after being processed by the DAC 1) and the DA2 signal (i.e., the second horizontally polarized echo signal, obtained after being processed by the DAC 2) are to be kept the same (i.e., the two horizontally polarized echo signals are adjusted to be in the same amplitude and phase based on the first amplitude and the first phase), the amplitude and phase of the DA3 signal (i.e., the first vertically polarized echo signal, obtained after being processed by the DAC 3) and the DA4 signal (i.e., the second vertically polarized echo signal, obtained after being processed by the DAC 4) are to be kept the same (i.e., the two vertically polarized echo signals are adjusted to be in the same amplitude and phase based on the second amplitude and phase), so as to ensure that the two antennas with the same polarization types, the equivalent position of the composite signal is located at the center of the concentric circles.
In step S103, the two horizontal polarization echo signals with the same amplitude and phase are up-converted and then input to the horizontal polarization antenna, and the two vertical polarization echo signals with the same amplitude and phase are up-converted and then input to the vertical polarization antenna, and the processed echo signals are sent to the radar to be detected through the horizontal polarization antenna and the vertical polarization antenna.
It should be understood that, in the embodiments of the present application, the signal processed by the FPGA may be accessed to the microwave link unit — up-conversion, that is, the intermediate frequency signal is up-converted into a radio frequency signal again; and accessing the radio frequency signal obtained after the up-conversion to an antenna unit, that is, inputting two paths of horizontal polarization echo signals (such as H1 and H2 in fig. 4) after the up-conversion processing to a horizontal polarization antenna (such as the horizontal polarization antenna H1 and the horizontal polarization antenna H2 in fig. 3), and inputting two paths of vertical polarization echo signals (such as V1 and V2 in fig. 4) to a vertical polarization antenna (such as the vertical polarization antenna V1 and the vertical polarization antenna V2 in fig. 3), so as to send the processed echo signals to a radar to be tested through the horizontal polarization antenna and the vertical polarization antenna.
It should be noted that in the embodiment of the present application, the polarization angle of the simulation signal can be changed by adjusting the amplitudes of the output signals of the two FPGAs, and in the simulation process, it is to be ensured that the signals accessed to the horizontal polarization antenna have the same amplitude and the same phase, and the two paths of signals accessed to the vertical polarization antenna have the same amplitude and the same phase, so as to output the full polarization radar target simulation signal with high isolation and controllable polarization angle.
According to the high-isolation radar polarization signal simulation method provided by the embodiment of the application, a radio frequency signal sent by a radar to be detected can be received, the radio frequency signal is converted into an intermediate frequency signal in a down-conversion mode, the intermediate frequency signal is preprocessed to obtain two horizontal polarization echo signals and two vertical polarization echo signals, the two horizontal polarization echo signals and the two vertical polarization echo signals are modulated to enable the two horizontal polarization echo signals and the two vertical polarization echo signals to be in equal-amplitude and in-phase, the two horizontal polarization echo signals in equal-amplitude and in-phase are subjected to up-conversion processing and then input to a horizontal polarization antenna, meanwhile, the two vertical polarization echo signals in equal-amplitude and in-phase are subjected to up-conversion processing and then input to a vertical polarization antenna, and the processed echo signals are sent to the radar to be detected through the horizontal polarization antenna and the vertical polarization antenna. Therefore, a high-isolation all-polarization radar target signal radiation source can be generated, and the measurement and calibration requirements of the polarization radar are met.
Next, a high-isolation radar polarization signal simulation device according to an embodiment of the present application is described with reference to the drawings.
Fig. 6 is a block diagram of a high-isolation radar polarization signal simulation apparatus according to an embodiment of the present application.
As shown in fig. 6, the high-isolation radar polarization signal simulation apparatus 10 includes: a receiving module 100, a modulation module 200 and a transmitting module 300.
The receiving module 100 is configured to receive a radio frequency signal sent by a radar to be detected, and down-convert the radio frequency signal into an intermediate frequency signal;
the modulation module 200 is configured to pre-process the intermediate frequency signal to obtain two horizontal polarization echo signals and two vertical polarization echo signals, and modulate the two horizontal polarization echo signals and the two vertical polarization echo signals, so that the two horizontal polarization echo signals and the two vertical polarization echo signals are in equal-amplitude and in-phase; and
the sending module 300 is configured to perform up-conversion processing on the two horizontal polarization echo signals with equal amplitude and in phase and then input the two horizontal polarization echo signals with equal amplitude and in phase to the horizontal polarization antenna, perform up-conversion processing on the two vertical polarization echo signals with equal amplitude and in phase and then input the two vertical polarization echo signals to the vertical polarization antenna, and send the processed echo signals to the radar to be detected through the horizontal polarization antenna and the vertical polarization antenna.
Optionally, the modulation module 200 is specifically configured to:
converting the intermediate frequency signal into a digital signal;
performing orthogonal digital down-mixing processing on the digital signal, and extracting to obtain an I path signal and a Q path signal;
and obtaining two paths of horizontal polarization echo signals and two paths of vertical polarization echo signals based on the I path signals and the Q path signals.
Optionally, the modulation module 200 is specifically configured to:
and adjusting the two paths of horizontal polarization echo signals to a preset amplitude phase based on the first amplitude and the first phase, and adjusting the two paths of vertical polarization echo signals to a preset amplitude phase based on the second amplitude and the second phase.
Optionally, the modulation module 200 is specifically configured to:
based on the digital signal, performing digital down-conversion processing on the digital signal at a preset sampling rate carrier frequency in a preset alternate-one inversion mode to obtain a processed signal;
performing anti-aliasing low-pass filtering on the processed signal to extract a useful signal;
IQ two-path separation processing is carried out on the basis of the useful signals to obtain I-path signals and Q-path signals after odd-even extraction.
Optionally, the preset sampling rate carrier frequency is determined by the a/D clock.
It should be noted that the above explanation of the embodiment of the high-isolation radar polarization signal simulation method is also applicable to the high-isolation radar polarization signal simulation apparatus of the embodiment, and is not repeated here.
According to the high-isolation radar polarization signal simulation device provided by the embodiment of the application, a radio frequency signal sent by a radar to be detected can be received, the radio frequency signal is converted into an intermediate frequency signal in a down-conversion mode, the intermediate frequency signal is preprocessed, two horizontal polarization echo signals and two vertical polarization echo signals are obtained, the two horizontal polarization echo signals and the two vertical polarization echo signals are modulated, the two horizontal polarization echo signals and the two vertical polarization echo signals are in equal-amplitude and in-phase, the two horizontal polarization echo signals in equal-amplitude and in-phase are subjected to up-conversion processing and then input to a horizontal polarization antenna, the two vertical polarization echo signals in equal-amplitude and in-phase are subjected to up-conversion processing and then input to a vertical polarization antenna, and the processed echo signals are sent to the radar to be detected through the horizontal polarization antenna and the vertical polarization antenna. Therefore, a high-isolation all-polarization radar target signal radiation source can be generated, and the measurement and calibration requirements of the polarization radar are met.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may include:
The processor 702, when executing the program, implements the high-isolation radar polarization signal simulation method provided in the above-described embodiments.
Further, the electronic device further includes:
a communication interface 703 for communication between the memory 701 and the processor 702.
A memory 701 for storing computer programs operable on the processor 702.
The memory 701 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
If the memory 701, the processor 702 and the communication interface 703 are implemented independently, the communication interface 703, the memory 701 and the processor 702 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.
Optionally, in a specific implementation, if the memory 701, the processor 702, and the communication interface 703 are integrated on a chip, the memory 701, the processor 702, and the communication interface 703 may complete mutual communication through an internal interface.
The processor 702 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.
The present embodiment also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the high-isolation radar polarization signal simulation method as above.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (12)
1. A high-isolation radar polarization signal simulation method is characterized by comprising the following steps:
receiving a radio frequency signal sent by a radar to be detected, and converting the radio frequency signal into an intermediate frequency signal in a down-conversion mode;
preprocessing the intermediate frequency signal to obtain two paths of horizontal polarization echo signals and two paths of vertical polarization echo signals, and modulating the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to enable the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to be in equal-amplitude and in-phase; and
the method comprises the steps that two horizontal polarization echo signals with the same amplitude and phase are subjected to up-conversion processing and then input to a horizontal polarization antenna, two vertical polarization echo signals with the same amplitude and phase are subjected to up-conversion processing and then input to a vertical polarization antenna, and the processed echo signals are sent to a radar to be detected through the horizontal polarization antenna and the vertical polarization antenna.
2. The method according to claim 1, wherein the preprocessing the if signal to obtain two horizontal polarization echo signals and two vertical polarization echo signals comprises:
converting the intermediate frequency signal into a digital signal;
performing orthogonal digital down-mixing processing on the digital signal, and extracting to obtain an I path signal and a Q path signal;
and obtaining the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals based on the I path signals and the Q path signals.
3. The method of claim 2, wherein said modulating said two horizontally polarized echo signals and said two vertically polarized echo signals such that said two horizontally polarized echo signals and said two vertically polarized echo signals are in equal amplitude and in phase comprises:
and adjusting the two paths of horizontal polarization echo signals to a preset amplitude phase based on a first amplitude and a first phase, and adjusting the two paths of vertical polarization echo signals to the preset amplitude phase based on a second amplitude and a second phase.
4. The method of claim 2, wherein said performing quadrature digital down-mixing on said digital signal comprises:
based on the digital signal, performing digital down-conversion processing on the digital signal at a preset sampling rate carrier frequency in a preset alternate-one inversion mode to obtain a processed signal;
performing anti-aliasing low-pass filtering on the processed signal to extract a useful signal;
and carrying out IQ two-path separation processing on the basis of the useful signal to obtain an I-path signal and a Q-path signal after odd-even extraction.
5. The method of claim 4, wherein the predetermined sample rate carrier frequency is determined by an A/D clock.
6. A high-isolation radar polarization signal simulation device is characterized by comprising:
the receiving module is used for receiving a radio frequency signal sent by a radar to be detected and converting the radio frequency signal into an intermediate frequency signal in a down-conversion mode;
the modulation module is used for preprocessing the intermediate frequency signal to obtain two paths of horizontal polarization echo signals and two paths of vertical polarization echo signals, and modulating the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to enable the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals to be in equal-amplitude and in-phase; and
and the sending module is used for inputting the two horizontal polarization echo signals with the same amplitude and phase to the horizontal polarization antenna after up-conversion processing, inputting the two vertical polarization echo signals with the same amplitude and phase to the vertical polarization antenna after up-conversion processing, and sending the processed echo signals to the radar to be detected through the horizontal polarization antenna and the vertical polarization antenna.
7. The apparatus of claim 6, wherein the modulation module is specifically configured to:
converting the intermediate frequency signal into a digital signal;
performing orthogonal digital down-mixing processing on the digital signal, and extracting to obtain an I path signal and a Q path signal;
and obtaining the two paths of horizontal polarization echo signals and the two paths of vertical polarization echo signals based on the I path signals and the Q path signals.
8. The apparatus of claim 7, wherein the modulation module is specifically configured to:
and adjusting the two paths of horizontal polarization echo signals to a preset amplitude phase based on a first amplitude and a first phase, and adjusting the two paths of vertical polarization echo signals to the preset amplitude phase based on a second amplitude and a second phase.
9. The apparatus of claim 7, wherein the modulation module is specifically configured to:
based on the digital signal, performing digital down-conversion processing on the digital signal at a preset sampling rate carrier frequency in a preset alternate-one inversion mode to obtain a processed signal;
performing anti-aliasing low-pass filtering on the processed signal to extract a useful signal;
and carrying out IQ two-path separation processing on the basis of the useful signal to obtain an I-path signal and a Q-path signal after odd-even extraction.
10. The apparatus of claim 9, wherein the preset sample rate carrier frequency is determined by an a/D clock.
11. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor executing the program to implement the high isolation radar polarization signal simulation method of any one of claims 1 to 5.
12. A computer-readable storage medium, on which a computer program is stored, the program being executable by a processor for implementing a high isolation radar polarization signal simulation method according to any one of claims 1 to 5.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058480A (en) * | 2016-06-01 | 2016-10-26 | 西安电子工程研究所 | Arbitrary polarized wave generation and calibration methods |
| CN107831479A (en) * | 2017-12-01 | 2018-03-23 | 北京润科通用技术有限公司 | A kind of analogue echoes method and system |
| US20200217951A1 (en) * | 2019-01-04 | 2020-07-09 | Korea Advanced Institute Of Science And Technology | High-resolution fully polarimetric frequency modulation continuous wave image radar system using rf switch and image processing method therefor |
-
2021
- 2021-12-24 CN CN202111594095.0A patent/CN113985377A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058480A (en) * | 2016-06-01 | 2016-10-26 | 西安电子工程研究所 | Arbitrary polarized wave generation and calibration methods |
| CN107831479A (en) * | 2017-12-01 | 2018-03-23 | 北京润科通用技术有限公司 | A kind of analogue echoes method and system |
| US20200217951A1 (en) * | 2019-01-04 | 2020-07-09 | Korea Advanced Institute Of Science And Technology | High-resolution fully polarimetric frequency modulation continuous wave image radar system using rf switch and image processing method therefor |
Non-Patent Citations (2)
| Title |
|---|
| 张黎明: "高性能数字接收机FPGA设计", 《电子产品世界》 * |
| 郭姣 等: "极化雷达目标射频信号仿真精度的分析", 《计算机仿真》 * |
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