CN114894028A - Array type arbitrary polarization calibration method and device - Google Patents
Array type arbitrary polarization calibration method and device Download PDFInfo
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- CN114894028A CN114894028A CN202210403606.4A CN202210403606A CN114894028A CN 114894028 A CN114894028 A CN 114894028A CN 202210403606 A CN202210403606 A CN 202210403606A CN 114894028 A CN114894028 A CN 114894028A
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- F41—WEAPONS
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Abstract
The invention provides an array random polarization calibration method and device, comprising the following steps: a signal receiving step: receiving array type arbitrary polarization signals; conditioning and selecting steps: converting the array arbitrary polarization signals into intermediate frequency signals with polarization characteristics; and (3) measurement and analysis steps: and extracting and fusing polarization features in the intermediate frequency signal. The invention realizes the analysis and processing of the array type arbitrary polarization target signals through the dual-polarization receiving antenna array unit module, the signal conditioning and mode selecting module, the polarization characteristic measuring and analyzing module and the polarization characteristic analyzing and calibrating software, ensures the accuracy of the extraction of the arbitrary polarization signal characteristics, and fills the blank that the traditional technology can not realize the calibration of the array type arbitrary polarization target.
Description
Technical Field
The invention relates to the technical field of array type arbitrary polarization target systems, in particular to an array type arbitrary polarization calibration method and device.
Background
The array type arbitrary polarization target system is used for simulating an arbitrary polarization electromagnetic environment faced by a weapon system, and whether the polarization characteristics are obvious or not directly influences the confidence coefficient of weapon system performance assessment and combat effectiveness assessment. The array arbitrary polarization calibration device is a special device for calibrating and correcting polarization characteristics and electromagnetic signal radiation positions of array arbitrary polarization signals and testing the angle simulation precision of the array arbitrary polarization signals. The performance index of the calibration device directly influences the polarization characteristics and the position accuracy of the array arbitrary polarization target, and has irreplaceable significance in an array arbitrary polarization target system.
Because the array type arbitrary polarization target system is constructed by combining the vertical polarization feed system and the horizontal polarization feed system, compared with a single feed system, the array type arbitrary polarization target system is more easily influenced by various factors such as environment, device batch, temperature drift and the like, and has higher requirements on the array type arbitrary polarization calibration device, particularly on the aspects of amplitude and phase testing precision and stability.
Chinese patent publication No. CN104659498A discloses a rotatable dual-antenna active polarization calibration device and a polarization calibration method thereof, in which polarization filters are additionally installed at the aperture surfaces of a receiving antenna and a transmitting antenna; by adopting the design of rotatable double antennas, different attitude combinations of the receiving antenna and the transmitting antenna can form different polarization combinations. Since each antenna in the designed rotatable dual-antenna active polarization calibrator PARC can be independently rotated, the combination of different polarization modes of PARC receiving antenna and transmitting antenna is controlled, and various forms of polarization scattering matrixes of PARC can be obtained.
For the related technologies, the inventor thinks that most of the conventional single-polarized target system calibration adopts a single-polarized antenna to receive array-type radiated radio-frequency signals, and this method cannot complete the calibration of any polarized radiation signals, and the single-polarized receiving antenna is not located at the radiation center, so that the measured polarization information has random errors.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an array type arbitrary polarization calibration method and device.
The invention provides an array random polarization calibration method, which comprises the following steps:
a signal receiving step: receiving array type arbitrary polarization signals;
conditioning and selecting steps: converting the array arbitrary polarization signals into intermediate frequency signals with polarization characteristics;
and (3) measurement and analysis steps: and extracting and fusing polarization features in the intermediate frequency signal.
Preferably, the conditioning selecting step comprises the steps of:
a switch selection step: selecting any polarization calibration mode;
and a radio frequency signal processing step: converting the array type arbitrary polarization signals into intermediate frequency signals with polarization characteristics according to the selected arbitrary polarization calibration mode;
and an intermediate frequency signal filtering step: and filtering the clutter interference of the intermediate frequency signal with the polarization characteristic.
Preferably, the arbitrary polarization calibration mode includes a static fast test mode or a rotational energy scan mode.
The invention provides an array type arbitrary polarization calibration device, which comprises the following modules:
the dual-polarized receiving antenna array unit module: receiving array type arbitrary polarization signals;
a signal conditioning mode selection module: converting the array arbitrary polarization signals into intermediate frequency signals with polarization characteristics;
polarization characteristic measurement analysis module: and extracting and fusing polarization features in the intermediate frequency signal.
Preferably, the signal conditioning mode selecting module comprises a switch, a radio frequency signal processing unit and an intermediate frequency signal filtering unit;
a switch is switched: selecting any polarization calibration mode;
the radio frequency signal processing unit: converting the array type arbitrary polarization signals into intermediate frequency signals with polarization characteristics according to the selected arbitrary polarization calibration mode;
intermediate frequency signal filtering unit: and filtering the clutter interference of the intermediate frequency signal with the polarization characteristic.
Preferably, the dual-polarized receiving antenna array unit module comprises a mechanical clamp and a dual-polarized receiving antenna.
The mechanical clamp is used for locking the dual-polarized receiving antenna and the signal conditioning and mode selecting module.
Preferably, the dual-polarized receiving antenna is a dual-polarized microwave antenna.
Preferably, the change-over switch is connected with the radio frequency signal processing unit;
the input port of the radio frequency signal processing unit is connected with the output port of the dual-polarized receiving antenna;
the radio frequency signal processing unit is connected with the intermediate frequency signal filtering unit;
the intermediate frequency signal filtering unit is connected with the polarization characteristic measurement and analysis module.
Preferably, the device further comprises polarization characteristic analysis and calibration software, wherein the polarization characteristic analysis and calibration software is provided with a human-computer interaction interface;
the human-computer interaction interface selects a module through a user control signal conditioning mode;
and the human-computer interaction interface displays the polarization characteristics extracted by the polarization characteristic measurement and analysis module.
Preferably, the polarization characteristic analysis calibration software is connected with a switch in the signal conditioning mode selection module through a cable to switch between a static fast test mode and a rotary energy scanning mode.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the array arbitrary polarization target signal analysis and processing are realized through the dual-polarization receiving antenna array unit module, the signal conditioning and mode selection module, the polarization characteristic measurement and analysis module and the polarization characteristic analysis and calibration software, so that the accuracy of arbitrary polarization signal characteristic extraction is ensured, and the blank that the conventional technology cannot realize the array arbitrary polarization target calibration is compensated;
2. the invention adopts a dual-polarized receiving antenna array distribution technology to realize a static rapid test mode and a rotary energy scanning mode, solves the technical problems of inherent deviation and high susceptibility to the influence of an internal field environment of the existing receiving device, improves the calibration confidence coefficient and ensures the reliability of an array type arbitrary polarization system;
3. according to the method, a signal conditioning and mode selection module is utilized, test items are formulated according to calibration requirements, extraction of any polarization characteristic information, balancing of any polarization cross channels, simulation precision testing of any polarization angle and difference compensation among any polarization channels are completed, extraction precision of any polarization characteristics is improved, and array type any polarization calibration efficiency is accelerated.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a top view of a dual-polarized receive antenna array element module;
FIG. 2 is a schematic diagram of a signal conditioning and mode selection module;
fig. 3 is a connection relationship diagram of all the mating units.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The embodiment of the invention discloses an array type arbitrary polarization calibration method, which comprises the following steps as shown in figures 1 and 2:
a signal receiving step: receiving the array type arbitrary polarization signals.
Conditioning and selecting steps: and converting the array arbitrary polarization signals into intermediate frequency signals with polarization characteristics.
The conditioning selection step comprises the steps of:
a switch selection step: and selecting an arbitrary polarization calibration mode. The arbitrary polarization calibration mode includes a static fast test mode or a rotational energy scan mode.
And a radio frequency signal processing step: and converting the array random polarization signals into intermediate frequency signals with polarization characteristics according to the selected random polarization calibration mode.
And an intermediate frequency signal filtering step: and filtering the clutter interference of the intermediate frequency signal with the polarization characteristic.
And (3) measurement and analysis steps: and extracting and fusing polarization features in the intermediate frequency signal.
The embodiment of the invention also discloses an array type arbitrary polarization calibration device, which comprises a dual-polarization receiving antenna array unit module, a signal conditioning and mode selecting module, a polarization characteristic measuring and analyzing module and polarization characteristic analyzing and calibrating software as shown in fig. 1 and fig. 2.
The dual-polarized receiving antenna array unit module: receiving the array type arbitrary polarization signals. The dual-polarized receiving antenna array unit module comprises a mechanical clamp and a dual-polarized receiving antenna. The mechanical clamp is used for locking the dual-polarization receiving antenna and the signal conditioning and mode selecting module. The dual-polarized receiving antenna is a dual-polarized microwave antenna.
Fig. 1 is a schematic top view of a supporting dual-polarized receiving antenna array unit module according to the present invention. The antenna array unit module consists of five dual-polarized microwave antennas and is installed on a mechanical clamp, and the middle antenna is used for collecting array radiation signals with any polarization and outputting the collected signals to the signal conditioning and mode selecting module. And the other antennas are used for measuring whether the radiation position of any polarization characteristic signal is accurate or not. The dual-polarized receiving antenna array unit module comprises five dual-polarized receiving antennas. The antenna array unit module is composed of five dual-polarized microwave antennas. The dual-polarized receiving antenna array unit module comprises a mechanical clamp and a dual-polarized receiving antenna. The dual polarized receive antenna receives vertical and horizontal dual polarized microwave signals radiated through space. The mechanical clamp can be used for locking a dual-polarized receiving antenna on the clamp and a signal conditioning and mode selecting module fixed inside the clamp. And the mechanical clamp locks the radio frequency signal processing unit of the signal conditioning and mode selecting module to condition the microwave signal received by the dual-polarized receiving antenna.
A signal conditioning mode selection module: and converting the array arbitrary polarization signals into intermediate frequency signals with polarization characteristics.
The signal conditioning mode selection module comprises a selector switch, a radio frequency signal processing unit and an intermediate frequency signal filtering unit. A switch is switched: selecting any polarization calibration mode; the radio frequency signal processing unit: and converting the array random polarization signals into intermediate frequency signals with polarization characteristics according to the selected random polarization calibration mode. Intermediate frequency signal filtering unit: and filtering the clutter interference of the intermediate frequency signal with the polarization characteristic.
The dual-polarized signal output port of the antenna is connected with the input port of the signal conditioning and mode selecting module (the input interface of the radio frequency signal processing unit).
As shown in fig. 2 and 3, fig. 2 is a schematic diagram of a signal conditioning and mode selection module according to the present invention. The signal conditioning and mode selecting module is composed of 3 electric control microwave switches, receives signals output by the dual-polarization receiving antenna array unit, and conditions input signals according to a selected mode. The electric control microwave switch is an internal component of the signal conditioning and mode selecting module and is a radio frequency microwave switch. Fig. 3 is a connection diagram of all the components of the kit according to the present invention.
The signal conditioning and mode selecting module comprises a radio frequency signal processing unit, a selector switch and an intermediate frequency signal filtering unit, and is used for completing selection of any polarization calibration mode and filtering of intermediate frequency signal clutter interference. The signal conditioning and mode selection module can select any polarization signal calibration mode. The signal conditioning and mode selection module has two polarization characteristic test modes, namely a static rapid test mode and a rotary energy scanning mode, and improves the array type arbitrary polarization calibration efficiency on the basis of accurately calibrating the polarization characteristics.
The change-over switch is connected with the radio frequency signal processing unit and is used for realizing the selection of any polarization calibration mode; the calibration mode is divided into a static fast test mode and a rotational energy scanning mode. The mode selection is realized by controlling the radio frequency switch. The radio frequency signal processing unit is connected with the intermediate frequency signal filtering unit and is used for converting the radio frequency signal into an intermediate frequency signal; the radio frequency signal is a signal output to the radio frequency signal processing unit by the changeover switch. And the intermediate frequency signal filtering unit is used for filtering out the clutter interference of the intermediate frequency signal. The intermediate frequency signal after filtering clutter interference is transmitted into a polarization characteristic measuring and analyzing module through a radio frequency cable.
Polarization characteristic measurement analysis module: and extracting and fusing polarization features in the intermediate frequency signal.
And the polarization characteristic measurement and analysis module is connected with the intermediate frequency signal filtering unit in the signal conditioning and mode selection module and is used for extracting and fusing the polarization characteristics of the signals received by the dual-polarized antenna. The polarization characteristic measurement and analysis module can extract and fuse the polarization characteristics of the dual-polarized antenna receiving signals. The received signal of the dual-polarized antenna is an array target signal with any polarization characteristic.
The polarization characteristic analysis and calibration software controls the signal conditioning and mode selecting module and the polarization characteristic measuring and analyzing module, has two polarization characteristic testing modes, a static rapid testing mode and a rotary energy scanning mode, and improves the array type arbitrary polarization calibration efficiency on the basis of accurately calibrating the polarization characteristics. The static rapid test mode adopts two receiving ridge sheets of vertical polarization and horizontal polarization of the dual-polarized antenna for testing; the rotational energy scan mode uses one receive ridge of a dual polarized antenna for testing.
The change-over switch is connected with the radio frequency signal processing unit; the input port of the radio frequency signal processing unit is connected with the output port of the dual-polarized receiving antenna; the radio frequency signal processing unit is connected with the intermediate frequency signal filtering unit; the intermediate frequency signal filtering unit is connected with the polarization characteristic measurement and analysis module.
The polarization characteristic analysis calibration software is provided with a human-computer interaction interface. The man-machine interaction interface selects a module through a user control signal conditioning mode; and the man-machine interaction interface displays the polarization characteristics extracted by the polarization characteristic measurement and analysis module. The polarization characteristic analysis calibration software is connected with a selector switch in the signal conditioning mode selection module through a cable to switch between a static rapid test mode and a rotary energy scanning mode.
The polarization characteristic analysis and calibration software has a human-computer interaction interface, and realizes the control of a signal conditioning and mode selection module by a user and the display of the polarization characteristics extracted by the polarization characteristic measurement and analysis module. The polarization characteristic analysis and calibration software is connected with the polarization characteristic measurement and analysis module through a network cable, and tcp/ip protocol communication is adopted. The polarization characteristic analysis and calibration software is connected with a selector switch in the signal conditioning and mode selection module through a cable and is used for realizing the switching between a static rapid test mode and a rotary energy scanning mode.
The array type arbitrary polarization calibration device has two polarization characteristic test modes, a static rapid test mode and a rotary energy scanning mode, and improves the array type arbitrary polarization calibration efficiency on the basis of accurately calibrating the polarization characteristics. Static fast test mode: the method has the advantages of high testing speed, small movement range and the like, but the phase difference between vertical polarization signals and horizontal polarization signals cannot be accurately measured. Rotational energy scan mode: the phase difference between the vertical polarization signal and the horizontal polarization signal can be accurately measured, and the amplitude distribution of the polarization characteristics in the space can be accurately measured.
The array type arbitrary polarization calibration device is universal and good in stability. The array type arbitrary polarization calibration device provided by the invention selects an arbitrary polarization calibration mode according to needs, outputs radiation signals received by dual-polarization receiving antenna array units to a signal conditioning and mode selection module after being received by the dual-polarization receiving antenna array units, and realizes the extraction of polarization information by utilizing a polarization characteristic measurement and analysis module and calibration software.
The invention fills the blank that the traditional technology can not realize array type arbitrary polarization target calibration; a dual-polarization receiving antenna array distribution technology is adopted to realize a static rapid test mode and a rotary energy scanning mode, solve the technical problems of inherent deviation and high susceptibility to internal field environment of the existing receiving device, improve the calibration confidence coefficient and ensure the reliability of an array type arbitrary polarization system.
The implementation process of the array type arbitrary polarization calibration device comprises the following steps:
the method comprises the following steps that firstly, a dual-polarized receiving antenna array unit module is arranged in the center of a rotary table, a central dual-polarized antenna is ensured to be in the center of rotation, two orthogonal antenna ridgeplates are respectively arranged on a vertical plane and a horizontal plane, and the dual-polarized receiving antenna array unit module is connected with a signal conditioning and mode selecting module through a radio frequency cable. The dual-polarized receiving antenna is installed on the rotary table through the mechanical clamp, so that the dual-polarized receiving antenna array unit module is ensured to be positioned in the center of the rotary table, and the mechanical precision is ensured by the mechanical clamp. The mechanical clamp is mounted on the turntable.
And step two, setting a polarization characteristic analysis and calibration software control signal conditioning and mode selection module, driving the control signal conditioning and mode selection module through the polarization characteristic analysis and calibration software to realize gating and conditioning of signals, setting the current calibration mode to be a static rapid test mode or a rotary energy scanning mode through the polarization characteristic analysis and calibration software, and outputting signals to a polarization characteristic measurement and analysis module through a radio frequency cable. The polarization characteristic measuring and analyzing module and the signal conditioning and mode selecting module are connected through a radio frequency cable and output an intermediate frequency signal with polarization characteristics to the polarization characteristic measuring and analyzing module.
And step three, the polarization characteristic analysis and calibration software is communicated with the polarization characteristic measurement and analysis module through the network port, analyzes the polarization information transmitted by the radio frequency cable, and extracts the polarization characteristics in the information.
And step four, formulating test items according to the calibration requirements, completing extraction of any polarization characteristic information, balancing of any polarization cross channel, simulation precision test of any polarization angle and difference compensation among any polarization channels, improving extraction precision of any polarization characteristics and accelerating array type any polarization calibration efficiency. The calibration requirements are: the current polarization characteristics (including circular polarization/linear polarization/elliptical polarization) of the target system with any polarization.
The invention relates in particular to arbitrary polarization target system calibration. The array type arbitrary polarization calibration device mainly comprises a dual-polarization receiving antenna array unit module, a signal conditioning and mode selecting module, a polarization characteristic measuring and analyzing module, polarization characteristic analyzing and calibrating software and a mechanical clamp. The array random polarization calibration device provided by the invention has the advantages that: firstly, the array arbitrary polarization target signal analysis and processing are realized through a dual-polarization receiving antenna array unit module, a signal conditioning and mode selecting module, a polarization characteristic measuring and analyzing module and polarization characteristic analyzing and calibrating software, the accuracy of arbitrary polarization signal characteristic extraction is ensured, and the blank that the conventional technology cannot realize the array arbitrary polarization characteristic calibration is compensated. Through an array target system consisting of hundreds of dual-polarized antennas, not only can target signals with any polarization characteristics be radiated, but also the target position can be rapidly changed. And secondly, a dual-polarization receiving antenna array distribution technology is adopted, a static rapid test mode and a rotary energy scanning mode are realized, the technical problems that the existing receiving device has inherent deviation and is easily influenced by an internal field environment to a great extent are solved, the calibration confidence coefficient is improved, and the reliability of an array type arbitrary polarization system is ensured. And thirdly, a signal conditioning and mode selecting module is utilized to formulate a test item according to the calibration requirement, so that the extraction of any polarization characteristic information, the balance of any polarization cross channel, the simulation precision test of any polarization angle and the difference compensation among any polarization channels are completed, the extraction precision of any polarization characteristic is improved, and the array type any polarization calibration efficiency is accelerated.
Those skilled in the art will appreciate that, in addition to implementing the system and its various devices, modules, units provided by the present invention as pure computer readable program code, the system and its various devices, modules, units provided by the present invention can be fully implemented by logically programming method steps in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units included in the system for realizing various functions can also be regarded as structures in the hardware component; means, modules, units for performing the various functions may also be regarded as structures within both software modules and hardware components for performing the method.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. An array random polarization calibration method is characterized by comprising the following steps:
a signal receiving step: receiving array type arbitrary polarization signals;
conditioning and selecting steps: converting the array arbitrary polarization signals into intermediate frequency signals with polarization characteristics;
and (3) measurement and analysis steps: and extracting and fusing polarization features in the intermediate frequency signal.
2. The array arbitrary polarization calibration method of claim 1, wherein the conditioning selection step comprises the steps of:
a switch selection step: selecting any polarization calibration mode;
and a radio frequency signal processing step: converting the array type arbitrary polarization signals into intermediate frequency signals with polarization characteristics according to the selected arbitrary polarization calibration mode;
and an intermediate frequency signal filtering step: and filtering the clutter interference of the intermediate frequency signal with the polarization characteristic.
3. The array-type arbitrary polarization calibration method according to claim 1, wherein the arbitrary polarization calibration mode comprises a static fast test mode or a rotational energy scan mode.
4. An array random polarization calibration device, which is characterized in that the array random polarization calibration method of any one of claims 1 to 3 is applied, and comprises the following modules:
the dual-polarized receiving antenna array unit module: receiving array type arbitrary polarization signals;
a signal conditioning mode selection module: converting the array arbitrary polarization signals into intermediate frequency signals with polarization characteristics;
polarization characteristic measurement analysis module: and extracting and fusing polarization features in the intermediate frequency signal.
5. The array random polarization calibration device of claim 4, wherein the signal conditioning mode selection module comprises a switch, a radio frequency signal processing unit and an intermediate frequency signal filtering unit;
a switch is switched: selecting any polarization calibration mode;
the radio frequency signal processing unit: converting the array type arbitrary polarization signals into intermediate frequency signals with polarization characteristics according to the selected arbitrary polarization calibration mode;
intermediate frequency signal filtering unit: and filtering the clutter interference of the intermediate frequency signal with the polarization characteristic.
6. The array random polarization calibration device of claim 4, wherein the dual-polarized receive antenna array element modules comprise mechanical clamps and dual-polarized receive antennas.
The mechanical clamp is used for locking the dual-polarized receiving antenna and the signal conditioning and mode selecting module.
7. The array arbitrary polarization calibration device of claim 6, wherein the dual polarized receiving antenna is a dual polarized microwave antenna.
8. The array random polarization calibration device of claim 6, wherein the switch is connected to a radio frequency signal processing unit;
the input port of the radio frequency signal processing unit is connected with the output port of the dual-polarized receiving antenna;
the radio frequency signal processing unit is connected with the intermediate frequency signal filtering unit;
the intermediate frequency signal filtering unit is connected with the polarization characteristic measurement and analysis module.
9. The array random polarization calibration device of claim 4, further comprising polarization feature analysis calibration software, wherein the polarization feature analysis calibration software has a human-computer interface;
the human-computer interaction interface selects a module through a user control signal conditioning mode;
and the human-computer interaction interface displays the polarization characteristics extracted by the polarization characteristic measurement and analysis module.
10. The array random polarization calibration device of claim 4, wherein the polarization characteristic analysis calibration software is connected to a switch in the signal conditioning mode selection module through a cable to switch between a static fast test mode and a rotational energy scan mode.
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