CN111983576A - Mutual coupling effect-based automatic calibration method and device for secondary radar phased array - Google Patents
Mutual coupling effect-based automatic calibration method and device for secondary radar phased array Download PDFInfo
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- CN111983576A CN111983576A CN202010846600.5A CN202010846600A CN111983576A CN 111983576 A CN111983576 A CN 111983576A CN 202010846600 A CN202010846600 A CN 202010846600A CN 111983576 A CN111983576 A CN 111983576A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4026—Antenna boresight
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Abstract
The invention discloses a mutual coupling effect-based automatic calibration method and device for a secondary radar phased array. Obtaining the amplitude phase difference between each received signal and the standard signal generated by the transmitting source, and then taking the interrogation channel with the minimum amplitude as a transmitting reference channel to adjust the amplitude and the phase of other interrogation channels. The receiving calibration process comprises the steps that a control channel transmits a test signal, a comparison channel and other inquiry channels sequentially receive the test signal, the amplitude difference between a received signal acquired by each inquiry channel and a received signal acquired by the comparison channel is calculated, the inquiry channel corresponding to the received signal with the minimum amplitude is selected as a receiving reference channel, and the amplitude and the phase of the other inquiry channels are adjusted. The invention can automatically finish the emission calibration and the receiving calibration of each radio frequency channel.
Description
Technical Field
The invention relates to the technical field of antenna calibration, in particular to a mutual coupling effect-based automatic calibration method and device for a secondary radar phased array.
Background
In the using process of the secondary radar phased array system, the amplitude-phase characteristics among the radio frequency channels are changed due to the aging of devices, the replacement of parts and the like, so that the detection precision of the secondary radar phased array system is influenced. Therefore, the radio frequency channels of the phased array system need to be periodically subjected to amplitude and phase calibration to ensure the detection performance of the phased array system.
The conventional calibration method needs an additional external field measuring device, is complex to operate, needs a certain professional knowledge of maintenance personnel, and is not beneficial to product maintenance after equipment delivery.
Disclosure of Invention
The invention aims to provide a mutual coupling effect-based automatic calibration method for a secondary radar phased array antenna, which can automatically finish the transmitting calibration and the receiving calibration of each radio frequency channel.
In order to solve the technical problems, the invention adopts a technical scheme that: the method for automatically calibrating the secondary radar phased array based on the mutual coupling effect is provided, the secondary radar phased array antenna is provided with 1 control channel and multiple inquiry channels, and the method for automatically calibrating the secondary radar phased array antenna comprises the following steps:
s1: receiving a transmitting calibration instruction or a receiving calibration instruction;
s2: transmitting and calibrating the multiple interrogation channels according to the transmitting and calibrating instruction or receiving and calibrating the multiple interrogation channels according to the receiving and calibrating instruction;
wherein the step of calibrating the transmission of the multiple interrogation channels comprises:
s11: sorting the plurality of interrogation channels in a first order;
s12: sequentially starting the inquiry channels according to the sequencing order, transmitting a first test signal, and simultaneously controlling the control channel to enter a receiving mode, wherein when the current inquiry channel is started, other inquiry channels are all closed;
s13: calculating the amplitude difference between each received signal acquired by the control channel and a standard signal generated by an emission source;
s14: selecting the interrogation channel corresponding to the receiving signal with the minimum amplitude as a transmitting reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels to keep the amplitude and the phase of each interrogation channel consistent with the transmitting reference channel;
the step of performing receive calibration on the multiple interrogation channels comprises:
s21: the multi-path inquiry channels are sequenced according to a second sequence, and the inquiry channel which is sequenced first is used as a comparison channel;
s22: starting a control channel, transmitting a second test signal, controlling a comparison channel to be started and enter a receiving mode, and starting an inquiry channel from an inquiry channel which is sequenced in the second sequence and entering the receiving mode according to the sequencing sequence, wherein when the current inquiry channel is started, other inquiry channels except the comparison channel are all closed;
s23: calculating the amplitude-phase difference between the received signals acquired by each inquiry channel and the received signals acquired by the comparison channel;
s24: and selecting the interrogation channel corresponding to the received signal with the minimum amplitude as a receiving reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels so that the amplitude and the phase of each interrogation channel are consistent with those of the receiving reference channel.
Preferably, the first sequence is the same as the second sequence.
Preferably, the first test signal is the same as the second test signal.
In order to solve the technical problem, the invention adopts another technical scheme that: the utility model provides a secondary radar phased array automatic calibration device based on mutual coupling effect, secondary radar phased array antenna has 1 way control channel and multichannel inquiry passageway, secondary radar phased array antenna automatic calibration device includes instruction receiving module, transmission calibration module and receipt calibration module:
the instruction receiving module is used for receiving a transmitting calibration instruction or a receiving calibration instruction;
the transmitting calibration module is used for transmitting calibration to the multiple interrogation channels according to the transmitting calibration instruction;
the receiving calibration module is used for receiving calibration on the multiple paths of inquiry channels according to the receiving calibration instruction;
the transmitting calibration module comprises a first sequencing unit, a first control unit, a first calculation unit and a transmitting calibration unit, and the receiving calibration module comprises a second sequencing unit, a second control unit, a second calculation unit and a receiving calibration unit;
the first ordering unit is used for ordering the multiple inquiry channels according to a first order;
the first control unit is used for sequentially starting the inquiry channels according to the sequencing order, transmitting a first test signal and simultaneously controlling the control channels to enter a receiving mode, wherein when the current inquiry channel is started, other inquiry channels are all closed;
the first calculating unit is used for calculating the amplitude difference between each received signal acquired by the control channel and a standard signal generated by a transmitting source;
the transmitting calibration unit is used for selecting the interrogation channel corresponding to the receiving signal with the minimum amplitude as a transmitting reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels to keep the amplitude and the phase of each interrogation channel consistent with the transmitting reference channel;
the second sorting unit is used for sorting the multiple inquiry channels according to a second sequence and taking the first sorted inquiry channel as a comparison channel;
the second control unit is used for starting the control channel, transmitting a second test signal, controlling the comparison channel to be started and enter a receiving mode, and simultaneously starting the inquiry channels in sequence from the second inquiry channel in sequence according to the sequencing order and entering the receiving mode, wherein when the current inquiry channel is started, other inquiry channels except the comparison channel are all closed;
the second calculating unit is used for calculating the amplitude-phase difference between the received signal acquired by each inquiry channel and the received signal acquired by the comparison channel;
the receiving calibration unit is used for selecting the interrogation channel corresponding to the receiving signal with the minimum amplitude as a receiving reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels, so that the amplitude and the phase of each interrogation channel are consistent with the receiving reference channel.
Preferably, the first sequence is the same as the second sequence.
Preferably, the first test signal is the same as the second test signal.
Different from the prior art, the invention has the beneficial effects that: the external field measuring device is not needed, the operation is simple, and the maintenance cost of the external field is reduced.
Drawings
FIG. 1 is a schematic flow chart of a mutual coupling effect-based automatic calibration method for a secondary radar phased array according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a specific process for calibration of transmission for multiple interrogation channels;
FIG. 3 is a schematic diagram of a specific process for calibration of the reception of multiple interrogation channels;
fig. 4 is a block diagram of an architecture of a mutual coupling effect-based secondary radar phased array automatic calibration apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in the present embodiment, the secondary radar phased array has 1-way control channel and multiple interrogation channels. The secondary radar phased-array antenna is composed of a plurality of antenna elements which are arranged at equal intervals, each antenna element is composed of an inquiry dipole and a control dipole which are vertically arranged, and each inquiry dipole is connected with one TR module to form one inquiry channel; all control dipoles are connected with a 1-minute N power divider, and the other end of the power divider is connected with a TR module. Therefore, the N-element secondary radar phased-array antenna consists of N inquiry channels and one control channel. In the secondary radar, a control channel generates an omnidirectional beam, an inquiry channel generates a directional beam, and therefore amplitude and phase calibration is mainly performed on the inquiry channel.
The mutual coupling effect-based automatic calibration method for the secondary radar phased array comprises the following steps:
s1: receiving a transmitting calibration instruction or a receiving calibration instruction;
s2: and carrying out transmitting calibration on the multiple interrogation channels according to the transmitting calibration instruction or carrying out receiving calibration on the multiple interrogation channels according to the receiving calibration instruction.
Wherein, the step of calibrating the emission of the multiple interrogation channels comprises:
s11: sorting the plurality of interrogation channels in a first order;
s12: sequentially starting the inquiry channels according to the sequencing order, transmitting a first test signal, and simultaneously controlling the control channel to enter a receiving mode, wherein when the current inquiry channel is started, other inquiry channels are all closed;
s13: calculating the amplitude difference between each received signal acquired by the control channel and a standard signal generated by the emission source;
s14: and selecting the interrogation channel corresponding to the receiving signal with the minimum amplitude as a transmission reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels to keep the amplitude and the phase of each interrogation channel consistent with the transmission reference channel.
The control channel is coupled by the antenna and collects the first test signal transmitted by each interrogation channel. Because the coupling coefficients between the control channel and each interrogation channel are the same, the interrogation channels can be balanced after the amplitude and the phase of each interrogation channel are adjusted.
The process of calibrating the reception of the multiple interrogation channels is as follows:
s21: the multiple inquiry channels are sequenced according to a second sequence, and the inquiry channel which is sequenced first is used as a comparison channel;
s22: starting a control channel, transmitting a second test signal, controlling a comparison channel to be started and enter a receiving mode, and starting an inquiry channel from an inquiry channel which is sequenced in the second sequence and entering the receiving mode according to the sequencing sequence, wherein when the current inquiry channel is started, other inquiry channels except the comparison channel are all closed;
s23: calculating the amplitude-phase difference between the received signal acquired by each inquiry channel and the received signal acquired by the comparison channel;
s24: and selecting the interrogation channel corresponding to the received signal with the minimum amplitude as a receiving reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels so that the amplitude and the phase of each interrogation channel are consistent with those of the receiving reference channel.
And each inquiry channel and each comparison channel are coupled by the antenna and then acquire a second test signal transmitted by the control channel. Because the coupling coefficients between the comparison channel and each interrogation channel are the same, the interrogation channels can be balanced after the amplitude and the phase of each interrogation channel are adjusted.
In the present embodiment, the first order is the same as the second order. The first test signal and the second test signal may also be identical.
Referring to fig. 4, in the present embodiment, the secondary radar phased array has 1-way control channel and multiple interrogation channels. The secondary radar phased-array antenna is composed of a plurality of antenna elements which are arranged at equal intervals, each antenna element is composed of an inquiry dipole and a control dipole which are vertically arranged, and each inquiry dipole is connected with one TR module to form one inquiry channel; all control dipoles are connected with a 1-minute N power divider, and the other end of the power divider is connected with a TR module. Therefore, the N-element secondary radar phased-array antenna consists of N inquiry channels and one control channel. In the secondary radar, a control channel generates an omnidirectional beam, an inquiry channel generates a directional beam, and therefore amplitude and phase calibration is mainly performed on the inquiry channel.
The mutual coupling effect-based secondary radar phased array automatic calibration device of the embodiment comprises an instruction receiving module 1, a transmitting calibration module 2 and a receiving calibration module 3:
the instruction receiving module 1 is used for receiving a transmitting calibration instruction or a receiving calibration instruction;
the emission calibration module 2 is used for carrying out emission calibration on the multiple interrogation channels according to the emission calibration instruction;
and the receiving calibration module 3 is used for receiving calibration on the multiple inquiry channels according to the receiving calibration instruction.
The transmission calibration module 2 includes a first sequencing unit 21, a first control unit 22, a first calculation unit 23 and a transmission calibration unit 24, and the reception calibration module 3 includes a second sequencing unit 31, a second control unit 32, a second calculation unit 33 and a reception calibration unit 34;
the first sequencing unit 21 is configured to sequence the multiple interrogation channels in a first order;
the first control unit 22 is configured to sequentially start the query channels according to the sorting order, transmit a first test signal, and control the control channels to enter a receiving mode, where when the current query channel is started, other query channels are all closed;
the first calculating unit 23 is configured to calculate an amplitude difference between each received signal acquired by the control channel and a standard signal generated by the transmission source;
the transmission calibration unit 24 is configured to select the interrogation channel corresponding to the received signal with the smallest amplitude as the transmission reference channel, and adjust the amplitude and phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels, so that the amplitude and phase of each interrogation channel are consistent with the transmission reference channel.
The control channel is coupled by the antenna and collects the first test signal transmitted by each interrogation channel. Because the coupling coefficients between the control channel and each interrogation channel are the same, the interrogation channels can be balanced after the amplitude and the phase of each interrogation channel are adjusted.
The second sorting unit 31 is configured to sort the multiple query channels according to a second order, and use the query channel sorted first as a comparison channel;
the second control unit 32 is configured to open the control channel, transmit a second test signal, control the comparison channel to open and enter the receiving mode, and simultaneously sequentially open the query channels from the second query channel in the sorting order and enter the receiving mode, where when the current query channel is opened, other query channels except the comparison channel are all closed;
the second calculating unit 33 is configured to calculate an amplitude-phase difference between the received signal acquired by each interrogation channel and the received signal acquired by the comparison channel;
the receiving calibration unit 34 is configured to select the interrogation channel corresponding to the received signal with the smallest amplitude as a receiving reference channel, and adjust the amplitude and phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels, so that the amplitude and phase of each interrogation channel are consistent with the receiving reference channel.
And each inquiry channel and each comparison channel are coupled by the antenna and then acquire a second test signal transmitted by the control channel. Because the coupling coefficients between the comparison channel and each interrogation channel are the same, the interrogation channels can be balanced after the amplitude and the phase of each interrogation channel are adjusted.
In the present embodiment, the first order is the same as the second order. The first test signal and the second test signal may also be identical.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (6)
1. A secondary radar phased array automatic calibration method based on mutual coupling effect is provided, the secondary radar phased array antenna is provided with 1 path of control channels and a plurality of paths of inquiry channels, and the secondary radar phased array antenna automatic calibration method is characterized by comprising the following steps:
s1: receiving a transmitting calibration instruction or a receiving calibration instruction;
s2: transmitting and calibrating the multiple interrogation channels according to the transmitting and calibrating instruction or receiving and calibrating the multiple interrogation channels according to the receiving and calibrating instruction;
wherein the step of calibrating the transmission of the multiple interrogation channels comprises:
s11: sorting the plurality of interrogation channels in a first order;
s12: sequentially starting the inquiry channels according to the sequencing order, transmitting a first test signal, and simultaneously controlling the control channel to enter a receiving mode, wherein when the current inquiry channel is started, other inquiry channels are all closed;
s13: calculating the amplitude difference between each received signal acquired by the control channel and a standard signal generated by an emission source;
s14: selecting the interrogation channel corresponding to the receiving signal with the minimum amplitude as a transmitting reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels to keep the amplitude and the phase of each interrogation channel consistent with the transmitting reference channel;
the step of performing receive calibration on the multiple interrogation channels comprises:
s21: the multi-path inquiry channels are sequenced according to a second sequence, and the inquiry channel which is sequenced first is used as a comparison channel;
s22: starting a control channel, transmitting a second test signal, controlling a comparison channel to be started and enter a receiving mode, and starting an inquiry channel from an inquiry channel which is sequenced in the second sequence and entering the receiving mode according to the sequencing sequence, wherein when the current inquiry channel is started, other inquiry channels except the comparison channel are all closed;
s23: calculating the amplitude-phase difference between the received signals acquired by each inquiry channel and the received signals acquired by the comparison channel;
s24: and selecting the interrogation channel corresponding to the received signal with the minimum amplitude as a receiving reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels so that the amplitude and the phase of each interrogation channel are consistent with those of the receiving reference channel.
2. The quadratic radar phased array auto-calibration method according to claim 1, wherein the first order is the same as the second order.
3. The secondary radar phased array auto-calibration method of claim 1, wherein the first test signal is the same as the second test signal.
4. The utility model provides a secondary radar phased array automatic calibration device based on mutual coupling effect, secondary radar phased array antenna has 1 way control channel and multichannel inquiry passageway, its characterized in that, secondary radar phased array antenna automatic calibration device includes instruction receiving module, transmission calibration module and receipt calibration module:
the instruction receiving module is used for receiving a transmitting calibration instruction or a receiving calibration instruction;
the transmitting calibration module is used for transmitting calibration to the multiple interrogation channels according to the transmitting calibration instruction;
the receiving calibration module is used for receiving calibration on the multiple paths of inquiry channels according to the receiving calibration instruction;
the transmitting calibration module comprises a first sequencing unit, a first control unit, a first calculation unit and a transmitting calibration unit, and the receiving calibration module comprises a second sequencing unit, a second control unit, a second calculation unit and a receiving calibration unit;
the first ordering unit is used for ordering the multiple inquiry channels according to a first order;
the first control unit is used for sequentially starting the inquiry channels according to the sequencing order, transmitting a first test signal and simultaneously controlling the control channels to enter a receiving mode, wherein when the current inquiry channel is started, other inquiry channels are all closed;
the first calculating unit is used for calculating the amplitude difference between each received signal acquired by the control channel and a standard signal generated by a transmitting source;
the transmitting calibration unit is used for selecting the interrogation channel corresponding to the receiving signal with the minimum amplitude as a transmitting reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels to keep the amplitude and the phase of each interrogation channel consistent with the transmitting reference channel;
the second sorting unit is used for sorting the multiple inquiry channels according to a second sequence and taking the first sorted inquiry channel as a comparison channel;
the second control unit is used for starting the control channel, transmitting a second test signal, controlling the comparison channel to be started and enter a receiving mode, and simultaneously starting the inquiry channels in sequence from the second inquiry channel in sequence according to the sequencing order and entering the receiving mode, wherein when the current inquiry channel is started, other inquiry channels except the comparison channel are all closed;
the second calculating unit is used for calculating the amplitude-phase difference between the received signal acquired by each inquiry channel and the received signal acquired by the comparison channel;
the receiving calibration unit is used for selecting the interrogation channel corresponding to the receiving signal with the minimum amplitude as a receiving reference channel, and adjusting the amplitude and the phase of each interrogation channel according to the amplitude-phase difference corresponding to other interrogation channels, so that the amplitude and the phase of each interrogation channel are consistent with the receiving reference channel.
5. The secondary radar phased array auto-calibration device according to claim 4, wherein the first order is the same as the second order.
6. The secondary radar phased array auto-calibration device according to claim 4, wherein the first test signal is the same as the second test signal.
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| CN115586501A (en) * | 2022-11-25 | 2023-01-10 | 四川九洲电器集团有限责任公司 | FPGA-based multichannel baseband data amplitude-phase compensation implementation method |
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