CN113745852A - Communication method of meteor trail communication system and conformal array antenna - Google Patents
Communication method of meteor trail communication system and conformal array antenna Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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Abstract
The invention provides a communication method of a meteor trail communication system and a conformal array antenna, wherein the method is applied to the conformal array antenna and comprises at least one conformal antenna array, each conformal antenna array comprises a plurality of patch array sub-antennas, when signals are received, electromagnetic wave signals respectively received by the patch array sub-antennas of the conformal antenna array are obtained, received signal preprocessing is carried out on the electromagnetic wave signals, a plurality of groups of digital signals are obtained, and digital beam forming processing and demodulation processing are carried out on the plurality of groups of digital signals, so that received signals are obtained; when the signals are transmitted, signal modulation and power division processing are carried out to obtain multiple groups of digital signals, after digital beam forming processing is carried out on the multiple groups of digital signals, transmitted signal preprocessing is carried out to obtain transmitted signals corresponding to each patch array sub-antenna, and the signals are transmitted through the multiple patch array sub-antennas of the conformal antenna array. The invention improves the convenience, gain and application range of the meteor trail communication system.
Description
Technical Field
The invention belongs to the technical field of meteor trail communication, and particularly relates to a communication method and a conformal array antenna of a meteor trail communication system.
Background
The meteor, when sweeping through the air, emits a large amount of light and heat, which ionizes the surrounding gas and quickly spreads to form a columnar ionized cloud centered on the meteor's trajectory, which has the property of reflecting radio waves. This is the so-called "meteor trail". Remote communication by reflecting radio waves using meteor trail is called meteor trail communication.
In a satellite traceback communication system, antennas generally used include a yagi antenna, a log periodic antenna, and the like. The meteor trail communication system has the advantages that the communication frequency range is low, so that the size of the antenna is large, when the required antenna gain is high, the length of the antenna is large, the antenna erection difficulty is increased, the use convenience of the meteor trail communication system is reduced, the application scene of the meteor trail communication system is greatly limited, and the meteor trail communication system can only be fixedly used or can be used in vehicle-mounted transportation statics.
How to expand the application scene of the meteor trail communication system and improve the use convenience of the meteor trail communication system is a problem which needs to be solved urgently.
Disclosure of Invention
In view of this, the present invention provides a communication method of a meteor trail communication system and a conformal array antenna, which can improve the convenience of the meteor trail communication system.
A first aspect of an embodiment of the present invention provides a communication method for a meteor trail communication system, where the method is applied to a conformal array antenna, where the conformal array antenna includes at least one conformal antenna array, the at least one conformal antenna array is attached to a surface of a carrier according to a preset installation rule and is attached to the surface of the carrier, each conformal antenna array includes a plurality of patch array sub-antennas, and the method includes:
when the conformal array antenna is used for signal receiving, aiming at any conformal antenna array, acquiring electromagnetic wave signals respectively received by a plurality of patch array sub-antennas of the conformal antenna array, performing received signal preprocessing on the electromagnetic wave signals to obtain a plurality of groups of digital signals, and performing digital beam forming processing and demodulation processing on the plurality of groups of digital signals to obtain received signals;
when the conformal array antenna is used for signal transmission, signal modulation and power division processing are carried out on any conformal antenna array to obtain multiple groups of digital signals, after digital beam forming processing is carried out on the multiple groups of digital signals, transmission signal preprocessing is carried out to obtain a transmission signal corresponding to each patch array sub-antenna, and signal transmission is carried out through the multiple patch array sub-antennas of the conformal antenna array.
In one possible implementation, the received signal preprocessing includes:
performing low-noise amplification and down-conversion processing on the electromagnetic wave signals to obtain analog intermediate-frequency signals, and performing analog-to-digital (AD) sampling processing on the analog intermediate-frequency signals to obtain a plurality of groups of digital signals;
the transmit signal preprocessing comprises:
and obtaining an analog intermediate frequency signal through digital-analog-Digital (DA) processing, and performing up-conversion and power amplification processing on the analog intermediate frequency signal to obtain the transmitting signal.
In a possible implementation manner, when the conformal array antenna is used for signal reception, the digital beamforming processing is performed on the multiple sets of digital signals according to a preset formula, where the preset formula is:
wherein F (theta) is a beamforming result of digital beamforming processing on the plurality of sets of digital signals for a preset beamforming direction, DiFor the i-th digital signal, wiIs DiM is the number of digital signals to be processed for digital beamforming;
when the conformal array antenna is used for signal receiving, F (theta) is obtained after digital beam forming processing;
when the conformal array antenna is used for signal transmission, w is obtained after digital beam forming processingiDiTo wiDiAnd preprocessing the transmitting signal to obtain a transmitting signal corresponding to the ith patch array sub-antenna.
A second aspect of the embodiments of the present invention provides a conformal array antenna, including a data processing module and at least one conformal antenna array, where the at least one conformal antenna array is attached to a surface of a carrier according to a preset installation rule and is attached to the surface of the carrier, and each conformal antenna array includes a plurality of patch array sub-antennas;
when the conformal array antenna is used for signal receiving, aiming at any conformal antenna array, a plurality of patch array sub-antennas of the conformal antenna array respectively receive electromagnetic wave signals, the data processing module performs received signal preprocessing on the electromagnetic wave signals to obtain a plurality of groups of digital signals, and performs digital beam forming processing and demodulation processing on the plurality of groups of digital signals to obtain received signals;
when the conformal array antenna is used for signal transmission, the data processing module performs signal modulation and power division processing on any conformal antenna array to obtain multiple groups of digital signals, performs transmission signal preprocessing after performing digital beam forming processing on the multiple groups of digital signals to obtain a transmission signal corresponding to each patch array sub-antenna, and transmits the signals through the multiple patch array sub-antennas of the conformal antenna array.
In one possible implementation, the data processing module includes: the system comprises a multi-channel intermediate frequency digital TR component, an intermediate frequency acquisition processing unit, a digital beam forming processing unit, a modulation and demodulation unit and a local oscillator power division unit;
the multichannel intermediate frequency digital TR component and the intermediate frequency acquisition processing unit are used for preprocessing a received signal or preprocessing a transmitted signal;
the digital beam forming processing unit is used for carrying out digital beam forming processing on the multiple groups of digital signals;
the modulation and demodulation unit is used for carrying out demodulation processing or signal modulation processing;
the local oscillator power division unit is used for performing power division processing on the local oscillator signals.
In a possible implementation manner, when the conformal array antenna is used for signal reception, a receiving channel of the multi-channel intermediate frequency digital TR assembly performs low-noise amplification and down-conversion on an electromagnetic wave signal, outputs an analog intermediate frequency signal to the intermediate frequency acquisition and processing unit, and the intermediate frequency acquisition and processing unit performs analog-to-digital (AD) sampling on the analog intermediate frequency signal to obtain multiple groups of digital signals;
when the conformal array antenna is used for signal transmission, the intermediate frequency acquisition and processing unit obtains an analog intermediate frequency signal through digital-analog DA processing, and the multichannel intermediate frequency digital TR component performs up-conversion and power amplification processing on the analog intermediate frequency signal to obtain the transmission signal.
In a possible implementation manner, the conformal array antenna includes a first conformal antenna array, a second conformal antenna array, a third conformal antenna array, and a fourth conformal antenna array, where the first conformal antenna array and the second conformal antenna array are symmetrically distributed around a preset central line of the carrier, the third conformal antenna array and the fourth conformal antenna array are symmetrically distributed around the preset central line of the carrier, and a signal transmitted to the carrier in any direction is received or transmitted from the carrier to any direction through at least one of the first conformal antenna array, the second conformal antenna array, the third conformal antenna array, and the fourth conformal antenna array.
In a possible implementation, the carrier is an airplane, and the predetermined centerline of the carrier is a longitudinal axis of the airplane.
In one possible implementation, the patch array sub-antennas in the first, second, third and fourth conformal antenna arrays are mounted on and conform to the wing of the aircraft.
A third aspect of embodiments of the present invention provides a computer-readable storage medium, which stores a computer program that, when executed by a processor, implements the steps of the method as described above in the first aspect or any one of the possible implementations of the first aspect.
The embodiment of the invention provides a communication method of a meteor trail communication system and a conformal array antenna, which improve the bandwidth of the antenna through a patch array sub-antenna, improve the convenience and the application range of the meteor trail communication system, carry out beam forming processing on the transmitting and receiving signals of a plurality of patch array sub-antennas of one conformal antenna array through a digital beam forming algorithm and improve the gain of the system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a flowchart of an implementation of a communication method of a meteoric trail communication system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a conformal array antenna according to an embodiment of the present invention;
fig. 3 is a schematic view of an application scenario of a conformal array antenna according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
The common wave band for meteoric trail communication is 30-100 megahertz (MHz), and the working frequency is low. The relationship between the size of the antenna and the operating frequency of the antenna is generally designed as follows:
antenna length equal to C/2f
Where C denotes the speed of light and f denotes the operating frequency of the antenna.
The antenna operating frequency refers to the resonant frequency, or center frequency, of the antenna. Each antenna has a frequency range, referred to as bandwidth, within which the antenna impedance is minimal and efficiency is highest, the central optimum of the range, i.e. the center frequency, has a minimal standing-wave ratio, minimal power consumption and strongest signal.
Therefore, the working frequency of the antenna in the meteor trail communication system is low, so that the length of the system antenna is large, the erection difficulty of the antenna is large, and the use convenience is low.
A conformal array antenna refers to an array antenna attached to a surface of a carrier and attached to the carrier, that is, the array antenna needs to be conformally mounted on a surface with a fixed shape, so as to form a non-planar conformal antenna array. In a modern wireless communication system, the conformal array antenna can be conformal to the surface of a carrier platform running at a high speed, such as an airplane, a missile, a satellite and the like, and does not damage the characteristics of the carrier, such as the appearance structure, the aerodynamics and the like.
The conformal antenna can reduce the erection difficulty of the antenna to a certain extent, and the use convenience of meteor trail communication equipment is improved. At present, a conformal antenna which is applied more is a microstrip antenna, because the microstrip antenna has a lower profile and is easy to conform to a carrier, however, the microstrip antenna has a narrower bandwidth and a larger size in a low frequency band, which greatly limits the application scenario and the application range.
Based on this, the present application provides a communication method of a meteor trail communication system, where the method is applied to a conformal array antenna, where the conformal array antenna includes at least one conformal antenna array, the at least one conformal antenna array is attached to a surface of a carrier and attached to the surface of the carrier according to a preset installation rule, each conformal antenna array includes a plurality of patch array sub-antennas, and with reference to fig. 1, it shows an implementation flowchart of the communication method of the meteor trail communication system provided in an embodiment of the present invention, and details are as follows:
s101, when the conformal array antenna is used for signal receiving, for any conformal antenna array, obtaining electromagnetic wave signals respectively received by a plurality of patch array sub-antennas of the conformal antenna array, performing received signal preprocessing on the electromagnetic wave signals to obtain a plurality of groups of digital signals, and performing digital beam forming processing and demodulation processing on the plurality of groups of digital signals to obtain received signals.
Optionally, the process of preprocessing the received signal includes: and carrying out low-noise amplification and down-conversion processing on the electromagnetic wave signals to obtain analog intermediate frequency signals, and carrying out analog-to-digital (AD) sampling processing on the analog intermediate frequency signals to obtain a plurality of groups of digital signals.
And S102, when the conformal array antenna is used for signal transmission, performing signal modulation and power division processing on any conformal antenna array to obtain multiple groups of digital signals, performing digital beam forming processing on the multiple groups of digital signals, performing transmission signal preprocessing to obtain a transmission signal corresponding to each patch array sub-antenna, and transmitting signals through the multiple patch array sub-antennas of the conformal antenna array.
Optionally, the process of preprocessing the transmission signal includes: and obtaining an analog intermediate frequency signal through digital-analog-Digital (DA) processing, and performing up-conversion and power amplification processing on the analog intermediate frequency signal to obtain the transmitting signal.
Optionally, when the conformal array antenna is used for signal reception, the digital beamforming processing is performed on the multiple groups of digital signals through a preset formula, where the preset formula is:
wherein F (theta) is a beamforming result of digital beamforming processing on the plurality of sets of digital signals for a preset beamforming direction, DiFor the i-th digital signal, wiIs DiM is the number of digital signals to be processed for digital beamforming;
when the conformal array antenna is used for signal receiving, F (theta) is obtained after digital beam forming processing;
when the conformal array antenna is used for signal transmission, w is obtained after digital beam forming processingiDiTo wiDiAnd preprocessing the transmitting signal to obtain a transmitting signal corresponding to the ith patch array sub-antenna.
The beam forming technology utilizes different antennas to receive or transmit the same data to form a beam pointing to a specific direction, thereby reducing system interference and increasing antenna gain. In order to be able to maximize the signal strength received or transmitted to the desired user beam. The specific direction is the preset beam pointing direction.
The Digital Beam Forming (DBF) technique not only can fully retain the information collected on each conformal antenna array, but also can process the collected or transmitted information by using a complex digital processing method, and has the following advantages:
firstly, the signal to noise ratio is improved, the strength of an expected signal in an output signal after digital beam forming is obviously stronger than that of an interference signal, and a higher signal to noise ratio can be obtained at the moment;
secondly, the sidelobe level is reduced, in the actual communication process, the strength of an interference signal and the incoming wave direction are uncertain, the digital beam forming can weight the amplitude of the signal, the beam pointing direction can be changed by the digital beam which is summed after weighting, the beam pointing direction is enabled to point to the expected direction, meanwhile, the signal strength of the signal except the main beam in other directions is reduced, and meanwhile, the lower sidelobe level is obtained.
Thirdly, the interference signal is suppressed, and the interference direction can be set to zero through digital beam forming processing, so that the interference of the interference signal to the desired signal is suppressed.
Optionally, in the embodiment of the present invention, any conformal antenna is taken as an example for description.
For example, a conformal antenna array consists of 5 patch-array sub-antennas. When the conformal array antenna receives signals, the 5 patch array sub-antennas simultaneously receive a certain electromagnetic wave signal, the five electromagnetic wave signals are respectively subjected to low-noise amplification and down-conversion processing to obtain analog intermediate-frequency signals, the analog intermediate-frequency signals are subjected to analog-to-digital (AD) sampling processing to obtain 5 groups of digital signals, weighting coefficients corresponding to each group of digital signals are obtained through digital beam forming processing and preset algorithms such as self-adaptive algorithms, weighting processing is carried out through the preset formulas, and the received signals are obtained after demodulation.
When the conformal array antenna is used for signal transmission, the modulated digital signals are only 1 path, the modulated digital signals are divided into 5 paths through the power division module to obtain 5 groups of digital signals, the weighting coefficients corresponding to the groups of digital signals are obtained through digital beam forming processing, the weighted digital signals are obtained, 5 analog intermediate frequency signals are obtained through digital-analog-Digital (DA) processing, optionally, each group of digital signals comprises a pair of digital signals, a corresponding analog intermediate frequency signal is obtained through digital-analog-DA processing, each analog intermediate frequency signal is subjected to up-conversion and power amplification processing to obtain 5 transmission signals, the 5 transmission signals and the 5 patch array sub-antennas have unique mapping relations, and the 5 transmission signals are transmitted through the corresponding patch array sub-antennas.
Therefore, the invention improves the antenna bandwidth through the patch array sub-antennas, improves the convenience and the application range of the meteor trail communication system, and improves the gain of the system by performing beam forming processing on the transmitting and receiving signals of a plurality of patch array sub-antennas of a conformal antenna array through a digital beam forming algorithm.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Fig. 2 is a schematic structural diagram of a conformal array antenna according to an embodiment of the present invention, and with reference to fig. 2, the conformal array antenna includes a data processing module 21 and at least one conformal antenna array 22, the at least one conformal antenna array 22 is attached to a surface of a carrier according to a preset installation rule and is attached to the surface of the carrier, and each conformal antenna array includes a plurality of patch array sub-antennas;
fig. 2 only illustrates the connection relationship between one conformal antenna array 22 and the data processing module 21, and when there are multiple conformal antenna arrays, the connection relationship between the other conformal antenna arrays and the data processing module is also illustrated in fig. 2.
When the conformal array antenna is used for signal reception, for any conformal antenna array, the multiple patch array sub-antennas of the conformal antenna array respectively receive electromagnetic wave signals, the data processing module 21 performs received signal preprocessing on the electromagnetic wave signals to obtain multiple groups of digital signals, and performs digital beam forming processing and demodulation processing on the multiple groups of digital signals to obtain received signals;
when the conformal array antenna is used for signal transmission, for any conformal antenna array, the data processing module 22 performs signal modulation and power division processing to obtain multiple groups of digital signals, performs transmission signal preprocessing after performing digital beam forming processing on the multiple groups of digital signals to obtain a transmission signal corresponding to each patch array sub-antenna, and performs signal transmission through the multiple patch array sub-antennas of the conformal antenna array.
Optionally, the data processing module 21 includes: a multichannel intermediate frequency digital TR component 211, an intermediate frequency acquisition processing unit 212, a digital beam forming processing unit 213, a modulation and demodulation unit 214 and a local oscillator power division unit 215;
the multi-channel intermediate frequency digital TR module 211 and the intermediate frequency acquisition processing unit 212 are used for preprocessing a received signal or preprocessing a transmitted signal;
the digital beam forming processing unit 213 is configured to perform digital beam forming processing on the multiple sets of digital signals;
the modulation and demodulation unit 214 is configured to perform demodulation processing or signal modulation processing;
the local oscillator power dividing unit 215 is configured to perform power division processing on the local oscillator signal.
Optionally, when the conformal array antenna is used for signal reception, a receiving channel of the multi-channel intermediate frequency digital TR assembly 211 performs low-noise amplification and down-conversion on an electromagnetic wave signal, outputs an analog intermediate frequency signal to the intermediate frequency acquisition processing unit 212, and the intermediate frequency acquisition processing unit 212 performs analog-to-digital (AD) sampling on the analog intermediate frequency signal to obtain multiple groups of digital signals;
when the conformal array antenna is used for signal transmission, the intermediate frequency acquisition processing unit 212 obtains an analog intermediate frequency signal through digital-analog-Digital (DA) processing, and the multichannel intermediate frequency digital Transmitter (TR) component 211 performs up-conversion and power amplification processing on the analog intermediate frequency signal to obtain the transmission signal.
Alternatively, as shown in fig. 2, the multi-channel if digital TR module 211 includes a plurality of channels, and each patch array sub-antenna is connected to the multi-channel if digital TR module through one channel.
Optionally, the conformal array antenna includes a first conformal antenna array, a second conformal antenna array, a third conformal antenna array and a fourth conformal antenna array, where the first conformal antenna array and the second conformal antenna array are symmetrically distributed around a preset central line of the carrier, and the third conformal antenna array and the fourth conformal antenna array are symmetrically distributed around the preset central line of the carrier, and a signal transmitted from any direction to the carrier is received through at least one of the first conformal antenna array, the second conformal antenna array, the third conformal antenna array and the fourth conformal antenna array, or a signal is transmitted from the carrier to any direction.
The conformal array antenna is conformal to the carrier through the installation mode, and the carrier is fully covered. To ensure that signals transmitted to the carrier in any direction can be received by the at least one conformal antenna array, and that the carrier can transmit signals in any direction through the at least one conformal antenna array.
Optionally, with reference to fig. 3, the carrier provided in the embodiment of the present invention may be an airplane, and the preset centerline of the carrier is a longitudinal axis of the airplane.
Optionally, with reference to fig. 3, patch array sub-antennas in the first, second, third, and fourth conformal antenna arrays are mounted on and conformal with a wing of the aircraft.
As shown in fig. 3, the reference numbers thereof may be sequentially expressed as:
1: a first conformal antenna array;
2: a second conformal antenna array;
3: a third conformal antenna array;
4: a fourth conformal antenna array;
5: patch array antenna.
It should be noted that an airplane is only one implementation manner provided in the embodiment of the present invention, and other carriers, such as an automobile, a ship, a rocket, and the like, may all be carriers of the conformal array antenna in the embodiment of the present invention, which is not limited in the embodiment of the present invention.
The embodiment of the invention provides a conformal array antenna, which improves the bandwidth of the antenna through a patch array sub-antenna, improves the convenience and the application range of a meteor trail communication system, and improves the gain of the system by performing beam forming processing on the transmitted and received signals of a plurality of patch array sub-antennas of one conformal antenna array through a digital beam forming algorithm.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when executed by a processor, the computer program implements: when the conformal array antenna is used for signal receiving, aiming at any conformal antenna array, acquiring electromagnetic wave signals respectively received by a plurality of patch array sub-antennas of the conformal antenna array, performing received signal preprocessing on the electromagnetic wave signals to obtain a plurality of groups of digital signals, and performing digital beam forming processing and demodulation processing on the plurality of groups of digital signals to obtain received signals;
when the conformal array antenna is used for signal transmission, signal modulation and power division processing are carried out on any conformal antenna array to obtain multiple groups of digital signals, after digital beam forming processing is carried out on the multiple groups of digital signals, transmission signal preprocessing is carried out to obtain a transmission signal corresponding to each patch array sub-antenna, and signal transmission is carried out through the multiple patch array sub-antennas of the conformal antenna array.
Optionally, the received signal preprocessing includes: performing low-noise amplification and down-conversion processing on the electromagnetic wave signals to obtain analog intermediate-frequency signals, and performing analog-to-digital (AD) sampling processing on the analog intermediate-frequency signals to obtain a plurality of groups of digital signals;
the transmit signal preprocessing comprises:
and obtaining an analog intermediate frequency signal through digital-analog-Digital (DA) processing, and performing up-conversion and power amplification processing on the analog intermediate frequency signal to obtain the transmitting signal.
When the conformal array antenna is used for signal receiving, performing digital beam forming processing on the multiple groups of digital signals through a preset formula, wherein the preset formula is as follows:
wherein F (theta) is a beam form for performing digital beam forming processing on the multiple groups of digital signals for a preset beam pointing directionAs a result, DiFor the i-th digital signal, wiIs DiM is the number of digital signals to be processed for digital beamforming;
when the conformal array antenna is used for signal receiving, F (theta) is obtained after digital beam forming processing;
when the conformal array antenna is used for signal transmission, w is obtained after digital beam forming processingiDiTo wiDiAnd preprocessing the transmitting signal to obtain a transmitting signal corresponding to the ith patch array sub-antenna.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A communication method of a meteor trail communication system is characterized in that the method is applied to a conformal array antenna, the conformal array antenna comprises at least one conformal antenna array, the at least one conformal antenna array is attached to the surface of a carrier and attached to the surface of the carrier according to a preset installation rule, each conformal antenna array comprises a plurality of patch array sub-antennas, and the method comprises the following steps:
when the conformal array antenna is used for signal receiving, aiming at any conformal antenna array, acquiring electromagnetic wave signals respectively received by a plurality of patch array sub-antennas of the conformal antenna array, performing received signal preprocessing on the electromagnetic wave signals to obtain a plurality of groups of digital signals, and performing digital beam forming processing and demodulation processing on the plurality of groups of digital signals to obtain received signals;
when the conformal array antenna is used for signal transmission, signal modulation and power division processing are carried out on any conformal antenna array to obtain multiple groups of digital signals, after digital beam forming processing is carried out on the multiple groups of digital signals, transmission signal preprocessing is carried out to obtain a transmission signal corresponding to each patch array sub-antenna, and signal transmission is carried out through the multiple patch array sub-antennas of the conformal antenna array.
2. The method of claim 1, wherein the received signal pre-processing comprises:
performing low-noise amplification and down-conversion processing on the electromagnetic wave signals to obtain analog intermediate-frequency signals, and performing analog-to-digital (AD) sampling processing on the analog intermediate-frequency signals to obtain a plurality of groups of digital signals;
the transmit signal preprocessing comprises:
and obtaining an analog intermediate frequency signal through digital-analog-Digital (DA) processing, and performing up-conversion and power amplification processing on the analog intermediate frequency signal to obtain the transmitting signal.
3. The method of claim 1, further comprising: when the conformal array antenna is used for signal receiving, performing digital beam forming processing on the multiple groups of digital signals through a preset formula, wherein the preset formula is as follows:
wherein F (theta) is a beamforming result of digital beamforming processing on the plurality of sets of digital signals for a preset beamforming direction, DiFor the i-th digital signal, wiIs DiM is the number of digital signals to be processed for digital beamforming;
when the conformal array antenna is used for signal receiving, F (theta) is obtained after digital beam forming processing;
when the conformal array antenna is used for signal transmission, w is obtained after digital beam forming processingiDiTo wiDiAnd preprocessing the transmitting signal to obtain a transmitting signal corresponding to the ith patch array sub-antenna.
4. The conformal array antenna is characterized by comprising a data processing module and at least one conformal antenna array, wherein the at least one conformal antenna array is attached to the surface of a carrier according to a preset installation rule and is attached to the surface of the carrier, and each conformal antenna array comprises a plurality of patch array sub-antennas;
when the conformal array antenna is used for signal receiving, aiming at any conformal antenna array, a plurality of patch array sub-antennas of the conformal antenna array respectively receive electromagnetic wave signals, the data processing module performs received signal preprocessing on the electromagnetic wave signals to obtain a plurality of groups of digital signals, and performs digital beam forming processing and demodulation processing on the plurality of groups of digital signals to obtain received signals;
when the conformal array antenna is used for signal transmission, the data processing module performs signal modulation and power division processing on any conformal antenna array to obtain multiple groups of digital signals, performs transmission signal preprocessing after performing digital beam forming processing on the multiple groups of digital signals to obtain a transmission signal corresponding to each patch array sub-antenna, and transmits the signals through the multiple patch array sub-antennas of the conformal antenna array.
5. The conformal array antenna of claim 4, wherein the data processing module comprises: the system comprises a multi-channel intermediate frequency digital TR component, an intermediate frequency acquisition processing unit, a digital beam forming processing unit, a modulation and demodulation unit and a local oscillator power division unit;
the multichannel intermediate frequency digital TR component and the intermediate frequency acquisition processing unit are used for preprocessing a received signal or preprocessing a transmitted signal;
the digital beam forming processing unit is used for carrying out digital beam forming processing on the multiple groups of digital signals;
the modulation and demodulation unit is used for carrying out demodulation processing or signal modulation processing;
the local oscillator power division unit is used for performing power division processing on the local oscillator signals.
6. The conformal array antenna according to claim 5, wherein when the conformal array antenna is used for signal reception, a receiving channel of the multi-channel intermediate frequency digital TR assembly performs low noise amplification and down conversion on an electromagnetic wave signal and outputs an analog intermediate frequency signal to the intermediate frequency acquisition processing unit, and the intermediate frequency acquisition processing unit performs analog-to-digital (AD) sampling on the analog intermediate frequency signal to obtain a plurality of sets of digital signals;
when the conformal array antenna is used for signal transmission, the intermediate frequency acquisition and processing unit obtains an analog intermediate frequency signal through digital-analog DA processing, and the multichannel intermediate frequency digital TR component performs up-conversion and power amplification processing on the analog intermediate frequency signal to obtain the transmission signal.
7. The conformal array antenna according to any one of claims 4 to 6, wherein the conformal array antenna comprises a first conformal antenna array, a second conformal antenna array, a third conformal antenna array and a fourth conformal antenna array, wherein the first conformal antenna array and the second conformal antenna array are symmetrically distributed around a preset central line of the carrier, the third conformal antenna array and the fourth conformal antenna array are symmetrically distributed around the preset central line of the carrier, and a signal transmitted to the carrier from any direction is received or transmitted from the carrier to any direction through at least one of the first conformal antenna array, the second conformal antenna array, the third conformal antenna array and the fourth conformal antenna array.
8. The conformal array antenna of claim 7, wherein the carrier is an aircraft and the predetermined centerline of the carrier is a longitudinal axis of the aircraft.
9. The conformal array antenna of claim 8, wherein the patch array sub-antennas of the first, second, third and fourth conformal antenna arrays are mounted on and conformal with a wing of the aircraft.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 3.
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| CN115037348A (en) * | 2022-05-11 | 2022-09-09 | 中国人民解放军陆军装甲兵学院 | Dual-band communication analog repeater with printed array antenna |
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