CN115580343B - Low-orbit satellite autonomous orbit control method, device and system - Google Patents
Low-orbit satellite autonomous orbit control method, device and system Download PDFInfo
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- CN115580343B CN115580343B CN202211481009.XA CN202211481009A CN115580343B CN 115580343 B CN115580343 B CN 115580343B CN 202211481009 A CN202211481009 A CN 202211481009A CN 115580343 B CN115580343 B CN 115580343B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The invention discloses a low-orbit satellite autonomous orbit control method, a device and a system, wherein the method comprises the following steps: transmitting a request message to at least one ground terminal; receiving feedback information of the at least one ground terminal, and determining at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain at least one auxiliary ground terminal; transmitting configuration information to the at least one ancillary terrestrial terminal; receiving a chirp signal sent by the at least one auxiliary ground terminal; calculating the current orbit information of the low earth orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal; and executing autonomous orbit control according to the current orbit information. The autonomous orbit control method for the low-orbit satellite provided by the invention avoids the problem that the low-orbit satellite cannot realize orbit control due to less deployment of the ground measurement and control station, and realizes autonomous orbit control of the low-orbit satellite through the widely-existing ground terminal.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to a low-orbit satellite autonomous orbit control method, device and system.
Background
The traditional low-orbit satellite orbit control technology tracks the orbit of a low-orbit satellite through a ground measurement and control station, injects an orbit transfer instruction into the low-orbit satellite through a communication link, and finally executes orbit transfer operation by a low-orbit satellite on-board computer.
However, the orbit control technology based on the ground measurement and control station has a lot of disadvantages, for example, the technology is easily limited by the position of the ground measurement and control station, and because the ground measurement and control station is deployed less and has a long distance, when the satellite is out of the signal coverage area of the ground measurement and control station, the orbit control cannot be performed. The orbit control process of the low-orbit satellite is greatly influenced by the ground measurement and control station, and the realization process is difficult.
Disclosure of Invention
The invention aims to provide a low-orbit satellite autonomous orbit control method, device and system, and solves the technical problems that the orbit control process of a low-orbit satellite is influenced by a ground measurement and control station and the like.
According to an aspect of an embodiment of the present invention, there is provided a low-earth orbit satellite autonomous orbit control method, including:
transmitting a request message to at least one ground terminal;
receiving feedback information of the at least one ground terminal, and determining at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain at least one auxiliary ground terminal;
transmitting configuration information to the at least one ancillary terrestrial terminal;
receiving a chirp signal sent by the at least one auxiliary ground terminal;
calculating the current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal;
and executing autonomous orbit control according to the current orbit information.
In some optional embodiments, the feedback information comprises at least one of the following information: the system comprises indication information of whether the ground terminal has the capability of assisting the low-orbit satellite to carry out autonomous orbit control, position information of the ground terminal and key information for verifying authorization.
In some optional embodiments, the configuration information comprises at least one of the following information: transmission time, frequency, transmission power, and transmission beam direction of the chirp signal.
In some optional embodiments, the receiving the chirp signal transmitted by the at least one ancillary terrestrial terminal includes:
when the frequency of the chirp signals indicated by the configuration information is greater than a preset value, receiving the chirp signals respectively sent by the at least one auxiliary ground terminal;
and when the frequency of the chirp signal indicated by the configuration information is less than or equal to a preset value, receiving the chirp signal simultaneously transmitted by the at least one auxiliary ground terminal.
In some optional embodiments, the receiving the chirp signals respectively transmitted by the at least one ancillary terrestrial terminal includes:
and respectively receiving the chirp signals by using different time domain resources, or respectively receiving the chirp signals by using different frequency domain resources, or respectively receiving the chirp signals by using different code domain resources.
In some optional embodiments, the receiving the chirp signals simultaneously transmitted by the at least one ancillary terrestrial terminal includes:
and receiving the chirp signal transmitted by adopting the same frequency as the receiving frequency of the synthetic aperture radar.
According to another aspect of the embodiments of the present invention, there is provided a low-earth orbit satellite autonomous orbit control method, applied to a ground terminal, the method including:
receiving a request message sent by a low earth orbit satellite, generating and sending feedback information to the low earth orbit satellite so that the low earth orbit satellite determines at least one ground terminal used for autonomous orbit control assistance as an auxiliary ground terminal according to the feedback information, wherein the ground terminal is the auxiliary ground terminal;
receiving configuration information sent by the low-orbit satellite, and generating a linear frequency modulation signal in response to the configuration information;
and sending the linear frequency modulation signal to the low-orbit satellite so that the low-orbit satellite calculates the current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal, and executes autonomous orbit control according to the current orbit information.
In some optional embodiments, the transmitting the chirp signal to the low earth orbit satellite comprises:
when the frequency of the chirp signal indicated by the configuration information is greater than a preset value, the chirp signal is respectively transmitted with other auxiliary ground terminals in the at least one auxiliary ground terminal;
and when the frequency of the chirp signal indicated by the configuration information is less than or equal to a preset value, transmitting the chirp signal simultaneously with other auxiliary ground terminals in the at least one auxiliary ground terminal.
In some optional embodiments, the transmitting the chirp signal separately from other ones of the at least one ancillary terrestrial terminal comprises:
and respectively using different time domain resources to send the chirp signals, or respectively using different frequency domain resources to send the chirp signals, or respectively using different code domain resources to send the chirp signals.
In some optional embodiments, said transmitting said chirp signal simultaneously with other ones of said at least one ancillary terrestrial terminal comprises:
the chirp signal is transmitted using the same frequency as the synthetic aperture radar receive frequency.
According to another aspect of the embodiments of the present invention, there is provided an autonomous orbit control apparatus for a low-earth orbit satellite, the autonomous orbit control apparatus being disposed on the low-earth orbit satellite, the autonomous orbit control apparatus including:
the first transceiver module is used for sending a request message to at least one ground terminal; receiving feedback information of the at least one ground terminal, and determining at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain at least one auxiliary ground terminal; transmitting configuration information to the at least one ancillary terrestrial terminal; receiving a chirp signal sent by the at least one auxiliary ground terminal;
and the first processing module is used for calculating the current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal and executing autonomous orbit control according to the current orbit information.
According to another aspect of the embodiments of the present invention, there is provided an autonomous orbit control apparatus for a low-earth orbit satellite, which is provided in a ground terminal, the apparatus including:
the second transceiving module is used for receiving a request message sent by a low-orbit satellite and sending feedback information to the low-orbit satellite so that the low-orbit satellite determines at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain an auxiliary ground terminal; receiving configuration information sent by the low-orbit satellite, sending the linear frequency modulation signal to the low-orbit satellite, so that the low-orbit satellite calculates current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal, and then executing autonomous orbit control according to the current orbit information;
the second processing module is used for responding to the request message and generating feedback information; generating a chirp signal in response to the configuration information.
According to another aspect of the embodiments of the present invention, there is provided a communication system, comprising at least one low-orbit satellite and at least one ground terminal, wherein each low-orbit satellite of the at least one low-orbit satellite is configured to perform an operation corresponding to the low-orbit satellite autonomous orbit control method; the at least one ground terminal is used for executing the operation corresponding to the low-orbit satellite autonomous orbit control method.
According to another aspect of the embodiments of the present invention, a computer storage medium is provided, where at least one executable instruction is stored, and the executable instruction when executed causes a computing device to perform operations corresponding to the above-mentioned low-orbit satellite autonomous orbit control method.
According to the scheme provided by the embodiment of the invention, the method, the device and the system for autonomous orbit control of the low-orbit satellite are provided, and request information is sent to at least one ground terminal; receiving feedback information of the at least one ground terminal, and determining at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain at least one auxiliary ground terminal; transmitting configuration information to the at least one ancillary terrestrial terminal; receiving a chirp signal sent by the at least one auxiliary ground terminal; calculating the current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal; and executing autonomous orbit control according to the current orbit information. The autonomous orbit control of the low-orbit satellite can be realized, the autonomous orbit control method of the low-orbit satellite provided by the invention realizes the autonomous orbit control through the widely-existing ground terminal, the problem that the autonomous orbit control of the low-orbit satellite cannot be realized because the low-orbit satellite is out of the signal coverage range due to less deployment of the ground measurement and control station is avoided, and the autonomous orbit control of the low-orbit satellite can be carried out at any time and any place by utilizing the ground terminal.
Drawings
Fig. 1 is a flowchart illustrating an autonomous low-earth orbit control method according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating scanning of a low-orbit satellite determination-aided ground terminal provided by an embodiment of the invention;
fig. 3 is a schematic diagram illustrating that a plurality of terminals respectively transmit chirp signals according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating chirp signals respectively transmitted by a plurality of terminals according to an embodiment of the present invention;
fig. 5 shows radar imaging images respectively imaged by a plurality of terminals according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating chirp signals simultaneously transmitted by a plurality of terminals according to an embodiment of the present invention;
FIG. 7 shows a radar imaging image with multiple terminals imaging simultaneously, provided by an embodiment of the invention;
fig. 8 is a flowchart illustrating an autonomous low-earth orbit satellite orbit control method applied to a ground terminal according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an autonomous low-orbit satellite orbit control device provided by an embodiment of the invention;
fig. 10 is a schematic structural diagram of an autonomous low-earth orbit control device for a ground terminal according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 is a flowchart illustrating an autonomous low-orbit satellite tracking method according to an embodiment of the present invention. As shown in fig. 1, the method comprises the steps of:
and step 16, executing autonomous orbit control according to the current orbit information.
In this embodiment, by sending a request message to at least one ground terminal; receiving feedback information of the at least one ground terminal, and determining at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain at least one auxiliary ground terminal; transmitting configuration information to the at least one ancillary terrestrial terminal; receiving a chirp signal sent by the at least one auxiliary ground terminal; calculating the current orbit information of the low earth orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal; and executing autonomous orbit control according to the current orbit information. The autonomous orbit control of the low-orbit satellite can be realized, the autonomous orbit control method of the low-orbit satellite provided by the invention realizes the autonomous orbit control through the widely-existing ground terminal, the problem that the autonomous orbit control of the low-orbit satellite cannot be realized because the low-orbit satellite is out of the signal coverage range due to less deployment of the ground measurement and control station is avoided, and the autonomous orbit control of the low-orbit satellite can be carried out at any time and any place by utilizing the ground terminal.
In some embodiments of the present invention, when the low-earth orbit satellite identifies that autonomous orbit control is required through the on-board computer, for example, when no available ground measurement and control station is identified through the current communication link, the on-board computer identifies that attitude excitation is required currently, and at this time, the low-earth orbit satellite sends a request message through the communication link to request the ground terminal to perform auxiliary autonomous orbit control.
In this embodiment, the low earth orbit satellite transmits a broadcast message to request information from all ground terminals within the communication coverage of the low earth orbit satellite.
In some embodiments of the invention, the feedback information comprises at least one of the following information: the system comprises indication information of whether the ground terminal has the capability of assisting the low-orbit satellite to carry out autonomous orbit control, position information of the ground terminal and key information for verifying authorization.
In this embodiment, the feedback information includes, but is not limited to, as described above, the indication information indicates whether the ground terminal has the capability of assisting the low-orbit satellite for autonomous orbit control, and when the ground terminal has the assistance capability, the ground terminal may be selected by the low-orbit satellite for assistance, and when the ground terminal does not have the assistance capability, the ground terminal may not be selected by the low-orbit satellite for assistance; the position information of the ground terminal includes coordinate information of the terminal position, but is not limited to coordinate information; the key information comprises verification information authorized by the ground terminal.
In some embodiments of the present invention, after the low earth orbit satellite receives the feedback information, it is determined whether to select the current earth terminal as the auxiliary earth terminal according to the position information of the earth terminal and whether the earth terminal has the capability of assisting the low earth orbit satellite to perform autonomous orbit control.
In this embodiment, the low earth satellite first filters the ground terminals with auxiliary capability, and then determines the appropriate ground terminal for assisting autonomous orbit control according to the position, the number of the auxiliary ground terminals should be at least one, in this embodiment, the number of the auxiliary ground terminals is three, and the number of the actually selected auxiliary ground terminals includes, but is not limited to, three, and may be any number.
Fig. 2 shows a schematic diagram of scanning for determining an assisted terrestrial terminal for a low-orbit satellite according to an embodiment of the present invention, where as shown in fig. 2, a terminal #1, that is, a first terminal, a terminal #2, that is, a second terminal, a terminal #3, that is, a third terminal, a terminal #4, that is, a fourth terminal, and a terminal #5, that is, a fifth terminal are all located in a communication beam of the low-orbit satellite, the low-orbit satellite transmits request information to the five terrestrial terminals, and finally determines, according to feedback information, that the first terminal, the second terminal, and the third terminal are assisted terrestrial terminals, and transmits configuration information to the first terminal, the second terminal, and the third terminal through a communication link, and three assisted terrestrial terminals transmit chirp signals as shown in fig. 3.
In some embodiments of the invention, the configuration information comprises at least one of the following information: transmission time, frequency, transmission power, transmission beam direction of the chirp signal.
In this embodiment, the sending time of the chirp signal may use the frame of the communication signal as a reference time, that is, the configuration information indicates which frame after the auxiliary ground terminal receives the communication signal is the starting sending; the chirp signal has a frequency that is the carrier frequency of the chirp signal transmission, and since the chirp signal is transmitted by the ancillary terrestrial terminal rather than reflected by the terrestrial terminal, a higher frequency can be set to improve the azimuth resolution.
In some embodiments of the present invention, receiving the chirp signal transmitted by the at least one ancillary terrestrial terminal includes:
when the frequency of the chirp signals indicated by the configuration information is greater than a preset value, receiving the chirp signals respectively sent by the at least one auxiliary ground terminal;
and when the frequency of the chirp signal indicated by the configuration information is less than or equal to a preset value, receiving the chirp signal simultaneously transmitted by the at least one auxiliary ground terminal.
In this embodiment, when the frequency of the chirp signal indicated by the configuration information is higher, the chirp signal received by the low earth satellite is transmitted by each of the plurality of auxiliary ground terminals; when the frequency of the chirp signal indicated by the configuration information is low, the chirp signal received by the low earth orbit satellite is simultaneously transmitted by the plurality of auxiliary ground terminals without discrimination.
In some embodiments of the present invention, receiving the chirp signals respectively transmitted by the at least one ancillary terrestrial terminal includes:
and respectively receiving the chirp signals by using different time domain resources, or respectively receiving the chirp signals by using different frequency domain resources, or respectively receiving the chirp signals by using different code domain resources.
In this embodiment, since the frequency of the chirp signal indicated by the configuration information is high, in order to avoid aliasing of the signal, chirp signals sent by a plurality of auxiliary ground terminals need to be distinguished, and chirp signals sent by different terminals can be distinguished in a time domain; alternatively, a distinction can be made over the code domain; alternatively, the distinction may be made in the frequency domain. Fig. 4 shows a schematic diagram of chirp signals respectively transmitted by multiple terminals according to an embodiment of the present invention, and as shown in fig. 4, three ancillary terrestrial terminals use the same carrier frequency, and the chirp signals transmitted by the three ancillary terrestrial terminals are distinguished in a time domain, and according to an indication of configuration information, the three ancillary terrestrial terminals respectively transmit sequentially, where a first terminal does not set a delay, and a second terminal and a third terminal transmit sequentially with a delay of one configuration length. The low earth orbit satellite receives the chirp signals with reference to the transmission time of the downlink data frame, does not set a delay when receiving the chirp signals transmitted by the first terminal, sequentially sets a delay by a configuration length when receiving the chirp signals transmitted by the second terminal and the third terminal, and the results of receiving the three chirp signals and respectively imaging the received chirp signals are shown in fig. 5.
In some embodiments of the present invention, receiving the chirp signals simultaneously transmitted by the at least one ancillary terrestrial terminal comprises:
and receiving the chirp signal transmitted by adopting the same frequency as the receiving frequency of the synthetic aperture radar.
In this embodiment, when the frequency of the chirp signal indicated by the configuration information is low, the chirp signals transmitted by the plurality of auxiliary ground terminals may not be distinguished, and the chirp signals received by the low-earth satellite may be the same in the frequency domain, the time domain, and the code domain. At this time, the frequency of the chirp signal indicated by the configuration information is the same as the reception frequency of the synthetic aperture radar. Fig. 6 is a schematic diagram illustrating chirp signals simultaneously transmitted by a plurality of terminals according to an embodiment of the present invention, and as shown in fig. 6, three auxiliary ground terminals simultaneously transmit chirp signals, and a result of receiving and imaging three chirp signals by a low-earth satellite is as shown in fig. 7.
In some embodiments of the present invention, after receiving the chirp signal, the low-earth orbit satellite inputs the chirp signal to a synthetic aperture radar imaging algorithm, and finally obtains a radar imaging image. Fig. 5 shows radar imaging images obtained by imaging a plurality of terminals respectively, where when a plurality of ground-assisted terminals respectively transmit chirp signals, only one ground-assisted terminal transmits a chirp signal at the same time, so that only one point in one radar imaging image is correspondingly obtained, and three radar imaging images are finally obtained, corresponding to the positions of the three ground-assisted terminals. Fig. 7 shows a radar imaging image obtained by simultaneously imaging a plurality of terminals according to an embodiment of the present invention, and when a plurality of ground aiding terminals simultaneously transmit chirp signals, a low earth orbit satellite can obtain position information of three ground aiding terminals in one radar imaging image.
And then, the low-orbit satellite identifies the pixel indexes of the pixel points in the azimuth direction and the distance direction according to the position information of the pixel points in the radar imaging image, and the real physical distance between the low-orbit satellite and the corresponding auxiliary ground terminal is calculated according to the actual physical distance of the corresponding resolution. Meanwhile, the low-orbit satellite can obtain the position information of the low-orbit satellite by combining the position information of the auxiliary ground terminal in the feedback information, so that the current actual orbit parameter is obtained, and the autonomous orbit control operation is executed.
Fig. 8 shows a flowchart of a low-earth orbit satellite autonomous orbit control method applied to a ground terminal according to an embodiment of the present invention. As shown in fig. 8, the method comprises the steps of:
and 83, sending the linear frequency modulation signal to the low-orbit satellite, so that the low-orbit satellite calculates the current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal, and executes autonomous orbit control according to the current orbit information.
In the embodiment, the ground terminal is a ground terminal with the capability of assisting the low-orbit satellite to perform autonomous orbit control, and is selected by the low-orbit satellite for assistance; and the auxiliary ground terminal generates a corresponding linear frequency modulation signal according to the indication of the configuration information and transmits the linear frequency modulation signal to the low-earth orbit satellite.
In some embodiments of the invention, transmitting the chirp signal to the low earth orbit satellite comprises:
when the frequency of the chirp signal indicated by the configuration information is greater than a preset value, the chirp signal is respectively transmitted to other auxiliary ground terminals in the at least one auxiliary ground terminal;
and when the frequency of the chirp signal indicated by the configuration information is less than or equal to a preset value, transmitting the chirp signal simultaneously with other auxiliary ground terminals in the at least one auxiliary ground terminal.
In this embodiment, when the frequency of the chirp signal indicated by the configuration information is higher, the azimuth resolution may be improved, so that the positioning accuracy is higher, but the high-frequency chirp signal is easy to alias, and in order to avoid aliasing of the signal, a plurality of auxiliary ground terminals need to transmit the chirp signal respectively; when the frequency of the chirp signal indicated by the configuration information is low, the chirp signal is not mixed and can be transmitted without discrimination.
In some embodiments of the present invention, the transmitting the chirp signal separately from other ones of the at least one ancillary terrestrial terminal comprises:
and respectively using different time domain resources to send the chirp signals, or respectively using different frequency domain resources to send the chirp signals, or respectively using different code domain resources to send the chirp signals.
In this embodiment, in order to distinguish chirp signals sent by different ground-assisted terminals, it is necessary to separate the chirp signals in a frequency domain, a time domain, or a code domain, and fig. 4 shows a schematic diagram of chirp signals sent by a plurality of terminals respectively according to an embodiment of the present invention, where, as shown in fig. 4, three ground-assisted terminals use the same carrier frequency, and the chirp signals sent by the three terminals are distinguished in the time domain, and according to an indication of configuration information, the three ground-assisted terminals respectively and sequentially send the chirp signals, where a first terminal does not set a delay, and a second terminal and a third terminal sequentially delay for a configured length to send the chirp signals.
In some embodiments of the invention, transmitting the chirp simultaneously with other ones of the at least one ancillary terrestrial terminal comprises:
the chirp signal is transmitted using the same frequency as the synthetic aperture radar receive frequency.
In this embodiment, when the frequency of the chirp signal indicated by the configuration information is low, the chirp signals sent by the plurality of auxiliary ground terminals may not be distinguished, and the chirp signals may be the same in the frequency domain, the time domain, and the code domain. At this time, the frequency of the chirp signal indicated by the configuration information is the same as the reception frequency of the synthetic aperture radar. Fig. 6 is a schematic diagram illustrating chirp signals simultaneously transmitted by multiple terminals according to an embodiment of the present invention, and as shown in fig. 6, three auxiliary ground terminals simultaneously transmit chirp signals.
Fig. 9 is a schematic structural diagram of an autonomous low-orbit satellite tracking apparatus 90 according to an embodiment of the present invention, and as shown in fig. 9, the apparatus includes:
a first transceiver module 91, configured to send a request message to at least one ground terminal; receiving feedback information of the at least one ground terminal, and determining at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain at least one auxiliary ground terminal; transmitting configuration information to the at least one ancillary terrestrial terminal; receiving a linear frequency modulation signal sent by the at least one auxiliary ground terminal;
and the first processing module 92 is configured to calculate current orbit information of the low-earth orbit satellite by using a synthetic aperture radar algorithm according to the chirp signal, and execute autonomous orbit control according to the current orbit information.
Fig. 10 is a schematic structural diagram of an autonomous low-earth orbit control apparatus 100 for a ground terminal according to an embodiment of the present invention, and as shown in fig. 10, the apparatus includes:
the second transceiver module 101 is configured to receive a request message sent by a low-earth-orbit satellite, and send feedback information to the low-earth-orbit satellite, so that the low-earth-orbit satellite determines at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain an assisted ground terminal; receiving configuration information sent by the low-orbit satellite, sending the linear frequency modulation signal to the low-orbit satellite, so that the low-orbit satellite calculates current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal, and then executing autonomous orbit control according to the current orbit information;
the second processing module 102 is configured to generate feedback information in response to the request message; generating a chirp signal in response to the configuration information.
It should be noted that this embodiment is an apparatus embodiment corresponding to the above method embodiment, and all the implementations in the above method embodiment are applicable to this apparatus embodiment, and the same technical effects can be achieved.
An embodiment of the present invention provides a communication system, which includes at least one low-earth satellite and at least one ground terminal, where each low-earth satellite in the at least one low-earth satellite is configured to perform the low-earth satellite autonomous orbit control method in any of the above method embodiments; the at least one ground terminal is configured to perform the low-earth orbit satellite autonomous orbit control method in any of the above method embodiments.
An embodiment of the present invention provides a computer storage medium, where at least one executable instruction is stored in the storage medium, and when the executable instruction is executed, a computing device executes the method for autonomous orbit control of a low-orbit satellite in any of the above method embodiments.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.
Claims (12)
1. An autonomous low-earth orbit satellite tracking method, for a low-earth orbit satellite, the method comprising:
transmitting a request message to at least one ground terminal;
receiving feedback information of the at least one ground terminal, and determining at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain at least one auxiliary ground terminal;
transmitting configuration information to the at least one ancillary terrestrial terminal;
receiving a chirp signal transmitted by the at least one ancillary terrestrial terminal, comprising: when the frequency of the chirp signals indicated by the configuration information is greater than a preset value, receiving the chirp signals respectively sent by the at least one auxiliary ground terminal; when the frequency of the chirp signal indicated by the configuration information is less than or equal to a preset value, receiving the chirp signal simultaneously transmitted by the at least one auxiliary ground terminal;
calculating the current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal;
and executing autonomous orbit control according to the current orbit information.
2. The low-orbit satellite autonomous orbit control method of claim 1, wherein the feedback information comprises at least one of: the system comprises indication information of whether the ground terminal has the capability of assisting the low-orbit satellite to carry out autonomous orbit control, position information of the ground terminal and key information for verifying authorization.
3. The low-earth orbit satellite autonomous orbit control method of claim 1, wherein the configuration information comprises at least one of the following information: transmission time, frequency, transmission power, transmission beam direction of the chirp signal.
4. The method according to claim 1, wherein said receiving the chirp signals respectively transmitted by the at least one ancillary terrestrial terminal comprises:
and respectively receiving the chirp signals by using different time domain resources, or respectively receiving the chirp signals by using different frequency domain resources, or respectively receiving the chirp signals by using different code domain resources.
5. The method according to claim 1, wherein said receiving the chirp signals simultaneously transmitted by the at least one ancillary terrestrial terminal comprises:
and receiving the chirp signal transmitted by adopting the same frequency as the receiving frequency of the synthetic aperture radar.
6. A low-earth orbit satellite autonomous orbit control method is applied to a ground terminal, and comprises the following steps:
receiving a request message sent by a low earth orbit satellite, generating and sending feedback information to the low earth orbit satellite so that the low earth orbit satellite determines at least one ground terminal used for autonomous orbit control assistance as an auxiliary ground terminal according to the feedback information, wherein the ground terminal is the auxiliary ground terminal;
receiving configuration information transmitted by the low orbit satellite, and generating a linear frequency modulation signal in response to the configuration information;
sending the linear frequency modulation signal to the low-orbit satellite so that the low-orbit satellite calculates current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal and executes autonomous orbit control according to the current orbit information;
the transmitting the chirp signal to the low earth orbit satellite includes: when the frequency of the chirp signal indicated by the configuration information is greater than a preset value, the chirp signal is respectively transmitted with other auxiliary ground terminals in the at least one auxiliary ground terminal; and when the frequency of the chirp signal indicated by the configuration information is less than or equal to a preset value, transmitting the chirp signal simultaneously with other auxiliary ground terminals in the at least one auxiliary ground terminal.
7. The method of claim 6, wherein the transmitting the chirp signal separately from other ones of the at least one assisting ground terminal comprises:
and respectively using different time domain resources to send the chirp signals, or respectively using different frequency domain resources to send the chirp signals, or respectively using different code domain resources to send the chirp signals.
8. The method of claim 6, wherein said transmitting the chirp signal simultaneously with other of the at least one assisting terrestrial terminal comprises:
the chirp signal is transmitted using the same frequency as the synthetic aperture radar receive frequency.
9. An autonomous orbit control device for a low-earth orbit satellite, which is arranged on the low-earth orbit satellite, the device comprising:
the first transceiver module is used for sending a request message to at least one ground terminal; receiving feedback information of the at least one ground terminal, and determining at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain at least one auxiliary ground terminal; transmitting configuration information to the at least one ancillary terrestrial terminal; receiving a chirp signal transmitted by the at least one ancillary terrestrial terminal, comprising: when the frequency of the chirp signals indicated by the configuration information is greater than a preset value, receiving the chirp signals respectively sent by the at least one auxiliary ground terminal; when the frequency of the chirp signal indicated by the configuration information is less than or equal to a preset value, receiving the chirp signal simultaneously transmitted by the at least one auxiliary ground terminal;
and the first processing module is used for calculating the current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal and executing autonomous orbit control according to the current orbit information.
10. The low-earth-orbit satellite autonomous orbit control device is characterized by being arranged on a ground terminal, and the device comprises:
the second transceiving module is used for receiving a request message sent by a low-orbit satellite and sending feedback information to the low-orbit satellite so that the low-orbit satellite determines at least one ground terminal for autonomous orbit control assistance according to the feedback information to obtain an auxiliary ground terminal; receiving configuration information sent by the low-orbit satellite, sending a linear frequency modulation signal to the low-orbit satellite, so that the low-orbit satellite calculates current orbit information of the low-orbit satellite by using a synthetic aperture radar algorithm according to the linear frequency modulation signal, and then executing autonomous orbit control according to the current orbit information; the transmitting the chirp signal to the low earth orbit satellite comprises: when the frequency of the chirp signal indicated by the configuration information is greater than a preset value, the chirp signal is respectively transmitted to other auxiliary ground terminals in the at least one auxiliary ground terminal; when the frequency of the chirp signal indicated by the configuration information is less than or equal to a preset value, transmitting the chirp signal simultaneously with other auxiliary ground terminals of the at least one auxiliary ground terminal;
the second processing module is used for responding to the request message and generating feedback information; generating a chirp signal in response to the configuration information.
11. A communication system comprising at least one low earth orbit satellite and at least one ground terminal, each of the at least one low earth orbit satellite being configured to perform the method of any of claims 1-5; the at least one ground terminal is configured to perform the method of any one of claims 6-8.
12. A computer storage medium having stored therein at least one executable instruction that when executed causes a computing device to perform the low-earth orbit satellite autonomous orbit control method of any of claims 1-8.
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