CN117097396B - Method and system for transmitting data between satellite and ground - Google Patents
Method and system for transmitting data between satellite and ground Download PDFInfo
- Publication number
- CN117097396B CN117097396B CN202311330920.5A CN202311330920A CN117097396B CN 117097396 B CN117097396 B CN 117097396B CN 202311330920 A CN202311330920 A CN 202311330920A CN 117097396 B CN117097396 B CN 117097396B
- Authority
- CN
- China
- Prior art keywords
- data
- downlink
- satellite
- ground
- transmitted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 54
- 230000005540 biological transmission Effects 0.000 claims abstract description 175
- 230000006854 communication Effects 0.000 claims abstract description 137
- 238000004891 communication Methods 0.000 claims abstract description 136
- 230000003287 optical effect Effects 0.000 claims description 50
- 238000012805 post-processing Methods 0.000 claims description 33
- 230000007246 mechanism Effects 0.000 claims description 28
- 239000013307 optical fiber Substances 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 12
- 238000009432 framing Methods 0.000 claims description 10
- 230000008707 rearrangement Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 208000032369 Primary transmission Diseases 0.000 claims 1
- 238000004590 computer program Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H04B7/18513—Transmission in a satellite or space-based system
Abstract
The invention relates to the field of data transmission, and provides a method and a system for transmitting data between satellites and the ground, wherein the method comprises the following steps: after the ground terminal determines a downlink data transmission mode based on communication reference data, the downlink data transmission mode is sent to a satellite terminal through an uplink; after the satellite receives the downlink data transmission mode, determining a target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode; and taking the target downlink as a downlink main transmission link, and transmitting the data to be transmitted of the satellite end to the ground end through the downlink main transmission link. According to the scheme provided by the invention, in the satellite-to-ground data transmission process, the downlink data transmission mode can be determined according to the communication reference data, so that a reasonable target downlink is selected from the downlink laser link and the downlink microwave link, the satellite-to-ground communication stability and the data transmission efficiency can be considered, and the stability and the high efficiency of the satellite-to-ground data transmission process are improved.
Description
Technical Field
The present invention relates to the field of data transmission technologies, and in particular, to a method and a system for transmitting data between satellite and earth.
Background
Satellite-to-ground data transmission is the process of transmitting a large amount of load data in space back to the ground end through the satellite end. With the rapid development of remote sensing technology, the satellite load quantity and the resolution of the load are greatly improved, and the generated data quantity is increased in geometric scale.
At present, the traditional satellite-to-ground communication system generally uses laser as a signal transmission medium, and although the laser communication can meet the requirement of satellite-to-ground data high-speed transmission, as the important component of the laser communication channel is a non-uniform atmosphere layer near the ground area, the laser communication has high access elevation angle and is greatly influenced by atmosphere, and the stability and reliability of the communication process are difficult to ensure.
Therefore, it is difficult for the conventional satellite-to-ground communication system to achieve both of the two key factors of communication stability and data transmission rate, resulting in that satellite-to-ground data cannot be efficiently and stably transmitted.
Disclosure of Invention
The invention provides a method and a system for transmitting data between satellites and the ground, which are used for solving the defect that the traditional satellite-to-ground communication system is difficult to consider communication stability and data transmission rate, so that the satellite-to-ground data cannot be transmitted efficiently and stably.
In a first aspect, the present invention provides a method for transmitting data between the ground and the satellite, which is applied to a satellite-to-ground communication system constructed by a ground end and a satellite end, and the method includes:
After the ground terminal determines a downlink data transmission mode based on communication reference data, the downlink data transmission mode is sent to the satellite terminal through an uplink; the communication reference data comprises at least one of weather data, satellite orbit data, laser link construction data and downlink communication quality;
after the satellite receives the downlink data transmission mode, determining a target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode;
and taking the target downlink as a downlink main transmission link, and transmitting the data to be transmitted of the satellite end to the ground end through the downlink main transmission link.
According to the method for transmitting data between the star and the ground, which is provided by the invention, the downlink data transmission mode is determined based on the communication reference data, and the method comprises the following steps:
judging whether the laser link communication condition is met or not based on the communication reference data to obtain a judging result;
if the judging result is that the laser link communication condition is met, determining a downlink data transmission mode as a laser link transmission mode; otherwise, determining the downlink data transmission mode as a microwave link transmission mode.
According to the method for transmitting data between the satellite and the ground, which is provided by the invention, whether the communication condition of the laser link is met is judged based on the communication reference data, and the method comprises the following steps:
judging whether cloud and fog shielding exists in a communication link between a ground end and a satellite end based on the weather data, and obtaining a first result;
judging whether the orbit height of the satellite end is in a preset height range or not based on the satellite orbit data to obtain a second result;
judging whether the downlink laser link is built based on the laser link building data to obtain a third result;
judging whether the communication quality of the downlink reaches the standard or not based on the communication quality of the downlink, and obtaining a fourth result;
determining whether a laser link communication condition is satisfied based on at least one of the first result, the second result, the third result, and the fourth result.
The method for transmitting data between the stars and the ground provided by the invention further comprises the following steps:
and when the satellite end detects abnormal uplink data reception and the downlink main transmission link is a downlink laser link, switching the downlink main transmission link into a downlink microwave link.
According to the method for transmitting data between satellites and the ground, after the data to be transmitted of the satellite end is transmitted to the ground end through the downlink main transmission link, the method further comprises the following steps:
After the ground receives the data to be transmitted, extracting a physical frame sequence number in the data to be transmitted, and carrying out data post-processing on the data to be transmitted according to the physical frame sequence number;
wherein the data post-processing includes data rearrangement and data recovery.
According to the method for transmitting data between satellites and the ground provided by the invention, when the downlink main transmission link is a downlink microwave link and the data to be transmitted comprises satellite orbit data, the method further comprises:
after the ground receives the satellite orbit data, a downlink laser link is built according to the satellite orbit data, and the chain building state of the downlink laser link is fed back to the satellite end through an uplink.
According to the method for transmitting data between satellites and the ground, the data to be transmitted of the satellite end is transmitted to the ground end through the downlink main transmission link, and the method comprises the following steps:
packaging the effective load data through the satellite end to obtain a data packet to be transmitted;
forward encoding and physical framing are carried out on the data packet to be transmitted through the satellite end, so that data to be transmitted is obtained;
modulating the data to be transmitted through the satellite terminal according to the link type corresponding to the downlink main transmission link to obtain a modulation signal;
And transmitting the modulation signal to the ground end through the downlink main transmission link by the satellite end.
In a second aspect, the present invention also provides a system for transmitting data between satellites and earth, including: the ground end is in communication connection with the satellite end;
the ground terminal is used for determining a downlink data transmission mode based on communication reference data and transmitting the downlink data transmission mode to the satellite terminal through an uplink; the communication reference data comprises at least one of weather data, satellite orbit data, laser link construction data and downlink communication quality;
the satellite end is used for receiving the downlink data transmission mode, and determining a target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode; and the target downlink is used as a downlink main transmission link, and the data to be transmitted is transmitted to the ground terminal through the downlink main transmission link.
According to the system for transmitting data between the stars and the ground, the ground end comprises a microwave front-end device, a laser front-end device and a data post-processing device;
the microwave front-end equipment and the laser front-end equipment are connected with the data post-processing equipment;
The microwave front-end equipment is used for establishing a downlink microwave link with the satellite end, the laser front-end equipment is used for establishing a downlink laser link with the satellite end, and the data post-processing equipment is used for carrying out data post-processing on data to be transmitted received by the microwave front-end equipment and the laser front-end equipment.
According to the system for transmitting data between the satellite and the ground, which is provided by the invention, the satellite end comprises a satellite-borne processor, a microwave antenna and satellite-borne optical equipment;
the microwave antenna and the satellite-borne optical equipment are connected with the satellite-borne processor;
the satellite-borne processor is used for packaging the effective load data to obtain a data packet to be transmitted; forward coding and physical frame framing are carried out on the data packet to be transmitted, so that data to be transmitted is obtained; modulating the data to be transmitted according to the link type corresponding to the downlink main transmission link to obtain a modulation signal;
the microwave antenna is used for transmitting microwave modulation signals in the modulation signals to the ground end through a downlink microwave link;
the satellite-borne optical equipment is used for transmitting the laser modulation signals in the modulation signals to the ground end through a downlink laser link.
The method and the system for transmitting data between satellites and the ground provided by the invention have the advantages that the ground end determines the downlink data transmission mode based on communication reference data, the downlink data transmission mode is sent to the satellite end through an uplink, the satellite end determines the target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode, and the target downlink is used as a downlink main transmission link to transmit data to be transmitted of the satellite end to the ground end. In the satellite-to-ground data transmission process, the downlink data transmission mode can be determined according to the communication reference data, so that a reasonable target downlink can be selected from the downlink laser link and the downlink microwave link, the satellite-to-ground communication stability and the data transmission efficiency can be considered, and the stability and the high efficiency of the satellite-to-ground data transmission process are improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for transmitting data between satellites and earth according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a downlink handoff process from satellite entry to satellite exit;
FIG. 3 is a schematic diagram of a system for inter-satellite data transmission according to an embodiment of the present invention;
FIG. 4 is a second schematic diagram of a system for inter-satellite data transmission according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While embodiments of the present invention are illustrated in the drawings, it should be understood that the present invention 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 invention to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the invention. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The embodiment relates to the field of data transmission, and in particular can be applied to a data transmission scene after a communication link is established between a satellite end and a ground end. In the related art, in a satellite-ground communication system built by a satellite end and a ground end, the satellite end and the communication end generally perform downlink communication through a laser link, a microwave link is used as an auxiliary link for the satellite end to transmit filling data, the laser link is high in data transmission efficiency, but is influenced by external environmental factors such as weather, a satellite-ground laser communication channel changes in real time, so that a received optical signal is severely interfered, a communication error rate is increased, and data transmission stability is low.
In particular, since the transmission of laser light in the atmosphere is inevitably affected by the atmosphere, such effects mainly include attenuation effects and turbulence effects. When the laser is transmitted in the atmosphere, the laser interacts with particles such as atmospheric molecules, aerosol, water vapor and the like, and the interaction directly leads to optical wavefront distortion, and the received optical power fluctuates and decays, so that the performance of a communication system is deteriorated.
The turbulence effect of the atmosphere causes beam drift, beam expansion, and light intensity flicker. Because the atmosphere is dynamically changed in real time, the refractive index of the atmosphere is randomly fluctuated, and the turbulent flow effect further changes the random change of the light field of the light beam, and the random change is macroscopically represented by the spatial coherence degradation of the light field, the fluctuant of the light beam and the fluctuation of the arrival angle. The absorption and scattering effects of the aerosol in the atmosphere channel on the laser transmission and the atmospheric turbulence cause the intensity of the signal light to flicker, which seriously reduces the signal light power, causes the light beam quality of the signal light at the receiving end to be poor, reduces the signal-to-noise ratio of the received signal, and reduces the communication performance of the satellite-to-ground communication system and the reliability of the communication link.
In addition, except for extreme weather conditions such as rain, cloud, fog and the like, the atmospheric turbulence, the atmospheric scattering and the atmospheric absorption under the condition of better weather conditions can influence the quality of satellite-ground laser beams, thereby influencing satellite-ground laser communication.
Therefore, at present, when the satellite end and the ground end perform data transmission, the problem that the stability and the efficiency of data transmission are difficult to be simultaneously achieved exists.
In view of the foregoing, the present invention provides a corresponding solution, and details of a method and a system for inter-satellite data transmission provided by the embodiments of the present invention are described below with reference to fig. 1 to 5.
Referring to fig. 1, an embodiment of the present invention provides a method for transmitting data between satellite and earth, where the method may be applied to a satellite-earth communication system constructed by a ground end and a satellite end, and the method specifically includes:
step 110: and after the ground terminal determines the downlink data transmission mode based on the communication reference data, the downlink data transmission mode is sent to the satellite terminal through an uplink. The communication reference data comprises at least one of weather data, satellite orbit data, laser link construction data and downlink communication quality.
It may be appreciated that the ground end may periodically acquire communication reference data according to a set sampling period, and in this embodiment, the communication reference data may represent a downlink communication influence condition between the ground end and the satellite end, and may specifically include one or more associated parameters that affect downlink communication quality between the ground end and the satellite end, such as weather data, satellite orbit data, laser link establishment data, downlink communication quality, and so on.
The weather data mainly characterizes cloud and fog conditions near a downlink communication link between a ground end and a satellite end, namely whether cloud and fog shielding exists or not, and if the cloud and fog shielding exists, the downlink laser link is greatly influenced, so that the downlink laser link cannot normally transmit data.
The satellite orbit data mainly represents the orbit height condition of the satellite end, namely whether the satellite orbit height meets the requirement or not, and if the satellite orbit height is not in a preset range, the normal communication of the laser link is difficult to ensure.
The link construction data of the laser link mainly characterizes the link construction condition of the downlink laser link, and if the downlink laser link is not established or is in the establishment, the link construction data indicates that the downlink laser link does not meet the use condition, and the data transmission can not be carried out through the downlink laser link.
The downlink communication quality mainly characterizes the communication reliability of the downlink, and if the downlink data retransmission rate is high, the downlink communication quality is lower, and the downlink laser link is difficult to meet the normal communication condition and needs to be switched in time.
In this embodiment, the downlink data transmission mode is mainly used to characterize a transmission mode of downlink data, for example, may be a laser link transmission mode or a microwave link transmission mode.
Step 120: after the satellite receives the downlink data transmission mode, determining a target downlink from the downlink laser link and the downlink microwave link according to the downlink data transmission mode.
It can be understood that the downlink data transmission mode can be used as a decision basis for downlink switching of the satellite, and if the downlink data transmission mode is a laser link transmission mode, the satellite can use the downlink laser link as a target downlink. If the downlink data transmission mode is a microwave link transmission mode, the satellite end can take the downlink microwave link as a target downlink. Therefore, the downlink switching can be performed in a targeted manner in combination with the actual communication scene, so as to ensure the rationality of the downlink selection.
Step 130: and taking the target downlink as a downlink main transmission link, and transmitting the data to be transmitted of the satellite end to the ground end through the downlink main transmission link.
According to the scheme provided by the embodiment, the downlink data transmission mode is determined on the ground side based on the communication reference data, and then the satellite side determines the target downlink from the downlink laser link and the downlink microwave link according to the downlink data transmission mode, so that the appropriate downlink in the current scene can be selected in a targeted manner by combining the communication reference data.
Specifically, in the satellite-to-ground data transmission process, a downlink laser link is preferentially adopted, and when the downlink laser link is unavailable due to factors such as low elevation angle, rain and fog shielding, link interruption or link non-establishment, the downlink laser link can be automatically switched to a downlink microwave link, the continuity of data is ensured, the satellite-to-ground data transmission capability is improved, and the transmission efficiency and the transmission stability can be considered in the downlink data transmission process of a satellite end and a ground end.
In one embodiment, determining the downlink data transmission mode based on the communication reference data specifically includes:
judging whether the laser link communication condition is met or not based on the communication reference data to obtain a judging result;
if the judging result is that the laser link communication condition is met, determining a downlink data transmission mode as a laser link transmission mode; otherwise, determining the downlink data transmission mode as a microwave link transmission mode.
In this embodiment, the ground terminal may determine whether the communication condition of the laser link is suitable according to the weather condition, the satellite orbit height, the laser link establishment condition, the downlink laser link communication quality, and other information, so as to pointedly select the most suitable downlink data transmission mode in the current scene, and feed back to the satellite terminal through the uplink.
In one embodiment, determining whether the laser link communication condition is satisfied based on the communication reference data specifically includes:
judging whether cloud and fog shielding exists in a communication link between a ground end and a satellite end based on weather data, and obtaining a first result;
judging whether the orbit height of the satellite end is in a preset height range or not based on satellite orbit data to obtain a second result;
judging whether the downlink laser link is built based on the laser link building data to obtain a third result;
judging whether the communication quality of the downlink reaches the standard or not based on the communication quality of the downlink, and obtaining a fourth result;
based on at least one of the first result, the second result, the third result, and the fourth result, it is determined whether the laser link communication condition is satisfied.
It can be understood that, because the communication reference data may include one or more data, when judging whether the laser link communication condition is satisfied, the judgment can be made based on one data in the communication reference data, or the judgment can be made by combining any data combination, specifically, the selection can be made according to the actual scene requirement and the data transmission precision combination.
In an embodiment, the method for transmitting data between satellites and ground provided by the embodiment of the invention may further include:
When the satellite end detects abnormal uplink data reception and the downlink main transmission link is a downlink laser link, the downlink main transmission link is switched to a downlink microwave link.
In general, the uplink data transmission process is relatively stable, and if the satellite end detects that the uplink data is abnormally received, a part of reasons may be that the downlink data of the satellite end is not sent to the ground end in time, so that the ground end cannot normally receive the downlink data, and further response data cannot be fed back to the satellite end.
Therefore, when the satellite end detects that the uplink data is abnormally received, if the downlink main transmission link is the downlink laser link, the downlink laser link is unstable in transmission at the moment, and the downlink main transmission link can be switched to the downlink microwave link so as to ensure the basic data transmission requirement.
In an embodiment, after transmitting the pending data of the satellite end to the ground end through the downlink main transmission link, the method may further include:
and after the ground receives the data to be transmitted, extracting a physical frame sequence number in the data to be transmitted, and carrying out data post-processing on the data to be transmitted according to the physical frame sequence number.
Wherein the data post-processing includes data reordering and data recovery.
In this embodiment, on the one hand, the satellite end may perform adaptive switching between microwave and laser transmission modes according to the downlink data transmission mode acquired by the uplink. On the other hand, the satellite end can fill the information such as the physical frame number and the like into the downlink physical frame, and transmit the to-be-transmitted data comprising the downlink physical frame to the ground end through the target downlink.
After receiving the data transmitted by the satellite terminal, the ground terminal can extract the physical frame sequence number at the moment because of the possible downlink switching process in the transmission process, perform data rearrangement operation according to the physical frame sequence number, determine the lost data through the rearrangement operation, and feed back the lost data through the uplink so as to perform data recovery operation through a data retransmission mode.
In an embodiment, when the downlink main transmission link is a downlink microwave link and the data to be transmitted includes satellite orbit data, the method may further include:
after the ground receives the satellite orbit data, the downlink laser link is built according to the satellite orbit data, and the building state of the downlink laser link is fed back to the satellite end through the uplink.
In this embodiment, when the downlink laser link is initially established and the link is interrupted, the ground end needs to acquire high-precision satellite orbit information. At the moment, the high-precision satellite orbit data can be issued in real time through the downlink microwave link as guide, the downlink laser link can be assisted to quickly and stably build a link, meanwhile, high-precision tracking can be realized when the downlink laser link is shielded, and further, the quick reconstruction of the downlink laser link is ensured when the shielding disappears, so that when the laser link is suitable in communication condition, the laser communication is quickly switched from microwave communication to laser communication, and the comprehensive data transmission capability is improved.
In some embodiments, during the period from the entry of the satellite to the exit of the satellite, the downlink switching process between the satellite end and the ground end may be referred to as fig. 2, as shown in fig. 2, after the entry of the satellite, the downlink microwave link may be established by first establishing a microwave link, downloading high-precision satellite orbit data by using a virtual channel in a microwave communication manner, and performing laser link establishment.
After the downlink laser link is built, the satellite end switches the downlink main transmission link to the downlink laser link, and the satellite end and the ground end transmit data through laser communication, so that the downlink microwave link can be used for transmitting filling data.
When the cloud and fog shielding exists, the downlink laser link is interrupted, at the moment, the satellite terminal is autonomously switched to the downlink microwave link, and high-precision satellite orbit data are transmitted to the ground terminal again in a microwave communication mode, so that the downlink laser link is rebuilt. After the downlink laser link is rebuilt, the satellite end can switch the downlink main transmission link to the downlink laser link again, so that the satellite end can communicate with the ground end in a laser communication mode.
And as the satellite end gradually gets away from the ground end, the downlink laser link communication is ended, and then the satellite end switches the downlink main transmission link to the downlink microwave link and communicates with the ground end through the downlink microwave link until the satellite leaves the mirror.
In one embodiment, the method for transmitting the data to be transmitted from the satellite end to the ground end through the downlink main transmission link specifically includes:
packaging the effective load data through a satellite end to obtain a data packet to be transmitted;
forward encoding and physical framing are carried out on the data packet to be transmitted through a satellite end, so that data to be transmitted is obtained;
modulating data to be transmitted according to a link type corresponding to a downlink main transmission link through a satellite end to obtain a modulation signal;
and transmitting the modulated signal to the ground end through the satellite end by the downlink main transmission link.
In this embodiment, the microwave portion and the laser portion at the satellite end share the satellite-borne processor, so that service data can be framed, and modulation signals can be generated through microwaves and lasers. The ground terminal can receive the laser modulation signal or the microwave modulation signal and carry out post-processing operations such as data demodulation, data rearrangement, data recovery and the like through the high-speed signal processing baseband.
According to the method for transmitting data between the satellites and the ground, the laser communication and microwave data transmission integrated thought is adopted, on one hand, the characteristics of low working elevation angle and strong weather adaptability of a downlink microwave link can be utilized to provide guiding information before laser link establishment for the ground end, and meanwhile, when cloud and fog shielding is severe, the lowest data downloading amount of the whole satellite and ground communication system can be ensured. On the other hand, by utilizing the ultra-high-speed data transmission capability of the downlink laser link, the effective data transmitted by the satellite end is rapidly downloaded in a good airspace under the atmospheric condition, the overall availability and the comprehensive data transmission capability of the satellite-to-ground communication system are improved, and the balance of the data transmission efficiency and the transmission stability is realized.
Based on the same general inventive concept, the present invention also protects a system for transmitting data between satellites and the earth, wherein the system for transmitting data between satellites and the earth provided by the present invention is described below, and the system for transmitting data between satellites and the method for transmitting data between satellites described below can be referred to correspondingly.
Referring to fig. 3, a system for transmitting data between satellites and earth according to an embodiment of the present invention includes: the ground side 210 and the satellite side 220, the ground side 210 being communicatively coupled to the satellite side 220.
The ground terminal 210 is configured to determine a downlink data transmission mode based on the communication reference data, and transmit the downlink data transmission mode to the satellite terminal 220 through an uplink; the communication reference data comprises at least one of weather data, satellite orbit data, laser link construction data and downlink communication quality.
The satellite end 220 is configured to receive a downlink data transmission mode, and determine a target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode; and the target downlink is used as a downlink main transmission link, and the data to be transmitted is transmitted to the ground end 210 through the downlink main transmission link.
In this embodiment, the terrestrial end 210 may transmit data to the satellite end 220 via an uplink, and the satellite end 220 may transmit data to the terrestrial end 210 via a downlink, where the adaptive switching between the laser link and the microwave link is mainly aimed at the downlink.
In some embodiments, the ground side 210 and the satellite side 220 each have a corresponding hardware structure so as to implement normal interaction of data, and fig. 4 illustrates a specific structure of the ground side 210 and the satellite side 220.
In one embodiment, referring to fig. 4, satellite end 220 specifically includes a satellite processor 310, a microwave antenna 320, and a satellite optic 330.
Both the microwave antenna 320 and the on-board optical device 330 are connected to the on-board processor 310.
The on-board processor 310 is configured to package the payload data to obtain a data packet to be transmitted; forward coding and physical framing are carried out on the data packet to be transmitted, and data to be transmitted is obtained; modulating data to be transmitted according to the link type corresponding to the downlink main transmission link to obtain a modulation signal.
The microwave antenna 320 is used to transmit the microwave modulation signal of the modulation signal to the ground terminal 210 through the downlink microwave link.
The satellite-borne optical device 330 is configured to transmit the laser modulation signal of the modulation signal to the ground terminal 210 through the downlink laser link.
In this embodiment, the payload data in the satellite 220 is stored in a satellite-borne memory, which may be a fixed memory, and the payload data of the satellite may be stored centrally.
The satellite-borne processor 310 may obtain payload data according to the data packet request, and package the payload data to generate a data packet to be transmitted; the data packets to be transmitted are buffered in a data packet buffer area, then forward encoding and physical frame framing are carried out on the data in the data packets to be transmitted according to the physical frame request, and the data packets are buffered in the physical frame buffer area, and then microwave modulation signals or laser modulation signals are generated.
The microwave modulation signal is transmitted to the microwave antenna 320, specifically, referring to fig. 4, the microwave antenna 320 includes an up-converter 3201, a power amplifier 3202 and an antenna body 3203, and the microwave modulation signal is processed by the up-converter 3201 and the power amplifier 3202 and then transmitted to the ground end 210 through an atmospheric channel by the antenna body 3203 in a microwave downlink manner.
The laser modulation signal is transmitted to the spaceborne optical device 330, and the spaceborne optical device 330 may be an optical head, specifically, referring to fig. 4, the spaceborne optical device 330 specifically includes a spaceborne photoelectric modulator 3301, a spaceborne optical fiber power amplifier 3302, a spaceborne optical processor 3303, a first servo mechanism 3304 and a spaceborne photoelectric detector 3305, and after a series of processing of the spaceborne photoelectric modulator 3301, the spaceborne optical fiber power amplifier 3302 and the spaceborne optical processor 3303, the laser modulation signal may be transmitted to the first servo mechanism 3304, and then transmitted to the ground end 210 in a laser downlink manner through the first servo mechanism 3304.
In one embodiment, referring to fig. 4, the floor end 210 may include a microwave front end 340, a laser front end 350, and a data post-processing device 360.
The microwave front-end device 340 and the laser front-end device 350 are both connected to a data post-processing device 360.
The microwave front-end device 340 is configured to establish a downlink microwave link with the satellite end 220, the laser front-end device 350 is configured to establish a downlink laser link with the satellite end 220, and the data post-processing device 360 is configured to perform data post-processing on the data to be transmitted received by the microwave front-end device 340 and the laser front-end device 350.
Referring to fig. 4, the microwave front end 340 includes a second servo 3401, a microwave receiving antenna 3402, a low noise amplifier 3403 and a down converter 3404, and the microwave modulation signal transmitted from the satellite 220 is transmitted to the microwave receiving antenna 3402 through the second servo 3401, received by the microwave receiving antenna 3402, processed by the low noise amplifier 3403 and the down converter 3404, and then transmitted to the data post-processing device 360.
Referring to fig. 4, the laser front-end device 350 specifically includes a third servo mechanism 3501, a terrestrial optical device 3502, a terrestrial optical processor 3503, a terrestrial photodetector 3504, a terrestrial photoelectric modulator 3505, and a terrestrial optical fiber power amplifier 3506, the laser modulation signal is transmitted to the terrestrial optical processor 3503 through the third servo mechanism 3501 and the terrestrial optical device 3502, and after the terrestrial optical processor 3503 performs the capturing tracking, the adaptive correction, and the optical fiber coupling processing, the laser modulation signal is transmitted to the data post-processing device 360 through the terrestrial photodetector 3504.
The data post-processing device 360 may receive and process data through the integrated data receiving baseband, referring to fig. 4, the data post-processing device 360 specifically includes a data demodulator 3601 and a decoder 3602, modulation signals transmitted from the microwave front-end device 340 and the laser front-end device 350 are sent to the data demodulator 3601 to be demodulated, the demodulated data is further subjected to physical frame synchronization processing, the synchronized data is sent to the decoder 3602 to be decoded, after the validity of the physical frame is determined, the physical frame is framed through a downlink frame sequence number, and a data post-processing function is realized.
In addition, after the user uplink data stream is subjected to physical frame framing in the data post-processing device 360, the uplink data stream is sent to the ground optical device 3502 through the ground optical modulator 3505 and the ground optical fiber power amplifier 3506 in the laser front-end device 350, and then is transmitted to the first servo mechanism 3304 in the satellite-borne optical device 330 through the laser uplink through the third servo mechanism 3501, and the data output from the first servo mechanism 3304 is transmitted to the satellite-borne processor 310 in the form of an uplink signal after being subjected to data demodulation, physical frame synchronization, downlink frame sequence number extraction and other processing by the satellite-borne processor, so that the uplink data is transmitted.
In summary, in the system for inter-satellite data transmission provided in this embodiment, since the downlink data transmission mode may be determined according to the communication reference data in the inter-satellite data transmission process, a reasonable target downlink may be selected from the downlink laser link and the downlink microwave link. The advantages and complementarity of laser communication and microwave communication are fully considered, and when a laser communication link is unavailable, the continuity of data transmission can be ensured, and the reliability of satellite-to-ground data transmission is improved. The satellite-to-ground communication stability and the data transmission efficiency can be considered, so that the stability and the high efficiency of the satellite-to-ground data transmission process are improved.
The specific manner in which the operations are performed by the various components of the systems of the embodiments described above have been described in detail in connection with embodiments of the method, and will not be described in detail herein.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
As shown in fig. 5, the electronic device may include: processor 410, communication interface (Communications Interface) 420, memory 430 and communication bus 440, wherein processor 410, communication interface 420 and memory 430 communicate with each other via communication bus 440. The processor 410 may invoke logic instructions in the memory 430 to perform the method for inter-satellite transmission of data provided by the above embodiments, the method comprising: after the ground terminal determines a downlink data transmission mode based on communication reference data, the downlink data transmission mode is sent to a satellite terminal through an uplink; the communication reference data comprises at least one of weather data, satellite orbit data, laser link construction data and downlink communication quality; after the satellite receives the downlink data transmission mode, determining a target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode; and taking the target downlink as a downlink main transmission link, and transmitting the data to be transmitted of the satellite end to the ground end through the downlink main transmission link.
Further, the logic instructions in the memory 430 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, where the computer program when executed by a processor can perform the method for inter-satellite data transmission provided in the foregoing embodiment, where the method includes: after the ground terminal determines a downlink data transmission mode based on communication reference data, the downlink data transmission mode is sent to a satellite terminal through an uplink; the communication reference data comprises at least one of weather data, satellite orbit data, laser link construction data and downlink communication quality; after the satellite receives the downlink data transmission mode, determining a target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode; and taking the target downlink as a downlink main transmission link, and transmitting the data to be transmitted of the satellite end to the ground end through the downlink main transmission link.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the method for inter-satellite transmission data provided by the above embodiment, the method comprising: after the ground terminal determines a downlink data transmission mode based on communication reference data, the downlink data transmission mode is sent to a satellite terminal through an uplink; the communication reference data comprises at least one of weather data, satellite orbit data, laser link construction data and downlink communication quality; after the satellite receives the downlink data transmission mode, determining a target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode; and taking the target downlink as a downlink main transmission link, and transmitting the data to be transmitted of the satellite end to the ground end through the downlink main transmission link.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A method for transmitting data between satellites and earth, which is applied to a satellite-earth communication system constructed by a ground terminal and a satellite terminal, the method comprising:
after the ground terminal determines a downlink data transmission mode based on communication reference data, the downlink data transmission mode is sent to the satellite terminal through an uplink; the ground terminal periodically acquires communication reference data according to a set sampling period, wherein the communication reference data comprises weather data, satellite orbit data, laser link construction data and downlink communication quality, the downlink communication quality is used for representing the communication reliability of a downlink, and if the retransmission rate of the downlink data is high, the downlink communication quality is low;
after the satellite receives the downlink data transmission mode, determining a target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode;
the target downlink is used as a downlink main transmission link, and payload data is packaged through the satellite end to obtain a data packet to be transmitted; forward encoding and physical framing are carried out on the data packet to be transmitted through the satellite end, so that data to be transmitted is obtained; modulating the data to be transmitted through the satellite terminal according to the link type corresponding to the downlink main transmission link to obtain a modulation signal;
The satellite terminal comprises a satellite-borne processor, a microwave antenna and satellite-borne optical equipment, wherein microwave modulation signals in the modulation signals are transmitted to the microwave antenna, the microwave antenna comprises an up-converter, a power amplifier and an antenna body, and the microwave modulation signals are transmitted to the ground terminal through an atmospheric channel in a microwave downlink mode through the antenna body after being processed by the up-converter and the power amplifier;
the laser modulation signals in the modulation signals are transmitted to a satellite-borne optical device, the satellite-borne optical device specifically comprises a satellite-borne photoelectric modulator, a satellite-borne optical fiber power amplifier, a satellite-borne optical processor, a first servo mechanism and a satellite-borne photoelectric detector, and the laser modulation signals are transmitted to the first servo mechanism after being processed by the satellite-borne photoelectric modulator, the satellite-borne optical fiber power amplifier and the satellite-borne optical processor in a series, and are transmitted to the ground end in a laser downlink mode through the first servo mechanism;
the ground end comprises microwave front-end equipment, laser front-end equipment and data post-processing equipment, the microwave front-end equipment comprises a second servo mechanism, a microwave receiving antenna, a low noise amplifier and a down converter, microwave modulation signals transmitted by the satellite end are transmitted to the microwave receiving antenna through the second servo mechanism, received by the microwave receiving antenna, processed by the low noise amplifier and the down converter and transmitted to the data post-processing equipment;
The laser front-end equipment specifically comprises a third servo mechanism, ground optical equipment, a ground optical processor, a ground photoelectric detector, a ground photoelectric modulator and a ground optical fiber power amplifier, wherein laser modulation signals are transmitted to the ground optical processor through the third servo mechanism and the ground optical equipment, and are transmitted to the data post-processing equipment through the ground photoelectric detector after the ground optical processor performs capturing and tracking, self-adaptive correction and optical fiber coupling processing;
the data post-processing device specifically comprises a data demodulator and a decoder, modulation signals transmitted by the microwave front-end device and the laser front-end device are sent to the data demodulator for demodulation, the demodulated data are further subjected to physical frame synchronization processing, the data after synchronization processing are sent to the decoder for decoding, and after the validity of the physical frame is judged, the physical frame is framed through a downlink frame sequence number, so that the data post-processing function is realized;
after the user uplink data stream is subjected to physical frame framing in the data post-processing equipment, the uplink data is sent into the ground optical equipment through the ground photoelectric modulator and the ground optical fiber power amplifier, then is transmitted to a first servo mechanism in the satellite-borne optical equipment through a laser uplink through a third servo mechanism, the data output from the first servo mechanism is transmitted into a satellite-borne processor in the form of an uplink signal after being processed by a satellite-borne optical processor and a satellite-borne photoelectric detector, and the uplink signal is subjected to data demodulation, physical frame synchronization and downlink frame sequence number extraction processing by the satellite-borne processor and then is buffered, so that the uplink data transmission is realized.
2. The method of inter-satellite transmission of data according to claim 1, wherein determining the downlink data transmission mode based on the communication reference data comprises:
judging whether the laser link communication condition is met or not based on the communication reference data to obtain a judging result;
if the judging result is that the laser link communication condition is met, determining a downlink data transmission mode as a laser link transmission mode; otherwise, determining the downlink data transmission mode as a microwave link transmission mode.
3. The method of inter-satellite to ground transmission of data according to claim 2, wherein determining whether the laser link communication condition is satisfied based on the communication reference data comprises:
judging whether cloud and fog shielding exists in a communication link between a ground end and a satellite end based on the weather data, and obtaining a first result;
judging whether the orbit height of the satellite end is in a preset height range or not based on the satellite orbit data to obtain a second result;
judging whether the downlink laser link is built based on the laser link building data to obtain a third result;
judging whether the communication quality of the downlink reaches the standard or not based on the communication quality of the downlink, and obtaining a fourth result;
And determining whether laser link communication conditions are met based on the first result, the second result, the third result and the fourth result.
4. The method for transmitting data between satellites in accordance with claim 1, further comprising:
and when the satellite end detects abnormal uplink data reception and the downlink main transmission link is a downlink laser link, switching the downlink main transmission link into a downlink microwave link.
5. The method of inter-satellite transmission of data according to claim 1, wherein after transmitting the data to be transmitted of the satellite side to the terrestrial side through the downlink main transmission link, the method further comprises:
after the ground receives the data to be transmitted, extracting a physical frame sequence number in the data to be transmitted, and carrying out data post-processing on the data to be transmitted according to the physical frame sequence number;
wherein the data post-processing includes data rearrangement and data recovery.
6. The method of inter-satellite transmission of data according to claim 1, wherein when the downlink primary transmission link is a downlink microwave link and the data to be transmitted comprises satellite orbit data, the method further comprises:
After the ground receives the satellite orbit data, a downlink laser link is built according to the satellite orbit data, and the chain building state of the downlink laser link is fed back to the satellite end through an uplink.
7. A system for transmitting data between satellites, comprising: the ground end is in communication connection with the satellite end;
the ground terminal is used for determining a downlink data transmission mode based on communication reference data and transmitting the downlink data transmission mode to the satellite terminal through an uplink; the ground terminal periodically acquires communication reference data according to a set sampling period, wherein the communication reference data comprises weather data, satellite orbit data, laser link construction data and downlink communication quality, the downlink communication quality is used for representing the communication reliability of a downlink, and if the retransmission rate of the downlink data is high, the downlink communication quality is low;
the satellite end is used for receiving the downlink data transmission mode, and determining a target downlink from a downlink laser link and a downlink microwave link according to the downlink data transmission mode; the target downlink is used as a downlink main transmission link, and effective load data are packed to obtain a data packet to be transmitted; forward coding and physical frame framing are carried out on the data packet to be transmitted, so that data to be transmitted is obtained; modulating the data to be transmitted according to the link type corresponding to the downlink main transmission link to obtain a modulation signal;
Wherein the satellite terminal comprises a satellite-borne processor, a microwave antenna and satellite-borne optical equipment,
the microwave modulation signals in the modulation signals are transmitted to a microwave antenna, the microwave antenna comprises an up-converter, a power amplifier and an antenna body, and after being processed by the up-converter and the power amplifier, the microwave modulation signals are transmitted to the ground end through an atmosphere channel in a microwave downlink mode through the antenna body;
the laser modulation signals in the modulation signals are transmitted to a satellite-borne optical device, the satellite-borne optical device specifically comprises a satellite-borne photoelectric modulator, a satellite-borne optical fiber power amplifier, a satellite-borne optical processor, a first servo mechanism and a satellite-borne photoelectric detector, and the laser modulation signals are transmitted to the first servo mechanism after being processed by the satellite-borne photoelectric modulator, the satellite-borne optical fiber power amplifier and the satellite-borne optical processor in a series, and are transmitted to the ground end in a laser downlink mode through the first servo mechanism;
the ground end comprises microwave front-end equipment, laser front-end equipment and data post-processing equipment, the microwave front-end equipment comprises a second servo mechanism, a microwave receiving antenna, a low noise amplifier and a down converter, microwave modulation signals transmitted by the satellite end are transmitted to the microwave receiving antenna through the second servo mechanism, received by the microwave receiving antenna, processed by the low noise amplifier and the down converter and transmitted to the data post-processing equipment;
The laser front-end equipment specifically comprises a third servo mechanism, ground optical equipment, a ground optical processor, a ground photoelectric detector, a ground photoelectric modulator and a ground optical fiber power amplifier, wherein laser modulation signals are transmitted to the ground optical processor through the third servo mechanism and the ground optical equipment, and are transmitted to the data post-processing equipment through the ground photoelectric detector after the ground optical processor performs capturing and tracking, self-adaptive correction and optical fiber coupling processing;
the data post-processing device specifically comprises a data demodulator and a decoder, modulation signals transmitted by the microwave front-end device and the laser front-end device are sent to the data demodulator for demodulation, the demodulated data are further subjected to physical frame synchronization processing, the data after synchronization processing are sent to the decoder for decoding, and after the validity of the physical frame is judged, the physical frame is framed through a downlink frame sequence number, so that the data post-processing function is realized;
after the user uplink data stream is subjected to physical frame framing in the data post-processing equipment, the uplink data is sent into the ground optical equipment through the ground photoelectric modulator and the ground optical fiber power amplifier, then is transmitted to a first servo mechanism in the satellite-borne optical equipment through a laser uplink through a third servo mechanism, the data output from the first servo mechanism is transmitted into a satellite-borne processor in the form of an uplink signal after being processed by a satellite-borne optical processor and a satellite-borne photoelectric detector, and the uplink signal is subjected to data demodulation, physical frame synchronization and downlink frame sequence number extraction processing by the satellite-borne processor and then is buffered, so that the uplink data transmission is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311330920.5A CN117097396B (en) | 2023-10-16 | 2023-10-16 | Method and system for transmitting data between satellite and ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311330920.5A CN117097396B (en) | 2023-10-16 | 2023-10-16 | Method and system for transmitting data between satellite and ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117097396A CN117097396A (en) | 2023-11-21 |
| CN117097396B true CN117097396B (en) | 2024-03-22 |
Family
ID=88770080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311330920.5A Active CN117097396B (en) | 2023-10-16 | 2023-10-16 | Method and system for transmitting data between satellite and ground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117097396B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117478209A (en) * | 2023-12-28 | 2024-01-30 | 中国电子科技集团公司第五十四研究所 | High availability laser microwave hybrid transmission satellite communication system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115694638A (en) * | 2022-11-03 | 2023-02-03 | 上海航天测控通信研究所 | Laser microwave mixing self-adaptive satellite-ground data transmission device |
| CN116781143A (en) * | 2023-06-21 | 2023-09-19 | 中国人民解放军空军工程大学 | Satellite-ground laser microwave cooperative transmission method under complex weather condition |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9991957B2 (en) * | 2015-11-16 | 2018-06-05 | Arizona Board Of Regents On Behalf Of Arizona State University | Low-cost, long-distance, high-bandwidth laser communication system for small mobile devices and spacecraft |
-
2023
- 2023-10-16 CN CN202311330920.5A patent/CN117097396B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115694638A (en) * | 2022-11-03 | 2023-02-03 | 上海航天测控通信研究所 | Laser microwave mixing self-adaptive satellite-ground data transmission device |
| CN116781143A (en) * | 2023-06-21 | 2023-09-19 | 中国人民解放军空军工程大学 | Satellite-ground laser microwave cooperative transmission method under complex weather condition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117097396A (en) | 2023-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10680712B2 (en) | Network of extremely high burst rate optical downlinks | |
| CN109792293B (en) | Dynamic reverse link retransmission timeline in a satellite communication system | |
| CN117097396B (en) | Method and system for transmitting data between satellite and ground | |
| Chan | Optical satellite networks | |
| EP3094014B1 (en) | Hybrid spatial system based on a constellation of satellites in low earth orbit acting as spatial repeaters to improve the transmission and reception of geostationary signals | |
| KR101687047B1 (en) | Adaptive coding modulation apparatus and method of forward link in satellite communication | |
| US5864547A (en) | Method and system for controlling uplink power in a high data rate satellite communication system employing on-board demodulation and remodulation | |
| JP4407901B2 (en) | Method and system using transmit sequential roving for identifying interfering mobile terminals | |
| KR102262762B1 (en) | RF-FSO linkage method and ground station system performing the same | |
| EP3507919A1 (en) | Satellite system comprising satellites in leo and other orbits | |
| EP1320204B1 (en) | Method and apparatus using variations in power modulation to identify an interfering mobile terminal | |
| CA3048977C (en) | Method and apparatus for snr threshold adjustment using monitoring of fec iterations | |
| CN112511216B (en) | Adaptive coding modulation method and system for low-earth-orbit satellite | |
| CN114745051B (en) | Control method and device for satellite-ground laser communication | |
| CN113258956A (en) | Satellite communication signal processing method, device, electronic equipment and medium | |
| US20110009054A1 (en) | Transmit frequency precorrection for satellite terminals | |
| Oppenhauser et al. | European SILEX project and other advanced concepts for optical space communications | |
| US20230141927A1 (en) | Overlay of a forward link on broadband satellite signals | |
| Dessouky et al. | The ACTS mobile terminal (AMT) | |
| Knapek et al. | Optical high-capacity satellite downlinks via high-altitude platform relays | |
| CN105450281B (en) | A kind of system and method to more parts of same subscriber machine check-in signal diversity receptions | |
| CN114567402B (en) | Satellite-ground channel prediction method, device, equipment and storage medium | |
| WO2023035276A1 (en) | Uplink transmission method and apparatus, device and storage medium | |
| Lay et al. | A communication protocol for mobile satellite systems affected by rain attenuation | |
| Zhang et al. | Analysis of GEO Satellite Relay Coded Systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |