Satellite-ground linkage radio monitoring system and method based on low-orbit satellite

Abstract

The present invention discloses a satellite-to-ground linkage radio monitoring system and method based on a low-orbit satellite, which relates to the field of wireless communications and includes: a radio monitoring payload, deployed on a low-orbit satellite, for performing beam tracking of the radio system of the satellite to be monitored according to the radio monitoring task, performing coarse processing on the collected signals to obtain signal data, sending the signal data to the low-orbit satellite so that the low-orbit satellite can adjust its own position and the beam pointing of the radio monitoring payload, and performing time and space marking on the signal data before sending it to a ground station; a radio monitoring data processing module, deployed on the ground station, for generating a radio monitoring task based on the operating orbit and beam coverage of the radio system of the satellite to be monitored and annotating it to the low-orbit satellite, performing fine processing on the signal data to obtain the operating orbit and beam coverage of the radio system of the satellite to be monitored, and updating the radio monitoring task. The present invention can realize satellite-to-ground linkage radio monitoring and monitor signals in multiple frequency bands.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a satellite-to-ground linkage radio monitoring system and method based on a low-orbit satellite. Background Art

[0002] With the advancement of technology, radio applications and radio communications have become indispensable in our daily lives. Currently, a large number of satellite-based radio monitoring systems exist, including the US White Cloud series, SB-WAAS, Russian Lotus series, Russian Peony series, French Swarm, Hawkeye 360, Kleos Space, and Unseenlabs. These systems primarily utilize low-orbit satellite platforms, approximately 500-1000 km above the ground, to provide spectrum situational awareness and locate signal emitters. These systems, such as the US White Cloud, SB-WAAS, Russian Lotus, and Russian Peony series, have payloads ranging from 600-7000 kg and utilize positioning methods such as three-satellite time-frequency difference positioning, two-satellite time-frequency difference positioning, and single-satellite interferometry direction finding, achieving positioning accuracies of up to 1 km. They integrate multiple missions, including radar monitoring, communications, measurement and control, and navigation, and also offer optical imaging and synthetic aperture imaging capabilities. The satellite-based radio monitoring systems of France's Swarm, Hawkeye 360, Kleos Space, and Unseenlabs are characterized by miniaturization, about 500km from the ground, with a payload mass of 6-50kg. They have relatively simple functions and mainly complete electromagnetic spectrum situational awareness of ground radio signals and signal source positioning. They mainly use the three-star time-frequency difference for positioning, with a positioning accuracy of less than 3km and limited frequency coverage.

[0003] However, the current mature satellite-based radio monitoring systems mainly target terrestrial radio signals, mainly covering maritime radio systems and land radio systems, with limited frequency coverage. They do not consider the monitoring of signals from satellite radio systems such as satellite communication systems and satellite navigation systems, as well as other new frequency band signals, and cannot cover Ka-band and Ku-band satellite communication signals.

[0004] Furthermore, with the development of low-orbit satellite constellations, some studies have proposed using them to monitor the signals of satellite radio systems. For example, Chinese patent publication CN110794425A, entitled "A Navigation Augmentation System Based on Low-orbit Constellation Monitoring GNSS Signals and Broadcasting GNSS Frequency Band Navigation Augmentation Signals," discloses a navigation augmentation system that utilizes a low-orbit satellite constellation to receive GNSS signals, obtain positioning results, analyze correction parameters such as the GNSS signal's orbit, clock error, code deviation, and carrier phase deviation, and broadcast information to complete the navigation augmentation task. However, this system only analyzes and compiles statistics on the signal reception performance and tracking parameters of satellite navigation signals, and does not consider the linkage between the low-orbit satellite constellation and the ground, or radio monitoring of other satellite systems, resulting in poor monitoring efficiency. Summary of the Invention

[0005] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a satellite-ground linkage radio monitoring system and method based on low-orbit satellites.

[0006] The technical solutions of the present invention are as follows:

[0007] In a first aspect, a satellite-ground linkage radio monitoring system based on a low-orbit satellite is provided, comprising:

[0008] a radio monitoring payload, deployed on a low-orbit satellite, configured to perform beam tracking of a radio system of a satellite to be monitored according to a received radio monitoring mission, monitor and collect signals in the L-band, Ka-band, Ku-band, X-band, C-band, and S-band, perform coarse signal processing on the signals to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, transmit the signal data to the low-orbit satellite so that the low-orbit satellite adjusts its position and the pointing direction of the radio monitoring payload beam, and perform spatiotemporal tagging on the signal data before transmitting it to the low-orbit satellite so that the low-orbit satellite transmits the signal data to a ground station;

[0009] A radio monitoring data processing module is deployed on the ground station and is used to generate a radio monitoring task based on the operating orbit and beam coverage of the satellite radio system to be monitored and send it to the ground station so that the ground station can inject the radio monitoring task into the low-orbit satellite, perform precision processing on the received signal data, and associate the signal data with time and space information to obtain the operating orbit, beam coverage and radio electromagnetic situation of the satellite radio system to be monitored, and update the radio monitoring task based on the obtained operating orbit and beam coverage of the satellite radio system to be monitored.

[0010] In some optional embodiments, the radio monitoring payload includes:

[0011] L-band receiving phased array, used to monitor and collect L-band signals;

[0012] Ka / Ku-band receiving phased array, used to monitor and acquire Ka-band and Ku-band signals;

[0013] XCS band antenna, used to monitor and collect X-band, C-band and S-band signals;

[0014] The signal comprehensive processing module is respectively connected to the L-band receiving phased array, the Ka / Ku-band receiving phased array, the XCS-band antenna, the satellite service computer on the low-orbit satellite, and the communication payload on the low-orbit satellite, and is used to perform beam tracking of the radio system of the satellite to be monitored according to the received radio monitoring task, perform coarse processing on the collected signals to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, send the signal data to the low-orbit satellite so that the low-orbit satellite adjusts its own position, adjusts the beam pointing of the L-band receiving phased array, adjusts the beam pointing of the Ka / Ku-band receiving phased array, and adjusts the beam pointing of the XCS-band antenna, and performs time and space marking on the signal data before sending it to the low-orbit satellite so that the low-orbit satellite sends the signal data to the ground station.

[0015] In some optional embodiments, the radio monitoring data processing module is deployed on the cloud platform of the ground station, and the radio monitoring data processing module includes:

[0016] a mission planning unit, configured to generate a radio monitoring mission based on the operating orbit and beam coverage of the satellite radio system to be monitored and send the mission to the ground station so that the ground station can upload the radio monitoring mission to the low-orbit satellite;

[0017] The radio monitoring processing unit is connected to the mission planning unit and is used to perform fine processing on the received signal data and associate the signal data with time and space information to obtain the operating orbit, beam coverage and radio electromagnetic situation of the satellite radio system to be monitored, and send the obtained operating orbit and beam coverage of the satellite radio system to be monitored to the mission planning unit so that the mission planning unit updates the radio monitoring mission.

[0018] In a second aspect, a method for satellite-ground linkage radio monitoring based on a low-orbit satellite is also provided. The method applies the above-mentioned satellite-ground linkage radio monitoring system based on a low-orbit satellite, including:

[0019] Determine the operating orbit and beam coverage of the satellite radio system to be monitored, determine the theoretical operating orbit of the low-orbit satellite when performing the radio monitoring mission based on the operating orbit and beam coverage of the satellite radio system to be monitored, generate a radio monitoring mission including the theoretical operating orbit information, the operating orbit and beam coverage of the satellite radio system to be monitored, and annotate it to the low-orbit satellite used to perform the radio monitoring mission;

[0020] controlling a low-orbit satellite receiving a radio monitoring mission to operate to a theoretical operating orbit, utilizing a radio monitoring payload to monitor and collect signals in real time, coarsely processing the signals after collecting them to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, performing feedback adjustment on the low-orbit satellite position and the radio monitoring payload beam pointing according to the obtained signal strength until the obtained signal strength reaches a maximum, and after completing the feedback adjustment on the low-orbit satellite position and the radio monitoring payload beam pointing, coarsely processing the collected signals to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, and performing time-space tagging on the obtained signal data before transmitting it to the low-orbit satellite so that the low-orbit satellite transmits the signal data to the ground station;

[0021] The radio monitoring data processing module is used to precisely process the received signal data and correlate the signal data with time and space information to obtain the orbit, beam coverage and radio electromagnetic situation of the satellite radio system to be monitored;

[0022] The theoretical operating orbit of the low-orbit satellite when performing the radio monitoring mission is determined based on the obtained operating orbit and beam coverage of the radio system of the satellite to be monitored. The low-orbit satellite used to perform the radio monitoring mission is determined based on the determined theoretical operating orbit and the actual operating orbits and fuel reserves of all low-orbit satellites deployed with radio monitoring payloads at the current moment. A radio monitoring mission including the theoretical operating orbit information, the operating orbit and beam coverage of the radio system of the satellite to be monitored is generated and assigned to the low-orbit satellite determined to perform the radio monitoring mission.

[0023] In some optional embodiments, the method further comprises:

[0024] The performance curve of the radio signal is drawn based on the precise processing results of the signal data, and the service performance of the satellite radio system to be monitored is checked to see if there are any problems.

[0025] The main advantages of the technical solution of the present invention are as follows:

[0026] The low-orbit satellite-based satellite-to-ground linkage radio monitoring system and method of the present invention deploys a radio monitoring payload on the low-orbit satellite and a radio monitoring data processing module on the ground station, uses the radio monitoring payload to monitor satellite radio system signals and other frequency band signals, and simultaneously transmits the signal data to the ground station, completes signal data processing at the ground station, and feeds back information to the low-orbit satellite based on the signal data processing results to adjust the operating status of the low-orbit satellite. It can fully integrate on-board processing capabilities and ground processing capabilities to realize satellite-to-ground linkage radio monitoring, significantly improve the flexibility and efficiency of radio monitoring, and can realize the monitoring of multiple frequency band signals including satellite radio system signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 A structural block diagram of a low-orbit satellite-based ground-to-space radio monitoring system provided by an embodiment of the present invention;

[0029] Figure 2 A flowchart of a satellite-ground linked radio monitoring method based on a low-orbit satellite is provided in an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1- Radio monitoring payload, 11- L-band receiving phased array, 12- Ka / Ku-band receiving phased array, 13- XCS band antenna, 14- Signal integrated processing module;

[0032] 2-Radio monitoring data processing module, 21-Mission planning unit, 22-Radio monitoring processing unit. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] refer to Figure 1In a first aspect, an embodiment of the present invention provides a satellite-ground linkage radio monitoring system based on a low-orbit satellite, the system comprising:

[0036] a radio monitoring payload 1, deployed on a low-orbit satellite, configured to perform beam tracking of the radio system of the satellite to be monitored based on the received radio monitoring mission, monitor and collect signals in the L-band, Ka-band, Ku-band, X-band, C-band, and S-band, perform coarse signal processing on the signals to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, transmit the signal data to the low-orbit satellite so that the low-orbit satellite can adjust its own position and the beam pointing of the radio monitoring payload 1, and perform spatiotemporal tagging on the signal data before transmitting it to the low-orbit satellite so that the low-orbit satellite can transmit the signal data to the ground station;

[0037] The radio monitoring data processing module 2 is deployed on the ground station and is used to generate a radio monitoring task based on the operating orbit and beam coverage of the satellite radio system to be monitored and send it to the ground station so that the ground station can inject the radio monitoring task into the low-orbit satellite, perform precise processing on the received signal data, and associate the signal data with the time and space information to obtain the operating orbit, beam coverage and radio electromagnetic situation of the satellite radio system to be monitored, and update the radio monitoring task based on the obtained operating orbit and beam coverage of the satellite radio system to be monitored.

[0038] It should be noted that the L-band represents the radio band with a frequency of 1 to 2 GHz, the S-band represents the radio band with a frequency of 2 to 4 GHz, the C-band represents the radio band with a frequency of 4 to 8 GHz, the X-band represents the radio band with a frequency of 8 to 12 GHz, the Ku-band represents the radio band with a frequency of 12 to 18 GHz, and the Ka-band represents the radio band with a frequency of 27 to 40 GHz.

[0039] The low-orbit satellite-based ground-linked radio monitoring system provided by an embodiment of the present invention deploys a radio monitoring payload 1 on the low-orbit satellite and a radio monitoring data processing module 2 on the ground station. The radio monitoring payload 1 is used to monitor satellite radio system signals and other frequency band signals, and the signal data is simultaneously transmitted to the ground station. The signal data processing is completed at the ground station, and information is fed back to the low-orbit satellite based on the signal data processing results to adjust the operating status of the low-orbit satellite. The system can fully integrate on-board processing capabilities and ground processing capabilities to realize ground-linked radio monitoring, significantly improve the flexibility and efficiency of radio monitoring, and can realize the monitoring of multiple frequency band signals including satellite radio system signals.

[0040] Furthermore, in an embodiment of the present invention, the low-orbit satellite-based satellite-ground linkage radio monitoring system can operate in the following manner:

[0041] The operating orbit and beam coverage of the radio system of the satellite to be monitored are determined in advance and sent to the radio monitoring data processing module 2. The radio monitoring data processing module 2 determines the theoretical operating orbit of the low-orbit satellite when performing the radio monitoring task based on the operating orbit and beam coverage of the radio system of the satellite to be monitored, generates a radio monitoring task including theoretical operating orbit information, the operating orbit and beam coverage of the radio system of the satellite to be monitored, and sends it to the ground station, so that the ground station can inject the radio monitoring task into the low-orbit satellite used to perform the radio monitoring task; after receiving the radio monitoring task, the low-orbit satellite moves to the theoretical operating orbit and sends the radio monitoring task to the radio monitoring payload 1 deployed thereon, and the radio monitoring payload 1 performs beam tracking of the radio system of the satellite to be monitored based on the received radio monitoring task, monitors and collects signals of the L-band, Ka-band, Ku-band, X-band, C-band, and S-band, performs coarse processing on the signals to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, and sends the signal data to the low-orbit satellite so that the low-orbit satellite can adjust its own position and the beam pointing of the radio monitoring payload 1, and processes the signal data. After the signal data is time-space marked, it is sent to the low-orbit satellite so that the low-orbit satellite sends the signal data to the ground station. After receiving the signal data, the ground station sends the signal data to the radio monitoring data processing module 2. The radio monitoring data processing module 2 performs precise processing on the received signal data and associates the signal data with the time-space information to obtain the operating orbit, beam coverage, and radio electromagnetic situation of the radio system of the satellite to be monitored. After obtaining the operating orbit and beam coverage of the radio system of the satellite to be monitored, the radio monitoring data processing module 2 determines the theoretical operating orbit of the low-orbit satellite when performing the radio monitoring mission based on the latest operating orbit and beam coverage of the radio system of the satellite to be monitored, generates a radio monitoring mission including the theoretical operating orbit information, the operating orbit and beam coverage of the radio system of the satellite to be monitored, and sends it to the ground station so that the ground station injects the updated radio monitoring mission into the low-orbit satellite used to perform the radio monitoring mission, so that the low-orbit satellite and the radio monitoring payload 1 deployed thereon perform subsequent actions according to the updated radio monitoring mission. The above-mentioned satellite-ground linkage closed-loop feedback monitoring process is repeated until the monitoring is completed.

[0042] In the embodiment of the present invention, the specific processing methods of the coarse signal processing and the fine signal processing are set according to actual needs. For example, the coarse signal processing includes Fourier transform and high-order statistics.

[0043] refer to Figure 1 Furthermore, in an optional implementation of the embodiment of the present invention, the radio monitoring payload 1 includes:

[0044] An L-band receiving phased array 11 is used to monitor and collect L-band signals;

[0045] A Ka / Ku band receiving phased array 12 is used to monitor and collect Ka-band and Ku-band signals;

[0046] XCS band antenna 13, used for monitoring and collecting X-band, C-band and S-band signals;

[0047] The signal comprehensive processing module 14 is respectively connected to the L-band receiving phased array 11, the Ka / Ku-band receiving phased array 12, the XCS-band antenna 13, the satellite service computer on the low-orbit satellite, and the communication payload on the low-orbit satellite. It is used to perform beam tracking of the radio system of the satellite to be monitored according to the received radio monitoring task, perform coarse processing on the collected signals to obtain signal data including signal strength, signal frequency, bandwidth and modulation mode, send the signal data to the low-orbit satellite so that the low-orbit satellite can adjust its own position, adjust the beam pointing of the L-band receiving phased array 11, adjust the beam pointing of the Ka / Ku-band receiving phased array 12 and adjust the beam pointing of the XCS-band antenna 13, and perform time and space marking on the signal data before sending it to the low-orbit satellite so that the low-orbit satellite can send the signal data to the ground station.

[0048] In an embodiment of the present invention, to achieve the aforementioned functions of the signal integration processing module 14, improve the integration level of the radio monitoring payload 1, and reduce the area, power consumption, and cost of the radio monitoring payload 1, the signal integration processing module 14 adopts an integrated "FPGA + ARM" structure. Based on the functions required by the signal integration processing module 14, the corresponding processing program is pre-loaded into the FPGA chip and ARM processor in the signal integration processing module 14. When the functions of the signal integration processing module 14 need to be adjusted, a corresponding program is designed on the ground end based on the required functions, and the program data is uploaded to the communication payload of the low-orbit satellite, so that the communication payload can send the uploaded data to the signal integration processing module 14 for online program reconstruction of the signal integration processing module 14.

[0049] refer to Figure 1 Furthermore, in an optional implementation of the embodiment of the present invention, the radio monitoring data processing module 2 is deployed on the cloud platform of the ground station, specifically constructed using the cloud platform of the ground station, and the radio monitoring data processing module 2 includes:

[0050] The mission planning unit 21 is used to generate a radio monitoring mission based on the operating orbit and beam coverage of the satellite radio system to be monitored and send it to the ground station so that the ground station can inject the radio monitoring mission into the low-orbit satellite;

[0051] The radio monitoring processing unit 22 is connected to the task planning unit 21, and is used to perform precise processing on the received signal data and to associate the signal data with the time and space information to obtain the operating orbit, beam coverage and radio electromagnetic situation of the satellite radio system to be monitored, and to send the obtained operating orbit and beam coverage of the satellite radio system to be monitored to the task planning unit 21 so that the task planning unit 21 updates the radio monitoring task.

[0052] By setting up the task planning unit 21 and the radio monitoring processing unit 22 to respectively carry out the planning of the radio monitoring task and the processing of the radio monitoring data, interference of different data can be avoided, the efficiency of task planning and data processing can be improved, and the efficiency of radio monitoring can be further improved.

[0053] refer to Figure 2 In a second aspect, an embodiment of the present invention further provides a low-orbit satellite-based satellite-to-ground radio monitoring method, which uses the above-mentioned low-orbit satellite-based satellite-to-ground radio monitoring system. The method includes the following steps:

[0054] Step 1: Determine the operating orbit and beam coverage of the satellite radio system to be monitored, determine the theoretical operating orbit of the low-orbit satellite when performing the radio monitoring mission based on the operating orbit and beam coverage of the satellite radio system to be monitored, generate a radio monitoring mission including the theoretical operating orbit information, the operating orbit and beam coverage of the satellite radio system to be monitored, and attach it to the low-orbit satellite used to perform the radio monitoring mission;

[0055] Step 2: Control the low-orbit satellite receiving the radio monitoring mission to operate to the theoretical operating orbit, use the radio monitoring payload 1 to monitor and collect signals in real time, and after collecting the signals, perform coarse processing on the signals to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode. Feedback adjustment is performed on the low-orbit satellite position and the beam pointing of the radio monitoring payload 1 according to the obtained signal strength until the obtained signal strength reaches a maximum. After completing the feedback adjustment of the low-orbit satellite position and the beam pointing of the radio monitoring payload 1, the collected signals are coarsely processed to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode. The obtained signal data is time-space marked and sent to the low-orbit satellite so that the low-orbit satellite can send the signal data to the ground station.

[0056] Step 3: Use the radio monitoring data processing module 2 to perform precise processing on the received signal data and associate the signal data with the spatiotemporal information to obtain the orbit, beam coverage, and radio electromagnetic situation of the satellite radio system to be monitored;

[0057] Step 4: Determine the theoretical operating orbit of the low-orbit satellite when performing the radio monitoring mission based on the obtained operating orbit and beam coverage of the radio system of the satellite to be monitored. Determine the low-orbit satellite used to perform the radio monitoring mission based on the determined theoretical operating orbit and the actual operating orbits and fuel reserves of all low-orbit satellites deployed with radio monitoring payload 1 at the current moment. Generate a radio monitoring mission including the theoretical operating orbit information, the operating orbit and beam coverage of the radio system of the satellite to be monitored, and attach it to the low-orbit satellite determined to perform the radio monitoring mission.

[0058] It should be noted that step 1 is implemented on the ground station, step 2 is implemented on the low-orbit satellite, and steps 3 and 4 are also implemented on the ground station. After executing step 4, the low-orbit satellite, upon receiving the radio monitoring mission, performs corresponding actions according to the radio monitoring mission, specifically executing step 2, and then continuing to execute steps 3 and 4, and continuously repeating this process until the monitoring is completed.

[0059] In an embodiment of the present invention, by adopting the above-mentioned method for radio monitoring, it is possible to fully integrate on-board processing capabilities and ground processing capabilities, realize satellite-ground linked radio monitoring, significantly improve the flexibility and efficiency of radio monitoring, and realize the monitoring of multiple frequency band signals including satellite radio system signals; and, by performing orbit planning and maneuvering of low-orbit satellites based on the actual operating orbit and beam coverage of the satellite radio system to be monitored, it is possible to reduce the energy consumption of low-orbit satellites, and make the low-orbit satellites as close as possible to the downlink beam range of the satellite radio system to be monitored, thereby extending the effective monitoring time of the low-orbit satellites and improving the amount of monitoring signal data and monitoring accuracy.

[0060] Furthermore, in an embodiment of the present invention, the method further includes:

[0061] The performance curve of the radio signal is drawn based on the precise processing results of the signal data, and the service performance of the satellite radio system to be monitored is checked to see if there are any problems.

[0062] The performance curve of the radio signal is drawn through the signal data processing results, and the service performance of the satellite radio system to be monitored is checked based on the signal data processing results and the performance curve. When problems occur in the satellite radio system, they can be discovered in time to ensure the service stability and reliability of the satellite radio system.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this document are all referenced to the placement states shown in the accompanying drawings.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A satellite-ground linkage radio monitoring system based on low-orbit satellites, characterized in that: The system comprises: a radio monitoring payload, deployed on a low-orbit satellite, configured to perform beam tracking of a radio system of a satellite to be monitored according to a received radio monitoring mission, monitor and collect signals in the L-band, Ka-band, Ku-band, X-band, C-band, and S-band, perform coarse signal processing on the signals to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, transmit the signal data to the low-orbit satellite so that the low-orbit satellite adjusts its position and the pointing direction of the radio monitoring payload beam, and perform spatiotemporal tagging on the signal data before transmitting it to the low-orbit satellite so that the low-orbit satellite transmits the signal data to a ground station; a radio monitoring data processing module, deployed on the ground station, for generating a radio monitoring task based on the operating orbit and beam coverage of the satellite radio system to be monitored and transmitting the task to the ground station so that the ground station can inject the radio monitoring task into the low-orbit satellite; performing precision processing on received signal data, and correlating the signal data with spatiotemporal information to obtain the operating orbit, beam coverage, and radio electromagnetic situation of the satellite radio system to be monitored; and updating the radio monitoring task based on the obtained operating orbit and beam coverage of the satellite radio system to be monitored; Updating the radio monitoring task according to the obtained operating orbit and beam coverage of the radio system of the satellite to be monitored includes: determining a theoretical operating orbit of a low-orbit satellite when performing the radio monitoring task according to the obtained operating orbit and beam coverage of the radio system of the satellite to be monitored, determining a low-orbit satellite used to perform the radio monitoring task according to the determined theoretical operating orbit and the actual operating orbits and fuel inventories of all low-orbit satellites deployed with radio monitoring payloads at a current moment, generating a radio monitoring task including the theoretical operating orbit information, the operating orbit and beam coverage of the radio system of the satellite to be monitored, and annotating the task to the determined low-orbit satellite used to perform the radio monitoring task; The radio monitoring payload includes: L-band receiving phased array, used to monitor and collect L-band signals; Ka / Ku-band receiving phased array, used to monitor and acquire Ka-band and Ku-band signals; XCS band antenna, used to monitor and collect X-band, C-band and S-band signals; The signal comprehensive processing module is respectively connected to the L-band receiving phased array, the Ka / Ku-band receiving phased array, the XCS-band antenna, the satellite service computer on the low-orbit satellite, and the communication payload on the low-orbit satellite, and is used to perform beam tracking of the radio system of the satellite to be monitored according to the received radio monitoring task, perform coarse processing on the collected signals to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, send the signal data to the low-orbit satellite so that the low-orbit satellite adjusts its own position, adjusts the beam pointing of the L-band receiving phased array, adjusts the beam pointing of the Ka / Ku-band receiving phased array, and adjusts the beam pointing of the XCS-band antenna, and performs time and space marking on the signal data before sending it to the low-orbit satellite so that the low-orbit satellite sends the signal data to the ground station.

2. The low-orbit satellite-based satellite-to-ground linkage radio monitoring system according to claim 1, characterized in that: The radio monitoring data processing module is deployed on the cloud platform of the ground station, and the radio monitoring data processing module includes: a mission planning unit, configured to generate a radio monitoring mission based on the operating orbit and beam coverage of the satellite radio system to be monitored and send the mission to the ground station so that the ground station can upload the radio monitoring mission to the low-orbit satellite; The radio monitoring processing unit is connected to the mission planning unit and is used to perform fine processing on the received signal data and associate the signal data with time and space information to obtain the operating orbit, beam coverage and radio electromagnetic situation of the satellite radio system to be monitored, and send the obtained operating orbit and beam coverage of the satellite radio system to be monitored to the mission planning unit so that the mission planning unit updates the radio monitoring mission.

3. A satellite-ground linkage radio monitoring method based on low-orbit satellites, characterized in that: The method applies the low-orbit satellite-based ground-to-space radio monitoring system according to any one of claims 1 to 2, and the method comprises: Determine the operating orbit and beam coverage of the satellite radio system to be monitored, determine the theoretical operating orbit of the low-orbit satellite when performing the radio monitoring mission based on the operating orbit and beam coverage of the satellite radio system to be monitored, generate a radio monitoring mission including the theoretical operating orbit information, the operating orbit and beam coverage of the satellite radio system to be monitored, and annotate it to the low-orbit satellite used to perform the radio monitoring mission; controlling a low-orbit satellite receiving a radio monitoring mission to operate to a theoretical operating orbit, utilizing a radio monitoring payload to monitor and collect signals in real time, coarsely processing the signals after collecting them to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, performing feedback adjustment on the low-orbit satellite position and the radio monitoring payload beam pointing according to the obtained signal strength until the obtained signal strength reaches a maximum, and after completing the feedback adjustment on the low-orbit satellite position and the radio monitoring payload beam pointing, coarsely processing the collected signals to obtain signal data including signal strength, signal frequency, bandwidth, and modulation mode, and performing time-space tagging on the obtained signal data before transmitting it to the low-orbit satellite so that the low-orbit satellite transmits the signal data to the ground station; The radio monitoring data processing module is used to precisely process the received signal data and correlate the signal data with time and space information to obtain the orbit, beam coverage and radio electromagnetic situation of the satellite radio system to be monitored; The theoretical operating orbit of the low-orbit satellite when performing the radio monitoring mission is determined based on the obtained operating orbit and beam coverage of the radio system of the satellite to be monitored. The low-orbit satellite used to perform the radio monitoring mission is determined based on the determined theoretical operating orbit and the actual operating orbits and fuel reserves of all low-orbit satellites deployed with radio monitoring payloads at the current moment. A radio monitoring mission is generated that includes the theoretical operating orbit information, the operating orbit and beam coverage of the radio system of the satellite to be monitored, and is assigned to the low-orbit satellite determined to perform the radio monitoring mission.

4. The method for satellite-ground linked radio monitoring based on low-orbit satellites according to claim 3, characterized in that: The method further comprises: The performance curve of the radio signal is drawn based on the precise processing results of the signal data, and the service performance of the satellite radio system to be monitored is checked to see if there are any problems.

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