CN117761622A - Satellite tracking system - Google Patents
Satellite tracking system Download PDFInfo
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- CN117761622A CN117761622A CN202311819194.3A CN202311819194A CN117761622A CN 117761622 A CN117761622 A CN 117761622A CN 202311819194 A CN202311819194 A CN 202311819194A CN 117761622 A CN117761622 A CN 117761622A
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Abstract
The present application relates to a satellite tracking system comprising: the antenna array is used for receiving multipath incoming wave signals sent by the tracking satellite; the transmission module is connected with the antenna array and used for transmitting the multipath incoming wave signals to the radio platform; the radio platform determines the transmitting angles of the multipath incoming wave signals according to the phase differences among the multipath incoming wave signals and the antenna arrangement distances in the antenna array; and determining the position information of the tracking satellite according to the emission angles of the multipath incoming wave signals. The method and the device can reduce the complexity of the tracking system.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a satellite tracking system.
Background
With the rapid development of satellite communication technology and application, the low-orbit satellite internet is increasingly used. Low orbit satellite systems are in the visible arc of a satellite, with the ground station mechanical antenna pointing to move with the satellite. In particular, for a large number of satellites deployed in a constellation, each satellite has the same technical parameters, and the ground station uses the same plurality of antennas for communication service, and the antennas form a resource pool to jointly serve the satellites in the constellation. Typically, an antenna field has a plurality of antennas to form an antenna array, and the low-orbit satellite system operation control center performs task planning, allocation, scheduling, and collecting antenna operation states on the antenna array.
In the conventional technology, an antenna array in a satellite tracking system adopts a differential beam angle measurement principle.
However, the sum and difference beam contrast angle requires the use of two beams, which increases the complexity and cost of the overall system, and improvements are needed.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a satellite tracking system that reduces the complexity of the tracking system.
The present application provides a satellite tracking system, comprising:
the antenna array is used for receiving multipath incoming wave signals sent by the tracking satellite;
the transmission module is connected with the antenna array and used for determining the transmitting angles of the multipath incoming wave signals according to the phase differences among the multipath incoming wave signals and the antenna arrangement distances in the antenna array;
and determining the position information of the tracking satellite according to the emission angles of the multipath incoming wave signals.
In one embodiment, a transmission module includes:
the switch submodule is used for controlling on-off of the antenna array and a transmission line of the radio platform;
and the frequency conversion sub-module is used for carrying out frequency conversion processing on the multipath incoming wave signals according to the target frequency of the radio platform.
In one embodiment, the multipath incoming wave signals include a first incoming wave signal and a second incoming wave signal, the first incoming wave signal is received by a first antenna element in the antenna array, the second incoming wave signal is received by a second antenna element in the antenna array, and the first antenna element and the second antenna element are adjacent; the radio platform determines the transmitting angle of the multipath incoming wave signals according to the phase differences among the multipath incoming wave signals and the antenna arrangement distance in the antenna array, and is particularly used for:
and determining the transmitting angle of the first incoming wave signal according to the phase difference between the first incoming wave signal and the second incoming wave signal, the frequency of the first incoming wave signal and the arrangement distance between the first antenna and the second antenna.
In one embodiment, the frequency conversion submodule is specifically configured to:
the signal frequencies of the multipath incoming wave signals are all adjusted to the target frequency of the radio platform, and the phase difference between the multipath incoming wave signals is kept unchanged.
In one embodiment, the position information of the tracking satellite includes a pitch angle value of the tracking satellite.
In one embodiment, the switch sub-module comprises a mechanical switch.
In one embodiment, each antenna element in the antenna array comprises both left-hand and right-hand circular polarizations.
In one embodiment, an error compensation signal corresponding to an error condition is obtained; wherein, the error condition is determined according to the error signal intensity and the error signal environment;
if the signal intensity of the incoming wave signal reaches the error signal intensity or the current environment is successfully matched with the error signal environment, determining the transmitting angles of the multipath incoming wave signals according to the error compensation signals, the phase differences among the multipath incoming wave signals and the antenna arrangement distances in the antenna array.
According to the satellite tracking system, the radio platform only needs to determine the angle value of the tracked satellite by adopting the preset angle measurement algorithm according to the emission angles corresponding to the multipath incoming wave signals, and compared with the traditional technology that only one wave beam is needed for measuring the angle of the differential wave beam, the complexity and the cost of the whole system are reduced.
Drawings
FIG. 1 is a schematic diagram of a satellite tracking system in one embodiment;
FIG. 2 is a schematic diagram of a satellite tracking system according to another embodiment;
fig. 3 is a schematic diagram of a first antenna element and a second antenna element in one embodiment;
FIG. 4 is a flow chart of an incoming signal according to one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
As shown in fig. 1, the present application provides a satellite tracking system, comprising: an antenna array, a transmission module and a radio platform; wherein,
and the antenna array is used for receiving multipath incoming wave signals sent by the tracking satellite.
The transmission module is connected with the antenna array and used for determining the transmitting angles of the multipath incoming wave signals according to the phase differences among the multipath incoming wave signals and the antenna arrangement distances in the antenna array;
and determining the position information of the tracking satellite according to the emission angles of the multipath incoming wave signals.
It will be appreciated that the antenna array comprises a plurality of antenna elements; optionally, the satellite tracking system in this embodiment may include four antenna units, configured to receive incoming wave signals reflected by the tracking satellite; the tracked satellite is the tracked satellite. Further, each antenna unit includes two polarization modes of left-hand circular polarization and right-hand circular polarization, only two antenna units, vertical or horizontal, receive satellite signals at a time, and when the satellite deviates from the antenna unit by an angle, the two antenna units can respectively receive signals including pitch angle information or horizontal angle information.
Alternatively, the transmission module may comprise a plurality of transmission lines for transmitting signals between the antenna array and the radio platform.
Alternatively, after the radio platform is processed by the software radio platform of the AD9361, the comparison of the phases of the two channels of received signals is completed in the FPGA, so as to implement the process of transferring the analog signals to the digital domain. And the data communication adopts RS485 to complete the interaction between the single board and external data.
According to the satellite tracking system, the radio platform only needs to determine the angle value of the tracked satellite by adopting the preset angle measurement algorithm according to the emission angles corresponding to the multipath incoming wave signals, and compared with the traditional technology that only one wave beam is needed for measuring the angle of the differential wave beam, the complexity and the cost of the whole system are reduced.
In one embodiment, as shown in fig. 2, the transmission module includes: the switching sub-module is used for controlling the on-off of the antenna array and the transmission line of the radio platform; and the frequency conversion sub-module is used for carrying out frequency conversion processing on the multipath incoming wave signals according to the target frequency of the radio platform.
Wherein the switch sub-module comprises a mechanical switch.
Correspondingly, as shown in fig. 3 and fig. 4, the multipath incoming wave signals include a first incoming wave signal and a second incoming wave signal, the first incoming wave signal is received by a first antenna unit in the antenna array, the second incoming wave signal is received by a second antenna unit in the antenna array, and the first antenna unit and the second antenna unit are adjacent; the radio platform determines the transmitting angle of the multipath incoming wave signals according to the phase differences among the multipath incoming wave signals and the antenna arrangement distance in the antenna array, and is particularly used for:
and determining the transmitting angle of the first incoming wave signal according to the phase difference between the first incoming wave signal and the second incoming wave signal, the frequency of the first incoming wave signal and the arrangement distance between the first antenna and the second antenna.
It can be understood that the emission angles corresponding to the multipath incoming wave signals are all set to be theta, and the unknown quantity theta;
the antenna arrangement distance between the first antenna unit and the second antenna unit is d, and the delay distance l=dsinθ; the phase difference between the first incoming wave signal and the second incoming wave signal is delta phi; the sum of θ and Δφ is 90, and L represents the distance of the wave propagation variable.
It can be understood that based on fig. 3 and 4, the following formulas (1) - (6) are obtained to obtain the phase difference between the first incoming wave signal and the second incoming wave signal; wherein:
where λ is the wavelength of the incoming signal, which is determined according to the frequency of the incoming signal.
Optionally, the frequency conversion submodule is specifically configured to: the signal frequencies of the multipath incoming wave signals are all adjusted to the target frequency of the radio platform, and the phase difference between the multipath incoming wave signals is kept unchanged.
In one embodiment, the position information of the tracking satellite includes a pitch angle value of the tracking satellite.
The radio platform is used for determining the transmitting angles of the multipath incoming wave signals according to the phase differences among the multipath incoming wave signals and the antenna arrangement distances in the antenna array, and is particularly used for:
obtaining an error compensation signal corresponding to the error condition; if the signal intensity of the incoming wave signal reaches the error signal intensity or the current environment is successfully matched with the error signal environment, determining the transmitting angles of the multipath incoming wave signals according to the error compensation signals, the phase differences among the multipath incoming wave signals and the antenna arrangement distances in the antenna array.
Wherein the error condition is determined based on the error signal strength (meaning that the strength of the signal is less than a threshold value) and the error signal environment (which causes interference to signal propagation to a corresponding threshold value).
It will be appreciated that the signal strength of the signal may vary under different environmental information (e.g. cloud, temperature) and that in the case of errors there may be errors in the transmission angle determined from the incoming signal.
In the experimental environment of the satellite tracking system in this embodiment, a positioning module may be disposed on the tracking satellite, where the positioning module may send real-time positioning information to the satellite tracking system in this embodiment, and acquire satellite position information determined by the satellite tracking system according to the historical incoming wave signal under error conditions;
and determining an error compensation signal according to the difference between the real-time positioning information and the satellite position information determined according to the historical incoming wave signal.
In the use process of the satellite tracking system, if the signal intensity of the incoming wave signal reaches the error signal intensity or the current environment is successfully matched with the error signal environment, the emission angles of the multipath incoming wave signals are compensated according to the error compensation signal.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (8)
1. A satellite tracking system, the satellite tracking system comprising:
the antenna array is used for receiving multipath incoming wave signals sent by the tracking satellite;
the transmission module is connected with the antenna array and used for transmitting multipath incoming wave signals to the radio platform;
the radio platform is used for determining the transmitting angles of the multipath incoming wave signals according to the phase differences among the multipath incoming wave signals and the antenna arrangement distances in the antenna array;
and determining the position information of the tracking satellite according to the emission angles of the multipath incoming wave signals.
2. The satellite tracking system of claim 1, wherein the transmission module comprises:
the switch submodule is used for controlling on-off of the antenna array and a transmission line of the radio platform;
and the frequency conversion sub-module is used for carrying out frequency conversion processing on the multipath incoming wave signals according to the target frequency of the radio platform.
3. The satellite tracking system of claim 2, wherein the plurality of incoming signals includes a first incoming signal and a second incoming signal, and the first incoming signal is received by a first antenna element in the antenna array, and the second incoming signal is received by a second antenna element in the antenna array, and the first antenna element and the second antenna element are adjacent; the radio platform determines the transmitting angles of the multipath incoming wave signals according to the phase differences among the multipath incoming wave signals and the antenna arrangement distances in the antenna array, and is particularly used for:
and determining the emission angles of the first incoming wave signal and the second incoming wave signal according to the phase difference between the first incoming wave signal and the second incoming wave signal, the frequency of the first incoming wave signal and the arrangement distance between the first antenna unit and the second antenna unit.
4. The satellite tracking system of claim 1, wherein the frequency conversion sub-module is specifically configured to:
and adjusting the signal frequencies of the multipath incoming wave signals to the target frequency of the radio platform, and keeping the phase difference between the multipath incoming wave signals unchanged.
5. The satellite tracking system of claim 1, wherein the position information of the tracking satellite comprises a pitch angle value of the tracking satellite.
6. The satellite tracking system of claim 2, wherein the switch sub-module comprises a mechanical switch.
7. The satellite tracking system of claim 1, wherein each antenna element in the antenna array comprises both left-hand and right-hand circular polarizations.
8. The method according to claim 1, wherein the radio platform is configured to determine the transmission angle of the multiple incoming signals according to the phase differences between the multiple incoming signals and the antenna arrangement distances in the antenna array, and is specifically configured to:
obtaining an error compensation signal corresponding to the error condition; wherein the error condition is determined according to the error signal strength and the error signal environment;
if the signal intensity of the incoming wave signal reaches the error signal intensity or the current environment is successfully matched with the error signal environment, determining the transmitting angles of the multipath incoming wave signals according to the error compensation signal, the phase differences among the multipath incoming wave signals and the antenna arrangement distances in the antenna array.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311819194.3A CN117761622A (en) | 2023-12-27 | 2023-12-27 | Satellite tracking system |
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| CN202311819194.3A CN117761622A (en) | 2023-12-27 | 2023-12-27 | Satellite tracking system |
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