CN113765578A - Method, device, equipment and storage medium for positioning ground interference source of communication satellite - Google Patents
Method, device, equipment and storage medium for positioning ground interference source of communication satellite Download PDFInfo
- Publication number
- CN113765578A CN113765578A CN202111012735.2A CN202111012735A CN113765578A CN 113765578 A CN113765578 A CN 113765578A CN 202111012735 A CN202111012735 A CN 202111012735A CN 113765578 A CN113765578 A CN 113765578A
- Authority
- CN
- China
- Prior art keywords
- satellite
- adjacent
- main
- communication
- interference source
- 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.)
- Pending
Links
- 238000004891 communication Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000012545 processing Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 8
- 230000006870 function Effects 0.000 description 36
- 238000004364 calculation method Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- IYLGZMTXKJYONK-ACLXAEORSA-N (12s,15r)-15-hydroxy-11,16-dioxo-15,20-dihydrosenecionan-12-yl acetate Chemical compound O1C(=O)[C@](CC)(O)C[C@@H](C)[C@](C)(OC(C)=O)C(=O)OCC2=CCN3[C@H]2[C@H]1CC3 IYLGZMTXKJYONK-ACLXAEORSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- IYLGZMTXKJYONK-UHFFFAOYSA-N ruwenine Natural products O1C(=O)C(CC)(O)CC(C)C(C)(OC(C)=O)C(=O)OCC2=CCN3C2C1CC3 IYLGZMTXKJYONK-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Images
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 discloses a method, a device, equipment and a storage medium for positioning a ground interference source of a communication satellite. The method comprises the steps of obtaining data signals returned by all communication satellites in a visual area to corresponding fixed antennas, wherein each communication satellite is provided with one corresponding fixed antenna, calculating the time difference and the frequency difference between a main satellite signal returned by the main satellite and adjacent satellite signals returned by two adjacent satellites, wherein the main satellite is any one of the communication satellites in the visual area, the main satellite signal is the data signal returned by the main satellite, the adjacent satellite signals are the data signals returned by the adjacent satellites, and determining the position of an interference source of the main satellite based on the time difference and the frequency difference. Each communication satellite is provided with a corresponding fixed antenna, and the position of an interference source of the main satellite is calculated based on the time difference and the frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by the two adjacent satellites, so that the cost is saved, and the positioning precision is improved.
Description
Technical Field
The embodiment of the invention relates to a satellite communication technology, in particular to a method, a device, equipment and a storage medium for positioning a ground interference source of a communication satellite.
Background
With the increasing use of satellite communication and broadcasting, intentional or unintentional interference to a stationary orbit communication satellite, a transponder theft event, and the like are rapidly increasing, and communication satellites of international business satellite companies are interfered to different degrees.
The search and location of the ground interference source is a very complicated technical problem due to the wide coverage of satellite communication. The most effective means at present is a satellite interference source positioning system which appears in the early 90 s of the last century, and the appearance of the system can prevent the phenomena of intentional interference and stealing of communication satellite repeaters to a certain extent.
The existing interference source positioning technology comprises a single-satellite positioning technology, a double-satellite time-frequency difference positioning technology and a three-satellite time difference positioning technology. However, the positioning accuracy of the single-satellite positioning technology and the two-satellite time-frequency difference positioning technology is low, and the positioning accuracy of the three-satellite time-difference positioning technology is accurate, but three receiving antennas need to be arranged for each satellite, but the cost is high.
Disclosure of Invention
The invention provides a method, a device, equipment and a storage medium for positioning a ground interference source of a communication satellite, which are used for improving the positioning precision of the interference source and reducing the cost.
In a first aspect, an embodiment of the present invention provides a method for positioning a ground interference source of a communication satellite, including:
acquiring data signals returned by all communication satellites in a visible area to corresponding fixed antennas, wherein each communication satellite is provided with a corresponding fixed antenna;
calculating time difference and frequency difference between a main satellite signal returned by the main satellite and adjacent satellite signals returned by two adjacent satellites, wherein the main satellite is any one of all communication satellites in a visible area, the main satellite signal is a data signal returned by the main satellite, and the adjacent satellite signals are data signals returned by the adjacent satellites;
determining a location of an interferer to the primary satellite based on the time difference and the frequency difference.
Optionally, calculating a time difference and a frequency difference between a main satellite signal returned by the main satellite and adjacent satellite signals returned by two adjacent satellites includes:
carrying out down-conversion processing on a data signal returned by the target satellite and data signals returned by two adjacent communication satellites;
and performing correlation processing on the main satellite signals and the adjacent satellite signals after the down-conversion processing by adopting an orthogonal fuzzy function to obtain the time difference and the frequency difference of the main satellite signals and the adjacent satellite signals.
Optionally, the performing, by using an orthogonal ambiguity function, correlation processing on the main satellite signal and the adjacent satellite signal after the down-conversion processing to obtain a time difference and a frequency difference between the main satellite signal and the adjacent satellite signal includes:
constructing a first complex envelope function of the main satellite signal with respect to time and a second complex envelope function of the adjacent satellite signal with respect to time;
constructing an orthogonal blur function based on the first complex envelope function and the second complex envelope function;
calculating a maximum value of the orthogonal ambiguity function;
and taking the time difference and the frequency difference of the maximum value of the orthogonal fuzzy function as the time difference and the frequency difference of the main satellite signal and the adjacent satellite signal.
Optionally, after calculating a time difference and a frequency difference between a main satellite signal returned by the main satellite and adjacent satellite signals returned by two adjacent satellites, the method further includes:
acquiring known signals returned by a main satellite and an adjacent satellite;
and carrying out phase calibration on the frequency difference by using the known signal, and filtering local oscillator drift of the communication satellite.
Optionally, determining the position of the interference source of the primary satellite based on the time difference and the frequency difference includes:
establishing a first functional relationship of the distance between the interference source and the communication satellite relative to the time difference and establishing a second functional relationship of the distance change rate between the interference source and the communication satellite relative to the frequency difference;
determining a contour of the time difference based on the first functional relationship and determining a contour of the frequency difference based on the second functional relationship;
and taking the intersection point of the contour line of the time difference and the contour line of the frequency difference on the ground surface as the position of the interference source.
Optionally, before calculating the time difference and the frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by the adjacent two adjacent satellites, the method further includes:
calculating the position precision of the interference source obtained by the combination of the main satellite and each adjacent communication satellite;
and taking the combined communication satellite with the highest position precision as a neighboring satellite of the main satellite.
Optionally, calculating the position accuracy of the interference source obtained by combining the main satellite and each adjacent satellite includes:
calculating the position of an interference source obtained by the combination of the main satellite and each adjacent satellite;
calculating the deviation of the position of each combined interference source from the actual position of the interference source;
and taking the combination with the minimum deviation as two adjacent satellites of the main satellite.
In a second aspect, an embodiment of the present invention further provides a communication satellite ground interference source positioning apparatus, including:
the data signal acquisition module is used for acquiring data signals returned by all communication satellites in a visible area to corresponding fixed antennas, wherein each communication satellite is provided with a corresponding fixed antenna;
the computing module is used for computing the time difference and the frequency difference between a main satellite signal returned by a main satellite and adjacent satellite signals returned by two adjacent satellites, wherein the main satellite is any one of all communication satellites in a visible area, the main satellite signal is a data signal returned by the main satellite, and the adjacent satellite signals are data signals returned by the adjacent satellites;
a location determination module to determine a location of an interferer to the primary satellite based on the time difference and the frequency difference.
In a third aspect, an embodiment of the present invention further provides a computer device, including:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a method for positioning a terrestrial interference source for a communication satellite according to the first aspect of the present invention.
In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the method for positioning a terrestrial interference source of a communication satellite according to the first aspect of the present invention.
The method for positioning the ground interference source of the communication satellite provided by the embodiment of the invention comprises the following steps: the method comprises the steps of obtaining data signals returned by all communication satellites in a visual area to corresponding fixed antennas, wherein each communication satellite is provided with one corresponding fixed antenna, calculating the time difference and the frequency difference between a main satellite signal returned by the main satellite and adjacent satellite signals returned by two adjacent satellites, wherein the main satellite is any one of the communication satellites in the visual area, the main satellite signal is the data signal returned by the main satellite, the adjacent satellite signals are the data signals returned by the adjacent satellites, and determining the position of an interference source of the main satellite based on the time difference and the frequency difference. Each communication satellite is provided with a corresponding fixed antenna, and the position of an interference source of the main satellite is calculated based on the time difference and the frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by the two adjacent satellites, so that the cost is saved, and the positioning precision is improved.
Drawings
Fig. 1 is a flowchart of a method for positioning a terrestrial interference source of a communication satellite according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a positioning apparatus for a ground interference source of a communication satellite according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a computer device according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for positioning a communication satellite terrestrial interference source according to an embodiment of the present invention, where the embodiment is applicable to positioning a communication satellite interference source, and the method can be executed by a positioning apparatus for a communication satellite terrestrial interference source according to an embodiment of the present invention, where the positioning apparatus can be implemented by software and/or hardware, and is generally configured in a computer device, as shown in fig. 1, the method specifically includes the following steps:
s101, data signals returned to corresponding fixed antennas by all communication satellites in the visible area are obtained, wherein each communication satellite is provided with a corresponding fixed antenna.
In particular, all communication satellites in the visible area can be understood as communication satellites that can be "seen" by a local straight line, i.e. there is no object block between the local and communication satellites, and the electromagnetic waves can be directly propagated.
The fixed antenna and the antenna without the servo mechanism cannot be controlled by the antenna controller to rotate, and the orientation is fixed at the beginning of the antenna construction. (antennas with mechanical rotation mechanisms, also classified as fixed antennas, since they are manually rotated only during maintenance)
In the embodiment of the invention, each communication satellite is provided with a corresponding fixed antenna aiming at all communication satellites in the visual area. When the interference source transmits an interference signal to a communication satellite (hereinafter referred to as a main satellite), a side lobe signal is also transmitted to an adjacent communication satellite (hereinafter referred to as an adjacent satellite) near the main satellite. The radiation pattern of the interference source emission pattern, in most cases, the E-plane or H-plane pattern is generally petaloid, so the pattern is also called lobe pattern. The lobe in which the maximum radiation direction lies is called the main lobe, and the remaining lobes are called the side lobes or side lobes. The fixed antenna is used for receiving data signals returned by the corresponding communication satellite.
S102, calculating the time difference and the frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by the two adjacent satellites.
The main satellite is any one of all communication satellites in the visual area, the main satellite signal is a data signal returned by the main satellite, and the adjacent satellite signal is a data signal returned by the adjacent satellite.
In the embodiment of the invention, the time difference and the frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by the adjacent two adjacent satellites are calculated. Since a signal travels through two different paths to the fixed antenna, there is a time Difference between the arrival times at the fixed antennas, which is called tdoa (time Difference of arrival). Since two satellites do not move in space in the same state, although the same signal is transmitted, there is a Frequency Difference, called Frequency Difference of Arrival (Arrival) due to the influence of doppler shift, when arriving at the respective fixed antennas.
Illustratively, in some embodiments of the invention, calculating the time difference and the frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by the adjacent two adjacent satellites comprises:
1. and performing down-conversion processing on the data signals returned by the target satellite and the data signals returned by the two adjacent communication satellites.
In a communication system, in order to easily transmit signals and realize channel multiplexing, the frequency of transmitted signals is high, and thus frequency conversion of signals is an important matter of research of the communication system. Depending on the situation before and after the frequency conversion, down-conversion (frequency reduction) and up-conversion (frequency increase) can be divided. Down conversion is performed in the receiver. The down-conversion is to multiply the received data signal with a local oscillator signal generated by a local oscillator and then obtain a frequency-converted signal through a low-pass filter. The purpose of down-conversion is to reduce the carrier frequency of the signal or to directly remove the carrier frequency to obtain a baseband signal.
2. And performing correlation processing on the main satellite signals and the adjacent satellite signals after the down-conversion processing by adopting an orthogonal fuzzy function to obtain the time difference and the frequency difference of the main satellite signals and the adjacent satellite signals.
Specifically, a first complex envelope function s of the signals of the main satellite with respect to time is constructed1(t) and a second complex envelope function s of the signals of the neighbors with respect to time2(t + τ). Wherein, the time difference between the main satellite signal and the adjacent satellite signal is assumed to be tau.
Constructing an orthogonal fuzzy function based on the first complex envelope function and the second complex envelope function:
where τ is the time difference between the assumed primary satellite signal and the adjacent satellite signal, v is the frequency difference between the assumed primary satellite signal and the adjacent satellite signal, and T is the correlation time length.
The maximum value of the orthogonal blur function is calculated.
Because the two paths of interference signals have correlation and the correlation between the interference signals and noise and other signals is weak, the detection of weak signals can be realized by adopting orthogonal fuzzy function processing. The peak of the orthogonal ambiguity function of the interfering signal will be much larger than the peak of the clutter and noise, as long as the integration time is long enough. Therefore, the orthogonal fuzzy function can be subjected to three-dimensional visualization processing, and the time difference and the frequency difference when the orthogonal fuzzy function value is maximum are actually calculated.
And taking the time difference and the frequency difference at the maximum value of the orthogonal ambiguity function as the time difference and the frequency difference of the main satellite signal and the adjacent satellite signal which are required by us.
The above mentioned time difference and frequency difference are the measured data of the received data signal, and the component of the time difference is relatively simple, i.e. the TDOA we have defined above. The frequency difference includes another component in addition to FDOA due to doppler shift. Since the geostationary orbit satellite is located in outer space beyond 42164km from the earth center, the environment is extremely severe in all aspects. The frequency of the oscillator of the repeater on the satellite can change at any time, which causes the uplink signal of the same frequency, and the drift value of the local oscillator of the repeater exists besides the frequency difference of the downlink signal of the uplink signal and the downlink signal of the uplink signal, which deducts the frequency difference of the repeater. This value is usually between plus or minus a few tens of hertz to tens of kilohertz, while the usual FDOA is only less than 10 hertz, so that drift values of the local oscillator of this transponder are very harmful.
In order to solve this problem, a method called "phase calibration" may be used, i.e. while measuring the unknown signal, another signal is used, which is also retransmitted through the two satellites, and since the retransmission process of the signal and the unknown signal is identical, the drift value of the local oscillator of the repeater can be cancelled by measuring this signal strictly simultaneously.
And S103, determining the position of the interference source of the main satellite based on the time difference and the frequency difference.
The location of the interference source for the primary satellite is determined based on the time difference and the frequency difference. Illustratively, in the embodiment of the invention, the method comprises the following steps:
1. a first functional relationship of the distance of the interference source from the communication satellite with respect to the time difference and a second functional relationship of the rate of change of the distance of the interference source from the communication satellite with respect to the frequency difference are established.
Specifically, the distance between the main satellite and the corresponding fixed antenna, the distance between the adjacent satellite and the corresponding fixed antenna, the distance between the interference source and the main satellite, and the distance between the interference source and the adjacent satellite may be calculated according to parameters of the main satellite and the adjacent satellite, such as the altitude, the operating speed, and the like.
A first functional relationship of the position of the interference source with respect to the time difference is as follows:
(dm2-dm1)+(d2-d1)＝c(tm2-tm1)＝cTDOA
wherein d ism1Distance of the primary satellite from the corresponding fixed antenna, dm2Distance of adjacent satellite to corresponding fixed antenna, d1Distance of interference source from primary satellite, d2Is the distance between the interference source and the adjacent satellite, and c is the speed of light.
The second functional relationship of the position of the interference source with respect to the frequency difference is as follows:
Hm1(f1)-Hm2(f2)+(H2-H2)f0＝c(fd2-fd1)＝cFDOA
wherein Hm1Is the rate of change of the distance, H, of the primary satellite from the corresponding fixed antennam2Is the rate of change of the distance of the adjacent satellite from the corresponding fixed antenna, f1Frequency offset of the downlink of the primary satellite, f2Frequency offset, H, for the downlink of the adjacent satellite1Is the rate of change of the distance of the primary satellite from the interference source, H2Is the rate of change of the distance of the adjacent satellite from the interference source, f0As the transmission frequency of the interference source, fd1Down-link retransmission carrier frequency, f, of primary satellited2The carrier frequency is the downlink forwarding carrier frequency of the adjacent satellite, and c is the speed of light.
2. A contour of the time difference is determined based on the first functional relationship and a contour of the frequency difference is determined based on the second functional relationship.
The first functional relation determines the functional relation between the position of the interference source and the time difference, the second functional relation determines the functional relation between the position of the interference source and the frequency difference, and by utilizing the relations, the isoline of the time difference and the isoline of the frequency difference can be established on the earth surface. Specifically, the iso-lines of the T time differences are distributed along the longitudinal direction to form a single-sheet hyperboloid, and the iso-lines of the frequency differences are distributed approximately along the latitudinal direction to form a tire-like curve.
3. And taking the intersection point of the contour line of the time difference and the contour line of the frequency difference on the ground surface as the position of the interference source.
Specifically, the intersection of the time difference contour and the frequency difference contour forms an elliptical region on the earth's surface, i.e., where the interference source is located.
In a conventional positioning means, when a certain star is positioned for the first time, an antenna needs to be rotated to search for an adjacent star. In the embodiment of the invention, the data signals of all communication satellites are accessed simultaneously, when the best adjacent satellite is searched, the positioning calculation is only carried out on the adjacent communication satellite combination, the combination with the best positioning effect is taken as the adjacent satellite of the main satellite, and the best adjacent satellite combination is subsequently adopted for the positioning calculation. For example, in the embodiment of the present invention, the position accuracy of the interference source obtained by combining the main satellite with each adjacent communication satellite is calculated, and then the combined communication satellite with the highest position accuracy is used as the adjacent satellite of the main satellite. Specifically, when a certain satellite is first located, a plurality of satellite combinations are selected, where a satellite combination includes the communication satellite and two adjacent communication satellites, the location method of the ground interference source of the communication satellite according to the embodiment of the present invention calculates the location of the interference source under each combination, compares the calculated location of the interference source under each combination with the actual location of the interference source, calculates the deviation between the location of the interference source under each combination and the actual location of the interference source, uses the combination with the minimum deviation as two adjacent satellites of the main satellite, and then uses the best adjacent satellite combination for location calculation. Therefore, the antenna does not need to be rotated to search for the adjacent star, and the labor cost is saved.
The method for positioning the ground interference source of the communication satellite provided by the embodiment of the invention comprises the following steps: the method comprises the steps of obtaining data signals returned by all communication satellites in a visual area to corresponding fixed antennas, wherein each communication satellite is provided with one corresponding fixed antenna, calculating the time difference and the frequency difference between a main satellite signal returned by the main satellite and adjacent satellite signals returned by two adjacent satellites, wherein the main satellite is any one of the communication satellites in the visual area, the main satellite signal is the data signal returned by the main satellite, the adjacent satellite signals are the data signals returned by the adjacent satellites, and determining the position of an interference source of the main satellite based on the time difference and the frequency difference. Each communication satellite is provided with a corresponding fixed antenna, and the position of an interference source of the main satellite is calculated based on the time difference and the frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by the two adjacent satellites, so that the cost is saved, and the positioning precision is improved.
Example two
An embodiment of the present invention provides a communication satellite ground interference source positioning device, and fig. 2 is a schematic structural diagram of the communication satellite ground interference source positioning device provided in the embodiment of the present invention, as shown in fig. 2, the device includes:
a data signal acquiring module 201, configured to acquire data signals returned by all communication satellites in a visible area to corresponding fixed antennas, where each communication satellite is provided with a corresponding fixed antenna;
the calculating module 202 is configured to calculate a time difference and a frequency difference between a main satellite signal returned by a main satellite and adjacent satellite signals returned by two adjacent satellites, where the main satellite is any one of all communication satellites in a visible area, the main satellite signal is a data signal returned by the main satellite, and the adjacent satellite signals are data signals returned by the adjacent satellites;
a position determination module 203 for determining a position of an interferer of the primary satellite based on the time difference and the frequency difference.
In some embodiments of the invention, the calculation module 202 comprises:
the down-conversion submodule is used for performing down-conversion processing on the data signals returned by the target satellite and the data signals returned by the two adjacent communication satellites;
and the correlation processing submodule is used for performing correlation processing on the main satellite signal and the adjacent satellite signal after the down-conversion processing by adopting an orthogonal fuzzy function to obtain the time difference and the frequency difference between the main satellite signal and the adjacent satellite signal.
In some embodiments of the invention, the correlation processing submodule comprises:
an envelope function constructing unit, configured to construct a first complex envelope function of the primary satellite signal with respect to time and a second complex envelope function of the neighboring satellite signal with respect to time;
an orthogonal fuzzy function constructing unit, configured to construct an orthogonal fuzzy function based on the first complex envelope function and the second complex envelope function;
a maximum value calculation unit for calculating a maximum value of the orthogonal blur function;
and the time-frequency difference determining unit is used for taking the time difference and the frequency difference of the maximum value of the orthogonal ambiguity function as the time difference and the frequency difference of the main satellite signal and the adjacent satellite signal.
In some embodiments of the present invention, the communication satellite terrestrial interference source positioning device further comprises:
the known signal acquisition module is used for acquiring known signals returned by the main satellite and the adjacent satellites after calculating the time difference and the frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by the adjacent two adjacent satellites;
and the phase calibration module is used for performing phase calibration on the frequency difference by using the known signal and filtering local oscillator drift of the communication satellite.
In some embodiments of the invention, the location determination module 203 comprises:
the functional relation establishing submodule is used for establishing a first functional relation of the distance between the interference source and the communication satellite about the time difference and establishing a second functional relation of the distance change rate between the interference source and the communication satellite about the frequency difference;
a contour determination sub-module for determining a contour of the time difference based on the first functional relationship and a contour of the frequency difference based on the second functional relationship;
and the position determination submodule is used for taking the intersection point of the contour line of the time difference and the contour line of the frequency difference on the ground surface as the position of the interference source.
In some embodiments of the present invention, the communication satellite terrestrial interference source positioning device further comprises:
the position precision calculation module is used for calculating the position precision of an interference source obtained by the combination of the main satellite and each adjacent communication satellite before calculating the time difference and the frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by the adjacent two adjacent satellites;
and the adjacent satellite determining module is used for taking the combined communication satellite with the highest position precision as the adjacent satellite of the main satellite.
In some embodiments of the invention, the position accuracy calculation module comprises:
the position calculation submodule is used for calculating the position of an interference source obtained by combining the main satellite and each adjacent satellite;
the deviation calculation submodule is used for calculating the deviation between the position of each combined interference source and the actual position of the interference source;
and the adjacent satellite determining submodule is used for taking the combination with the minimum deviation as two adjacent satellites of the main satellite.
The communication satellite ground interference source positioning device can execute the communication satellite ground interference source positioning method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects for executing the communication satellite ground interference source positioning method.
EXAMPLE III
A third embodiment of the present invention provides a computer device, and fig. 3 is a schematic structural diagram of a computer device provided in the third embodiment of the present invention, as shown in fig. 3, the computer device includes:
a processor 301, a memory 302, a communication module 303, an input device 304, and an output device 305; the number of the processors 301 in the mobile terminal may be one or more, and one processor 301 is taken as an example in fig. 3; the processor 301, the memory 302, the communication module 303, the input device 304 and the output device 305 in the mobile terminal may be connected by a bus or other means, and fig. 3 illustrates the connection by a bus as an example. The processor 301, the memory 302, the communication module 303, the input means 304 and the output means 305 described above may be integrated on a computer device.
The memory 302 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, and modules, such as the modules corresponding to the method for positioning a terrestrial interference source of a communication satellite in the above embodiments. The processor 301 executes various functional applications and data processing of the computer device by executing the software programs, instructions and modules stored in the memory 302, so as to implement the above-mentioned method for positioning the terrestrial interference source of the communication satellite.
The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the microcomputer, and the like. Further, the memory 302 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 302 may further include memory located remotely from the processor 301, which may be connected to an electronic device through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The communication module 303 is configured to establish a connection with an external device (e.g., an intelligent terminal), and implement data interaction with the external device. The input means 304 may be used to receive input numeric or character information and to generate key signal inputs relating to user settings and function controls of the computer device.
The computer device provided by this embodiment may execute the method for positioning a terrestrial interference source of a communication satellite provided by any of the above embodiments of the present invention, and has corresponding functions and beneficial effects.
Example four
An embodiment of the present invention provides a storage medium containing computer-executable instructions, where the storage medium stores a computer program, and the computer program is executed by a processor to implement a method for positioning a terrestrial interference source of a communication satellite according to any of the above embodiments of the present invention, where the method includes:
acquiring data signals returned by all communication satellites in a visible area to corresponding fixed antennas, wherein each communication satellite is provided with a corresponding fixed antenna;
calculating time difference and frequency difference between a main satellite signal returned by the main satellite and adjacent satellite signals returned by two adjacent satellites, wherein the main satellite is any one of all communication satellites in a visible area, the main satellite signal is a data signal returned by the main satellite, and the adjacent satellite signals are data signals returned by the adjacent satellites;
determining a location of an interferer to the primary satellite based on the time difference and the frequency difference.
It should be noted that, as for the apparatus, the device and the storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and in relevant places, reference may be made to the partial description of the method embodiments.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, and the computer software product may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions to enable a computer device (which may be a robot, a personal computer, a server, or a network device) to execute the method for positioning a terrestrial interference source of a communication satellite according to any embodiment of the present invention.
It should be noted that, in the above apparatus, each module, sub-module, and unit included in the apparatus is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, the specific names of the functional modules are only for convenience of distinguishing from each other and are not used for limiting the protection scope of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by suitable instruction execution devices. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method for positioning a ground interference source of a communication satellite is characterized by comprising the following steps:
acquiring data signals returned by all communication satellites in a visible area to corresponding fixed antennas, wherein each communication satellite is provided with a corresponding fixed antenna;
calculating time difference and frequency difference between a main satellite signal returned by the main satellite and adjacent satellite signals returned by two adjacent satellites, wherein the main satellite is any one of all communication satellites in a visible area, the main satellite signal is a data signal returned by the main satellite, and the adjacent satellite signals are data signals returned by the adjacent satellites;
determining a location of an interferer to the primary satellite based on the time difference and the frequency difference.
2. The method of claim 1, wherein calculating the time difference and frequency difference between the main satellite signal returned by the main satellite and the adjacent satellite signals returned by two adjacent satellites comprises:
carrying out down-conversion processing on a data signal returned by the target satellite and data signals returned by two adjacent communication satellites;
and performing correlation processing on the main satellite signals and the adjacent satellite signals after the down-conversion processing by adopting an orthogonal fuzzy function to obtain the time difference and the frequency difference of the main satellite signals and the adjacent satellite signals.
3. The method according to claim 1, wherein the correlation processing is performed on the down-converted dominant satellite signal and the adjacent satellite signal by using an orthogonal ambiguity function to obtain the time difference and the frequency difference between the dominant satellite signal and the adjacent satellite signal, and the method comprises:
constructing a first complex envelope function of the main satellite signal with respect to time and a second complex envelope function of the adjacent satellite signal with respect to time;
constructing an orthogonal blur function based on the first complex envelope function and the second complex envelope function;
calculating a maximum value of the orthogonal ambiguity function;
and taking the time difference and the frequency difference of the maximum value of the orthogonal fuzzy function as the time difference and the frequency difference of the main satellite signal and the adjacent satellite signal.
4. The method for locating a terrestrial interference source of a communication satellite according to any one of claims 1 to 3, wherein after calculating the time difference and the frequency difference between the signal of the main satellite returned by the main satellite and the signal of the adjacent satellite returned by the adjacent two adjacent satellites, the method further comprises:
acquiring known signals returned by a main satellite and an adjacent satellite;
and carrying out phase calibration on the frequency difference by using the known signal, and filtering local oscillator drift of the communication satellite.
5. The method according to any one of claims 1-3, wherein determining the location of the interference source of the primary satellite based on the time difference and the frequency difference comprises:
establishing a first functional relationship of the distance between the interference source and the communication satellite relative to the time difference and establishing a second functional relationship of the distance change rate between the interference source and the communication satellite relative to the frequency difference;
determining a contour of the time difference based on the first functional relationship and determining a contour of the frequency difference based on the second functional relationship;
and taking the intersection point of the contour line of the time difference and the contour line of the frequency difference on the ground surface as the position of the interference source.
6. The method for locating a terrestrial interference source of a communication satellite according to any one of claims 1 to 3, wherein before calculating the time difference and the frequency difference between the signal of the main satellite returned by the main satellite and the signal of the adjacent satellite returned by the adjacent two adjacent satellites, the method further comprises:
calculating the position precision of the interference source obtained by the combination of the main satellite and each adjacent communication satellite;
and taking the combined communication satellite with the highest position precision as a neighboring satellite of the main satellite.
7. The method of claim 6, wherein calculating the position accuracy of the interference source obtained by combining the primary satellite with each neighboring satellite comprises:
calculating the position of an interference source obtained by the combination of the main satellite and each adjacent satellite;
calculating the deviation of the position of each combined interference source from the actual position of the interference source;
and taking the combination with the minimum deviation as two adjacent satellites of the main satellite.
8. A communication satellite terrestrial interference source positioning device, comprising:
the data signal acquisition module is used for acquiring data signals returned by all communication satellites in a visible area to corresponding fixed antennas, wherein each communication satellite is provided with a corresponding fixed antenna;
the computing module is used for computing the time difference and the frequency difference between a main satellite signal returned by a main satellite and adjacent satellite signals returned by two adjacent satellites, wherein the main satellite is any one of all communication satellites in a visible area, the main satellite signal is a data signal returned by the main satellite, and the adjacent satellite signals are data signals returned by the adjacent satellites;
a location determination module to determine a location of an interferer to the primary satellite based on the time difference and the frequency difference.
9. A computer device, comprising:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the method of communication satellite terrestrial interference source positioning according to any of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method for positioning a terrestrial interference source for a communications satellite according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111012735.2A CN113765578A (en) | 2021-08-31 | 2021-08-31 | Method, device, equipment and storage medium for positioning ground interference source of communication satellite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111012735.2A CN113765578A (en) | 2021-08-31 | 2021-08-31 | Method, device, equipment and storage medium for positioning ground interference source of communication satellite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113765578A true CN113765578A (en) | 2021-12-07 |
Family
ID=78792109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111012735.2A Pending CN113765578A (en) | 2021-08-31 | 2021-08-31 | Method, device, equipment and storage medium for positioning ground interference source of communication satellite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113765578A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024032372A1 (en) * | 2022-08-10 | 2024-02-15 | 华为技术有限公司 | Positioning method and related apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5594452A (en) * | 1994-12-01 | 1997-01-14 | Interferometrics, Inc. | Method and system for locating an unknown transmitter using calibrated oscillator phases |
| CN1200811A (en) * | 1995-09-20 | 1998-12-02 | 英国国防部 | Locating source of unknown signal |
| CN102331581A (en) * | 2011-05-27 | 2012-01-25 | 哈尔滨工业大学 | Rapid positioning method of binary TDOA/FDOA satellite-to-earth integration positioning system |
| CN103576166A (en) * | 2012-08-06 | 2014-02-12 | 国家无线电监测中心 | Method and system for positioning interference source based on single stationary orbit satellite |
| CN109507704A (en) * | 2018-11-29 | 2019-03-22 | 南京邮电大学 | A kind of Double-Star Positioning System frequency difference estimation method based on cross ambiguity function |
-
2021
- 2021-08-31 CN CN202111012735.2A patent/CN113765578A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5594452A (en) * | 1994-12-01 | 1997-01-14 | Interferometrics, Inc. | Method and system for locating an unknown transmitter using calibrated oscillator phases |
| CN1200811A (en) * | 1995-09-20 | 1998-12-02 | 英国国防部 | Locating source of unknown signal |
| CN102331581A (en) * | 2011-05-27 | 2012-01-25 | 哈尔滨工业大学 | Rapid positioning method of binary TDOA/FDOA satellite-to-earth integration positioning system |
| CN103576166A (en) * | 2012-08-06 | 2014-02-12 | 国家无线电监测中心 | Method and system for positioning interference source based on single stationary orbit satellite |
| CN109507704A (en) * | 2018-11-29 | 2019-03-22 | 南京邮电大学 | A kind of Double-Star Positioning System frequency difference estimation method based on cross ambiguity function |
Non-Patent Citations (2)
| Title |
|---|
| 李晓红: ""基于时延差和频移差参数的卫星干扰源定位方法的研究"", 《中国优秀硕士学位论文全文数据库》 * |
| 李晨，魏梅英: ""对地静止轨道卫星转发干扰源定位分析"", 《2013全国无线及移动通信学术大会论文集（下）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024032372A1 (en) * | 2022-08-10 | 2024-02-15 | 华为技术有限公司 | Positioning method and related apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10601493B2 (en) | Disadvantaged node discovery | |
| Huang et al. | A hybrid adaptive antenna array | |
| US11079493B2 (en) | Determination of integrity of incoming satellite signals of satellite navigation system and mitigation of unwanted signals | |
| Godrich et al. | Target localization accuracy gain in MIMO radar-based systems | |
| Huang et al. | Frequency-domain AoA estimation and beamforming with wideband hybrid arrays | |
| JP4592506B2 (en) | Uplink interference source locating apparatus and method | |
| US10684347B2 (en) | Systems and methods for measuring terrestrial spectrum from space | |
| EP1547278B1 (en) | Signal, interference and noise power measurement | |
| Chiba et al. | Digital beam forming (DBF) antenna system for mobile communications | |
| CN1236437A (en) | Position determination using multiple base station signal | |
| CN110118978B (en) | Navigation anti-interference system and navigation anti-interference method based on low-earth-orbit satellite | |
| CN110907972B (en) | Position positioning method, speed positioning method, device and positioning terminal | |
| JP4049224B2 (en) | Terminal location using multiple beams | |
| CN113765578A (en) | Method, device, equipment and storage medium for positioning ground interference source of communication satellite | |
| US20020090025A1 (en) | Rake erceiver for spread spectrum signal demodulation | |
| Last et al. | Effect of skywave interference on coverage of radiobeacon DGPS stations | |
| CN112152696A (en) | Uplink interference geographic positioning method and system for high-throughput satellite | |
| Wang et al. | Deception jamming detection based on beam scanning for satellite navigation systems | |
| JPH09113615A (en) | Interferometry sar system | |
| Tuan et al. | Performance comparison of millimeter-wave communications system with different antenna beamwidth | |
| Yuan et al. | Satellite navigation method based on high-speed frequency hopping signal | |
| Shcherbyna et al. | Prospect for using low-element adaptive antenna systems for radio monitoring stations | |
| EP0096144B1 (en) | System for the cancellation of intentional disturbance applied to a monopulse phased array radar | |
| US4617570A (en) | Interference cancelling receiver having high angular resolution intercept of transmitted radiators | |
| He et al. | A novel wireless positioning approach based on distributed stochastic-resonance-enhanced power spectrum fusion technique |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211207 |
|
| RJ01 | Rejection of invention patent application after publication |