CN113866717A - Method for searching and positioning interference source of satellite navigation system - Google Patents
Method for searching and positioning interference source of satellite navigation system Download PDFInfo
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- CN113866717A CN113866717A CN202111162086.4A CN202111162086A CN113866717A CN 113866717 A CN113866717 A CN 113866717A CN 202111162086 A CN202111162086 A CN 202111162086A CN 113866717 A CN113866717 A CN 113866717A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/04—Position of source determined by a plurality of spaced direction-finders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
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Abstract
The invention belongs to the technical field of interference source searching and positioning methods, and aims to solve the problem that when electromagnetic interference is encountered in the operation process of the conventional satellite navigation system, the method has the technical problems of technical limitation, space-time limitation and environmental limitation, and provides a method for searching and positioning the interference source of the satellite navigation system, wherein the specific position of the interference source is difficult to obtain, a single electromagnetic interference searching device method is used, the interference source is monitored and analyzed by using a maximum signal method, the direction of the interference source is measured by using a relevant interferometer, the initial incoming wave direction is obtained, according to the initial incoming wave direction, an accurate interference incoming wave direction is obtained by adopting a maximum signal method and a correlation interferometer direction-finding combined method, three monitoring stations are arranged, whether interference signals monitored by the three monitoring stations are the same signal or not is judged, and positioning area information is obtained through direction-finding cross positioning to obtain the position of an interference source.
Description
Technical Field
The invention belongs to the technical field of interference source searching and positioning methods, and particularly relates to an interference source searching and positioning method of a satellite navigation system.
Background
The Beidou satellite navigation system becomes an important infrastructure for all-weather, all-time and high-precision positioning, navigation and time service, and has great economic and scientific significance.
However, the satellite navigation system faces a severe electromagnetic interference problem in the operation process, and in an actual propagation environment, the satellite navigation system cannot predict the type and characteristics of the received interference, so how to monitor and identify the satellite navigation interference signal and obtain the specific position of the interference source has gradually become a research hotspot in the field of satellite navigation safety application. At present, a single electromagnetic interference searching device is mostly adopted to monitor and identify interference signals, but a single electromagnetic interference searching device method is adopted, so that the method has technical limitations, space-time limitations and environmental limitations.
Disclosure of Invention
The invention provides a method for searching and positioning an interference source of a satellite navigation system, aiming at solving the technical problems that the specific position of the interference source is difficult to obtain when the electromagnetic interference is encountered in the operation process of the satellite navigation system at present, and the technical limitations of technology, space-time limitation and environment limitation are realized by using a single electromagnetic interference searching equipment method.
The invention provides the following technical scheme for achieving the purpose:
a satellite navigation system interference source searching and positioning method is characterized by comprising the following steps:
s1, finding interference source
Monitoring and analyzing the interference source by using a maximum signal method; if the sensitivity is greater than the preset sensitivity of the direction-finding equipment by the maximum signal method, executing step S2; otherwise, with the current position as a reference point, by moving the direction-finding equipment by the maximum signal method, searching for the interference source by the maximum signal method until the detected interference source signal is greater than the preset sensitivity of the direction-finding equipment by the maximum signal method, and executing the step S2;
s2, direction finding of interference source
Utilizing a correlation interferometer to carry out direction finding on the interference source, if the direction finding sensitivity requirement of the correlation interferometer is met, utilizing the direction finding of the correlation interferometer to obtain an initial incoming wave direction, otherwise, utilizing a maximum signal method to obtain a coarse angle of the interference source, and taking the coarse angle as the initial incoming wave direction;
s3, positioning interference source
S3.1, obtaining an accurate interference incoming wave direction by adopting a method of combining a maximum signal method and a direction finding of a correlation interferometer according to an initial incoming wave direction, and arranging a first monitoring station at the position of the correlation interferometer according to the accurate interference incoming wave direction;
s3.2, respectively arranging a second monitoring station and a third monitoring station on one side, close to the reference direction, of two straight lines with an included angle of 30 degrees with the reference direction, judging whether interference signals monitored by the three monitoring stations are the same signal or not through a signal characteristic comprehensive identification direction-finding technology, if so, executing a step S3.3, otherwise, finding the same interference signal through in-band power, an amplitude value, a modulation mode, frequency information, azimuth information and interference occurrence time information, and then executing the step S3.3;
and S3.3, moving the first monitoring station towards the reference direction, carrying out direction finding by using a related interferometer, moving the second monitoring station and the third monitoring station towards the reference direction along two straight lines with an included angle of 30 degrees with the reference direction respectively, and obtaining positioning area information through direction finding cross positioning until the positioning area is at the center of the inside of a triangle formed by taking the three monitoring stations as vertexes, wherein the positioning area is the position of the interference source.
Further, in step S3.1, the moving the direction-finding device by the maximum signal method searches for the interference source by using the maximum signal method, specifically:
moving the direction-finding equipment by the maximum signal method in eight directions of up, down, left, right, upper left, lower right and lower left respectively, synchronously observing the frequency spectrum characteristic information and the power information of the interference source signal, and searching the interference source by the maximum signal method.
Further, the step S3.1 specifically includes:
and moving the correlation interferometer to gradually approach the initial incoming wave direction, simultaneously, carrying out direction finding by using the correlation interferometer, calibrating the direction finding by using a maximum signal method until the fluctuation of the output direction finding angle information is kept within a preset error range to obtain an accurate interference incoming wave direction, and arranging a first monitoring station at the position of the correlation interferometer by taking the accurate interference incoming wave direction as a reference direction.
Further, the method for comprehensively identifying and direction-finding through signal characteristics judges whether the interference signals monitored by the three monitoring stations are the same signal, and specifically comprises the following steps:
and identifying the in-band power, amplitude value, modulation mode, frequency information and azimuth information of the interference source signal at the three monitoring sites respectively through a signal characteristic comprehensive identification direction-finding technology, wherein if the in-band power, amplitude value, modulation mode, frequency information and azimuth information are the same, the three monitoring sites monitor the same signal, otherwise, the three monitoring sites monitor different signals.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a method for searching and positioning an interference source according to the existing frequency spectrum monitoring means and direction finding algorithm, in combination with the complexity of the cause of satellite navigation electromagnetic interference and the application limitations (including technical limitations, space-time limitations, environmental limitations and the like) of electromagnetic interference searching equipment, and can be used for rapidly monitoring, identifying, searching and positioning satellite navigation interference.
2. The invention adopts a method of combining the maximum signal method and the direction-finding of the correlation interferometer, the maximum signal method adopts a high-gain antenna, the system sensitivity is high, the monitoring direction-finding of weak and small signals can be satisfied, but the direction-finding precision is low, the direction-finding of the correlation interferometer adopts an omnidirectional antenna unit, the system sensitivity is low, but the direction-finding precision is high, and the direction-finding speed is high, therefore, the combined method can overcome the defects of any method independently, and can realize the rapid monitoring direction-finding of weak interference signals.
3. When the accurate arrival direction of the interference signal is confirmed, whether the signals monitored by the three monitoring stations are the same signal or not is confirmed through a signal characteristic comprehensive identification direction-finding technology, so that the initial error generated in the monitoring process is avoided, and the subsequent monitoring judgment is not influenced.
4. The invention adopts a method of jointly positioning three monitoring sites, so that the monitoring precision is higher, and the misjudgment caused by single monitoring is avoided.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of the present invention;
FIG. 2 is a schematic illustration of a three-station co-location of a Y-lay station in an embodiment of the present invention;
fig. 3 is a schematic diagram of three-station cooperative multiple cross-location in an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments do not limit the present invention.
The invention provides a method for searching and positioning an interference source of a satellite navigation system, which aims to improve the direction-finding capability of weak signals and adopts the direction-finding of a maximum signal method and the direction-finding of a correlation interferometer to jointly measure the direction. When the equipment finds the interference, the accurate direction of the interference source is confirmed by using an approximation method, and when the signal direction is confirmed to have no problem, one equipment is fixed at the point to conduct direction finding of the interference source. The other two sets of equipment are directed forward along the two bifurcations of Y. When the intersection point formed by the three sets of equipment in the direction finding is near the inner center of the triangle with the three sets of equipment as vertexes, the direction finding result is accurate, and the direction finding positioning is finished. In order to ensure that three monitoring stations perform direction-finding cross positioning aiming at the same interference source in the direction-finding positioning process, based on the direction-finding technology of the maximum signal method and the direction-finding technology of a related interferometer, the maximum signal method is to control an antenna to rotate and measure 360 degrees at intervals according to a certain degree, and the amplitude value of a signal in which direction is the largest is compared, the direction is the direction of the interference source obtained by adopting the maximum signal method, information such as the spectral characteristics of the interference signal of the interference source can be obtained in the process, and the direction-finding precision of the related interferometer is high, but the direction of a radio signal is determined by utilizing the phase relation generated by the time difference between different antenna array elements in an antenna array with the fixed distance of the interference signal, so that the spectral characteristic information cannot be obtained. By utilizing a signal characteristic comprehensive identification algorithm to identify and compare characteristic parameters such as in-band power, amplitude value and modulation mode of the interference signal, whether direction-finding cross positioning is carried out aiming at the same interference source can be determined.
Generally, the indicators for measuring the quality of the received signal of the satellite navigation terminal are the signal-to-noise ratio SNR and the carrier-to-noise ratio CNR. The indexes for measuring the interference strength of the satellite navigation terminal comprise an interference-to-noise ratio JNR, an interference-to-signal ratio JSR and an interference-to-signal ratio JNR. In practical application, whether the satellite navigation terminal is interfered by the electromagnetic interference signal is generally judged and measured through the indexes. Some basic concepts involved in the present invention are explained first as follows:
1. principle for suppressing interference detection receiver operation
The high-power signal is transmitted by the compression system interference, so that the noise power of a tracking loop is increased, and the power spectral density curve of the intermediate-frequency signal is distorted. The intermediate frequency signal is sensitive to the high-power signal, and meanwhile, the intermediate frequency signal is not subjected to de-spreading and frequency-spreading processing, so that the characteristics of the interference signal can be estimated more accurately. Therefore, in the stage of the intermediate frequency signal, the interference suppression detection receiver is combined with the interference suppression identification algorithm, and the frequency domain and time frequency analysis method is adopted to identify the interference signal and estimate characteristic parameters including frequency, power, bandwidth, modulation mode, period, duty ratio and the like.
2. Principle of operation of deception jamming detection receiver
The spoofed signal and the real signal have a certain difference on a certain attribute, and the attribute comprises a signal arrival angle, position information, time information, a pseudo range, a signal carrier-to-noise ratio, signal power, a navigation message, a Doppler frequency shift and the like. Because the influence of the deception jamming on the intermediate frequency signal is not obvious, but the deception delay can cause the characteristic phenomena of related curve distortion and abnormal navigation calculation, the deception jamming detection receiver is combined with a deception jamming identification algorithm to identify the jamming signal and estimate the characteristic parameters.
3. Principle of maximum signal method and related interferometer direction finding receiver
In order to improve the direction-finding capability of weak signals, the direction-finding method of the maximum signal method and the direction-finding method of the correlation interferometer are adopted to carry out direction-finding on interference signals. The maximum signal method adopts a high-gain antenna, so that the system sensitivity is high, the monitoring direction-finding of weak and small signals can be met, but the direction-finding precision is low; the direction finding of the correlation interferometer adopts the omnidirectional antenna unit, so that the system sensitivity is low, but the direction finding precision is high, and the direction finding speed is high. The two are combined with each other to realize the rapid monitoring and direction finding of weak interference signals.
4. Principle of distributed multi-station cooperative cross positioning method
By measuring the incident angle of the signal from the interference source to each monitoring station, ideally, the ratio of three rays which take the monitoring station as a starting point and the arrival angle as a direction intersects with a limited area, which is the area where the interference source target is located.
The method is suitable for positioning the interference sources with various bandwidth systems, but has the defect that after the incoming wave direction of each monitoring station is determined, the positioning error is increased along with the increase of the distance from the interference source. Therefore, in practical application, the cross positioning of the interference source is mostly carried out by adopting a Y-shaped station distribution mode, and the influence of the distance factor from the interference source on the positioning error is reduced.
In order to realize the positioning method of the invention, related equipment can be set up firstly, the equipment comprises a deception jamming detection receiver, a suppression jamming detection receiver, a related interferometer detection direction-finding receiver and a maximum signal method monitoring direction-finding receiver, the deception jamming detection receiver and the suppression jamming detection receiver are respectively detected through respective receiving antennas, the deception jamming detection receiver and the suppression jamming detection receiver are both installed on corresponding mobile carrier platforms nearby, the related interferometer detection direction-finding receiver is connected with a related interferometer direction-finding antenna array, the maximum signal method monitoring direction-finding receiver is connected with a high-gain antenna, the deception jamming detection receiver, the suppression jamming detection receiver, the related interferometer detection direction-finding receiver and the maximum signal method monitoring direction-finding receiver are all installed on the mobile carrier platforms respectively, and the four equipment are independent, in the positioning process, the detected data is subjected to fusion processing at the back end.
Referring to fig. 1, the positioning method of the present invention comprises the following steps:
firstly, interference existence detection is carried out on a received interference signal, and after the satellite navigation terminal is judged to be interfered, whether an interference source is deception interference or suppression interference is judged by utilizing a deception interference detection receiver and a suppression interference detection receiver in combination with a deception interference detection algorithm and a suppression interference detection algorithm.
After judging whether the interference suffered by the satellite navigation receiver is deception interference or suppression interference, if the interference is deception interference, analyzing information such as the type, power, arrival angle and the like of the deception interference; if the interference is suppressed, analyzing the information of interference signal system, power, center frequency, bandwidth and the like.
Then, monitoring and analyzing the interference signal by using a maximum signal method, if an obvious interference source signal can be found, carrying out direction finding on the interference source by using a direction finding method combining the maximum signal method and a related interferometer to obtain accurate direction information of the interference source, wherein the obvious degree depends on the detection sensitivity of the adopted equipment, and is higher than the detection sensitivity of the equipment by 20dB for example; the method comprises the steps of entering an interference source searching stage, moving the maximum signal method direction-finding equipment in eight directions including up, down, left, right, upper left, lower right and lower left by taking the current position as a reference point according to actual conditions, continuously observing information such as frequency spectrum characteristic information, power and the like of the interference signals in the moving process, searching the interference source by using the maximum signal method until the obvious interference source signal can be successfully found by using the maximum signal method, entering a combined direction-finding process of the maximum signal method direction-finding and the related interferometer direction-finding, and obtaining accurate azimuth information of the interference source. In an actual environment, the mobile device may not move in eight directions, namely, up, down, left, right, up-left, down-right and down-left, due to factors such as local terrain, and in this case, the search signal may be moved according to an actual field state.
The maximum signal method adopts a high-gain antenna, so that the system sensitivity is high, the monitoring direction-finding of weak and small signals can be met, but the direction-finding precision is low; the direction finding of the correlation interferometer adopts the omnidirectional antenna unit, so that the system sensitivity is low, but the direction finding precision is high, and the direction finding speed is high. The two are combined with each other to realize the rapid monitoring and direction finding of weak interference signals.
Using a correlation interferometer to carry out direction finding on an interference signal, if the direction finding requirement of the correlation interferometer can be met, using the direction finding of the correlation interferometer to obtain an initial incoming wave direction, gradually approaching the initial incoming wave direction, continuously using the correlation interferometer to carry out direction finding until the output direction finding angle information is stable, wherein the stability can adjust a stable evaluation standard according to specific conditions, for example, the direction finding sensitivity of equipment is less than or equal to 2 degrees (RMS), the result of multiple direction finding floats within-2 to +2 degrees, and outputting accurate information of the direction of the interference incoming wave; if the direction-finding requirement of the correlation interferometer is not met at first, the coarse angle of the interference signal is obtained by using a maximum signal method, the direction is taken as an initial direction, a successive approximation method is adopted, the correlation interferometer direction-finding equipment is gradually moved to the initial direction, the direction-finding is continuously carried out by using the correlation interferometer, meanwhile, the direction-finding of the maximum signal method is used for carrying out auxiliary calibration, the calibration refers to the fact that the wave directions of the interference signals given by the two kinds of equipment are compared with each other, the approximate directions are ensured to be consistent, mutual verification is carried out until the output direction-finding angle information is stable, and accurate interference wave direction information is output.
When the direction finding by the maximum signal method and the direction finding of the correlation interferometer are carried out in a combined direction finding mode, the direction finding technology is comprehensively identified by combining signal characteristics, and the same interference source is guaranteed to be aimed at in the direction finding and positioning process.
On a plurality of monitoring sites, obtaining related information such as spectrum characteristics of an interference source by using a maximum signal method direction finding and related interferometer direction finding combined direction finding device, automatically identifying and comparing characteristic parameters such as in-band power, amplitude values, modulation modes, frequency information and azimuth information of the signal by using a signal characteristic comprehensive identification algorithm, and determining whether direction finding positioning is carried out on the same interference source, wherein if the information monitored by each monitoring site is basically consistent, the same signal is considered.
Referring to fig. 2 and 3, after the device finds interference, firstly, the position of the interference source is roughly direction-measured by using a maximum signal method, the direction of the interference source obtained by using the maximum signal method is gradually approached, the direction is accurately measured by using a relevant interferometer, the approaching confirmation process is the vertical line of a letter Y in a Y-shaped station arrangement mode, the approaching judgment principle is that the closer the position is to the signal source, the higher the signal receiving strength is, the more accurate the direction measurement precision is, when the problem does not exist in the coming direction of the signal, the middle point equivalent to the letter Y in the Y-shaped station arrangement mode is reached, the direction measurement angle of the interference source obtained at the moment is taken as a reference direction, the monitoring station at the moment is named as a first monitoring station, the arrangement movement paths of the other two second monitoring stations and the third monitoring station are arranged according to the principle that the included angles of 30 degrees are respectively formed with the reference direction, and (5) direction finding cross positioning is carried out, and positioning area information is obtained. The angle is set to be 30 degrees, so that in the process of cross positioning, three monitoring stations can form an equilateral triangle.
And then, moving the position of the first monitoring station towards the reference direction, carrying out direction finding by using the related interferometer again, laying the movement routes of the second monitoring station and the third monitoring station according to the principle that the included angles of the movement routes and the direction of the current monitoring station 1 are 30 degrees respectively, carrying out direction finding cross positioning, and obtaining the information of the positioning area.
And moving the position for many times, and repeating the process until the positioning area is stable, so that the position of the interference source can be accurately obtained. When the intersection area formed by the direction measurement of the three sets of equipment is near the inner center of the triangle with the three sets of equipment as vertexes (namely, the position A in the figure 3), the direction measurement result is more accurate.
After the multi-station collaborative cross positioning is firstly positioned, the position of the first monitoring station is moved towards the reference direction, the related interferometer is repeatedly utilized again to carry out direction finding, and the positioning is more accurate along with the approach of the position of the distance interference source.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A satellite navigation system interference source searching and positioning method is characterized in that: the method comprises the following steps:
s1, finding interference source
Monitoring and analyzing the interference source by using a maximum signal method; if the sensitivity is greater than the preset sensitivity of the direction-finding equipment by the maximum signal method, executing step S2; otherwise, with the current position as a reference point, by moving the direction-finding equipment by the maximum signal method, searching for the interference source by the maximum signal method until the detected interference source signal is greater than the preset sensitivity of the direction-finding equipment by the maximum signal method, and executing the step S2;
s2, direction finding of interference source
Utilizing a correlation interferometer to carry out direction finding on the interference source, if the direction finding sensitivity requirement of the correlation interferometer is met, utilizing the direction finding of the correlation interferometer to obtain an initial incoming wave direction, otherwise, utilizing a maximum signal method to obtain a coarse angle of the interference source, and taking the coarse angle as the initial incoming wave direction;
s3, positioning interference source
S3.1, obtaining an accurate interference incoming wave direction by adopting a method of combining a maximum signal method and a direction finding of a correlation interferometer according to an initial incoming wave direction, and arranging a first monitoring station at the position of the correlation interferometer according to the accurate interference incoming wave direction;
s3.2, respectively arranging a second monitoring station and a third monitoring station on one side, close to the reference direction, of two straight lines with an included angle of 30 degrees with the reference direction, judging whether interference signals monitored by the three monitoring stations are the same signal or not through a signal characteristic comprehensive identification direction-finding technology, if so, executing a step S3.3, otherwise, finding the same interference signal through in-band power, an amplitude value, a modulation mode, frequency information, azimuth information and interference occurrence time information, and then executing the step S3.3;
and S3.3, moving the first monitoring station towards the reference direction, carrying out direction finding by using a related interferometer, moving the second monitoring station and the third monitoring station towards the reference direction along two straight lines with an included angle of 30 degrees with the reference direction respectively, and obtaining positioning area information through direction finding cross positioning until the positioning area is at the center of the inside of a triangle formed by taking the three monitoring stations as vertexes, wherein the positioning area is the position of the interference source.
2. The method as claimed in claim 1, wherein the method comprises: in step S3.1, the moving the direction-finding device by the maximum signal method searches for the interference source by using the maximum signal method, specifically:
moving the direction-finding equipment by the maximum signal method in eight directions of up, down, left, right, upper left, lower right and lower left respectively, synchronously observing the frequency spectrum characteristic information and the power information of the interference source signal, and searching the interference source by the maximum signal method.
3. The method as claimed in claim 1, wherein the method comprises: the step S3.1 specifically comprises the following steps:
and moving the correlation interferometer to gradually approach the initial incoming wave direction, simultaneously, carrying out direction finding by using the correlation interferometer, calibrating the direction finding by using a maximum signal method until the fluctuation of the output direction finding angle information is kept within a preset error range to obtain an accurate interference incoming wave direction, and arranging a first monitoring station at the position of the correlation interferometer by taking the accurate interference incoming wave direction as a reference direction.
4. The method according to claim 1, wherein in step S3.2, the method for determining whether the interference signals monitored by the three monitoring stations are the same signal by using the signal feature comprehensive identification direction finding technology specifically comprises:
and identifying the in-band power, amplitude value, modulation mode, frequency information and azimuth information of the interference source signal at the three monitoring sites respectively through a signal characteristic comprehensive identification direction-finding technology, wherein if the in-band power, amplitude value, modulation mode, frequency information and azimuth information are the same, the three monitoring sites monitor the same signal, otherwise, the three monitoring sites monitor different signals.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115598670A (en) * | 2022-09-29 | 2023-01-13 | 西安邮电大学（Cn） | Method for monitoring and positioning interference source by combining triangulation network and ant colony algorithm |
| CN115792801A (en) * | 2022-09-14 | 2023-03-14 | 中国人民解放军92728部队 | Multi-machine cross positioning radiation source signal matching method based on space criterion |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115792801A (en) * | 2022-09-14 | 2023-03-14 | 中国人民解放军92728部队 | Multi-machine cross positioning radiation source signal matching method based on space criterion |
| CN115792801B (en) * | 2022-09-14 | 2024-04-30 | 中国人民解放军92728部队 | Multi-machine cross positioning radiation source signal matching method based on space criterion |
| CN115598670A (en) * | 2022-09-29 | 2023-01-13 | 西安邮电大学（Cn） | Method for monitoring and positioning interference source by combining triangulation network and ant colony algorithm |
| CN115598670B (en) * | 2022-09-29 | 2024-03-05 | 西安邮电大学 | Method for monitoring and positioning interference source by combining triangular network and ant colony algorithm |
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