Satellite time service anti-interference and anti-cheating multi-level receiver reinforcing method

Abstract

The invention discloses a satellite time service anti-interference and anti-cheating multi-level receiver reinforcement method, which comprises the following steps that: an interference detection strategy of each preset interference detection dimension is obtained, a time service receiver carries out clock synchronization based on a satellite navigation system, each preset interference detection dimension corresponds to at least one interference detection strategy, and each preset interference detection dimension corresponds to at least one interference detection strategy; each interference detection strategy corresponds to a detectable interference type, and the interference type comprises natural environment interference, suppressing interference and deception interference; performing interference detection on the target time service receiver according to each interference detection strategy in a preset interference detection time period; and when any interference detection strategy is utilized to detect that the target time service receiver is interfered, obtaining an interference detection result of the target time service receiver in a preset interference detection time period according to the detected target interference type, and carrying out anti-interference reinforcement on the target time service receiver. And multi-level interference detection and reinforcement are carried out, so that the anti-interference performance of the time service receiver is improved.

Description

Technical Field

[0001] The present application relates to the field of cyberspace security technology, and in particular to a multi-level receiver reinforcement method for satellite timing to resist interference and deception. Background Art

[0002] Satellite timing uses the Global Navigation Satellite System (GNSS) to synchronize clocks and is widely used in various fields. In substations, satellite timing technology is also widely used, mainly to synchronize the clocks of various parts of the power system to ensure the stable operation of the power grid. Satellite timing can help substations achieve clock synchronization, automatic time calibration, provide accurate timestamp information and fault location, providing important support for the stable operation of the power grid.

[0003] In a complex electromagnetic environment, the interference faced by GNSS satellite timing receivers can be divided into three categories: natural environment interference, suppression interference and deceptive interference. Natural environment interference is often unintentional interference, without obvious interference or interference intention against the receiver. When the receiver is in a complex electromagnetic environment, it is very likely to suffer from this type of interference. Using a jammer to transmit interference signals to mask the GNSS signal spectrum in some way, so that the enemy GNSS receiver reduces or completely loses its normal working ability, is called suppression interference. Deceptive interference refers to the transmission of false signals with the same parameters as the GNSS signal, causing the GNSS receiver to generate incorrect positioning / timing information. Deceptive interference may be more harmful than suppression interference because deceptive interference will not even cause the receiver to generate any false alarms, which may cause harm to the system for a longer period of time.

[0004] Since the satellite timing system is a wireless communication system, it is easily interfered by various complex electromagnetic environments when propagating in space, and the satellite signal is a weak signal, and the signal power reaching the ground receiver is low (the minimum level of the Beidou satellite signal reaching the ground is only -160dBm), which is very susceptible to suppressive interference. After the receiver is interfered, it will lead to reduced accuracy or inability to work, and even after being deceptively interfered, it will provide false timing information, which in serious cases will lead to the paralysis of key social infrastructure measures and other consequences. Summary of the invention

[0005] In view of this, the present application provides a multi-level receiver reinforcement method for satellite timing anti-interference and anti-deception. For the multiple preset interference detection dimensions corresponding to the timing receiver, the interference detection strategy of each preset interference detection dimension is obtained. The timing receiver performs clock synchronization based on the satellite navigation system. Various preset interference detection dimensions correspond to at least one interference detection strategy, and each interference detection strategy corresponds to a detectable interference type, including natural environment interference, suppression interference and deception interference; within the preset interference detection period, the target timing receiver is subjected to interference detection according to each interference detection strategy; when any interference detection strategy is used to detect that the target timing receiver is interfered with, the interference detection result of the target timing receiver within the preset interference detection period is obtained according to the detected target interference type, and the target timing receiver is subjected to anti-interference reinforcement based on the interference detection result. Combined with the implementation structure and processing flow of the timing receiver, multi-level interference detection is performed, and suppression interference and deception attacks are comprehensively considered, which can improve the accuracy of interference detection, and then targeted reinforcement is performed to improve the anti-interference performance of the timing receiver.

[0006] According to one aspect of the present application, a multi-level receiver reinforcement method for satellite timing anti-interference and anti-spoofing is provided, the method comprising:

[0007] For multiple preset interference detection dimensions corresponding to the timing receiver, an interference detection strategy for each preset interference detection dimension is obtained, wherein the timing receiver performs clock synchronization based on a satellite navigation system, each preset interference detection dimension corresponds to at least one interference detection strategy, each interference detection strategy corresponds to a detectable interference type, and the interference type includes natural environment interference, suppression interference and deceptive interference;

[0008] During the preset interference detection period, interference detection is performed on the target timing receiver according to each interference detection strategy;

[0009] When any interference detection strategy is used to detect that the target timing receiver is interfered with, the interference detection result of the target timing receiver within a preset interference detection period is obtained according to the detected target interference type, and the target timing receiver is reinforced against interference based on the interference detection result.

[0010] Optionally, the target timing receiver includes multiple target timing receivers, the multiple target timing receivers respond to the same satellite navigation system, the preset interference detection dimension includes a signal dimension, a loop tracking dimension, a navigation message dimension and a position calibration dimension, and the interference detection is performed on the target timing receiver according to each interference detection strategy, including:

[0011] When the preset interference detection dimension is the signal dimension, the interference detection strategy includes that if it is detected that the signal power received by the target timing receiver has an increase rate greater than or equal to a preset increase threshold within the preset interference detection period, the target timing receiver is subjected to suppressive interference and / or deceptive interference;

[0012] When the preset interference detection dimension is the loop tracking dimension, the interference detection strategy includes that if it is detected that the relative position and / or relative speed between the satellite navigation system and the target timing receiver changes, the target timing receiver is subject to natural environment interference and / or deceptive interference;

[0013] When the preset interference detection dimension is the navigation message dimension, the interference detection strategy includes: if it is detected that there are differences in the message information received by multiple target timing receivers, the target timing receiver is subjected to suppressive interference;

[0014] When the preset interference detection dimension is the position calibration dimension, the interference detection strategy includes that if the position information of other target timing receivers stored in any target timing receiver is updated, the target timing receiver is subject to natural environment interference and / or deceptive interference.

[0015] Optionally, when the preset interference detection dimension is the loop tracking dimension, the interference detection strategy also includes targeting multiple target timing receivers. If it is detected that the ranging codes received by each of the two target timing receivers do not produce a cross-correlation peak, the target timing receivers are subjected to suppressive interference.

[0016] Optionally, each interference detection strategy further corresponds to a detection sensitivity for a detectable interference type, and obtaining an interference detection result of the target timing receiver within a preset interference detection period according to the detected target interference type includes:

[0017] Determining a target interference type detected by the interference detection strategy and a target detection sensitivity of the interference detection strategy for the target interference type;

[0018] According to the target interference type and the target detection sensitivity, an interference detection result of the target timing receiver within a preset interference detection period is obtained.

[0019] Optionally, the detection sensitivity includes core detection and auxiliary detection, and obtaining the interference detection result of the target timing receiver within a preset interference detection period according to the target interference type and the target detection sensitivity includes:

[0020] When multiple interference detection strategies detect that the target timing receiver is interfered with, obtaining the target interference type detected by the target interference detection strategy with the target detection sensitivity as the core detection;

[0021] Based on the target interference type, an interference detection result of the target timing receiver within a preset interference detection period is obtained.

[0022] Optionally, after obtaining the interference detection result of the target timing receiver within a preset interference detection period according to the detected target interference type, the method further includes:

[0023] At every preset time interval, based on the interference detection result and the preset interference detection period corresponding to the interference detection result, interference detection result display content is generated, and the interference detection result display content is displayed on a preset display platform.

[0024] Optionally, the suppression interference includes data layer suppression interference and signal layer suppression interference.

[0025] Optionally, the performing anti-interference reinforcement on the target timing receiver based on the interference detection result includes:

[0026] Based on the preset anti-interference solution corresponding to the target interference type in the interference detection result, the target timing receiver is reinforced against interference.

[0027] By means of the above technical scheme, the present application provides a multi-level receiver reinforcement method for satellite timing to resist interference and deception. For the multiple preset interference detection dimensions corresponding to the timing receiver, the interference detection strategy for each preset interference detection dimension is obtained. The timing receiver performs clock synchronization based on the satellite navigation system. Each preset interference detection dimension corresponds to at least one interference detection strategy. Each interference detection strategy corresponds to a detectable interference type, including natural environment interference, suppression interference and deceptive interference. During the preset interference detection period, the target timing receiver is subjected to interference detection according to each interference detection strategy. When any interference detection strategy is used to detect that the target timing receiver is interfered with, the interference detection result of the target timing receiver within the preset interference detection period is obtained according to the detected target interference type, and the target timing receiver is subjected to interference reinforcement based on the interference detection result. Multi-level interference detection and targeted reinforcement improve the anti-interference performance of the timing receiver.

[0028] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 A schematic flow chart of a multi-level receiver reinforcement method for satellite timing anti-interference and anti-spoofing provided in an embodiment of the present application is shown;

[0031] Figure 2 A flow chart of another multi-level receiver reinforcement method for satellite timing anti-interference and anti-cheating provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0032] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0033] In this embodiment, a multi-level receiver reinforcement method for satellite timing anti-interference and anti-spoofing is provided, such as Figure 1 As shown, the method includes:

[0034] Step 101, for multiple preset interference detection dimensions corresponding to the timing receiver, obtain an interference detection strategy for each preset interference detection dimension, wherein the timing receiver performs clock synchronization based on a satellite navigation system, and each preset interference detection dimension corresponds to at least one interference detection strategy, and each interference detection strategy corresponds to a detectable interference type, and the interference type includes natural environment interference, suppression interference and deceptive interference.

[0035] In the above-mentioned embodiment of the present application, it can be applied to a timing receiver that performs clock synchronization based on a satellite navigation system, and the aforementioned timing receiver can be applied to the synchronization clock of each power system in a substation. Specifically, for the multiple preset interference detection dimensions corresponding to the timing receiver, an interference detection strategy for each preset interference detection dimension is obtained, and each preset interference detection dimension corresponds to at least one interference detection strategy, and each interference detection strategy corresponds to a detectable interference type, and the interference types include natural environment interference, suppression interference, and deceptive interference, in preparation for subsequent interference detection. In particular, the aforementioned interference detection strategy can be pre-set in combination with the existing interference detection algorithm and the timing receiver structure so that a reasonable interference detection architecture can be established.

[0036] Step 102: performing interference detection on the target timing receiver according to each interference detection strategy within a preset interference detection period.

[0037] Step 103, when any interference detection strategy is used to detect that the target timing receiver is interfered with, an interference detection result of the target timing receiver within a preset interference detection period is obtained according to the detected target interference type, and anti-interference reinforcement is performed on the target timing receiver based on the interference detection result.

[0038] Then, within the preset interference detection period, the target timing receiver is subjected to interference detection according to each interference detection strategy. For example, the target timing receiver is subjected to interference detection according to each interference detection strategy in a one-day cycle. When any interference detection strategy is used to detect that the target timing receiver is interfered with, the interference detection result of the target timing receiver within the preset interference detection period is obtained according to the detected target interference type. Based on the interference detection result, the target timing receiver is reinforced against interference, which can be targeted to reinforce the timing receiver against interference and improve the anti-interference performance of the timing receiver.

[0039] By applying the technical solution of this embodiment, for the multiple preset interference detection dimensions corresponding to the timing receiver, the interference detection strategy of each preset interference detection dimension is obtained, the timing receiver performs clock synchronization based on the satellite navigation system, and each preset interference detection dimension corresponds to at least one interference detection strategy, and each interference detection strategy corresponds to a detectable interference type, including natural environment interference, suppression interference and deceptive interference; within the preset interference detection period, the target timing receiver is subjected to interference detection according to each interference detection strategy; when any interference detection strategy is used to detect that the target timing receiver is interfered with, the interference detection result of the target timing receiver within the preset interference detection period is obtained according to the detected target interference type, and the target timing receiver is subjected to anti-interference reinforcement based on the interference detection result. Combined with the implementation structure and processing flow of the timing receiver, multi-level interference detection is performed, and suppression interference and deceptive attacks are comprehensively considered, which can improve the accuracy of interference detection, and then targeted reinforcement is performed, thereby improving the anti-interference performance of the timing receiver.

[0040] Further, as a refinement and extension of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process of this embodiment, another multi-level receiver reinforcement method for satellite timing anti-interference and anti-spoofing is provided, such as Figure 2 As shown, the method includes:

[0041] Step 201, for multiple preset interference detection dimensions corresponding to the timing receiver, obtain the interference detection strategy of each preset interference detection dimension, and within the preset interference detection period, perform interference detection on the target timing receiver according to each interference detection strategy, wherein the timing receiver performs clock synchronization based on the satellite navigation system, various preset interference detection dimensions correspond to at least one interference detection strategy, each interference detection strategy corresponds to a detectable interference type, the interference types include natural environment interference, suppression interference and deceptive interference, each interference detection strategy also corresponds to a detection sensitivity for the detectable interference type, the detection sensitivity includes core detection and auxiliary detection, the suppression interference includes data layer suppression interference and signal layer suppression interference, the target timing receiver includes multiple, multiple target timing receivers respond to the same satellite navigation system, the preset interference detection dimensions include signal dimension, loop tracking dimension, navigation message dimension and position calibration dimension.

[0042] In the above-mentioned embodiment of the present application, for the multiple preset interference detection dimensions corresponding to the timing receiver, an interference detection strategy for each preset interference detection dimension is obtained, and within the preset interference detection period, interference detection is performed on the target timing receiver according to each interference detection strategy. To this end, the accuracy of interference detection can be improved through multi-level interference detection.

[0043] Step 202, when the preset interference detection dimension is the signal dimension, the interference detection strategy includes that if it is detected that the signal power received by the target timing receiver has an increase rate greater than or equal to a preset increase threshold within the preset interference detection period, then the target timing receiver is subjected to suppressive interference and / or deceptive interference.

[0044] Step 203, when the preset interference detection dimension is the loop tracking dimension, the interference detection strategy includes if it is detected that the relative position and / or relative speed between the satellite navigation system and the target timing receiver changes, then the target timing receiver is subject to natural environment interference and / or deceptive interference.

[0045] Step 204, when the preset interference detection dimension is the loop tracking dimension, the interference detection strategy also includes targeting multiple target timing receivers. If it is detected that the ranging codes received by each of the two target timing receivers do not generate a cross-correlation peak, the target timing receivers are subject to suppressive interference.

[0046] Step 205, when the preset interference detection dimension is the navigation message dimension, the interference detection strategy includes if it is detected that there is a difference in the message information received by multiple target timing receivers, then the target timing receiver is subjected to suppressive interference.

[0047] Step 206, when the preset interference detection dimension is the position calibration dimension, the interference detection strategy includes that if the position information of other target timing receivers stored in any target timing receiver is updated, the target timing receiver is subject to natural environment interference and / or deceptive interference.

[0048] Next, the preset interference detection dimensions may include signal dimension, loop tracking dimension, navigation message dimension and position calibration dimension. The interference types include natural environment interference, suppression interference and deception interference. Suppression interference includes data layer suppression interference and signal layer suppression interference.

[0049] Specifically, the relationship between each preset interference detection dimension, the interference detection strategy included in each preset interference detection dimension, and the detection sensitivity (including core detection and auxiliary detection) of each interference detection strategy for the interference type is shown in Table 1:

[0050] Table 1

[0051]

[0052]

[0053] Specifically, when the preset interference detection dimension is the signal dimension, the interference detection strategy may include detecting the signal power of the timing receiver, that is, if the signal power received by the target timing receiver is detected, and the increase rate within the preset interference detection period is greater than or equal to the preset increase threshold, then the target timing receiver is subjected to suppressive interference and / or deceptive interference. Because the power of the deceptive attack is higher than the normal GNSS signal, the increase in the received signal power indicates the presence of a deceptive attack.

[0054] When the preset interference detection dimension is the loop tracking dimension, the interference detection strategy may include correlation verification between timing receivers, relative position information tracking loop between satellites and timing receivers, and multi-timing receiver vector tracking loop, where:

[0055] The correlation verification between timing receivers, that is, for multiple target timing receivers, if it is detected that the ranging codes received by each of the two target timing receivers do not produce a cross-correlation peak, then the target timing receiver is subject to suppressive interference. For example, the correlation of the P(Y) code (ranging code) received by each timing receiver is verified. When the two timing receivers receive the P(Y) code of the same satellite and do not produce a cross-correlation peak, it proves that they are attacked (interfered). In particular, if the two timing receivers are attacked by the same attacker, a cross-correlation peak will still be generated. To this end, it is necessary to transmit the high-speed baseband sampling data to the data network, and then detect whether it comes from the same attacker.

[0056] The relative position information tracking loop between the satellite and the timing receiver, that is, if the relative position and / or relative speed between the satellite navigation system and the target timing receiver is detected to have changed, the target timing receiver is subject to natural environment interference and / or deceptive interference. Specifically, using the known position information of the timing receiver, the projection of the relative position and relative speed between the satellite and the timing receiver in the line of sight (LOS) direction can be calculated to predict the attack situation.

[0057] A multi-timing receiver vector tracking loop, for example, uses the position information of multiple timing receivers for interference detection and is suitable for signals with low signal-to-noise ratio.

[0058] When the preset interference detection dimension is the navigation message dimension, the interference detection strategy includes navigation message cross-check and reverse satellite position detection. Navigation message cross-check means that if it is detected that there are differences in the message information received by multiple target timing receivers, the target timing receiver is subject to suppressive interference. For example, reverse satellite position detection can solve the satellite position by using a set of simultaneous equations of multiple timing receivers because the positions of each timing receiver are fixed and known. If it does not match the navigation data, it means that there is an attack. It is suitable for multiple timing receivers with relatively dispersed positions.

[0059] When the preset interference detection dimension is the position calibration dimension, the interference detection strategy includes that if the position information of other target timing receivers stored in any target timing receiver is updated, the target timing receiver is subject to natural environment interference and / or deceptive interference.

[0060] When the preset interference detection dimension is the position calibration dimension, the interference detection strategy includes solving the timing receiver position detection and solving the timing receiver clock error detection, where:

[0061] Solve the timing receiver position, that is, if the position information of other target timing receivers stored by any target timing receiver is updated, the target timing receiver is interfered by the natural environment and / or deceptive interference. For example, for a single timing receiver, this method is effective against forwarding attacks. Because each timing receiver considered has the position information of other timing receivers, if a timing receiver finds that the position data of other timing receivers is incorrect, it means that it has been attacked (interfered).

[0062] Solving the clock error detection of the timing receiver, for example, solving the clock error and comparing it with the local clock. Deceptive interference and receiving end failure do not occur frequently, so the clock data of the receiving end (timing receiver) can be counted, and the newly solved time value can be examined based on these data characteristics to see whether it is the time value "granted" by the satellite.

[0063] Step 207: When any interference detection strategy is used to detect that the target timing receiver is interfered with, determine the target interference type detected by the interference detection strategy and the target detection sensitivity of the interference detection strategy for the target interference type.

[0064] Step 208, when multiple interference detection strategies detect that the target timing receiver is interfered with, obtain the target interference type detected by the target interference detection strategy with the target detection sensitivity as the core detection, and based on the target interference type, obtain the interference detection result of the target timing receiver within the preset interference detection period, and perform anti-interference reinforcement on the target timing receiver based on the interference detection result.

[0065] Step 209: generating interference detection result display content based on the interference detection result and the preset interference detection period corresponding to the interference detection result at every preset time interval, and displaying the interference detection result display content on a preset display platform.

[0066] Next, when any interference detection strategy is used to detect that the target timing receiver is interfered with, the target interference type detected by the interference detection strategy and the target detection sensitivity of the interference detection strategy for the target interference type are determined. When multiple interference detection strategies detect that the target timing receiver is interfered with, the target interference type detected by the target interference detection strategy with the target detection sensitivity as the core detection is obtained, and based on the target interference type, the interference detection result of the target timing receiver within the preset interference detection period is obtained. To this end, by refining the "detection sensitivity" of each interference detection strategy, the result detected by the interference detection strategy of the core detection is further used as the final interference detection result, which can further improve the detection accuracy. Then, based on the interference detection result, the target timing receiver is reinforced against interference. For example, when it is detected that the target timing receiver is interfered with by the natural environment, the target timing receiver can be replaced to a location with less background "weeds" or noise, or, when it is detected that the target timing receiver receives deceptive interference, the overall "protection system" of the power system where the timing receiver is located can be strengthened. At the same time, interference detection result display content can be generated at preset time intervals based on the interference detection results and the preset interference detection time period corresponding to the interference detection results, and the interference detection result display content can be displayed on a preset display platform, that is, the interference detection results can be displayed on the detection platform in real time, so that personnel can check the status of each timing receiver in the power system in time. When interference is found, timely action can be taken to suppress the interference, thereby improving the safe operation performance of the power system.

[0067] By applying the technical solution of this embodiment, for the multiple preset interference detection dimensions corresponding to the timing receiver, the interference detection strategy of each preset interference detection dimension is obtained, and within the preset interference detection period, the target timing receiver is subjected to interference detection according to each interference detection strategy. When the preset interference detection dimension is the signal dimension, the interference detection strategy includes that if the signal power received by the target timing receiver is detected, the increase rate within the preset interference detection period is greater than or equal to the preset increase threshold, then the target timing receiver is subjected to suppression interference and / or deceptive interference. When the preset interference detection dimension is the loop tracking dimension, the interference detection strategy includes that if the relative position and / or relative speed between the satellite navigation system and the target timing receiver is detected to change, then the target timing receiver is subjected to natural environment interference and / or deceptive interference. When the preset interference detection dimension is the loop tracking dimension, the interference detection strategy also includes that for multiple target timing receivers, if it is detected that the ranging codes received by each of the two target timing receivers do not generate a cross-correlation peak, then the target timing receiver is subjected to suppression interference. When the preset interference detection dimension is the navigation message dimension, the interference detection strategy includes that if it is detected that there are differences in the message information received by each of the multiple target timing receivers, the target timing receiver is subject to suppression interference. When the preset interference detection dimension is the position calibration dimension, the interference detection strategy includes that if the position information of other target timing receivers stored by any target timing receiver is updated, the target timing receiver is subject to natural environment interference and / or deceptive interference. When any interference detection strategy is used to detect that the target timing receiver is interfered with, the target interference type detected by the interference detection strategy and the target detection sensitivity of the interference detection strategy for the target interference type are determined. When multiple interference detection strategies detect that the target timing receiver is interfered with, the target interference type detected by the target interference detection strategy with the target detection sensitivity as the core detection is obtained, and based on the target interference type, the interference detection result of the target timing receiver in the preset interference detection period is obtained, and the target timing receiver is reinforced against interference based on the interference detection result. At every preset time interval, based on the interference detection result and the preset interference detection period corresponding to the interference detection result, the interference detection result display content is generated, and the interference detection result display content is displayed on the preset display platform. Multi-level interference detection and targeted reinforcement improve the anti-interference performance of the timing receiver.

[0068] Through the description of the above implementation methods, the technical personnel in this field can clearly understand that the present application can be implemented by means of software plus the necessary general hardware platform, or by hardware to implement a variety of preset interference detection dimensions corresponding to the timing receiver, obtain the interference detection strategy for each preset interference detection dimension, the timing receiver performs clock synchronization based on the satellite navigation system, and each preset interference detection dimension corresponds to at least one interference detection strategy, each interference detection strategy corresponds to a detectable interference type, and the interference type includes natural environment interference, suppression interference and deceptive interference; within the preset interference detection period, the target timing receiver is subjected to interference detection according to each interference detection strategy; when any interference detection strategy is used to detect that the target timing receiver is interfered with, the interference detection result of the target timing receiver within the preset interference detection period is obtained according to the detected target interference type. Multi-level interference detection and reinforcement improve the anti-interference performance of the timing receiver.

[0069] Those skilled in the art will appreciate that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario can be distributed in the devices of the implementation scenario according to the description of the implementation scenario, or can be changed accordingly and located in one or more devices different from the present implementation scenario. The modules of the above-mentioned implementation scenario can be combined into one module, or can be further split into multiple submodules.

[0070] The above serial numbers of this application are only for description and do not represent the advantages and disadvantages of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of this application, but this application is not limited to them, and any changes that can be thought of by technicians in this field should fall within the scope of protection of this application.

Claims

1. A multi-level receiver reinforcement method for satellite timing anti-interference and anti-deception, characterized in that: The method comprises: For multiple preset interference detection dimensions corresponding to the timing receiver, an interference detection strategy for each preset interference detection dimension is obtained, wherein the timing receiver performs clock synchronization based on a satellite navigation system, each preset interference detection dimension corresponds to at least one interference detection strategy, each interference detection strategy corresponds to a detectable interference type, and the interference type includes natural environment interference, suppression interference and deceptive interference; During the preset interference detection period, interference detection is performed on the target timing receiver according to each interference detection strategy; When any interference detection strategy is used to detect that the target timing receiver is interfered with, the interference detection result of the target timing receiver within a preset interference detection period is obtained according to the detected target interference type, and the target timing receiver is reinforced against interference based on the interference detection result.

2. The method according to claim 1, characterized in that: The target timing receiver includes a plurality of target timing receivers, the plurality of target timing receivers respond to the same satellite navigation system, the preset interference detection dimension includes a signal dimension, a loop tracking dimension, a navigation message dimension, and a position calibration dimension, and the interference detection is performed on the target timing receiver according to each interference detection strategy, including: When the preset interference detection dimension is the signal dimension, the interference detection strategy includes that if it is detected that the signal power received by the target timing receiver has an increase rate greater than or equal to a preset increase threshold within the preset interference detection period, the target timing receiver is subjected to suppressive interference and / or deceptive interference; When the preset interference detection dimension is the loop tracking dimension, the interference detection strategy includes that if it is detected that the relative position and / or relative speed between the satellite navigation system and the target timing receiver changes, the target timing receiver is subject to natural environment interference and / or deceptive interference; When the preset interference detection dimension is the navigation message dimension, the interference detection strategy includes: if it is detected that there are differences in the message information received by multiple target timing receivers, the target timing receiver is subjected to suppressive interference; When the preset interference detection dimension is the position calibration dimension, the interference detection strategy includes that if the position information of other target timing receivers stored in any target timing receiver is updated, the target timing receiver is subject to natural environment interference and / or deceptive interference.

3. The method according to claim 2, characterized in that When the preset interference detection dimension is the loop tracking dimension, the interference detection strategy also includes targeting multiple target timing receivers. If it is detected that the ranging codes received by each of the two target timing receivers do not produce a cross-correlation peak, the target timing receivers are subject to suppressive interference.

4. The method according to claim 1, characterized in that: Each interference detection strategy also corresponds to a detection sensitivity for a detectable interference type, and obtaining an interference detection result of the target timing receiver within a preset interference detection period according to the detected target interference type includes: Determining a target interference type detected by the interference detection strategy and a target detection sensitivity of the interference detection strategy for the target interference type; According to the target interference type and the target detection sensitivity, an interference detection result of the target timing receiver within a preset interference detection period is obtained.

5. The method according to claim 4, characterized in that The detection sensitivity includes core detection and auxiliary detection, and obtaining the interference detection result of the target timing receiver within a preset interference detection period according to the target interference type and the target detection sensitivity includes: When multiple interference detection strategies detect that the target timing receiver is interfered with, obtaining the target interference type detected by the target interference detection strategy with the target detection sensitivity as the core detection; Based on the target interference type, an interference detection result of the target timing receiver within a preset interference detection period is obtained.

6. The method according to any one of claims 1 to 5, characterized in that After obtaining the interference detection result of the target timing receiver within a preset interference detection period according to the detected target interference type, the method further includes: At every preset time interval, based on the interference detection result and the preset interference detection period corresponding to the interference detection result, interference detection result display content is generated, and the interference detection result display content is displayed on a preset display platform.

7. The method according to claim 6, characterized in that The suppression interference includes data layer suppression interference and signal layer suppression interference.

8. The method according to claim 1, characterized in that The anti-interference reinforcement of the target timing receiver based on the interference detection result includes: Based on the preset anti-interference solution corresponding to the target interference type in the interference detection result, the target timing receiver is reinforced against interference.

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