Identification method and device, network / electronic equipment, storage medium and program product

Abstract

The invention relates to the technical field of wireless communication, and provides an identification method and device, a network / electronic device, a storage medium and a program product. The method comprises the following steps: acquiring identity information of a second network device which interferes with a first network device in response to a target which is identified to be suspected as a false alarm; sending a modulation request to network management equipment; the modulation request carries identity information; the modulation request is used for triggering the network management equipment to send a modulation instruction to the second network equipment, and the modulation instruction is used for triggering the second network equipment to modulate a frequency modulation rate for transmitting the linear frequency modulation pulse signal from a first frequency modulation rate to a second frequency modulation rate in at least one processing period; the first frequency modulation rate is different from the second frequency modulation rate; judging whether a correlation peak in a distance threshold corresponding to the target in at least one processing period is weakened or not; and in response to weakening of the correlation peak in the distance threshold corresponding to the target in the at least one processing period, determining that the target is a false alarm. The false alarm identification method provided by the invention can effectively identify false alarms.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to an identification method, apparatus, network / electronic device, storage medium, and program product. Background Technology

[0002] Currently, wireless communication base stations (such as 5G-A base stations) can utilize linear frequency modulated (LFM) pulse signals to achieve long-range target sensing, outputting information on the distance, angle, and velocity of the sensed target, thus extending the base station's communication capabilities to sensing capabilities. In a networked environment, echo signals generated by LFM pulse signals emitted by other base stations and reflected by the target may interfere with the base station, increasing false alarms in the detection results. A false alarm indicates that the detected target may not be the actual, real target. For example, due to interference from other base stations, the base station may misidentify the same target as a companion target. Therefore, it is necessary to identify potential false alarms. Summary of the Invention

[0003] This application provides a false alarm identification method to solve the technical problem of increased false alarms caused by mutual interference between base stations.

[0004] In a first aspect, embodiments of this application provide a false alarm identification method, comprising: in response to identifying a target suspected of being a false alarm, acquiring the identity information of a second network device that interferes with a first network device; the second network device and the first network device respectively transmit linear frequency modulated pulse signals with the same modulation frequency and both being a first modulation frequency; sending a modulation request to a network management device; the modulation request carrying the identity information; the modulation request being used to trigger the network management device to send a modulation instruction to the second network device, the modulation instruction being used to trigger the second network device to modulate the modulation frequency of the transmitted linear frequency modulated pulse signal from the first modulation frequency to the second modulation frequency within at least one processing cycle; the first modulation frequency and the second modulation frequency being different; in response to receiving configuration result information forwarded by the network management device indicating that the modulation frequency corresponding to the second network device has been modulated, determining whether the correlation peak within the distance threshold corresponding to the target has weakened within at least one processing cycle; the correlation peak is obtained by matching and filtering the linear frequency modulated pulse signal transmitted by the first network device and the echo signal corresponding to the target received; in response to the weakening of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle, determining that the target is a false alarm.

[0005] In one embodiment, the second modulation frequency is opposite in sign to the first modulation frequency and has the same absolute value; determining whether the correlation peak within the distance threshold corresponding to the target weakens within at least one processing cycle includes: determining whether the correlation peak within the distance threshold corresponding to the target disappears within at least one processing cycle; determining the target as a false alarm in response to the weakening of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle includes: determining the target as a false alarm in response to the disappearance of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle.

[0006] In one embodiment, before obtaining the identity information of the second network device that interferes with the first network device in response to identifying the target that generates a false alarm, the method further includes: detecting the first target and the second target based on the transmitted linear frequency modulated pulse signal; in response to the first target and the second target having different radial distances but the same angle, identifying the first target or the second target as a false alarm based on the coordinate information of the first network device and the second network device in a specified coordinate system and the radial distances corresponding to the first target and the second target, respectively.

[0007] In one embodiment, identifying a false alarm for a first target or a second target based on the coordinate information of the first network device and the second network device in a specified coordinate system, and the radial distances corresponding to the first target and the second target, includes: acquiring the longitude, latitude, and altitude information of the second network device that interferes with the first network device; converting the longitude, latitude, and altitude information into second coordinates in a specified coordinate system; calculating a first distance from the second network device to the first target based on the second coordinates and a third coordinate of the first target; averaging the first radial distance and the first distance corresponding to the first target as the first target distance; the first target distance is the linear frequency modulated pulse signal transmitted by the second network device. The distance traveled by the signal reflected from the first target to the first network device; if the difference between the second radial distance corresponding to the second target and the distance of the first target is within a preset error range, the second target is identified as a false alarm; or, based on the second coordinate and the fourth coordinate of the second target, the second distance between the second network device and the second target is calculated; the average of the second radial distance and the second distance corresponding to the second target is taken as the second target distance; the second target distance is the distance traveled by the linear frequency modulated pulse signal emitted by the second network device reflected from the second target to the first network device; if the difference between the first radial distance corresponding to the first target and the distance of the second target is within a preset error range, the first target is identified as a false alarm.

[0008] In one embodiment, after determining that the target is a false alarm, the method further includes: sending a verification completion message to the network management device; the verification completion message is used to trigger the second network device to restore the modulation frequency of the linear frequency modulated pulse signal from the second modulation frequency to the first modulation frequency.

[0009] Secondly, embodiments of this application provide a false alarm identification method, which is applied to a network management device. The method includes: in response to receiving a modulation request sent by a first network device, sending a modulation instruction to a second network device corresponding to the identity information according to the identity information carried in the modulation request; wherein, the modulation instruction is used to trigger the second network device to modulate the modulation frequency of the transmitted linear frequency modulated pulse signal from a first modulation frequency to a second modulation frequency within at least one processing cycle; the first modulation frequency and the second modulation frequency are different.

[0010] In one embodiment, the modulation request further carries the modulation frequency information of the linear frequency modulated pulse signal transmitted by the first network device; according to the identity information carried in the modulation request, a modulation instruction is sent to the second network device corresponding to the identity information, including: querying the modulation frequency of the linear frequency modulated pulse signal transmitted by the second network device corresponding to the identity information according to the identity information carried in the modulation request; and in response to the fact that the modulation frequency of the linear frequency modulated pulse signal transmitted by the second network device is the same as the modulation frequency of the linear frequency modulated pulse signal transmitted by the first network device, sending a modulation instruction to the second network device corresponding to the identity information.

[0011] Thirdly, embodiments of this application provide a false alarm identification method, which is applied to a second network device. The method includes: in response to receiving a modulation command sent by a network management device, modulating the modulation frequency of the transmitted linear frequency modulated pulse signal from a first modulation frequency to a second modulation frequency within at least one processing cycle; the first modulation frequency and the second modulation frequency are different; sending configuration result information to the network management device to trigger the network management device to forward the configuration result information to the first network device; the configuration result information is used to indicate whether the modulation frequency corresponding to the second network device has been modulated.

[0012] Fourthly, embodiments of this application provide a false alarm identification device, comprising: an acquisition module, configured to acquire, in response to identifying a target suspected of being a false alarm, the identity information of a second network device that interferes with a first network device; the modulation frequencies of the linear frequency modulated pulse signals emitted by the second network device and the first network device are the same and are both first modulation frequencies; a modulation request module, configured to send a modulation request to a network management device; the modulation request carries identity information; the modulation request is used to request that the modulation frequency of the linear frequency modulated pulse signal emitted by the second network device be changed from the first modulation frequency to the second modulation frequency within at least one processing cycle; the first modulation frequency and the second modulation frequency are different; a discrimination module, configured to, in response to receiving configuration result information forwarded by the network management device indicating that the modulation frequency corresponding to the second network device has been modulated, determine whether the correlation peak within the distance threshold corresponding to the target weakens within at least one processing cycle; the correlation peak is obtained by matching and filtering the linear frequency modulated pulse signal emitted by the first network device and the received echo signal corresponding to the target; and a determination module, configured to determine that the target is a false alarm in response to the weakening of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle.

[0013] Fifthly, embodiments of this application provide a network device, including a memory, a transceiver, and a processor; the memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: In response to the identification of a target suspected to be a false alarm, the system acquires the identity information of a second network device that is interfering with the first network device; the second network device and the first network device transmit linear frequency modulated pulse signals with the same modulation frequency, both being the first modulation frequency; a modulation request is sent to the network management device; the modulation request carries the identity information; the modulation request is used to trigger the network management device to send a modulation command to the second network device, the modulation command is used to trigger the second network device to modulate the modulation frequency of the transmitted linear frequency modulated pulse signal from the first modulation frequency to the second modulation frequency within at least one processing cycle; the first modulation frequency and the second modulation frequency are different; in response to receiving configuration result information forwarded by the network management device indicating that the modulation frequency corresponding to the second network device has been modulated, the system determines whether the correlation peak within the distance threshold corresponding to the target has weakened within at least one processing cycle; the correlation peak is obtained by matched filtering of the linear frequency modulated pulse signal transmitted by the first network device and the received echo signal corresponding to the target; in response to the weakening of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle, the system determines that the target is a false alarm.

[0014] In a sixth aspect, embodiments of this application provide an electronic device, including a processor and a memory storing a computer program, wherein the processor executes the program to implement the steps of the false alarm identification method described in the first, second, or third aspect.

[0015] In a seventh aspect, embodiments of this application provide a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the false alarm identification method described in the first, second, or third aspect.

[0016] Eighthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the steps of the false alarm identification method described in the first, second, or third aspects.

[0017] The identification method, apparatus, network / electronic device, storage medium, and program product provided in this application, after initially determining that a target is suspected to be a false alarm, a first network device sends a modulation request to a network management system. This allows the network management system to send a modulation command to a corresponding second network device based on the identity information carried in the modulation request. The modulation command triggers the second network device to modulate the frequency of its transmitted linear frequency modulated pulse signal from a first frequency to a second frequency within at least one processing cycle. The first frequency and the second frequency are different. Based on whether the correlation peak within the distance threshold corresponding to the suspected false alarm target weakens before and after modulation, it can be determined whether the target is a false alarm. This method, by modulating the frequency of the interfering base station, further assists in determining whether a target is a false alarm by observing changes in the correlation peak, based on the initial determination of a target suspected to be a false alarm. It can effectively identify false alarms from multiple detected targets, improving the accuracy of target detection based on linear frequency modulated pulse signals. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram showing that the transmitted signal and the received signal have the same modulation slope in some embodiments of the false alarm identification method provided in this application; Figure 2 This is a schematic diagram of the time-division frequency group network structure in some embodiments of the false alarm identification method provided in this application; Figure 3 This is a schematic diagram of a time-division packet network structure in some embodiments of the false alarm identification method provided in this application, in which base station B is the interfering station of base station A; Figure 4 This is a schematic diagram of the three-party interaction process of the false alarm identification method provided in the embodiments of this application; Figure 5 This is a flowchart illustrating the false alarm identification method (first network device side) provided in the embodiments of this application; Figure 6 This is a flowchart illustrating the false alarm identification method (second network device side) provided in the embodiments of this application; Figure 7 This is a schematic diagram illustrating how base station A and base station B simultaneously detect a target in some embodiments of the false alarm identification method provided in this application. Figure 8This is a waveform diagram showing the disappearance of the correlation peak and the increase of the background noise after slope modulation of the scrambling station in some embodiments of the false alarm identification method provided in this application. Figure 9 This is a schematic diagram showing that in some embodiments of the false alarm identification method provided in this application, the slope of the interfering station (i.e., the interfering station) is opposite in sign to the slope of the base station and the absolute value is equal. Figure 10 These are schematic diagrams illustrating simulation results obtained by simulating real-world application scenarios in some embodiments of the false alarm identification method provided in this application. Figure 11a This is a schematic diagram of the waveform before slope modulation during simulation testing in some embodiments of the false alarm identification method provided in this application. Figure 11b This is a schematic diagram of the waveform after slope modulation during simulation testing in some embodiments of the false alarm identification method provided in this application. Figure 12 This is a schematic diagram of the structure of the first network device or the second network device provided in the embodiments of this application; Figure 13 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] 5G-A communication base stations utilize two time slots in the communication frame structure to achieve low-altitude target sensing, outputting information on the distance, angle, and velocity of the sensed target, thus extending the base station's communication capabilities to sensing capabilities. Specifically, 5G-A base stations can use linear frequency modulated pulse signals to achieve long-range target sensing by transmitting pulse waves with a fixed modulation slope and receiving the reflected echo signals, for example... Figure 1 As shown, the modulation slope of the transmitted signal is the same as that of the received signal. Then, steps such as matched filtering are performed on the echo signal and the transmitted signal to maximize the echo signal-to-noise ratio. Finally, constant false alarm rate (CFAR) detection is used to obtain information such as the target distance, angle, and velocity within the current sensing range.

[0022] For a radar cross-section (RCS) of 0.01m 2With a small drone and a 20% resource utilization rate, the base station detection range can reach 1.4km.

[0023] In a networked environment, signals emitted by different base stations may interfere with each other, causing problems such as increased base station noise floor and more false alarms. To avoid inter-station interference, one technique used in related technologies is time-division frequency-division interference suppression, for example... Figure 2 As shown, Figure 2 This is an example of a time-division frequency grouping network diagram, where F0, F1, F2, F3, and F4 represent five frequency bands from F0 to F4, and t0, t1, and t2 represent different time slots. The total physical bandwidth of the base station is 100 MHz, and with a single station having a usable bandwidth of 20 MHz, it has five frequency division degrees of freedom. Figure 2 The point where the three arrows intersect, or the starting point of the three arrows, represents a base station. Each base station is considered a node. The first-order neighboring nodes around each node can be of different frequencies, but each node may have the same frequency with its second-order neighboring nodes. That is, there will be base stations with the same frequency in two adjacent circles. In addition, the linear frequency modulated pulse waves in the current network all use the same modulation waveform, which leads to signal interference between different base stations with the same frequency.

[0024] Specifically, in a time-division frequency (TDF) packet network architecture, due to limitations in degrees of freedom, there are co-frequency sensing stations in adjacent rings. Interference between co-frequency stations is divided into direct wave interference and target reflection interference (where one station transmits and the other receives). Reflection interference is usually caused by lateral reflection from moving targets. Signals transmitted by neighboring stations reach the receiving end of this base station after reflection from the target. Because the modulation parameters of the transmitted and received signals are the same, a correlation peak is formed after matched filtering, thus causing false alarms. The characteristics of false alarm targets are not significantly different from those of real targets, and their trajectories are similar; this is called a "flying false alarm," and the base station cannot use target identification methods to make a high-confidence judgment on flying false alarms.

[0025] For example, such as Figure 3 As shown, the transmission timing, transmission frequency, and modulation parameters of signals from station A (base station A) and station B (base station B) are completely identical, and there is a partial overlap in coverage area between the two stations. If a target exists within the overlapping coverage area, both base stations can receive not only the self-transmitted and self-received echo from the target, but also the echo of the signal transmitted by the other station that is laterally reflected from the target and reaches their respective base stations. For base station A, the self-transmitted and self-received echo returns to base station A after being reflected from the target, while the echo transmitted by the other station and received by the other station is transmitted by base station B and reaches base station A after being laterally reflected from the target. The time delays of the two echoes are inconsistent, resulting in two different detection points and causing false alarms during homing.

[0026] To address the false alarm problem caused by the echo transmitted from one station to another in a sensing network, especially the false alarm caused by a companion signal, this application proposes a companion false alarm verification scheme. This scheme reduces the correlation between the echo transmitted from one station to another and the transmitted signal of the local station by dynamically configuring the modulation slope of the neighboring station's signal, thereby assisting the base station in identifying the false alarm caused by the companion signal.

[0027] Figure 4 This is one of the flowcharts illustrating the false alarm identification method provided in this application. (Refer to...) Figure 4 This application provides a false alarm identification method, which may include: Step 101: In response to identifying a target suspected to be a false alarm, the first network device obtains the identity information of the second network device that is interfering with the first network device.

[0028] The first network device and / or the second network device can be a base station. For example, the first network device can be... Figure 3 The base station A shown in the diagram, the second network device can be Figure 3 Base station B is shown in the image.

[0029] In some embodiments, identifying a target suspected of being a false alarm can be achieved in the following ways: After transmitting a linear frequency modulated pulse signal, base station A receives two echo signals with the same frequency as the linear frequency modulated pulse signal. Based on the two echo signals, two detection results are obtained, namely the first target T1 and the second target T2, with detection results of (R1, α1) and (R2, α2) respectively. R1 represents the radial distance corresponding to the first target T1, α1 represents the angle of the first target T1 relative to base station A, R2 represents the radial distance corresponding to the second target T2, and α2 represents the angle of the second target T2 relative to base station A.

[0030] In response to the fact that the radial distances corresponding to the first target T1 and the second target T2 are different but the angles are the same (e.g., R1≠R2 and α1=α2), the first target or the second target is identified as a false alarm based on the coordinate information of base station A (first network device) and base station B (second network device) in a specified coordinate system and the radial distances corresponding to the first target and the second target, respectively. For example, the specified coordinate system can be the East-North-Up (ENU) coordinate system, also known as the Northeast-East coordinate system or the station-center coordinate system.

[0031] It should be noted that the linear frequency modulation pulse signals transmitted by the second network device and the first network device have the same modulation frequency and are both the first modulation frequency. For example, base station A and base station B are co-frequency base stations and both have the first modulation frequency.

[0032] Frequency modulation, also known as modulation slope or simply slope.

[0033] Step 102: The first network device sends a modulation request to the network management device.

[0034] The modulation request carries identity information; the modulation request is used to trigger the network management device to send a modulation instruction to the second network device, and the modulation instruction is used to trigger the second network device to modulate the frequency of the transmitted linear frequency modulated pulse signal from the first frequency to the second frequency within at least one processing cycle; the first frequency and the second frequency are different.

[0035] Network management equipment, also known as a network management system, is a system used to monitor, control, and maintain the operational status of base station equipment and networks.

[0036] Step 103: In response to receiving the modulation request sent by the first network device, the network management device sends a modulation instruction to the second network device corresponding to the identity information carried in the modulation request.

[0037] In some embodiments, the network management device may trigger the sending of a modulation command to the second network device immediately upon receiving a modulation request, without needing to perform additional discrimination conditions. In other embodiments, after receiving a modulation request, the network management device may query the modulation frequency of the linear frequency modulated (LFM) pulse signal transmitted by the second network device corresponding to the identity information carried in the modulation request. If the modulation frequency of the LFM pulse signal transmitted by the second network device is the same as that transmitted by the first network device, a modulation command is sent to the second network device corresponding to the identity information. That is, the network management device may perform an additional discrimination operation: if the second network device in the modulation request is at the same frequency as the first network device, the modulation process continues; otherwise, if the second network device is not at the same frequency as the first network device, there is no need to modulate the second network device. This can improve the reliability of the modulation operation and reduce performance degradation caused by unreasonable modulation due to incorrect identity information carried in the modulation request.

[0038] Step 104: In response to receiving the modulation command sent by the network management device, the second network device modulates the frequency of the transmitted linear frequency modulated pulse signal from the first frequency modulation to the second frequency modulation within at least one processing cycle.

[0039] The first modulation frequency and the second modulation frequency are different frequencies. The correlation peak generated between the echo signal and the transmitted signal after matched filtering at different frequencies is weaker than the correlation peak generated between the echo signal and the transmitted signal after matched filtering at the same frequency. The second modulation frequency can be set to a frequency value that can produce a significant reduction phenomenon. In some embodiments, the second modulation frequency can be configured to be a frequency that is opposite in sign to the first modulation frequency and equal in magnitude.

[0040] Step 105: The second network device sends configuration result information to the network management device to trigger the network management device to forward the configuration result information to the first network device.

[0041] The configuration result information is used to indicate whether the frequency corresponding to the second network device has been modulated.

[0042] Step 106: In response to receiving the configuration result information sent by the second network device to the network management device, the network management device forwards the configuration result information to the first network device.

[0043] Step 107: In response to receiving configuration result information forwarded by the network management device indicating that the frequency modulation of the second network device has been modulated, the first network device determines whether the correlation peak within the distance threshold corresponding to the target has weakened within at least one processing cycle.

[0044] The correlation peak is obtained by matching and filtering the linear frequency modulated pulse signal transmitted by the first network device with the echo signal corresponding to the suspected false alarm target. After the base station transmits the linear frequency modulated pulse signal, it may receive multiple echo signals. Multiple echo signals and the transmitted signal may generate multiple correlation peaks after matching and filtering. The correlation peak in step 107 refers to the correlation peak corresponding to the suspected false alarm target.

[0045] Whether the correlation peak is weakened, that is, whether the difference between the amplitude of the second correlation peak generated between the received echo signal and the transmitted signal after modulation and the amplitude of the first correlation peak generated between the received echo signal and the transmitted signal before modulation meets the preset conditions, such as whether the difference between the two amplitudes exceeds the preset threshold. If it exceeds the threshold, it is considered weakened; if it does not exceed the threshold, it is considered not weakened.

[0046] In some embodiments, when the second modulation frequency is opposite in sign to the first modulation frequency and equal in magnitude, the correlation peak can disappear, that is, the attenuation is the greatest. For example, the correlation peak generated by the echo signal of the linear frequency modulated pulse signal transmitted by the modulated base station B after being reflected by the second target T2 (assuming the second target is a suspected target of false alarm) to the base station A and the linear frequency modulated pulse signal previously transmitted by the base station A after being matched and filtered disappears.

[0047] Step 108: In response to the weakening of the correlation peak within the distance threshold corresponding to the target in at least one processing cycle, the target is determined to be a false alarm.

[0048] In some embodiments, if the correlation peak disappears when the second modulation frequency is opposite in sign to the first modulation frequency and equal in magnitude, the corresponding target is determined to be a false alarm. In other embodiments, the correlation peak weakens when the difference between the amplitudes of the first and second correlation peaks exceeds a preset threshold.

[0049] Optionally, after step 108, the first network device sends a verification completion message to the network management device. This verification completion message triggers the second network device to restore the modulation frequency of the linear frequency modulated pulse signal from the second modulation frequency to the first modulation frequency. Specifically, in response to receiving the verification completion message, the network management device sends a modulation parameter recovery command to the second network device. Upon receiving this command, the second network device modulates the modulation frequency from the second frequency to the first frequency, thus restoring it to the original modulation frequency.

[0050] according to Figure 4 As shown in the process, from the perspective of the first network device, the false alarm identification method may include, for example: Figure 5 The steps shown are as follows: Step 501: In response to identifying a target suspected to be a false alarm, obtain the identity information of the second network device that is interfering with the first network device.

[0051] Step 502: Send a modulation request to the network management device.

[0052] Step 503: In response to receiving configuration result information forwarded by the network management device indicating that the frequency modulation of the second network device has been modulated, determine whether the correlation peak within the distance threshold corresponding to the target has weakened within at least one processing cycle.

[0053] Step 504: In response to the weakening of the correlation peak within the distance threshold corresponding to the target in at least one processing cycle, the target is determined to be a false alarm.

[0054] according to Figure 4 The process shown, from the perspective of network management equipment, the false alarm identification method can include the following steps: In response to receiving a modulation request from a first network device, a modulation instruction is sent to a second network device corresponding to the identity information carried in the modulation request.

[0055] according to Figure 4 As shown in the process, from the perspective of the second network device, the false alarm identification method may include, for example: Figure 6 The steps shown are as follows: Step 601: In response to receiving a modulation command from the network management device, the modulation frequency of the transmitted linear frequency modulated pulse signal is modulated from the first modulation frequency to the second modulation frequency within at least one processing cycle.

[0056] Step 602: Send configuration result information to the network management device to trigger the network management device to forward the configuration result information to the first network device.

[0057] This application proposes a method for verifying false alarms of co-channel interference base stations based on dynamic slope code division. It uses the perceived target information and the location information of the co-channel interference base station to judge suspected false alarms of co-channel interference. For suspected false alarms of co-channel interference, it requests slope configuration of the interference base station to assist in the verification of false alarms of the local station. If the correlation peak is significantly reduced after slope configuration or if the correlation peak disappears after reverse slope configuration, the false alarm of co-channel interference can be confirmed, thus achieving effective elimination of false alarms of co-channel interference.

[0058] The following examples, using real-world application scenarios, provide a detailed explanation of the false alarm identification method proposed in this application.

[0059] In such Figure 3 or Figure 7 In the target detection scenario shown, base station A and base station B are on the same frequency and adjacent, meaning they are second-order neighbors of each other. In a false alarm scenario involving a sender-receiver, as... Figure 7 As shown, the linear frequency modulated pulse signal transmitted by base station A is reflected back from the target and reaches the receiving end of station A. The calculated radial distance is R. A Angle α A The pulse signal transmitted by base station B is reflected back from the target and reaches the receiving end of base station B. The calculated radial distance is R. B Angle α B In addition, some electromagnetic signals from base stations A and B will also reach base stations B and A via target reflection. Base station A calculates the target distance by resolving the transmitted and received signals (R). A +R B ) / 2, with an angle of α A Bilibili calculates the target distance (R) obtained from the echo received by the other party. A +R B ) / 2, with an angle of α B .

[0060] The above analysis shows that the suspected false alarms (hereinafter referred to as false alarms) and the real target have the following relationship: for any base station, the false alarm and the real target have the same angle but different radial distances; for any base station, the measured distance of the false alarm is related to the real target and the sum of the distances from the target to the two base stations. Therefore, suspected false alarms can be identified based on the distance and angle information of the perceived target, combined with the base station location information.

[0061] Suppose that base station A detects targets T1 and T2, and the detection results are respectively ( R 1 ,α 1) and ( R 2 ,α 2) When the radial distances of two targets are different, but their angles are the same, that is... R 1≠ R 2, α 1=α At 2 o'clock, it is considered that there may be a false alarm during flight accompaniment, and the following false alarm accompaniment judgment procedure is initiated: Base station A requests the latitude, longitude, and altitude of other base stations operating on the same frequency from the network management system (i.e., the network management device, hereinafter referred to as the network management system). Upon receiving this request, the network management system queries the network for base stations operating on the same frequency as base station A. These outermost base stations are those located at the second-order neighboring nodes adjacent to base station A, not the first-order neighboring nodes. For example, combining... Figure 2 and Figure 7 In time slot t0, base station A and base station B transmit linear frequency modulated pulse signals using the same frequency F0. Base station B is an outer ring base station of base station A and operates at the same frequency. The latitude, longitude, and altitude information of base station B is sent to the requesting station (base station A). The requesting station stores the received latitude, longitude, and altitude information of the neighboring station (base station B) locally. The latitude, longitude, and altitude of base station B are converted to coordinates in the North-East coordinate system. For example, assuming the coordinates of base station A are (… x A ,y A ,z A The coordinates of the outer ring base station B after conversion are ( ). x B ,y B ,z B ).

[0062] Assume that the coordinates of two targets T1 and T2 detected by base station A are respectively ( x 1 ,y 1 ,z 1) and ( x 2 ,y 2 ,z 2) If T1 is the real target, then the transmission path is from base station B to target T1 and then to base station A. Based on the coordinates, the distance between target T1 and base station B is calculated according to the following formula (1): (1) The target distance (first target distance) for sending and receiving should be: Compare the radial distances corresponding to target T2. R 2. Distance from the first target, if Therefore, it is initially determined that target T2 is a false alarm during escort operations. ε This represents the measurement error of the base station.

[0063] If T2 is the real target, then the path from station B to target T2 and then to station A is calculated using the coordinates as follows (2): (2) Then the distance between the target and the receiver should be: ,like Therefore, it is initially determined that target T1 is a false alarm during escort.

[0064] Thus, based on the above exemplary description, targets suspected of being false alarms during flight escort have been preliminarily identified. To improve the accuracy and reliability of false alarm identification, this application further proposes reducing signal interference under network conditions through frequency modulation. Specifically, pulse wave code division can be used to reduce interference from neighboring station correlation peaks under network conditions, and the existence of false alarms can be determined by the changes in correlation peaks before and after modulation.

[0065] The base station uses a linear frequency modulated (LFM) pulse signal to detect long-range targets. The expression for the LFM signal is: (3) in, T p For signal pulse width, To adjust the frequency, B This refers to the signal bandwidth.

[0066] Currently, all base stations have identical signal parameter configurations and modulation frequencies. Matching filtering of the echo signal reflected from the target with the base station's own transmitted signal maximizes the echo signal-to-noise ratio and yields a high correlation peak. If the modulation slopes of the two pulse signals are different, the correlation peak will decrease after matching filtering. The lowest correlation occurs when the modulation frequencies of the echo signal and the transmitted signal are opposite (i.e., positive and negative slopes), and the correlation peak disappears after matching filtering. Figure 8 As shown, the red waveform represents the waveform obtained after matched filtering when the modulation frequencies of the echo signal and the transmitted signal are opposite to each other. The opposite slopes mean that the linear frequency modulated pulse signal transmitted by base station A uses the first modulation frequency, while the received echo signal uses the second modulation frequency. When the first modulation frequency (first slope) is positive, the second modulation frequency (second slope) is negative, and their absolute values ​​are the same. For example, as... Figure 9 As shown, the slope of the interfering station is opposite to the modulation slope of the transmitted signal. The interfering station is a base station that operates on the same frequency as this base station and is located on the outer ring.

[0067] In a network environment, if other base stations within the detection range (e.g., 1.4km) use the same modulation parameters as this base station, their transmitted signals will be reflected by the target and reach this base station, forming a high correlation peak. The peak value exceeds the CFAR detection threshold, generating a false alarm for the accompanying flight. The disappearance characteristic of the inverse slope correlation peak can be used to distinguish the false alarm for the accompanying flight of the other transmitting and receiving.

[0068] It should be noted that because the positive and negative slope signals are not orthogonal, the reverse slope signal can also cause noise interference to the positive slope station. Especially when the interference power exceeds the base station's basic clutter level, it can adversely affect the base station's detection performance. Figure 8 As shown, code division interference signals cause a local increase in noise floor between 200m and 800m. To avoid interference from other base stations transmitting and receiving signals, and to mitigate the performance degradation caused by the increased code division noise floor, it is necessary to dynamically adjust the code division configuration in conjunction with a time-division frequency group network, using transient code division to assist in false alarm verification. The time period for a base station to perform a target detection is less than 1 second. For a false alarm verification, the reverse slope configuration time does not exceed 1 second. Although the reverse slope configuration may introduce noise interference to neighboring stations, causing a decrease in detection capability in some distance segments, since the current base station trajectory points are all output after filtering algorithms, short-term missed detections or accuracy degradation do not affect the overall detection performance of the base station, making it feasible to a certain extent.

[0069] Specifically, assume that the powers of the two targets T1 and T2 detected by base station A are P1 and P2, and the target noise floor is S1 and S2. If T2 is a suspected false alarm caused by base station B, then after base station B's inverse slope configuration, the correlation peak of the echo signal received by base station A disappears within the suspected false alarm range gate after matched filtering. The suspected false alarm range gate can be a preset range before and after the reception time of the echo signal corresponding to the suspected false alarm target. Based on this conclusion, after the base station determines a suspected false alarm, it requests neighboring station code division from the network management system for further verification of the false alarm. Assuming base station A is the affected station and base station B is the interfering station, the specific steps are as follows: Step 1001: Base station A determines that the suspected false alarm and the harassing station is base station B, and sends a modulation request (or modulation request) containing the identity information of base station B to the network management system.

[0070] Step 1002: After receiving the modulation request, the network management system queries the waveform code slope (i.e., modulation frequency) of base station B. If it is the same as the slope of base station A, it sends an anti-slope modulation command to base station B. After receiving the command, when the next processing cycle starts, base station B configures the modulation slope to be a second slope (second modulation frequency) that is opposite to the first slope (first modulation frequency) used by base station A, and feeds back the configuration result to the network management system.

[0071] Step 1003: The network management system forwards the configuration results fed back by base station B to base station A, and notifies base station A to perform false alarm verification.

[0072] Step 1005: Base station A receives the configuration result from base station B and verifies the suspected false alarm by checking whether the correlation peak within the distance gate of the suspected false alarm has disappeared. If the correlation peak disappears after modulation, it can be determined that the target is a false alarm caused by base station B.

[0073] Step 1006: After the verification is completed, base station A sends the verification completion information to the network management system, which then notifies base station B to restore the slope.

[0074] Step 1007: Base station B restores the slope to the first slope and sends a notification to the network management system that the modulation parameters have been restored.

[0075] The following simulation process further illustrates the slope code division false alarm check scheme proposed in the embodiments of this application.

[0076] Given that base station A has coordinates (0, 0, 0) and its outermost neighboring base station B has coordinates (800, 0, 0), with a station spacing of 800m, and a target T initially at position (300, 300, 0) moving at a constant speed, and that base stations A and B, along with the target, are all LOS (Line-of-Sight) paths, the scenario is as follows: Figure 10 As shown, base station A receives not only its own echo but also echoes from other sources, meaning it receives the echoes from signals transmitted by base station B reflected back to the base station by the target. This creates two detection points at base station A. Based on the above positional relationships, the radial distance to target T1 calculated from the self-echo echo is 424m with an angle of 45°, while the radial distance to target T2 calculated from the other-echo echo is (424+583) / 2=503m with an angle of 45°.

[0077] Base station A first matches the distance and angle relationship between two targets. If the two targets have the same angle but different distances, it then determines whether the target meets the false alarm reflection path distance relationship by combining the location of neighboring stations. It should be noted that "same angle" means that the difference between the two angles is within a preset error range, not that they are absolutely identical, and the existence of measurement error is allowed.

[0078] Assuming T1 is the real target, the distance to the escort target should be (424+583) / 2=503m. This result is consistent with the distance to target T2, so target T2 is considered a suspected false alarm, and base station B is the suspected jamming station that generated the false alarm. If we assume T2 is the real target, the distance to the escort target should be (503+569) / 2=536m, which is inconsistent with the distance to target T1 and exceeds the preset error range. ε Therefore, this assumption is invalid.

[0079] After obtaining the suspected false alarm target and the suspected interfering station, base station A requests the network management system to configure the reverse slope of base station B. After the modulation slope of base station B is opposite in sign to the slope used by base station A, base station A judges the echo characteristics of target T2 after the range gate matched filter. If the correlation peak disappears, it can be determined that target 2 is a false alarm caused by base station B.

[0080] like Figure 11a As shown, before modulation, when base station B uses the same slope as base station A, there are two correlation peaks in the echo, including the correlation peak corresponding to the real target and the correlation peak generated by the false alarm caused by the transmission and reception of the target. Figure 11bAs shown, after modulation, when base station B adopts a slope opposite to that of base station A, the false alarm correlation peak disappears. The signal-to-noise ratio of the true target decreases by approximately 5 dB, resulting in a transient decrease in accuracy.

[0081] In summary, this application proposes a false alarm verification scheme based on dynamic slope modulation for accompanying flights. It uses base station site information and target detection information to distinguish between suspected false alarms and suspected interfering stations. It uses positive and negative slope code division of pulse waves to reduce correlation peak interference under networking conditions. Through dynamic code division configuration of suspected interfering stations, it assists the base station in verifying false alarms during accompanying flights.

[0082] Optionally, the base station can determine suspected false alarms based on the current target distance, angle relationship, and neighboring station location relationship. If the two targets have the same angle but different distances, the accompanying flight reflection path can be calculated by combining the neighboring station location information. If it is assumed that the distance of the accompanying target matches the theoretical distance of the accompanying flight reflection path, then the suspected false alarm can be determined.

[0083] Optionally, positive and negative slope code division of inter-station waveforms can be used to reduce correlation peak interference between neighboring stations on the same frequency, while increasing the degree of freedom in the use of base station time and frequency code resources.

[0084] Optionally, after identifying a suspected false alarm from a neighboring station, the base station requests different slope configurations (e.g., reverse slope) from the network management system to assist in the false alarm verification. Upon receiving feedback on the reverse slope configuration from the neighboring station, the base station detects relevant peaks within the distance threshold of the suspected neighboring target. If the relevant peaks disappear, the target can be confirmed as a false alarm. After verification, the neighboring station reverts to its normal configuration.

[0085] The false alarm identification device provided in the embodiments of this application is described below. The false alarm identification device described below can be referred to in correspondence with the false alarm identification method described above.

[0086] The network device involved in the embodiments of this application can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, a base station may also be called an access point, or a device in an access network that communicates with wireless terminal devices through one or more sectors on the air interface, or other names.

[0087] Figure 12 This is a schematic diagram of a network device according to an embodiment of this application. The network device may be the first network device or the second network device described in the above method embodiments. (Refer to...) Figure 12 This application embodiment also provides a network device, which may be a first network device, specifically including: a memory 1210, a transceiver 1220 and a processor 1230; Memory 1210 is used to store computer programs; transceiver 1220 is used to send and receive data under the control of processor 1230; processor 1230 is used to read the computer program in memory 1210 and perform the following operations: In response to the identification of a target suspected to be a false alarm, the system acquires the identity information of a second network device that is interfering with the first network device; the second network device and the first network device transmit linear frequency modulated pulse signals with the same modulation frequency, both being the first modulation frequency; a modulation request is sent to the network management device; the modulation request carries the identity information; the modulation request is used to trigger the network management device to send a modulation command to the second network device, the modulation command is used to trigger the second network device to modulate the modulation frequency of the transmitted linear frequency modulated pulse signal from the first modulation frequency to the second modulation frequency within at least one processing cycle; the first modulation frequency and the second modulation frequency are different; in response to receiving configuration result information forwarded by the network management device indicating that the modulation frequency corresponding to the second network device has been modulated, the system determines whether the correlation peak within the distance threshold corresponding to the target has weakened within at least one processing cycle; the correlation peak is obtained by matched filtering of the linear frequency modulated pulse signal transmitted by the first network device and the received echo signal corresponding to the target; in response to the weakening of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle, the system determines that the target is a false alarm.

[0088] Among them, Figure 12 In this context, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 1230) and memory (memory 1210). The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. A bus interface provides an interface. Transceiver 1220 may be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium. Processor 1230 is responsible for managing the bus architecture and general processing, and memory 1210 may store data used by processor 1230 during operation.

[0089] Optionally, the processor 1230 is also used to perform the following operations: When the second modulation frequency is opposite in sign to the first modulation frequency and the absolute value is equal, it can be determined whether the correlation peak within the distance threshold corresponding to the target weakens within at least one processing cycle, or whether the correlation peak within the distance threshold corresponding to the target disappears within at least one processing cycle; in response to the weakening of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle, the target is determined to be a false alarm, or in response to the disappearance of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle, the target is determined to be a false alarm.

[0090] Before acquiring the identity information of the second network device that interferes with the first network device after recognizing the target that generates a false alarm, the processor 1230 may also perform the following operations: detect the first target and the second target based on the transmitted linear frequency modulated pulse signal; and, in response to the fact that the radial distances corresponding to the first target and the second target are different but the angles are the same, identify the first target or the second target as a false alarm based on the coordinate information of the first network device and the second network device in a specified coordinate system and the radial distances corresponding to the first target and the second target.

[0091] Based on the coordinate information of the first network device and the second network device in a specified coordinate system, and the radial distances corresponding to the first target and the second target, respectively, identifying the first target or the second target as a false alarm can be achieved by the processor 1230 acquiring the longitude, latitude, and altitude information of the second network device that interferes with the first network device, and converting the longitude, latitude, and altitude information into second coordinates in the specified coordinate system; subsequently, the processor 1230 performs at least one of the following operations: Based on the second coordinates and the third coordinates of the first target, calculate the first distance between the second network device and the first target; average the first radial distance and the first distance corresponding to the first target as the first target distance; the first target distance is the distance traveled by the linear frequency modulated pulse signal emitted by the second network device after being reflected from the first target to the first network device; if the difference between the second radial distance corresponding to the second target and the first target distance is within a preset error range, identify the second target as a false alarm; Alternatively, based on the second coordinate and the fourth coordinate of the second target, calculate the second distance between the second network device and the second target; average the second radial distance and the second distance corresponding to the second target as the second target distance; the second target distance is the distance traveled by the linear frequency modulated pulse signal emitted by the second network device after being reflected by the second target to the first network device; if the difference between the first radial distance corresponding to the first target and the second target distance is within a preset error range, identify the first target as a false alarm.

[0092] After determining that the target is a false alarm, the processor 1230 can also send a verification completion message to the network management device; the verification completion message is used to trigger the second network device to restore the modulation frequency of the linear frequency modulation pulse signal from the second modulation frequency to the first modulation frequency.

[0093] It should be noted that the terminal and network device provided in this application embodiment can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0094] The structural design of the second network device in this embodiment can be referred to... Figure 12The above description of the first network device will not be repeated here. Unlike the first network device, the processor of the second network device is used to read the computer program in the memory and perform the following operations: In response to receiving a modulation command from a network management device, the frequency modulation of the transmitted linear frequency modulated pulse signal is modulated from a first frequency modulation to a second frequency modulation within at least one processing cycle; the first frequency modulation is different from the second frequency modulation; configuration result information is sent to the network management device to trigger the network management device to forward the configuration result information to the first network device; the configuration result information is used to indicate whether the frequency modulation corresponding to the second network device has been modulated.

[0095] Figure 13 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 13 As shown, the electronic device may include: a processor 1310, a communication interface 1320, a memory 1330, and a communication bus 1340, wherein the processor 1310, the communication interface 1320, and the memory 1330 communicate with each other via the communication bus 1340. The processor 1310 can call a computer program stored in the memory 1330 to execute the steps of the false alarm identification method, such as including: In response to the identification of a target suspected to be a false alarm, the system acquires the identity information of a second network device that is interfering with the first network device; the second network device and the first network device transmit linear frequency modulated pulse signals with the same modulation frequency, both being the first modulation frequency; a modulation request is sent to the network management device; the modulation request carries the identity information; the modulation request is used to trigger the network management device to send a modulation command to the second network device, the modulation command is used to trigger the second network device to modulate the modulation frequency of the transmitted linear frequency modulated pulse signal from the first modulation frequency to the second modulation frequency within at least one processing cycle; the first modulation frequency and the second modulation frequency are different; in response to receiving configuration result information forwarded by the network management device indicating that the modulation frequency corresponding to the second network device has been modulated, the system determines whether the correlation peak within the distance threshold corresponding to the target has weakened within at least one processing cycle; the correlation peak is obtained by matched filtering of the linear frequency modulated pulse signal transmitted by the first network device and the received echo signal corresponding to the target; in response to the weakening of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle, the system determines that the target is a false alarm.

[0096] Alternatively, in response to receiving a modulation request from the first network device, a modulation instruction is sent to the second network device corresponding to the identity information according to the identity information carried in the modulation request; wherein, the modulation instruction is used to trigger the second network device to modulate the frequency of the transmitted linear frequency modulated pulse signal from the first frequency to the second frequency within at least one processing cycle; the first frequency and the second frequency are different.

[0097] Alternatively, in response to receiving a modulation command from the network management device, the modulation frequency of the transmitted linear frequency modulated pulse signal is modulated from a first modulation frequency to a second modulation frequency within at least one processing cycle; the first modulation frequency is different from the second modulation frequency; configuration result information is sent to the network management device to trigger the network management device to forward the configuration result information to the first network device; the configuration result information is used to indicate whether the modulation frequency corresponding to the second network device has been modulated.

[0098] Furthermore, the logical instructions in the aforementioned memory 1330 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0099] On the other hand, this application also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform the steps of the false alarm identification method provided in the above embodiments, such as: In response to the identification of a target suspected to be a false alarm, the system acquires the identity information of a second network device that is interfering with the first network device; the second network device and the first network device transmit linear frequency modulated pulse signals with the same modulation frequency, both being the first modulation frequency; a modulation request is sent to the network management device; the modulation request carries the identity information; the modulation request is used to trigger the network management device to send a modulation command to the second network device, the modulation command is used to trigger the second network device to modulate the modulation frequency of the transmitted linear frequency modulated pulse signal from the first modulation frequency to the second modulation frequency within at least one processing cycle; the first modulation frequency and the second modulation frequency are different; in response to receiving configuration result information forwarded by the network management device indicating that the modulation frequency corresponding to the second network device has been modulated, the system determines whether the correlation peak within the distance threshold corresponding to the target has weakened within at least one processing cycle; the correlation peak is obtained by matched filtering of the linear frequency modulated pulse signal transmitted by the first network device and the received echo signal corresponding to the target; in response to the weakening of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle, the system determines that the target is a false alarm.

[0100] Alternatively, in response to receiving a modulation request from the first network device, a modulation instruction is sent to the second network device corresponding to the identity information according to the identity information carried in the modulation request; wherein, the modulation instruction is used to trigger the second network device to modulate the frequency of the transmitted linear frequency modulated pulse signal from the first frequency to the second frequency within at least one processing cycle; the first frequency and the second frequency are different.

[0101] Alternatively, in response to receiving a modulation command from the network management device, the modulation frequency of the transmitted linear frequency modulated pulse signal is modulated from a first modulation frequency to a second modulation frequency within at least one processing cycle; the first modulation frequency is different from the second modulation frequency; configuration result information is sent to the network management device to trigger the network management device to forward the configuration result information to the first network device; the configuration result information is used to indicate whether the modulation frequency corresponding to the second network device has been modulated.

[0102] On the other hand, embodiments of this application also provide a processor-readable storage medium storing a computer program for causing a processor to perform the steps of the methods provided in the above embodiments, such as including: In response to the identification of a target suspected to be a false alarm, the system acquires the identity information of a second network device that is interfering with the first network device; the second network device and the first network device transmit linear frequency modulated pulse signals with the same modulation frequency, both being the first modulation frequency; a modulation request is sent to the network management device; the modulation request carries the identity information; the modulation request is used to trigger the network management device to send a modulation command to the second network device, the modulation command is used to trigger the second network device to modulate the modulation frequency of the transmitted linear frequency modulated pulse signal from the first modulation frequency to the second modulation frequency within at least one processing cycle; the first modulation frequency and the second modulation frequency are different; in response to receiving configuration result information forwarded by the network management device indicating that the modulation frequency corresponding to the second network device has been modulated, the system determines whether the correlation peak within the distance threshold corresponding to the target has weakened within at least one processing cycle; the correlation peak is obtained by matched filtering of the linear frequency modulated pulse signal transmitted by the first network device and the received echo signal corresponding to the target; in response to the weakening of the correlation peak within the distance threshold corresponding to the target within at least one processing cycle, the system determines that the target is a false alarm.

[0103] Alternatively, in response to receiving a modulation request from the first network device, a modulation instruction is sent to the second network device corresponding to the identity information according to the identity information carried in the modulation request; wherein, the modulation instruction is used to trigger the second network device to modulate the frequency of the transmitted linear frequency modulated pulse signal from the first frequency to the second frequency within at least one processing cycle; the first frequency and the second frequency are different.

[0104] Alternatively, in response to receiving a modulation command from the network management device, the modulation frequency of the transmitted linear frequency modulated pulse signal is modulated from a first modulation frequency to a second modulation frequency within at least one processing cycle; the first modulation frequency is different from the second modulation frequency; configuration result information is sent to the network management device to trigger the network management device to forward the configuration result information to the first network device; the configuration result information is used to indicate whether the modulation frequency corresponding to the second network device has been modulated.

[0105] The processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO)), optical memory (e.g., CD, DVD, BD, HVD), and semiconductor memory (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)).

[0106] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0107] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A false alarm identification method, characterized in that, The method is applied to a first network device, and the method includes: In response to the identification of a target suspected to be a false alarm, the identity information of the second network device that interferes with the first network device is obtained; the second network device and the first network device respectively transmit linear frequency modulated pulse signals with the same modulation frequency and both are the first modulation frequency; A modulation request is sent to the network management device; the modulation request carries the identity information; the modulation request is used to trigger the network management device to send a modulation instruction to the second network device, the modulation instruction is used to trigger the second network device to modulate the frequency of the transmitted linear frequency modulated pulse signal from a first frequency to a second frequency within at least one processing cycle; the first frequency and the second frequency are different. In response to receiving configuration result information forwarded by the network management device indicating that the frequency modulation frequency corresponding to the second network device has been modulated, it is determined whether the correlation peak within the distance threshold corresponding to the target has weakened within the at least one processing cycle; the correlation peak is obtained by matched filtering of the linear frequency modulation pulse signal transmitted by the first network device and the echo signal corresponding to the target received; In response to a decrease in the correlation peak within the distance threshold corresponding to the target during the at least one processing cycle, the target is determined to be a false alarm.

2. The method according to claim 1, characterized in that, The second modulation frequency is opposite in sign to the first modulation frequency and has the same absolute value; The determination of whether the correlation peak within the distance threshold corresponding to the target weakens within the at least one processing cycle includes: Determine whether the relevant peak within the distance threshold corresponding to the target disappears within the at least one processing cycle; Determining a false alarm for a target in response to a decrease in the correlation peak within a distance threshold corresponding to the target during the at least one processing cycle includes: In response to the disappearance of the correlation peak within the distance threshold corresponding to the target during the at least one processing cycle, the target is determined to be a false alarm.

3. The method according to claim 1 or 2, characterized in that, Before obtaining the identity information of the second network device that interfered with the first network device in response to identifying the target that generated the false alarm, the method further includes: Based on the transmitted linear frequency modulated pulse signal, the first and second targets were detected; In response to the fact that the radial distances corresponding to the first target and the second target are different but the angles are the same, the first target or the second target is identified as a false alarm based on the coordinate information of the first network device and the second network device in the specified coordinate system and the radial distances corresponding to the first target and the second target.

4. The method according to claim 3, characterized in that, Identifying a false alarm for either the first target or the second target based on the coordinate information of the first network device and the second network device in a specified coordinate system, and the radial distances corresponding to the first target and the second target, includes: Obtain the longitude, latitude, and altitude information of the second network device that interferes with the first network device, and convert the longitude, latitude, and altitude information into second coordinates in a specified coordinate system; Calculate the first distance from the second network device to the first target based on the second coordinates and the third coordinates of the first target; The average of the first radial distance and the first distance corresponding to the first target is taken as the first target distance; the first target distance is the distance traveled by the linear frequency modulated pulse signal emitted by the second network device after being reflected from the first target to the first network device; If the difference between the second radial distance corresponding to the second target and the distance to the first target is within a preset error range, the second target is identified as a false alarm. or, Calculate the second distance from the second network device to the second target based on the second coordinates and the fourth coordinates of the second target; The average of the second radial distance and the second distance corresponding to the second target is taken as the second target distance; the second target distance is the distance traveled by the linear frequency modulated pulse signal emitted by the second network device after being reflected from the second target to the first network device; If the difference between the first radial distance corresponding to the first target and the distance to the second target is within a preset error range, the first target is identified as a false alarm.

5. The method according to any one of claims 1-2 or 4, characterized in that, After determining that the target is a false alarm, the method further includes: Send verification completion information to the network management device; the verification completion information is used to trigger the second network device to restore the modulation frequency of the linear frequency modulation pulse signal from the second modulation frequency to the first modulation frequency.

6. A false alarm identification method, characterized in that, The method is applied to a network management device, and the method includes: In response to receiving a modulation request sent by a first network device, a modulation instruction is sent to a second network device corresponding to the identity information according to the identity information carried in the modulation request; The modulation command is used to trigger the second network device to modulate the frequency of the transmitted linear frequency modulated pulse signal from the first frequency modulation to the second frequency modulation within at least one processing cycle; the first frequency modulation is different from the second frequency modulation.

7. The method according to claim 6, characterized in that, The modulation request also carries the frequency modulation information of the linear frequency modulated pulse signal transmitted by the first network device; Based on the identity information carried in the modulation request, a modulation instruction is sent to the second network device corresponding to the identity information, including: Based on the identity information carried in the modulation request, query the modulation frequency of the linear frequency modulated pulse signal transmitted by the second network device corresponding to the identity information; In response to the fact that the modulation frequency of the linear frequency modulated pulse signal transmitted by the second network device is the same as that of the linear frequency modulated pulse signal transmitted by the first network device, a modulation command is sent to the second network device corresponding to the identity information.

8. A false alarm identification method, characterized in that, The method is applied to a second network device, and the method includes: In response to receiving a modulation command from a network management device, the modulation frequency of the transmitted linear frequency modulated pulse signal is modulated from a first modulation frequency to a second modulation frequency within at least one processing cycle; the first modulation frequency is different from the second modulation frequency. Sending configuration result information to the network management device triggers the network management device to forward the configuration result information to the first network device; the configuration result information is used to indicate whether the modulation frequency corresponding to the second network device has been modulated.

9. A false alarm detection device, characterized in that, include: The acquisition module is used to acquire the identity information of the second network device that is interfering with the first network device in response to the identification of a target suspected of being a false alarm. The second network device and the first network device transmit linear frequency modulated pulse signals with the same modulation frequency, and both are the first modulation frequency. The modulation request module is used to send modulation requests to the network management device; The modulation request carries the identity information; The modulation request is used to request that the modulation frequency of the linear frequency modulated pulse signal transmitted by the second network device be changed from a first modulation frequency to a second modulation frequency within at least one processing cycle; the first modulation frequency is different from the second modulation frequency. The discrimination module is used to, in response to receiving configuration result information forwarded by the network management device indicating that the frequency modulation frequency corresponding to the second network device has been modulated, determine whether the correlation peak within the distance threshold corresponding to the target has weakened within the at least one processing cycle; the correlation peak is obtained by matching and filtering the linear frequency modulation pulse signal transmitted by the first network device and the echo signal corresponding to the target received; A determination module is configured to determine that the target is a false alarm in response to a decrease in the correlation peak within a distance threshold corresponding to the target during the at least one processing cycle.

10. A network device, characterized in that, Includes memory, transceiver, and processor; A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: In response to the identification of a target suspected to be a false alarm, the identity information of the second network device that interferes with the first network device is obtained; the second network device and the first network device respectively transmit linear frequency modulated pulse signals with the same modulation frequency and both are the first modulation frequency; Send a modulation request to the network management device; The modulation request carries the identity information; The modulation request is used to request that the modulation frequency of the linear frequency modulated pulse signal transmitted by the second network device be changed from a first modulation frequency to a second modulation frequency within at least one processing cycle; the first modulation frequency is different from the second modulation frequency. In response to receiving configuration result information forwarded by the network management device indicating that the frequency modulation frequency corresponding to the second network device has been modulated, it is determined whether the correlation peak within the distance threshold corresponding to the target has weakened within the at least one processing cycle; the correlation peak is obtained by matched filtering of the linear frequency modulation pulse signal transmitted by the first network device and the echo signal corresponding to the target received; In response to a decrease in the correlation peak within the distance threshold corresponding to the target during the at least one processing cycle, the target is determined to be a false alarm.

11. An electronic device comprising a processor and a memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the false alarm identification method according to any one of claims 1 to 5, or the steps of the false alarm identification method according to any one of claims 6 to 7, or the steps of the false alarm identification method according to claim 8.

12. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the false alarm identification method as described in any one of claims 1 to 5.

13. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the false alarm identification method according to any one of claims 1 to 5, or the steps of the false alarm identification method according to any one of claims 6 to 7, or the steps of the false alarm identification method according to claim 8.

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