A frequency hopping rate optimization method and device against tracking jamming

Abstract

The application discloses a frequency hopping rate optimization method and device against tracking jamming, and the method comprises the following steps: establishing an anti-tracking jamming packet loss rate model based on a Cartesian coordinate system; considering the frequency hopping damage, proposing a frequency hopping rate optimization decision algorithm, solving the anti-tracking jamming packet loss rate model, obtaining the optimal solution of the frequency hopping preparation time, dynamically adjusting the frequency hopping rate each time, reducing the packet loss influence caused by the tracking jamming, and realizing the minimization of the system average comprehensive packet loss rate. The technical scheme of the application can be used in a complex communication scene, and under the mechanism that the opposite party uses tracking jamming, the anti-jamming and the reduction of the packet loss rate can be realized.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to a method and apparatus for optimizing frequency hopping rate to resist tracking interference. Background Technology

[0002] Frequency-hopping communication technology is widely used in communication countermeasures scenarios due to its high frequency utilization and strong anti-interference capabilities. Common types of interference all have significant drawbacks. Broadband noise interference has a relatively limited impact on frequency-hopping communication systems; when the frequency hopping bandwidth is large, broadband noise interference requires very high power to have any effect, resulting in low interference efficiency. Since some frequency band noise interference has a fixed interference frequency band, its impact on frequency-hopping communication systems is relatively small, and the interference effect decreases as the bandwidth of the frequency-hopping system increases. However, tracking interference can adjust the interference frequency band according to the communication frequency band of the frequency-hopping signal, improving the interference success rate and causing some impact on the frequency-hopping communication system. In complex communication environments, tracking interference poses a significant threat to frequency-hopping systems. Currently, the frequencies in frequency-hopping communication systems jump according to a pseudo-random sequence, exhibiting a certain regularity, which easily leads to weak anti-tracking interference capabilities. In complex environments with tracking interference mechanisms, increasing the frequency hopping rate is generally used to reduce the impact of tracking interference. Increasing the frequency hopping rate and maintaining it within a reasonable range can reduce the packet loss rate, but as the frequency hopping rate exceeds a certain threshold, the effective transmission time per unit time gradually decreases. To maintain a constant symbol transmission rate, information needs to be compressed, which reduces the symbol-to-channel ratio, thus increasing frequency hopping impairment and degrading the overall performance of the frequency hopping communication system. Determining the optimal frequency hopping rate for each iteration to minimize packet loss is a major challenge in the development of frequency hopping systems. Therefore, researching frequency hopping rate optimization methods is crucial. Summary of the Invention

[0003] This invention provides a frequency hopping rate optimization method and apparatus to resist tracking interference. Without changing the overall transmission rate, it dynamically adjusts the frequency hopping rate each time, taking into account the frequency hopping impairment, so as to reduce the packet loss caused by tracking interference and solve the technical problem of increased transmission packet loss rate caused by tracking interference.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] On one hand, the present invention provides a frequency hopping rate optimization method for resisting tracking interference, comprising:

[0006] Establish a tracking interference-resistant packet loss rate model based on the Cartesian coordinate system;

[0007] Considering the impact of frequency hopping, a frequency hopping rate optimization decision algorithm is proposed to solve the anti-tracking interference packet loss rate model and obtain the optimal solution for frequency hopping preparation time. This allows for dynamic adjustment of the frequency hopping rate each time, reducing the impact of packet loss caused by tracking interference and minimizing the average overall packet loss rate of the system.

[0008] Furthermore, the anti-tracking interference packet loss rate model is expressed as:

[0009]

[0010] Wherein, PLR is the overall packet loss rate after N frequency hopping iterations. Let be the packet loss rate caused by interference signals during the i-th frequency hopping. Let be the packet loss rate caused by frequency hopping impairment during the i-th frequency hopping.

[0011] Furthermore, considering the frequency hopping impairment, a frequency hopping rate optimization decision algorithm is proposed to solve the anti-tracking interference packet loss rate model to obtain the optimal solution for the frequency hopping preparation time, including:

[0012] Initialize the coordinates of the frequency hopping signal and the interference signal in a Cartesian coordinate system, and set the pseudo-random sequence, time parameters, and frequency hopping block parameters for each frequency hopping center frequency; wherein, the time parameters include the signal rise time and the signal fall time; the frequency hopping block parameters include the height and width of the frequency hopping block;

[0013] Set the scanning rate of the interfering frequency band, traverse the frequency hopping preparation time within the preset range, calculate the current transmission time, the shortest distance from the previous interfering signal frequency band to the current frequency hopping signal frequency band, and the theoretically scannable distance of the interfering signal within the transmission time range;

[0014] Determine whether the shortest distance is greater than the theoretically scannable distance of the interference signal within the transmission time range. If so, calculate the overlapping area when scanned and the packet loss rate caused by the interference signal; otherwise, the packet loss rate caused by the interference signal is zero. Calculate the communication packet loss rate caused by frequency hopping impairment.

[0015] Based on the calculated packet loss rate caused by interference signals and the communication packet loss rate caused by frequency hopping impairment, the overall packet loss rate is estimated, and the frequency hopping preparation time that minimizes it is identified as the optimal frequency hopping preparation time.

[0016] Furthermore, after obtaining the optimal frequency hopping preparation time, the frequency hopping rate optimization method for resisting tracking interference also includes:

[0017] Execute the frequency hopping action according to the optimal frequency hopping preparation time;

[0018] Calculate the actual overall packet loss rate for a single instance;

[0019] Perform frequency hopping actions for N iterations and calculate the average packet loss rate of the frequency hopping system.

[0020] On the other hand, the present invention also provides a frequency hopping rate optimization device for resisting tracking interference, comprising:

[0021] The anti-tracking interference packet loss rate model construction module is used to establish an anti-tracking interference packet loss rate model based on the Cartesian coordinate system.

[0022] The frequency hopping rate dynamic adjustment and optimization module is used to take into account the frequency hopping impairment and propose a frequency hopping rate optimization decision algorithm. It solves the anti-tracking interference packet loss rate model constructed by the anti-tracking interference packet loss rate model construction module to obtain the optimal solution for the frequency hopping preparation time, so as to dynamically adjust the frequency hopping rate each time, reduce the packet loss impact caused by tracking interference, and minimize the average comprehensive packet loss rate of the system.

[0023] Furthermore, the anti-tracking interference packet loss rate model constructed by the anti-tracking interference packet loss rate model construction module is expressed as follows:

[0024]

[0025] Wherein, PLR is the overall packet loss rate after N frequency hopping iterations. Let be the packet loss rate caused by interference signals during the i-th frequency hopping. Let be the packet loss rate caused by frequency hopping impairment during the i-th frequency hopping.

[0026] Furthermore, the frequency hopping rate dynamic adjustment and optimization module is specifically used for:

[0027] Initialize the coordinates of the frequency hopping signal and the interference signal in a Cartesian coordinate system, and set the pseudo-random sequence, time parameters, and frequency hopping block parameters for each frequency hopping center frequency; wherein, the time parameters include the signal rise time and the signal fall time; the frequency hopping block parameters include the height and width of the frequency hopping block;

[0028] Set the scanning rate of the interfering frequency band, traverse the frequency hopping preparation time within the preset range, calculate the current transmission time, the shortest distance from the previous interfering signal frequency band to the current frequency hopping signal frequency band, and the theoretically scannable distance of the interfering signal within the transmission time range;

[0029] Determine whether the shortest distance is greater than the theoretically scannable distance of the interference signal within the transmission time range. If so, calculate the overlapping area when scanned and the packet loss rate caused by the interference signal; otherwise, the packet loss rate caused by the interference signal is zero. Calculate the communication packet loss rate caused by frequency hopping impairment.

[0030] Based on the calculated packet loss rate caused by interference signals and the communication packet loss rate caused by frequency hopping impairment, the overall packet loss rate is estimated, and the frequency hopping preparation time that minimizes it is identified as the optimal frequency hopping preparation time.

[0031] Furthermore, the frequency hopping rate dynamic adjustment and optimization module is also used for:

[0032] Execute the frequency hopping action according to the optimal frequency hopping preparation time;

[0033] Calculate the actual overall packet loss rate for a single instance;

[0034] Perform frequency hopping actions for N iterations and calculate the average packet loss rate of the frequency hopping system.

[0035] In another aspect, the present invention also provides an electronic device comprising a processor and a memory; wherein the memory stores at least one instruction, which is loaded and executed by the processor to implement the above-described method.

[0036] In another aspect, the present invention also provides a computer-readable storage medium storing at least one instruction that is loaded and executed by a processor to implement the above-described method.

[0037] The beneficial effects of the technical solution provided by this invention include at least the following:

[0038] The technical solution of this invention can be applied to complex communication scenarios. When the other party uses tracking interference, it establishes an anti-tracking interference packet loss rate model based on a Cartesian coordinate system. Considering frequency hopping impairment, a frequency hopping rate optimization decision algorithm is proposed to solve the anti-tracking model, obtaining the optimal solution for the frequency hopping preparation time. This dynamically adjusts the frequency hopping rate each time, reducing the packet loss impact caused by tracking interference and minimizing the system's average overall packet loss rate. Thus, it achieves anti-interference and reduces the packet loss rate. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a flowchart of the frequency hopping rate optimization method for anti-tracking interference provided in an embodiment of the present invention;

[0041] Figure 2 This is a flowchart of the frequency hopping rate optimization decision algorithm provided in this embodiment of the invention;

[0042] Figure 3 This is a schematic diagram illustrating the principle of tracking interference;

[0043] Figure 4 This is a schematic diagram of the interference range of frequency hopping signals. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0045] First Embodiment

[0046] To address the severe packet loss rate problem caused by tracking interference in communication environments, this embodiment provides a frequency hopping rate optimization method to combat tracking interference. This method can be implemented by an electronic device, such as a terminal or a server. The execution flow of this method is as follows: Figure 1 As shown, it includes the following steps:

[0047] S1, Establish a tracking interference-resistant packet loss rate model based on the Cartesian coordinate system;

[0048] S2. Considering the frequency hopping impairment, a frequency hopping rate optimization decision algorithm is proposed to solve the anti-tracking interference packet loss rate model and obtain the optimal solution for the frequency hopping preparation time. This allows for dynamic adjustment of the frequency hopping rate each time, reducing the impact of packet loss caused by tracking interference and minimizing the average overall packet loss rate of the system.

[0049] The anti-tracking interference packet loss rate model is expressed as follows:

[0050]

[0051] Wherein, PLR is the overall packet loss rate after N frequency hopping iterations. Let be the packet loss rate caused by interference signals during the i-th frequency hopping. Let be the packet loss rate caused by frequency hopping impairment during the i-th frequency hopping.

[0052] Below, in conjunction with Figure 3 and Figure 4 The construction of the anti-tracking interference model is explained in detail.

[0053] like Figure 3As shown, a Cartesian coordinate system is used to characterize the packet loss rate model of tracking jamming. In this system, the x-axis represents time slots, the y-axis represents frequency, and the two colored blocks represent our frequency-hopping signal and the opponent's frequency-hopping signal, respectively. The principle of tracking jamming is that the opponent continuously monitors the channel and scans different frequency bands. If a frequency-hopping signal is detected in a certain band, the jammer quickly transmits a narrowband jamming signal, affecting our communication data transmission. The overlapping area of ​​the two colored blocks in the diagram represents the data packet loss caused by successful jamming. Generally, our signal consists of a frequency band composed of multiple frequencies. During the process of the opponent scanning the frequency band to capture the signal, they only scan a portion of the frequencies, making it difficult to calculate the center frequency of the frequency hopping. Furthermore, there is a time difference between the scanned signal and the transmitted jamming signal. Therefore, there is usually a certain error between the opponent's tracking jamming and our frequency-hopping signal, resulting in partial overlap rather than complete coverage of the colored blocks in the diagram.

[0054] For our frequency hopping signal, a complete frequency hopping cycle consists of a frequency hopping preparation time T. ready Signal rise time T up Transmission time T com and signal fall time T down It consists of four parts, except for the transmission time T. com The external factor is the frequency switching time T. sw ,Right now:

[0055] T sw =T ready +T up +T down (1)

[0056] The entire frequency hopping cycle is represented as:

[0057]

[0058] Increasing the frequency hopping rate to combat tracking interference will increase the frequency switching time T per unit time. sw Increase the effective transmission time T com The signal-to-noise ratio (SNR) of each symbol decreases, and the packet loss rate increases, if the symbol rate remains constant. Therefore, proposing a suitable frequency hopping rate optimization algorithm is crucial to solving this problem.

[0059] For tracking interference, the frequency hopping period is divided into signal detection time T. detect Signal interference time T interf and frequency switching time T swt The jammer has three phases and a time T available to it. able for:

[0060] T able =T detect +T interf (3)

[0061] The overall frequency hopping period is:

[0062]

[0063] In the Cartesian coordinate system, let the initial position of our frequency-hopping signal during the i-th frequency hopping time be . The center frequency of the selected frequency band is F. i a When the signal begins to appear, the coordinates are... At the end of this frequency hopping cycle, our coordinates become Where h represents the height of the mid-frequency band in the coordinate system. If the initial position coordinates of the other party are... Consumption time T i b Frequency hopping signals were detected, and the center frequency of the transmitted interference band was F. i b The coordinates are At the end of this frequency hopping cycle, because the other party exceeded the x-axis... Some of these will not affect our frequency hopping, therefore the other party's coordinates are recorded as follows: like Figure 4 As shown. Therefore, the area of ​​the frequency-hopping signal is:

[0064]

[0065] The portion of packets lost due to interference signals, i.e., the interference overlap area, is:

[0066]

[0067] The packet loss rate caused by interference during the i-th frequency hopping is:

[0068]

[0069] In addition, the packet loss rate due to frequency hopping impairments must also be considered. When the transmission time T... com Less than the threshold When γ is the signal-to-noise ratio impairment coefficient, the packet loss rate is calculated as follows:

[0070]

[0071] Therefore, assuming the frequency-hopping communication system hops N times within a certain period, the average packet loss rate of the frequency-hopping system is:

[0072]

[0073] Based on the above, this embodiment considers the impact of frequency hopping and proposes a frequency hopping rate optimization decision algorithm. This algorithm solves the anti-tracking interference packet loss rate model to obtain the optimal solution for the frequency hopping preparation time, thereby dynamically adjusting the frequency hopping rate each time to minimize the system's average overall packet loss rate. The implementation process is as follows: Let the scanning rate of the opposing frequency band be v. s The shortest distance between the frequency band of the previous interference signal and the current frequency band was calculated. And the theoretically achievable scanning distance: ableDis = v s T com If the shortest distance is greater than the theoretical scanning distance, calculate the overlapping area olArea at the time of scanning. i and interference packet loss rate Otherwise, the frequency hopping signal will not be detected; by traversing the frequency hopping preparation time T within a reasonable range ready Find the optimal decision Taking into account both communication packet loss rate and interference packet loss rate, the overall packet loss rate is minimized.

[0074] Specifically, the execution flow of the frequency hopping rate optimization decision algorithm in this embodiment is as follows: Figure 2 As shown, it includes:

[0075] S201: Initialize the coordinates of our frequency-hopping signal and the opponent's interference signal in the Cartesian coordinate system as follows: and Set a pseudo-random sequence hopList for each frequency hopping center frequency, and set a fixed signal rise time T. up Signal fall time T down and the height h and width w of the frequency hopping block;

[0076] S202: Let the scanning rate of the other frequency band be v. s Within a preset reasonable range, traverse the frequency hopping preparation time T. ready The transmission time at this time is calculated to be T. com =wT ready -T up -T down ; Calculate the shortest distance from the frequency band of the previous interference signal to the frequency band of the current frequency hopping signal. And the theoretically detectable distance of interference signals within the transmission time range: ableDis=v s T com ;

[0077] S203: If the shortest distance is greater than the theoretically scannable distance of the interference signal, then calculate the overlapping area olArea when the signal is scanned. i and interference packet loss rate Otherwise, the frequency hopping signal will not be detected, resulting in a higher packet loss rate. Compare transmission time T com With transmission threshold Calculate the packet loss rate in communication

[0078] S204: Calculate the frequency hopping preparation time T for this time. ready Below, estimate the overall packet loss rate. Find out why PLR j Minimized

[0079] S205: Order We initiate the frequency hopping action and begin iterative calculation of the actual overall packet loss rate for a single instance.

[0080] S206: Iterate through N rounds to calculate the average packet loss rate of the frequency hopping system.

[0081] In summary, this embodiment provides a frequency hopping rate optimization method to resist tracking interference, applicable to complex communication scenarios. Under the influence of tracking interference, a tracking interference packet loss rate model based on a Cartesian coordinate system is established. Considering frequency hopping impairment, a frequency hopping rate optimization decision algorithm is proposed to solve the anti-interference model, obtaining the optimal solution for the frequency hopping preparation time. This dynamically adjusts the frequency hopping rate for each iteration, reducing the packet loss impact caused by tracking interference and minimizing the system's average overall packet loss rate. This achieves anti-interference and reduces the packet loss rate, solving the problem of increased transmission packet loss rate caused by tracking interference.

[0082] Second Embodiment

[0083] This embodiment provides a frequency hopping rate optimization device to resist tracking interference, including the following modules:

[0084] The anti-tracking interference packet loss rate model construction module is used to establish an anti-tracking interference packet loss rate model based on the Cartesian coordinate system.

[0085] The frequency hopping rate dynamic adjustment and optimization module is used to take into account the frequency hopping impairment and propose a frequency hopping rate optimization decision algorithm. It solves the anti-tracking interference packet loss rate model constructed by the anti-tracking interference packet loss rate model construction module to obtain the optimal solution for the frequency hopping preparation time, so as to dynamically adjust the frequency hopping rate each time, reduce the packet loss impact caused by tracking interference, and minimize the average comprehensive packet loss rate of the system.

[0086] The frequency hopping rate optimization device for anti-tracking interference in this embodiment corresponds to the frequency hopping rate optimization method for anti-tracking interference in the first embodiment described above. The functions implemented by each functional module in the frequency hopping rate optimization device for anti-tracking interference in this embodiment correspond one-to-one with the process steps in the frequency hopping rate optimization method for anti-tracking interference in the first embodiment described above. Therefore, it will not be described again here.

[0087] Third Embodiment

[0088] This embodiment provides an electronic device, which includes a processor and a memory; wherein the memory stores at least one instruction, which is loaded and executed by the processor to implement the method of the first embodiment.

[0089] The electronic device can vary considerably depending on its configuration or performance, and may include one or more processors (central processing units, CPUs) and one or more memories, wherein the memories store at least one instruction that is loaded by the processor and executed in accordance with the above method.

[0090] Fourth embodiment

[0091] This embodiment provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the method of the first embodiment described above. The computer-readable storage medium may be a ROM, random access memory, CD-ROM, magnetic tape, floppy disk, or optical data storage device, etc. The instruction stored therein can be loaded and executed by a processor in a terminal.

[0092] Furthermore, it should be noted that the present invention can be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code.

[0093] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0094] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0095] It should also be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0096] Finally, it should be noted that the above description represents a preferred embodiment of the present invention. It should be pointed out that although preferred embodiments have been described, those skilled in the art, once they understand the basic inventive concept of the present invention, can make various improvements and modifications without departing from the principles described herein. These improvements and modifications should also be considered within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

Claims

1. A method for optimizing frequency hopping rate to resist tracking interference, characterized in that, include: Establish a tracking interference-resistant packet loss rate model based on the Cartesian coordinate system; Considering the impact of frequency hopping, a frequency hopping rate optimization decision algorithm is proposed to solve the anti-tracking interference packet loss rate model and obtain the optimal solution for frequency hopping preparation time. This allows for dynamic adjustment of the frequency hopping rate each time, reducing the impact of packet loss caused by tracking interference and minimizing the average overall packet loss rate of the system. The anti-tracking interference packet loss rate model is expressed as follows: ； in, Frequency hopping Overall packet loss rate after the next iteration For the first Packet loss rate due to interference signals in secondary frequency hopping For the first Packet loss rate caused by frequency hopping impairment in secondary frequency hopping; Taking into account frequency hopping impairments, a frequency hopping rate optimization decision algorithm is proposed to solve the anti-tracking interference packet loss rate model and obtain the optimal solution for the frequency hopping preparation time, including: Initialize the coordinates of the frequency hopping signal and the interference signal in a Cartesian coordinate system, and set the pseudo-random sequence, time parameters, and frequency hopping block parameters for each frequency hopping center frequency; wherein, the time parameters include the signal rise time and the signal fall time; the frequency hopping block parameters include the height and width of the frequency hopping block; Set the scanning rate of the interfering frequency band, traverse the frequency hopping preparation time within the preset range, calculate the current transmission time, the shortest distance from the previous interfering signal frequency band to the current frequency hopping signal frequency band, and the theoretically scannable distance of the interfering signal within the transmission time range; Determine whether the shortest distance is greater than the theoretically scannable distance of the interference signal within the transmission time range. If so, calculate the overlapping area when scanned and the packet loss rate caused by the interference signal; otherwise, the packet loss rate caused by the interference signal is zero. Calculate the communication packet loss rate caused by frequency hopping impairment. Based on the calculated packet loss rate caused by interference signals and the communication packet loss rate caused by frequency hopping impairment, the overall packet loss rate is estimated, and the frequency hopping preparation time that minimizes it is identified as the optimal frequency hopping preparation time.

2. The frequency hopping rate optimization method for anti-tracking interference as described in claim 1, characterized in that, After obtaining the optimal frequency hopping preparation time, the frequency hopping rate optimization method for anti-tracking interference further includes: Execute the frequency hopping action according to the optimal frequency hopping preparation time; Calculate the actual overall packet loss rate for a single instance; Execute frequency hopping action iteration Round, calculate the average packet loss rate of the frequency hopping system.

3. A frequency hopping rate optimization device for resisting tracking interference, characterized in that, include: The anti-tracking interference packet loss rate model construction module is used to establish an anti-tracking interference packet loss rate model based on the Cartesian coordinate system. The frequency hopping rate dynamic adjustment and optimization module is used to take into account the frequency hopping impairment and propose a frequency hopping rate optimization decision algorithm. It solves the anti-tracking interference packet loss rate model constructed by the anti-tracking interference packet loss rate model construction module to obtain the optimal solution for frequency hopping preparation time, so as to dynamically adjust the frequency hopping rate each time, reduce the packet loss impact caused by tracking interference, and minimize the average comprehensive packet loss rate of the system. The anti-tracking interference packet loss rate model constructed by the anti-tracking interference packet loss rate model construction module is expressed as follows: ； in, Frequency hopping Overall packet loss rate after the next iteration For the first Packet loss rate due to interference signals in secondary frequency hopping For the first Packet loss rate caused by frequency hopping impairment in secondary frequency hopping; The frequency hopping rate dynamic adjustment and optimization module is specifically used for: Initialize the coordinates of the frequency hopping signal and the interference signal in a Cartesian coordinate system, and set the pseudo-random sequence, time parameters, and frequency hopping block parameters for each frequency hopping center frequency; wherein, the time parameters include the signal rise time and the signal fall time; the frequency hopping block parameters include the height and width of the frequency hopping block; Set the scanning rate of the interfering frequency band, traverse the frequency hopping preparation time within the preset range, calculate the current transmission time, the shortest distance from the previous interfering signal frequency band to the current frequency hopping signal frequency band, and the theoretically scannable distance of the interfering signal within the transmission time range; Determine whether the shortest distance is greater than the theoretically scannable distance of the interference signal within the transmission time range. If so, calculate the overlapping area when scanned and the packet loss rate caused by the interference signal; otherwise, the packet loss rate caused by the interference signal is zero. Calculate the communication packet loss rate caused by frequency hopping impairment. Based on the calculated packet loss rate caused by interference signals and the communication packet loss rate caused by frequency hopping impairment, the overall packet loss rate is estimated, and the frequency hopping preparation time that minimizes it is identified as the optimal frequency hopping preparation time.

4. The frequency hopping rate optimization device for anti-tracking interference as described in claim 3, characterized in that, The frequency hopping rate dynamic adjustment and optimization module is also used for: Execute the frequency hopping action according to the optimal frequency hopping preparation time; Calculate the actual overall packet loss rate for a single instance; Execute frequency hopping action iteration Round, calculate the average packet loss rate of the frequency hopping system.

Images