Information processing device, information processing method, and program

Abstract

To enable appropriate detection of a group pulse when a transmission source device uses the group pulse obtained by combining multiple pulse waves.SOLUTION: Provided is an information processing device having: an acquisition unit for acquiring a signal of each pulse wave of a radar wave received at each time point by an antenna; and a determination unit configured to determine whether or not each pulse wave is a group pulse obtained by combining multiple pulse waves on the basis of a reception frequency of each pulse wave in every pulse interval representing a time length till the next pulse wave.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to an information processing device, an information processing method, and a program. [Background technology]

[0002] Patent Document 1 discloses a technology for discriminating the source (transmitting device) of radar waves or the like based on the forward pulse interval time between a forward received pulse signal received before the received pulse signal and the backward pulse interval time between a backward received pulse signal received after the received pulse signal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-172555 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technology described in Patent Document 1 does not consider, for example, a case where a source device uses a group pulse in which a plurality of pulse waves are combined.

[0005] In view of the above-mentioned problems, an object of the present disclosure is to provide a technology that can appropriately detect a group pulse when a source device uses a group pulse that is a combination of multiple pulse waves. [Means for solving the problem]

[0006] In a first aspect of the present disclosure, there is provided an information processing device having an acquisition unit that acquires a signal of each pulse wave of a radar wave received by an antenna at each time point, and a determination unit that determines whether each pulse wave is a group pulse formed by combining multiple pulse waves based on the reception frequency of each pulse wave at each pulse interval, which is the time length until the next pulse wave.

[0007] In addition, a second aspect of the present disclosure provides an information processing method that acquires a signal of each pulse wave of a radar wave received by an antenna at each time point, and determines whether each pulse wave is a group pulse formed by combining multiple pulse waves based on the reception frequency of each pulse wave at each pulse interval, which is the time length until the next pulse wave.

[0008] In addition, a third aspect of the present disclosure provides a program for causing a computer to execute a process of acquiring a signal of each pulse wave of a radar wave received by an antenna at each time point, and determining whether each pulse wave is a group pulse formed by combining multiple pulse waves based on the reception frequency of each pulse wave at each pulse interval, which is the time length until the next pulse wave. [Effects of the Invention]

[0009] According to one aspect, when a transmission source device uses a group pulse in which a plurality of pulse waves are combined, the group pulse can be appropriately detected. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram illustrating an example of a configuration of an information processing device according to an embodiment. [Figure 2] 1 is a diagram illustrating an example of the configuration of an information processing system according to an embodiment. [Figure 3] FIG. 1 is a diagram illustrating an example of a hardware configuration of an information processing apparatus according to an embodiment. [Figure 4] 10 is a flowchart illustrating an example of processing by the information processing apparatus according to the embodiment. [Figure 5] 5A to 5C are diagrams illustrating an example of pulse wave signals of radar waves received at each time point by an antenna according to an embodiment. [Figure 6] FIG. 10 is a diagram showing an example of a group pulse according to the embodiment. [Figure 7] FIG. 10 is a diagram showing an example of reception frequency for each pulse interval of each pulse wave according to the embodiment. [Figure 8]FIG. 10 is a diagram showing an example of a display of a pulse repetition interval of a group pulse according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The principles of the present disclosure will be described with reference to some exemplary embodiments. It should be understood that these embodiments are set forth for illustrative purposes only, to aid those skilled in the art in understanding and practicing the present disclosure, without implying any limitation on the scope of the disclosure. The disclosure described herein may be implemented in various ways other than those described below.

[0012] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0013] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that each drawing is merely an example for describing one or more embodiments. Each drawing may not relate to only one particular embodiment, but may also relate to one or more other embodiments. As will be understood by those skilled in the art, various features or steps described with reference to any one drawing can be combined with features or steps shown in one or more other drawings to create, for example, an embodiment not explicitly shown or described. Not all features or steps shown in any one drawing are necessarily required to describe an exemplary embodiment, and some features or steps may be omitted. The order of steps described in any drawing may be changed as appropriate.

[0014] (Embodiment 1) <Configuration> The configuration of an information processing device 10 according to an embodiment will be described with reference to Fig. 1. Fig. 1 is a diagram showing an example of the configuration of the information processing device 10 according to an embodiment. The information processing device 10 has an acquisition unit 11 and a determination unit 12. These units may be realized by cooperation between one or more programs installed in the information processing device 10 and hardware such as a processor and memory of the information processing device 10.

[0015] The acquisition unit 11 acquires the signal of each pulse wave of the radar wave received by the antenna at each time point. The determination unit 12 determines whether each pulse wave acquired by the acquisition unit 11 is a group pulse formed by combining multiple pulse waves, based on the reception frequency for each pulse interval, which is the time length until the next pulse wave.

[0016] (Embodiment 2) Next, the configuration of the information processing system 1 according to the embodiment will be described with reference to FIG. <System configuration> FIG. 2 is a diagram showing an example of the configuration of an information processing system 1 according to an embodiment. In the example of FIG. 2, the information processing system 1 includes an information processing device 10, an antenna 20, and transmission source devices 30A to 30C. Hereinafter, when there is no need to distinguish between them, each of the transmission source devices 30A to 30C will also be simply referred to as a "transmission source device 30." The information processing device 10 and the antenna 20 are connected by, for example, a cable or the like. Note that the number of information processing devices 10, antennas 20, and transmission source devices 30 is not limited to the example of FIG. 2.

[0017] The information processing device 10 may be, for example, a server, a cloud server, a personal computer, a tablet terminal, a smartphone, or other device. The information processing device 10 provides, for example, information about a transmission source device 30 present in the vicinity of the antenna 20 to a user (monitor). The antenna 20 receives a pulse wave of a radar wave transmitted from the transmission source device 30, converts the pulse wave into an electrical signal indicating the frequency of the received radio wave and the time point of reception (reception time, reception timing), and outputs the electrical signal to the information processing device 10.

[0018] The transmission source device 30 may be, for example, a ship, an aircraft, a satellite, etc. The transmission source device 30 transmits a radar (Radio Detection And Ranging) wave to measure the distance to another object.

[0019] <Hardware configuration> Fig. 3 is a diagram showing an example of the hardware configuration of an information processing device 10 according to an embodiment. In the example of Fig. 3, the information processing device 10 (computer 100) includes a processor 101, a memory 102, and a communication interface 103. These components may be connected via a bus or the like. The memory 102 stores at least a part of a program 104. The communication interface 103 includes an interface required for communication with other network elements.

[0020] When the program 104 is executed by the processor 101, memory 102, and the like in cooperation with each other, the computer 100 performs at least some of the processing of the embodiments of the present disclosure. The memory 102 may be of any type. As a non-limiting example, the memory 102 may be a non-transitory computer-readable storage medium. The memory 102 may also be implemented using any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory. Although only one memory 102 is shown in the computer 100, several physically different memory modules may exist in the computer 100. The processor 101 may be of any type. The processor 101 may include one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture, as a non-limiting example. The computer 100 may have multiple processors, such as application-specific integrated circuit chips that are time-slaved to a clock that synchronizes the main processor.

[0021] Embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device.

[0022] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions included in program modules, that execute on a target real or virtual processor or device to perform the processes or methods of the present disclosure. Program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or divided among program modules as desired in various embodiments. The machine-executable instructions of the program modules may be executed in local or distributed devices. In a distributed device, the program modules may be located in both local and remote storage media.

[0023] The program code for executing the methods of the present disclosure may be written in any combination of one or more programming languages. The program code may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus. When the program code is executed by the processor or controller, the functions / acts in the flowcharts and / or implementing block diagrams are performed. The program code may be executed entirely on the machine, partly on the machine, as a standalone software package, partly on the machine and partly on a remote machine, or entirely on a remote machine or server.

[0024] The program can be stored and provided to a computer using various types of non-transitory computer-readable media. Non-transitory computer-readable media include various types of tangible recording media. Examples of non-transitory computer-readable media include magnetic recording media, magneto-optical recording media, optical disk media, and semiconductor memory. Magnetic recording media include, for example, flexible disks, magnetic tapes, and hard disk drives. Magneto-optical recording media include, for example, magneto-optical disks. Optical disk media include, for example, Blu-ray discs, CD (Compact Disc)-ROMs (Read Only Memory), CD-Rs (Recordable), and CD-RWs (Rewritable). Semiconductor memory includes, for example, solid-state drives, mask ROMs, PROMs (Programmable ROMs), EPROMs (Erasable PROMs), flash ROMs, and RAMs (Random Access Memory). The program may also be provided to a computer by various types of temporary computer-readable media. Examples of temporary computer-readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire or an optical fiber, or via a wireless communication path.

[0025] <Processing> Next, an example of processing of the information processing device 10 according to the embodiment will be described with reference to Figs. 4 to 8. Fig. 4 is a flowchart showing an example of processing of the information processing device 10 according to the embodiment. Note that the processing of Fig. 4 may be executed, for example, when a specific operation is performed by a user, or at a specific timing such as periodically. Fig. 5 is a diagram showing an example of a pulse wave signal of a radar wave received at each time point by an antenna according to the embodiment. Fig. 6 is a diagram showing an example of a group pulse according to the embodiment. Fig. 7 is a diagram showing an example of the reception frequency for each pulse interval of each pulse wave according to the embodiment. Fig. 8 is a diagram showing an example of a display of the pulse repetition interval of a group pulse according to the embodiment.

[0026] In step S101, the acquisition unit 11 acquires signals of each pulse wave of the radar wave received at each time point by the antenna 20. Here, the acquisition unit 11 acquires from the antenna 20 signals indicating the frequency (center frequency) and the time point of reception (transmission time point) of the pulse wave of the radar wave transmitted from the transmission source device 30 such as a ship.

[0027] 5, the acquisition unit 11 acquires, for example, pulse wave signals of radar waves of a specific frequency at times 521 to 524, etc., at pulse intervals (PI) 511. The acquisition unit 11 also acquires, for example, pulse wave signals of radar waves of a specific frequency at pulse intervals 512, such as at time 531, at pulse intervals 513, such as at time 541, and at pulse intervals 514, such as at time 551. Note that the pulse interval is the length of time from when a pulse wave is received by the antenna 20 to when the next pulse wave is received by the antenna 20.

[0028] Next, the determination unit 12 determines whether each pulse wave acquired by the acquisition unit 11 is a group pulse or not based on the reception frequency of each pulse interval, which is the time length until the next pulse wave (step S102). Note that a group pulse is, for example, a radar wave of a pulse train in which a plurality of pulse waves are combined.

[0029] An example of a group pulse according to the embodiment is shown in Fig. 6. In the example of Fig. 6, the group pulse is composed of a combination of two types of pulses: a short pulse (a pulse with a relatively short pulse width) and a long pulse (a pulse with a relatively long pulse width). The short pulses 611A to 611D are used by the transmission source device 30 to detect an object at a relatively short distance, and the long pulses 621A to 621D are used by the transmission source device 30 to detect an object at a relatively long distance.

[0030] A first group of pulses is formed by a combination of a short pulse 611A and a long pulse 621A. Similarly, a second group of pulses is formed by a combination of a short pulse 611B and a long pulse 621B, and a third group of pulses is formed by a combination of a short pulse 611C and a long pulse 621C.

[0031] The pulse intervals PI of the short pulses 611A to 611D s are the same (fixed value). Also, the pulse intervals PI L ♯1~PI L Therefore, the first group pulse, the second group pulse, and the third group pulse are group pulses in which the pulse repetition intervals of the group pulses are different, but the pulse intervals between the multiple pulse waves included in the group pulses are the same.

[0032] The pulse interval of the long pulse of the radar wave transmitted by the transmission source device 30 is PI L ♯1~PI L The combination #3 is repeated. Therefore, the repetition pattern of the pulse repetition interval (PRI) of the group pulse is a pattern in which the group pulse is repeated every three periods. Note that the pulse repetition interval of the group pulse is, for example, the time length from when the first pulse wave included in a certain group pulse is received by the antenna 20 to when the first pulse wave included in the next group pulse is received by the antenna 20.

[0033] The determination unit 12 may classify each pulse wave into a plurality of classes based on the pulse interval of each pulse wave, and may determine whether or not the pulse waves included in each class are group pulses based on the reception frequency of the pulse waves included in each class.

[0034] In this case, the determination unit 12 may determine that each pulse wave included in the first class and each pulse wave included in the second class are group pulses when the degree of discrepancy between the reception frequency of the pulse waves included in the first class and the reception frequency of the pulse waves included in the second class is equal to or less than a threshold. Examples of the degree of discrepancy may include, for example, a difference value or a ratio value. This allows appropriate determination of whether or not a pulse wave is a group pulse even when the reception frequency of the pulse waves included in the first class does not match the reception frequency of the pulse waves included in the second class due to, for example, timing of determination or noise.

[0035] Alternatively, the determination unit 12 may classify pulse waves with one pulse interval into a first class and pulse waves with other multiple pulse intervals into a second class. Then, based on the reception frequency of pulse waves included in the first class and the reception frequency of pulse waves included in the second class, the determination unit 12 may determine whether the pulse waves included in each class are group pulses in which the pulse repetition intervals of the group pulses are different but the pulse intervals between the multiple pulse waves included in the group pulses are the same. This makes it possible to determine, for example, whether the group pulses are group pulses with the same configuration but with different pulse repetition intervals.

[0036] In this case, the determination unit 12 may classify the first class as a class having a shorter pulse interval than the second class. This allows, for example, more appropriate detection of group pulses. This is because, for example, the transmission source device 30 is considered to have set a relatively short waiting time for a reflected wave in response to a short-pulse radar wave used to detect a relatively close object. Also, the transmission source device 30 is considered to have set a relatively long waiting time for a reflected wave in response to a long-pulse radar wave used to detect a relatively long-distance object.

[0037] Fig. 7 shows an example of the reception frequency (frequency) for each pulse interval of each pulse wave shown in Fig. 5. In the example of Fig. 7, reception frequency 711 of a pulse wave with pulse interval 511, reception frequency 712 of a pulse wave with pulse interval 512, reception frequency 713 of a pulse wave with pulse interval 513, and reception frequency 714 of a pulse wave with pulse interval 514 are shown. Each pulse wave with pulse interval 511 is an example of each pulse wave included in the first class. Furthermore, each pulse wave with pulse intervals 512 to 514 is an example of each pulse wave included in the second class.

[0038] Subsequently, the determination unit 12 outputs information based on the determination result (step S103). Here, the determination unit 12 may display on the screen, for example, a graph image (PRI raster image) in which the reception time is on one axis and the PI or PRI is on the other axis, as shown in Figures 5 and 8. For example, in the PRI raster image of Figure 5, the determination unit 12 may display multiple pulse waves included in the same group pulse in the same display mode (for example, the same color or the same figure, etc.).

[0039] The determination unit 12 may calculate the pulse repetition interval of the group pulse based on the determination result of whether or not it is a group pulse. Then, the determination unit 12 may display information indicating the pulse repetition interval of the group pulse on a screen, for example, as shown in FIG.

[0040] The example of Fig. 8 shows an example of a PRI raster image of the group pulses of each pulse wave shown in Fig. 5. Fig. 8 also shows the reception times of each group pulse for the pulse repetition intervals (PRIs of group pulses) 811 to 813 of the group pulses. This allows, for example, a user (monitoring person) to identify the device 30 that is transmitting the group pulse by referring to a table (specification table) of the pulse repetition intervals of the group pulses transmitted by each transmission source device 30.

[0041] (Example of identifying the transmission source device 30) The determination unit 12 may identify the transmitter device 30 of the radar wave based on the pulse repetition interval of the group pulse. This makes it possible to provide the user with, for example, the names, etc. of the transmitter devices 30 present in the vicinity of the antenna 20. In this case, the determination unit 12 may display the names, etc. of the transmitter devices 30 using information from a table in which the names, etc. of the transmitter devices 30 are recorded in association with the pulse repetition interval of the group pulse. Note that the information in the table may be set in advance in the information processing device 10 by, for example, an operator.

[0042] In this case, the determination unit 12 may identify the transmission source device 30 that transmitted the radar wave based on the similarity between two-dimensional data indicating the pulse repetition interval of the group pulse and the time point at which each pulse wave is received, and two-dimensional data indicating predicted values ​​of the pulse repetition interval of the group pulse and the time point at which each pulse wave is received for the multiple transmission source devices 30. In this case, the determination unit 12 may generate a PRI raster image of the group pulse, for example, as shown in FIG. 8. Then, the determination unit 12 may generate a feature vector (sample vector) based on the PRI raster image of the group pulse using, for example, a machine learning result using deep learning or the like. Then, the determination unit 12 may identify the transmission source device 30 based on, for example, a comparison of the similarity (e.g., cosine similarity) between the sample vector and a template vector generated in advance. This allows the transmission source device 30 to be appropriately identified even when the PRI fluctuates due to fading such as Doppler or multipath in a real environment.

[0043] The determination unit 12 may also identify the transmission source device 30 that transmitted the radar wave based on the similarity between two-dimensional data indicating the pulse repetition interval of the group pulse and the time point at which each pulse wave was received, and two-dimensional data indicating the pulse repetition interval of the group pulse and the time point at which each pulse wave was received for each of the multiple transmission source devices 30. In this case, the determination unit 12 may, for example, calculate the similarity between the PRI raster image created in the process of step S103 and each PRI raster image created for each transmission source device 30. Note that the determination unit 12 may, for example, use a template matching score for each PRI raster image as the similarity. Note that the determination unit 12 may, for example, use SAD (Sum of Absolute Difference), SSD (Sum of Squared Difference), or NCC (Normalized Cross-Correlation) as a template matching method. Then, the determination unit 12 may, for example, identify the transmission source device 30 with the highest similarity.

[0044] Furthermore, the determination unit 12 may identify the transmission source device 30 of the radar wave based on the repetition pattern of the pulse repetition interval of the group pulse and the repetition interval of each pulse of the group pulse. This allows, for example, more appropriate determination of the transmission source device 30 present in the vicinity of the antenna 20. In this case, the determination unit 12 may display the name, etc. of the transmission source device 30 using information from a table in which the name, etc. of the transmission source device 30 is recorded in association with combinations of the repetition pattern of the pulse repetition interval of the group pulse and the repetition interval of each pulse of the group pulse. Note that the information in the table may be preset in the information processing device 10 by, for example, an operator.

[0045] Furthermore, the determination unit 12 may identify the transmission source device 30 of the radar wave based on the repetition pattern of the pulse repetition interval of the group pulse, the repetition interval of each pulse of the group pulse, and the pulse intervals between the multiple pulse waves included in the group pulse. This allows, for example, more appropriate determination of the transmission source device 30 present in the vicinity of the antenna 20. In this case, the determination unit 12 may display the name, etc. of the transmission source device 30 using information in a table in which the name, etc. of the transmission source device 30 is recorded in association with combinations of the repetition pattern of the pulse repetition interval of the group pulse, the repetition interval of each pulse of the group pulse, and the pulse intervals between the multiple pulse waves included in the group pulse. Note that the information in the table may be preset in the information processing device 10 by, for example, an operator.

[0046] <Modification> The information processing device 10 may be a device contained in a single housing, but the information processing device 10 of the present disclosure is not limited to this. Each unit of the information processing device 10 may be realized by cloud computing configured with one or more computers, for example. Furthermore, the information processing device 10 and the antenna 20 may be housed in the same housing and configured as an integrated information processing device. Such information processing devices 10 are also included in examples of the "information processing device" of the present disclosure.

[0047] Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the above-described embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure. Furthermore, each embodiment can be combined with other embodiments as appropriate.

[0048] Some or all of the above embodiments may also be described as, but are not limited to, the following appendices. Note that some or all of the elements (e.g., configurations and functions) described in each appendix dependent on appendix 1 may also be dependent on independent appendices in other categories in a similar dependency relationship. Some or all of the elements described in any appendix may be applied to various hardware, software, recording means for recording software, systems, and methods. (Appendix 1) an acquisition unit that acquires signals of each pulse wave of the radar wave received by the antenna at each time point; a determination unit that determines whether each of the pulse waves is a group pulse formed by combining a plurality of pulse waves, based on the reception frequency of each pulse interval, which is the time length until the next pulse wave of each of the pulse waves; An information processing device having the above. (Appendix 2) the determination unit classifies each of the pulse waves into a first class and a second class based on the pulse interval of each of the pulse waves, and determines whether or not the pulse waves included in the first class and the pulse waves included in the second class are group pulses based on the reception frequency of the pulse waves included in the first class and the reception frequency of the pulse waves included in the second class. 2. The information processing device according to claim 1. (Appendix 3) the determination unit determines that the pulse wave included in the first class and the pulse wave included in the second class are group pulses when a deviation between the reception frequency of the pulse wave included in the first class and the reception frequency of the pulse wave included in the second class is equal to or less than a threshold. 3. The information processing device according to claim 2. (Appendix 4) the determination unit classifies pulse waves having one pulse interval into the first class and pulse waves having other pulse intervals into the second class, and determines, based on the reception frequency of pulse waves included in the first class and the reception frequency of pulse waves included in the second class, whether or not the pulse waves included in the first class and the pulse waves included in the second class are group pulses in which the pulse repetition intervals of the group pulses are different and the pulse intervals between the plurality of pulse waves included in the group pulses are the same. 4. The information processing device according to claim 2 or 3. (Appendix 5) The first class has a smaller pulse interval than the second class. 5. The information processing device according to claim 4. (Appendix 6) the determination unit identifies the radar wave transmission source device based on the pulse repetition interval of the group pulse. 3. The information processing device according to claim 1 or 2. (Appendix 7) the determination unit identifies the device that is the source of the radar wave based on a repetition pattern of the pulse repetition intervals of the group pulses and each pulse repetition interval of the group pulses. 7. The information processing device according to claim 6. (Appendix 8) the determination unit identifies the device that is a source of the radar wave based on a repetition pattern of the pulse repetition intervals of the group pulses, the repetition intervals of each pulse of the group pulses, and the pulse intervals between the plurality of pulse waves included in the group pulses. 8. The information processing device according to claim 7. (Appendix 9) The signal of each pulse wave of the radar wave received by the antenna at each time is acquired, determining whether each pulse wave is a group pulse formed by combining a plurality of pulse waves based on the reception frequency for each pulse interval, which is the time length until the next pulse wave of each pulse wave; Information processing methods. (Appendix 10) The signal of each pulse wave of the radar wave received by the antenna at each time is acquired, determining whether each pulse wave is a group pulse formed by combining a plurality of pulse waves based on the reception frequency for each pulse interval, which is the time length until the next pulse wave of each pulse wave; A program that causes a computer to perform a process. [Explanation of symbols]

[0049] 1. Information Processing Systems 10. Information processing equipment 11 Acquisition Department 12 Judgment section 20 Antenna 30 Source Device

Claims

1. an acquisition unit that acquires signals of each pulse wave of the radar wave received by the antenna at each time point; a determination unit that determines whether each of the pulse waves is a group pulse formed by combining a plurality of pulse waves, based on the reception frequency of each pulse interval, which is the time length until the next pulse wave of each of the pulse waves; An information processing device having the above.

2. the determination unit classifies each of the pulse waves into a first class and a second class based on the pulse interval of each of the pulse waves, and determines whether or not the pulse waves included in the first class and the pulse waves included in the second class are group pulses based on the reception frequency of the pulse waves included in the first class and the reception frequency of the pulse waves included in the second class. The information processing device according to claim 1 .

3. the determination unit determines that the pulse wave included in the first class and the pulse wave included in the second class are group pulses when a deviation between the reception frequency of the pulse wave included in the first class and the reception frequency of the pulse wave included in the second class is equal to or less than a threshold value. The information processing device according to claim 2 .

4. the determination unit classifies pulse waves having one pulse interval into the first class and pulse waves having other multiple pulse intervals into the second class, and determines, based on the reception frequency of pulse waves included in the first class and the reception frequency of pulse waves included in the second class, whether or not the pulse waves included in the first class and the pulse waves included in the second class are group pulses in which the pulse repetition intervals of the group pulses are different and the pulse intervals between the multiple pulse waves included in the group pulses are the same.

4. The information processing device according to claim 2 or 3.

5. The first class has a pulse interval smaller than that of the second class. The information processing device according to claim 4 .

6. the determination unit identifies the radar wave transmission source device based on the pulse repetition interval of the group pulse.

3. The information processing device according to claim 1.

7. the determination unit identifies the device that is the source of the radar wave based on a repetition pattern of the pulse repetition intervals of the group pulses and each pulse repetition interval of the group pulses. The information processing device according to claim 6 .

8. the determination unit identifies the device that is a source of the radar wave based on a repetition pattern of the pulse repetition intervals of the group pulses, the repetition intervals of each pulse of the group pulses, and the pulse intervals between the plurality of pulse waves included in the group pulses. The information processing device according to claim 7 .

9. The signal of each pulse wave of the radar wave received by the antenna at each time is acquired, determining whether each pulse wave is a group pulse formed by combining a plurality of pulse waves based on the reception frequency for each pulse interval, which is the time length until the next pulse wave of each pulse wave; Information processing methods.

10. The signal of each pulse wave of the radar wave received by the antenna at each time is acquired, determining whether each pulse wave is a group pulse formed by combining a plurality of pulse waves based on the reception frequency for each pulse interval, which is the time length until the next pulse wave of each pulse wave; A program that causes a computer to perform a process.

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