JP7414671B2 - Analysis equipment, analysis method and program - Google Patents

Description

Embodiments of the present invention relate to an analysis device, an analysis method, and a program.

Frequency hopping (FH) is a technique for communicating by switching frequencies according to a fixed rule, and is a method of frequency spreading. Since FH communicates while switching frequencies, the influence of the presence of another signal on the frequency used for communication is limited, making it resistant to interference and interference. The transmitting side and the receiving side share rules such as a hopping sequence and a hopping pattern, and transmit and receive a frequency-hopped signal (hereinafter referred to as "FH signal") according to the hopping sequence. The hopping sequence defines the frequency used for communication, frequency switching timing, and the like.

Patent No. 4449615

However, in the conventional technology, when the temporal continuity of the FH signal is interrupted, it is not possible to separate the FH signal from the received signal without a hopping sequence.

The analysis device of the embodiment includes a detection section, an analysis section, a re-detection section, and a display control section. The detection unit detects a plurality of individual signals from the received signal. The analysis unit analyzes at least one of a signal length frequency distribution based on the signal length of the plurality of individual signals and a frequency frequency distribution based on the frequency of the plurality of individual signals to determine the characteristics of the FH (Frequency Hopping) signal. The FH signal is identified from the plurality of individual signals using the hopping information. The redetection unit redetects the FH signal from the received signal based on the hopping information, targeting an undetected section in which the FH signal is not detected. The display control section displays display information representing the FH signal included in the received signal on the display section.

FIG. 1 is a diagram showing an example of a functional configuration of an analysis device according to a first embodiment. FIG. 3 is a diagram showing an example of an FH signal and a non-FH signal according to the first embodiment. FIG. 3 is a diagram showing an example of signal length frequency distribution according to the first embodiment. FIG. 3 is a diagram showing an example of frequency frequency distribution according to the first embodiment. FIG. 3 is a diagram showing an example of an inter-frequency distance frequency distribution according to the first embodiment. FIG. 7 is a diagram showing an example of a functional configuration of an analysis device according to a second embodiment. 7 is a flowchart illustrating an example of redetection processing according to the second embodiment. FIG. 7 is a diagram showing an example 1 of the switching timing estimation method according to the second embodiment. FIG. 7 is a diagram illustrating a second example of the switching timing estimation method according to the second embodiment. FIG. 7 is a diagram illustrating an example of divided sections included in an undetected section according to the second embodiment. FIG. 2 is a diagram showing an example of the hardware configuration of the analysis apparatus of the first and second embodiments.

Embodiments of an analysis device, an analysis method, and a program will be described in detail below with reference to the accompanying drawings.

(First embodiment)
First, an example of the functional configuration of the analysis device according to the first embodiment will be described.

[Example of functional configuration]
FIG. 1 is a diagram showing an example of the functional configuration of an analysis device 10 according to the first embodiment. The analysis device 10 of the first embodiment includes a reception section 1, a detection section 2, an analysis section 3, a display control section 4, and a display section 5.

The receiving unit 1 receives a wideband signal including signals in a plurality of bands as a received signal.

The detection unit 1 detects a plurality of individual signals included in the received broadband signal, and inputs the detection information to the analysis unit 3. The detection information includes, for example, the start time, end time, signal length (time the signal continues), and frequency (carrier frequency of the signal) of the individual signal. Furthermore, an FH flag indicating whether each individual signal is an FH signal is added to the detection information by an analysis process performed by the analysis section 3 at the subsequent stage.

The analysis unit 3 analyzes at least one of the signal length frequency distribution based on the signal length of the plurality of individual signals and the frequency frequency distribution based on the frequency of the plurality of individual signals, and specifies the FH signal from the received signal. Specifically, the analysis unit 3 performs analysis processing on the detection information and estimates hopping information indicating the characteristics of the FH signal. The hopping information includes, for example, a hopping channel, a chip length (hop rate), a hopping channel interval, and the like.

A hopping channel is a frequency used for communicating FH signals. The hopping channel spacing is the spacing between each hopping channel.

The chip length (hop rate) is information that specifies the time interval at which hopping channels are switched. The chip length is the minimum unit that indicates the timing at which the frequency changes.

The analysis unit 3 determines whether each individual signal included in the detection information matches the characteristics of the FH signal based on the hopping information, and adds the above-mentioned FH flag to the detection information.

The display control unit 4 displays display information representing the FH signal included in the received signal on the display unit 5. For example, the display control unit 4 displays only the FH signal among the individual signals included in the received signal on the display unit 5 based on the FH flag of the detection information.

Next, details of the operation of the analysis device 10 of the first embodiment will be explained.

<Example of signal detection method>
The detection unit 2 converts a wideband signal into a spectrogram, for example, and scans the spectrogram in the frequency direction or the time direction. Then, the detection unit 2 detects the individual signal from the wideband signal by identifying the frequency and time indicating the location where there is a difference in power on the spectrogram. Specifically, the detection unit 2 detects individual signals from the wideband signal by identifying the frequency and time at which the power is equal to or greater than a threshold on the spectrogram.

Note that the method for detecting the individual signal from the broadband signal may be other than the exemplified method.

<Example of signal analysis method>
The analysis unit 3 estimates the hopping channel of the FH signal from the frequency frequency distribution described above. Furthermore, the analysis unit 3 estimates the time interval (chip length) at which the hopping channel of the FH signal switches from the signal length frequency described above.

In FH, the carrier frequency that carries the signal is switched to a predetermined frequency at a predetermined switching timing. Therefore, while the FH signal is being transmitted, multiple signals of the same length are generated. Also, multiple signals will be generated at specific frequencies. On the other hand, non-FH signals such as general signals and noise have no rules regarding signal length, frequency, etc.

<Example of individual signal>
FIG. 2 is a diagram showing an example of the FH signal and non-FH signal of the first embodiment. The individual signals detected from the wideband signal include FH signals and non-FH signals. Since the FH signal is a continuous signal on the time axis, the extinction time and the generation time are temporally connected. That is, it can be seen that signals that are not continuous on the time axis are not FH signals but non-FH signals.

<Example of signal length frequency distribution>
FIG. 3 is a diagram showing an example of the signal length frequency distribution of the first embodiment. The analysis unit 3 estimates the chip length of the FH signal from the signal length frequency distribution, and estimates the time interval at which the hopping channel switches from the chip length. Specifically, the analysis unit 3 estimates, for example, the most frequent signal length as the chip length of the FH signal. In this way, even if the broadband signal includes non-FH signals such as general signals and noise, the chip length of the FH signal can be estimated. In the example of FIG. 3, the most frequent (60 times) signal lengths 183 to 184 are estimated as the chip length.

<Example of frequency frequency distribution>
FIG. 4 is a diagram showing an example of frequency frequency distribution in the first embodiment. The analysis unit 3 estimates the hopping channel from the frequency frequency distribution. Specifically, the analysis unit 3 estimates, for example, a frequency where a signal appears with a frequency equal to or higher than a threshold value to be a hopping channel.

Furthermore, if the hopping channels are arranged at equal intervals on the frequency axis, the analysis unit 3 may estimate the hopping channel intervals. For example, after identifying the frequency at which the signal appears, the analysis unit 3 determines the distance between adjacent frequencies and estimates the hopping channel interval based on the frequency of the inter-frequency distance.

<Example of frequency distance frequency distribution>
FIG. 5 is a diagram showing an example of an inter-frequency distance frequency distribution according to the first embodiment. The analysis unit 3 estimates the hopping channel interval from an inter-frequency distance frequency distribution based on the distance between frequencies of a plurality of individual signals. Specifically, the analysis unit 3 estimates, for example, the frequency interval with the highest frequency as the hopping channel interval. Then, the analysis unit 3 estimates a frequency where a signal frequently appears at the same interval as the hopping channel interval to be a hopping channel. In this way, it is possible to prevent detection of hopping channels in which the number of occurrences of signals happens to be small and to be missed. Furthermore, it is possible to prevent a frequency in which a large number of signals occur to be mistakenly estimated as a hopping channel. In the example of FIG. 5, the most frequent (four times) inter-frequency distances 409 to 410 are estimated as the hopping channel spacing.

By performing analysis processing using the above-mentioned signal length frequency distribution, frequency frequency distribution, and frequency distance frequency distribution, even if the wideband signal contains general signals and non-FH signals such as noise, the FH signal can be extracted from the wideband signal. can be separated (extracted).

These analysis processes may be performed independently and simultaneously, or the results of one may be received and the other may be performed. For example, the analysis unit 3 estimates the chip length and uses the detection information to obtain information about a signal whose signal length is a constant multiple of the chip length (because when the same frequency is used at multiple switching timings, the signal length increases by a constant multiple). The hopping channel may be estimated after extracting only the channel.

Conversely, the analysis unit 3 may estimate the hopping channel, extract only the information of the signal whose frequency corresponds to the hopping channel from the detection information, and then estimate the chip length. In this way, the remaining hopping information can be estimated by excluding signals that do not match the previously estimated hopping information (chip length or hopping channel) and are unlikely to be FH signals, improving estimation accuracy. You can expect it.

For example, the analysis unit 3 simultaneously estimates the chip length and the hopping channel by identifying signals that have the same signal length and frequently appear in multiple frequencies from the two-dimensional frequency distribution of the signal length and frequency of the individual signals. You may.

As described above, the analysis unit 3 estimates the above-mentioned hopping information. Then, the analysis unit 3 uses the hopping information and the detection information to determine whether or not the individual signal is an FH signal, and adds an FH flag indicating the determination result to the detection information. The FH flag is, for example, 1 if it is an FH signal, and 0 if it is not an FH signal.

Note that since the same hopping channel may be used continuously in a plurality of chips, it is determined whether the signal length of the detection information matches a constant times the chip length of the hopping information.

That is, when the hopping channel of the hopping information and the frequency of the detection information match, and the signal length of the detection information matches a constant times the chip length of the hopping information, the analysis unit 3 determines whether the hopping channel corresponds to the detection information. The individual signal is determined to be an FH signal.

Furthermore, the signal length and hopping channel may not be determined strictly, but may be determined by allowing some error. In this way, it is possible to take into account some detection errors that depend on the detection accuracy and fluctuations between transmission and reception that depend on the communication environment.

<Example of how to display FH signal>
The display control unit 4 displays the signal whose FH flag of the detection information is 1 among the individual signals detected from the broadband signal on the display unit 5 as a detection result. For example, the display control unit 4 may convert the broadband signal into a spectrogram and display display information on the display unit 5 in which a marker is added to the FH signal included in the spectrogram. For example, the display control section 4 may frequency shift the individual FH signals so that the FH signals become one signal, and display display information represented by one signal on the display section 5.

As described above, in the analysis device 10 of the first embodiment, the analysis unit 3 calculates the signal length frequency distribution based on the signal lengths of the plurality of individual signals and the frequency frequency distribution based on the frequencies of the plurality of individual signals. At least one of the signals is analyzed to estimate hopping information indicating characteristics of the FH signal, and the hopping information is used to identify the FH signal from the plurality of individual signals. Then, the display control unit 4 displays display information representing the FH signal included in the received signal on the display unit 5.

As a result, according to the analysis device 10 of the first embodiment, even if the temporal continuity of the FH signal is interrupted, the FH signal can be separated (extracted) from the received signal using the estimated hopping information. . For example, even if a part of continuous FH signals cannot be detected, FH signals before and after the time when the FH signals could not be detected can be separated as signals from the same transmission source. Further, according to the analysis device 10 of the first embodiment, even if a hopping sequence is not obtained in advance, the FH Signals can be separated.

(Second embodiment)
Next, a second embodiment will be described. In the description of the second embodiment, descriptions similar to those in the first embodiment will be omitted, and points different from the first embodiment will be described. In the second embodiment, a case will be described in which the FH signal is re-detected when a part of the FH signal cannot be detected.

[Receiving device configuration]
FIG. 6 is a diagram showing an example of the functional configuration of the analysis device 10-2 of the second embodiment. The analysis device 10-2 of the second embodiment includes a reception section 1, a detection section 2, an analysis section 3, a display control section 4, a display section 5, and a redetection section 6. In the second embodiment, a redetection unit 6 is further added to the configuration of the first embodiment.

Below, the operation of the redetection unit 6 will be explained in detail.

The detection unit 2 detects each individual signal from the wideband signal received by the reception unit 1, but for some reason (for example, when the FH signal overlaps with the general signal, or when the power of the FH signal is small, etc.) A part of the FH signal may not be detected. When a part of the FH signal cannot be detected, the redetection unit 6 performs a redetection process for the FH signal that could not be detected.

Since the FH signal appears continuously in time while the FH signal is being transmitted, in the section where the FH signal is not detected (hereinafter referred to as the "undetected section"), there is no FH signal on any hopping channel. There will be a signal. The received data including the FH signal in the undetected section is input from the detection section 2 to the re-detection section 6 via the analysis section 3 together with, for example, the above-mentioned detection information. The redetection unit 6 identifies an undetected section in which no FH signal is detected based on the detection information. Then, the redetection unit 6 uses the hopping information estimated by the analysis unit 3 to perform redetection processing of the FH signal in the undetected section included in the received signal.

Note that the analysis unit 3 estimates the hopping information from the detection information output by the detection unit 2, but the hopping information can be estimated even if the detection information does not include a part of the FH signal that originally exists. Specifically, the detection unit 2 detects a sufficient number of FH signals (for example, a sufficient number for statistical analysis) to separate FH signals and non-FH signals (for example, general signals and noise) based on signal length, frequency, etc. As long as you can do it.

<Example of re-detection process>
FIG. 7 is a flowchart illustrating an example of redetection processing according to the second embodiment. First, specifically, the redetection unit 6 identifies an undetected section based on the time when the FH signal is detected (step S1). The method for specifying the undetected section may be implemented in any manner. For example, a detection flag may be prepared that is set to 1 if an FH signal is detected for times 0 to T of the wideband signal to be processed, and set to 0 if not detected. When this detection flag is used, the detection unit 2 sets the detection flag to 1 between the start time and the end time of a signal whose FH flag is 1 for detection information.

Next, the redetection unit 6 divides the undetected section (step S2). Specifically, first, the re-detection unit 6 estimates the chip switching timing and divides the undetected section at the switching timing.

<Example 1 of switching timing estimation method>
FIG. 8 is a diagram showing an example 1 of the switching timing estimation method according to the second embodiment. In the example of FIG. 8, the re-detection unit 6 selects a reference individual signal (for example, an individual signal whose signal length matches the chip length) from among the individual signals whose FH flag is 1 included in the detection information. Select as signal 100. The redetection unit 6 estimates that the chips are switched at intervals of the chip length based on the reference signal 100. Note that if a plurality of individual signals can be selected as candidates for the reference signal 100, the redetection unit 6 estimates the switching timing using each of the plurality of individual signals as the reference signal 100, and selects the switching timing at which estimation is most concentrated, for example. You may choose.

<Example 2 of switching timing estimation method>
FIG. 9 is a diagram illustrating a second example of the switching timing estimation method according to the second embodiment. In the example of FIG. 9, the redetection unit 6 identifies a time Ta at which switching of the hopping channel occurs before the undetected interval, and a time Tb at which switching of the hopping channel occurs after the undetected interval. . Next, the redetection unit 6 calculates how many chips are present in the section Tb-Ta using n=round((Tb-Ta)/cLen). Here, cLen indicates the chip length, and round() indicates rounding processing (truncating processing below the decimal point). In the example of FIG. 9, the number n of chips existing in the section Tb-Ta is six.

The redetection unit 6 estimates the chip switching timing in the interval Tb-Ta based on the number n of chips existing in the interval Tb-Ta.

In the examples of FIGS. 8 and 9, a case is shown in which a plurality of chips are consecutively undetected, but the length of the undetected section is indefinite. In addition to the cases shown in FIGS. 8 and 9, there are cases where only one chip length is undetected, and cases where a part of the chip is undetected. Generally, the undetected section includes a divided section in which a chip length of one chip is not detected, or a divided section in which a part of chips is undetected.

Therefore, in order to perform the re-detection process in units of one chip, the undetected section is divided into lengths of one chip or less in the process of step S2. If the chip switching timing can be estimated, the undetected section can be divided into one chip or less according to the switching timing. For example, in the examples of FIGS. 8 and 9, the undetected section is divided into every 0.5 chips, and one chip is represented by two divided sections.

<Example of division of undetected section>
FIG. 10 is a diagram illustrating an example of divided sections included in the undetected section according to the second embodiment. Non-detection of less than one chip can occur only at the beginning and end of the entire non-detection section. Therefore, the redetection unit 6 determines that one chip is not detected in any section other than the first or last individual section of the undetected sections.

As for a specific determination method, for example, if the length of the first (last) section of the undetected section is smaller than the threshold determined based on the chip length, the redetection unit 6 detects the length of the first (last) section of the undetected section. ) is determined to be less than one chip undetected, and if it is equal to or greater than the threshold, the first (last) of the undetected intervals is determined to be one chip undetected. Note that the threshold value may be set to an arbitrary value based on the detection accuracy of the signal length, for example. Specifically, the threshold value is, for example, a value of 0.8 to 1.2 times the signal length, taking into account fluctuations in the detected signal length.

For example, if the total length of the signal detected immediately before the undetected section and the length of the first section of the undetected section is one chip, the redetection unit 6 detects the undetected signal. The first section of the section is determined to be less than one chip undetected. For example, if the total length of the signal detected immediately after the undetected interval and the length of the last interval of the undetected interval is one chip, the redetection unit 6 detects the undetected The last section of the section is determined to be less than one chip undetected.

Returning to FIG. 7, the re-detection unit 6 determines whether the divided section to be determined, among the divided sections included in the undetected section, is one chip undetected or less than one chip undetected. (Step S3).

If the divided section is undetected for one chip (Step S3, Yes), the redetection unit 6 executes redetection processing for one chip (Step S4-1). Specifically, the re-detection unit 6 detects the FH signal again from the divided sections of one chip, limited to the hopping channel.

Here, the re-detection method is not limited to a specific method, but since the detection unit 2 has not been able to detect it, it is undetected, so a re-detection method that is more sensitive than the detection method by the detection unit 2 is desirable. Possible re-detection methods include, for example, a method that makes it easier to detect local power changes by comparing the time of one chip before and after the undetected section and the surrounding frequencies.

Note that if signals are detected in a plurality of channels, the redetection unit 6 selects one of the detected signals. For example, the re-detection unit 6 selects a signal (for example, a signal with a difference in characteristics smaller than a threshold) that has characteristics similar to the characteristics (for example, power and bandwidth) of the FH signal detected so far. For example, since the signal to be redetected is a signal with low sensitivity that could not be detected by the detection unit 2, the redetection unit 6 selects the signal of the channel having the largest power difference with the surrounding signal.

The redetection unit 6 adds the start time, end time, signal length and frequency of the redetected signal, and the FH flag to the detection information. At this time, the FH flag may be set to 1, or may be set to a previously unused value. By setting an unused value to the FH flag, it is possible to distinguish between a signal that has been detected from the beginning and a signal that has been detected again.

If less than 1 chip is not detected in the divided section (step S3, No), the redetection unit 6 executes a redetection process for less than 1 chip (step S4-2). Specifically, the re-detection unit 6 modifies the detection information of the signal detected immediately before or after the divided section of less than one chip. If less than one chip is not detected, it is considered that the chip immediately before or after it is partially undetected, so the detection information of the chip immediately before or after it is corrected.

Specifically, if the undetected portion of the signal detected immediately before the divided section to be redetected is a signal that was redetected in the divided section, the redetection unit 6 detects the undetected portion of the signal detected immediately before. The end time is replaced with the end time of the divided section. In addition, if the undetected portion of the signal detected immediately after the divided section to be redetected is a signal that was redetected in the divided section to be redetected, the redetection unit 6 detects the signal detected immediately after the divided section to be redetected. The start time of is replaced with the start time of the corresponding divided section.

In addition, the re-detection unit 6 converts the start time, end time, signal length and frequency of the re-detected signal, and the FH flag into detection information, as in the case of a divided section in which one chip worth of signals is not detected. You may add additional information. At this time, the FH flag is set to a previously unused value. By setting an unused value to the FH flag, a signal detected by the detection unit 2 with a length shorter than one chip can be identified.

Next, the redetection unit 4 determines whether there is an unprocessed divided section (step S5). If there is an unprocessed divided section (step S5, Yes), the process returns to step S3. If there is no unprocessed divided section (step S5, No), the process ends.

As described above, the redetection unit 6 estimates the switching timing at which the hopping channel of the FH signal switches based on the hopping information, divides the undetected section into a plurality of divided sections based on the switching timing, and The FH signal will be detected again. For example, the redetection unit 6 uses a redetection method that is more sensitive than the detection method used by the detection unit 2 to redetect the FH signal for each divided section.

Returning to FIG. 6, the display control unit 4 displays display information including the re-detection result by the re-detection unit 6 on the display unit 5. At this time, if the FH flag of the signal re-detected by the re-detecting unit 6 is set to a value different from the detection result of the detecting unit 2, the display control unit 4 displays display information so that the re-detected signal can be identified. Display.

According to the analysis device 10-2 of the second embodiment, even when a part of the FH signal cannot be detected (for example, when the FH signal overlaps with the general signal, when the power of the FH signal is small, etc.), the estimation can be performed. The FH signal can be re-detected based on the hopping information. Furthermore, according to the analysis device 10-2 of the second embodiment, it is possible to present the time and frequency at which some FH signals that could not be detected by the detection unit 2 exist.

As described above, according to the first and second embodiments, even if the hopping sequence is not obtained in advance, the wideband received signal including the FH signal and non-FH signal (for example, general signal and noise) , the FH signal can be separated (extracted).

The wideband signal input to the analysis device 10 (10-2) of the first and second embodiments may be stored in a memory such as a ring buffer, and analyzed while sequentially receiving the signal. In this way, real-time processing can be performed while shifting the time of the received signal, and the FH signal can be separated (extracted) after a certain delay. Furthermore, an already recorded broadband signal may be input to the analysis device 10 (10-2) of the first and second embodiments. In this way, the FH signal can be separated from the pre-recorded broadband signal.

The analysis device 10 (10-2) of the first and second embodiments may have each function implemented by a program and may be implemented by a CPU (Central Processing Unit) or the like, or may be implemented by dedicated hardware. .

Finally, an example of the hardware configuration of the analysis device 10 (10-2) of the first and second embodiments will be described.

[Example of hardware configuration]
FIG. 11 is a diagram showing an example of the hardware configuration of the analysis device 10 (10-2) of the first and second embodiments.

The analysis device 10 is a computer that includes a control device 301, a main storage device 302, an auxiliary storage device 303, a display device 304, an input device 305, and a communication device 306. The control device 301, main storage device 302, auxiliary storage device 303, display device 304, input device 305, and communication device 306 are connected via a bus 310.

The control device 301 executes the program read from the auxiliary storage device 303 to the main storage device 302. The main storage device 302 is a memory such as ROM (Read Only Memory) and RAM (Random Access Memory). The auxiliary storage device 303 is an HDD (Hard Disk Drive), an SSD (Solid State Drive), a memory card, or the like.

Display device 304 displays display information. The display device 304 is, for example, a liquid crystal display. The input device 305 is an interface for operating a computer. The input device 305 is, for example, a keyboard or a mouse. When the computer is a smart device such as a tablet terminal, the display device 304 and the input device 305 are, for example, touch panels.

Communication device 306 is an interface for communicating with other devices. Note that the analysis device 10 does not need to include the display device 304 and the input device 305, and the display function and input function of an external terminal that can communicate via the communication device 306 may be used.

A program executed on a computer is an installable or executable file recorded on a computer-readable storage medium such as a CD-ROM, memory card, CD-R, or DVD (Digital Versatile Disc). Provided as a computer program product.

Alternatively, a program executed on a computer may be stored on a computer connected to a network such as the Internet, and provided by being downloaded via the network. Further, the program may be configured to be provided via a network such as the Internet without downloading the program to be executed on the computer.

Further, a program to be executed by a computer may be provided by being pre-installed in a ROM or the like.

The program executed by the computer has a module configuration that includes functional blocks that can also be realized by a program among the functional configurations (functional blocks) of the analysis device 10 described above. As actual hardware, each functional block is loaded onto the main storage device 302 when the control device 301 reads and executes a program from a storage medium. That is, each functional block described above is generated on the main storage device 302.

Note that some or all of the functional blocks described above may not be implemented by software, but may be implemented by hardware such as an IC (Integrated Circuit).

Further, when each function is realized using a plurality of processors, each processor may realize one of each function, or may realize two or more of each function.

Furthermore, the operating mode of the computer that implements the analysis device 10 may be arbitrary. For example, the analysis device 10 may be realized by one computer. Furthermore, for example, the analysis device 10 may be operated as a cloud system on a network.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

For example, the receiving unit 1 of the analysis device 10 (10-2) of the first and second embodiments is realized by an external device, and the analysis device 10 (10-2) receives reception data of a wideband signal from the external device, The hopping information analyzed by the analysis device 10 (10-2) may be output to the external device. Further, for example, the display unit 5 of the analysis device 10 (10-2) of the first and second embodiments is realized by an external device, and the analysis device 10 (10-2) outputs the above-mentioned display information to the external device. You can.

1 Receiving section 2 Detection section 3 Analysis section 4 Display control section 5 Display section 6 Re-detection section 10 Analysis device 301 Control device 302 Main storage device 303 Auxiliary storage device 304 Display device 305 Input device 306 Communication device 310 Bus

Claims (9)

a detection unit that detects multiple individual signals from the received signal;
Analyzing at least one of a signal length frequency distribution based on the signal length of the plurality of individual signals and a frequency frequency distribution based on the frequency of the plurality of individual signals to obtain hopping information indicating characteristics of an FH (Frequency Hopping) signal. an analysis unit that estimates and uses the hopping information to identify the FH signal from the plurality of individual signals;
a redetection unit that redetects the FH signal from the received signal based on the hopping information, targeting an undetected section where the FH signal is not detected;
a display control unit that displays display information representing the FH signal included in the received signal on a display unit;
An analysis device equipped with. The hopping information includes a hopping channel of the FH signal,
the analysis unit estimates the hopping channel from the frequency frequency distribution;
The analysis device according to claim 1. The hopping information includes a time interval at which the hopping channel of the FH signal switches,
The analysis unit estimates a chip length of the FH signal from the signal length frequency distribution, and estimates the time interval from the chip length.
The analysis device according to claim 1 or 2. The hopping information includes hopping channel spacing of the FH signal,
The analysis unit further analyzes an inter-frequency distance frequency distribution based on distances between frequencies of the plurality of individual signals, and estimates the hopping channel interval from the inter-frequency distance frequency distribution.
An analysis device according to any one of claims 1 to 3. a receiving unit that receives a wideband signal including signals in a plurality of bands as the received signal;
The analysis device according to any one of claims 1 to 4, further comprising: The re-detection unit estimates a switching timing at which the hopping channel of the FH signal is switched based on the hopping information, divides the undetected section into a plurality of divided sections based on the switching timing, and performs a process for each divided section. , re-detecting the FH signal;
An analysis device according to any one of claims 1 to 5 . The re-detection unit re-detects the FH signal for each divided section using a re-detection method that is more sensitive than the detection method used by the detection unit.
The analysis device according to claim 6 . an analysis device detecting a plurality of individual signals from the received signal;
The analysis device analyzes at least one of a signal length frequency distribution based on the signal lengths of the plurality of individual signals and a frequency frequency distribution based on the frequencies of the plurality of individual signals to determine the characteristics of the FH (Frequency Hopping) signal. estimating hopping information indicating the FH signal and using the hopping information to identify the FH signal from the plurality of individual signals;
The analyzing device re-detects the FH signal from the received signal based on the hopping information, targeting an undetected section where the FH signal is not detected;
a step in which the analysis device displays display information representing the FH signal included in the received signal on a display unit;
analysis methods including computer,
a detection unit that detects multiple individual signals from the received signal;
Analyzing at least one of a signal length frequency distribution based on the signal length of the plurality of individual signals and a frequency frequency distribution based on the frequency of the plurality of individual signals to obtain hopping information indicating characteristics of an FH (Frequency Hopping) signal. an analysis unit that estimates and uses the hopping information to identify the FH signal from the plurality of individual signals;
a redetection unit that redetects the FH signal from the received signal based on the hopping information, targeting an undetected section where the FH signal is not detected;
a display control unit that displays display information representing the FH signal included in the received signal on a display unit;
A program to function as

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