JP7309814B2 - Radio wave interference monitor device and radio wave interference monitor method - Google Patents

Description

The present invention relates to a radio wave interference monitoring device and a radio wave interference monitoring method for visualizing and monitoring the directions of arrival of a plurality of radio signals of the same frequency band and the state of mutual radio wave interference at each location in space.

The next-generation communication standard 5G has begun to be put into practical use, and in order to meet the wide-ranging needs of 5G, various entities such as local governments and local companies are considering local 5G that can be flexibly constructed and used. .

Among these, in order to cope with the further rapid increase in mobile traffic, the application of InBand Full-Duplex (hereinafter referred to as IBFD), which is a highly efficient frequency utilization technology, is under consideration.

Ideally, IBFD can double the frequency utilization efficiency compared to the existing duplex system, but there is a problem that a lot of interference is newly generated, and various amounts of interference are obtained, resulting in Therefore, a control technology is required to determine whether IBFD is applicable. In order to realize this, it is necessary to grasp the radio conditions of, for example, 5G wireless terminals or terminals of various standards in space and time, and to measure the interference conditions of radio waves emitted into space from multiple terminals at high speed and with high accuracy. Monitoring technology is required, and as part of that, a system for estimating the direction of arrival of electromagnetic waves at an arbitrary point is required.

As a conventional system for estimating the direction of arrival, for example, a system that estimates the direction of arrival of an electromagnetic wave based on signals received at the same position from a plurality of antennas that respectively receive three orthogonally polarized signals (for example, Patent Document 1 etc.) are known.

Japanese Patent Application Laid-Open No. 2021-96191

In the radio wave direction-of-arrival estimation system described in Patent Document 1, for example, three antennas are sequentially moved to the same measurement position, and the electric field strength is obtained at the stage of sequentially acquiring each received signal. Based on the electric field intensity, the direction of arrival of the radio wave is estimated by applying a search method such as the beamformer method or the MUSIC method.

In this conventional radio wave direction-of-arrival estimation system, signals from a plurality of signal sources are separated from the received signal at the measurement position, the direction of arrival for each signal from each of the separated signal sources, and various information other than the direction of arrival. It does not specify how to obtain characteristics such as electric field intensity, sweep spectrum, etc. In order to understand the state of radio wave interference in space, the obtained direction of arrival and other characteristics are separated according to the measurement position. There was also no disclosure of visualizing and displaying each wireless signal (signal source).

For this reason, in the conventional radio wave direction-of-arrival estimation system, the radio conditions of the above-mentioned terminals of various standards in the space of a certain area are grasped, and the interference condition of the radio waves emitted into the space from a plurality of terminals is calculated, for example, as follows: Interference monitoring technology that measures the direction of arrival and other characteristics of each signal source at high speed and accuracy cannot be realized, and monitoring of complex wireless communication environments useful for accurately determining the applicability of IBFD is difficult. was extremely difficult to do.

On the other hand, in recent years, there has been a demand for an interference monitoring technique in an environment in which a plurality of radio stations transmit and receive radio signals in the same frequency band, for example. In particular, in the above environment, a plurality of radio signals (same frequency) that are mixed and propagated from each radio station as a signal source are separated, and the direction of arrival of each radio signal at various places in the environment, and There is a strong demand for the ability to display other characteristics in an easy-to-read manner.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such conventional problems. An object of the present invention is to provide a radio interference monitoring device and a radio interference monitoring method that can be easily grasped and can easily realize observation of a complicated radio communication environment.

In order to solve the above problems, a radio wave interference monitoring device according to claim 1 of the present invention provides radio waves in a predetermined space (6) in which a plurality of signal sources (110) transmit and receive radio signals of the same frequency band. A radio wave interference monitor for displaying interference information, comprising a receiving unit (10, 21, 22) for receiving the mixed radio signal at a plurality of measurement points within the predetermined space; Perform signal separation processing to separate signals transmitted from any one of the plurality of signal sources from the mixed radio signal, and perform signal separation processing for signals transmitted from each of the separated signal sources. Analysis processing units (23, 24, 25) that perform analysis processing for each analysis item of direction estimation, constellation, and sweep spectrum; A database (32) that stores the analysis result of each of the analysis items performed by the analysis processing unit at the measurement point in association with the position information, and based on the analysis result of the electric field intensity stored in the database, the A heat map generation unit (43) for generating a heat map corresponding to each of the plurality of signal sources by performing an electric field intensity interpolation process for points other than the measurement points, and a map area defining the predetermined space. (51) and a display unit (34) for displaying a monitor screen (50) having (51); A direction-of-arrival map that is a result of direction-of-arrival estimation is displayed on the display unit for each of the plurality of signal sources, one of the direction-of-arrival maps displayed for each of the plurality of signal sources is selected, and the analysis items and When one of the heat maps is selected, the display control unit further displays the analysis result for each of the analysis items corresponding to the desired position and the heat map generation result as the radio wave interference information on the display unit. (45) and.

With this configuration, the radio wave interference monitoring device according to claim 1 of the present invention defines a predetermined space when performing radio wave interference monitoring in a predetermined space in which a plurality of signal sources transmit and receive radio signals in the same frequency band. By designating an arbitrary point on a monitor screen having a map area, it is possible to selectively and easily confirm radio wave interference information for each signal source corresponding to the designated arbitrary position. As radio wave interference information, it is possible to confirm each analysis item such as electric field intensity, direction of arrival estimation, constellation, and sweep spectrum. Further, according to the configuration having the function of performing the interpolation processing, it is possible to check the radio wave interference information (heat map) for points other than the measurement point where the actual measurement was performed. This makes it possible to easily observe a complicated wireless communication environment, which is difficult to implement with existing measuring instruments and measurement systems.

In addition, the radio interference monitoring apparatus according to claim 2 of the present invention further comprises setting means (41) for setting a frequency band to be monitored for radio interference, wherein the analysis processing unit receives from each of the plurality of signal sources The configuration may be such that the analysis processing for each of the analysis items is performed on the transmitted signal of the frequency band set by the setting means.

With this configuration, the radio interference monitoring device according to claim 2 of the present invention can easily monitor the state of mutual interference of radio signals in the frequency band by setting a desired frequency band for radio interference monitoring. It becomes possible.

Further, in the radio interference monitor device according to claim 3 of the present invention, the setting means is configured to set any one of 3.7 GHz band, 4.7 GHz band, and 28 GHz band as the frequency band for radio interference monitoring. may be

With this configuration, the radio wave interference monitoring device according to claim 3 of the present invention selectively sets any one of the 3.7 GHz band, 4.7 GHz band, and 28 GHz band, and Mutual interference state of radio signals can be monitored.

In order to solve the above problems, a radio wave interference monitoring method according to claim 4 of the present invention uses the radio wave interference monitor device according to any one of claims 1 to 3, wherein a plurality of signal sources (110) are the same. A radio wave interference monitoring method for displaying radio wave interference information in a predetermined space (6) for transmitting and receiving radio signals in a frequency band, wherein the mixed radio signals are detected while moving a plurality of measurement points within the predetermined space. a receiving step (S1, S2) for receiving the mixed radio signal received in the receiving step, performing a signal separation process for separating a signal transmitted from any one of the plurality of signal sources from the mixed radio signal, an analysis processing step (S3) for performing analysis processing on each analysis item of field strength, direction-of-arrival estimation, constellation, and sweep spectrum for signals transmitted from each of the plurality of separated signal sources; a step (S4) of storing in a database (32) the analysis result of each of the analysis items performed in the analysis processing step of (1) in association with position information of the measurement point in the predetermined space stored in advance; A monitor having a step (S6) of generating a heat map corresponding to each of the plurality of signal sources based on the analysis results of the electric field intensity stored in a database, and a map region (51) defining the predetermined space. Displaying the screen (50), in response to an operation of sequentially specifying an arbitrary position in the map area, the direction-of-arrival diagram for each of the separated signal sources, each of the analysis items, and the heat map, the specified arbitrary and a step (S8) of further displaying the analysis result for each of the analysis items corresponding to the position of and the generation result of the heat map as radio wave interference information.

With this configuration, the radio interference monitoring method according to claim 4 of the present invention is a radio interference monitoring device to which the radio interference monitoring method is applied, wherein a plurality of signal sources transmit and receive radio signals in the same frequency band. When monitoring radio wave interference between radio signals transmitted from multiple signal sources in space, by specifying an arbitrary point on a monitor screen that has a map area that defines a predetermined space, the specified arbitrary point Radio wave interference information for each signal source corresponding to a position can be selectively and easily confirmed. As radio wave interference information, it is possible to confirm each analysis item such as electric field intensity, direction of arrival estimation, constellation, and sweep spectrum. Further, according to the configuration having the function of performing the interpolation processing, it is possible to check the radio wave interference information (heat map) for points other than the measurement point where the actual measurement was performed. This makes it possible to easily observe a complicated wireless communication environment, which is difficult to implement with existing measuring instruments and measurement systems.

INDUSTRIAL APPLICABILITY The present invention makes it possible to easily grasp mutual interference of radio signals at various points in space in an environment where multiple signal sources transmit and receive radio signals in the same frequency band, and to easily realize observation of a complicated radio communication environment. A radio wave interference monitoring device and a radio wave interference monitoring method can be provided.

FIG. 2 is a conceptual diagram for explaining the current wireless environment targeted for radio wave interference monitoring; FIG. 3 is a conceptual diagram showing a radio interference measurement procedure for a plurality of measurement points within a radio interference monitoring target area of the radio interference monitor device according to the embodiment of the present invention. 1 is a block diagram showing the functional configuration of a radio wave interference monitor according to one embodiment of the present invention; FIG. 4 is a flow chart showing radio interference monitor processing operation of the radio interference monitor device according to the embodiment of the present invention. 5 is a flow chart showing the radio interference information display processing operation in step S8 of FIG. 4 of the radio interference monitor device according to the embodiment of the present invention. FIG. 5 is a diagram showing a display example of a basic monitor screen used for monitoring the state of radio wave interference in the radio wave interference monitoring device according to the embodiment of the present invention; FIG. 4A is an enlarged view of a direction-of-arrival diagram displayed in accordance with the operation of the basic monitor screen in the radio wave interference monitoring device according to the embodiment of the present invention, and FIG. An example is shown, and (b) shows an example when the direction of arrival of the signal is 90 degrees. FIG. 4 is a diagram showing a display form of a sweep spectrum confirmation screen that can be transitioned from a basic monitor screen in the radio wave interference monitoring device according to the embodiment of the present invention; FIG. 10 is a diagram showing a display form of a heat map confirmation screen that can be transitioned from the basic monitor screen in the radio interference monitor device according to the embodiment of the present invention; FIG. 4 is a diagram showing a display form of a constellation confirmation screen that can be transitioned from a basic monitor screen in the radio wave interference monitoring device according to the embodiment of the present invention;

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a radio wave interference monitoring device and a radio wave interference monitoring method according to the present invention will be described below with reference to the drawings.

(overview)
First, an overview of a radio wave interference monitoring device according to the present invention and a radio wave interference monitoring method using the same will be described with reference to FIGS. 1 and 2. FIG.

Among current interference monitoring techniques, for example, there is a technique for monitoring a radio environment having the configuration shown in FIG. In the wireless environment shown in FIG. 1, solid lines with arrows represent communication signals, and dotted lines with arrows represent wireless signals that cause interference conditions.

In FIG. 1, terminal A1 and terminal A2 located within the radio service area of base station A0 are in communication with each other (not shown) via base station A0, and are within the radio service area of base station B0. A radio environment is assumed in which a terminal B1 and a terminal B2 located in the same area are in communication with each other (not shown) via the base station B0. In such a radio environment, for example, base stations A0 and B0, and terminals A1, A2, B1, and B2 are signal sources, and signals transmitted from each signal source have complex interference conditions at various locations. may occur.

Regarding interference monitoring technology targeting a complex wireless communication environment as shown in Fig. 1, conventionally, there is a method of receiving wireless signals at multiple measurement points in a certain area and estimating the direction of arrival. However, it was not possible to separate the signal transmitted from one of multiple signal sources mixed at each measurement point, estimate the direction of arrival, and observe the estimated result of the direction of arrival corresponding to each measurement point. rice field. In addition, with conventional interference monitoring technology, it is also considered that multiple analysis items such as the field strength of the signal transmitted from each signal source corresponding to each measurement point and the sweep spectrum are displayed so that they can be easily confirmed. It wasn't.

On the other hand, the radio wave interference monitoring device 1 according to the present invention includes, for example, as shown in FIG. The inside of the space is targeted for monitoring. The signal sources A, B, C, and D are assumed to be base stations, mobile terminals, etc. that transmit and receive radio signals in the same frequency band.

In the radio interference monitor device 1 according to the present invention that performs radio interference monitoring for the radio interference monitor area 6, a plurality of points in the space of the radio interference monitor area 6 are defined as measurement points for measuring incoming signals. , movement a, movement b, movement c, movement d, and movement e indicated by dotted line arrows, the radio signal is measured while sequentially moving between these plurality of measurement points, and the analysis results are collected.

Furthermore, in the radio wave interference monitoring device 1 according to the present invention, radio waves of a plurality of analysis items (including direction of arrival of radio waves) that serve as indicators for monitoring the state of radio wave interference by analyzing analysis results of radio signals collected at each measurement point Interference information is generated and, if necessary, radio wave interference information for multiple analysis items at each measurement point (or its adjacent points) is displayed.

In the radio wave interference monitor device 1 according to the present invention, for example, the display control of the radio wave interference information corresponding to each point in the space of the radio wave interference monitor area 6 shown in FIG. ) and confirmation screens for each analysis item that can be transitioned from the basic monitor screen 50 (see FIGS. 7 to 10), for example, for each analysis item such as direction of arrival estimation, sweep spectrum, heat map, constellation radio wave interference information corresponding to the point in question is visualized and displayed. The basic monitor screen 50 constitutes the monitor screen of the present invention.

Next, the configuration of the radio interference monitor device 1 according to one embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 3, the radio wave interference monitoring device 1 according to this embodiment includes an antenna device 10, an interference monitoring device 20, and a data processing device 30. As shown in FIG.

The antenna device 10 receives mixed radio signals transmitted from a plurality of signal sources 110 at various locations within a predetermined space forming the radio interference monitor area 6 (see FIG. 2). As a specific configuration of the antenna device 10, for example, a configuration in which three antennas each capable of receiving three orthogonal polarized waves as described in Patent Document 1 are rotated by a rotating body as a plurality of antenna elements, Alternatively, there is a configuration in which each antenna element of the array antenna is made up of a plurality of antenna elements.

The radio interference monitor device 1 according to the present embodiment provides the antenna device 10 with incoming signals coming from the surrounding radio environment, that is, mixed radio signals transmitted from a plurality of signal sources 110 within the radio interference monitor area 6. are received by a plurality of antenna elements, and the signals received by each antenna element are processed by the interference monitoring device 20 and the data processing device 30, thereby separating the signals transmitted from each signal source 110 and separating each signal source 110 In addition to estimating the direction of arrival of the signal transmitted from the signal source 110, various characteristics such as the electric field strength of each signal source 110 are measured.

Further, the radio interference monitor device 1 according to the present embodiment can be used, for example, in a local 5G environment, and the frequency bands of incoming signals to be captured are, for example, 4.6 GHz to 4.8 GHz and 28.0 GHz. Bands such as 2 GHz to 29.1 GHz are envisioned. The radio wave interference monitor device 1 is not limited to use in a local 5G environment, but can also be used in other wireless systems such as WiFi.

In addition, in the radio interference monitor device 1, the antenna device 10 is not limited to the configuration described above. Antenna type, number, arrangement, driving method, direction of arrival, as long as the direction of arrival and various characteristics can be comprehensively acquired against inter-terminal interference between areas and inter-base station interference in the above frequency bands. Various methods can be applied for the estimation method and the like.

The interference monitoring device 20 has a frequency converter 21, an AD converter 22, a signal separator 23, a direction-of-arrival estimation processor 24, and a signal analyzer 25, as shown in FIG.

The frequency converter 21 receives a received signal (radio signal) received by the antenna device 10 and performs processing to convert the received signal into an intermediate frequency band signal (IF signal).

The AD converter 22 converts the received signal frequency-converted by the frequency converter 21 from an analog signal to a digital signal, and outputs the digital signal to the signal separator 23 . The AD converter 22 constitutes a receiver 20 a together with the antenna device 10 and the frequency converter 21 .

The signal separation unit 23 selects one of the plurality of signal sources 110 from the digital signal input from the AD conversion unit 22, that is, the mixed radio signal at each measurement point in the predetermined space of the radio interference monitor area 6 described above. performs signal separation processing to separate the signals transmitted from the

The direction-of-arrival estimation processing unit 24 inputs the signals separated by the signal separation unit 23 (arriving signals from each signal source 110 to the measurement point), and performs signal processing for estimating the direction of arrival of each incoming signal. conduct. In this signal processing, for example, the beamformer method, the MUSIC method, the ESPRIT method, etc. are applied as algorithms for estimating the direction of arrival.

The signal analysis unit 25 receives the signal separated by the signal separation unit 23 (arriving signal at the measurement point) and performs signal processing to analyze the items required for radio interference monitoring on the incoming signal. do. Items to be analyzed (analysis items) include, for example, electric field intensity, sweep spectrum, constellation, and the like. The signal analysis unit 25 constitutes the analysis processing unit 20b together with the signal separation unit 23 and the direction-of-arrival estimation processing unit 24 described above.

The interference monitoring device 20 includes the frequency conversion unit 21, the AD conversion unit 22, the signal separation unit 23, the direction-of-arrival estimation processing unit 24, and the signal analysis unit 25 having the configurations described above. measuring radio signals while moving a plurality of measurement points in a space, collecting the measurement results of the radio signals at each measurement point, and targeting the collected measurement results of the radio signals for each measurement point The direction of arrival of the incoming signal arriving at the measurement point is estimated and the state of radio wave interference is analyzed.

The data processing device 30 is implemented by, for example, a PC (personal computer), and performs data processing to generate information (radio interference information) for monitoring radio wave interference based on the analysis result of the received signal in the interference monitoring device 20. I do. The data processing device 30 includes a control section 31 , a database 32 , an input section 33 and a display section 34 .

The control unit 31 is configured by, for example, a computer device. This computer device includes a CPU (Central Processing Unit) that performs predetermined information processing for realizing the functions of the radio wave interference monitor device 1, overall control of the antenna device 10 and the interference monitoring device 20, and a CPU. Non-volatile memory such as ROM (Read Only Memory) or HDD (Hard Disc Drive) that stores OS (Operating System) for booting, other programs, parameters for control, etc., OS and applications used by CPU for operation It has a RAM (random access memory) for storing execution codes, data, and the like.

The computer device described above functions as the control unit 31 by the CPU executing a program stored in a non-volatile memory such as a ROM or HDD using the RAM as a work area. Specifically, in the control unit 31, the CPU executes each program stored in the non-volatile memory in the work area of the RAM, so that the monitor condition setting unit 41, the antenna control unit 42, the heat Each function of the map generation unit 43, the interpolation processing unit 44, and the display control unit 45 is realized. Here, the monitor condition setting unit 41 and the antenna control unit 42 constitute a function unit as a device control unit 31a that controls the interference monitoring device 20, and the heat map generation unit 43, the interpolation processing unit 44, and the display control unit 45 It constitutes a functional unit as a data control unit 31b that performs data processing such as generating radio wave interference information based on the analysis result of the received signal in the interference monitoring device 20. FIG.

The monitor condition setting unit 41 is a functional unit for setting the monitoring conditions for the state of radio wave interference in the radio wave interference monitor area 6. For example, the monitor condition setting unit 41 can set the frequency of the radio signal to be monitored for the state of radio wave interference. and constitutes the setting means of the present invention. The monitor condition setting unit 41 may be configured to set any one of the 3.7 GHz band, 4.7 GHz band, and 28 GHz band as the frequency band for radio wave interference monitoring, for example, considering the operation of 5G. The heat map generation unit 43 performs processing for generating radio wave interference information reflecting interference of radio signals in the frequency band set by the monitor condition setting unit 41 .

The antenna control unit 42 performs mechanical control such as the antenna direction in the antenna device 10 .

The heat map generation unit 43 uses the signal analysis unit 25 to analyze the electric field intensity of the signal transmitted from each signal source 110 separated by the signal separation unit 23 in the interference monitoring device 20, and the signal source 110. Processing for generating a heat map (2D electric field strength: electric field strength represented on a two-dimensional plane) corresponding to each is performed. The generated heat map (see FIG. 9) is stored in the database 32 as radio wave interference information. In order to enable the above-described heat map generation processing, in the interference monitoring device 20, prior to the heat map generation processing, the signal separation unit 23 separates the mixed radio signals at each measurement point from one of the plurality of signal sources 110 , and the signal analysis unit 25 analyzes the electric field intensity of the signal transmitted from any one of the signal sources 110 .

In particular, regarding the generation of the radio wave interference information described above, the interference monitoring device 20 has a processing function of generating the radio wave interference information to which the position information of the measurement point input from the input unit 33 is added for each of the signal sources 110. are doing. Note that position information obtained by a positioning sensor may be used instead of the input from the input unit 33 as the position information of the measurement point.

When the heat map generation unit 43 generates the heat map, the interpolation processing unit 44 calculates the value of the electric field strength of each signal at the predetermined measurement point in the radio interference monitor area 6 stored in the database 32 from the value of the electric field strength of the measurement point. Interpolation processing is performed to calculate the value of the electric field strength at points other than the above and output the calculated value of the electric field strength. As an algorithm for interpolation processing, for example, nearest neighbor interpolation, bilinear interpolation, bicubic interpolation, etc. are applied. The heat map generation unit 43 generates the heat map based on the measured values of the electric field strength at the predetermined measurement points stored in the database 32 and the electric field strength values at points other than the measurement points calculated by the interpolation process. to generate

The display control unit 45 displays the basic monitor screen 50 (see FIG. 6) having a map area that defines the radio interference monitor area 6 on the display unit 34, and in response to an operation to specify an arbitrary position in the map area, It is a functional unit that performs display control for displaying on the display unit 34 the radio wave interference information generated corresponding to the specified position in the radio wave interference monitor area 6 . In the configuration of the basic monitor screen 50 shown in FIG. 6, the radio interference monitor area display area 51 constitutes the map area.

The database 32 is a functional unit for storing radio wave interference information (including a heat map), which is analysis result data collected and analyzed by the interference monitoring device 20 .

The input unit 33 is a functional unit for inputting various information such as commands, and is composed of input devices such as a keyboard and a mouse. In the present embodiment, the input unit 33 may have a function (function as an operation unit) for inputting frequency setting related to direction-of-arrival estimation processing and start or end of radio wave interference monitoring processing.

The display unit 34 is a functional unit that displays various types of information such as input screens for the various types of information and measurement results. In this embodiment, the display unit 34 has a function of displaying various screens (see FIGS. 6 to 10) for radio wave interference monitoring. The display unit 34 may be configured with a touch panel or the like to enable input of setting parameters, commands, and the like.

Next, the radio interference monitor processing operation of the radio interference monitor device 1 according to this embodiment will be described with reference to the flowchart shown in FIG.

To start this radio interference monitor process, the radio interference monitor device 1 is moved to the first measurement point within the radio interference monitor area 6 (step S1).

After arriving at the first measurement point of the destination, when a predetermined start operation relating to radio interference monitoring processing is performed in the input unit 33 of the data processing device 30, the radio interference monitoring device 1 starts the device control unit of the data processing device 30. 31a controls the antenna device 10 and the interference monitoring device 20 to receive radio signals (step S2).

Here, in the data processing device 30, the antenna control unit 42 performs control necessary for estimating the direction of arrival with respect to the antenna device 10. FIG. In accordance with this, the device control unit 31a causes the antenna device 10 to receive a radio signal in a frequency band preset by the monitor condition setting unit 41, and performs interference monitoring so as to measure the radio signal in the frequency band based on the received signal. It drives and controls the device 20 . By this drive control, in the interference monitoring device 20, the signal received by the antenna device 10 at the measurement point is frequency-converted by the frequency converter 21, and the radio signal after the frequency conversion is converted from an analog signal to a digital signal by the AD converter 22. , and input to the signal separator 23 . The signal separation unit 23 separates a plurality of signal source components arriving from the surroundings of the measurement point from the input radio signal, and sends the separated signal source components to the direction-of-arrival estimation processing unit 24 and the signal analysis unit 25. input.

Subsequently, the interference monitoring device 20 performs analysis processing for analyzing the radio signal measured as described above under the control of the device control section 31a (step S3). Here, the direction-of-arrival estimation processing unit 24 performs a process of estimating the direction of arrival for each radio signal that is separated and input, that is, for each mixed radio signal received at the measurement point. direction estimation result) to the data processing device 30 . Regarding direction-of-arrival estimation processing, for example, a search method as described in Patent Document 1 is applied in a state in which a radio signal (signal source component) transmitted from one of a plurality of signal sources 110 is separated. The direction of arrival of radio waves can be estimated for each signal source 110 . The signal analysis unit 25 also performs processing for analyzing analysis items required for radio interference monitoring for each radio signal that is separated and input, and outputs the analysis result to the data processing device 30 .

After performing the analysis processing (signal separation, direction-of-arrival estimation, and analysis) of the radio signal in step S3, the device control unit 31a captures the analysis results (direction-of-arrival estimation results and analysis results) of the analysis processing in step S3. , is stored in the database 32 as analysis result data of mixed radio signals transmitted from each signal source 110 at the measurement point (step S4). At this time, the device control section 31a stores the analysis result data in the database 32 in association with the position information at the measurement point in the radio interference monitor area 6. FIG. Here, the database 32 may have a configuration in which position information of each measurement point within the radio interference monitor area 6 is recorded in advance.

Furthermore, the heat map generation unit 43 checks whether or not the next measurement point exists (step S5). As a specific example, in the heat map generation unit 43, for example, a command from the input unit 33 by the user indicating that the next measurement point exists, or a command indicating that the next measurement point does not exist (or It checks whether or not the next measurement point exists depending on whether any command has been issued. If it is determined that the next measurement point exists here (YES in step S5), the radio interference monitor device 1 is moved to the next measurement point (step S1), and then the above-described steps S2 to S5 are performed. to continue. Thereafter, while it is determined that the next measurement point exists (YES in step S5), the processing of steps S1 to S5 is continued, and if it is determined that the next measurement point does not exist (NO in step S5). goes to step S6.

In step S6, the heat map generation unit 43 uses the interpolation processing unit 44 for points other than the measurement points based on the analysis result of the electric field intensity among the analysis result data stored in the database 32 so far. A heat map corresponding to each of the plurality of signal sources 110 is generated by interpolating the electric field intensity (step S6).

In the electric field strength interpolation process in step S6, the interpolation processing unit 44 calculates the electric field strength values at points other than the measurement points from the measured electric field strength values of the above-mentioned signals at predetermined measurement points in the radio interference monitor area 6. Calculate

After generating the above-described heat map and radio wave interference information for each analysis item, for example, when a predetermined display start operation for displaying radio wave interference information in the input unit 33 is received, the display control unit 45 causes each signal The analysis result data for each measurement point of the source 110 is read from the database 32 (step S7), and the radio wave interference information generated corresponding to each measurement point and measurement interpolation point is displayed on the display unit 34, for example, as shown in FIG. Control is performed to display using the basic monitor screen 50 as shown (step S8).

During the execution of the radio interference information display control in step S8, the basic monitor screen 50 can be closed in response to a predetermined end operation on the input unit 33, and a series of radio interference monitor processing operations can be terminated.

Next, the radio interference information display processing operation in step S8 in FIG. 4 of the radio interference monitor device 1 according to this embodiment will be described in detail with reference to the flowchart shown in FIG.

The radio wave interference information display process in FIG. 5 is started by receiving a predetermined display process start operation at the input unit 33, for example. When receiving the display processing start operation, the display control unit 45 first displays the basic monitor screen 50 used for the radio wave interference monitor on the display unit 34 (step S21).

As shown in FIG. 6, the basic monitor screen 50 is divided into an area image 51a imitating the radio interference monitor area 6 (for example, a planar arrangement image of the radio interference monitoring target area according to the procedure shown in FIG. 2) and a grid. It has a radio wave interference monitor area display area 51 on which a lattice map image 51b is superimposed, and an operation section area 52 for performing various operations. The operation section area 52 is a section for performing operations related to various commands, etc. In this example, the operation section area 52 is composed of a functional section for performing instruction operations for enlarging or reducing the information displayed in the radio wave interference monitor area display area 51. there is It goes without saying that the operation section area 52 may be configured to have other operation functions.

In the radio interference monitor area display area 51, for example, a position corresponding to an arbitrary point within the radio interference monitor area 6 can be selectively designated from the input unit 33 with respect to the lattice map image 51b. there is The display control unit 45, in response to an operation to specify an arbitrary position on the lattice map image 51b from the input unit 33, separates each signal from the signals arriving at the specified position within the radio wave interference monitor area 6. Radio wave interference information regarding the signal transmitted from the source 110 is displayed on the display section 34 . However, if the specified position is a position corresponding to a point other than the above-described default measurement point, the displayed radio wave interference information is limited to a heat map.

On the basic monitor screen 50, intersections of vertical and horizontal lines (dotted lines) forming the lattice map image 51b correspond to predetermined measurement points in the radio interference monitor area 6 (see step S1 in FIG. 5). As a result, in the radio wave interference monitor device 1 according to the present embodiment, by specifying a position corresponding to the intersection of the lattice map image 51b from the input unit 33, radio wave interference information regarding the signal arriving at the specified position can be obtained. It can be confirmed on the basic monitor screen 50 .

Furthermore, in the radio interference monitor device 1, even if a point (non-measurement point) other than the measurement point within the radio interference monitor area 6 is designated, the signal source separated from the signal arriving at the designated non-measurement point Radio wave interference information (however, limited to a heat map) regarding components can be confirmed on the basic monitor screen 50 .

In order to realize this, the control section 31 of the data processing device 30 is provided with an interpolation processing section 44 . When the heat map generation unit 43 generates a heat map, the interpolation processing unit 44 calculates the electric field strength at a point other than the measurement point from the measured value of the electric field strength of each separated signal (signal source component) at the predetermined measurement point. , and has an interpolation processing function of outputting the calculated electric field strength value. The radio wave interference information whose values can be interpolated by the interpolation processing unit 44 is limited to the heat map. As a result, with the radio wave interference monitor device 1 according to the present embodiment, it is possible to check the heat map on the basic monitor screen 50 even for points corresponding to non-measurement points in the radio wave interference monitor area 6 (see FIG. 2). It becomes possible.

When the basic monitor screen 50 having the screen structure described above is displayed on the display unit 34 (step S21), if the user wants to check the state of radio wave interference, the user can confirm the desired state on the radio wave interference monitor area display area 51. An operation is performed to specify the requested point (step S22).

When the confirmation request point is designated, the display control unit 45 determines whether the requested point has been reached based on the analysis result data corresponding to the designated request point among the analysis result data stored in the database 32. A direction-of-arrival diagram 53 for each signal source showing the direction of arrival of radio signals transmitted from each of the separated signal sources 110 is superimposed on the radio wave interference monitor area display area 51 and displayed (step S23).

Here, the direction-of-arrival diagram for each signal source 53 will be described in detail with reference to FIG. FIG. 7 is an enlarged view of the direction-of-arrival diagram 53 for each signal source, and (a) shows an example when the direction of arrival of the signal transmitted from the signal source 110 at the request point is 0 degrees, (b) similarly shows an example when the direction of arrival is 90 degrees. As shown in FIG. 7, the direction-of-arrival diagram for each signal source 53 is an azimuth circle diagram 61a that defines a 360-degree azimuth (circle) centered at the measurement point. It has a screen structure that displays a received power graph 61b that expresses the received power of the azimuth with a continuous line (cloud-shaped line) in the circumferential direction. In the received power graph 61b, the magnitude of the received power is expressed by the distance from the center of the circle to the end in the circumferential direction, and the greater the distance from the center, the greater the power. The azimuth with the maximum received power is the direction of arrival of the incoming signal, and the direction of arrival is indicated by an arrow 61c. That is, the direction-of-arrival diagram 53 for each signal source expresses that the incoming signal is arriving from the direction indicated by the arrow 61c, and the angle of the azimuth of the direction of arrival is aligned with the direction-of-arrival column 61d. It is designed to display.

FIG. 6 shows a display example of the direction-of-arrival diagram 53 for each signal source when two radio signals respectively transmitted from two signal sources 110 arrive at the confirmation request point indicated by symbol Po1. In this signal source direction-of-arrival diagram 53, a direction-of-arrival diagram 53a corresponding to the first radio signal (signal source 110) shown in FIG. A direction-of-arrival map 53b corresponding to the signal source 110 of .

Referring to FIG. 7(a), the first signal source 110 displayed in the left area of the direction-of-arrival diagram for each signal source 53 is located directly above the diagram, that is, at "0 degree" in the azimuth circle diagram 61a. It can be determined that the light is coming from a specified direction. Further, referring to FIG. 7B, the second signal source 110 displayed in the right area of the direction-of-arrival diagram for each signal source 53 is displayed on the right side of the diagram, that is, "90 degrees" in the azimuth circle diagram 61a. It can be determined that it is coming from the azimuth specified in .

On the basic monitor screen 50 shown in FIG. 6, an operation is performed to select either the direction-of-arrival diagram 53a displayed in the left area of the direction-of-arrival diagram 53 for each signal source or the direction-of-arrival diagram 53b displayed in the right area. , the radio wave interference information of the signal source 110 corresponding to the selected direction-of-arrival diagram 53a or 53b is displayed on the basic monitor screen 50 for confirmation. The radio wave interference information is not limited to being displayed on the basic monitor screen 50, and may be displayed using, for example, a multi-window that increases the number of display windows each time an item is selected. According to the configuration of displaying using multiple windows, it is possible to visually compare all the previously selected radio interference information without erasing the previously selected radio interference information.

Returning to FIG. 5 again, the radio wave interference information display processing will be described. When confirming the radio wave interference information of any one of the signal sources 110 while the direction-of-arrival diagram for each signal source 53 is displayed in step S23, the user selects the desired signal source 110 in the direction-of-arrival diagram for each signal source 53. Either direction-of-arrival map 53a or 53b is selected (step S24).

By accepting the selection of the direction-of-arrival map 53a or 53b, the display control unit 45 displays a selection menu of radio wave interference information regarding the signal source 110 corresponding to the selected direction-of-arrival map (step S25). The selection menu is configured so that each analysis item of radio interference information (sweep spectrum, heat map, constellation, etc.) can be selected.

Accordingly, when one of the analysis items corresponding to the desired signal source 110 is selected from the selection menu in step S25, the display control unit 45 displays the analysis result data of the selected analysis item. Control is performed to read out from the database 32 and display it on the display unit 34 as radio wave interference information (step S26).

Here, when the analysis item selected in step S25 is, for example, a sweep spectrum, a heat map, or a constellation, the display control unit 45 displays the data in the manner shown in FIGS. Control to display radio wave interference information for analysis items.

According to the series of radio wave interference information display control shown in FIG. 5, a basic monitor screen 50 having a radio wave interference monitor area display area (map area) 51 defining a predetermined space is displayed, and any position or separation of the map area is displayed. In response to the operation of sequentially specifying the direction-of-arrival diagram 53 for each signal source 110, each analysis item, and the heat map, the analysis result for each analysis item and the heat map generation result corresponding to the specified arbitrary position are further transmitted by radio waves. It can be displayed as interference information. As a result, by specifying an arbitrary position in the map area, the radio wave interference information of each analysis item corresponding to the plurality of signal sources 110 at the arbitrary position is selectively visualized and displayed for easy confirmation. becomes possible.

Next, specific display forms of radio interference information in the radio interference monitor device 1 according to this embodiment will be described with reference to FIGS. 8 to 10. FIG.

In the display control of the radio wave interference information in step S26 of FIG. 5, the display control unit 45 displays the sweep spectrum shown in FIG. The spectrum confirmation screen 62 is used to visually display the sweep spectrum. The sweep spectrum may be displayed using multiple windows or the like, as described above.

As shown in FIG. 8, the sweep spectrum confirmation screen 62 has a waveform display area 62a and a common data display area 62b. The waveform display area 62a is an area for displaying the sweep spectrum waveform of the signal source 110 corresponding to the measurement point. In the waveform display area 62a, an area for displaying information related to the analysis of the signal source 110 is provided around the display area of the sweep spectrum waveform, and setting data such as RBW is displayed in this area. The common data display area 62b has, for example, fields such as "Frequency and Time", "Level", and "Trigger", and each field displays setting data corresponding to the field.

In step S26, the display control unit 45 displays the heat map confirmation screen 63 shown in FIG. Visualize the heat map using

As shown in FIG. 9, the heat map confirmation screen 63 has a screen structure in which an area image 63a, a lattice map image 63b, and a radio wave condition image 63c are superimposed and displayed in a see-through state. The area image 63a corresponds to, for example, the area image 51a forming the radio interference monitor area display area 51 of the basic monitor screen 50 (see FIG. 6), and the lattice map image 63b similarly corresponds to the lattice map image 51b. It is equivalent. The radio wave condition image 63c is designed to display the electric field strength of the incoming signal within the radio wave interference monitor area 6 by color gradation. Here, the electric field strength of the incoming signal is such that, for example, the darker the color, the stronger the electric field strength.

In this way, the heat map confirmation screen 63 displays the incoming signal within the radio interference monitor area 6 by the radio wave condition image 63c on the area image 63a that simulates the radio interference monitor area 6 where a plurality of measurement points are located. The electric field strength distribution can be displayed by color gradation. The structural difference between the heat map confirmation screen 63 and the basic monitor screen 50 is that the former has the function of displaying the electric field intensity (radio wave condition image 63c) and the latter does not have the function of displaying the electric field intensity. . The heat map is not limited to being displayed using the heat map confirmation screen 63, and may be displayed together with other radio wave interference information using multiple windows.

10 on the basic monitor screen 50 in step S26 in accordance with the selection of the analysis item "constellation" in step S25 of FIG. Visualize the constellation using

As shown in FIG. 10, the constellation confirmation screen 64 has a graph display area 64a, in which analysis results regarding the constellation of incoming signals arriving at the measurement point are displayed. ing.

As described above, the radio interference monitor device 1 according to the present embodiment has a plurality of signal sources 110 within a predetermined space of the radio interference monitor area 6 in which the plurality of signal sources 110 transmit and receive radio signals in the same frequency band. A radio wave interference monitoring device that displays radio wave interference information between radio signals separated for each signal source from mixed radio signals transmitted from and a signal separation unit 23 that performs signal separation processing to separate a signal transmitted from one of a plurality of signal sources 110 from mixed radio signals at each measurement point, and a signal separation unit 23 A direction-of-arrival estimating unit 24 for estimating the direction of arrival of signals transmitted from each of the plurality of signal sources 110 separated in , and a signal analyzing unit 25 for performing analysis processing on each analysis item of field strength, constellation, and sweep spectrum. Then, the position information at the measurement point in a predetermined space is recorded in advance, and the analysis processing section 20b (composed of the signal separation section 23, the direction-of-arrival estimation section 24, and the signal analysis section 25) at the measurement point performs Based on the database 32 that stores the analysis results of each analysis item in association with the position information, and the analysis results of the electric field strength stored in the database 32, the electric field strength is interpolated for points other than the measurement points. , a display that displays a basic monitor screen 50 having a heat map generator 43 that generates a heat map corresponding to each of a plurality of signal sources 110, and a radio wave interference monitor area display area (map area) 51 that defines a predetermined space. A direction-of-arrival map, which is the result of direction-of-arrival estimation performed by the analysis processing unit 20b corresponding to an arbitrary position, is displayed for each of the plurality of signal sources 110 in response to an operation of designating an arbitrary position in the map area. When one of the direction-of-arrival diagrams 53a and 53b displayed on the unit 34 and displayed for each of the plurality of signal sources 110 is selected, and one of the analysis items and the heat map is selected, analysis corresponding to any desired position is performed. and a display control unit 45 for further displaying the analysis result for each item and the heat map generation result as radio wave interference information on the display unit 34 .

With this configuration, the radio interference monitor device 1 according to the present embodiment is configured such that the plurality of signal sources 110 transmit and receive radio signals in the same frequency band within a predetermined space of the radio interference monitor area 6. By specifying an arbitrary point on the basic monitor screen 50 having a map area that defines a predetermined space, each signal corresponding to the designated arbitrary position Radio interference information for each source 110 can be selectively and easily confirmed. As radio wave interference information, it is possible to confirm each analysis item such as electric field intensity, direction of arrival estimation, constellation, and sweep spectrum. Further, according to the configuration of the radio wave interference monitor device 1 having the function of performing the above interpolation processing, it is possible to check the radio wave interference information (heat map) for points other than the measurement point where the actual measurement was performed. This makes it possible to easily observe a complicated wireless communication environment, which is difficult to implement with existing measuring instruments and measurement systems.

Further, the radio interference monitor device 1 according to the present embodiment further includes a monitor condition setting unit 41 for setting the frequency band to be monitored for radio interference, and the analysis processing unit 20b receives signals transmitted from each of the signal sources 110. It is configured to perform analysis processing for each analysis item on the signal in the frequency band set by the monitor condition setting unit 41 .

With this configuration, the radio interference monitor device 1 according to the present embodiment can easily monitor the state of mutual interference between radio signals in the frequency band by setting a desired frequency band to be monitored for radio interference. Become.

Further, in the radio interference monitor device 1 according to the present embodiment, the monitor condition setting unit 41 is configured to set any one of the 3.7 GHz band, 4.7 GHz band, and 28 GHz band as the frequency band for radio interference monitoring. be.

With this configuration, the radio wave interference monitor device 1 according to the present embodiment selectively sets any one of the 3.7 GHz band, 4.7 GHz band, and 28 GHz band, for example, and uses the set frequency band. Mutual interference state of radio signals can be monitored.

Further, the radio wave interference monitoring method according to the present embodiment detects radio waves between radio signals transmitted from a plurality of signal sources 110 in a predetermined space in which the plurality of signal sources 110 transmit and receive radio signals in the same frequency band. It displays interference information.

The radio wave interference monitoring method according to the present embodiment includes receiving steps (S1 and S2) of receiving mixed radio signals while moving a plurality of measurement points within a predetermined space, and receiving mixed radio signals received in the receiving step. , signal separation processing is performed to separate the signal transmitted from any of the plurality of signal sources 110, and the field strength, direction of arrival estimation, and constellation of the signal transmitted from each of the separated plurality of signal sources 110 are obtained. The analysis results of each analysis item performed in the analysis processing step (S3) for performing analysis processing for each analysis item of the measurement and sweep spectrum and the analysis processing step at the measurement point are measured in a predetermined space stored in advance. A step of storing in the database 32 in association with the location information of the point (S4), and a step of generating a heat map corresponding to each of the plurality of signal sources 110 based on the analysis result of the electric field strength stored in the database 32 (S6). ) and a radio wave interference monitor area display area (map area) 51 that defines a predetermined space. a step (S8) of further displaying the analysis result for each analysis item and the heat map generation result corresponding to the specified arbitrary position as radio wave interference information in response to the operation of sequentially designating the analysis item and the heat map; have a configuration that includes

With this configuration, in the radio interference monitoring device 1 to which the radio interference monitoring method according to the present embodiment is applied, the plurality of signal sources 110 transmit and receive radio signals in the same frequency band within a predetermined space. 110, by designating an arbitrary point on the basic monitor screen 50 having a map area that defines a predetermined space, each corresponding to the designated arbitrary position Radio interference information for each signal source 110 can be selectively and easily confirmed. As radio wave interference information, it is possible to confirm each analysis item such as electric field intensity, direction of arrival estimation, constellation, and sweep spectrum. Further, according to the configuration having the function of performing the interpolation processing, it is possible to check the radio wave interference information (heat map) for points other than the measurement point where the actual measurement was performed. This makes it possible to easily observe a complicated wireless communication environment, which is difficult to implement with existing measuring instruments and measurement systems.

As described above, the radio wave interference monitoring device and the radio wave interference monitoring method according to the present invention facilitate mutual interference of radio signals in various places in space in an environment in which a plurality of signal sources transmit and receive radio signals in the same frequency band. Radio interference monitoring device and radio interference monitoring method for monitoring mutual interference between multiple radio signals in the same frequency band, with the effect of being able to easily grasp a complex radio communication environment. Generally useful.

1 Radio interference monitor device 6 Radio interference monitor area (space)
10 Antenna device (receiving unit)
20 interference monitoring device 21 frequency converter (receiving unit)
22 AD converter (receiving unit)
24 direction-of-arrival estimation processing unit (analysis processing unit)
25 signal analysis unit (analysis processing unit)
30 data processing device 32 database 34 display unit 41 monitor condition setting unit (setting means)
43 heat map generator 44 interpolation processor 45 display controller 50 basic monitor screen (monitor screen)
51 Radio interference monitor area display area (map area)
53 Direction of arrival diagram for each signal source 53a, 53b Direction of arrival diagram 62 Sweep spectrum confirmation screen 63 Heat map confirmation screen 64 Constellation confirmation screen 110 Signal sources A, B, C, D

Claims (4)

A radio wave interference monitor that displays radio wave interference information in a predetermined space (6) in which a plurality of signal sources (110) transmit and receive radio signals of the same frequency band,
receiving units (10, 21, 22) for receiving mixed radio signals transmitted from the plurality of signal sources at a plurality of measurement points within the predetermined space;
performing signal separation processing for separating a signal transmitted from one of the plurality of signal sources from the mixed radio signals at each of the measurement points, and a signal transmitted from each of the separated signal sources; Analysis processing units (23, 24, 25) that perform analysis processing for each analysis item of electric field intensity, direction of arrival estimation, constellation, and sweep spectrum for
A database (32 )and,
A heat map corresponding to each of the plurality of signal sources is generated by performing interpolation processing of the electric field strength for points other than the measurement points based on the analysis results of the electric field strength stored in the database. a map generator (43);
a display unit (34) for displaying a monitor screen (50) having a map area (51) defining the predetermined space;
A direction-of-arrival map, which is a result of the direction-of-arrival estimation performed by the analysis processing unit corresponding to the arbitrary position, is displayed for each of the plurality of signal sources in response to an operation of designating an arbitrary position in the map area. displayed in the
When one of the direction-of-arrival diagrams displayed for each of the plurality of signal sources is selected, and one of the analysis item and the heat map is selected, analysis is performed for each of the analysis items corresponding to the desired arbitrary position. a display control unit (45) for further displaying the result and the heat map generation result as the radio wave interference information on the display unit;
A radio wave interference monitor, comprising: further comprising setting means (41) for setting a frequency band to be monitored for radio wave interference;
2. The apparatus according to claim 1, wherein said analysis processing unit performs analysis processing for each of said analysis items on signals in frequency bands set by said setting means transmitted from each of said plurality of signal sources. Radio interference monitor device as described. 3. The radio interference monitor apparatus according to claim 2, wherein said setting means sets any one of a 3.7 GHz band, a 4.7 GHz band and a 28 GHz band as the frequency band for radio interference monitoring. Display of radio interference information in a predetermined space (6) where a plurality of signal sources (110) transmit and receive radio signals in the same frequency band using the radio interference monitor device according to any one of claims 1 to 3. A radio wave interference monitoring method for
a receiving step (S1, S2) of receiving mixed radio signals transmitted from the plurality of signal sources while moving a plurality of measurement points within the predetermined space;
performing signal separation processing for separating signals transmitted from any one of the plurality of signal sources from the mixed radio signals received in the receiving step;
an analysis processing step (S3) for performing analysis processing on each analysis item of field strength, direction-of-arrival estimation, constellation, and sweep spectrum for signals transmitted from each of the plurality of signal sources that have undergone signal separation;
A step of storing in a database (32) the analysis result of each of the analysis items performed in the analysis processing step at the measurement point in association with pre-stored position information of the measurement point within the predetermined space (S4 )and,
generating a heat map corresponding to each of the plurality of signal sources based on the analysis result of the electric field intensity stored in the database (S6);
Displaying a monitor screen (50) having a map area (51) defining the predetermined space, an arbitrary position of the map area, the arrival direction diagram for each of the separated signal sources, each of the analysis items, and the heat a step (S8) of further displaying the analysis result for each of the analysis items corresponding to the specified arbitrary position and the heat map generation result as radio wave interference information in response to an operation of sequentially specifying maps;
A radio wave interference monitoring method comprising:

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