KR102283695B1 - Method and apparatus for displaying frequency spectrum in radio monitoring system - Google Patents

Abstract

The present invention is to display a frequency spectrum in a radio wave measurement system, and an operating method of the radio wave measurement system includes detecting a frequency spectrum of a received signal, and calculating power values for each spectrum bin based on the frequency spectrum. mapping the power values for each spectral bin to bitmaps corresponding to frequency bins, counting the number of times a value appears for each pixel position in bitmaps accumulated during a specified time period, and and outputting a screen representing the frequency spectrum based on the screen.

Description

METHOD AND APPARATUS FOR DISPLAYING FREQUENCY SPECTRUM IN RADIO MONITORING SYSTEM

The present invention relates to a radio wave measurement system, and to a method and apparatus for displaying a frequency spectrum in a radio wave measurement system.

Radio waves are also called radio waves, and are a kind of electromagnetic waves generated according to the flow of electric and magnetic fields. Radio waves are widely used as a means for signal transmission in broadcasting systems such as radio and television, radar, navigation, computer networks, communication systems such as mobile phones, medical devices, industrial control devices, and the like. Moreover, due to the rapid development of wireless communication technology in recent years, a very large number of radio waves are used in real life. For example, cellular communication base stations, wireless LAN access points (APs), etc. that can be easily found in the vicinity perform wireless communication using radio waves.

As the number of various systems using radio waves increases, the radio wave use environment becomes more complex, and interference problems between the systems may occur. To counter this problem, radio wave measurements are needed. For example, when constructing a new wireless network or installing a new base station, a network designer may design a cell or set a base station to minimize interference based on data obtained through radio wave measurement. In addition, even when a wireless network is being operated, radio wave measurement may be performed to monitor the use state of the frequency band.

An object of the present invention is to provide a method and apparatus for more effectively displaying a frequency spectrum measured in a radio wave measurement system.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

According to an embodiment of the present invention, a method of operating a radio wave measurement system includes detecting a frequency spectrum of a received signal, calculating power values for each spectrum bin based on the frequency spectrum, the spectrum bin Mapping star power values to bitmaps corresponding to frequency bins, counting activation times for each pixel position in bitmaps accumulated for a specified time period, and a screen representing the frequency spectrum based on the times outputting , wherein one frequency bin may correspond to a plurality of spectral bins, and the one frequency bin may correspond to one bitmap to which power values of the plurality of spectral bins are all mapped.

According to an embodiment of the present invention, the one bitmap includes a plurality of pixels expressing a power value using a location, and among the plurality of pixels, only pixels at a location corresponding to the power values are selected. can be activated.

According to an embodiment of the present invention, the one bitmap includes a plurality of pixels expressing a power value using a location, and among the plurality of pixels, a first bitmap corresponding to a maximum value among the power values. A pixel and a second pixel corresponding to the minimum value may be activated, and all pixels between the first pixel and the second pixel may be activated.

According to an embodiment of the present invention, the one bitmap includes a plurality of pixels expressing a power value using a location, and among the plurality of pixels, a first bitmap corresponding to a maximum value among the power values. A second pixel corresponding to a pixel and a minimum value is activated, and among the plurality of pixels, a third pixel and a smallest value corresponding to the largest value among the remaining values excluding the maximum value and the minimum value among the power values A fourth pixel corresponding to may be activated, and all pixels between the third pixel and the fourth pixel may be activated.

According to an embodiment of the present invention, the step of mapping the power values for each spectral bin to bitmaps corresponding to frequency bins includes a mapping method set among a plurality of methods for mapping the power values to the bitmaps. and activating some of the pixels included in the bitmaps based on the power values according to the identified method.

According to an embodiment of the present invention, the method includes: determining an information change amount of a frequency spectrum according to the plurality of methods; based on the information change amount, selecting the mapping method as a first method among the plurality of methods It may further include the step of determining to change to the second method.

According to an embodiment of the present invention, the information change amount is evaluated periodically, and the mapping method may be changed when the information change amount continuously exceeds a threshold value for a first predetermined number of periods.

According to an embodiment of the present invention, the method includes outputting an interface item for notifying a change in the mapping method when the amount of change of the information continuously exceeds a threshold value for the second predetermined number of periods may include more.

According to an embodiment of the present invention, the method may further include displaying an interface item for input for stopping the change of the mapping method and an interface item for input for immediately performing the change of the mapping method. can

According to an embodiment of the present invention, a radio wave measurement system includes a measurement device for processing a signal received through an antenna, a data server for analyzing data provided from the measurement device, and providing analysis data including a frequency spectrum; and a management device for displaying a frequency spectrum based on the analysis data provided from the data server, wherein the measuring device detects a frequency spectrum of a received signal, and based on the frequency spectrum, each spectrum bin Calculating power values, mapping the power values for each spectral bin to bitmaps corresponding to frequency bins, counting the number of activations for each pixel position in the bitmaps accumulated during a specified time period, and the management device comprising: A screen representing the frequency spectrum is output based on the number of times, one frequency bin corresponds to a plurality of spectrum bins, and the one frequency bin is a single frequency bin to which all power values of the plurality of spectrum bins are mapped. Corresponds to the bitmap.

According to the present invention, the frequency spectrum can be expressed more effectively in the radio wave measurement system.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

1 shows a radio wave measurement system according to an embodiment of the present invention.
2 illustrates a procedure for displaying a frequency spectrum in a radio wave measurement system according to an embodiment of the present invention.
3 illustrates an example of power measurement values for each frequency bin in the radio wave measurement system according to an embodiment of the present invention.
4A to 4C illustrate examples of pixel mapping for each frequency beam in a radio wave measurement system according to embodiments of the present invention.
5A to 5C illustrate examples of pixel mapping accumulated on a time axis in a radio wave measurement system according to embodiments of the present invention.
6A to 6D illustrate representation examples of spectrum data of about 700 MHz band in a radio wave measurement system according to embodiments of the present invention.
7A to 7D are enlarged views of display examples of spectrum data in a radio wave measurement system according to embodiments of the present invention.
8A to 8C illustrate representation examples of spectrum data of about 2.4 GHz band in a radio wave measurement system according to embodiments of the present invention.
9 illustrates an example of an interface related to spectrum data display in a radio wave measurement system according to embodiments of the present invention.

The following is merely illustrative of the principles of the invention. Therefore, those skilled in the art can devise various devices that, although not explicitly described or shown herein, embody the principles of the invention and are included in the spirit and scope of the invention. In addition, it should be understood that all conditional terms and examples listed herein are, in principle, expressly intended only for the purpose of understanding the inventive concept and are not limited to the specifically enumerated embodiments and states as such. .

The above-described objects, features and advantages will become more apparent through the following detailed description in relation to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the invention pertains will be able to easily practice the technical idea of the invention. .

In the specification and claims, terms such as "first," "second," "third," and "fourth," are used, if any, to distinguish between like elements, and are not necessarily used in a specific sequence. or to describe the order of occurrence. It will be understood that the terms so used are interchangeable under appropriate circumstances to enable the embodiments of the invention described herein to operate, for example, in sequences other than those shown or described herein. Likewise, where methods are described herein as including a series of steps, the order of those steps presented herein is not necessarily the order in which those steps may be performed, and any described steps may be omitted and/or Any other steps not described may be added to the method.

Also, terms such as "left", "right", "front", "behind", "top", "bottom", "above", "below" in the specification and claims are used for descriptive purposes, It is not necessarily intended to describe an invariant relative position. It will be understood that the terms so used are interchangeable under appropriate circumstances to enable the embodiments of the invention described herein to operate otherwise than, for example, as shown or described herein. As used herein, the term “connected” is defined as being directly or indirectly connected in an electrical or non-electrical manner. Objects described herein as being "adjacent" to one another may be in physical contact with one another, in proximity to one another, or in the same general scope or area as appropriate for the context in which the phrase is used. The presence of the phrase “in one embodiment” herein refers to the same, but not necessarily, embodiment.

In addition, in the specification and claims, references to 'connected', 'connecting', 'fastened', 'fastening', 'coupled', 'coupled', etc., and various variations of these expressions, refer to other elements directly It is used in the sense of being connected or indirectly connected through other components.

In addition, the suffixes "module" and "part" for the components used in this specification are given or mixed in consideration of the ease of writing the specification, and do not have distinct meanings or roles by themselves.

In addition, the terms used herein are for the purpose of describing the embodiments and are not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, 'comprise' and/or 'comprising' means that a referenced component, step, operation and/or element is the presence of one or more other components, steps, operations and/or elements. or addition is not excluded.

In addition, in the description of the invention, if it is determined that a detailed description of a known technology related to the invention may unnecessarily obscure the gist of the invention, the detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, the present invention proposes a method and apparatus for displaying a frequency spectrum in a radio wave measurement system. In particular, the present invention proposes a technique for effectively displaying a frequency spectrum when the number of spectrum bins is greater than the number of displayable frequency bins. Here, the spectral bin is a frequency axis unit of calculated spectral power, and one power value is calculated from one spectral bin. A frequency bin is a frequency axis unit of a displayed spectrum, and at least one power value may be displayed in one frequency bin.

1 shows a radio wave measurement system according to an embodiment of the present invention.

Referring to FIG. 1 , the radio wave measuring system includes an antenna device 110 , a measuring device 120 , and a remote control device 130 .

The antenna device 110 is installed at a site designated for radio wave measurement to detect a radio signal. The antenna device 110 may be disposed at a position where radio wave reception is easy. For example, the antenna device 110 may be installed outdoors. The antenna device 110 includes a structure for installation and a conductor pattern for signal sensing. For example, the antenna device 110 may be implemented as a dipole antenna, a monopole antenna, a patch antenna, a horn antenna, a reflector antenna, or the like.

The measurement device 120 generates measurement data by converting the radio waves sensed by the antenna device 110 into data, and provides the measurement data to the remote control device 130 . Here, the measurement data may vary according to conditions set by the system operator. For example, the measurement data may include a measurement result within a set frequency range, and may include a set type of information. For example, the measurement data may include at least one of frequency spectrum data, metadata, and quality measurement data. Also, the measurement device 120 may perform time synchronization with another device using a global positioning system (GPS) and synchronize data based on the time synchronization. To this end, the measurement device 120 includes a signal detection unit 122 for processing a signal provided from the antenna device 110, a real-time signal processing unit 124 for generating a real-time spectrum, and a communication unit for generating and analyzing a signal for communication ( 126 ), a screen display unit 128 for displaying a measurement result, and a processor 129 for performing overall control of the measurement device 120 . The signal detection unit 122 processes a radio frequency (RF) signal, for example, an amplifier for amplifying the signal level, a filter for passing a signal of a band to be measured, an oscillator and a mixer for frequency downconversion, At least one of an analog to digital converter (ADC) for converting an analog signal into a digital signal may be included. The real-time signal processing unit 124 generates a real-time spectrum. The real-time signal processing unit 124 may include at least one of an FPGA, an ASIC, a GPU, a DSP, and a high-performance processor. The communication unit 126 provides a wired or wireless interface, and performs a function for transmitting and receiving data according to a corresponding communication protocol. The screen display unit 128 may display the real-time spectrum generated by the real-time signal processing unit 124 . The processor 129 analyzes radio wave data provided from the signal detection unit 122 or the real-time signal processing unit 124 , and generates data for transmission to the remote control device 130 . Also, the processor 129 may control a display operation of the screen display unit 128 . In addition, the processor 129 may control various functions of the measurement device 120 .

The remote control device 130 controls the measuring device 120 and outputs information provided from the measuring device 120 . To this end, the remote control device 130 includes a communication unit 132 for generating and analyzing a signal for communication, a screen display unit 134 for displaying information, and a processor 136 for overall control of the remote control device 130 . include The communication unit 132 provides a wired or wireless interface, and performs a function for transmitting and receiving data according to a corresponding communication protocol. The screen display unit 134 displays a screen displaying data provided from the measurement device 120 and data representing an analysis result. The processor 136 analyzes the data provided from the measurement device 120 and processes it into a set form. In addition, the processor 136 may control various functions of the remote control device 130 .

According to an embodiment of the present invention, the radio wave measurement system as shown in FIG. 1 may provide a real-time spectrum analysis service. In order to analyze the signal in real time, the analysis operation of the measuring device 120 must be performed quickly so that all signal elements within the frequency band of interest can be accurately processed. Specifically, the measuring device 120 samples the input signal quickly enough to satisfy the Nyquist criterion. The Nyquist criterion includes the condition that the sampling frequency exceeds twice the bandwidth of interest. In addition, the measurement device 120 continuously and rapidly performs all calculations so that the output of the analysis can follow the change in the input signal. To this end, a fast Fourier transform (FFT) operation may be performed on the corresponding unit signal for a time shorter than the length (eg, acquisition time) of one unit signal (eg, frame) extracted from the time axis.

An FFT operation is performed to obtain a frequency spectrum from the received signal. Due to the increase of the FFT computation speed, faster spectral calculations are possible. Specifically, the spectrum calculation speed may be implemented to the extent of performing thousands to hundreds of thousands of times per second, which is significantly faster than the maximum 30 fps that the human eye can recognize. As an example of a method of displaying at a speed that can be seen by a human without missing such a high spectral speed, there is a technique for displaying a spectrum based on the number of times. For example, in displaying the spectrum, the measuring device 120 counts the number of times the power value occupies each pixel on the bitmap, and visually distinguishes the counted number of times (eg, by displaying a different color) )can do. In this case, the appearance and characteristics may be expressed differently depending on the method of displaying the graph of each spectrum on the screen.

2 illustrates a procedure for displaying a frequency spectrum in a radio wave measurement system according to an embodiment of the present invention. The procedure of FIG. 2 may be performed by the measuring device 120 . Hereinafter, for convenience of explanation, the operating subject of each step is expressed as 'device', but the performing subject of each step may be understood as the measuring device 120 .

Referring to FIG. 2 , in step 201 , the device detects a spectrum. The apparatus may detect a frequency spectrum by performing an FFT operation on a received signal having a predetermined bandwidth. Specifically, the device may convert a time domain signal (eg, I/Q data) into a frequency domain signal through a windowing operation and an FFT operation.

In step 203, the device calculates the power of the detected spectral bin. Then, the device may convert the calculated power into a dB scale. In this case, the power value is generated for each spectral bin. In other words, one power value is calculated for one spectral bin. Here, the plurality of spectral bins may correspond to one frequency bin.

In step 205, the device maps the spectrum. The device maps the power value for each spectral bin to bitmaps corresponding to the frequency bins. In other words, the device may generate a bitmap corresponding to the values of the frequency bin. Each of the bits constituting the bitmap corresponds to one power value, and the value is mapped to a bit at a position corresponding to the measured power value. That is, the bits express the power value using the position. In this case, a plurality of power values may be mapped to one frequency bin. In this case, the device may map a plurality of values to a bitmap corresponding to each frequency bin according to a set rule. For example, the set rule may be defined based on at least one of a maximum power value, a minimum power value, an intermediate power value, and an average power value.

In step 207, the device counts the number of pixels. Here, a pixel corresponds to each bit of the bitmap. Specifically, the device counts the number of times each pixel is activated in bitmaps generated for a set time. In other words, the device counts the number of times the power value is measured for each bit position in the bitmaps generated during the set time. Here, the set time is a time from the present to a specific past time point, and is a time at which a plurality of consecutive bitmaps are generated on the time axis of the real-time spectrum data. Accordingly, for each frequency bin, it can be checked how many times the power values corresponding to each pixel are measured in the plurality of bitmaps.

In step 209, the device outputs a screen representing the frequency spectrum. In this case, the device outputs a screen indicating the frequency spectrum based on the counts in step 207 . For example, a counting result can be visually distinguished (eg, by a difference in pixel color). Specifically, the counting value '1' and the counting value '2' may be expressed in different colors. This step may be understood as an operation of transmitting data (eg, bitmaps corresponding to frequency bins) for outputting a screen through a network or an operation of displaying a screen through an output device.

According to an embodiment of the present invention, a frequency spectrum may be displayed in an environment in which a plurality of spectrum bins correspond to one frequency bin. 3 illustrates such an environment. 3 illustrates an example of power measurement values for each frequency bin in the radio wave measurement system according to an embodiment of the present invention. Referring to FIG. 3 , four spectrum bins may correspond to one frequency bin. That is, one frequency bin includes four spectral bins, which means that four power values are represented through one frequency bin. For example, the second frequency bin 310 includes four spectral bins, such that four power values 311 - 314 are generated within the frequency bin 310 . Accordingly, a plurality of power values 311 to 314 corresponding to a plurality of spectral bins should be properly mapped to a bitmap for one frequency bin 310 . Hereinafter, various embodiments of mapping a plurality of power values to one bitmap will be described.

4A to 4C illustrate examples of pixel mapping for each frequency beam in a radio wave measurement system according to embodiments of the present invention. 4A to 4C illustrate mapping results according to various embodiments when the measurement result is the same as that of FIG. 3 . Specifically, FIG. 4A shows an embodiment of mapping only a plurality of power values (hereinafter referred to as a 'first method'), and FIG. 4B shows an embodiment of mapping all intermediate values between the maximum value and the minimum value among the plurality of power values. An example (hereinafter referred to as a 'second method'), FIG. 4C illustrates an embodiment in which the maximum value and the minimum value among a plurality of power values are mapped, and all other intermediate values are mapped (hereinafter referred to as a "third method") indicates

Referring to FIG. 4A , according to the first method, the bitmap 410 corresponding to the frequency bin 310 of FIG. 3 includes a plurality of pixels. A color value is mapped to four pixels 411 to 414 corresponding to the four power values 311 to 314 of FIG. 3 among the plurality of pixels. That is, according to the embodiment shown in FIG. 4A , only pixels at positions corresponding to the measured power values are activated. In this case, the noise level is lowered and the transmission amount is reduced.

Referring to FIG. 4B , according to the second method, the bitmap 410 corresponding to the frequency bin 310 of FIG. 3 includes a plurality of pixels. Among the plurality of pixels, the pixel 412 corresponding to the maximum value 312 among the four power values 311 to 314 of FIG. 3 and the pixel 411 corresponding to the minimum value 311 are activated, and two pixels are activated. All pixels between 411 and 412 are also activated. That is, according to the embodiment shown in FIG. 4B , a greater number of pixels than pixels corresponding to the measured power value are activated. In this case, a hidden signal can be captured due to the widening of the range of the displayed signal, and there is an advantage in that the intermittently occurring signal can be easily observed.

Referring to FIG. 4C , according to the third method, the bitmap 410 corresponding to the frequency bin 310 of FIG. 3 includes a plurality of pixels. Among the plurality of pixels, the pixel 412 corresponding to the maximum value 312 and the pixel 411 corresponding to the minimum value 311 among the four power values 311 to 314 of FIG. 3 are activated, and the remaining values ( The pixels 414 and 413 corresponding to the largest value 314 and the smallest value 313 among 313 and 314 and pixels therebetween are also activated. That is, according to the embodiment shown in FIG. 4C , a greater number of pixels than pixels corresponding to the measured power value are activated. In this case, there is an advantage of observing the mainly occurring signal band without missing a signal that occurs briefly.

As in the embodiments described with reference to FIGS. 4A to 4C , a plurality of power values may be displayed through a bitmap for one frequency bin. Examples shown in FIGS. 4A to 4C are mapping examples of measurement values generated in one measurement instance. According to embodiments of the present disclosure, values for a plurality of measurement instances may be displayed cumulatively. 5A to 5C below illustrate counting values mapped to pixels according to the accumulated number of measurement instances (N).

5A to 5C illustrate examples of pixel mapping accumulated on a time axis in a radio wave measurement system according to embodiments of the present invention. FIG. 5A illustrates cumulative mapping when the first method is applied, FIG. 5B illustrates cumulative mapping when the second method is applied, and FIG. 5C illustrates cumulative mapping when the third method is applied.

Referring to FIGS. 5A to 5C , when N=1, the mapping result is the same as the mapping of FIGS. 4A, 4B, and 4C, respectively. When N=1, since measurement values are obtained in one measurement instance without accumulation, there is no pixel having a value greater than 1. When N=2, some pixels have 2. When N=9, there are relatively more pixels mapped to a value, and the values belong to a range of 1 or more and 9 or less.

When the measured values are mapped to the bitmap according to the above-described method, the real-time spectrum representation provided to the user is shown in FIGS. 6A to 8C below. Hereinafter, in FIGS. 6A to 8C , the color of a pixel becomes closer to blue as the number of times accumulated is smaller, and closer to red as the number of times accumulated is greater.

6A to 6D illustrate representation examples of spectrum data of about 700 MHz band in a radio wave measurement system according to embodiments of the present invention. 7A to 7D are enlarged views of display examples of spectrum data in a radio wave measurement system according to embodiments of the present invention. 6A to 6D and 7A to 7D are examples of real-time spectrum results with a frequency of 778 MHz and a bandwidth of 3.2 MHz being measured. When the spectrum data is measured as shown in FIG. 6A , the spectrum data may be expressed as shown in FIGS. 6B to 6D according to the above-described embodiments. 6B illustrates a representation according to a first scheme, FIG. 6C illustrates a representation according to a second scheme, and FIG. 6D illustrates a representation according to a third scheme.

In the case of the first method, since only detected power values are displayed, the number of pixels having a value is relatively small compared to the other methods. Accordingly, referring to FIGS. 6B to 6D , in the case of FIG. 6A according to the first method, even when accumulating over a plurality of measurement instances, the number of pixels displayed with a large number of accumulations is relatively small compared to other methods. Referring to FIGS. 6B to 6D , since the second method has the largest number of pixels having a value in each measurement instance, in the case of FIG. 6B according to the second method, it is confirmed that the number of pixels displayed with a large cumulative number is the largest. do.

8A to 8C illustrate representation examples of spectrum data of about 2.4 GHz band in a radio wave measurement system according to embodiments of the present invention. 8A to 8C are examples of real-time spectrum results with a frequency of 2399.3 MHz and a bandwidth of 640 kHz as measurement targets. Referring to FIGS. 8A to 8C , similar to the example of FIGS. 6B to 6D , in the case of FIG. 8A according to the first method, there are relatively few pixels displayed with a large number of accumulations compared to other methods. Also, referring to FIGS. 8A to 8C , in the case of FIG. 8B according to the second method, the number of pixels displayed with a large accumulation number is the largest.

9 illustrates an example of an interface related to spectrum data display in a radio wave measurement system according to embodiments of the present invention. 9 illustrates an interface screen displayed on the management device 140 .

Referring to FIG. 9 , the interface screen includes a spectrum display area 910 , an upper menu 920 , and a side menu 930 .

The spectrum display area 910 is an area in which the spectrum graph 911 is displayed, and includes a legend 912 describing the cumulative number of times indicated by a color. The spectrum graph 911 displayed on the spectrum display area 910 may be determined according to a type designated through the upper menu 920 .

The upper menu 920 includes buttons 921 , 922 , and 923 for designating the type of spectrum displayed on the spectrum display area 910 , and a button 924 for entering a setting menu. For example, the displayable spectrum may include a 'spectrum', a 'realtime spectrum', and a 'multiband spectrum'. Specifically, the 'spectrum' item refers to a general spectrum analysis screen, and even if the set bandwidth is wide, it is set while sweeping the frequency so that a wide band can be viewed. The 'real-time spectrum' item allows you to see the spectrum without sweeping and without missing a received sample at one frequency value. The 'Multiband Spectrum' item makes it possible to view the signals of multiple bands that are separated from each other by displaying them in each window. In addition, the upper menu 920 includes a button 925 for controlling the connection state. When the button 925 is selected, items for controlling the IP change/input of the measurement device 120 and the connection/disconnection function with the measurement device 120 in the remote control device 130 are displayed.

The side menu 930 includes a display selection menu 931 for a display mode and a control tab selection menu 932 . The display selection menu 931 includes a 'persist' item and a 'spectro' item. The 'persist' item is an item that displays the result of accumulating power values for a certain period, and the 'spectro' item is an item that displays a spectrogram for a certain time. The control tab selection menu 932 includes a 'Basic' tab, a 'Persist' tab, and a 'Spectro' tab. The 'Basic' tab contains items for basic setting, the 'Persist' tab contains items for setting related to the 'Persist' item, and the 'Spectro' tab contains items for setting related to the 'spectro' item. do.

9 illustrates a case in which the 'Basic' tab is selected. The control tab selection menu 932 includes a frequency item 932a for adjusting a center frequency to be displayed, a span item 932b for adjusting a frequency bandwidth to be displayed, and a maximum level to be displayed. and a reference level item 932c. Also, although not shown in FIG. 9 , the control tab selection menu 932 may further include a Persistence Time item for designating the counted cumulative number of times, that is, a persistence execution time.

Previously, various embodiments of mapping a plurality of power values corresponding to a plurality of spectral bins to a bitmap corresponding to one frequency bin have been described. A system according to an embodiment of the present invention may support only one scheme among the above-described embodiments (eg, the first scheme, the second scheme, and the third scheme) or may support a plurality of schemes. When a plurality of schemes are supported, the user may arbitrarily control the frequency spectrum to be displayed according to any one scheme using a user interface (eg, FIG. 9 ). In this case, the user will select an appropriate method according to their needs.

According to another embodiment of the present invention, the device may adaptively change a plurality of mapping schemes. To this end, when the condition for changing the mapping method is satisfied while displaying the frequency spectrum according to one method or default method designated by the user, the device displays the frequency spectrum in a method corresponding to the satisfied condition. change the In this case, the condition may be defined in various ways. For example, the condition may be defined based on comparison of mapping results according to different methods. Specific examples of conditions for changing the mapping method are as follows.

According to an embodiment of the present invention, the selection criterion for the mapping method may be defined such that the method with the largest amount of change of information revealed in the expression is selected. A large amount of change in information means that new information is introduced. Accordingly, the mapping method may be selected such that the amount of change in information is most expressed so that the user can be properly provided with new information. Here, the amount of change in information may be evaluated as the amount of change in values of bitmaps.

To this end, the device generates bitmaps for each frequency bin according to the currently displayed mapping scheme as well as other schemes. Then, the device calculates the change amount for each pixel over time for the bitmaps reflecting the accumulated counting times for each method, and checks the method in which the average or the sum of the change amount for each pixel is the greatest. As a result of the check, if the currently displayed method is not the checked method, the device changes the mapping method to the checked method. The above-described change amount calculation and confirmation operation may be performed periodically.

The operation of changing the mapping method based on the amount of change in bitmap values may be performed by condition satisfaction of one cycle or by successive condition satisfaction for a plurality of periods. When the mapping method is changed by successive condition satisfaction (e.g., K successive condition satisfactions) for a plurality of cycles, fewer successive condition satisfactions (e.g. L(<K) successive condition satisfaction) At the time, the device may display an interface item notifying a change in the mapping method. This is done by notifying the user of a change in the mapping method in advance.

According to various embodiments, the interface item for notifying the change of the mapping method may include at least one of an icon, text, a pop-up window, and a thumbnail. Here, the icon may have a form representing the mode to be changed. Also, the text may include a value indicating the mode to be changed. In addition, the text is a value indicating a specific frequency value, and may include a value indicating a frequency showing the greatest change in information when a condition causing the change is satisfied. Also, the pop-up window may include information indicating the mode to be changed to be changed. In addition, the thumbnail may include a thumbnail of the frequency spectrum screen expressed in a manner to be changed.

Additionally, in addition to the interface item for notifying the change of the mapping method, the device may further display an interface item for input stopping the change of the mapping method. For example, the device may further display a button that stops the change of the mapping method when selected or clicked in parallel with the display of an icon, a pop-up window, or a thumbnail for notifying the change of the mapping method. Accordingly, when the user selects (eg, clicks) the corresponding interface item, the device may stop the operation of changing the mapping method and initialize the measurement of the change amount of information. Thereafter, a change of the mapping method may be started again based on the amount of change in the information. In this case, in order to prevent a phenomenon in which notice and interruption are unnecessarily repeated, the device may prohibit a change in the mapping method for a predetermined time after the interruption.

As another example, in addition to the interface item for notifying the change of the mapping method, the device may further display an interface item for input for immediately performing the change of the mapping method. For example, in parallel with the display of an icon, a pop-up window, or a thumbnail that foreshadows a change in the mapping method, the device may further display a button for performing a change of the mapping method regardless of additional condition satisfaction when selected or clicked. Accordingly, when the user selects (eg, clicks) the corresponding interface item, the device may immediately change the mapping method without evaluating whether an additional condition is satisfied.

According to an embodiment of the present invention, when a large amount of information change of a certain level or more is detected while maintaining the currently applied mapping method, the device may display an interface item for a notification to the user. Here, the amount of information change can be evaluated as the amount of change in the values of bitmaps, and the amount of change of information larger than a certain level is a statistical value of the amount of change in the values of bitmaps (eg, average value, maximum value, median value, minimum value, etc.) It may be determined according to whether or not exceeds a threshold.

According to various embodiments, the interface item for a notification may include at least one of an icon, text, a pop-up window, and a thumbnail. Here, the icon may have a form indicating that a large amount of information change greater than a certain level is detected. In addition, the text is a value indicating a specific frequency value and may include a value indicating a frequency showing the greatest change in information when a condition causing the notification is satisfied. In addition, the thumbnail may include a thumbnail of the frequency spectrum screen at the point in time showing a large change.

As described above, the radio wave measurement system according to various embodiments of the present disclosure may support various mapping methods, and may further have a function of displaying an adaptive control between the mapping methods and a notification of a sudden information change, if necessary. can In addition, according to an embodiment of the present invention, the radio wave measurement system may provide a function of detecting physical abnormalities of the antenna device (the antenna device 110 and the measurement device (eg, the measurement device 120 )). Here, the physical anomaly refers to an abnormality at a level that causes distortion in the radio wave measurement value even though it appears to operate normally. Temporarily abrupt changes in information may occur at the moment (eg, when an impact is applied to the antenna).

Accordingly, according to an embodiment, when an abrupt change in information (eg, a statistical value of a change amount of bitmaps exceeds a threshold) is detected, the system or device detects an abnormal signal of a certain pattern that did not exist before the detection. to determine whether it is continuously occurring. The abnormal signal may have various forms according to the type of physical abnormality.

Additionally, the system or device may use the frequency spectrum detected by the at least one other measurement device to distinguish whether the abnormal signal is due to a physical abnormality of the device or the appearance of a new signal source. If a new signal source is generated, it can be predicted that similar abnormal signals are detected in other geographically adjacent measuring devices. Accordingly, upon recognizing that an anomaly signal is occurring, the system or device selects at least one of the measuring devices that are geographically adjacent to the measuring device that generated the frequency spectrum, and a similar change in the frequency spectrum generated by the identified measuring device determine whether or not has occurred. To this end, the system or device may compare the difference values of the frequency spectrum data before and after the generation of the abnormal signal. For this operation, interworking between the data server and the management device may be required. For example, the management device may detect the occurrence of an abnormal signal and request a comparison with the frequency spectrum generated by another measurement device to the data server.

In order to detect the above-described physical anomaly, it is necessary to rapidly change information and determine an abnormal signal. For this purpose, an artificial intelligence (AI) based algorithm may be used. Since it cannot be concluded that all sudden changes in information and the occurrence of abnormal signals are due to physical abnormalities, the accuracy of judgment can be improved by using an artificial intelligence-based algorithm. To this end, learning data may be acquired through an intentionally created physical abnormal situation in advance, and machine learning or deep learning may be performed based on the acquired learning data.

The image processing apparatus and the image processing method according to the embodiment described above may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured according to the embodiment, or may be known and used by those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and carry out program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like.

Each of the drawings referenced in the description of the previous embodiment is merely an embodiment shown for convenience of description, and items, contents, and images of information displayed on each screen may be modified and displayed in various forms.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

Claims (10)

A method of operating a radio wave measurement system, comprising:
detecting the frequency spectrum of the signal received by the measuring device;
calculating power values for each spectrum bin based on the frequency spectrum;
mapping the power values for each spectral bin to bitmaps corresponding to frequency bins;
counting the number of activations for each pixel position in bitmaps accumulated during a plurality of time points within a specified time period; and
outputting the screen representing the frequency spectrum based on the number of times according to one mapping method among a plurality of supportable mapping methods, including a first method, a second method, and a third method,
The frequency bins are a minimum unit constituting a frequency axis on the screen displaying the frequency spectrum, and one frequency bin corresponds to one bitmap,
The spectral bin is a minimum unit constituting a frequency axis from the power values calculated from the frequency spectrum, and one power value represents one spectral bin,
Each of the bitmaps is a plurality of pixels arranged in a line, the position of each pixel corresponds to a power value, and each pixel expresses the number of times of detection and accumulation of the corresponding power value by using the activation status and color value,
One frequency bin corresponds to a plurality of spectral bins,
The one frequency bin corresponds to one bitmap to which all power values of the plurality of spectral bins are mapped,
The first method is a method in which, at each time point, only pixels at positions indicating power values of a plurality of corresponding spectral bins among a plurality of pixels constituting one bitmap are activated,
In the second method, at each time point, among a plurality of pixels constituting one bitmap, a first pixel corresponding to a maximum value among power values of a corresponding plurality of spectral bins and a second pixel corresponding to a minimum value is activated, and all pixels between the first pixel and the second pixel are activated,
In the third method, at each time point, among a plurality of pixels constituting one bitmap, a first pixel corresponding to a maximum value among power values of a corresponding plurality of spectral bins and a second pixel corresponding to a minimum value is activated, and a third pixel corresponding to the largest value and a fourth pixel corresponding to the smallest value among the remaining power values excluding the first pixel and the second pixel are activated, and the third pixel and the fourth pixel are activated. In this way, all pixels between pixels are activated,
The step of outputting the screen representing the frequency spectrum based on the number of times according to one of the supported mapping methods, including the first method, the second method, and the third method,
outputting a screen including first bitmaps representing the frequency spectrum according to the first method;
generating second bitmaps according to the second method and third bitmaps according to a third method while outputting a screen including the first bitmaps;
calculating an average or sum of changes in values for each pixel of the first bitmaps, the second bitmaps, and the third bitmaps; and
and changing the mapping method to the second method when the method in which the average or the sum of the change amounts for each pixel is the maximum is the second method.
The method according to claim 1,
Changing the mapping method to the second method includes:
Continuously for a plurality of L times, if the average or sum of the value change amount for each pixel of the second method is the maximum, the first interface item for notifying the change of the mapping method and the second interface item for inputting the change stop displaying;
checking whether an input requesting to stop the change is generated from the user through the second interface item;
If the average or sum of the change amount of each pixel of the second method is the maximum continuously for a plurality of periods of K times greater than L without generating an input for requesting to stop the change, the mapping method is changed to the second method The method further comprising the step of changing the manner.
3. The method according to claim 2,
The first interface item includes a value indicating the second method, a value indicating a frequency showing the greatest change, and a thumbnail of a frequency spectrum screen expressed in the second method.
3. The method according to claim 2,
Changing the mapping method to the second method includes:
continuously for a plurality of L times, displaying a third interface element for instructing an immediate mapping method change to the second method when the average or sum of the value change amounts for each pixel of the second method is maximum; and
and when the immediate mapping scheme change occurs, changing the mapping scheme to the second scheme without waiting for the K times period.
The method according to claim 1,
detecting the occurrence of an abnormal signal of a certain pattern based on the change amount of each pixel of each of the bitmaps;
checking whether the abnormal signal is included in a frequency spectrum detected by a measuring device other than the measuring device;
judging that the abnormal signal is generated by the appearance of a new signal source when the abnormal signal is included in the frequency spectrum detected by the other measuring device; and
If the frequency spectrum detected by the other measuring device does not include the abnormal signal, determining that the abnormal signal is generated due to a physical abnormality of the measuring device.
The method according to claim 1,
determining an information change amount of a frequency spectrum according to the plurality of mapping methods;
The method further comprising the step of determining to change the mapping scheme from one of the plurality of schemes to another, based on the information change amount.
7. The method of claim 6,
The information change amount is evaluated periodically,
The mapping method is changed when the amount of change of the information continuously exceeds a threshold value for a first predetermined number of periods.
8. The method of claim 7,
The method further comprising the step of outputting an interface item for notifying a change in the mapping method when the amount of change of the information continuously exceeds a threshold for a second predetermined number of periods.
The method according to claim 1,
The step of outputting the screen representing the frequency spectrum based on the number of times according to one mapping method among a plurality of supportable mapping methods, including a first method, a second method, and a third method,
detecting a change amount of information greater than or equal to a threshold;
Displaying an interface item notifying that a change in information above the threshold occurs,
The interface item includes information indicating a frequency at which the amount of change of information equal to or greater than the threshold value occurs, and a thumbnail of a frequency spectrum at a time when the change amount of information equal to or greater than the threshold is detected.
In the radio wave measurement system,
a measuring device for processing a signal received through an antenna;
a data server that analyzes data provided from the measurement device and provides analysis data including a frequency spectrum; and
A management device for displaying a frequency spectrum based on the analysis data provided from the data server,
The measuring device detects a frequency spectrum of a received signal, calculates power values for each spectral bin based on the frequency spectrum, and maps the power values for each spectral bin to bitmaps corresponding to frequency bins. and counting the number of activations for each pixel position in the bitmaps accumulated during a plurality of time points within a specified time interval,
The management device outputs the screen representing the frequency spectrum based on the number of times according to one mapping method among a plurality of supportable mapping methods, including a first method, a second method, and a third method, ,
The frequency bins are a minimum unit constituting a frequency axis on the screen displaying the frequency spectrum, and one frequency bin corresponds to one bitmap,
The spectral bin is a minimum unit constituting a frequency axis from the power values calculated from the frequency spectrum, and one power value represents one spectral bin,
Each of the bitmaps is a plurality of pixels arranged in a line, the position of each pixel corresponds to a power value, and each pixel expresses the number of times of detection and accumulation of the corresponding power value by using the activation status and color value,
One frequency bin corresponds to a plurality of spectral bins,
The one frequency bin corresponds to one bitmap to which all power values of the plurality of spectral bins are mapped,
The first method is a method in which, at each time point, only pixels at positions indicating power values of a plurality of corresponding spectral bins among a plurality of pixels constituting one bitmap are activated,
In the second method, at each time point, among a plurality of pixels constituting one bitmap, a first pixel corresponding to a maximum value among power values of a corresponding plurality of spectral bins and a second pixel corresponding to a minimum value is activated, and all pixels between the first pixel and the second pixel are activated,
In the third method, at each time point, among a plurality of pixels constituting one bitmap, a first pixel corresponding to a maximum value among power values of a corresponding plurality of spectral bins and a second pixel corresponding to a minimum value is activated, and a third pixel corresponding to the largest value and a fourth pixel corresponding to the smallest value among the remaining power values except for the first pixel and the second pixel are activated, and the third pixel and the fourth pixel are activated. In this way, all pixels between pixels are activated,
The management device,
output a screen including first bitmaps representing the frequency spectrum according to the first method;
generating second bitmaps according to the second method and third bitmaps according to the third method while outputting the screen including the first bitmaps;
calculating an average or sum of the change amounts of values for each pixel of the first bitmaps, the second bitmaps, and the third bitmaps, and
If the second method is the method in which the average or the sum of the changes in values for each pixel is the maximum, the radio wave measurement system changes the mapping method to the second method.

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