WO2019167739A1

WO2019167739A1 - Unwanted radio wave evaluation system

Info

Publication number: WO2019167739A1
Application number: PCT/JP2019/006250
Authority: WO
Inventors: 真永田; 山口　正洋; 田中　聡
Original assignee: 国立大学法人神戸大学; 国立大学法人東北大学
Priority date: 2018-03-02
Filing date: 2019-02-20
Publication date: 2019-09-06
Also published as: JPWO2019167739A1; JP6789533B2

Abstract

This unwanted radio wave evaluation system, provided with a first storage device which stores an unwanted radio wave database for storing unwanted radio wave data, is provided with: an unwanted radio wave recording device which, in a plurality of regions in the vicinity of a device which generates unwanted radio waves, measures the unwanted radio waves under prescribed recording conditions, records unwanted radio wave data including digital data of the unwanted radio waves, being the result of the measurement, and the recording conditions, and stores the same in the unwanted radio wave database; and an unwanted radio wave reproducing device which reproduces the unwanted radio waves corresponding to the unwanted radio wave data stored in the unwanted radio wave database. Here, the unwanted radio wave evaluation system is provided with a first control means for performing feature extraction for at least one feature item among unwanted radio wave feature data, from the unwanted radio wave data stored in the unwanted radio wave database, as unwanted radio wave feature data, and storing the unwanted radio wave feature data in the unwanted radio wave database.

Description

Unnecessary radio wave evaluation system

The present invention relates to an unnecessary radio wave evaluation system for evaluating unnecessary radio waves such as electromagnetic noise.

In recent years, with the increase in speed, scale, and functionality of integrated circuits, power supply noise due to periodic operation of digital circuits, switching power supply circuits, etc. has become wideband and becomes electromagnetic noise, which is an unwanted radio wave as a disturbing factor in miniaturization of wireless communication devices. Interference is a problem. In the IoT era, a digital circuit such as an FPGA that performs control with a communication chip is incorporated in one housing, and harmonics of the clock frequency of the digital circuit may affect communication quality.

When the digital circuit synchronizes with the clock signal, impulse switching noise is generated in the power supply path, and its higher-order harmonic components reach the frequency range used by mobile communication. Therefore, evaluation has been performed on the influence of noise generated by the inverter device or the digital device used for control on the mobile communication module (for example, see Non-Patent Document 1). As electronic devices become more sophisticated, it is necessary to increase the speed, scale, and functionality of IC chips. This causes high-frequency noise, which increases the density of electronic devices around you, causing unnecessary radio wave problems. It has become more serious.

In addition, unnecessary waves corresponding to higher harmonics of clock signals in digital circuits are evaluated in the mobile communication frequency domain (see, for example, Non-Patent Documents 2 to 4).

Furthermore, for example, in Patent Document 1, in order to solve the problem that electromagnetic waves radiated from a certain device affect other devices and the operation of the other devices becomes unstable, detailed descriptions of devices that emit electromagnetic waves are provided. By providing a database, it is disclosed to provide a system that allows calculation of the spatial distribution of electromagnetic waves radiated from an electrical and electronic device and makes it possible to evaluate the influence of the electromagnetic waves on the electrical and electronic device.

JP 2012-103045 A

Conventionally, however, evaluation of interference in wireless communication performance due to unnecessary radio waves has required simultaneous evaluation in an experimental environment in which a source of unnecessary radio waves (electromagnetic noise source device) and a radio communication device are arranged in a common space. In particular, the cost of constructing an experimental environment that uses an anechoic chamber is high, and thus careful preparations such as experimental conditions are required. Even if an unnecessary radio wave countermeasure was devised and developed, it took time to prove its effect. Specifically, the following problems exist.
(A) The cycle of devising and demonstrating unnecessary radio wave countermeasures (unnecessary radio wave reducing material, unnecessary radio wave reducing structure, etc.) is long.
(B) An enormous amount of time is required for the experiment that separates “unwanted radio wave generation”, “unnecessary radio wave propagation”, and “unnecessary radio wave interference”, which are necessary for the development of measures against unwanted radio waves.

An object of the present invention is to provide an unnecessary radio wave evaluation system capable of solving the above-mentioned modification and shortening and simplifying the evaluation time of unnecessary radio waves as compared with the prior art.

An unnecessary radio wave evaluation system according to a first aspect of the present invention is an unnecessary radio wave evaluation system including a first storage device that stores an unnecessary radio wave database for storing unnecessary radio wave data.
In a plurality of areas near the device that generates the unwanted radio waves, the unwanted radio waves are measured under predetermined recording conditions, and the unwanted radio wave data including the unwanted radio wave digital data and the recording conditions is recorded as a measurement result. An unnecessary radio wave recording device stored in the unnecessary radio wave database;
And an unnecessary radio wave reproducing device for reproducing unnecessary radio waves corresponding to the unnecessary radio wave data stored in the unnecessary radio wave database.

In the unnecessary radio wave evaluation system,
A second storage device for storing an unnecessary radio wave feature database including predetermined unnecessary radio wave feature data;
A feature is extracted from the unnecessary radio wave data stored in the unnecessary radio wave database as unnecessary radio wave feature data for at least one feature item of the unnecessary radio wave feature data, and the unnecessary radio wave feature data is stored in the unnecessary radio wave feature database. 1 control means.

In the unwanted radio wave evaluation system, the unwanted radio wave data stored in the unwanted radio wave database is searched using a predetermined unwanted radio wave feature search condition that is at least one feature item of the unwanted radio wave feature data. The second control means for outputting the search result is provided.

Further, in the unwanted radio wave evaluation system, the unwanted radio wave feature data stored in the unwanted radio wave feature database is searched using a predetermined unwanted radio wave feature search condition that is at least one feature item of the unwanted radio wave feature data. Thus, a second control means for outputting the search result is provided.

Still further, in the unnecessary radio wave evaluation system, when the unnecessary radio wave is reproduced by the unnecessary radio wave reproducing device to a predetermined exposure radio communication device, exposure test data including an evaluation value of the exposed radio communication device is generated. 3 is further provided.

Further, in the unnecessary radio wave evaluation system, the third control means generates the exposure test data by simulating the exposed wireless communication device.

The unnecessary radio wave evaluation system further includes a third storage device that stores an exposure test database including the exposure test data,
The third control means stores the exposure test data in the exposure test database.

Still further, in the unnecessary radio wave evaluation system, the third control means determines whether the influence of the exposure test on the unnecessary radio wave recording data of a predetermined exposure wireless communication device is predetermined based on the exposure test data in the exposure test database. According to whether or not the threshold condition is not reached, it is classified and output.

In the unnecessary radio wave evaluation system, the third control means searches for the corresponding unnecessary radio wave data from the exposure test data in the exposure test database using a predetermined exposure test search condition. To do.

Further, in the unnecessary radio wave evaluation system, the third control means includes: a wireless communication device whose influence of the exposure test does not reach a predetermined threshold condition based on the exposure test data in the exposure test database; and the threshold condition It classifies | categorizes and outputs to the radio | wireless communication apparatus exceeding.

Still further, in the unwanted radio wave evaluation system, the third control means uses a predetermined unwanted radio wave feature search condition from the unwanted radio wave feature data in the unwanted radio wave feature database to perform an exposure test in the exposure test database. Searching for unnecessary radio wave characteristic data corresponding to a wireless communication device in the data.

An unnecessary radio wave evaluation system according to a second invention is an unnecessary radio wave evaluation system including a first storage device that stores an unnecessary radio wave database that stores unnecessary radio wave data.
An unnecessary radio wave reproducing device for reproducing unnecessary radio waves corresponding to the unnecessary radio wave data stored in the unnecessary radio wave database is provided.

In the unnecessary radio wave evaluation system, third control for generating exposure test data including an evaluation value of the exposed radio communication device when the unnecessary radio wave is reproduced by the unnecessary radio wave reproduction device with respect to a predetermined exposure radio communication device. And the third control means generates the exposure test data by simulating the exposed wireless communication device.

Therefore, according to the unnecessary radio wave evaluation system according to the present invention, it is possible to shorten and simplify the evaluation time of unnecessary radio waves as compared with the prior art.

It is a block diagram which shows the structural example of the unnecessary electromagnetic wave evaluation system 300 which concerns on embodiment of this invention. It is a table | surface which shows an example of the labeled unnecessary radio wave recording data stored in the unnecessary radio wave database 30a of FIG. It is a block diagram which shows the structural example of the unnecessary radio wave data feature extraction system 301 which concerns on embodiment of this invention. It is a block diagram which shows the structural example of the unnecessary radio wave data search system 302 which concerns on embodiment of this invention. It is a block diagram which shows the structural example of the unnecessary radio wave exposure test system 303 which concerns on embodiment of this invention. It is a table | surface which shows an example of the labeled exposure test data stored in the unnecessary radio wave exposure test database 70a of FIG. It is a block diagram which shows the structural example of the unnecessary radio wave exposure test data registration system 304 which concerns on embodiment of this invention. It is a block diagram which shows the classification | category process performed by the unnecessary radio wave exposure test data registration system 304 of FIG. It is a block diagram which shows the structural example of the unnecessary radio wave exposure test data search system 305 which concerns on embodiment of this invention. It is a block diagram which shows the classification | category process performed by the unnecessary radio wave exposure test data search system 305 of FIG. It is a block diagram which shows the structural example of the unnecessary radio wave exposure test data search system 306 which concerns on embodiment of this invention. FIG. 2 is a perspective view showing a specific example of recording unnecessary radio wave data using the unnecessary radio wave recording apparatus 10 of FIG. 13 is a table showing an example of labeled unnecessary radio waves acquired by the unnecessary radio wave recording apparatus 10 of FIG. 12. It is a perspective view which shows the specific example which records unnecessary radio wave data on the table | surface of a laboratory using the unnecessary radio wave recording apparatus 10 of FIG. It is a table | surface which shows an example of the labeled unnecessary radio wave acquired by the unnecessary radio wave recording apparatus 10 of FIG. It is a perspective view which shows the specific example which reproduces | requires unnecessary radio wave data on the table | surface of a laboratory using the unnecessary radio wave reproducing | regenerating apparatus 20 of FIG. It is a block diagram which shows the structural example of the unnecessary electromagnetic wave reproduction | regeneration emulator apparatus 20E which concerns on embodiment of this invention. It is a perspective view which shows the measurement of the unnecessary radio wave using the unnecessary radio wave evaluation system 300 which concerns on embodiment, and the evaluation of the radio | wireless communication interference by an unnecessary radio wave. It is a perspective view showing development of a wireless communication device using unnecessary electric wave evaluation system 300 concerning an embodiment, and design support of unnecessary electric wave. It is a HILS simulation result by recording and reproduction | regeneration of the unnecessary electromagnetic wave which concerns on Example 1, Comprising: It is a graph which shows the evaluation example of LTE receiving sensitivity. It is a functional simulation result by recording and reproduction | regeneration of the unnecessary electromagnetic wave which concerns on Example 1, Comprising: It is a graph which shows the evaluation example of LTE receiving sensitivity. It is a graph which shows the distance dependence of the unnecessary electromagnetic wave strength before and behind the countermeasure by the noise suppression sheet | seat which concerns on Example 2. FIG. It is a graph which shows the influence which the unnecessary electromagnetic wave which concerns on Example 2 has on wireless communication quality.

Hereinafter, embodiments according to the present invention will be described. In the drawings, the same or similar components are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 1 is a block diagram showing a configuration example of an unnecessary radio wave evaluation system 300 according to an embodiment of the present invention. In FIG. 1, an unnecessary radio wave evaluation system 300 includes an unnecessary radio wave recording device 10, a database storage device 30 of a cloud server device 200 that stores an unnecessary radio wave database 30a, and an unnecessary radio wave reproducing device 20. The cloud server device 200 is connected to the unnecessary radio wave recording device 10 via the communication line 201 and is connected to the unnecessary radio wave reproducing device 20 via the communication line 202. The database storage device 30 may be directly connected to the unnecessary radio wave recording device 10 or the unnecessary radio wave reproducing device 20.

1, the unnecessary radio wave recording apparatus 10 includes an antenna 11, a filter 12, a low noise amplifier 13, and a digital spectrum analyzer 14. The antenna 11 receives an unnecessary radio wave such as electromagnetic noise and outputs it to the digital spectrum analyzer 14 via a filter 12 such as a band filter or a low-pass filter that passes the band of the unnecessary radio wave and a low noise amplifier 13.

The digital spectrum analyzer 14 includes a frequency converter 15, an A / D converter 16, a digital output data format converter 17, and a communication circuit 201. Here, the frequency conversion unit 15 includes a mixer 91, a local oscillator 92, and a filter 93 such as a band filter or a low-pass filter. The frequency conversion unit 15 converts an input unnecessary radio wave such as electromagnetic noise into an unnecessary radio wave of a predetermined frequency band at a low frequency and outputs it to the A / D converter 16. The A / D converter 16 converts the input unnecessary radio wave, which is analog noise, into a row data R11 of digital noise data represented by a digital value and given a sample number by using a predetermined sampling frequency. Output to the digital output data format converter 17. The digital output data format converter 17 adds predetermined recording conditions R12 (center frequency, sampling frequency, amplifier gain of the low noise amplifier 13, etc .; see FIG. 1) to the input digital noise data row data R11. Is converted to digital noise data having the data format and output to the communication circuit 201. The communication circuit 201 modulates the input digital noise data into a predetermined digital communication signal, and transmits it to the unnecessary radio wave database 30a in the database storage device 30 of the cloud server device 200 via the communication line 211 for storage.

The unnecessary radio wave recording apparatus 10 configured as described above converts unnecessary radio waves such as electromagnetic noise into digital noise data having a predetermined data format and records the digital noise data in the unnecessary radio wave database 30a in the database storage device 30. Can be stored.

The unnecessary radio wave reproducing device 20 includes a communication circuit 202, a digital arbitrary waveform signal generator 21, a filter 22 such as a band filter or a high-pass filter, a high-frequency amplifier 23, and an antenna 24. Here, the digital arbitrary waveform signal generator 21 includes a digital input data format converter 25, a D / A converter 26, and a frequency converter 27. The communication circuit 202 receives predetermined digital noise data from the unnecessary radio wave database 30 a in the database storage device 30 of the cloud server device 200 and outputs it to the digital arbitrary waveform signal generator 21. The digital arbitrary waveform signal generator 21 generates digital noise having a predetermined frequency band based on the recording conditions accompanying the input digital noise data and outputs the digital noise to the D / A converter 26. The D / A converter 26 converts the input digital noise into an analog unnecessary radio wave and outputs it to the frequency converter 27.

The frequency conversion unit 27 includes a mixer 94, a local oscillator 95, and a filter 96 such as a band filter or a high-pass filter. The frequency conversion unit 27 converts the input analog unnecessary radio wave into a high frequency band unnecessary radio wave and passes the predetermined frequency band through a filter 22 such as a band filter or a high pass filter 23. Output to. The high frequency amplifier 23 amplifies the input unnecessary radio wave at a high frequency and radiates it from the antenna 24.

The unnecessary radio wave reproducing device 20 configured as described above can generate and radiate unnecessary radio waves such as electromagnetic noise corresponding to the digital noise data having a predetermined data format in the unnecessary radio wave database 30a. .

In the unnecessary radio wave evaluation system 300 of FIG. 1, for example, in the vicinity of the entire surface of the device that generates the unnecessary radio waves, the unnecessary radio waves in, for example, a mesh-like evaluation section area are measured and recorded. Unnecessary radio waves such as electromagnetic noise are recorded in various operation modes and operating conditions defined for devices that generate unnecessary radio waves. Here, for example, the unnecessary radio wave transmitter and the unnecessary radio wave recording device 10 are arranged in the anechoic chamber, and the measurement data is stored in the unnecessary radio wave database 30a constructed in the cloud server device 200 outside the anechoic chamber via the network. On the other hand, assuming that the evaluated radio communication device is placed in the vicinity of a device that generates unnecessary radio waves, the unnecessary radio wave search device 20 reproduces the unnecessary radio waves searched from the unnecessary radio wave database 30a, and the evaluated radio communication device Performance can be evaluated. The evaluated wireless communication device (unnecessary radio wave receiver) may be expressed by a functional model, and the performance of the evaluated wireless communication device (unnecessary radio wave receiver) may be evaluated by a system simulation including interference due to unnecessary radio waves.

FIG. 2 is a table showing an example of labeled unnecessary radio wave recording data stored in the unnecessary radio wave database 30a of FIG. In FIG. 2, unnecessary radio wave recording data includes a recording ID, an attribute, a device name, a device model, a frequency band, an operation mode, an operation condition, a position coordinate, a frequency, a bandwidth, a recording condition, a data time length, and a file storage location. (Recording data), and the like. As shown in FIG. 2, for the unnecessary radio wave recording data (digital data), various incidental information at the time of recording is given as a label, and stored and stored in the unnecessary radio wave database 30a.

FIG. 3 is a block diagram showing a configuration example of the unnecessary radio wave data feature extraction system 301 according to the embodiment of the present invention. In FIG. 3, the unnecessary radio wave data feature extraction system 301
(1) An input device 41 for inputting unnecessary radio wave feature items S1 and S2,
(2) Based on the input unnecessary radio wave feature items S1 and S2, from the unnecessary radio wave record data R1 (labeled with the unnecessary radio wave data label L1) in the unnecessary radio wave database 30a in the database storage device 30, a predetermined Unnecessary radio wave data analysis computer 40 for extracting unnecessary radio wave feature data F1, F2,
(3) an unnecessary radio wave database 30a in the database storage device 30;
(4) An unnecessary radio wave feature database 50a in the database storage device 50 is provided.
Here, the input device 41 may be a drive device that reads data from a recording medium such as a CD or a DVD in addition to an input device such as a keyboard or a mouse. The

database storage devices

30 and 50 may be stored in the cloud server device 200 as shown in FIG.

Unnecessary radio wave feature items S1 and S2 are, for example,
(1) In-band integrated power,
(2) harmonic integrated power,
(3) non-harmonic components,
(4) Unnecessary radio wave feature data F1 such as a dynamic range and, for example, (5) peak waveform shape,
(6) Peak generation interval,
(7) Waviness shape,
(8) Pattern waveform length,
(9) Unnecessary radio wave feature data F2 such as a pattern generation interval.
The unnecessary radio wave feature data may be configured to include at least one of the items of the unnecessary radio wave feature data F1 and F2.

The unnecessary radio wave data analysis computer 40 is generated by unnecessary radio wave recording data R1 (labeled with an unnecessary radio wave data label L1) in the unnecessary radio wave database 30a based on the input unnecessary radio wave feature items S1 and S2. Predetermined unnecessary radio wave feature data F1 and F2 are extracted from the noise waveform, stored in the unnecessary radio wave feature database 50a in the database storage device 50, and stored. Here, as shown in FIG. 2, the unnecessary radio wave data label L1 includes a device name, a device model, an operation mode, an operation condition, a position coordinate, and the like.

As described above, according to the unnecessary radio wave data feature extraction system 301, the unnecessary radio wave feature item F1 is obtained from the noise waveform of the noise data composed of the unnecessary radio wave record data R1 and the unnecessary radio wave data label L1 in the unnecessary radio wave database 30a. , F2 (determine a group of physical characteristics that characterize unnecessary radio waves and its extraction method), extract unnecessary radio wave feature data F1, F2 from all recorded unnecessary radio wave record data R1,. The feature data of the unnecessary radio wave feature database 50a can be created. In the present embodiment, a plurality of unnecessary radio wave feature items S1 and S2 can be added and defined, and the unnecessary radio wave feature database 50a can be expanded and configured.

FIG. 4 is a block diagram showing a configuration example of the unnecessary radio wave data search system 302 according to the embodiment of the present invention. In FIG. 4, the unnecessary radio wave data search system 302
(1) An input device 41 for inputting unnecessary radio wave recording data R2 composed of digital noise data row data R21, recording condition R22, and unnecessary radio wave characteristic search condition SS1,
(2) Unwanted radio waves in the unnecessary radio wave database 30a in the database storage device 30 using the unnecessary radio wave feature search condition SS1 as a search key based on the input unnecessary radio wave record data R2 and the unnecessary radio wave feature search condition SS1. An unnecessary radio wave data analysis computer 40A for retrieving predetermined unnecessary radio wave feature data F1 from the recorded data R1 (labeled with the unnecessary radio wave data label L1);
(3) an unnecessary radio wave database 30a in the database storage device 30;
(4) An unnecessary radio wave feature database 50a in the database storage device 50 is provided.

The unnecessary radio wave feature search condition SS1 is a characteristic variable such as a dynamic range, for example, and the value may be extracted from the unnecessary radio wave record data R2 to be used as the search condition.

Here, in addition to an input device such as a keyboard or a mouse, the input device 41 may be a drive device that reads data from a recording medium such as a CD or a DVD. The

database storage devices

30 and 50 may be stored in the cloud server device 200 as shown in FIG.

The unnecessary radio wave data analysis computer 40A uses the unnecessary radio wave feature search condition SS1 as a search key based on the input unnecessary radio wave record data R2 and the unnecessary radio wave feature search condition SS1, and uses the unnecessary radio wave database in the database storage device 30. Predetermined unnecessary radio wave feature data F1 is searched from the unnecessary radio wave record data R1 (labeled with the unnecessary radio wave data label L1) in 30a, and the unnecessary radio wave feature data F1 as a search result is stored in the database storage device 50. Stored in the unnecessary radio wave feature database 50a. The unnecessary radio wave feature search condition SS1 is a characteristic variable such as a dynamic range, for example, and may be set as a search condition by extracting the value from the unnecessary radio wave record data R2.

The unnecessary radio wave data analysis computer 40A uses the unnecessary radio wave feature search condition SS1 as a search key based on the input unnecessary radio wave record data R2 and the unnecessary radio wave feature search condition SS1, and uses the unnecessary radio wave in the unnecessary radio wave feature database 50a. The unnecessary radio wave characteristic data F1 that directly corresponds to the characteristic data F1 may be searched, and the unnecessary radio wave data label L1 of the corresponding unnecessary radio wave data may be searched and output.

Here, the unnecessary radio wave feature search condition SS1 includes, for example, each item of the unnecessary radio wave feature data F1.

As described above, according to the unnecessary radio wave data search system 302, the unnecessary radio wave data R1 is searched for unnecessary radio wave data having similar characteristics from the unnecessary radio wave database 30a based on the unnecessary radio wave feature search condition SS1, and the search result is obtained. The unnecessary radio wave feature data F1 as a search result can be searched. Based on this, in addition to the unnecessary radio wave data label L1 such as the corresponding device name, device type, and operating conditions corresponding to this, information such as an unnecessary radio wave countermeasure method (for example, pre-stored in the unnecessary radio wave database 30a) To get. Thereby, it is possible to function as a reverse search function using the unnecessary radio wave characteristic data F1 of the unnecessary radio wave data as a tag.

In the above embodiment, a search result is obtained by searching from the unnecessary radio wave data stored in the unnecessary radio wave database 30a using a predetermined unnecessary radio wave feature search condition that is at least one feature item of the unnecessary radio wave feature data. Is output. Further, unnecessary radio wave feature data stored in the unnecessary radio wave feature database 50a (note that the unnecessary radio wave feature data is associated with (associated with) the unnecessary radio wave data, so From the unnecessary radio wave feature data (similar to the preceding note), the search result is obtained using a predetermined unnecessary radio wave feature search condition that is at least one feature item. Output.

FIG. 5 is a block diagram showing a configuration example of the unnecessary radio wave exposure test system 303 according to the embodiment of the present invention. In FIG. 5, an unnecessary radio wave exposure test system 303 is provided in, for example, an anechoic chamber 80 or an anechoic box, and a database storage device for storing an unnecessary radio wave reproduction device 20, an unnecessary radio wave exposure test device 60, and an unnecessary radio wave exposure test database 70a. 70. The database storage device 70 may be provided in, for example, the cloud server device 200 in FIG.

5, the unnecessary radio wave exposure test apparatus 60 includes an exposed radio communication device 61, a radio signal generation apparatus 62, a radio signal reception apparatus 63, and a radio performance evaluation apparatus 64. As shown in FIG. 1, the unnecessary radio wave reproducing device 20 radiates a corresponding unnecessary radio wave, for example, electromagnetic noise, to the exposed wireless communication device 61 based on the unnecessary radio wave recording data R1 in the unnecessary radio wave database 30a. To be exposed. The radio performance evaluation device 64 in the unnecessary radio wave exposure test device 60 controls the operations of the radio signal generation device 62 and the radio signal reception device 63 to generate a predetermined radio signal in the radio signal generation device 62 and expose radio. In addition to outputting to the communication device 61, the received wireless signal after receiving processing by the exposure wireless communication device 61 is delivered to the wireless signal receiving device 63, which is analyzed by the wireless performance evaluation device 64 and based on a predetermined evaluation condition. By evaluating, for example, the state of the exposure wireless communication device 61 when unnecessary radio waves such as electromagnetic noise are exposed, and the exposure test data T1 as the test result is used as the unnecessary radio wave exposure test database in the database storage device 70. Store and store in 70a. Here, as shown in FIG. 5, the exposure test data T1, which is the test result of the wireless performance evaluation device 64, has an unnecessary radio wave data ID and an evaluation value for each evaluation item.

As described above, according to the unwanted radio wave exposure test system 303, in order to evaluate the coherence of the unwanted radio wave data to the wireless communication device, the unwanted radio wave reproduction device 61 can send the unwanted radio wave data to the actual exposed radio communication device 61. 20 is reproduced and exposed, and communication performance (for example, throughput, error rate, reception sensitivity, etc.) is recorded as an evaluation item.

FIG. 6 is a table showing an example of labeled exposure test data T1 stored in the unnecessary radio wave exposure test database 70a of FIG. In FIG. 6, the exposure test data T1 includes a record ID, an attribute, a device name, a device model, a frequency band, an operation mode, an operation condition, a position coordinate, a frequency, a bandwidth, a test condition, and a file storage location (test data). Have items. As shown in FIG. 6, with respect to the exposure test data (digital data) to the exposure wireless communication device 61 by unnecessary radio wave data, various information at the time of the test is given as a label L2, and stored and stored in the unnecessary radio wave exposure test database 70a. To do.

FIG. 7 is a block diagram showing a configuration example of the unnecessary radio wave exposure test data registration system 304 according to the embodiment of the present invention. In FIG. 7, an unnecessary radio wave exposure test data registration system 304 includes an unnecessary radio wave data analysis computer 40B, an unnecessary radio wave reproduction device 20 and an unnecessary radio wave exposure test device 60 in an anechoic chamber 80, and a database storage having an unnecessary radio wave database 30a. The apparatus 30 includes a database storage device 70 having an unnecessary radio wave exposure test database 70a.

In FIG. 7, the unnecessary radio wave data analysis computer 40B uses the exposure test data labeled with the exposure test data label L2 to evaluate the result of unnecessary radio wave regeneration and exposure to the exposure wireless communication device 61 for the unnecessary radio wave data. By linking as T1, it is registered and stored in the unnecessary radio wave exposure test database 70a. After registration, by using the unnecessary radio wave exposure test database 70a, for a certain wireless communication device (exposed radio communication device 61), by reproducing and exposing unnecessary radio wave data of comprehensive recording conditions, testing, Immunity evaluation is possible. As a result, as will be described later with reference to FIG. 8 and later, it becomes possible to perform reverse extraction of a group of wireless communication devices with high immunity resistance with respect to a group of unnecessary radio wave databases under a certain recording condition.

The exposure test data label T1 includes the device name, device model, operation mode, operation condition, position coordinates, etc., as shown in FIG.

FIG. 8 is a block diagram showing a classification process executed by the unnecessary radio wave exposure test data registration system 304 of FIG. In FIG. 8, the exposure test data in the unnecessary radio wave exposure test database 70a can be classified into the following unnecessary radio wave data using the exposure test data label L2.
(Data A1) Unnecessary radio wave data in which the influence of the exposure test on the exposed wireless communication device 61 does not reach a predetermined threshold condition (not affected by the threshold condition);
(Data A2) Unwanted radio wave data in which the influence of the exposure test on the exposed wireless communication device 61 exceeds the threshold condition (that is, affected by the threshold condition or more).

Here, each data A1, A2 includes unnecessary radio wave recording data R1 labeled with an unnecessary radio wave data label L1 and an exposure test threshold condition P1 or P2. Therefore, according to the unnecessary radio wave exposure test data registration system 304 of FIG. 7, in the exposure test of unnecessary radio wave data for a certain wireless communication device (described in the unnecessary radio wave data label L1), the influence on an evaluation item is the exposure test threshold condition P1. Alternatively, unnecessary radio wave data can be classified using whether or not P2 (threshold) is satisfied as an index.

FIG. 9 is a block diagram showing a configuration example of the unnecessary radio wave exposure test data search system 305 according to the embodiment of the present invention. In FIG. 9, the unnecessary radio wave exposure test data search system 305 includes an unnecessary radio wave data analysis computer 40 </ b> C and an input device 41.

The unnecessary radio wave data analysis computer 40C sets a threshold condition for a certain performance item for a certain radio communication device (exposed radio communication device 61), and sets a test card C1 for exposure radio communication device (unnecessary radio wave data C11 and recording condition C12). Provided) is input from the input device 41, and unnecessary radio wave data matching the exposure test search condition TS1 is searched from the unnecessary radio wave exposure test database 70a, and a search result is obtained, whereby a certain wireless communication device is resistant to interference. Unnecessary radio waves with (immunity) can be extracted and evaluated.

FIG. 10 is a block diagram showing the classification process executed by the unnecessary radio wave exposure test data search system 305 of FIG. In FIG. 10, it can classify | categorize into the following two radio | wireless communication apparatuses by searching from the unnecessary radio wave exposure test database 70a.
(Data B1) Wireless communication device data in which the influence of the exposure test on the exposed wireless communication device 61 does not reach a predetermined threshold condition (not affected by the threshold condition);
(Data B2) Wireless communication device data in which the influence of the exposure test on the exposed wireless communication device 61 exceeds the threshold condition (that is, is affected by the threshold condition or more).

Here, each data B1, B2 includes an exposure test threshold condition P1 or P2 and an exposure test data label L2. Therefore, according to the unnecessary radio wave exposure test data search system 305 of FIG. 9, whether or not the influence on a certain evaluation item exceeds a threshold in an exposure test of a wireless communication device for a certain unnecessary radio wave (described in the unnecessary radio wave data label L1). Wireless communication devices can be classified using the index.

FIG. 11 is a block diagram showing a configuration example of the unnecessary radio wave exposure test data search system 306 according to the embodiment of the present invention. In FIG. 11, the unnecessary radio wave exposure test data search system 306
(1) An input device 41 for inputting unnecessary radio wave recording data R2 composed of digital noise data row data R11 that is unnecessary radio wave data, recording conditions R12, and unnecessary radio wave feature search conditions SS2,
(2) Based on the input unnecessary radio wave record data R2 and the unnecessary radio wave feature search condition SS2, the unnecessary radio wave feature search condition SS2 is used as a search key to store the unnecessary radio wave feature database 50a in the database storage device 50. After searching for unnecessary radio wave data (unnecessary radio wave data group matching the unnecessary radio wave search condition), the exposure test evaluation items and threshold values corresponding to the unnecessary radio wave data are searched from the unnecessary radio wave exposure test database 70a in the database storage device 70. An unnecessary radio wave data analysis computer 40D for searching for a group of wireless communication devices matching the search condition;
(3) an unnecessary radio wave exposure test database 70a in the database storage device 70;
(4) An unnecessary radio wave feature database 50a in the database storage device 50 is provided.

The unnecessary radio wave feature search condition SS2 is a characteristic variable such as a dynamic range, for example, and the value may be extracted from the unnecessary radio wave record data R2 to be used as the search condition.

In FIG. 11, the unnecessary radio wave data analysis computer 40D uses the unnecessary radio wave feature search condition SS2 as a search key based on the unnecessary radio wave record data R2 input by the input device 41 and the unnecessary radio wave feature search condition SS2. After searching for unnecessary radio wave data (unnecessary radio wave data group matching the unnecessary radio wave search condition) in the unnecessary radio wave feature database 50a in the database storage device 50, the unnecessary radio wave exposure test database 70a in the database storage device 70 is searched for the unnecessary radio wave data. A search is made for a group of wireless communication devices that match the exposure test evaluation items and threshold search conditions corresponding to the radio wave data, and the search results are output to an output unit such as a display. The unnecessary radio wave feature search condition SS2 is a feature variable such as a dynamic range, for example, and the value may be extracted from the unnecessary radio wave record data R2 to be used as the search condition.

As described above, according to the unnecessary radio wave exposure test data search system 306 in FIG. 11, unnecessary radio wave data having similar characteristics is searched from the unnecessary radio wave feature database 50a for certain unnecessary radio wave data based on the unnecessary radio wave feature condition SS2. To do. With respect to the unnecessary radio wave data searched above, a radio communication device whose influence on a certain performance evaluation item exceeds (or does not exceed) a threshold is searched from the unnecessary radio wave exposure test database 70a. As a result, it is possible to evaluate the coherence of the original unnecessary radio wave data to the radio communication device, and to search for radio communication devices that are subject to radio wave interference.

FIG. 12 is a perspective view showing a specific example in which unnecessary radio wave data is recorded in the anechoic chamber 80 using the unnecessary radio wave recording apparatus 10 of FIG. In FIG. 12, an unnecessary radio wave transmitter 19 that is an unnecessary radio wave source is placed in an anechoic chamber 80 that is a laboratory, and an unnecessary radio wave recording device 10 is disposed in the vicinity thereof. In the specific example of FIG. 12, the unnecessary radio wave transmitter 19 is accommodated in a large cabinet of 0.5 m × 0.5 m × 2.0 m, for example.

The unnecessary radio wave recording device 10 is attached to the three-dimensional scanning device 18, and in the vicinity of the surface of the unnecessary radio wave transmitter 19, for example, the unnecessary radio wave is recorded in each area (recorded at a three-dimensional coordinate position) of a rectangular mesh evaluation section area. Is scanned in three dimensions by the three-dimensional scanning device 18. At this time, the unnecessary radio wave recording apparatus 10 measures and records the unnecessary radio wave in a frequency band of interest. Here, in various operation modes and operating conditions stipulated in the unnecessary radio wave transmitter 19, the cloud server outside the anechoic chamber 80 is recorded with the above-mentioned recording items and the measured unnecessary radio wave data is transmitted via the network. It is stored in the unnecessary radio wave database 30a constructed in the device 200.

FIG. 13 is a table showing an example of labeled unnecessary radio waves acquired by the unnecessary radio wave recording apparatus 10 of FIG. As shown in FIG. 13, various types of information at the time of recording are assigned as label L1 for unnecessary radio wave recording data (digital data), and stored and stored in the unnecessary radio wave database 30a.

FIG. 14 is a perspective view showing a specific example of recording unnecessary radio wave data using the unnecessary radio wave recording apparatus 10 of FIG. 1 on a laboratory table. In FIG. 14, an unnecessary radio wave transmitter 19 is placed on a laboratory table. Here, in the specific example of FIG. 14, an example of a wireless sensor module having a size of, for example, 5 cm × 10 cm × 1 cm is shown.

FIG. 15 is a table showing an example of labeled unnecessary radio waves acquired by the unnecessary radio wave recording apparatus 10 of FIG. As shown in FIG. 15, for the unnecessary radio wave recording data (digital data), various information at the time of recording is given as a label L1, and stored and stored in the unnecessary radio wave database 30a.

FIG. 16 is a perspective view showing a specific example of reproducing unnecessary radio wave data using the unnecessary radio wave reproducing device 20 of FIG. 1 on a laboratory table. In FIG. 16, an unnecessary radio wave receiver 29, which is a non-evaluation wireless communication device, is placed on a laboratory table. Here, in the specific example of FIG. 16, an example of a mobile communication module having a size of, for example, 5 cm × 10 cm × 1 cm is shown.

The unnecessary radio wave reproducing device 20 is attached to the three-dimensional scanning device 28, and the unnecessary radio wave receiver 29 is arranged in the vicinity of the surface of the unnecessary radio wave receiver 29. The three-dimensional scanning device 28 scans in three dimensions so that unnecessary radio waves can be received by recording at a position. At this time, the unnecessary radio wave reproducing device 20 reproduces the unnecessary radio wave in a frequency band to which attention is paid, and receives and evaluates the unnecessary radio wave exposure test system 303 in FIG. 8 to obtain the exposure test data T1 to obtain the unnecessary radio wave exposure test database. 70a is stored. That is, the unnecessary radio wave data searched by the unnecessary radio wave reproducing device 20 from the unnecessary radio wave database 30a on the assumption that the unnecessary radio wave receiver 29, which is an evaluated radio communication device, is placed in the vicinity of the device that generates the unnecessary radio wave. Reproduce unnecessary radio waves based on, and evaluate the performance of the radio. In addition, it is preferable that the unnecessary radio wave receiver 29 and the unnecessary radio wave reproducing device 20 which are wireless communication apparatuses to be evaluated are disposed inside the anechoic chamber 80 or the anechoic box.

FIG. 17 is a block diagram showing a configuration example of the unnecessary radio wave reproduction emulator device 20E according to the embodiment of the present invention. In FIG. 17, an unnecessary radio wave reproduction emulator device 20E includes an unnecessary radio wave generation circuit module 101, a combiner 102, a radio reception circuit module 103, a baseband signal processing circuit module 104, and a system simulator 100 for evaluating the performance of radio communication equipment. And a communication radio signal generation circuit module 105.

In FIG. 17, the unnecessary radio wave generation circuit module 101 receives predetermined unnecessary radio wave data in the unnecessary radio wave database 30a in the database storage device 30, and generates unnecessary radio waves such as electromagnetic noise based on the unnecessary radio wave feature data. Output to the combiner 102. The communication radio signal generation circuit module 105 generates a predetermined communication radio signal under the control of the system simulator 100 and outputs it to the combiner 102. The combiner 102 synthesizes the input signal and noise and outputs the synthesized signal to the wireless reception circuit module 103. After receiving the input signal and noise, the wireless reception circuit module 103 performs processing such as low noise amplification and low frequency conversion, and outputs the processed signal and noise to the baseband signal processing circuit module 104. The baseband signal processing circuit module 104 performs baseband processing such as demodulation on the input processed signal and noise and outputs the result to the system simulator 100. Based on the input signal and noise, the system simulator 100 evaluates the influence of coherence that the noise has on the signal, and displays and outputs the evaluation result on an output unit such as a display.

As described above, according to the unnecessary radio wave reproduction emulator device 20E, based on the unnecessary radio wave data in the unnecessary radio wave database 30a on the assumption that the wireless communication device to be evaluated is placed in the vicinity of the device that generates the unnecessary radio wave. It is possible to reproduce unnecessary radio waves and evaluate the performance of wireless communication devices (performance such as interference with unnecessary radio waves).

FIG. 18 is a perspective view showing measurement of unnecessary radio waves using the unnecessary radio wave evaluation system 300 according to the embodiment and evaluation of radio communication interference due to unnecessary radio waves. In FIG. 18, for example, in an anechoic chamber 80 of 10 m class, unnecessary radio wave data such as electromagnetic noise from an unnecessary radio wave transmitter such as an electric vehicle 19A or a wireless power feeding device 19B is recorded by the unnecessary radio wave recording device 10 to create unnecessary radio wave data. And stored in the unnecessary radio wave database 30a. On the other hand, in the laboratory 80A remote from the anechoic chamber 80, unnecessary radio waves such as electromagnetic noise are generated by the unnecessary radio wave reproducing device 20 based on the unnecessary radio wave data in the unnecessary radio wave database 30a, and wireless communication that is a non-evaluation radio communication device. It can be emitted to the device 103A and simulated by the wireless communication simulator 100A to evaluate the coherence and the like.

That is, according to the present embodiment, it is possible to realize a technique for separating “measurement of unnecessary radio waves” and “evaluation of radio communication interference by unnecessary radio waves” in space and time. Here, unnecessary radio wave data recorded in advance is reproduced in a wireless communication environment, and interference is evaluated. It can support various forms such as an experiment site (remote anechoic chamber, etc.) suitable for a noise source device, and variations of wireless communication devices (with / without noise countermeasures, multiband, actual machine and simulation model).

FIG. 19 is a perspective view showing the development of a wireless communication device using the unnecessary radio wave evaluation system 300 according to the embodiment and the design support of the unnecessary radio wave. In FIG. 19, for example, in development of a wireless communication device, unnecessary radio wave data is recorded by the unnecessary radio wave recording device 10 and is stored in the unnecessary radio wave database 30a. On the other hand, in the unnecessary radio wave design support, the unnecessary radio wave reproduction device 20 generates an unnecessary radio wave such as electromagnetic noise and radiates it to a wireless communication device which is a non-evaluation wireless communication device, for measures such as a predetermined design change. Evaluation of coherence and the like can be performed.

In other words, in the development of new wireless communication devices, search for similar cases, reference cases, and parameter cases for the generation of unnecessary radio waves (electric vehicle noise) in the past development of wireless communication devices and unnecessary radio wave countermeasures and their effects from the unnecessary radio wave database 30a. Thus, it is possible to support noise design (device design that obtains noise performance such as noise reduction and noise resistance).

Therefore, in the development of unnecessary radio wave (noise) countermeasure members, it is possible to search noise countermeasure examples in past wireless communication device development from the unnecessary radio wave database 30a and support decision making such as material characteristics and structural design.

In the above embodiment, the unnecessary radio wave

data analysis computers

40, 40A, 40B, 40C, and 40D are configured by control means such as a digital computer.

The present inventors made a prototype of Example 1 for recording and reproducing unwanted radio waves, and obtained experimental results as follows (for example, see Non-Patent Documents 2 to 4).

For example, it was confirmed that harmonics of the 25,000th order or higher of an 80 kHz rectangular wave exist in the 2.12 GHz reception band. The effect on reception performance was evaluated by the following method.
(Method 1) Hardware-in-the-loop (HILS) simulation;
(Method 2) Communication system simulation based on RF circuit behavior description model.

FIG. 20A is a graph showing an evaluation example of LTE reception sensitivity, which is a HILS simulation result by recording and reproduction of unnecessary radio waves according to the first embodiment. FIG. 20B is a graph showing an evaluation example of LTE reception sensitivity, which is a function simulation result by recording and reproducing unnecessary radio waves according to the first embodiment. FIG. 20A shows the minimum received power in the LTE band. The reference signal level was −104 dBm and the noise level was −90 dBm. FIG. 20B shows the minimum received power in LTE band 1, the reference signal level was −104.1 dBm, and the noise level was −89.9 dBm. As a result, the inventors of the present invention have confirmed the coincidence between “emulation including an actual device using HILS” and “full simulation using a functional model” for evaluation of LTE reception sensitivity (Band 1) by recording and reproduction of unnecessary radio waves.

In the second embodiment, an evaluation of unnecessary radio waves and interference with mobile communication in the vicinity of the inverter power supply device will be described below.

In recent years, it is predicted that the amount of wireless communication will increase rapidly, and the frequency used for wireless communication will continue to expand. On the other hand, the spread of new radio wave devices such as high-speed power devices, inverter devices using them, and wireless power supply (hereinafter referred to as WPT) is expected, and unnecessary radio waves in the vicinity of these devices There is a risk that noise interference on the radio signal will become apparent.

In the present Example 2, while evaluating the interference with the LTE mobile communication of the unnecessary radio wave radiated | emitted from the inverter power supply device for WPT, the noise suppression sheet | seat (henceforth NSS) of the composite structure by which the magnetic flat powder was disperse | distributed in the polymer For example, the “electromagnetic shielding sheet” shown in FIG. 19) is evaluated.

(Evaluation of generation and reduction of unnecessary radio waves)
An unnecessary radio wave of a 7 kW class WPT power supply device (hereinafter referred to as DUT) having a switching frequency of 87.5 kHz using a GaN element was measured. When the magnetic field in the vicinity of the DUT was measured, unnecessary radio waves were observed at the strongest level where the control CPU board was mounted. At this position, horn antennas are used to observe unnecessary radio waves over a wide band of 0.5 to 6 GHz. In particular, the horizontal distance from the DUT is set to 0.1 to Unnecessary radio waves were measured with a change of 4 m. Next, NSS that absorbs radiated noise is attached to an aluminum punching metal (thickness: 0.8 mm, hole diameter 5 mm, pitch 8 mm), and the control CPU board is covered by opening at the same position and size as the punching metal. It was. FIG. 21 shows the distance dependency from the DUT before and after noise suppression.

FIG. 21 is a graph showing the distance dependence of the unnecessary radio wave intensity before and after the countermeasure by the noise suppression sheet according to the second embodiment. As can be seen from FIG. 21, it was confirmed that the unnecessary radio wave radiated can be suppressed by about 25 dB at maximum by the noise countermeasure used this time. The intensity of unnecessary radio waves was calibrated for the amplification gain and cable loss of the measurement system.

(Evaluation of mobile communication interference due to unnecessary radio waves)
We evaluated the effect of unwanted radio waves on wireless communication in a predetermined wireless communication performance analysis environment using a wireless communication system simulator. FIG. 22 shows the evaluation results of the effect on the wireless communication of the noise observed at the DUT-dipole antenna distance of 0.1 m in the 840 MHz band where the noise intensity was highest before the noise countermeasure.

FIG. 22 is a graph showing the effect of unnecessary radio waves on wireless communication quality according to the second embodiment. As is clear from FIG. 22, it was confirmed that the influence on wireless communication was reduced by NSS and the minimum reception sensitivity -100 dBm / 5 MHz defined by 3GPP was satisfied.

As described above, according to Example 2, the interference of unnecessary radio waves observed in the vicinity of a 7 kW class WPT inverter power supply device using a GaN element on wireless communication was evaluated. In addition, we evaluated the noise countermeasure effect by NSS using mobile communication performance as an index, and clarified that the reduction of unnecessary radio waves leads to the improvement of the minimum reception sensitivity of the receiver. In this way, by recording and collecting measurement data of unnecessary radio waves before and after noise countermeasures, the measurement data is read into a wireless communication system simulation, thereby evaluating the effect of noise countermeasures using mobile communication performance as an index. be able to.

As described in detail above, all IoT devices are made wireless, and not only communication but also power is transmitted and received wirelessly. In the development of IoT devices, confirmation of noise tolerance and construction of noise countermeasures are indispensable, and they are industrially used as a development environment for this purpose. By collecting noise information of a large number of devices as big data as a noise database, it is possible to derive universal noise countermeasures or automatically extract optimum noise countermeasures for each device.

10 Unnecessary radio wave recording device,
11 Antenna,
12 filters,
13 Low noise amplifier
14 Digital spectrum analyzer,
15 frequency converter,
16 A / D converter,
17 Digital output data format converter,
18 Three-dimensional scanning device,
19 Unnecessary radio wave transmitter,
19A Electric car,
19B wireless power feeder,
20 Unnecessary radio wave playback device,
21 Digital arbitrary waveform signal generator,
22 filters,
23 High frequency amplifier,
24 antenna,
25 Digital input data format converter,
26 D / A converter,
27 Frequency converter,
28 three-dimensional scanning device,
29 Unnecessary radio wave receiver,
30 database storage,
30a Unnecessary radio wave database,
40, 40A, 40B, 40C, 40D Unnecessary radio wave data analysis computer,
41 input devices,
50 database storage,
50a Unnecessary radio wave feature database,
60 Unwanted radio wave exposure test equipment,
61 Exposure radio communication equipment,
62 wireless signal generator,
63 wireless signal receiver,
64 wireless performance evaluation device,
70 database storage,
70a Unnecessary radio wave exposure test database,
80 Anechoic chamber,
91 mixer,
92 local oscillator,
93 filters,
94 mixer,
95 Local oscillator,
96 filters,
100 system simulator,
100A wireless communication simulator,
101 Unnecessary radio wave generation circuit module,
102 Combiner,
103 wireless receiver circuit module,
103A wireless communication device,
104 baseband signal processing circuit module,
105 wireless signal generation circuit module for communication,
200 cloud server device,
201, 202, 203 communication circuit,
211, 212 communication lines,
300 Unnecessary radio wave evaluation system,
301 Unnecessary radio wave data feature extraction system,
302 Unnecessary radio wave data search system,
303 Unwanted radio wave exposure test system,
304 Unnecessary radio wave exposure test data registration system,
305 Unnecessary radio wave exposure test data search system,
306 Unwanted radio wave exposure test data search system,
C1 Test card for exposed wireless communication equipment,
F1, F2 Unnecessary radio wave feature data,
L1 Unnecessary radio wave data label,
L2 exposure test data label,
P1, P2 exposure test threshold conditions,
R1, R2 Unnecessary radio wave recording data,
R11, R21 row data,
R12, R22 recording conditions,
S1, S2 Unnecessary radio wave feature extraction conditions,
SS1, SS2 Unnecessary radio wave feature search condition,
T1 exposure test data,
TS1 Exposure test search condition.

Claims

An unnecessary radio wave evaluation system comprising a first storage device for storing an unnecessary radio wave database for storing unnecessary radio wave data,
In a plurality of areas near the device that generates the unwanted radio waves, the unwanted radio waves are measured under predetermined recording conditions, and the unwanted radio wave data including the unwanted radio wave digital data and the recording conditions is recorded as a measurement result. An unnecessary radio wave recording device stored in the unnecessary radio wave database;
An unnecessary radio wave evaluation system comprising: an unnecessary radio wave reproduction device that reproduces unnecessary radio waves corresponding to unnecessary radio wave data stored in the unnecessary radio wave database.
A second storage device for storing an unnecessary radio wave feature database including predetermined unnecessary radio wave feature data;
A feature is extracted from the unnecessary radio wave data stored in the unnecessary radio wave database as unnecessary radio wave feature data for at least one feature item of the unnecessary radio wave feature data, and the unnecessary radio wave feature data is stored in the unnecessary radio wave feature database. The unnecessary radio wave evaluation system according to claim 1, further comprising: a control unit.
A search result is output by searching from the unnecessary radio wave data stored in the unnecessary radio wave database using a predetermined unnecessary radio wave feature search condition that is at least one feature item of the unnecessary radio wave feature data. The unnecessary radio wave evaluation system according to claim 1, further comprising a control unit.
A search result is output by searching from the unnecessary radio wave feature data stored in the unnecessary radio wave feature database using a predetermined unnecessary radio wave feature search condition that is at least one feature item of the unnecessary radio wave feature data. The unnecessary radio wave evaluation system according to claim 2, comprising two control means.
The apparatus further comprises third control means for generating exposure test data including an evaluation value of the exposed wireless communication device when the unnecessary radio wave is played back to a predetermined exposed wireless communication device by the unnecessary radio wave reproducing device. The unnecessary radio wave evaluation system according to claim 1, wherein:
6. The unnecessary radio wave evaluation system according to claim 5, wherein the third control means generates the exposure test data by simulating the exposed wireless communication device.
A third storage device for storing an exposure test database including the exposure test data;
The unnecessary radio wave evaluation system according to claim 5 or 6, wherein the third control means stores the exposure test data in the exposure test database.
Based on the exposure test data in the exposure test database, the third control means determines whether the influence of the exposure test does not reach a predetermined threshold condition for unnecessary radio wave recording data of a predetermined exposure wireless communication device. 8. The unnecessary radio wave evaluation system according to claim 7, wherein the radio wave is classified and output according to the classification.
8. The unnecessary radio wave evaluation according to claim 7, wherein the third control means searches for the corresponding unnecessary radio wave data from exposure test data in the exposure test database using a predetermined exposure test search condition. system.
Based on the exposure test data in the exposure test database, the third control means classifies the wireless communication device that does not reach the predetermined threshold condition and the wireless communication device that exceeds the threshold condition based on the exposure test data. The unnecessary radio wave evaluation system according to claim 7, wherein the unnecessary radio wave evaluation system is output.
The unnecessary radio wave evaluation system according to claim 2, and the unnecessary radio wave evaluation system according to claim 7,
The third control means uses an unnecessary radio wave corresponding to the wireless communication device in the exposure test data in the exposure test database using a predetermined unnecessary radio wave feature search condition from the unnecessary radio wave feature data in the unnecessary radio wave feature database. An unnecessary radio wave evaluation system characterized by searching feature data.
An unnecessary radio wave evaluation system comprising a first storage device for storing an unnecessary radio wave database for storing unnecessary radio wave data,
An unnecessary radio wave evaluation system comprising an unnecessary radio wave reproducing device for reproducing unnecessary radio waves corresponding to unnecessary radio wave data stored in the unnecessary radio wave database.
And 3rd control means for generating exposure test data including an evaluation value of the exposed wireless communication device when the unnecessary radio wave is played back to a predetermined exposed wireless communication device by the unnecessary radio wave reproducing device. The unnecessary radio wave evaluation system according to claim 12, wherein the control means 3 generates the exposure test data by simulating the exposed wireless communication device.