JPH0712925A - Radio wave reverse detection device - Google Patents

Abstract

(57) [Summary] [Purpose] To identify received radio waves more accurately. [Structure] The received radio wave is measured for each attribute, and the measurement result is stored in the measurement radio wave specification memory 2. On the other hand, the identification table 3 stores attribute data of radio waves obtained by measurement, attribute data obtained by statistics, and attribute data obtained by estimation for each sensor or the like.
The attribute data of the measurement radio wave specification memory 2 is the identification table 3
Matching rate calculators 10 to 1 based on the metallic data of
2, the match rate is calculated, and the match rate calculation result memory 6
Memorized in. Then, the match result determination device 7 selects from the identification table 3 the attribute data corresponding to the highest match rate among the match rates in the memory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave reverse detection device for identifying a radio wave transmission source such as a radar.

[0002]

2. Description of the Related Art FIG. 10 is a circuit block diagram showing a conventional radio wave reverse detection apparatus. In FIG. 10, 1 is an input end for inputting attribute data such as frequency, PRI (pulse repetition interval), PW (pulse width), spectrum width, etc. measured from the received radio waves, and 2 stores these attribute data. Measurement radio wave specification memory, 3 is a frequency of a predetermined radio wave input in advance, PRI (pulse repetition interval), PW
An identification table as an identification determination reference database that stores attribute data such as (pulse width), 4 is a data extracting device that sequentially reads the attribute data from the identification table 3, 5
Is a match rate calculation device for calculating a match rate for each attribute data based on the attribute data from the measured radio wave specification memory 2 and the attribute data from the measured radio wave specification memory 2 by the data extraction device 4, and 6 is a match rate A match rate calculation result memory that stores the match rate for each attribute data calculated by the calculator 5;
Is a match result determination device that selects the largest match rate from the match rates in the match rate calculation result memory 6 and outputs information such as attribute data of the identification table 3 corresponding to the selected match rate, and 8 is a selection result. This is an output end for outputting information such as attribute data to a CRT device or the like.

Next, the operation of this conventional radio wave reverse detection apparatus will be described. First, the received radio wave is converted into an electric signal, and frequency, PRI (pulse repetition interval), PW
(Pulse width) and spectral width attributes are measured. Then, those attribute data are sequentially stored in the measurement radio wave specification memory 2 via the input terminal 1. On the other hand, in the identification table 3, attribute data of radio waves measured by the operator,
Attribute data obtained from other information is entered in advance. Next, the data extraction device 4 sequentially reads all the attribute data of the identification table 3 and outputs them to the matching rate calculation device 5. The matching rate calculation device 5 is the data extraction device 4
Attribute data from, for example, the frequency, PRI (pulse repetition interval), and pulse width of the radio wave received by the sensor A, and the frequency, P, of the radio wave received by the sensor B next.
The matching rate is calculated in the order of RI (pulse repetition interval) and pulse width, and stored in the matching rate calculation result memory 6. This matching rate is 1 if the frequency range of the actually measured radio wave from the measured radio wave specification memory 2 (value from the lower limit to the upper limit) is included in the frequency range of a certain radio wave from the identification table 3.
It is calculated as 00% and 0% if not included. The match result determination means 7 refers to the calculation result of the match rate calculation result memory 6 and, for example, in the above example, 100% corresponds to the calculated match rate, the attribute data of the identification table 3 and the radio wave having the attribute data. Information is read and output to the output terminal 8. Then, the output attribute data and the information of the radio wave having this attribute data are displayed on the CRT or the like, and the operator is notified of the identification result of the received radio wave.

[0004]

Since the conventional radio wave reverse detection device is configured as described above, the coincidence rate can be calculated only from the input radio wave in a unified manner. That is, the matching rate is set to 100% only when the frequency range of a certain radio wave from the measured radio wave specification memory 2 is included in the frequency range of a certain radio wave from the identification table 3, and when it is not included, the matching rate is 0. %. However, since there are various types of attribute data set in the identification table 3, the matching rate is 100% (1) or the matching rate is 0%.
There is a problem that it is difficult to improve the accuracy of identifying the input radio wave in the unitary calculation of the match rate (0). Therefore, for example, while the attribute data information is relatively ambiguous, the matching rate by the attribute data of the identification table 3 in which the frequency range is set wide is high, while the frequency range is set narrow. The matching rate due to accurate attribute data is low.

The present invention has been made in order to solve the above-mentioned problems, and a more accurate identification can be made by switching the identification determination calculation method according to the attribute data of the information source of the identification table set by the operator. An object is to obtain a radio wave reverse detection device that can obtain a determination result.

[0006]

The radio wave reverse detection apparatus according to the first aspect of the present invention uses attribute data prepared in advance as attribute data obtained from measurement, attribute data obtained from statistics and attribute data obtained from estimation. Consistency rate calculation means (match rate calculation device 10 or the like) configured and stored in the identification table, and based on all the attribute data of the identification table, calculates the rate of coincidence with the attribute data of the radio wave received from the measurement radio wave memory. ).

The radio wave reverse detection apparatus according to the second invention is
When the match rate calculating means obtains the match rate of the received radio waves from the measured radio wave memory based on the attribute data obtained from the estimation from the identification table, the numerical range of the attribute data of the identification table, and The range in which the attribute data from the measured radio wave memory and the numerical range of the same type of attribute data overlap is obtained by dividing the range by the numerical range of the identification table. In the radio wave reverse detection device according to the third aspect of the present invention, when the accuracy of the radio wave received from the measurement radio wave memory is poor in the identification table, the numeric value range changing means 8 for changing the numeric value range of the attribute data of the identification table is provided.
The configuration is such that 0 is added.

The radio wave reverse detection apparatus according to the fourth invention is
When the matching rate calculation means obtains the matching rate of the received radio waves from the measurement radio wave memory based on the attribute data obtained from the estimation from the identification table, the numerical range of the attribute data from the identification table is The configuration is obtained by dividing by the difference between the central value of the numerical range and the central value of the numerical value of the attribute data of the same kind as the attribute data from the measured radio wave memory. In the radio wave reverse detection device according to the fifth aspect of the present invention, the matching rate result determining means learns based on the matching rate of the radio waves from the matching rate result determining means, and attribute data obtained from statistics of the identification table. And a learning means 90 for rewriting the attribute data obtained from the estimation. In the radio wave backward detection device according to the sixth aspect of the present invention, the matching rate result determining means learns based on the matching rate of the radio waves from the matching rate calculating means, and the matching result determining means determines the matching rate result determining means. The learning means 90 for determining the range of the value of the matching rate of the attribute data to be selected and the attribute data prepared in advance is added.

[0009]

In the radio wave reverse detection device according to the first aspect of the present invention, radio wave attribute data is prepared in advance in the identification table. This attribute data consists of attribute data obtained from measurement, attribute data obtained from statistics, and attribute data obtained from estimation. Next, by the match rate calculating means (match rate calculating device 10 or the like),
Based on all the attribute data of this identification table, the matching rate with the attribute data of the radio wave received from the measurement radio wave memory is calculated. Then, of these matching rates, information such as attribute data in the identification table corresponding to the highest matching rate is the identification result.

The radio wave reverse detection apparatus according to the second invention is
By dividing the range in which the numerical range of the attribute data of the identification table and the numerical range of the attribute data of the same kind as the attribute data from the measured radio wave memory overlap by the numerical range of the identification table, The matching rate in the attribute data is calculated. In the radio wave reverse detection device according to the third aspect of the present invention, when the accuracy of the radio wave received from the measurement radio wave memory is poor, the numerical range changing means 80 changes the numerical range of the attribute data of the identification table.

The radio wave reverse detection apparatus according to the fourth invention is
By dividing the numerical range of the attribute data from the identification table by the difference between the central value of this numerical range and the central value of the numerical range of the attribute data of the same kind as the attribute data from the measured radio wave memory, the received radio wave The matching rate in the attribute data of is calculated. In the radio wave reverse detection device according to the fifth aspect of the present invention, the learning means 90 learns based on the matching rate of the radio waves from the matching rate result determining means, and obtains it from the attribute data and the estimation obtained from the statistics of the identification table. Rewrite the attribute data. In the radio wave reverse detection device according to the sixth aspect of the present invention, the learning unit 90 performs learning based on the matching rate of the radio waves from the matching rate calculation unit, and the attribute selected by the matching rate result determination unit based on the learning result. Decide the range of the value of the matching rate of the data and the attribute data prepared in advance.

[0012]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a block diagram of a radio wave reverse detection apparatus according to Embodiment 1 of the present invention. In FIG. 1, 1 is an input terminal,
Frequency, PRI (pulse repetition interval), PW obtained by measuring the radio waves received by the antenna with a signal processing device, etc.
Input attribute data such as (pulse width) and spectrum width. Reference numeral 2 denotes, for example, a first-in first-out (FIFO) measurement radio wave specification memory, which sequentially stores attribute data of radio waves from the input terminal 1. Reference numeral 3 denotes an identification table, which is a database for referring to the identification determination for identifying the radio wave. The attribute data in this identification table is data that has been input in advance by the operator, and is classified by each sensor that receives radio waves, obtained by measurement (actual measurement), obtained by statistics, and obtained by estimation. Attribute data.
Reference numeral 4 is a data fetching device for sequentially fetching the attribute data from the identification table 3, and 9 is a switching device for sequentially distributing the attribute data fetched by the data fetching device 4. 10 is a match rate calculation device that calculates a match rate by performing a predetermined calculation based on measured (actually measured) attribute data, and 11 is a match that calculates a match rate by performing a predetermined calculation based on attribute data obtained from statistics. A rate calculation device, 12 is a match rate calculation device for calculating the match rate based on the attribute data obtained from the estimation,
9 to 12 described above constitute the matching rate calculation means.

Reference numeral 6 denotes a match rate calculation result memory, which sequentially stores the match rates corresponding to the attribute data calculated by the match rate calculation devices 10 to 12 having a match rate of a certain value or more. Normally, a match rate of 75% or more is to be stored, but the match rate value to be stored is variable depending on the balance between the measured value and the setting value of the identification table. (For example, it is changed by learning.) 7 is a match result determination device,
Among the matching rates stored in the matching rate calculation result memory 6, the highest matching rate is selected, and the attribute data corresponding to the matching rate and the information having this attribute data, such as sensor name and radar name, are identified. Read from the table. An output terminal 8 outputs the attribute data and other information read by the match result determination device 7 to the CRT, and notifies the operator of the received radio wave discrimination result.

FIG. 2 shows the data structure of the identification table 3. In FIG. 2, sensors A to N are sensor names that receive radio waves, and the attribute data includes frequency, PRI (pulse repetition interval), and P for each sensor name.
It is divided into W (pulse width) items, and S1 for each
~ S6, S10 to S15, P1 to P6, P10 to P1
Data of 5, K1 to K6 and K10 to K15 are stored. Further, these data are further divided into actual measurement values, statistical values, and estimated values. The actual measurement value is actually measured from the radio wave received by the sensor A, and the radio wave specifications of the radio wave oscillation source to be measured are reliable. For example, it is a radio wave of a radar emitted by a passenger plane or a fighter in its own country. The statistical values are data collected and analyzed by other sensors (for example, sensor N) other than the own sensor A over a long period of time. In addition, the estimated value is data based on the estimation obtained from the performance value of the literature. In this way, not all measured values, statistical values, and estimated values can be obtained by the sensor.
Match with the table value in the set range.

3 to 5 are views for explaining the method of calculating the matching rate by the matching rate calculation devices 10 to 12. The matching rate calculation device 10 calculates the matching rate as follows based on the measured value of the identification table 3 from the attribute data by the received radio wave from the measured radio wave specification memory 2. That is, in FIG. 3, for example, the measured value of the frequency obtained from the measured radio wave specification memory 2 of FIG. 1 has a numerical range from the lower limit 20b to the upper limit 20d, and the table value of the frequency stored in the identification table 3 (actual measurement When the values S1 to S2) have a numerical range from the lower limit 20a (S1) to the upper limit 20c (S2), the matching rate calculation device 10 determines that the center value 20e of the actual measurement values obtained from the measured radio wave specification memory 2 is the lower limit 20a. From the upper limit 20c is determined. If it is within the numerical range, the matching rate is 100%, and if it is not within the numerical range, the matching rate is 0%.

The matching rate calculating device 11 calculates the matching rate with the attribute data of the received radio wave from the measured radio wave specification memory 2 based on the statistical value of the identification table 3. The statistical value (table value) of the identification table 3 shows a normal distribution as shown in FIG. The matching rate calculation device 11 calculates the matching rate as follows. First, the difference 30e between the central value 30d of the numerical value range from the lower limit 30a to the upper limit 30c of the table value and the central value 30b of the numerical value range from the lower limit 30f to the upper limit 30g of the measured value measured from the received radio wave is calculated. Then, for example, this difference 30e is set to (1 /
It is calculated by dividing by 2), subtracting the result smaller than 1 from 1 out of the divided results, and multiplying by 100.

The matching rate calculating device 12 calculates the matching rate with the attribute data of the received radio wave from the measured radio wave specification memory 2 based on the estimated value of the identification table 3. This matching rate is calculated based on the most ambiguous information, for example, information obtained from documents and the like, and is calculated as follows. That is, as shown in FIG. 5, first, the numerical range from the lower limit value 40a to the upper limit value 40b of the measured value measured from the received radio wave and the numerical range from the lower limit 40c to the upper limit 40d of the table value by the estimated value are The overlapping ranges 40c to 40f are calculated. Then, the matching rate is calculated by dividing the value of the overlapping range 40c to 40f by the value of the table value range 40c to 40d based on the estimated value.

Next, the operation of the radio wave reverse detection apparatus according to the first embodiment will be described. First, by the operator, for each sensor that received a radio wave, the frequency of the radio wave, P
RI (pulse repetition interval) and PW (pulse width) attribute data (FIG. 2) are input. These data include measured values, statistical values, and estimated values. Next, from the received radio wave, frequency, PRI (pulse repetition interval),
The attribute of PW (pulse width) is measured, and the attribute data is sequentially stored in the measured radio wave specification memory 2 via the input end 1. The data extraction device 4 uses the identification table 3 to determine the frequency, PRI (pulse repetition interval), and PW for each sensor.
The (pulse width) attribute data is sequentially sent to the matching rate calculation devices 10 to 12 via the switching device 9. The matching rate calculation devices 10 to 12 are based on the attribute data (measurement value) of the received radio wave from the measurement radio wave specification memory and the actual measurement value, the statistical value, and the estimated value from the identification table 3, and the above-described FIGS. 5
The matching rate for each attribute data is calculated by the calculation method of (1) and output to the matching rate calculation result memory 6. The match rate calculation result memory 6 stores, for example, a match rate of 75% or more among the match rates from the match rate calculation devices 10 to 12. The match result determination device 7 selects the maximum match rate from the match rates from the match calculation result memory 6, reads the attribute data information (including the radar name, etc.) of the identification table 3 corresponding to the match rate, It is displayed on a CRT or the like via the output terminal 8. Looking at this display, the operator knows the attribute of the received radio wave and what the source is.

FIG. 6 is a block diagram of a radio wave reverse detection apparatus according to Embodiment 2 of the present invention. In FIG. 6, numeral 80 is a numerical range changing means, and the other structure is the same as that of the apparatus according to the first embodiment. In the apparatus according to the second embodiment, when the match rate calculating apparatus 12 obtains the match rate, the estimated value serving as the basis can be changed as shown in FIG. The matching rate calculation device 12 calculates the matching rate as follows. That is, the lower limit 60a of the measured value by the received radio wave of the measurement radio wave specification memory 2
To the upper limit 60b and the overlapping range 60e to 60f of the numerical range from the lower limit 60c to the upper limit 60d of the table value by the estimated value of the identification table 3 are divided by the values of the table values 60c to 60d, and the matching rate is calculated. To calculate. At this time, in the radio wave backward detection apparatus according to the second embodiment, the estimated value of the identification table 3 can be changed by the numerical range changing means 80, for example, the upper limit 60d of the table value to 60g before calculating the matching rate. By doing so, it is possible to cope with the case where the measurement accuracy of the sensor that receives the radio wave is extremely poor. The other operations except for the calculation of the matching rate are the same as those of the apparatus of the first embodiment, and will be omitted.

FIG. 8 is a diagram for explaining the calculation of the matching rate of the radio wave reverse detection apparatus according to the third embodiment of the present invention. In the device of the second embodiment, the matching rate calculation device 12 divides the overlapping range of the numerical value range of the estimated value of the identification table 3 and the numerical value range of the measured value of the measured radio wave specification memory 2 by the numerical value range of the estimated value. The matching rate was calculated by In the radio wave reverse detection apparatus according to the third embodiment, the matching rate calculation apparatus calculates the matching rate as follows. First, the lower limit 50a to the upper limit 5 depending on the measured value
A central value difference 50f between the central value 50c in the numerical range of 0b and the central value 50d in the numerical range of the lower limit 50d to the upper limit 50e based on the estimated value (table value) is calculated. Next, the numerical range of the above table values 50d to 50e
The matching rate is calculated by dividing the difference by 50f.

FIG. 9 is a block diagram of a radio wave reverse detection apparatus according to Embodiment 4 of the present invention. In FIG. 9, 90 is a learning means. In the device of the fourth embodiment, the match result determining device 7
The identification table 3 can be rewritten to the data having a high matching rate based on the output result of 1. The part excluding the learning means 90 is the same as the configuration described in the first embodiment. The learning means 90 stores the attribute data selected by the match result determination device 8 and corresponding to the high match rate,
For example, when the matching rate based on the estimated value is smaller than that up to now, the numerical range of the estimated value in the identification table 3 is rewritten to the numerical range having the large matching rate. Alternatively, the numerical value range of the statistical value in the identification table 3 is rewritten.

FIG. 10 is a block diagram of a radio wave reverse detection device according to a fifth embodiment of the present invention, and FIG. 11 is a diagram for explaining the operation of the device of FIG. The device of the fifth embodiment is the same as the device of the above-described fourth embodiment in terms of components, and in the fourth embodiment, the learning result based on the result of the match rate result determination device 7 is reflected in the identification table 3. On the other hand, in the fifth embodiment, the matching rate calculation results are reflected in the data recorded in the matching rate calculation result memory 6 in accordance with the matching rates output from the calculation apparatuses 10 to 12.
For example, in FIG. 9, the required matching rate is set to 75%, the vertical axis indicates the required matching rate, and the horizontal axis indicates the passage of time (S: seconds). t1 is a section in which the matching rate is obtained by the sensor A, and t2 is a section in which the matching rate is obtained by the sensor B. The learning means 90 of this FIG.
Get the match rate from 0-12. If the matching rate of 75% or more is not continuously obtained, this learning means sets the matching rate calculation result memory 6 to the highest matching rate of 55% obtained so far.
To set. Alternatively, when the capacity of the match rate calculation result memory 6 becomes half (time t3), the match rate of 3 up to the current match rate is reached.
(70%) (Fig. 9).

[0023]

According to the first aspect of the present invention, the measured radio wave memory is based on all the attribute data in the identification table including the attribute data obtained by measurement, the attribute data obtained by statistics and the attribute data obtained by estimation. (Measurement radio wave specification memory)
Since the configuration is provided with the matching rate calculation means for calculating the matching rate with the attribute data of the radio wave received from, there is an effect that the received radio wave can be identified more accurately. According to the second aspect of the present invention, a numerical value range of the identification table is defined as an overlapping range of the numerical value range of the attribute data of the identification table and the numerical value range of the attribute data of the same kind as the attribute data from the measurement radio wave memory. Since it is configured to obtain the matching rate of the received radio wave by dividing by, there is an effect that the received radio wave can be more accurately identified.
According to the third aspect of the present invention, the radar (sensor) that receives the radio wave on the receiving side is provided with the numerical range changing means for changing the numerical range of the attribute data of the identification table when the accuracy of the received radio wave is poor. Even if the accuracy of is poor, there is an effect that the received radio waves can be accurately identified. This 4th
According to the invention, the numerical range of the attribute data from the identification table is divided by the difference between the central value of the numerical range and the central value of the numerical range of the attribute data of the same kind as the attribute data from the measured radio wave memory. Since the configuration is such that the matching rate of the received radio waves is obtained, there is an effect that the received radio waves can be identified more accurately. According to the fifth aspect of the invention, there is provided learning means for learning based on the matching rate of the radio wave from the matching rate result determining means and rewriting the attribute data obtained from statistics and the attribute data obtained from estimation in the identification table. Because it was configured,
The identification table can be rewritten with attribute data having a higher matching rate, and the effect is that the received radio waves can be identified more accurately than those of the first to fourth inventions. According to the sixth aspect of the invention, learning is performed based on the matching rate of the radio wave from the matching rate calculating means, and the learning result is used to store the attribute data and the attribute data prepared in advance by the matching rate result determining means. Since the learning means for determining the range of the value of the matching rate is provided, there is an effect that the received radio wave can be accurately identified.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a radio wave reverse detection device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a data structure in an identification table in the device of FIG.

FIG. 3 is a diagram illustrating calculation of a matching rate by the apparatus of FIG.

FIG. 4 is a diagram for explaining calculation of a matching rate by the apparatus of FIG.

5A and 5B are diagrams illustrating calculation of a matching rate by the apparatus of FIG.

FIG. 6 is a configuration diagram of a radio wave reverse detection device according to a second embodiment of the present invention.

FIG. 7 is a diagram illustrating calculation of a matching rate by the device in FIG.

FIG. 8 is a diagram illustrating calculation of a matching rate of a radio wave backward detection device according to a third embodiment of the present invention.

FIG. 9 is a configuration diagram of a radio wave reverse detection device according to a fourth embodiment of the present invention.

FIG. 10 is a configuration diagram of a radio wave reverse detection device according to a fifth embodiment of the present invention.

11 is a diagram for explaining the function of the apparatus of FIG.

FIG. 12 is a configuration diagram of a conventional radio wave reverse detection device.

[Explanation of symbols]

 1 Input end 2 Measurement radio wave specification memory 3 Identification table 4 Data extraction device 5 Match rate calculation device 6 Match rate calculation result memory 7 Match result determination device 8 Output end 9 Switching device 10, 11, 12 Match rate calculation device

Claims (6)

[Claims] 1. A measurement radio wave memory for storing attribute data such as frequency and pulse width of a received radio wave, and attribute data having the largest value among the matching rate values of the attribute data and the attribute data prepared in advance. In the radio wave reverse detection device for identifying the received radio wave, the attribute data obtained from the measurement, the attribute data obtained from the statistics, and the estimation A matching rate calculation means for calculating the matching rate with the attribute data of the radio wave received from the measurement radio wave memory based on all the attribute data of the identification table, which is configured by the attribute data obtained from the above. A radio wave reverse detection device characterized by being provided. 2. The matching rate calculation means, when determining the matching rate with the received radio wave from the measurement radio wave memory based on the attribute data obtained from the estimation from the identification table,
It is characterized in that a range in which the numerical value range of the attribute data of the identification table and the numerical value range of the attribute data of the same kind as the attribute data from the measurement radio wave memory overlap is divided by the numerical range of the identification table. The first claim
Radio wave reverse detection device described in the paragraph. 3. When the accuracy of the sensor that receives the received radio wave from the measurement radio wave memory is poor in the identification table,
The numerical range changing means for changing the numerical range of the attribute data of the identification table is added.
Radio wave reverse detection device described in the paragraph. 4. The matching rate calculation means, when obtaining the matching rate with the received radio wave from the measurement radio wave memory based on the attribute data obtained from the estimation from the identification table,
The numerical range of the attribute data from the identification table is divided by the difference between the central value of the numerical range and the central value of the numerical range of the attribute data of the same kind as the attribute data from the measurement radio memory. Claim 1 characterized by
Radio wave reverse detection device described in the paragraph. 5. The matching rate result determining means learns based on the matching rate of the radio wave from the matching rate result determining means,
The radio wave reverse detection device according to claim 1, further comprising a learning means for rewriting the attribute data obtained from statistics or the attribute data obtained from estimation of the identification table. 6. The matching rate result determining means learns based on the matching rate of the radio waves from the matching rate calculating means, and the attribute data and the attribute data selected by the matching rate result determining means in advance based on the learning result. 2. The radio wave reverse detection device according to claim 1, further comprising a learning means for determining a range of the value of the matching rate of the prepared attribute data.