JPH0933630A - Radio-communication-system elucidation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio-communication-system elucidation method in which an orientation processing operation can be performed on the basis of a combination of an electrical factor, the search time and an arrival azimuth. SOLUTION: Azimuth measuring devices 1a, 1b, 1c measure the azimuth of search communication maves. Then, a group orientation processing part 2 performs an orientation processing operation on the basis of output signals of the azmuth measuring devices 1a, 1b, 1c. In addition, a true-transmission-point specification processing part 3 specifies a transmission point on the basis of the orientation processing operation. Lastly, a correlation-system elucidation processing part 4 elucidates a communication system on the basis of a correlation between respective true transmission points. By this configuration, it is possible to realize a radio-communication-system elucidation method in which whether communication waves are transmitted from the same transmission source or not can be judged and decided and in which the true position of a transmitting station can be judged and decided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a wireless communication wave, locating a communication place where communication is performed, and clarifying a communication organization. In particular, the present invention relates to a method of identifying an unidentified wireless transmission source and a transmission station performing wireless communication with the transmission source.

[0002]

2. Description of the Related Art Various methods are known for detecting radio communication waves and clarifying the communication organization. For example, an example of such a conventional wireless communication system elucidation method is shown in FIG. FIG. 7 is a configuration block diagram of a wireless communication system elucidating apparatus that executes a conventional wireless communication system elucidating method. As shown in FIG. 7, first, the azimuth measuring device 13 measures the direction in which the communication wave arrives and the electrical specifications of the communication wave. This azimuth measuring device 13 is also called a search receiver as shown in FIG. The electrical specifications detected by the azimuth measuring device 13 are supplied to the azimuth processing device 14. For example, as shown in FIG. 7, the azimuth processing device 14 includes three types 14a, 14b, and 14c. These azimuth processing devices 14a, 14b, 14c have a predetermined range of arrival azimuth angle or a predetermined range for a predetermined measurement cycle (for example, 10 ms × 10) with respect to what is regarded as the same source in the azimuth measuring device 13. The average value above the threshold value is calculated. Further, the orientation processing device 15 calculates the orientation point from the value corresponding to the center of gravity of the intersection area of the arrival directions obtained by each of the orientation processing devices 14a, 14b, and 14c, or from the intersection point. Finally, the display processing device 16 displays the orientation result oriented by the orientation processing device 15.

In this way, the azimuth measuring device 13 detects the target wave, and the azimuth processing devices 14a, 14b, 1
In 4c, the orientation processing device 15 collects orientation measurements within a prescribed range for each same transmitting station for each predetermined period, and obtains orientation points. Then, the result is the display processing device 1.
6 is displayed.

A radio wave search system for searching for a radio wave transmission point is described in, for example, Japanese Patent Laid-Open No. 62-207981. Further, a propagation emission source display device capable of specifying a position (of a transmitting station) with a high statistical probability by statistically processing the intensity of propagation and the like is disclosed in Japanese Patent Application Laid-Open No. 3-282.
No. 279.

[0005]

As described above, FIG.
The wireless communication system elucidating apparatus and method as shown in (1) have the following problems.

(1) For example, in press talk communication in which the same electrical specifications are used in a time-division manner, the same transmission source is used when wireless communication in which continuous transmission times of radio waves differ depending on the operation. It is impossible to judge whether or not

(2) Further, when the transmitting station is moving, reflected waves of mountains or the like are generated at any time depending on the positional relationship between the transmitting station / receiving station (each direction measuring device) and the frequency.
Also, the variance in each cycle can be reduced by the averaging process, but since the surrounding measurement itself has an error (for example, an error of about 1 degree), if a large number of orientation processes are performed, the result will be multiple. The control point of appears,
There is a problem that the true position of the transmitting station cannot be determined.

(3) Further, even if a large number of transmission points can be determined, the above-mentioned press-talk communication system that uses the same electrical specifications in a time-division manner or different electrical specifications between transmission and reception In the different wave communication system used, it is not possible to judge which transmitting station is communicating.

By using the time division method, in the present method in which no correlation is obtained in time, it is determined whether the variation of the control points is due to the distribution of a large number of transmitting stations or the variation of the law error. I can't.

The present invention has been made in view of the above problems, and an object thereof is to enable orientation processing based on a combination of electrical specifications, detection time, and direction of arrival, and to provide each orientation. It is an object of the present invention to provide a wireless communication system elucidation method capable of identifying a true transmission area from the result of detection time and distribution of orientation coordinates and further elucidating the communication system between each transmission station.

[0011]

In order to solve the above-mentioned problems, the first aspect of the present invention is based on the electrical data collected by each azimuth / elevation angle measuring means, the detection time and the arrival angle. , True transmission for removing the influence of a reflection object such as a mountain based on the correlation among the group orientation processing step for obtaining each orientation point, the electrical specifications of each orientation point, the detection time, and the position A point identification processing step, and a correlation system elucidation processing step of obtaining a communication system communicating with each other based on the correlation between the call response time of each true transmission point and the deployment distance. It is a method of elucidating the wireless communication system.

In order to solve the above problems, the second aspect of the present invention employs a filter bank method in the method for clarifying the wireless communication system of the first aspect of the present invention to select a frequency of a radio signal to be received. It is a method for elucidating a wireless communication system that includes a bank process and is capable of high-speed frequency hopping system orientation. .

The third aspect of the present invention is the method for clarifying a wireless communication system according to the first aspect, wherein in the correlation system elucidation processing step, only a correlation equal to or higher than the threshold value is determined using a correlation threshold value. Is a method for elucidating a wireless communication system.

The fourth aspect of the present invention is the wireless communication system elucidating method according to the first aspect, wherein the electrical specifications include at least one of frequency, modulation method, and reception intensity. This is a system elucidation method.

The fifth aspect of the present invention is the method for elucidating a wireless communication system according to the first method for elucidating a wireless communication system, characterized in that an elevation angle is collected instead of the azimuth angle.

According to the wireless communication system elucidating method of the first aspect of the present invention, based on the combination of the electrical specifications / detection time / arrival direction individually collected by each azimuth measuring means,
Separate multiple targets by swarm orientation. The true transmission point is specified based on the distribution of the detection times / locating coordinates of the plurality of control points determined by this separation, and the cross-correlation of the call response between the respective transmission areas is obtained by the correlation system elucidation processing.

In the second aspect of the present invention, since the filter bank method is adopted, it is possible to locate the wireless communication system adopting the frequency hopping method.

In the third aspect of the present invention, by setting the threshold value of the correlation, it is possible to clarify not only the radio system having the call response but also the single transmitting station which is simply broadcasting.

According to the fourth aspect of the present invention, by specifying various parameters as electrical specifications, the identification of the transmitting station can be made more accurate.

According to the fifth aspect of the present invention, by using the elevation angle instead of the azimuth angle, it is possible to clarify the radio communication system with higher accuracy.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 is a block diagram showing the configuration of a wireless communication system elucidating apparatus which realizes a wireless communication system elucidating method according to a preferred embodiment of the present invention. As shown in FIG. 1, the azimuth measuring devices 1a, 1b, 1c measure the azimuth of the communication wave to be searched. Then, the group orientation processing unit 2 uses the azimuth measuring device 1a,
Orientation processing is performed based on the output signals of 1b and 1c. Furthermore, the true transmission point identification processing unit 3 identifies the transmission point based on the orientation processing result. Finally, the correlation system elucidation processing unit 4
Understands the wireless communication system based on the correlation of each true transmission point.

Further, FIG. 2 shows an explanatory view for explaining the operation of the true transmission point identification processing section 3 in FIG.
As shown in FIG. 2, the true transmission point identification processing unit 3
Is a specification monitoring process 5 for monitoring the specifications of the communication wave, an area monitoring process 6 for monitoring the control point of the communication wave, a time monitoring process 7 for monitoring the reception time of the communication wave, and the dispersion of these processes. The process is composed of a distributed monitoring process 8 for monitoring the.

FIG. 3 is an explanatory view for explaining the operation of the correlation system elucidation processing section 4. As shown in FIG. 3, the correlation system clarification processing in the correlation system clarification processing unit 4 includes a specification monitoring process 9 for monitoring the specifications of the communication wave and a spot monitoring process 10 for monitoring the location of the communication wave. And a time monitoring process 11 for monitoring the reception time of the communication wave, and a cross correlation monitoring process 12 for monitoring the cross correlation based on the results of these processes.

Next, the operation will be described.

First, as shown in FIG. 1, the target wave is individually measured by the azimuth measuring devices 1a, 1b, 1c and supplied to the group orientation processing section 2. This group orientation processing unit 2
In, the predetermined grouping is performed according to the measurement specifications (for example, frequency, area, measurement time, etc.) of the target wave. Orientation processing is performed on target waves that are recognized to be the same as a result of this grouping.

FIG. 4 shows an explanatory view for explaining the operation flow of the group orientation processing section 2. Direction measuring devices 1a, 1
In b and 1c, for example, the measurement data input from the azimuth measuring device is used as a filter bank with the frequency axis as one of the measurement specifications. Then, the measured waves are classified and accumulated for each frequency, and classification 19 according to the reception time (falling time to the filter) of the accumulated data, classification 20 according to the measurement direction, and the like are performed. A matrix is formed based on the classification 19 according to the reception time and the classification 20 according to the measurement direction, and a correlation process 21 between the classifications is performed from the matrix to perform predetermined grouping and derive the orientation point. The derivation of this photo control point is represented as photo control point extraction 22 in FIG.

On the other hand, in the true transmission point identification processing unit 3, the plurality of orientation points obtained as orientation processing results are
Since the azimuth measurement itself already contains an error, there are variations in the orientation points, and for sources that transmit radio waves at a rate of a few seconds for a few minutes, the There are variations. Therefore, in the specification monitoring process 5, the appearance of target waves regarded as the same specifications (frequency, modulation method, etc.) is constantly monitored, and the area monitoring process 6 is performed.
In, the orientation coordinate distribution of the target wave is monitored. Further, in the time monitoring process 7, the orientation time distribution is monitored,
Based on the positional relationship in which the azimuth measuring devices 1a, 1b, 1c are arranged, distributed monitoring of the distribution of the processing results of the above respective processings (5, 6, 7) is performed. A location that satisfies the threshold set as a result of this distributed monitoring is determined as the true transmission point.

FIG. 5 is an explanatory diagram showing the operation flow of the true transmission point identification processing section 3. With respect to the group orientation processing result 23 which is the processing result of the group orientation processing unit 2, in the specification monitoring (for example, frequency) 24, a predetermined threshold value set from the frequency of use frequency is used for a plurality of oriented orientation points. Select a specific frequency. In addition, area monitoring 25
In (1), variations and errors of emerging photo-control points are rounded by grouping, and in the time monitoring 26, variations in measurement error of measurement times and determination of the same communication are grouped. Then, in the distributed monitoring process 27, the transmission source is specified based on the results of these monitoring,
The true transmission point is extracted. This true transmission point extraction is represented as 28 in FIG.

The correlation system elucidation processing unit 4 monitors the electrical characteristic data 9 and the area monitoring process 10 for a plurality of transmission points obtained as the result of the true transmission point identification processing.
In, the appearance of the same transmission point is monitored. In the time monitoring process 11, the appearance time distribution of each transmission point is monitored, the cross-correlation is obtained based on the results of 9, 10, and 11, and the correlation between the transmission value points satisfying the set threshold value is obtained. The communication system is elucidated by adding the system.

FIG. 6 is an explanatory diagram of an operation flow in the correlation system clarification processing unit 4. First, the true transmission point identification result 2 which is the output signal of the true transmission point identification processing unit 3
On the other hand, in the specification monitoring 30 (for example, frequency), the transition status of the used frequency is monitored and a specific frequency is selected according to the set threshold value. Further, in the area monitor 31, the variations and errors of the appearance control points are rounded by grouping, and in the time monitor 32, the grouping is performed based on the variations of the measurement error at the specific time and the judgment of the same communication. Finally, the transmission source is specified in the distributed monitoring process (cross-correlation monitoring process) 33,
The true transmission point is extracted. It should be noted that the extraction of this true transmission point is represented as the elucidation 34 of the correlation system in FIG.

Second Embodiment In the first embodiment, the different-wave communication system having different transmission / reception specifications has been described. However, by adopting the filter bank method, a high-speed FH (frequency hopping) method is used for orientation. This method can be applied to By adopting such a configuration, it is possible to elucidate the wireless communication system for the FH system as in the first embodiment.

That is, since the FH system can be located, the tracking of the correlation system makes it possible to clarify the wireless communication system by this system.

Embodiment 3 In Embodiment 1 described above, the wireless system with call response has been described. However, the method according to this embodiment simply broadcasts by setting a correlation threshold value. It is also possible to elucidate a single transmitting station that is only doing.

That is, it is possible to judge that a transmitting station having a weak correlation is a broadcasting type wireless communication station in which an unspecified receiving station exists.

Fourth Embodiment Furthermore, in the first embodiment, one of the electrical specifications in the group orientation has been described as a frequency, but other electrical specifications of the communication wave (for example, the modulation method and the reception method). (Strength etc.), the communication system can be elucidated by the same method.

That is, in group orientation, more accurate orientation can be performed by using not only one parameter but also a plurality of parameters. Of course, one parameter is also possible and it can be other than frequency.

Fifth Embodiment In the first embodiment, the case of using the azimuth has been described, but the same method can be realized even if the azimuth is replaced with the elevation. In this case, the same effect can be obtained, and the wireless communication system can be clarified.

That is, by incorporating the elevation angle,
It is also applicable to orientation in the air (for example, aircraft) and ionospheric reflection waves.

[0040]

As described above, according to the present invention, since the azimuth measuring device and the azimuth processing device are integrated into one unit, there are few restrictions on the performance of the receiver, and it becomes possible to perform successive orientation. Further, a wireless communication system elucidating method capable of identifying the transmitting station even when the transmission content is unknown and elucidating the wireless communication system can be obtained.

In other words, in contrast to the conventional locating system, according to the present invention, the communication in which communication is performed by further determining the presence / absence of communication of each locating point by correlation processing. It is possible to elucidate the system of the place.

Further, according to the second aspect of the present invention, since the filter bank method is adopted, there is an effect that it can be applied to the orientation of the wireless communication system related to the frequency hopping method.

Further, according to the third aspect of the present invention, it is possible to obtain a radio communication system elucidating method capable of elucidating a single transmitting station which is only transmitting.

Further, according to the fourth aspect of the present invention, since the modulation method and the reception intensity are used as the electrical specifications, it is possible to more accurately clarify the wireless communication system.

According to the fifth aspect of the present invention, since the elevation angle is used instead of the azimuth angle, a wireless communication system elucidating method capable of elucidating the transmitting station more accurately can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of an apparatus that implements a wireless communication system elucidating method according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating an operation of a true transmission point identification processing unit according to the first embodiment.

FIG. 3 is an explanatory diagram illustrating an operation of a correlation system clarification processing unit according to the first embodiment.

FIG. 4 is an explanatory diagram showing a processing course of a group orientation processing unit according to the first embodiment.

FIG. 5 is an explanatory diagram showing an actual processing flow of a true transmission point identification processing unit according to the first embodiment.

FIG. 6 is an explanatory diagram showing an actual processing flow of a correlation system clarification processing unit according to the first embodiment.

FIG. 7 is an explanatory diagram showing a conventional orientation processing method.

[Explanation of symbols]

1a, 1b, 1c Direction measurement processing section, 2 group orientation processing section, 3 true transmission point identification processing section, 4 correlation system elucidation processing section, 5 specification monitoring processing, 6 area monitoring processing, 7 time monitoring processing, 8 distributed monitoring Processing, 9 Specification monitoring processing, 10
Area monitoring process, 11 time monitoring process, 12 cross-correlation monitoring process, 13 azimuth measuring device, 14 azimuth processing device, 15
Orientation processing device, 16 display processing device, 17 input from azimuth measuring device, 18 filter bank, 19 reception time classification, 20 measurement azimuth classification, 21 inter-class correlation processing, 2
2 Control point extraction processing, 23 Group control processing result, 24 Specification monitoring, 25 Area monitoring, 26 Time monitoring, 27 Distributed monitoring processing, 28 True transmission point extraction processing, 29 True transmission point identification result, 30 Specification monitoring, 31 Area monitoring, 32
Time monitoring, 33 cross-correlation monitoring processing, 34 correlation system elucidation processing.

Claims (5)

[Claims] 1. Based on electrical specifications collected by each azimuth / elevation angle measuring means, detection time, and arrival angle,
Based on the correlation among the group orientation processing step for obtaining each orientation point, the electrical specifications of each orientation point, the detection time, and the position, a true transmission point that removes the influence of a reflector such as a mountain. A specific processing step, and a correlation system elucidation processing step of obtaining a communication system communicating with each other based on the correlation between the call response time at each true transmission point and the deployment distance. Wireless communication system elucidation method. 2. The method for elucidating a wireless communication system according to claim 1, further comprising a filter bank step of adopting a filter bank method and selecting a frequency of a wireless signal to be received, thereby enabling high-speed frequency hopping method orientation. Wireless communication system elucidation method. 3. The method for elucidating a wireless communication system according to claim 1, wherein the correlation system elucidation processing step elucidates only a correlation equal to or more than the threshold value by using a threshold value of correlation. Wireless communication system elucidation method. 4. The wireless communication system elucidating method according to claim 1, wherein the electrical specifications include at least one of a frequency, a modulation method, and a reception intensity. 5. The method for elucidating a wireless communication system according to claim 1, wherein an elevation angle is collected instead of the azimuth angle.