JP5220142B2 - Radio wave detector - Google Patents

Description

  The present invention relates to a radio wave detection device that receives a radio wave radiated from a radio wave transmission source such as a radar and analyzes the radio wave to identify the individual radio wave transmission source.

For example, in the radio wave detection device disclosed in Patent Document 1 below, radio waves radiated from a radio wave source are received using an omnidirectional antenna that receives radio waves coming from all directions in a horizontal plane. .
When receiving a radio wave radiated from a radio wave transmission source, the radio wave detection device detects an antenna pattern of the radio wave transmission source (hereinafter referred to as “detection antenna pattern”) from the radio wave.
However, the “antenna pattern” represents how the antenna of the radio wave transmission source radiates energy into the space, and represents the amplitude characteristic / phase characteristic with respect to the azimuth angle of the radio wave transmission source.

  The radio wave detection device is preliminarily configured with an antenna pattern (hereinafter referred to as “registered antenna pattern”) of a plurality of radio wave transmission sources (for example, radio wave transmission source A, radio wave transmission source B, radio wave transmission source C,. A database in which is registered). In this database, unique individual information for identifying the radio wave source is registered together with the antenna pattern of the radio wave source.

When the radio wave detection device detects a detected antenna pattern from the received radio wave, the detected antenna pattern is compared with a plurality of registered antenna patterns registered in the database, and a registered antenna pattern that is most similar to the detected antenna pattern Is identified.
When the radio wave detection device identifies a registered antenna pattern that is most similar to the detected antenna pattern, the radio wave detection device outputs individual information of the radio wave source having the registered antenna pattern.
Thereby, it is possible to identify a radio wave source that emits radio waves.

JP 2003-270326 A (paragraph numbers [0015] to [0027], FIG. 1)

  The conventional radio wave detection device is configured as described above. Using an omnidirectional antenna, the radio wave emitted from the radio wave source is received and the antenna pattern of the radio wave source is detected from the radio wave. Yes. For this reason, it is not necessary to direct the directional antenna in the radio wave arrival direction of the radio wave source as in the case of receiving the radio wave radiated from the radio wave source using the directional antenna. However, using a directional antenna that is accurately oriented in the direction of arrival of the radio wave source, receive the radio wave emitted from the radio wave source and detect the antenna pattern of the radio wave source from that radio wave. However, since the detection accuracy of the antenna pattern is low, there is a problem that the individual identification accuracy of the radio wave transmission source is low.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a radio wave detection device capable of accurately identifying an individual radio wave transmission source.

  The radio wave detection device according to the present invention includes a first antenna pattern detection means for detecting an antenna pattern of a radio wave transmission source from radio waves received using an omnidirectional antenna, and radio waves received using a directional antenna. A second antenna pattern detecting means for detecting an antenna pattern in which the antenna pattern of the directional antenna and the antenna pattern of the radio wave source are combined; the amplitude value of the antenna pattern detected by the first antenna pattern detecting means; The radio wave arrival direction detection means for detecting the arrival direction of the radio wave by comparing the amplitude values of the antenna patterns detected by the two antenna pattern detection means, and the directivity in the arrival direction of the radio wave detected by the radio wave arrival direction detection means Directional antenna control means for directing the antenna, and the radio wave source specifying means After the directional antenna is directed in the direction of arrival of radio waves by the na control means, the antenna pattern detected by the second antenna pattern detection means is acquired, and among the plurality of antenna patterns registered by the antenna pattern registration means Thus, an antenna pattern that is most similar to the acquired antenna pattern is searched, and a radio wave source having the antenna pattern is specified.

  According to the present invention, the first antenna pattern detecting means for detecting the antenna pattern of the radio wave source from the radio wave received using the omnidirectional antenna, and the directional antenna from the radio wave received using the directional antenna. Second antenna pattern detecting means for detecting an antenna pattern in which the antenna pattern of the antenna and the antenna pattern of the radio wave source are combined, the amplitude value of the antenna pattern detected by the first antenna pattern detecting means, and the second antenna Comparing the amplitude values of the antenna patterns detected by the pattern detection means, the radio wave arrival direction detection means for detecting the arrival direction of the radio wave, and the directional antenna pointing to the arrival direction of the radio wave detected by the radio wave arrival direction detection means A directional antenna control means, and the radio wave source specifying means is a directional antenna control means. After the directional antenna is directed to the direction of arrival of the radio wave, the antenna pattern detected by the second antenna pattern detection unit is acquired, and among the plurality of antenna patterns registered by the antenna pattern registration unit, The antenna pattern that is most similar to the acquired antenna pattern is searched and the radio wave source having the antenna pattern is specified, so that the individual identification of the radio wave source can be performed with high accuracy. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the electromagnetic wave detection apparatus by Embodiment 1 of this invention. It is a block diagram which shows the identification process part 8 of the radio wave detector by Embodiment 1 of this invention. It is a flowchart which shows the processing content of the radio wave detection apparatus by Embodiment 1 of this invention. It is a flowchart which shows the processing content of the electromagnetic wave detection apparatus by Embodiment 2 of this invention. It is a block diagram which shows the electromagnetic wave detection apparatus by Embodiment 3 of this invention. It is a block diagram which shows the identification process part 10 of the radio wave detector by Embodiment 3 of this invention. It is a flowchart which shows the processing content of the electromagnetic wave detection apparatus by Embodiment 3 of this invention.

Embodiment 1 FIG.
1 is a block diagram showing a radio wave detection apparatus according to Embodiment 1 of the present invention.
In FIG. 1, a radio wave transmission source 1 corresponds to, for example, a radar mounted on a ship or the like, and is an individual identification target for individual identification by the radio wave detection device of FIG.
The omnidirectional antenna 2 is an antenna that receives radio waves coming from all directions in a horizontal plane.
The directional antenna 3 is an antenna that receives radio waves coming from a specific direction while rotating in a horizontal plane.

The radio wave receiving unit 4 uses the omnidirectional antenna 2 to perform radio wave reception processing for receiving the radio wave radiated from the radio wave source 1, and receives the received signal, which is an electric signal indicating the radio wave, from the specification detection unit 6 And the process output to the identification process part 8 is implemented. The radio wave receiver 4 constitutes a first radio wave receiver.
The radio wave receiving unit 5 uses the directional antenna 3 to perform radio wave reception processing for receiving the radio wave radiated from the radio wave transmission source 1, and receives the received signal, which is an electric signal indicating the radio wave, from the specification detection unit 6 and Processing to be output to the identification processing unit 8 is performed. The radio wave receiving unit 5 constitutes a second radio wave receiving means.

The specification detection unit 6 includes an antenna pattern detection unit 6a and an antenna pattern detection unit 6b.
The antenna pattern detection unit 6a analyzes the reception signal output from the radio wave reception unit 4 and determines the signal parameters (for example, frequency, pulse width, pulse repetition interval (PRI: Pulse) of the radio wave received by the omnidirectional antenna 2. (Repetition Interval), direction, etc.) is detected, and the antenna pattern Ω (θ, φ) of the radio wave source 1 is detected from the signal specifications. Where θ is the azimuth angle of itself (radio wave detection device), and φ is the azimuth angle of the other party (radio wave transmission source 1). The antenna pattern detector 6a constitutes a first antenna pattern detector.

  The antenna pattern detection unit 6b analyzes the reception signal output from the radio wave reception unit 5 and determines the signal parameters (for example, frequency, pulse width, pulse repetition interval, direction, etc.) of the radio wave received by the directional antenna 3. A process of detecting and detecting an antenna pattern Σ (θ, φ) in which the antenna pattern of itself (the directional antenna 3 of the radio wave detector) and the antenna pattern of the other party (radio wave source 1) are synthesized from the signal specifications To implement. The antenna pattern detection unit 6b constitutes a second antenna pattern detection means.

  In the example of FIG. 1, the specification detection unit 6 includes an antenna pattern detection unit 6a and an antenna pattern detection unit 6b, and the antenna pattern detection unit 6a detects the antenna pattern Ω (θ, φ), and the antenna. Although the pattern detection unit 6b is independent from the process of detecting the antenna pattern Σ (θ, φ), the configuration of the specification detection unit 6 is not necessarily limited to the antenna pattern detection unit 6a and the antenna pattern detection unit. It is not necessary to be divided into 6b, and the specification detection unit 6 including one antenna pattern detection unit may detect the antenna pattern Ω (θ, φ) and the antenna pattern Σ (θ, φ).

The database unit 7 is, for example, a recording device such as a hard disk, and previously has antenna patterns (hereinafter referred to as “registered antenna patterns”) of a plurality of radio wave transmission sources (for example, individual A, individual B, individual C...) That are individual identification targets. Is registered). In the database unit 7, unique individual information for identifying the radio wave source is registered together with the antenna patterns of the plurality of radio wave sources. The database unit 7 constitutes an antenna pattern registration unit.
The identification processing unit 8 includes a local antenna pattern acquisition unit 11, a radio wave arrival direction detection unit 12, a directional antenna control unit 13, and a radio wave source identification unit 14. Perform individual identification processing.

Here, FIG. 2 is a block diagram showing the identification processing unit 8 of the radio wave detector according to Embodiment 1 of the present invention.
In FIG. 2, the own antenna pattern acquisition unit 11 determines the reception levels of the antenna pattern Ω (θ, φ) detected by the antenna pattern detection unit 6a and the antenna pattern Σ (θ, φ) detected by the antenna pattern detection unit 6b. A process for obtaining the antenna pattern G (θ, φ) of itself (the directional antenna 3 of the radio wave detector) from the amplitude comparison result Σ (θ, φ) / Ω (θ, φ) is performed. .

The radio wave arrival direction detection unit 12 performs a process of detecting the radio wave arrival direction θm from the antenna pattern G (θ, φ) of itself (directional antenna 3 of the radio wave detection device) detected by the own antenna pattern acquisition unit 11. To do.
The own antenna pattern acquisition unit 11 and the radio wave arrival direction detection unit 12 constitute radio wave arrival direction detection means.

The directional antenna control unit 13 performs a process of directing the directional antenna 3 in the arrival direction θm of the radio wave detected by the radio wave arrival direction detection unit 12 by controlling, for example, an actuator (not shown) of the directional antenna 3. carry out. The directional antenna control unit 13 constitutes directional antenna control means.
The radio wave source specifying unit 14 directs the antenna pattern (hereinafter referred to as “detected antenna pattern”) detected by the antenna pattern detection unit 6b after the directional antenna 3 is directed by the directional antenna control unit 13 in the arrival direction θm of radio waves. And search for a registered antenna pattern most similar to the detected antenna pattern from among the plurality of registered antenna patterns registered by the database unit 7, and a radio wave source having the registered antenna pattern Implement the process to identify. The radio wave source specifying unit 14 constitutes a radio wave source specifying unit.

Each of the radio wave receiving units 4 and 5, the specification detecting unit 6 and the identification processing unit 8 which are components of the radio wave detection device of FIG. 1 is dedicated hardware (for example, a semiconductor integrated circuit on which a CPU is mounted, or However, when the radio wave detection device is constituted by a computer, the processing contents of the radio wave reception units 4 and 5, the specification detection unit 6 and the identification processing unit 8 are as follows. The described program may be stored in a memory of a computer, and the CPU of the computer may execute the program stored in the memory.
FIG. 3 is a flowchart showing the processing contents of the radio wave detection apparatus according to Embodiment 1 of the present invention.

Next, the operation will be described.
The radio wave transmission source 1 that is an individual identification target starts to radiate radio waves while rotating the antenna.
The radio wave receiver 4 performs radio wave reception processing for receiving radio waves radiated from the radio wave source 1 using the omnidirectional antenna 2 that receives radio waves coming from all directions in a horizontal plane. The received signal, which is an electrical signal indicating the above, is output to the specification detection unit 6 and the identification processing unit 8 (step ST1).
Since the processing content itself in which the radio wave receiving unit 4 receives radio waves and outputs the received signals is a known technique, detailed description thereof is omitted.

In addition, the radio wave receiving unit 5 performs radio wave reception processing for receiving radio waves radiated from the radio wave source 1 using the directional antenna 3 that receives radio waves coming from a specific direction while rotating in a horizontal plane. The reception signal, which is an electric signal indicating the radio wave, is output to the specification detection unit 6 and the identification processing unit 8 (step ST2).
Since the processing content itself in which the radio wave receiving unit 5 receives radio waves and outputs the received signals is a known technique, detailed description thereof is omitted.

When receiving the received signal from the radio wave receiving unit 4, the antenna pattern detecting unit 6 a of the specification detecting unit 6 analyzes the received signal and analyzes the signal parameters (for example, frequency) of the radio wave received by the omnidirectional antenna 2. , Pulse width, pulse repetition interval, direction, etc.) and the antenna pattern Ω (θ, φ) of the other party (radio wave transmission source 1) is detected from the signal specifications (step ST3).
Where θ is the azimuth angle of itself (radio wave detection device), and φ is the azimuth angle of the other party (radio wave transmission source 1).
Since the omnidirectional antenna 2 does not rotate like the directional antenna 3, the antenna pattern Ω (θ, φ) detected by the antenna pattern detection unit 6a is the antenna pattern itself of the counterpart (the radio wave source 1). It becomes.
The antenna pattern represents the amplitude characteristic and the phase characteristic with respect to the azimuth angle. However, since the process of detecting the antenna pattern by the antenna pattern detection unit 6a is a known technique, detailed description thereof is omitted.

When the antenna pattern detection unit 6b of the specification detection unit 6 receives the reception signal from the radio wave reception unit 5, the antenna pattern detection unit 6b analyzes the reception signal and analyzes the signal specification of the radio wave received by the directional antenna 3 (for example, frequency, An antenna in which the antenna pattern of itself (the directional antenna 3 of the radio wave detector) and the antenna pattern of the other party (the radio wave source 1) are synthesized from the signal specifications. The pattern Σ (θ, φ) is detected (step ST4).
Since the directional antenna 3 is rotated and the antenna of the radio wave transmission source 1 is also rotated, the antenna pattern Σ (θ, φ) detected by the antenna pattern detection unit 6b is itself (directivity of the radio wave detector). The antenna pattern is a combination of the antenna pattern of the antenna 3) and the antenna pattern of the other party (the radio wave transmission source 1).
Note that the process of detecting the antenna pattern by the antenna pattern detection unit 6b is a known technique, and thus detailed description thereof is omitted.

In the own antenna pattern acquisition unit 11 of the identification processing unit 8, the antenna pattern detection unit 6a detects the antenna pattern Ω (θ, φ) of the other party (radio wave transmission source 1), and the antenna pattern detection unit 6b detects the combined antenna pattern Σ ( When (θ, φ) is detected, as shown below, the reception level of the antenna pattern Ω (θ, φ) of the other party (radio wave source 1) and the combined antenna pattern Σ (θ, φ) are compared in amplitude, The antenna pattern G (θ, φ) of itself (directional antenna 3 of the radio wave detector) is acquired (step ST5).
G (θ, φ) = Σ (θ, φ) / Ω (θ, φ)

When the own antenna pattern acquisition unit 11 acquires the antenna pattern G (θ, φ) of itself (directivity antenna 3 of the radio wave detection device), the radio wave arrival direction detection unit 12 of the identification processing unit 8 receives the antenna pattern G (θ , Φ), the arrival direction θm of the radio wave is detected (step ST6).
For example, the azimuth angle of the radio wave source that maximizes the amplitude value of the radio wave is detected as the radio wave arrival azimuth θm in the antenna pattern G (θ, φ).

  When the radio wave arrival direction detection unit 12 detects the radio wave arrival direction θm, the directional antenna control unit 13 of the identification processing unit 8 controls the actuator (not shown) of the directional antenna 3, for example. Processing for directing the directional antenna 3 in the arrival direction θm is performed (step ST7).

The radio wave source identifying unit 14 of the identification processing unit 8 has the antenna pattern Σ (θm detected by the antenna pattern detecting unit 6b after the directional antenna 3 is directed by the directional antenna control unit 13 in the arrival direction θm of the radio wave. , Φ) (hereinafter referred to as “detection antenna pattern”) (step ST8).
When the radio wave source specifying unit 14 acquires the detection antenna pattern Σ (θm, φ), the detection antenna pattern Σ (θm, φ) and a plurality of registered antenna patterns (for example, the individual A) registered by the database unit 7 are obtained. , The antenna pattern of the individual B, the antenna pattern of the individual C, etc.) (step ST9).
Note that the antenna pattern matching process itself in the radio wave source specifying unit 14 is a known technique, and thus detailed description thereof is omitted.

The radio wave source specifying unit 14 refers to the result of matching the antenna pattern and is most similar to the detected antenna pattern Σ (θm, φ) among the plurality of registered antenna patterns registered by the database unit 7. The registered antenna pattern is searched, and individual information of the radio wave source having the registered antenna pattern is output (step ST10).
Thereby, the individual identification process of the radio wave transmission source 1 emitting radio waves is completed.

  As is apparent from the above, according to the first embodiment, the antenna pattern detection unit 6a that detects the antenna pattern Ω (θ, φ) of the radio wave source 1 from the radio wave received using the omnidirectional antenna 2. And an antenna pattern detector 6b that detects an antenna pattern Σ (θ, φ) in which the antenna pattern of the directional antenna 3 and the antenna pattern of the radio wave source 1 are combined from the radio wave received using the directional antenna 3 And the amplitude value of the antenna pattern Ω (θ, φ) detected by the antenna pattern detection unit 6a and the amplitude value of the antenna pattern Σ (θ, φ) detected by the antenna pattern detection unit 6b are compared. A radio wave arrival direction detection unit 12 that detects the arrival direction θm, and directs the directional antenna 3 to the radio wave arrival direction θm detected by the radio wave arrival direction detection unit 12 The directional antenna control unit 13 is provided, and the radio wave source specifying unit 14 is detected by the antenna pattern detection unit 6b after the directional antenna 3 is directed to the arrival direction θm of the radio wave by the directional antenna control unit 13. An antenna pattern Σ (θm, φ) is acquired, and an antenna pattern that is most similar to the acquired antenna pattern Σ (θm, φ) is searched for from among a plurality of antenna patterns registered by the database unit 7. Since the radio wave source 1 having the antenna pattern is specified, the individual radio wave source can be identified with high accuracy.

Embodiment 2. FIG.
In the first embodiment, after the directional antenna 3 is directed to the arrival direction θm of the radio wave by the directional antenna control unit 13, the radio wave source specifying unit 14 detects the antenna pattern Σ detected by the antenna pattern detection unit 6b. Although (θm, φ) and a plurality of registered antenna patterns registered by the database unit 7 are collated, not only the antenna pattern Σ (θm, φ) for one rotation of the directional antenna 3 is shown. The antenna pattern Σ (θm, φ) for N rotations of the directional antenna 3 (N is an integer of 2 or more) is acquired, and the N antenna patterns Σ (θm, φ) are superimposed and synthesized. You may make it collate later antenna pattern (SIGMA) ((theta) m, (phi)) and the some registered antenna pattern registered by the database part 7. FIG.

Specifically, it is as follows.
FIG. 4 is a flowchart showing the processing contents of the radio wave detector according to the second embodiment of the present invention.

  When the radio wave arrival azimuth detection unit 12 detects the radio wave arrival azimuth θm, for example, the directional antenna control unit 13 of the identification processing unit 8 detects, for example, an actuator (not shown) of the directional antenna 3. To control the directivity antenna 3 in the arrival direction θm of the radio wave (step ST7).

The radio wave source identifying unit 14 of the identification processing unit 8 has the antenna pattern Σ (θm detected by the antenna pattern detecting unit 6b after the directional antenna 3 is directed by the directional antenna control unit 13 in the arrival direction θm of the radio wave. , Φ) (hereinafter referred to as “detection antenna pattern”).
Thereby, a detection antenna pattern Σ (θm, φ) for one rotation of the directional antenna 3 is obtained. In the second embodiment, an antenna pattern Σ (N−1 rotations of the directional antenna 3 is further provided. By obtaining [theta] m, [phi], an antenna pattern [Sigma] ([theta] m, [phi]) for N total turns is obtained (step ST11).

When the radio wave source specifying unit 14 acquires the antenna pattern Σ (θm, φ) for N shifts, the radio wave source specifying unit 14 combines the N antenna patterns Σ (θm, φ) by superimposing them (step ST12).
The radio wave source specifying unit 14 then combines the combined antenna pattern Σ (θm, φ) and a plurality of registered antenna patterns registered by the database unit 7 (for example, the antenna pattern of the individual A, the antenna pattern of the individual B, The antenna pattern of the individual C is compared (step ST13).

The radio wave source specifying unit 14 refers to the antenna pattern collation result, and is most similar to the combined antenna pattern Σ (θm, φ) among the plurality of registered antenna patterns registered by the database unit 7. The registered antenna pattern is searched, and the individual information of the radio wave source having the registered antenna pattern is output (step ST14).
Thereby, the individual identification process of the radio wave transmission source 1 emitting radio waves is completed.

  As is apparent from the above, according to the second embodiment, the antenna pattern detected by the antenna pattern detecting unit 6b after the directional antenna 3 is directed by the directional antenna control unit 13 in the arrival direction θm of the radio wave. Σ (θm, φ) is acquired a plurality of times, a plurality of antenna patterns are superimposed and combined, and the combined antenna pattern Σ (θm, φ) among the plurality of antenna patterns registered by the database unit 7 ) Is searched for and the radio wave source having the antenna pattern is specified, so that the antenna pattern Σ (θm, φ having higher accuracy than that of the first embodiment is obtained. ) Will be obtained. Therefore, there is an effect that the radio wave source can be identified with higher accuracy.

Embodiment 3 FIG.
FIG. 5 is a block diagram showing a radio wave detection apparatus according to Embodiment 3 of the present invention. In the figure, the same reference numerals as those in FIG.
The fixed directional antenna 9 is an antenna in which a plurality of elements are arranged on one surface and each element receives radio waves coming from a specific direction.
The identification processing unit 10 includes a local antenna pattern acquisition unit 11, a radio wave arrival direction detection unit 12, a directional antenna control unit 13, and a radio wave source identification unit 15. Perform individual identification processing.

6 is a block diagram showing the identification processing unit 10 of the radio wave detector according to the third embodiment of the present invention. In the figure, the same reference numerals as those in FIG.
The radio wave source specifying unit 15 is arranged so that the fixed directional antenna 9 is directed to the arrival direction θm of the radio wave by the directional antenna control unit 13 and then arranged on the fixed directional antenna 9 by the antenna pattern detection unit 6b. A plurality of antenna patterns respectively detected from the received radio waves of the element are acquired, the plurality of antenna patterns are superimposed and combined, and the combined antenna pattern among the plurality of antenna patterns registered in the database unit 7 The antenna pattern most similar to is searched, and a process of specifying a radio wave source having the antenna pattern is performed. The radio wave source specifying unit 15 constitutes radio wave source specifying means.

Each of the radio wave receiving units 4 and 5, the specification detection unit 6 and the identification processing unit 10 which are components of the radio wave detection device of FIG. 5 is dedicated hardware (for example, a semiconductor integrated circuit on which a CPU is mounted, or However, when the radio wave detection device is constituted by a computer, the processing contents of the radio wave reception units 4 and 5, the specification detection unit 6 and the identification processing unit 10 are as follows. The described program may be stored in a memory of a computer, and the CPU of the computer may execute the program stored in the memory.
FIG. 7 is a flowchart showing the processing contents of the radio wave detector according to Embodiment 3 of the present invention.

Next, the operation will be described.
In the first and second embodiments, an example in which the directional antenna 3 is a rotating antenna that rotates in a horizontal plane has been described. However, as illustrated in FIG. 5, N elements (N is 2 or more) on one surface. May be a fixed antenna in which an integer of
When the directional antenna 3 is directed after detecting the azimuth angle of the radio wave source 1 as the radio wave arrival azimuth θm, when the rotating directional antenna 3 is used as in the first and second embodiments, the minimum However, the antenna pattern Σ (θm, φ) cannot be detected unless the directional antenna 3 is rotated once.
When the fixed directional antenna 9 having N (for example, four) elements arranged on one surface is used as in the third embodiment, the arrival of radio waves without rotating the directional antenna once. The antenna pattern Σ (θm, φ) can be detected by direct-combining a plurality of antenna patterns detected from the received radio waves of each element on one surface close to the azimuth θm.

Specifically, it is as follows.
When the radio wave arrival direction detection unit 12 detects the radio wave arrival direction θm, the directional antenna control unit 13 of the identification processing unit 10 is fixed to the radio wave arrival direction θm as in the first and second embodiments. A process for directing the directional antenna 9 is performed (step ST15).

The radio wave source specifying unit 15 of the identification processing unit 10 includes the antenna pattern Σ detected by the antenna pattern detection unit 6b after the fixed directional antenna 9 is directed to the radio wave arrival direction θm by the directional antenna control unit 13. (Θm, φ) (hereinafter referred to as “detection antenna pattern”) is acquired.
In the third embodiment, N detection antenna patterns Σ respectively detected from the received radio waves of N elements arranged on one surface of the fixed directional antenna 9 oriented in the radio wave arrival direction θm. (Θm, φ) is acquired (step ST16).

When the radio wave source specifying unit 15 acquires N detection antenna patterns Σ (θm, φ), the radio wave transmission source specifying unit 15 directionally synthesizes the N detection antenna patterns Σ (θm, φ) (step ST17).
Then, the radio wave source specifying unit 15 collates the combined antenna pattern Σ (θm, φ) with a plurality of registered antenna patterns registered by the database unit 7 (step ST18).

The radio wave source specifying unit 15 refers to the antenna pattern matching result, and is most similar to the combined antenna pattern Σ (θm, φ) among the plurality of registered antenna patterns registered by the database unit 7. The registered antenna pattern is searched, and the individual information of the radio wave source having the registered antenna pattern is output (step ST19).
Thereby, the individual identification process of the radio wave transmission source 1 emitting radio waves is completed.

  As apparent from the above, according to the third embodiment, after the fixed directional antenna 9 is directed to the arrival direction θm of the radio wave by the directional antenna control unit 13, the fixed directional antenna 9 is fixed by the antenna pattern detection unit 6b. Obtaining a plurality of antenna patterns Σ (θm, φ) respectively detected from the received radio waves of each element arranged in the antenna 9 and superimposing and combining the plurality of antenna patterns Σ (θm, φ); Among the plurality of antenna patterns registered in the database unit 7, an antenna pattern most similar to the combined antenna pattern Σ (θm, φ) is searched for, and the radio wave source 1 having the antenna pattern is searched for. Since it is configured so as to specify, it is possible to reduce the time required for the directional antenna to rotate, and in a shorter time than the first and second embodiments, Σ (θm, φ) so obtained. Therefore, there is an effect that individual identification of the radio wave transmission source 1 can be performed in a shorter time. In addition, since the directional antenna is a fixed type, there is an effect that maintenance is easy.

  1 radio wave source, 2 omnidirectional antenna, 3 directional antenna, 4 radio wave receiver (first radio wave receiver), 5 radio wave receiver (second radio wave receiver), 6 specification detector, 6a antenna Pattern detection unit (first antenna pattern detection unit), 6b antenna pattern detection unit (second antenna pattern detection unit), 7 database unit (antenna pattern registration unit), 8 identification processing unit, 9 fixed directional antenna, DESCRIPTION OF SYMBOLS 10 Identification processing part, 11 Own antenna pattern acquisition part (radio wave arrival direction detection means), 12 Radio wave arrival direction detection part (radio wave arrival direction detection means), 13 Directional antenna control part (directional antenna control means), 14, 15 Radio wave source identification unit (radio wave source identification means).

Claims (3)

  Using a non-directional antenna that receives radio waves coming from all directions in a horizontal plane, first radio wave receiving means for receiving radio waves radiated from a radio wave source, and a specific direction while rotating in the horizontal plane The second radio wave receiving means for receiving the radio wave radiated from the radio wave source using the directional antenna for receiving the radio wave coming from the radio wave, and the radio wave received by the first radio wave receiving means The antenna pattern of the directional antenna and the antenna pattern of the radio wave source are synthesized from the radio wave received by the first antenna pattern detecting means for detecting the antenna pattern of the radio wave source and the second radio wave receiving means. Second antenna pattern detection means for detecting the antenna pattern registered, and antenna pattern registration means for registering the antenna patterns of a plurality of radio wave sources in advance. The amplitude value of the antenna pattern detected by the first antenna pattern detection means and the amplitude value of the antenna pattern detected by the second antenna pattern detection means to detect the arrival direction of the radio wave Radio wave arrival direction detection means, directivity antenna control means for directing the directional antenna in the radio wave arrival direction detected by the radio wave arrival direction detection means, and the directivity antenna control means causes the directional antenna to be The antenna pattern detected by the second antenna pattern detection unit is acquired after being directed to the arrival direction, and the acquired antenna pattern and the plurality of antenna patterns registered by the antenna pattern registration unit are Search for the most similar antenna pattern and Telecommunications apparatus for detecting a radio wave source identifying means for identifying a radio wave source to be.   The radio wave source specifying unit acquires the antenna pattern detected by the second antenna pattern detection unit a plurality of times after the directional antenna is directed to the arrival direction of the radio wave by the directional antenna control unit, and the plurality of antennas Overlay and combine the patterns, search for the antenna pattern that is most similar to the combined antenna pattern from among the multiple antenna patterns registered by the antenna pattern registration means, and transmit the radio wave having the antenna pattern 2. The radio wave detection apparatus according to claim 1, wherein a source is specified.   A first radio wave receiving means for receiving radio waves radiated from a radio wave source using a non-directional antenna that receives radio waves coming from all directions in a horizontal plane, and a plurality of elements are arranged on one surface A second radio wave receiving means for receiving the radio wave radiated from the radio wave source using the fixed directional antenna, and the radio wave source of the radio wave from the radio wave received by the first radio wave receiver. An antenna pattern in which an antenna pattern of the directional antenna and an antenna pattern of the radio wave source are synthesized from radio waves received by the first antenna pattern detecting means and the second radio wave receiving means. A second antenna pattern detecting means for detecting; an antenna pattern registering means for previously registering antenna patterns of a plurality of radio wave transmitting sources; A radio wave arrival direction detection means for detecting the arrival direction of a radio wave by comparing the amplitude value of the antenna pattern detected by the tena pattern detection means and the amplitude value of the antenna pattern detected by the second antenna pattern detection means; Directional antenna control means for directing the directional antenna in the direction of arrival of the radio wave detected by the radio wave arrival direction detection means, and after the directional antenna is directed by the directional antenna control means Acquiring a plurality of antenna patterns respectively detected from the received radio waves of the respective elements arranged in the directional antenna by the second antenna pattern detecting means, and superposing and combining the plurality of antenna patterns; Among multiple antenna patterns registered by the antenna pattern registration means, combining The antenna pattern most similar to it that the antenna pattern is searched and, radiolocation apparatus and a radio transmission source identification means for identifying a radio wave source with the antenna pattern.

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