JP2758545B2 - Radio wave reception / identification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave receiving / identifying apparatus for arriving radio waves such as a radar mounted on an aircraft or the like.

[0002]

2. Description of the Related Art FIG. 5 is a diagram showing a conventional radio wave receiving / identifying device. In FIG. A signal analyzing circuit for analyzing the pulse signal detected by the tuning receiving circuit 4; a pulse train detecting circuit 8 for classifying a plurality of pulses into a pulse train for each radio wave source;
Is a received radio wave source data storage memory for storing radio wave data of each radio wave source classified by the pulse train detection circuit 8, 11 is an identification table storing radio wave data of a radio wave source to be detected, and 12 is a received radio wave. An identification circuit which receives the output of the source data storage memory 9 and the identification table 11 and compares and compares them, and outputs the result; 13 is an identification result data storage memory;
14 is an identification result output terminal.

Next, the operation will be described. The tuning receiving circuit 4 detects the pulse signal input to the radio wave input terminal 1 while switching the tuning frequency in a time division manner. If the tuning receiving circuit 4 is not tuned to the frequency when the pulse signal arrives,
This is not detected. For each detected pulse, the signal analysis circuit 7 calculates the frequency, pulse width, amplitude, arrival direction, arrival time, and the like. Next, the pulse train detection circuit 8 classifies the plurality of pulses into a pulse train for each radio wave source, and stores radio wave data for each radio wave source in the received radio wave source data storage memory 9. Next, the identification circuit 12 compares and collates the specifications of the reception radio source data storage memory 9 with the specifications of the identification table 11 which stores the radio specifications of the radio source to be detected to identify the radio source name. The result is stored in the identification data storage memory 1
3 is stored. Then, the contents of the identification data storage memory are output from the identification result output terminal 14.

[0004]

Since the conventional radio wave receiving / identifying device is configured as described above, the device is always in the air regardless of the flight status (position, body attitude) of the aircraft on which the device is mounted. Must be tuned in order for all frequency bands to be targeted, and the tuning interval (from tuning to the next tuning) of a specific frequency is wide, so that the rate of enemies is low.
In addition, it takes a long time to identify because the radio wave specifications of each radio source are constantly checked against all the identification tables, and the erroneous identification of radio sources that cannot actually exist in the flight area occurs. was there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to limit the reception tuning frequency and the radio wave source to be identified based on the flight status of the aircraft which is the base machine of the apparatus, and to increase the detection probability. , Radio reception with low misidentification rate
The aim is to obtain an identification device.

[0006]

According to the present invention, there is provided a radio wave receiving / identifying apparatus which stores a plurality of tuning tables storing receiving tuning order and radio source information to be identified in accordance with a flight status of a base unit. A plurality of identification tables are switched and used.

When the input pulse signal is identified by performing the above-mentioned table switching, if the identification result is a specific one, the tuning table and the identification table to which the radio wave parameters belong are selected and used. It was done.

[0008]

According to the present invention, the receiving frequency band and the radio wave source to be identified are limited by the flight conditions, so that the receiving interval of the specific frequency is shortened, the detection rate and the response speed are improved, and the actual frequency cannot be present. Collation with the radio source information is not performed, and the false identification rate decreases.

When a radio source to be identified according to the flight situation is detected, if it is determined that the radio source is a specific radio source, a tuning table to which the radio wave data of the radio source belongs and an identification table are provided. Since each table is selected and used, it is possible to cope with a situation where the radio wave environment changes every moment, such as when a moving target is detected.

[0010]

【Example】

Embodiment 1 FIG. Hereinafter, a radio wave receiving / identifying apparatus according to a first embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the same reference numerals as those in FIG. 5 denote the same or corresponding parts, and 3 designates one of the tuning tables 2 composed of a plurality of tuning tables 21, 22,... , An identification table changeover switch circuit for selecting one of the identification tables 11 consisting of a plurality of identification tables 111, 112,..., 11n and connecting it to the identification circuit 12. 5 is a flight information input terminal for receiving flight information from a navigation device or the like;
Reference numeral 6 denotes a table switch control circuit that controls the switching operation of the tuning table changeover switch circuit 3 and the identification table changeover switch circuit 10 based on information input from the flight information input terminal 5. The tuning order of a plurality of frequency bands is preset in one table constituting the tuning table 2.

FIG. 2 shows the radio wave tuning / reception status in the flight areas A and B (horizontal axis: time, vertical axis: frequency). FIG. 2 (a) shows the state of the conventional radio wave reception identification device, and FIG.
(b) is the situation of the radio wave reception identification device according to the present invention.

Next, the operation will be described. When flight information such as the flight position and aircraft attitude of the aircraft serving as the mother machine is input from the flight information input terminal 5, the table switch control circuit 6 follows the information such as the flight area and attitude of the aircraft and tunes the table switch switching circuits 3 and 3. and controls the identification table switch switching circuit 10 is connected from the tuning table 2 and the identification table 11 synchronized table adapted to the situation of the mother machine, the identification table the tone receiver circuit 40, respectively, the identification circuit 12.

Thereafter, the pulse signal input from the radio wave input terminal 1 is detected by the tuning receiving circuit 40 at a limited tuning frequency according to the flight information, and the identification circuit 12 identifies the identification signal limited according to the flight information. The identification result is output from the output terminal 14 with reference to the target radio wave source.

As described above, according to this embodiment, the pulse signal is received and tuned by the limited optimum tuning frequency based on the flight information of the aircraft serving as the base unit, so that the tuning interval of the specific frequency becomes narrow. , Increase the probability of enemy. In addition, by comparing the received and tuned pulse signal with an identification table limited based on the flight information, the detection time can be reduced, and the probability of erroneous recognition can be reduced.

Embodiment 2 FIG. Next, a radio wave receiving / identifying apparatus according to a second embodiment of the present invention will be described. In the first embodiment, each of a plurality of tuning tables and identification tables
One table is selected for tuning and identification.
In the present embodiment, a plurality of tuning tables and identification tables are selected based on the flight information, and the selected tables are sequentially switched to perform processing upon tuning reception and identification comparison / collation.

In FIG. 3, reference numeral 15 denotes a tuning table selection circuit, and reference numeral 16 denotes an identification table selection circuit, which is capable of simultaneously selecting a plurality of tuning tables and identification tables. 6a is a tuning table selection circuit 1 based on the flight information input from the flight information input terminal 5.
5, a table switch control circuit that outputs a control signal to the identification table selection circuit 16 to select a plurality of tuning tables and identification tables. Tuning table 2
The tuning order of a single frequency band is preset in one table constituting 0.

Next, the operation will be described. Flight information (position, body attitude, etc.) of the aircraft serving as the base machine is input from the flight information input terminal 5, and the table switch control circuit 6a controls the tuning table selection circuit 15, the identification table selection circuit according to the flight area, attitude, etc. of the body. 16 is connected to a plurality of tuning tables and a plurality of identification tables adapted to the situation of the mother machine.

As a result, the tuning receiving circuit 40 detects while switching the tuning frequency in a time-division manner in accordance with the tuning frequency and the tuning order of the plurality of tuning tables connected by the flight information tuning table selecting circuit 15 (for example, a plurality of tunings). After switching the tuning frequency according to the tuning table 201 of the table 20 and performing tuning and reception in a plurality of frequency bands,
The tuning frequency is switched in accordance with 02, and tuning and reception are performed in a plurality of frequency bands different from those in the case of the tuning table 201). The identification circuit 12 compares and compares the specifications of the reception radio source data storage memory 9 with the specifications of the plurality of identification tables 11 connected by the identification table selection circuit 16 to identify the radio source name. Is stored in the identification data storage memory 13.
(For example, the identification table 1 of the plurality of identification tables 11
After comparison and collation with a plurality of radio source data shown in FIG. 11, comparison and collation with a plurality of radio source data shown in the identification table 112 are performed.

Thereafter, the pulse signal input from the radio wave input terminal 1 is sequentially detected by the tuning receiving circuit 40 at a plurality of limited tuning frequencies corresponding to the flight information, and the identification circuit 12 limits the pulse signal according to the flight information. The plurality of identified identification target radio sources are sequentially compared and referenced, and the identification result is output from the output terminal 14.

With the above configuration, the first
The number of information to be preset in each of the tables 201 to 20n constituting the tuning table 20 can be reduced as compared with the embodiment, and the size of the apparatus can be reduced.

Embodiment 3 FIG. Next, a radio wave receiving / identifying device according to a third embodiment of the present invention will be described. In the first and second embodiments, the status of the mother machine is input from another device (such as a navigation device). However, in this embodiment, when a specific radio wave source is identified as an occurrence event, The tuning table and the identification table are switched based on the recognition result.

In FIG. 4, reference numeral 17 denotes a specific target identification corresponding switch control circuit which tunes and identifies a pulse train input to the radio wave input terminal 1, and switches the tuning table switching switch circuit 3 and the identification table based on the recognition result. It controls the switch circuit 10.

Next, the operation will be described. In the operation of the first embodiment, the identification circuit 12 determines the specifications of the reception radio source data storage memory 9 while limiting the reception frequency band and the radio wave source to be identified based on the flight information. As a result of comparison and collation with the specifications of the identification table 11, if the obtained result is a specific radio wave specified in advance in the identification table 11, the specific target identification corresponding switch control circuit 1
The tuning table switch switching circuit 3 and the identification table switch switching circuit 10 are controlled by 7 and are connected to a tuning table and an identification table for detecting a related radio wave source (for example, a radar operated in conjunction).

With the above configuration, the first
In addition to the effects of the embodiment, the detection speed of the related radio wave source (such as a radar operated in conjunction) when the specific radio wave is detected can be improved, and the tracking speed of the moving target can be improved. It can cope with a changing radio environment.

In the third embodiment, the switch of the first embodiment is provided with the switch control circuit corresponding to the specific target identification. However, in the second embodiment, the switch control corresponding to the specific target identification is similarly performed. A circuit may be provided.

[0026]

As described above, according to the radio wave receiving / identifying apparatus of the present invention, the reception tuning frequency band and the radio wave source to be identified are limited according to the flight status of the aircraft serving as the base unit. With the configuration, there is an effect that the detection probability and the detection response speed are improved, and the erroneous identification probability is reduced.

In addition, the reception tuning frequency band and the radio wave source to be identified to be checked are limited according to the flight status. On the other hand, when it is determined that the radio wave source is a specified radio wave source, it belongs to the radio wave specification of the radio wave source. Detection is limited to the reception tuning frequency band and the radio wave source to be identified, so that the detection probability can be increased even when the radio wave environment changes every moment, such as when tracking a moving target. There is.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a radio wave receiving / identifying device according to a first embodiment of the present invention.

FIG. 2 is a diagram for comparing tuning and reception states according to the present invention and a conventional technique.

FIG. 3 is a configuration diagram of a radio wave receiving / identifying device according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a radio wave receiving / identifying device according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional radio wave reception / identification device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 radio wave input terminal 2 tuning table 3 tuning table switching switch circuit 40 tuning receiving circuit 5 flight information input terminal 6 table switch control circuit 6a table switch control circuit 7 signal analysis circuit 8 pulse train detection circuit 9 reception radio source data storage circuit 10 identification table Changeover switch circuit 11 Identification table 12 Identification circuit 13 Identification result data storage memory 14 Identification result output terminal 15 Tuning table selection circuit 16 Identification table selection circuit 17 Specific target identification corresponding switch control circuit

Claims (4)

(57) [Claims] An analysis is made of the radio wave characteristics of each input pulse signal detected while switching the tuning frequency in a time-division manner, and this is compared with the data of a known radio wave to be identified. In a radio wave receiving / identifying device for identification, a plurality of tuning tables storing a tuning order for tuning a receiver to a predetermined frequency divided for each frequency, and a predetermined one selected from the tuning tables are selected. A tuning table selecting means for connecting to the receiver, a pulse train detecting circuit for analyzing radio wave specifications of each of the tuned received pulse signals for each radio source, and Identification table divided and stored on the basis of the above, identification table selecting means for selecting a predetermined one from the identification table, and radio wave parameters stored in the selected identification table And an identification circuit for comparing and comparing the analyzed radio signal with the radio wave specifications of the analyzed pulse signal; and a table selection control means for controlling the selection operation of the tuning table selection means and the identification table selection means in response to the flight information of the aircraft. A radio wave receiving / identifying device comprising: 2. The radio wave reception / identification device according to claim 1, wherein said table selection control means causes said tuning table selection means to select a predetermined single one from said plurality of tuning tables. A radio wave receiving / identifying apparatus for controlling the identification table selecting means to select a predetermined single one from the plurality of identification tables. 3. The radio wave reception / identification device according to claim 1, wherein said table selection control means controls said tuning table selection means to select a predetermined plurality of tuning tables from said plurality of tuning tables. A radio wave receiving / identifying device, wherein the identification table selecting means controls to select a predetermined plurality of identification tables from the plurality of identification tables. 4. The radio wave receiving / identifying device according to claim 2, wherein, if the comparison and collation result in said discriminating circuit is one designated in advance, a tuning table to which radio wave data of said radio source belongs and an identification table. A radio wave reception / identification device comprising a second table selection control means for selecting a table.