JPH09257913A - Interference wave identifying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable identification of the reflection wave of an interference wave by providing a first filter passing the basic wave of the interference wave or target reflection wave, second filter passing the two-times high frequency wave of interference wave, and interference wave determination unit determining and processing the reflection wave of interference wave. SOLUTION: In relation of the intermediate frequency signal of a reception signal frequency converted, the basic wave interference frequency signal of an interference wave or reflection wave interference frequency signal is passed through a first filter 17a and the two-times high frequency intermediate frequency signal of an interference wave is passed through a second filter 17b. Then an interference wave determining unit 24 determines that the wave is the interference wave or the reflection wave 4 from a target 1 based on whether it passes through the two-times high frequency intermediate frequency signal passed through the second filter 17b or not, and when the interference wave is received, the signal is not sent to a signal processor 21, and when the reflection wave 4 from the target 1 is received, the signal is sent to the unit 21. A missile can identify the interference wave in this way and a signal processing is made to pursuit only the reflection wave 4 from the target 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明は目標に向かって飛
しょうするミサイルが目標側から放射される妨害波と目
標からの反射波を識別する妨害波識別装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interference wave discriminating apparatus for discriminating between a disturbance wave emitted from a target side and a reflected wave from the target by a missile flying toward the target.

【０００２】[0002]

【従来の技術】まず目標とその目標に向かって飛しょう
するミサイルとの関係を図６を用いて説明する。図６に
おいて１は目標、２は目標１に向かって飛しょうするミ
サイル、３はミサイル２が放射する送信波、４はミサイ
ル２の送信波３に対する目標１からの反射波であり、ミ
サイル２はこの反射波４をもとに目標１に向かって飛し
ょうしていく。2. Description of the Related Art First, the relationship between a target and a missile flying toward the target will be described with reference to FIG. In FIG. 6, 1 is a target, 2 is a missile flying toward the target 1, 3 is a transmitted wave emitted by the missile 2, 4 is a reflected wave from the target 1 with respect to the transmitted wave 3 of the missile 2, and the missile 2 is Based on this reflected wave 4, fly toward the target 1.

【０００３】ところで図６に示すような目標１とミサイ
ル２との関係において、実際の場においては図７に示す
ように目標１からミサイル２を欺まんさせるための妨害
装置５が目標１の上空に打ち上げられる。この妨害装置
５から妨害波６がミサイル２に向けて放射される。By the way, in the relationship between the target 1 and the missile 2 as shown in FIG. 6, in an actual situation, as shown in FIG. 7, the jamming device 5 for deceiving the missile 2 from the target 1 is over the target 1. Will be launched. A disturbing wave 6 is radiated from the disturbing device 5 toward the missile 2.

【０００４】ここで妨害波６と反射波４についてさらに
詳しく説明する。はじめに妨害波６について図８を用い
て説明する。図８において横軸は周波数、縦軸は妨害波
の強度を示すレベルである。妨害装置５が妨害波６を放
射する仕組みは、妨害装置５がミサイル２の送信波３を
受信すると妨害装置５はミサイル２の送信波３をいった
ん量子化して記憶し、その後、その記憶したデータをも
とに妨害波６を発生するようになっている。このため妨
害波６にはミサイル２の送信波３の周波数が基本波信号
７として含まれ、その他に基本波７の２倍高調波信号８
と３倍高調波信号９が含まれる。なお図８においては説
明の便宜上第３高調波以上を省略してある。次に反射波
４について図９を用いて説明する。図９は反射波４に含
まれる周波数を示してあり、この周波数はミサイル２の
送信波３に対する目標からの反射波４の周波数であるた
め、ミサイル２の送信波３の周波数と同じである。なお
図９において横軸は周波数、縦軸は反射波の強度を示す
レベルである。Here, the interfering wave 6 and the reflected wave 4 will be described in more detail. First, the interference wave 6 will be described with reference to FIG. In FIG. 8, the horizontal axis is the frequency and the vertical axis is the level indicating the intensity of the interfering wave. The mechanism in which the jamming device 5 radiates the jamming wave 6 is such that when the jamming device 5 receives the transmission wave 3 of the missile 2, the jamming device 5 quantizes the transmission wave 3 of the missile 2 once, and stores the quantized data. The interference wave 6 is generated based on Therefore, the interference wave 6 contains the frequency of the transmission wave 3 of the missile 2 as the fundamental wave signal 7, and the second harmonic signal 8 of the fundamental wave 7 is included in the others.
And the third harmonic signal 9 is included. Note that, in FIG. 8, the third harmonic and higher harmonics are omitted for convenience of description. Next, the reflected wave 4 will be described with reference to FIG. FIG. 9 shows the frequency contained in the reflected wave 4, and since this frequency is the frequency of the reflected wave 4 from the target for the transmitted wave 3 of the missile 2, it is the same as the frequency of the transmitted wave 3 of the missile 2. In FIG. 9, the horizontal axis represents frequency and the vertical axis represents the level of reflected wave intensity.

【０００５】図１０は従来のミサイルのレーダー部１０
のブロック図であり、図において１１は送信時には送信
波３を目標１に向けて放射し、受信時には送信波３に対
する目標１からの反射波４を受信するアンテナ装置、１
２は送信時にはアンテナ装置１１へ送信信号を出力し、
受信時にはアンテナ装置１１からの受信信号を出力する
送受切換器、１３は送信時に送信信号を増幅する増幅
器、１４は送信信号に変調をかける変調器、１５は受信
時に受信信号に対して周波数変換する際に用いる信号を
発生する局部発振器、１６は受信時に送受切換器１２を
介して入力される受信信号と局部発振器１５から入力さ
れる信号の差である中間周波数信号を出力するミキサ、
１７は送信波３に対する目標１からの反射波４を通過可
能にするフィルタであってそれ以外の帯域は制限される
特徴を有する。１８は中間周波数信号を増幅する中間周
波数増幅器、１９は中間周波数信号を検波する検波器、
２０は検波後のビデオ信号を増幅するビデオ増幅器、２
１は送信波３に対する目標１からの反射波４の受信信号
のビデオ信号について信号処理を行う信号処理部であ
る。FIG. 10 shows a radar section 10 of a conventional missile.
11 is a block diagram of an antenna device for radiating a transmission wave 3 toward a target 1 at the time of transmission and receiving a reflected wave 4 from the target 1 for the transmission wave 3 at the time of reception, 1
2 outputs a transmission signal to the antenna device 11 during transmission,
A transmission / reception switch that outputs a reception signal from the antenna device 11 at the time of reception, 13 is an amplifier that amplifies the transmission signal at the time of transmission, 14 is a modulator that modulates the transmission signal, and 15 is frequency-converts the reception signal at the time of reception. A local oscillator that generates a signal used at the time, a mixer 16 that outputs an intermediate frequency signal that is a difference between a reception signal input through the duplexer 12 and a signal input from the local oscillator 15 at the time of reception,
Reference numeral 17 is a filter that allows the reflected wave 4 from the target 1 for the transmitted wave 3 to pass therethrough, and has a characteristic that the other bands are limited. 18 is an intermediate frequency amplifier for amplifying the intermediate frequency signal, 19 is a detector for detecting the intermediate frequency signal,
20 is a video amplifier for amplifying the detected video signal, 2
Reference numeral 1 denotes a signal processing unit that performs signal processing on the video signal of the received signal of the reflected wave 4 from the target 1 with respect to the transmitted wave 3.

【０００６】ここでフィルタ１７についてさらに詳しく
説明する。図１１はフィルタ１７の周波数特性２２を示
すもので、横軸は周波数である。ミサイル２が妨害波６
を受信した場合、まず妨害波６は周波数変換されフィル
タ１７通過後はフィルタ１７の周波数特性上妨害波６に
含まれるミサイル２の送信波３の２倍高調波信号８の中
間周波数信号と３倍高調波信号９の中間周波数信号は帯
域制限され、図１２に示すような妨害波６に含まれる基
本波中間周波数信号７ａのみが存在する。一方ミサイル
２が目標１からの反射波４を受信した場合、まず反射波
４は周波数変換されフィルタ１７通過後はフィルタ１７
の周波数特性上図１３に示すように反射波中間周波数信
号４ａが存在する。このためフィルタ１７を用いるとフ
ィルタ１７以降の信号では妨害波６と反射波４の区別が
つかない。なお、図１２と図１３において横軸は周波
数、縦軸は強度を示すレベルである。The filter 17 will now be described in more detail. FIG. 11 shows the frequency characteristic 22 of the filter 17, where the horizontal axis is the frequency. Missile 2 is jammer 6
When the interference wave 6 is received, the frequency of the interference wave 6 is first converted, and after passing through the filter 17, the intermediate frequency signal of the harmonic wave signal 8 of the double harmonic wave signal 8 of the transmission wave 3 of the missile 2 included in the interference wave 6 due to the frequency characteristic of the filter 17 is tripled. The intermediate frequency signal of the harmonic signal 9 is band-limited, and only the fundamental intermediate frequency signal 7a included in the interfering wave 6 as shown in FIG. 12 exists. On the other hand, when the missile 2 receives the reflected wave 4 from the target 1, the reflected wave 4 is first frequency-converted and, after passing through the filter 17, the filter 17
The reflected wave intermediate frequency signal 4a exists as shown in FIG. Therefore, when the filter 17 is used, the interfering wave 6 and the reflected wave 4 cannot be distinguished from each other in the signal after the filter 17. 12 and 13, the horizontal axis represents frequency and the vertical axis represents level indicating intensity.

【０００７】[0007]

【発明が解決しようとする課題】ところでこのような従
来のミサイルのレーダー部１０は、フィルタ１７によっ
て受信帯域を設けているため、妨害波６を受信した場合
においてフィルタ１７通過後の受信信号には妨害波６の
中に含まれるミサイル２の送信波３の２倍高調波信号８
と３倍高調波信号９を検出することはできない。このた
めミサイルのレーダー部１０は上記妨害波６と反射波４
との区別がつかないまま目標追尾の信号処理をしてしま
うので、ミサイル２が妨害装置５を追尾して目標１を追
尾できなくなるという問題点があった。By the way, since the radar section 10 of such a conventional missile is provided with the reception band by the filter 17, when the interference wave 6 is received, the received signal after passing through the filter 17 is Double harmonic signal 8 of the transmitted wave 3 of the missile 2 included in the disturbing wave 6
And the triple harmonic signal 9 cannot be detected. Therefore, the radar section 10 of the missile has the above-mentioned interfering wave 6 and reflected wave 4
Since the target tracking signal processing is performed indistinguishable from the target, there is a problem that the missile 2 cannot track the target 1 by tracking the jamming device 5.

【０００８】この発明は、上記の問題点を解決するため
になされたもので、ミサイルのレーダー部１０を妨害波
６に含まれるミサイル２の送信波３の２倍高調波信号８
を検出できるように改良し、２倍高調波信号８が検出さ
れれば妨害波６があり、反対に検出されなければミサイ
ル２の送信波３に対する目標１からの反射波４であると
識別する機能を持たせミサイル２を提案する。The present invention has been made to solve the above-mentioned problems, and the radar section 10 of the missile includes a double harmonic signal 8 of the transmission wave 3 of the missile 2 included in the interfering wave 6.
Is detected so that if the second harmonic signal 8 is detected, there is an interfering wave 6, and if not, it is identified as a reflected wave 4 from the target 1 to the transmitted wave 3 of the missile 2. Propose Missile 2 with functions.

【０００９】[0009]

【課題を解決するための手段】第１の発明による妨害波
識別装置では、ミサイルが受信した受信信号を局部発振
器によって中間周波数信号に周波数変換し、分配器によ
ってこの中間周波数信号を分配した後、一方は送信波に
対する目標からの反射波の中間周波数信号と妨害波の中
に含まれる基本波信号の中間周波数信号を通過可能にす
る第１のフィルタに入力し、もう一方は妨害波の中に含
まれる２倍高調波信号の中間周波数信号を通過可能にす
る第２のフィルタに入力する。この時、受信信号が第２
のフィルタを通過せず信号が出力されなければ受信波は
目標からの反射波であるとして妨害波判定部は第１のフ
ィルタを通過した中間周波数信号を信号処理部へそのま
ま出力し、反対に受信信号が第２のフィルタを通過し信
号が出力されていれば受信波は妨害波であるとして妨害
波判定部は信号処理部へ何も出力しないようにすること
によって妨害波については信号処理をしないようにし
た。In the interference wave identifying apparatus according to the first aspect of the invention, the received signal received by the missile is frequency-converted into an intermediate frequency signal by the local oscillator, and the intermediate frequency signal is distributed by the distributor. One is input to the first filter that allows passage of the intermediate frequency signal of the reflected wave from the target for the transmitted wave and the intermediate frequency signal of the fundamental wave signal contained in the interfering wave, and the other is input to the interfering wave. It is input to a second filter that allows passage of the intermediate frequency signal of the included double harmonic signal. At this time, the received signal is the second
If the signal is not output without passing through the filter, the received wave is a reflected wave from the target, and the interfering wave determination unit outputs the intermediate frequency signal that has passed through the first filter to the signal processing unit as it is, and on the contrary, receives it. If the signal passes through the second filter and is output, the received wave is an interfering wave, and the interfering wave determining section does not output anything to the signal processing section, so that the interfering wave is not processed. I did it.

【００１０】また、第２の発明による妨害波識別装置で
は、ミサイルが受信した受信信号を分配器によって分配
し、一方は送信波に対する目標からの反射波信号と妨害
波の中に含まれる基本波信号を通過可能にする第１のフ
ィルタに入力し、もう一方は妨害波の中に含まれる２倍
高調波信号を通過可能にする第２のフィルタに入力し、
その後それぞれ局部発振器によって中間周波数信号に周
波数変換する。この時、受信信号が第２のフィルタを通
過せず信号が出力されなければ受信波は目標からの反射
波であるとして妨害波判定部は第１のフィルタを通過し
た信号の中間周波数信号を信号処理部へそのまま出力
し、反対に受信信号が第２のフィルタを通過し信号が出
力されていれば受信波は妨害波であるとして妨害波判定
部は信号処理部へ何も出力しないようにすることによっ
て妨害波については信号処理をしないようにした。Further, in the interference wave identifying apparatus according to the second aspect of the invention, the received signal received by the missile is distributed by the distributor, and one of them is the reflected wave signal from the target for the transmitted wave and the fundamental wave contained in the interference wave. Input to the first filter that allows the signal to pass, the other input to the second filter that allows the second harmonic signal contained in the interference wave to pass,
After that, the respective local oscillators perform frequency conversion into intermediate frequency signals. At this time, if the received signal does not pass through the second filter and no signal is output, it is determined that the received wave is a reflected wave from the target, and the interfering wave determination unit outputs the intermediate frequency signal of the signal passed through the first filter. If the received signal passes through the second filter and a signal is output, the received wave is an interfering wave and the interfering wave determination section does not output anything to the signal processing section. As a result, no signal processing was performed on the interfering wave.

【００１１】[0011]

【発明の実施の形態】BEST MODE FOR CARRYING OUT THE INVENTION

実施の形態１．図１はこの発明の実施の形態１を示す構
成図であり、図において１１は送信時には送信波３を目
標に向けて放射し、受信時には送信波３に対する目標１
からの反射波４を受信するアンテナ装置、１２は送信時
にはアンテナ装置１１へ送信信号を出力し、受信時には
アンテナ装置１１からの受信信号を出力する送受切換
器、１３は送信時に送信信号を増幅し送受切換器１２へ
出力する増幅器、１４は送信信号に変調をかけて増幅器
１３へ出力する変調器、１５は受信時に受信信号に対し
て周波数変換する際に用いる信号を発生する局部発振
器、１６は受信時に送受切換器１２を介して入力される
受信信号と局部発振器１５から入力される信号の差であ
る中間周波数信号を出力するミキサ、２３はミキサから
入力される中間周波数信号を分配する分配器、１７ａ，
１７ｂは上記分配器２３の分配出力をそれぞれ入力する
フィルタであって、１７ａは送信波３に対する目標１か
らの反射波４の中間周波数信号と妨害波６の中に含まれ
る基本波信号７の中間周波数信号を通過可能にする第１
のフィルタ、１７ｂは妨害波６の中に含まれる２倍高調
波信号８の中間周波数信号を通過可能にする第２のフィ
ルタ、１８ａ，１８ｂは上記第１及び第２のフィルタ１
７ａ，１７ｂにそれぞれ対応し中間周波数信号を増幅す
る第１及び第２の中間周波数増幅器、１９ａ，１９ｂは
上記第１及び第２の中間周波数増幅器１８ａ，１８ｂに
それぞれ対応し中間周波数信号を検波する第１及び第２
の検波器、２０ａ，２０ｂは上記第１及び第２の検波器
１９ａ，１９ｂにそれぞれ対応し検波後のビデオ信号を
増幅する第１及び第２のビデオ増幅器、２４は上記第１
及び第２のビデオ増幅器２０ａ，２０ｂの出力を入力
し、第２のフィルタ１７ｂを信号が通過してこなかった
場合は受信波は目標１からの反射波４であるとして第１
のフィルタ１７ａを通過した中間周波数信号をそのまま
出力し、反対に第２のフィルタ１７ｂを信号が通過して
きた場合は受信波は妨害波６であるとして受信信号を出
力しない妨害波判定部、２１は妨害波判定部２４出力で
ある送信波３に対する目標１からの反射波４の受信信号
のビデオ信号について信号処理を行う信号処理部であ
り、１０は以上から構成されるミサイルのレーダー部で
ある。Embodiment 1. 1 is a block diagram showing a first embodiment of the present invention. In FIG. 1, reference numeral 11 radiates a transmission wave 3 toward a target at the time of transmission and targets 1 to the transmission wave 3 at the time of reception.
An antenna device for receiving the reflected wave 4 from the device, 12 outputs a transmission signal to the antenna device 11 at the time of transmission and outputs a reception signal from the antenna device 11 at the time of reception, and 13 amplifies the transmission signal at the time of transmission. An amplifier for outputting to the duplexer 12, a modulator 14 for modulating a transmission signal and outputting it to the amplifier 13, a local oscillator 15 for generating a signal used for frequency conversion of a reception signal at the time of reception, and 16 for A mixer that outputs an intermediate frequency signal that is a difference between a reception signal that is input via the transmission / reception switch 12 and a signal that is input from the local oscillator 15 during reception, and 23 is a distributor that distributes the intermediate frequency signal input from the mixer. , 17a,
Reference numeral 17b is a filter for inputting the distribution output of the distributor 23, and 17a is an intermediate frequency signal of the reflected wave 4 from the target 1 to the transmission wave 3 and the fundamental wave signal 7 contained in the interfering wave 6. First to allow frequency signals to pass
17b is a second filter that allows an intermediate frequency signal of the second harmonic signal 8 contained in the interfering wave 6 to pass therethrough, and 18a and 18b are the first and second filters 1 described above.
First and second intermediate frequency amplifiers 19a and 19b corresponding to 7a and 17b and amplifying the intermediate frequency signal, and 19a and 19b corresponding to the first and second intermediate frequency amplifiers 18a and 18b, respectively, and detect the intermediate frequency signal. First and second
Detectors 20a and 20b correspond to the first and second detectors 19a and 19b, respectively, and are first and second video amplifiers for amplifying the detected video signal, and 24 is the first detector.
And the outputs of the second video amplifiers 20a and 20b are input, and when the signal does not pass through the second filter 17b, the received wave is the reflected wave 4 from the target 1
If the intermediate frequency signal that has passed through the filter 17a is output as it is, and if the signal has passed through the second filter 17b, on the contrary, the received wave is the interference wave 6 and the interference wave determination unit that does not output the reception signal, 21 Reference numeral 10 denotes a signal processing unit that performs signal processing on the video signal of the received signal of the reflected wave 4 from the target 1 with respect to the transmitted wave 3 that is the output of the interference wave determination unit 24, and 10 is the radar unit of the missile configured as above.

【００１２】次に実施の形態１の動作を説明する。妨害
機５から図８に示す周波数を持つ妨害波６を受信した時
は、アンテナ装置１１から送受切換器１２を介し入力し
た妨害波６と局部発振器１５で発生する信号とをミキサ
１６に入力し妨害波６の中間周波数信号を求める。この
中間周波数信号を分配器２３で分配し、分配された一つ
は図２に示す周波数特性を持った第１のフィルタ１７ａ
によって妨害波６の中間周波数信号の中に含まれる図３
に示す基本波中間周波数信号７ａを通過させ、この基本
波中間周波数信号７ａを中間周波数増幅器１８ａで増幅
し、検波器１９ａに入力してビデオを求め、ビデオ増幅
器２０ａで増幅する。もう一つは図２に示す周波数特性
を持った第２のフィルタ１７ｂによって妨害波６の中間
周波数信号の中に含まれる図３に示すような２倍高調波
中間周波数信号８ａを通過させ、この２倍高調波中間周
波数信号８ａを中間周波数増幅器１８ｂで増幅し、検波
器１９ｂに入力してビデオを求め、ビデオ増幅器２０ｂ
で増幅する。次に上記２つの系の信号が妨害波判定部２
４に入力され、妨害波判定部２４では第２のフィルタ１
７ｂを通過してきた２倍高調波中間周波数信号８ａを検
出し受信した信号を妨害波６とし、受信信号を信号処理
部２１へ出力しない処理をする。一方図９に示す周波数
を持つ目標１からの反射波４を受信した時は、アンテナ
装置１１から送受切換器１２を介し入力した反射波４と
局部発振器１５で発生する信号とをミキサ１６に入力し
反射波４の中間周波数信号を求める。この中間周波数信
号を分配器２３で分配し、分配された一つは図２に示す
周波数特性を持った第１のフィルタ１７ａによって図４
に示すような反射波中間周波数信号４ａを通過させ、こ
の反射波中間周波数信号４ａを中間周波数増幅器１８ａ
で増幅し、検波器１９ａに入力してビデオを求め、ビデ
オ増幅器２０ａで増幅する。もう一つは図２に示す周波
数特性を持った第２のフィルタ１７ｂによって帯域制限
されるため第２のフィルタ１７ｂ以降に信号は生じな
い。このため妨害波判定部２４では第２のフィルタ１７
ｂを信号が通過してこなかったので受信した信号を目標
１からの反射波４とし、第１のフィルタ１７ａを通過し
てきた中間周波数信号をそのまま信号処理部２１へ出力
する処理をする。以上のようにして妨害波６を受信した
時は信号処理部２１へ信号を送らず、目標１からの反射
波４を受信した時は信号処理部２１へ信号を送ることに
よって、ミサイルは妨害波を識別し目標１からの反射波
４のみについて追尾の信号処理を可能にした。Next, the operation of the first embodiment will be described. When the interfering wave 6 having the frequency shown in FIG. 8 is received from the interfering device 5, the interfering wave 6 input from the antenna device 11 through the duplexer 12 and the signal generated by the local oscillator 15 are input to the mixer 16. An intermediate frequency signal of the interfering wave 6 is obtained. This intermediate frequency signal is distributed by the distributor 23, one of which is the first filter 17a having the frequency characteristic shown in FIG.
3 included in the intermediate frequency signal of the interfering wave 6 by
The fundamental wave intermediate frequency signal 7a shown in (1) is passed, the fundamental wave intermediate frequency signal 7a is amplified by the intermediate frequency amplifier 18a, input to the detector 19a to obtain the video, and amplified by the video amplifier 20a. The other is to pass the double harmonic intermediate frequency signal 8a as shown in FIG. 3 contained in the intermediate frequency signal of the interfering wave 6 by the second filter 17b having the frequency characteristic shown in FIG. The second harmonic intermediate frequency signal 8a is amplified by the intermediate frequency amplifier 18b and input to the detector 19b to obtain a video, and the video amplifier 20b
Amplify with Next, the signals of the above-mentioned two systems are the interference wave determination unit 2
4 is input to the second filter 1 in the interference wave determination unit 24.
The double harmonic intermediate frequency signal 8a that has passed through 7b is detected, the received signal is set as the interfering wave 6, and the received signal is not output to the signal processing unit 21. On the other hand, when the reflected wave 4 from the target 1 having the frequency shown in FIG. 9 is received, the reflected wave 4 input from the antenna device 11 via the duplexer 12 and the signal generated by the local oscillator 15 are input to the mixer 16. Then, the intermediate frequency signal of the reflected wave 4 is obtained. The intermediate frequency signal is distributed by the distributor 23, and one of the distributed signals is distributed by the first filter 17a having the frequency characteristic shown in FIG.
The reflected wave intermediate frequency signal 4a as shown in FIG.
And the video signal is input to the detector 19a to obtain a video, which is then amplified by the video amplifier 20a. The other is band-limited by the second filter 17b having the frequency characteristic shown in FIG. 2, so that no signal is generated after the second filter 17b. Therefore, in the interference wave determination unit 24, the second filter 17
Since the signal has not passed through b, the received signal is set as the reflected wave 4 from the target 1, and the intermediate frequency signal that has passed through the first filter 17a is output to the signal processing unit 21 as it is. As described above, when the interference wave 6 is received, the signal is not sent to the signal processing unit 21, and when the reflected wave 4 from the target 1 is received, the signal is sent to the signal processing unit 21. And the tracking signal processing was enabled only for the reflected wave 4 from the target 1.

【００１３】実施の形態２．図５はこの発明の実施の形
態２を示す構成図であり、図において１１は送信時には
送信波３を目標１に向けて放射し、受信時には送信波３
に対する目標１からの反射波４を受信するアンテナ装
置、１２は送信時にはアンテナ装置１１へ送信信号を出
力し、受信時にはアンテナ装置１１からの受信信号を出
力する送受切換器、１３は送信時に送信信号を増幅し送
受切換器１２へ出力する増幅器、１４は送信信号に変調
をかけて増幅器１３へ出力する変調器、２３は送受切換
器から入力される受信信号を分配する分配器、１７ａ，
１７ｂは上記分配器２３の分配出力をそれぞれ入力する
フィルタであって、１７ａは送信波３に対する目標１か
らの反射波４と妨害波６の中に含まれる基本波信号７を
通過可能にする第１のフィルタ、１７ｂは妨害波６の中
に含まれる２倍高調波信号８を通過可能にする第２のフ
ィルタ、１５は受信時に受信信号に対して周波数変換す
る際に用いる信号を発生する局部発振器、１６ａ，１６
ｂは上記第１及び第２のフィルタ１７ａ，１７ｂにそれ
ぞれ対応し受信時に受信信号と局部発振器１５から入力
される信号の差である中間周波数信号を出力する第１及
び第２のミキサ、１８ａ，１８ｂは上記第１及び第２の
ミキサ１６ａ，１６ｂにそれぞれ対応し中間周波数信号
を増幅する第１及び第２の中間周波数増幅器、１９ａ，
１９ｂは上記第１及び第２の中間周波数増幅器１８ａ，
１８ｂにそれぞれ対応し中間周波数信号を検波する第１
及び第２の検波器、２０ａ，２０ｂは上記第１及び第２
の検波器１９ａ，１９ｂにそれぞれ対応し検波後のビデ
オ信号を増幅する第１及び第２のビデオ増幅器、２４は
上記第１及び第２のビデオ増幅器２０ａ，２０ｂの出力
を入力し、第２のフィルタ１７ｂを信号が通過してこな
かった場合は受信波は目標１からの反射波４であるとし
て第１のフィルタ１７ａを通過し、周波数変換された中
間周波数信号をそのまま出力し、反対に第２のフィルタ
１７ｂを信号が通過してきた場合は受信波は妨害波６で
あるとして受信信号を出力しない妨害波判定部、２１は
妨害波判定部２４出力である送信波３に対する目標１か
らの反射波４の受信信号のビデオ信号について信号処理
を行う信号処理部であり、１０は以上から構成されるミ
サイルのレーダー部である。Embodiment 2 FIG. FIG. 5 is a configuration diagram showing a second embodiment of the present invention. In FIG. 5, reference numeral 11 radiates a transmission wave 3 toward a target 1 at the time of transmission, and 11 at the time of reception.
An antenna device for receiving the reflected wave 4 from the target 1 for the, a transmission / reception switch for outputting a transmission signal to the antenna device 11 at the time of transmission and a reception signal from the antenna device 11 for the reception, and a transmission signal for transmission 13 An amplifier which amplifies and outputs to the transmission / reception switcher 12, a modulator 14 which modulates a transmission signal and outputs it to the amplifier 13, a distributor 23 which distributes a reception signal input from the transmission / reception switcher, 17a,
Reference numeral 17b is a filter for inputting the distributed output of the distributor 23, and 17a is a filter for allowing the fundamental wave signal 7 contained in the reflected wave 4 and the interference wave 6 from the target 1 to the transmitted wave 3 to pass. 1 is a filter, 17b is a second filter that allows passage of the second harmonic signal 8 contained in the interfering wave 6, and 15 is a local part that generates a signal used for frequency conversion of the received signal during reception. Oscillator, 16a, 16
b corresponds to the first and second filters 17a and 17b, respectively, and outputs first and second mixers 18a and 18a, which output an intermediate frequency signal which is a difference between a received signal and a signal input from the local oscillator 15 at the time of reception. Reference numeral 18b denotes first and second intermediate frequency amplifiers 19a, which respectively correspond to the first and second mixers 16a, 16b and amplify the intermediate frequency signal.
19b is the first and second intermediate frequency amplifiers 18a,
18b, each of which detects an intermediate frequency signal corresponding to 18b
And second detectors 20a and 20b are the first and second detectors.
The first and second video amplifiers 24 respectively corresponding to the wave detectors 19a and 19b for amplifying the detected video signal, and the input of the outputs of the first and second video amplifiers 20a and 20b, and the second video amplifier 24, respectively. When the signal does not pass through the filter 17b, the received wave is assumed to be the reflected wave 4 from the target 1 and passes through the first filter 17a, and the frequency-converted intermediate frequency signal is output as it is. When the signal has passed through the filter 17b, the received wave is the disturbing wave 6 and the disturbing wave determining unit that does not output the received signal 21 is the reflected wave from the target 1 for the transmitted wave 3 that is the output of the disturbing wave determining unit 24. 4 is a signal processing unit that performs signal processing on the video signal of the received signal, and 10 is a radar unit of the missile configured as described above.

【００１４】上記実施の形態１では周波数変換後の受信
信号の中間周波数信号について第１のフィルタ１７ａに
よって妨害波６の基本波中間周波数信号７ａや反射波中
間周波数信号４ａを、また第２のフィルタ１７ｂによっ
て妨害波６の２倍高調波中間周波数信号８ａを通過さ
せ、次に妨害波判定部２４で第２のフィルタ１７ｂを通
過してきた２倍高調波中間周波数信号８ａを検出したか
否かによって妨害波６か目標１からの反射波４からの区
別をし、妨害波６を受信した時は信号処理部２１へ信号
が送らず、目標１からの反射波４を受信した時は信号処
理部２１へ信号を送ることによって、ミサイルは妨害波
を識別し、目標１からの反射波４のみについて追尾の信
号処理を可能にした。一方、実施の形態２は周波数変換
前の受信信号について第１のフィルタ１７ａによって妨
害波６の基本波信号７や反射波４を通過させ、第２のフ
ィルタ１７ｂによって妨害波６の２倍高調波信号８を通
過させ、それぞれ周波数変換して中間周波数信号にし、
以下同様の手法を用いることによって上記実施の形態１
と同じ動作を期待できる。In the first embodiment, the first filter 17a converts the intermediate frequency signal of the received signal after frequency conversion into the fundamental intermediate frequency signal 7a and the reflected intermediate frequency signal 4a of the interfering wave 6, and the second filter. Depending on whether or not the double harmonic intermediate frequency signal 8a of the disturbing wave 6 is passed by 17b, and then the double harmonic intermediate frequency signal 8a passing through the second filter 17b is detected by the disturbing wave determining unit 24. Distinguishing from the interference wave 6 or the reflected wave 4 from the target 1, the signal is not sent to the signal processing unit 21 when the interference wave 6 is received, and the signal processing unit when the reflected wave 4 from the target 1 is received. By sending a signal to 21, the missile identified the jammer and enabled signal processing for tracking only the reflected wave 4 from target 1. On the other hand, in the second embodiment, with respect to the reception signal before frequency conversion, the first filter 17a allows the fundamental wave signal 7 and the reflected wave 4 of the disturbing wave 6 to pass therethrough, and the second filter 17b causes the double harmonic of the disturbing wave 6 to pass. Pass signal 8 and frequency convert each to an intermediate frequency signal,
Hereinafter, the same method as described above is applied to the first embodiment.
You can expect the same behavior as.

【００１５】[0015]

【発明の効果】この発明によれば、妨害波の基本波や反
射波を通過させる第１のフィルタと妨害波の２倍高調波
信号を通過させる第２のフィルタと第２のフィルタ以降
の信号の有無から妨害波か目標からの反射波かの区別を
し、妨害波の場合は信号処理部への出力をしない妨害波
判定部を設けることにより妨害波を受信した時とミサイ
ルの送信波に対する目標からの反射波を受信したときの
違いを識別する。According to the present invention, the first filter that passes the fundamental wave and the reflected wave of the interfering wave, the second filter that passes the double harmonic wave signal of the interfering wave, and the signal after the second filter. The presence or absence of an interfering wave or a reflected wave from the target is distinguished, and in the case of an interfering wave, by providing an interfering wave determination section that does not output to the signal processing section Identify the differences when receiving the reflected waves from the target.

【図面の簡単な説明】[Brief description of drawings]

【図１】 この発明による妨害波識別装置を含むミサイ
ルのレーダー部の実施の形態１を示す図である。FIG. 1 is a diagram showing a first embodiment of a radar section of a missile including an interference wave identifying device according to the present invention.

【図２】 この発明による妨害波識別装置の実施の形態
１に使用する第１のフィルタと第２のフィルタの周波数
特性を示す図である。FIG. 2 is a diagram showing frequency characteristics of a first filter and a second filter used in the first embodiment of the interference wave identifying device according to the present invention.

【図３】 この発明による妨害波識別装置の実施の形態
１に使用する第１のフィルタと第２のフィルタ通過後の
妨害波の中間周波数信号を示す図である。FIG. 3 is a diagram showing an intermediate frequency signal of an interfering wave after passing through the first filter and the second filter used in the first embodiment of the interfering wave identifying apparatus according to the present invention.

【図４】 この発明による妨害波識別装置の実施の形態
１に使用する第１のフィルタと第２のフィルタ通過後の
ミサイルの送信波に対する目標からの反射波の中間周波
数信号を示す図である。FIG. 4 is a diagram showing an intermediate frequency signal of a reflected wave from a target with respect to a transmitted wave of a missile after passing through a first filter and a second filter used in Embodiment 1 of an interference wave identifying apparatus according to the present invention. .

【図５】 この発明による妨害波識別装置を含むミサイ
ルのレーダー部の実施の形態２を示す図である。FIG. 5 is a diagram showing a second embodiment of a radar section of a missile including an interference wave identifying device according to the present invention.

【図６】 目標とミサイルの関係を示す図である。FIG. 6 is a diagram showing a relationship between a target and a missile.

【図７】 目標とミサイルと妨害装置の関係を示す図で
ある。FIG. 7 is a diagram showing a relationship between a target, a missile, and a jamming device.

【図８】 妨害波に含まれる周波数成分を示す図であ
る。FIG. 8 is a diagram showing frequency components included in an interference wave.

【図９】 ミサイルの送信波に対する目標からの反射波
に含まれる周波数成分を示す図である。FIG. 9 is a diagram showing frequency components included in a reflected wave from a target with respect to a transmitted wave of a missile.

【図１０】 従来のミサイルのレーダー部を示す図であ
る。FIG. 10 is a diagram showing a radar unit of a conventional missile.

【図１１】 従来のミサイルのレーダー部に使用するフ
ィルタの周波数特性を示す図である。FIG. 11 is a diagram showing frequency characteristics of a filter used in a radar section of a conventional missile.

【図１２】 従来のミサイルのレーダー部に使用するフ
ィルタ通過後の妨害波の中間周波数信号を示す図であ
る。FIG. 12 is a diagram showing an intermediate frequency signal of an interfering wave after passing through a filter used in a radar section of a conventional missile.

【図１３】 従来のミサイルのレーダー部に使用するフ
ィルタ通過後のミサイルの送信波に対する目標からの反
射波の中間周波数信号を示す図である。FIG. 13 is a diagram showing an intermediate frequency signal of a reflected wave from a target with respect to a transmitted wave of a missile after passing through a filter used in a radar section of a conventional missile.

【符号の説明】[Explanation of symbols]

１ 目標、２ ミサイル、３ 送信波、４ 反射波、４
ａ 反射波中間周波数信号、５ 妨害装置、６ 妨害
波、７ 基本波信号、７ａ 基本波中間周波数信号、８
２倍高調波信号、８ａ ２倍高調波中間周波数信号、
９ ３倍高調波信号、１０ ミサイルのレーダー部、１
１ アンテナ装置、１２ 送受切換器、１３ 増幅器、
１４ 変調器、１５ 局部発振器、１６ ミキサ、１６
ａ 第１のミキサ、１６ｂ 第２のミキサ、１７ フィ
ルタ、１７ａ 第１のフィルタ、１７ｂ 第２のフィル
タ、１８ 中間周波数増幅器、１８ａ 第１の中間周波
数増幅器、１８ｂ 第２の中間周波数増幅器、１９ 検
波器、１９ａ 第１の検波器、１９ｂ 第２の検波器、
２０ ビデオ増幅器、２０ａ 第１のビデオ増幅器、２
０ｂ 第２のビデオ増幅器、２１ 信号処理部、２２
フィルタの周波数特性、２２ａ 第１フィルタの周波数
特性、２２ｂ 第２のフィルタの周波数特性、２３ 分
配器、２４ 妨害波判定部。1 target, 2 missiles, 3 transmitted waves, 4 reflected waves, 4
a reflected wave intermediate frequency signal, 5 interference device, 6 interference wave, 7 fundamental wave signal, 7a fundamental wave intermediate frequency signal, 8
2nd harmonic signal, 8a 2nd harmonic intermediate frequency signal,
9 3rd harmonic signal, 10 missile radar section, 1
1 antenna device, 12 duplexer, 13 amplifier,
14 modulator, 15 local oscillator, 16 mixer, 16
a first mixer, 16b second mixer, 17 filter, 17a first filter, 17b second filter, 18 intermediate frequency amplifier, 18a first intermediate frequency amplifier, 18b second intermediate frequency amplifier, 19 detection Detector, 19a first detector, 19b second detector,
20 video amplifier, 20a first video amplifier, 2
0b second video amplifier, 21 signal processing unit, 22
Filter frequency characteristics, 22a first filter frequency characteristics, 22b second filter frequency characteristics, 23 distributor, 24 interference wave determination unit.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 送信時には送信波を目標に向けて放射
し、受信時には送信波に対する目標からの反射波を受信
するアンテナ装置と、送信時にはアンテナ装置へ送信信
号を出力し、受信時にはアンテナ装置からの受信信号を
出力する送受切換器と、送信時に送信信号を増幅し送受
切換器へ出力する増幅器と、送信信号に変調をかけて増
幅器へ出力する変調器と、受信時に受信信号に対して周
波数変換する際に用いる信号を発生する局部発振器と、
受信時に送受切換器を介して入力される受信信号と局部
発振器から入力される信号の差である中間周波数信号を
出力するミキサと、ミキサから入力される中間周波数信
号を分配する分配器と、上記分配器の分配出力をそれぞ
れ入力するフィルタであって、送信波に対する目標から
の反射波の中間周波数信号と妨害波の中に含まれる基本
波信号の中間周波数信号を通過可能にする第１のフィル
タと、妨害波の中に含まれる２倍高調波信号の中間周波
数信号を通過可能にする第２のフィルタと、上記第１及
び第２のフィルタにそれぞれ対応し中間周波数信号を増
幅する第１及び第２の中間周波数増幅器と、上記第１及
び第２の中間周波数増幅器にそれぞれ対応し中間周波数
信号を検波する第１及び第２の検波器と、上記第１及び
第２の検波器にそれぞれ対応し検波後のビデオ信号を増
幅する第１及び第２のビデオ増幅器と、上記第１及び第
２のビデオ増幅器の出力を入力し、第２のフィルタを信
号が通過してこなかった場合は受信波は目標からの反射
波であるとして第１のフィルタを通過した中間周波数信
号をそのまま出力し、反対に第２のフィルタを信号が通
過してきた場合は受信波は妨害波であるとして受信信号
を出力しない妨害波判定部と、妨害波判定部出力である
送信波に対する目標からの反射波の受信信号のビデオ信
号について信号処理を行う信号処理部とから構成される
妨害波識別装置。1. An antenna device that radiates a transmission wave toward a target during transmission and receives a reflected wave from the target for the transmission wave during reception, and a transmission signal to the antenna device during transmission, and an antenna device during reception. Of the received signal, an amplifier that amplifies the transmitted signal at the time of transmission and outputs it to the device, a modulator that modulates the transmitted signal and outputs it to the amplifier, and a frequency for the received signal at the time of reception. A local oscillator that generates a signal used for conversion,
A mixer for outputting an intermediate frequency signal which is a difference between a reception signal input via the transmission / reception switch during reception and a signal input from the local oscillator; a distributor for distributing the intermediate frequency signal input from the mixer; A first filter for inputting the distribution output of the distributor, which allows the intermediate frequency signal of the reflected wave from the target for the transmission wave and the intermediate frequency signal of the fundamental wave signal contained in the interfering wave to pass through A second filter that allows passage of the intermediate frequency signal of the double harmonic signal included in the interfering wave; and first and second amplifiers that correspond to the first and second filters and amplify the intermediate frequency signal, respectively. A second intermediate frequency amplifier, first and second detectors for detecting the intermediate frequency signal respectively corresponding to the first and second intermediate frequency amplifiers, and the first and second detectors. When the corresponding first and second video amplifiers for amplifying the detected video signal and the outputs of the first and second video amplifiers are input and the signal does not pass through the second filter Indicates that the received wave is a reflected wave from the target and outputs the intermediate frequency signal that has passed through the first filter as it is. On the contrary, if the signal passes through the second filter, the received wave is received as an interfering wave. An interfering wave identification device comprising an interfering wave determining section that does not output a signal and a signal processing section that performs signal processing on a video signal of a received signal of a reflected wave from a target for a transmitted wave that is the output of the interfering wave determining section. 【請求項２】 送信時には送信波を目標に向けて放射
し、受信時には送信波に対する目標からの反射波を受信
するアンテナ装置と、送信時にはアンテナ装置へ送信信
号を出力し、受信時にはアンテナ装置からの受信信号を
出力する送受切換器と、送信時に送信信号を増幅し送受
切換器へ出力する増幅器と、送信信号に変調をかけて増
幅器へ出力する変調器と、送受切換器から入力される受
信信号を分配する分配器と、上記分配器の分配出力をそ
れぞれ入力するフィルタであって送信波に対する目標か
らの反射波と妨害波の中に含まれる基本波信号を通過可
能にする第１のフィルタと、妨害波の中に含まれる２倍
高調波信号を通過可能にする第２のフィルタと、受信時
に受信信号に対して周波数変換する際に用いる信号を発
生する局部発振器と、上記第１及び第２のフィルタにそ
れぞれ対応し受信時に受信信号と局部発振器から入力さ
れる信号の差である中間周波数信号を出力する第１及び
第２のミキサと、上記第１及び第２のミキサにそれぞれ
対応し中間周波数信号を増幅する第１及び第２の中間周
波数増幅器と、上記第１及び第２の中間周波数増幅器に
それぞれ対応し中間周波数信号を検波する第１及び第２
の検波器と、上記第１及び第２の検波器にそれぞれ対応
し検波後のビデオ信号を増幅する第１及び第２のビデオ
増幅器と、上記第１及び第２のビデオ増幅器の出力を入
力し、第２のフィルタを信号が通過してこなかった場合
は受信波は目標からの反射波であるとして第１のフィル
タを通過し、周波数変換された中間周波数信号をそのま
ま出力し、反対に第２のフィルタを信号が通過してきた
場合は受信波は妨害波であるとして受信信号を出力しな
い妨害波判定部と、妨害波判定部出力である送信波に対
する目標からの反射波の受信信号のビデオ信号について
信号処理を行う信号処理部とから構成される妨害波識別
装置。2. An antenna device that radiates a transmitted wave toward a target during transmission and receives a reflected wave from the target for the transmitted wave during reception, and a transmission signal that is output to the antenna device during transmission, and from the antenna device during reception. Of the received signal from the transmission / reception switch, an amplifier that amplifies the transmission signal during transmission and outputs it to the transmission / reception switch, a modulator that modulates the transmission signal and outputs it to the amplifier, and a reception input from the transmission / reception switch. A distributor for distributing a signal, and a filter for inputting a distribution output of the distributor, the first filter allowing passage of a fundamental wave signal contained in a reflected wave from a target for a transmission wave and an interference wave. A second filter that allows passage of the second harmonic signal contained in the interfering wave, a local oscillator that generates a signal used for frequency conversion of the received signal during reception, First and second mixers respectively corresponding to the first and second filters, which output intermediate frequency signals which are a difference between a received signal and a signal input from the local oscillator during reception, and the first and second mixers. First and second intermediate frequency amplifiers corresponding to the mixers and amplifying the intermediate frequency signals, and first and second intermediate frequency signals corresponding to the first and second intermediate frequency amplifiers and detecting the intermediate frequency signals, respectively.
Of the first and second video amplifiers corresponding to the first and second detectors, respectively, for amplifying the video signal after detection, and the outputs of the first and second video amplifiers. , If the signal does not pass through the second filter, it is assumed that the received wave is a reflected wave from the target and passes through the first filter, and the frequency-converted intermediate frequency signal is output as it is. When the signal has passed through the filter of, the received wave is an interference wave and the received wave is the interference wave determination section that does not output the received signal, and the received wave of the reflected wave from the target for the output wave of the interference wave determination section is the video signal of the received signal. The interference wave identification device including a signal processing unit that performs signal processing on the.