JP2010019678A - Signal processor - Google Patents

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JP2010019678A
JP2010019678A JP2008180280A JP2008180280A JP2010019678A JP 2010019678 A JP2010019678 A JP 2010019678A JP 2008180280 A JP2008180280 A JP 2008180280A JP 2008180280 A JP2008180280 A JP 2008180280A JP 2010019678 A JP2010019678 A JP 2010019678A
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esm
signal
radar
pulse
target
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JP5003619B2 (en
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Hiroyoshi Asami
廣愛 浅見
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Mitsubishi Electric Corp
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/021Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals

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  • Radar, Positioning & Navigation (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To adequately detect a target even under a condition that an invisible region is generated in a pulse received by ESM because reception by the ESM is not performed during radar-transmission in a system that concurrently performs detection and identification of a target by using the radar and the ESM. <P>SOLUTION: A synchronization signal for informing of a clock time of an invisible region by the ESM generated during radar-transmission from a signal synchronization means 13, is generated. An A/D conversion synchronization means 4 for ESM adds a flag indicative of the invisible region to a reception signal from the ESM on the basis of the synchronization signal from the signal synchronization means 13. A signal processing determination means 5 for ESM determines whether or not a pulse is effective on the basis of the flag indicative of the invisible region when a pulse specification is calculated out from the ESM reception signal. A target tracking/identification means 12 performs identification or tracking of the target on the basis of information of the pulse that is determined to be effective. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、レーダとESM(Electronic Support Measures)による目標探知、追尾、識別を同時に行なう信号処理装置に関するものである。   The present invention relates to a signal processing apparatus that simultaneously performs target detection, tracking, and identification by radar and ESM (Electronic Support Measures).

図6は、従来のレーダとESMによる目標探知、追尾、識別を同時に行なう信号処理装置の一例を示す構成図である。図6において、ESM用受信アンテナ102およびレーダ用送受信アンテナ106は、信号処理装置101に接続される。信号処理装置101は、ESM用受信手段103、ESM用A/D変換手段104、ESM用信号処理手段105、レーダ用送信手段107、レーダ用送信制御手段108、レーダ用受信手段109、レーダ用A/D変換手段110、レーダ用信号処理手段111、および目標追尾識別手段112を備えている。   FIG. 6 is a block diagram showing an example of a signal processing apparatus that simultaneously performs target detection, tracking, and identification using a conventional radar and ESM. In FIG. 6, an ESM reception antenna 102 and a radar transmission / reception antenna 106 are connected to a signal processing apparatus 101. The signal processing apparatus 101 includes an ESM receiving unit 103, an ESM A / D conversion unit 104, an ESM signal processing unit 105, a radar transmitting unit 107, a radar transmission control unit 108, a radar receiving unit 109, and a radar A. / D conversion means 110, radar signal processing means 111, and target tracking identification means 112 are provided.

ESM用受信手段103は、目標追尾識別手段112からの指示に基づいて、ESM用受信アンテナ102の方位、受信する周波数帯等を決め、ESM用受信アンテナ102を制御する。ESM用受信アンテナ102で受信された外部からの受信信号は、ESM用受信手段103で増幅、位相検波された後、ESM用A/D変換手段104でディジタルビデオ信号に変換され、ESM用信号処理手段105に送られる。受信信号に周期的なパルス信号があった場合には、ESM用信号処理手段105は、各パルス信号の周波数、振幅、到来時刻等の諸元を算出し、算出結果を目標追尾識別手段112に送る。   Based on the instruction from the target tracking identification unit 112, the ESM receiving unit 103 determines the orientation of the ESM receiving antenna 102, the frequency band to be received, and the like, and controls the ESM receiving antenna 102. The externally received signal received by the ESM receiving antenna 102 is amplified and phase-detected by the ESM receiving means 103, and then converted into a digital video signal by the ESM A / D conversion means 104. Sent to means 105. When there is a periodic pulse signal in the received signal, the ESM signal processing means 105 calculates specifications such as the frequency, amplitude, and arrival time of each pulse signal, and the calculation result is sent to the target tracking identification means 112. send.

また、レーダ用送信制御手段108は、目標追尾識別手段112からの指示に基づいて、レーダで目標探索・追尾を行なうレーダ送信波の周波数帯、パルス間隔、パルス幅等の諸元を決め、レーダ送信手段107に諸元データを送る。レーダ用送信手段107は、諸元データに基づいて送信パルス信号を発生させ、送信パルス信号はレーダ用送受信アンテナ106から外部に放出される。送信パルス信号は、目標等に到達した後反射し、反射された信号がレーダ用送受信アンテナ106で受信される。   Further, the radar transmission control means 108 determines specifications such as a frequency band, a pulse interval, and a pulse width of a radar transmission wave to be searched and tracked by the radar based on an instruction from the target tracking identification means 112. The specification data is sent to the transmission means 107. The radar transmission means 107 generates a transmission pulse signal based on the specification data, and the transmission pulse signal is emitted from the radar transmission / reception antenna 106 to the outside. The transmission pulse signal is reflected after reaching the target or the like, and the reflected signal is received by the radar transmitting / receiving antenna 106.

レーダ用送受信アンテナ106で受信された受信信号(反射波)は、レーダ用受信手段109で増幅、位相検波された後、レーダ用A/D変換手段110でディジタルビデオ信号に変換され、レーダ用信号処理手段111に送られる。レーダ用信号処理手段111は、受信信号の中の反射されたパルス信号の周波数、振幅、到来時刻等の諸元を算出し、算出結果を目標追尾識別手段112に送る。   The received signal (reflected wave) received by the radar transmitting / receiving antenna 106 is amplified and phase-detected by the radar receiving means 109, and then converted into a digital video signal by the radar A / D conversion means 110. It is sent to the processing means 111. The radar signal processing unit 111 calculates specifications such as the frequency, amplitude, and arrival time of the reflected pulse signal in the received signal, and sends the calculation result to the target tracking identification unit 112.

目標追尾識別手段112は、ESM用信号処理手段105とレーダ用信号処理手段111から送られてきた各受信パルスの諸元から、クラッタ等を除去し目標を探知する。また、ESMからのパルス諸元から目標の識別を行なう。さらに、パルス諸元を時系列に処理することで目標の追尾を行い、ESM用受信アンテナ102とレーダ用送受信アンテナ106を向ける方位とレーダ送信波の諸元を定め、必要な情報をESM用受信手段103とレーダ用送信手段107に送る。   The target tracking identification unit 112 detects a target by removing clutter from the specifications of each received pulse sent from the ESM signal processing unit 105 and the radar signal processing unit 111. Also, the target is identified from the pulse specifications from the ESM. Furthermore, target tracking is performed by processing the pulse specifications in time series, the direction in which the ESM reception antenna 102 and the radar transmission / reception antenna 106 are directed and the specifications of the radar transmission wave are determined, and necessary information is received for ESM reception. The data is sent to the means 103 and the radar transmission means 107.

なお、従来のESMおよびレーダを搭載した信号処理装置に関連する従来例として、特許文献1に、レーダ信号処理装置と、ESM信号処理装置を併用したシステムが示されている。また、特許文献2には、アクティブフェーズドアレーアンテナの開口面をn個に分割して、n個の機能(レーダ、電波妨害、ESM等)を割り付けるシステムが示されている。   As a conventional example related to a signal processing apparatus equipped with a conventional ESM and radar, Patent Document 1 discloses a system using both a radar signal processing apparatus and an ESM signal processing apparatus. Patent Document 2 discloses a system in which an active phased array antenna is divided into n openings and assigned n functions (radar, radio interference, ESM, etc.).

特開2001-264420公報JP 2001-264420 A 特開2001-7640公報JP2001-7640

レーダと、ESMによる目標探知・識別を同時に行なうシステムにおいて、レーダ送信中は、レーダアンテナからESMアンテナへの漏れ込みや回り込みが発生する。航空機や飛しょう体等に搭載するESM装置は遠方の目標が送信する微弱なレーダパルス波の受信を目的としていることが多く、レーダアンテナとESMアンテナ間の距離が近いため、自身の送信するレーダ信号の漏れ込みや回り込みの電力の方が目標からの受信電力に比べて極端に大きくなる。このため、ESM側の受信装置が破損する恐れもあり、レーダ送信中はESM側の受信手段を停止する。例えば、従来の信号処理装置101では、レーダ用送信手段107は、自身のレーダ送信時に、レーダ送信中を示す信号をESM用受信手段103に送り、ESM用受信手段103での受信動作を停止させる。   In a system that simultaneously detects and identifies a target using radar and ESM, leakage or wraparound from the radar antenna to the ESM antenna occurs during radar transmission. ESM devices mounted on aircraft, flying objects, etc. are often intended to receive weak radar pulse waves transmitted by distant targets, and since the distance between the radar antenna and the ESM antenna is short, the radar transmitted by itself The signal leakage and sneak power becomes extremely larger than the received power from the target. For this reason, there is a possibility that the receiving device on the ESM side is damaged, and the receiving means on the ESM side is stopped during the radar transmission. For example, in the conventional signal processing apparatus 101, the radar transmission unit 107 sends a signal indicating that the radar is being transmitted to the ESM reception unit 103 during its own radar transmission, and stops the reception operation of the ESM reception unit 103. .

上記のように、レーダ送信中は、ESM用アンテナによる目標パルスの受信ができないため、ESMにて受信したパルスに不可視領域が生じる。図7は自身のレーダ送信信号によりESM受信信号に不可視領域(ブラインド)が生じた状態を説明するための図である。図7の(a)は自身のレーダが送信する送信パルス、(b)は目標が送信したパルス波をディジタル化して表現したものである。実際には複素数の多bitの信号となるが、ここでは簡略化のためパルスの振幅値を1bitで表現し、信号が高い状態(1の状態)をパルスあり、信号が低い状態(0の状態)を信号なし(白色雑音のみ受信)とする。また、図7の(c)も(b)と同様であるが、この図では(a)の送信パルスを重ねている。   As described above, since the target pulse cannot be received by the ESM antenna during radar transmission, an invisible region is generated in the pulse received by the ESM. FIG. 7 is a diagram for explaining a state in which an invisible region (blind) has occurred in the ESM reception signal due to its own radar transmission signal. 7A shows a transmission pulse transmitted by its own radar, and FIG. 7B shows a digital representation of a pulse wave transmitted by the target. Actually, it is a complex multi-bit signal, but here, for simplicity, the amplitude value of the pulse is expressed by 1 bit, the signal is high (1 state) and the signal is low (0 state) ) Is no signal (only white noise is received). Further, (c) of FIG. 7 is similar to (b), but in this figure, the transmission pulses of (a) are overlapped.

レーダ送信中で無ければ、ESMアンテナでは(b)のようなパルスが受信され、各パルスの到来時刻(TOA: Time of Arrival)は、TOA31,TOA32,TOA33、パルス幅はPW31,PW32,PW33と検知され、パルス間隔(PRI: Pulse Repetitional Interval)はTOAからτ31,τ32と算出される。しかし、レーダ送信中では不可視領域が生じるため、(c)のように、各パルスは欠落ないし分断されて、TOAは、TOA41,TOA42,TOA43,TOA44、パルス幅はPW41,PW42,PW43,PW44となり、PRIは、τ41,τ42,τ43と算出される。   If radar transmission is not in progress, the ESM antenna receives a pulse as shown in (b). The arrival time (TOA: Time of Arrival) of each pulse is TOA31, TOA32, TOA33, and the pulse width is PW31, PW32, PW33. The detected pulse interval (PRI: Pulse Repetitional Interval) is calculated from TOA as τ31, τ32. However, since an invisible region is generated during radar transmission, each pulse is missing or divided as shown in (c), and TOA is TOA41, TOA42, TOA43, TOA44, and the pulse width is PW41, PW42, PW43, PW44. , PRI is calculated as τ41, τ42, τ43.

受信信号がクラッタか、同一の目標から発信されたものか判定する際に、同一のパルス幅を複数回受信してから同一のパルス間隔を複数回受信する等の手順をとる。このため、上記の(c)のようなパルスが検知された場合、パルス幅、PRI共にまちまちであり、クラッタと認識されてしまうという問題があった。   When determining whether a received signal is a clutter or a signal transmitted from the same target, a procedure is taken such as receiving the same pulse width a plurality of times and then receiving the same pulse interval a plurality of times. For this reason, when a pulse like the above (c) is detected, both the pulse width and the PRI are different, and there is a problem that it is recognized as clutter.

上記のような場合、自身のレーダ送信時間、間隔は目標との相対距離等により変化し、ESMが受信する目標からのパルス信号も常に変化するため、受信したパルスが不可視領域により形成されたものか、また、不可視領域でどのようなパルスが受信されたかを単純には推定できない。このため、ESM受信信号から目標の諸元(パルス幅、パルス間隔等)を正確に復元することは出来ない。   In the above case, its own radar transmission time and interval change depending on the relative distance from the target, etc., and the pulse signal from the target received by the ESM always changes, so that the received pulse is formed by an invisible region. It is not possible to simply estimate what pulses are received in the invisible region. For this reason, target specifications (pulse width, pulse interval, etc.) cannot be accurately restored from the ESM received signal.

この発明は、かかる問題点を解決するためになされたものであり、レーダと、ESMによる目標探知、識別を同時に行なうシステムにおいて、ESM受信信号に自身のレーダ送信信号による不可視領域が生じた場合であっても、目標を正しく探知することを目的とする。   The present invention has been made to solve such a problem. In a system that simultaneously detects and identifies a target by radar and ESM, an invisible region is generated in the ESM received signal due to its own radar transmission signal. Even if it exists, it aims at detecting a target correctly.

この発明によれば、レーダとESM(Electronic Support Measures)による目標探知および識別を同時に行なうシステムにおいて、自身のレーダ送信時に発生する前記ESMの受信不可視領域の時刻を知らせる信号同期手段と、前記信号同期手段からの同期信号に基づいて前記ESMからの受信信号に不可視領域を示すフラグを付加するESM用A/D変換同期手段と、前記ESM用A/D変換同期手段が付加した不可視領域を示すフラグに基づいて、前記ESMからの受信信号から得られるパルスが有効か否かを判定し、判定結果に基づいてパルスの諸元情報を出力するESM用信号処理判定手段と、前記ESM用信号処理判定手段が出力したパルスの諸元情報に基づいて、目標識別および目標追尾を行なう目標追尾識別手段と、を備えたものである。   According to the present invention, in a system for simultaneously detecting and identifying a target by radar and ESM (Electronic Support Measures), the signal synchronization means for notifying the time of the reception invisible region of the ESM generated when the radar is transmitted, and the signal synchronization A flag for indicating the invisible area added by the ASM / AD conversion synchronizing means for ESM, and an ESM A / D conversion synchronizing means for adding a flag indicating the invisible area to the received signal from the ESM based on the synchronizing signal from the means ESM signal processing determination means for determining whether or not a pulse obtained from the received signal from the ESM is valid, and outputting pulse specification information based on the determination result, and the ESM signal processing determination And target tracking identification means for performing target identification and target tracking based on the specification information of the pulses output by the means.

この発明によれば、自身のレーダ送信を示す同期信号を発生し、この同期信号によりレーダ送信中に生じるESM受信信号の不可視領域を識別して、無効なパルスを除くことができるため、誤ったパルス諸元を利用して目標の識別等をすることが無くなり、適切な信号のみで目標の識別、追尾処理を行うことができるという効果が得られる。   According to the present invention, since a synchronization signal indicating its own radar transmission is generated, an invisible region of the ESM reception signal generated during radar transmission can be identified by this synchronization signal, and invalid pulses can be removed. There is no need to identify the target using the pulse specifications, and the target can be identified and tracked only with an appropriate signal.

実施の形態1.
この発明に係る実施の形態1について、図を用いて説明する。
図1は、実施の形態1による信号処理装置1の構成を説明するブロック図である。図1において、信号処理装置1は、ESM用受信アンテナ2およびレーダ用送受信アンテナ6が接続されて、レーダとESMの信号処理を行なう。ESM用受信アンテナ2は目標からの信号を受信する。ESM用受信手段3はESM用受信アンテナ2で受信した信号について増幅、位相検波等の信号処理を行なう。ESM用A/D変換同期手段4はESM用受信手段3の出力するアナログ信号をディジタル信号に変換する。ESM用信号処理判定手段5はESM用A/D変換同期手段4の出力結果から目標の諸元情報を算出する。レーダ用送受信アンテナ6はレーダ送信波を送信し目標からの反射波を受信する。レーダ用送信手段7は送信パルス信号の諸元データS1に基づいてレーダ用送受信アンテナ6が送信する送信パルス信号を発生し、高出力信号に増幅する。レーダ用送信制御手段8は目標追尾識別手段12からの指示情報S2に基づいて、レーダ用送信手段7が発生する送信パルス信号の諸元を決め、レーダ用送信手段7に送信パルス信号の諸元データS1を送信する。また、レーダ用送信制御手段8は同期信号を生成するためのレーダ送信開始時刻の情報S3を信号同期手段13に送信する。レーダ用受信手段9はレーダ用送受信アンテナ6で受信した目標からの反射波を増幅・位相検波等する。レーダ用A/D変換手段10はレーダ用受信手段9の出力するアナログ信号をディジタル信号に変換する。レーダ用信号処理手段11はレーダ用A/D変換手段10の出力結果から受信信号の諸元情報を算出する。目標追尾識別手段12はESM用信号処理判定手段5からの目標の諸元情報と、レーダ用信号処理手段11の受信信号の諸元情報とから、目標を識別し追尾する。また、目標追尾識別手段12はESM用受信手段3に対しESM用受信アンテナ2の方位、受信する周波数帯等の指示情報S4を送り、レーダ用送信制御手段8に対しレーダを照射する方位・距離等の指示情報S2を送る。信号同期手段13はレーダ送信時に発生するESMでの不可視領域との同期信号を生成し、生成した同期信号をESM用A/D変換同期手段4に送る。
Embodiment 1 FIG.
Embodiment 1 according to the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating a configuration of a signal processing device 1 according to the first embodiment. In FIG. 1, a signal processing apparatus 1 is connected to an ESM reception antenna 2 and a radar transmission / reception antenna 6 to perform signal processing of radar and ESM. The ESM receiving antenna 2 receives a signal from the target. The ESM receiving means 3 performs signal processing such as amplification and phase detection on the signal received by the ESM receiving antenna 2. The ESM A / D conversion synchronizing means 4 converts the analog signal output from the ESM receiving means 3 into a digital signal. The ESM signal processing determination means 5 calculates target specification information from the output result of the ESM A / D conversion synchronization means 4. The radar transmitting / receiving antenna 6 transmits a radar transmission wave and receives a reflected wave from a target. The radar transmission means 7 generates a transmission pulse signal transmitted from the radar transmission / reception antenna 6 based on the specification data S1 of the transmission pulse signal, and amplifies it to a high output signal. The radar transmission control means 8 determines the specifications of the transmission pulse signal generated by the radar transmission means 7 based on the instruction information S2 from the target tracking identification means 12, and sends the specifications of the transmission pulse signal to the radar transmission means 7. Data S1 is transmitted. Further, the radar transmission control means 8 transmits radar transmission start time information S3 for generating a synchronization signal to the signal synchronization means 13. The radar receiving means 9 amplifies / phase-detects the reflected wave from the target received by the radar transmitting / receiving antenna 6. The radar A / D converter 10 converts the analog signal output from the radar receiver 9 into a digital signal. The radar signal processing means 11 calculates the specification information of the received signal from the output result of the radar A / D conversion means 10. The target tracking identification unit 12 identifies and tracks the target from the target specification information from the ESM signal processing determination unit 5 and the received signal specification information of the radar signal processing unit 11. Further, the target tracking identification unit 12 sends instruction information S4 such as the direction of the ESM receiving antenna 2 and the frequency band to be received to the ESM receiving unit 3, and irradiates the radar to the radar transmission control unit 8. The instruction information S2 is sent. The signal synchronization means 13 generates a synchronization signal with the invisible region in the ESM generated at the time of radar transmission, and sends the generated synchronization signal to the ESM A / D conversion synchronization means 4.

図1のESM用受信アンテナ2とレーダ用送受信アンテナ6には、アレイ状に並べられた放射素子の給電位相を電気的に制御するか又は放射素子を電気的に選択することにより所望の方向に所望のタイミングで送受信ビームを形成することが可能なフェーズドアレイアンテナ等を用いることができる。   In the ESM reception antenna 2 and the radar transmission / reception antenna 6 in FIG. 1, the feeding phase of the radiating elements arranged in an array is electrically controlled, or the radiating elements are electrically selected, so that they are in a desired direction. A phased array antenna or the like that can form a transmission / reception beam at a desired timing can be used.

次に、動作について説明する。
図1において、レーダ用送信制御手段8は、目標追尾識別手段12からの指示情報S2に基づいて、レーダで目標探索・追尾を行なうレーダ送信波の周波数帯、パルス間隔、パルス幅等の諸元を決め、レーダ用送信手段7に諸元データS1を送る。レーダ用送信手段7は、この諸元データS1に基づいて送信パルス信号を発生し、発生した送信パルス信号がレーダ用送受信アンテナ6から外部に放出される。外部に放出された送信パルス信号は、目標等に到達した後反射し、反射された信号がレーダ用送受信アンテナ6で受信される。
Next, the operation will be described.
In FIG. 1, the radar transmission control means 8 is based on the instruction information S2 from the target tracking identification means 12 and specifications such as the frequency band, pulse interval, pulse width, etc. of the radar transmission wave to be searched and tracked by the radar. The specification data S1 is sent to the radar transmission means 7. The radar transmission means 7 generates a transmission pulse signal based on the specification data S1, and the generated transmission pulse signal is emitted from the radar transmission / reception antenna 6 to the outside. The transmission pulse signal emitted to the outside is reflected after reaching the target or the like, and the reflected signal is received by the radar transmitting / receiving antenna 6.

レーダ用送受信アンテナ6で受信された受信信号(目標からの反射波)は、レーダ用受信手段9で増幅、位相検波された後、レーダ用A/D変換手段10でアナログ信号からディジタルビデオ信号に変換され、レーダ用信号処理手段11に送られる。レーダ用信号処理手段11は、受信信号の中の反射されたパルス信号の周波数、振幅、到来時刻等の諸元を算出し、算出結果を目標追尾識別手段12に送る。目標追尾識別手段12は、得られた諸元情報から目標までの距離と目標との相対速度を算出し、目標の移動先を予測して追尾を行い、次のレーダを照射する方位・距離等を定めレーダ用送信制御手段8に指示情報S2を送信する。レーダでの目標探索・追尾ではこれらの処理を繰り返す。   The received signal (the reflected wave from the target) received by the radar transmitting / receiving antenna 6 is amplified and phase-detected by the radar receiving means 9 and then converted from an analog signal to a digital video signal by the radar A / D conversion means 10. The signal is converted and sent to the radar signal processing means 11. The radar signal processing unit 11 calculates specifications such as the frequency, amplitude, and arrival time of the reflected pulse signal in the received signal, and sends the calculation result to the target tracking identification unit 12. The target tracking identification unit 12 calculates the relative speed between the target distance and the target from the obtained specification information, predicts the target movement destination, performs tracking, and azimuth / distance for irradiating the next radar, etc. The instruction information S2 is transmitted to the radar transmission control means 8. These processes are repeated for target search and tracking by the radar.

前記のレーダ送信の動作とは独立して、ESM用受信手段3は、目標追尾識別手段12からの指示情報S4に基づいて、ESM用受信アンテナ2の方位、受信する周波数帯等を決め、ESM用受信アンテナ2を制御する。ESM用受信アンテナ2で受信された外部からの受信信号は、ESM用受信手段3で増幅、位相検波された後、ESM用A/D変換同期手段4でディジタルビデオ信号に変換され、ESM用信号処理判定手段5に送られる。受信信号に周期的なパルス信号等があった場合には、ESM用信号処理判定手段5は、各パルス信号の周波数、振幅、到来時刻、パルス幅等の諸元情報を算出し、算出結果を目標追尾識別手段12に送る。目標追尾識別手段12は、これらの諸元情報からESM用受信手段3に探索する方位・周波数帯などを指示するための指示情報S4を送信する。また、目標が探知された場合は、レーダでの探索に切り替える等の判断をする。   Independently of the radar transmission operation, the ESM receiving means 3 determines the azimuth of the ESM receiving antenna 2, the frequency band to be received, etc. based on the instruction information S 4 from the target tracking identifying means 12. The receiving antenna 2 is controlled. The externally received signal received by the ESM receiving antenna 2 is amplified and phase-detected by the ESM receiving means 3 and then converted into a digital video signal by the ESM A / D conversion synchronizing means 4 to obtain an ESM signal. It is sent to the process determination means 5. When there is a periodic pulse signal or the like in the received signal, the ESM signal processing determination means 5 calculates specification information such as the frequency, amplitude, arrival time, and pulse width of each pulse signal, and the calculation result is This is sent to the target tracking identification means 12. The target tracking identification unit 12 transmits instruction information S4 for instructing the ESM receiving unit 3 to search for the azimuth / frequency band and the like from these specification information. Further, when the target is detected, it is determined to switch to the search by the radar.

また、レーダ用送信手段7は、自身のレーダ送信時に、レーダ送信中を示す信号S5をESM用受信手段3に送り、ESM用受信手段3での受信動作を停止させる。ESM用受信手段3の受信動作停止中は、ESM用受信手段3からESM用A/D変換同期手段4に白色雑音レベルの信号が送信される。さらに、レーダ送信時に、レーダ用送信制御手段8は、レーダ送信開始時刻の情報S3を信号同期手段13に送る。信号同期手段13は、ESM用A/D変換同期手段4にレーダ送信中を示す同期信号を送る。この際、レーダ用送信制御手段8からレーダ用送信手段7への転送遅延、ESM用受信手段3からESM用A/D変換同期手段4への転送遅延等を考慮して、信号同期手段13からESM用A/D変換同期手段4への同期信号の到着が、ESM用受信手段3からESM用A/D変換同期手段4への受信動作停止中の雑音レベルの信号の到着と同時になるようにする。   Further, the radar transmission means 7 sends a signal S5 indicating that the radar is being transmitted to the ESM reception means 3 at the time of its own radar transmission, and stops the reception operation in the ESM reception means 3. While the reception operation of the ESM reception unit 3 is stopped, a signal of a white noise level is transmitted from the ESM reception unit 3 to the ESM A / D conversion synchronization unit 4. Further, at the time of radar transmission, the radar transmission control means 8 sends radar transmission start time information S3 to the signal synchronization means 13. The signal synchronization means 13 sends a synchronization signal indicating that radar transmission is in progress to the A / D conversion synchronization means 4 for ESM. At this time, in consideration of the transfer delay from the radar transmission control means 8 to the radar transmission means 7 and the transfer delay from the ESM reception means 3 to the ESM A / D conversion synchronization means 4, the signal synchronization means 13 The arrival of the synchronization signal to the ESM A / D conversion synchronization means 4 is made simultaneously with the arrival of the signal of the noise level during the reception operation stoppage from the ESM reception means 3 to the ESM A / D conversion synchronization means 4. To do.

ESM用A/D変換同期手段4は信号同期手段13からレーダ送信中を示す同期信号が来た際に、A/D変換されたディジタルビデオ信号にレーダ送信中に受信された信号であることを示すブラインドフラグをつけて、ESM用信号処理判定手段5にディジタルビデオ信号を送る。ESM用信号処理判定手段5は、ディジタルビデオ信号からパルス幅、到来時刻を算出する際に、ブラインドフラグの付いた領域にかかるようなパルスがある場合、そのパルスのパルス幅と到来時刻は、目標の探知等には利用できない無効な情報と判断して、目標追尾識別手段12にブラインド状態の情報を付加してパルス幅、TOA等の情報を送る。   The ESM A / D conversion synchronization means 4 is a signal received during radar transmission to the A / D converted digital video signal when a synchronization signal indicating that the radar transmission is in progress is received from the signal synchronization means 13. A digital video signal is sent to the ESM signal processing determination means 5 with a blind flag shown. When the ESM signal processing determination means 5 calculates the pulse width and arrival time from the digital video signal, if there is such a pulse in the area with the blind flag, the pulse width and arrival time of the pulse are It is determined that the information is invalid information that cannot be used for detection, and information on the blind state is added to the target tracking identification unit 12 and information such as pulse width and TOA is transmitted.

目標追尾識別手段12は、ブラインド状態の目標は識別・追尾等には利用しないようにする。また、ブラインド状態の探知情報しかない場合等で追尾に利用できる情報が少ない場合は、同一方向、同一周波数帯の探知を再度行なう等の判断をし、ESM用受信手段3等に制御情報を送る。   The target tracking identification unit 12 does not use the blind target for identification / tracking. Further, when there is only blind detection information or the like and there is little information that can be used for tracking, it is determined that detection in the same direction and the same frequency band is performed again, and control information is sent to the ESM receiving means 3 and the like. .

次に、レーダ送信中のESM用A/D変換同期手段4とESM用信号処理判定手段5での細部の動作について、図2、図3を用いて説明する。図2は自身のレーダ送信信号と、レーダ送信信号によりESM受信信号に不可視領域(ブラインド)が生じた状態を説明するための図である。図3は、実施の形態1におけるESM用信号処理判定手段でのパルスの検知結果を示す図である。ここで、図2の(a)は、自身のレーダが送信する送信パルス、図2の(b)は目標が送信したパルス波をディジタル化して表現したものである。図2の(c)は自身のレーダ送信による不可視領域が入り、ESM用A/D変換同期手段4に送られる信号を示す。図2の(d)は信号同期手段13からESM用A/D変換同期手段4に送られる、レーダ送信中を示す同期信号を示すものである。なお、図2(b)、(c)において、実際には複素数の多bitの信号となるが、ここでは簡略化のためパルスの振幅値を1bitで表現し、信号が高い状態(1の状態)をパルスあり、信号が低い状態(0の状態)を信号なし(白色雑音のみ受信)とする。   Next, detailed operations of the ESM A / D conversion synchronization means 4 and the ESM signal processing determination means 5 during radar transmission will be described with reference to FIGS. FIG. 2 is a diagram for explaining a state where an invisible region (blind) is generated in the ESM reception signal due to the radar transmission signal and the radar transmission signal. FIG. 3 is a diagram showing a pulse detection result by the ESM signal processing determination unit according to the first embodiment. Here, FIG. 2A shows a transmission pulse transmitted by its own radar, and FIG. 2B shows a digital representation of a pulse wave transmitted by the target. FIG. 2 (c) shows a signal sent to the ESM A / D conversion synchronization means 4 when an invisible region by its own radar transmission enters. FIG. 2 (d) shows a synchronization signal sent from the signal synchronization means 13 to the ESM A / D conversion synchronization means 4 indicating that the radar is being transmitted. In FIGS. 2B and 2C, a complex multi-bit signal is actually used. However, for simplification, the amplitude value of the pulse is expressed by 1 bit, and the signal is in a high state (state 1). ) Is a pulse, and a low signal state (0 state) is no signal (only white noise is received).

レーダ送信中の場合、ESM用アンテナ2では図2の(b)のようなパルスが受信されるが、ESM用受信手段3で増幅・位相検波する際に、レーダ送信による不可視領域が入り、ESM用A/D変換同期手段4に信号が送られる際には図2の(c)のような信号となる。また、信号同期手段13からESM用A/D変換同期手段4に、図2の(d)のような、レーダ送信中を示す同期信号が送られる。なお、実際には、図2の(b)と(c)の間には、ESM用受信手段3からESM用A/D変換同期手段4に送信される際の時間遅延が生じ、(a)と(d)にも信号同期手段13で同期をとる分の時間差が生じるが、ここでは説明を容易にするため省略する。   When radar transmission is in progress, the ESM antenna 2 receives a pulse as shown in FIG. 2B, but when the ESM reception means 3 performs amplification and phase detection, an invisible region due to radar transmission enters, and ESM When a signal is sent to the A / D conversion synchronization means 4, the signal is as shown in FIG. Further, a synchronization signal indicating that the radar is being transmitted as shown in FIG. 2D is sent from the signal synchronization means 13 to the ESM A / D conversion synchronization means 4. In practice, there is a time delay between (b) and (c) in FIG. 2 when transmitting from the ESM receiving means 3 to the ESM A / D conversion synchronizing means 4. There is also a time difference in synchronization with the signal synchronizer 13 in (d) and (d).

ESM用A/D変換同期手段4では、図2の(c)の信号をディジタル化する際に、(d)の同期信号をブラインドフラグとして追加してESM用信号処理判定手段5に送る。実際には、多bitのディジタルデータに、ブラインドフラグを1bit追加する等の処理を行なう。   When the ESM A / D conversion synchronization means 4 digitizes the signal (c) in FIG. 2, the synchronization signal (d) is added as a blind flag and sent to the ESM signal processing determination means 5. In practice, processing such as adding a 1-bit blind flag to multi-bit digital data is performed.

ESM用信号処理判定手段5では、ESM用A/D変換同期手段4から送られてきた信号からパルスを検知して、図3のようなパルス幅とTOA等の諸元を算出するとともに、ブラインドフラグを復元する。この際に、各パルスの先頭、もしくはパルスの末尾にブラインドフラグがかかるようなパルスは、ブラインドを示す状態を付加する。図2の(c)のパルスの例では、2番目と3番目のパルスの末尾、4番目と5番目のパルスの先頭にブラインドフラグがかかるため、2〜5番目のパルスがブラインド状態として出力される。   The ESM signal processing determination means 5 detects a pulse from the signal sent from the ESM A / D conversion synchronization means 4 and calculates specifications such as the pulse width and TOA as shown in FIG. Restore the flag. At this time, a pulse indicating a blind flag is added to a pulse with a blind flag at the beginning of each pulse or at the end of the pulse. In the example of the pulse shown in Fig. 2 (c), the blind flags are placed at the end of the second and third pulses and at the beginning of the fourth and fifth pulses, so the second to fifth pulses are output as blind states. The

目標追尾識別手段12では、ESM用信号処理判定手段5から送られてきた図3の結果から目標の識別等の処理を行なう。図3の場合、2〜5番目のパルスがブラインド状態のため、目標の識別等には利用しないようにする。また、PRIの算出は2つのパルスのTOAの差をとるため、図3の1番目と2番目のパルス間のPRI、5番目と6番目のパルス間のPRIも、ブラインド状態と判断されて、目標の識別等には利用されない。この後、目標追尾識別手段12でブラインド状態ではないパルスのみを利用して識別等を行なう。また、ブラインド状態のパルスしかない場合は、それらのパルス幅等を利用して単なる誤警報か識別不能か等の判断を行い、これらのパルスが識別不能のパルスと判定されて場合には再度同じ領域を探知し、全てノイズ等による誤検知と判断された場合には次の領域への探知に移行する。   The target tracking identification unit 12 performs processing such as target identification based on the result of FIG. 3 sent from the ESM signal processing determination unit 5. In the case of FIG. 3, since the second to fifth pulses are in a blind state, they are not used for target identification or the like. Also, since the PRI calculation takes the difference between the TOA of the two pulses, the PRI between the first and second pulses and the PRI between the fifth and sixth pulses in FIG. It is not used for target identification. Thereafter, the target tracking identification means 12 performs identification or the like using only pulses that are not in the blind state. Also, if there are only blind pulses, it is determined whether they are merely false alarms or cannot be identified using their pulse widths, etc., and if these pulses are determined to be unidentifiable pulses, the same is repeated again. The area is detected, and when it is determined that all of the detection errors are due to noise or the like, the process proceeds to detection of the next area.

以上のように、本実施の形態1によれば、レーダとESM(Electronic Support Measures)による目標探知および識別を同時に行なうシステムにおいて、自身のレーダ送信時に発生する前記ESMの受信不可視領域の時刻を知らせる信号同期手段と、前記信号同期手段からの同期信号に基づいて前記ESMからの受信信号に不可視領域を示すフラグを付加するESM用A/D変換同期手段と、前記ESM用A/D変換同期手段が付加した不可視領域を示すフラグに基づいて、前記ESMからの受信信号から得られるパルスが有効か否かを判定し、判定結果に基づいてパルスの諸元情報を出力するESM用信号処理判定手段と、前記ESM用信号処理判定手段が出力したパルスの諸元情報に基づいて、目標識別および目標追尾を行なう目標追尾識別手段と、を備えることを特徴とする。   As described above, according to the first embodiment, in the system that simultaneously performs target detection and identification by radar and ESM (Electronic Support Measures), the time of the reception invisible region of the ESM generated at the time of its own radar transmission is notified. ESM A / D conversion synchronization means for adding a flag indicating an invisible area to the received signal from the ESM based on the synchronization signal from the signal synchronization means, and the ESM A / D conversion synchronization means ESM signal processing determination means for determining whether or not the pulse obtained from the received signal from the ESM is valid based on the flag indicating the invisible region added by the ESM and outputting the specification information of the pulse based on the determination result And target tracking identification means for performing target identification and target tracking based on the pulse specification information output by the ESM signal processing determination means; Characterized in that it comprises a.

この構成により、レーダ送信を示す同期信号に基づいて、レーダ送信中に生じるESM受信信号の不可視領域を正しく識別し、無効なパルスを除くことができるため、誤ったパルス諸元を利用して目標の識別等をすることが無くなり、適切な信号のみで目標の識別、追尾等の処理ができるという効果が得られる。これにより、誤警報を削減することができ、レーダ・ESMシステムの探知性能向上という効果が得られる。また、不要な処理を減らせるため、識別・追尾処理装置の演算を削減でき、装置の軽量化できるという効果が得られる。   With this configuration, the invisible region of the ESM reception signal generated during radar transmission can be correctly identified and invalid pulses can be removed based on the synchronization signal indicating radar transmission. Thus, it is possible to obtain an effect that the target identification, tracking, and the like can be performed with only an appropriate signal. Thereby, false alarms can be reduced, and the effect of improving the detection performance of the radar / ESM system can be obtained. In addition, since unnecessary processing can be reduced, the calculation of the identification / tracking processing device can be reduced, and the effect of reducing the weight of the device can be obtained.

実施の形態2.
図1、図3〜図5を用いて、実施の形態2について説明する。図4は、実施の形態2におけるESM受信信号とTOA,PRI,パルス幅の関係を示す図である。図5は、実施の形態2における目標追尾識別手段での各パルスのPRI算出の結果を示す図である。上述の実施の形態1では、レーダ送信を示す同期信号によりレーダ送信中に生じるESM受信信号の不可視領域を正しく識別し、ブラインドされたパルスを除くことにより、適切な信号のみを処理するようにしていた。しかし、ブラインドされたパルスを利用して諸元情報を抽出し、目標識別等に利用することもできる。
Embodiment 2. FIG.
The second embodiment will be described with reference to FIGS. 1 and 3 to 5. FIG. 4 is a diagram showing the relationship between the ESM reception signal, TOA, PRI, and pulse width in the second embodiment. FIG. 5 is a diagram illustrating the PRI calculation result of each pulse by the target tracking identification unit according to the second embodiment. In the first embodiment described above, the invisible region of the ESM reception signal generated during the radar transmission is correctly identified by the synchronization signal indicating the radar transmission, and only the appropriate signal is processed by removing the blinded pulse. It was. However, the specification information can be extracted using the blinded pulse and used for target identification or the like.

この実施の形態2における信号処理装置のブロック構成自体は、実施の形態1の図1に示した構成と同様である。また、動作については、目標追尾識別手段12での処理以外は、実施の形態1の動作と同じである。   The block configuration itself of the signal processing apparatus in the second embodiment is the same as the configuration shown in FIG. 1 of the first embodiment. The operation is the same as that of the first embodiment except for the processing in the target tracking identification unit 12.

次に、レーダ送信中に図3のようなブラインド状態の探知結果をESM用信号処理判定手段5から受け取った場合の目標追尾識別手段12の動作について説明する。目標追尾識別手段12は図3のような探知結果を受け取った際、PRIを算出するときに、隣接するパルスだけでなく、図4のように1個飛びに隣接するパルスのPRI(1個飛びのPRI)も算出する。図4では、隣接するパルスのPRIは、τ11〜τ15であり、1個飛びのPRIは、τ21〜τ24となる。ここで、各々のPRIは、2つのTOAの差であり、次式1〜4のようになる。   Next, the operation of the target tracking identification unit 12 when the blind detection result as shown in FIG. 3 is received from the ESM signal processing determination unit 5 during radar transmission will be described. When the target tracking identification means 12 receives the detection result as shown in FIG. 3, when calculating the PRI, not only the adjacent pulse but also the PRI of the adjacent pulse as shown in FIG. (PRI) is also calculated. In FIG. 4, the PRI of adjacent pulses is τ11 to τ15, and one skipped PRI is τ21 to τ24. Here, each PRI is a difference between two TOAs and is expressed by the following equations 1 to 4.

Figure 2010019678
Figure 2010019678

目標追尾識別手段12はこれらの演算結果を図5のように算出する。図5で隣接するPRIは第1PRI、1個飛びのPRIは第2PRIとした。   The target tracking identification means 12 calculates these calculation results as shown in FIG. In FIG. 5, the adjacent PRI is the first PRI, and the skipped PRI is the second PRI.

次に、目標追尾識別手段12は、図5の結果の中で、同一のPRIを探す。図4、図5では、τ11,τ12,τ23,τ15が同値のPRIとなる。次に、目標追尾識別手段12は、これらのPRIと対応するTOAを抽出する。この場合、TOAとPRIの関係から、連続したパルスであると判断され、目標識別に利用される。例えば、τ23がτ11,τ12,τ15と同一のPRIであること、τ23がTOA23とTOA25から得られなおかつTOA23とTOA25の間にTOA24があることから、TOA23とTOA24が連続したパルスであると判明する。   Next, the target tracking identification means 12 searches for the same PRI in the result of FIG. 4 and 5, τ11, τ12, τ23, and τ15 are PRIs having the same value. Next, the target tracking identification unit 12 extracts TOAs corresponding to these PRIs. In this case, it is determined that the pulses are continuous from the relationship between TOA and PRI, and is used for target identification. For example, because τ23 is the same PRI as τ11, τ12, τ15, τ23 is obtained from TOA23 and TOA25, and TOA24 is between TOA23 and TOA25, it turns out that TOA23 and TOA24 are continuous pulses .

また、上記の例では、第2PRIまでを算出したが、第nPRIまで算出して、目標識別に利用するしてもよい。この場合、1つのパルスが複数に分断されていても正しいPRIを算出できる。また、上記の例では、同値のPRIを抽出したが、抽出するPRIにある程度の誤差を許容するようにしても良い。例えば、2つのPRIの差がΔε以下であれば、同一諸元のPRIとみなして、目標識別に利用する。この場合、パルスの先頭がブラインドによりΔε分だけ欠けるような場合でも、正しい諸元を抽出できる。   Further, in the above example, up to the second PRI is calculated, but it is also possible to calculate up to the nPRI and use it for target identification. In this case, the correct PRI can be calculated even if one pulse is divided into a plurality of pulses. In the above example, PRIs having the same value are extracted, but a certain amount of error may be allowed in the extracted PRIs. For example, if the difference between two PRIs is equal to or smaller than Δε, the PRIs are regarded as having the same specifications and used for target identification. In this case, correct specifications can be extracted even when the beginning of the pulse is missing by Δε due to the blind.

以上のように、本実施の形態2によれば、目標追尾識別手段12が、ESMの受信不可視領域を含む複数のパルスの諸元情報から、パルス間隔の候補を複数作成し、同一のパルス間隔の諸元情報に基づいて目標識別および目標追尾を行なうことを特徴とする。この際、レーダ送信中に生じるESM受信信号のブラインド状態のパルスのTOAの諸元から、PRIの候補を算出して、同一のPRIを抽出することにより、有効なパルス諸元を利用することができるため、ブラインド状態のパルスであっても目標の識別等ができるという効果が得られる。これにより、探知した目標を失うことを回避することができ、レーダ・ESMシステムの探知性能向上という効果が得られる。   As described above, according to the second embodiment, the target tracking identification unit 12 creates a plurality of pulse interval candidates from the specification information of a plurality of pulses including the reception invisible region of the ESM, and the same pulse interval It is characterized in that target identification and target tracking are performed based on the specification information. In this case, it is possible to use effective pulse specifications by calculating PRI candidates from the TOA specifications of the blind pulses of the ESM received signal generated during radar transmission and extracting the same PRI. Therefore, it is possible to obtain an effect that a target can be identified even with a pulse in a blind state. Thereby, it is possible to avoid losing the detected target, and the effect of improving the detection performance of the radar / ESM system can be obtained.

この発明の実施の形態1における信号処理装置の構成を示す図である。It is a figure which shows the structure of the signal processing apparatus in Embodiment 1 of this invention. この発明の実施の形態1におけるレーダ送信信号とESM受信信号とブラインド状態を示す図である。It is a figure which shows the radar transmission signal in Embodiment 1 of this invention, an ESM reception signal, and a blind state. この発明の実施の形態1におけるESM用信号処理判定手段でのパルスの検知結果を示す図である。It is a figure which shows the detection result of the pulse in the signal processing determination means for ESM in Embodiment 1 of this invention. この発明の実施の形態2におけるESM受信信号とTOA,PRI,パルス幅の関係を示す図である。It is a figure which shows the relationship between the ESM received signal in Embodiment 2 of this invention, TOA, PRI, and a pulse width. この発明の実施の形態2における目標追尾識別手段での各パルスのPRI算出の結果を示す図である。It is a figure which shows the result of PRI calculation of each pulse in the target tracking identification means in Embodiment 2 of this invention. 従来の信号処理装置を説明する説明図である。It is explanatory drawing explaining the conventional signal processing apparatus. 従来の信号処理装置でのレーダ送信信号とESM受信信号とブラインド状態を示す図である。It is a figure which shows the radar transmission signal in the conventional signal processing apparatus, an ESM reception signal, and a blind state.

符号の説明Explanation of symbols

1 信号処理装置、2 ESM用受信アンテナ、3 ESM用受信手段、4 ESM用A/D変換同期手段、5 ESM用信号処理判定手段、6 レーダ用送受信アンテナ、7 レーダ用送信手段、8 レーダ用送信制御手段、9 レーダ用受信手段、10 レーダ用A/D変換手段、11 レーダ用信号処理手段、12 目標追尾識別手段、13 信号同期手段、101 信号処理装置、102 ESM用受信アンテナ、103 ESM用受信手段、104 ESM用A/D変換同期手段、105 ESM信号処理手段、106 レーダ用送受信アンテナ、107 レーダ用送信手段、108 レーダ用送信制御手段、109 レーダ用受信手段、110 レーダ用A/D変換手段、111 レーダ用信号処理手段、112 目標追尾手段。   DESCRIPTION OF SYMBOLS 1 Signal processing apparatus, 2 ESM receiving antenna, 3 ESM receiving means, 4 ESM A / D conversion synchronizing means, 5 ESM signal processing judgment means, 6 Radar transmitting / receiving antenna, 7 Radar transmitting means, 8 Radar Transmission control means, 9 radar reception means, 10 radar A / D conversion means, 11 radar signal processing means, 12 target tracking identification means, 13 signal synchronization means, 101 signal processing device, 102 ESM reception antenna, 103 ESM Receiving means, 104 ESM A / D conversion synchronizing means, 105 ESM signal processing means, 106 radar transmitting / receiving antenna, 107 radar transmitting means, 108 radar transmission control means, 109 radar receiving means, 110 radar A / D D conversion means, 111 radar signal processing means, 112 target tracking means.

Claims (2)

レーダとESM(Electronic Support Measures)による目標探知および識別を同時に行なうシステムにおいて、
自身のレーダ送信時に発生する前記ESMの受信不可視領域の時刻を知らせる信号同期手段と、
前記信号同期手段からの同期信号に基づいて前記ESMからの受信信号に不可視領域を示すフラグを付加するESM用A/D変換同期手段と、
前記ESM用A/D変換同期手段が付加した不可視領域を示すフラグに基づいて、前記ESMからの受信信号から得られるパルスが有効か否かを判定し、判定結果に基づいてパルスの諸元情報を出力するESM用信号処理判定手段と、
前記ESM用信号処理判定手段が出力したパルスの諸元情報に基づいて、目標識別および目標追尾を行なう目標追尾識別手段と、
を備えた信号処理装置。
In a system that simultaneously detects and identifies targets using radar and ESM (Electronic Support Measures),
A signal synchronization means for informing the time of the reception invisible region of the ESM generated at the time of its own radar transmission;
ESM A / D conversion synchronization means for adding a flag indicating an invisible region to the received signal from the ESM based on the synchronization signal from the signal synchronization means;
Based on the flag indicating the invisible area added by the ASM / D conversion synchronization means for ESM, it is determined whether or not the pulse obtained from the received signal from the ESM is valid, and the specification information of the pulse based on the determination result ESM signal processing determination means for outputting
Target tracking identification means for performing target identification and target tracking based on the specifications of the pulses output by the signal processing determination means for ESM;
A signal processing apparatus comprising:
前記目標追尾識別手段は、ESMの受信不可視領域を含む複数のパルスの諸元情報から、パルス間隔の候補を複数作成し、同一のパルス間隔の諸元情報に基づいて目標識別および目標追尾を行なうことを特徴とする請求項1記載の信号処理装置。 The target tracking identification means creates a plurality of pulse interval candidates from the specification information of a plurality of pulses including an ESM reception invisible region, and performs target identification and target tracking based on the specification information of the same pulse interval. The signal processing apparatus according to claim 1.
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