JPS5844368A - Compressing device for pulse of radar - Google Patents
Compressing device for pulse of radarInfo
- Publication number
- JPS5844368A JPS5844368A JP56143592A JP14359281A JPS5844368A JP S5844368 A JPS5844368 A JP S5844368A JP 56143592 A JP56143592 A JP 56143592A JP 14359281 A JP14359281 A JP 14359281A JP S5844368 A JPS5844368 A JP S5844368A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- width
- signal
- frequency
- compression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
- G01S13/26—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave
- G01S13/28—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、パルス捜索レーダーのパルス圧縮装置の改
良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a pulse compression device for a pulse search radar.
一般にレーダー・システムにおいては、送信電力の低減
、妨害波環境に対する抵抗能力の向上等の目的のために
、しばしばパルス圧縮方式が取り入れられている。In general, radar systems often employ a pulse compression method for purposes such as reducing transmission power and improving resistance to interference environments.
パルス圧縮方式は、特定の規則で変調した伸長搬送波パ
ルスを送信し、この伸長搬送波パルスに整合したパルス
圧縮受信処理を行なって振幅を成長させるとともにパル
ス幅を縮小させるという基本的機能を有するもので、こ
の機能によって上記の目的を達成するものであるが、従
来から種々の方式が知られている。The basic function of the pulse compression method is to transmit an expanded carrier pulse modulated according to a specific rule, and perform pulse compression reception processing that matches the expanded carrier wave pulse to grow the amplitude and reduce the pulse width. This function is used to achieve the above object, and various methods have been known in the past.
従来のパルス圧縮装置として第１図に示すものがあった
。′ｓ１図において、（２）は空中線、（１）は送受切
替器である。またＩは中間周波帯の送信信号を発生する
送信信号発生回路、■は高周波帯の局部発振器、側は送
信信号発生回路（社）及び局部発振器＠の出力周波数の
和の信号を作成する混合器、α４は混合器−の出力を増
幅する電力増幅器であり、ａθは上記回路要素（社）〜
α祷からなる送信装置である・また（２）は麺周波増幅
器、（至）は高周波増幅器（社）および局部発振器ｕ２
の出力周波数の差の信号を生成する混合器、（至）は中
間周波数増幅器、（至）はパルス圧動フィルタ、−は検
波器、（至）、＋３１９は端子であり、■は以上の回路
要素Ｃｌ１ｌ −鰭からなる受信装置である。また（３
）は本装置の出力端子である。A conventional pulse compression device is shown in FIG. In the 's1 diagram, (2) is an antenna, and (1) is a transmitter/receiver switch. Also, I is a transmission signal generation circuit that generates a transmission signal in an intermediate frequency band, ■ is a local oscillator in a high frequency band, and side is a mixer that creates a signal that is the sum of the output frequencies of the transmission signal generation circuit and local oscillator @. , α4 is a power amplifier that amplifies the output of the mixer, and aθ is the circuit element ~
It is a transmitting device consisting of α signal, and (2) is a noodle frequency amplifier, (to) is a high frequency amplifier and local oscillator U2.
A mixer that generates a signal with a difference in output frequency, (to) is an intermediate frequency amplifier, (to) is a pulse pressure filter, - is a detector, (to), +319 is a terminal, and ■ is the above circuit Element Cl1l - a receiving device consisting of a fin. Also (3
) is the output terminal of this device.
次に、動作について説明す、る。Next, the operation will be explained.
送信信号発生回路面は第２図（１） （ｂ）に示すよう
に、パルス輻Ｔ１中心周波数１０ （１０は中間周波数
）、周波数掃引幅Ｉｆの中間周波帯の周波数変調伸長パ
ルス信号を生成する。この信号の周波数スペクトルは、
周知のように、第２図（ｄ）に示す如く、はぼＩｆの広
がりを有している。As shown in Figure 2 (1) (b), the transmission signal generation circuit generates a frequency modulated expanded pulse signal in an intermediate frequency band with a pulse radius T1 center frequency 10 (10 is an intermediate frequency) and a frequency sweep width If. . The frequency spectrum of this signal is
As is well known, as shown in FIG. 2(d), the area has a width of If.
送信信号発生回路αυの出力と、局部発振器Ｑｚからの
局部発振信号は、混合器ａｌで混合され、和の周波数の
高周波信号に置換される。この出力は、電力増幅器（１
４１で増幅されて、画周波送信信号となって送受切換器
（１）を経由して、空中１１１ ＋２）から空中に放射
される。一方、目標物体（図示せず）からの反射信号は
空中線（２）で受信されて、送受切換器（１）を経由し
て受信装置（至）に導かれる。この高周波受信信号は尚
周波増幅！！（至）で低維廿増幅され、混合器□□□に
おいて上述の局部発振器ローからの局部発振信号と混合
され、中間周波（差周波）受４Ｍ信号に置換される。こ
の中間周波信号は中間周波増幅器（至）で増幅されたの
ち、端子−を経由してパルス止部フィルターにおいてパ
ルス圧輪処堆を受ける。The output of the transmission signal generation circuit αυ and the local oscillation signal from the local oscillator Qz are mixed in a mixer al and replaced with a high frequency signal of the sum frequency. This output is connected to a power amplifier (1
The signal is amplified at 41, becomes an image frequency transmission signal, and is radiated into the air from the air 111+2) via the transmitter/receiver switch (1). On the other hand, a reflected signal from a target object (not shown) is received by an antenna (2) and guided to a receiving device (to) via a transmitting/receiving switch (1). This high frequency received signal is still frequency amplified! ! It is amplified with low fiber at (to) and mixed with the local oscillation signal from the above-mentioned local oscillator low in the mixer □□□, and is replaced with an intermediate frequency (difference frequency) received 4M signal. This intermediate frequency signal is amplified by an intermediate frequency amplifier (to) and then received by a pulse pressure filter at a pulse stop filter via a terminal.
パルス圧帽フィルタ（至）は、例えば、周知の周波歓分
散型遅延線（Ｄｉｓｐｅ２ｓｉｖｅ Ｄｅｌａｙ Ｌｉ
ｎｅ ＩＤＤＬ ）によって！＃成され、第２図（１）
（ｂ）に示す信号を同図（Ｃ）のように圧縮する機能
を有する。このとき、圧ｍ後パルス幅τは概ね周波数掃
引幅Δｆの逆数１／Δｆに等しいものとなる。パルス圧
縮フィルタ（至）の圧縮後のパルス信号出力は端子（至
）を経由して検波器（２）で構成されてビデオ受信信号
となり、端子（３）から取り出され、レーダー信号処理
菌（ｉｔ（ｃｉ！Ｊ示せす）に送られる。The pulse cap filter may be, for example, a well-known frequency dispersive delay line.
ne IDDL) by! # done, Figure 2 (1)
It has a function to compress the signal shown in (b) as shown in (C) of the figure. At this time, the pulse width τ after pressure m is approximately equal to the reciprocal 1/Δf of the frequency sweep width Δf. The pulse signal output after compression of the pulse compression filter (to) passes through the terminal (to), is configured with a detector (2), becomes a video reception signal, is taken out from the terminal (3), and is sent to the radar signal processing module (IT). Sent to (ci!J Show).
以上のように、従来のパルス圧屹方式では、送信伸長波
の周波数掃引幅、即ちスペクトル幅Δｆに対して圧縮後
のパルス幅ｔ＝１／Δｆを得ることができる。これは逆
の言い方をすれば、圧縮後のパルス幅τを得るには、送
信伸長波のスペクトル幅を１／τとすればよいことにな
る。As described above, in the conventional pulse pressure method, it is possible to obtain the compressed pulse width t=1/Δf for the frequency sweep width of the transmitted expanded wave, that is, the spectral width Δf. In other words, in order to obtain the compressed pulse width τ, the spectral width of the transmitted expanded wave should be set to 1/τ.
たとえば、パルス幅ｔ −１μＳに対してはスペクトル
幅Δｆ＝１ＭＨｚとなり、スペクトル幅ノ／：１０Ｍ
ＨｚとするとパルスＷｊＡ ｔ −０，１＃Ｉとなる。For example, for a pulse width t −1 μS, the spectral width Δf = 1 MHz, and the spectral width /: 10 M
If it is Hz, the pulse WjA t -0,1#I.
従来のパルス庄紬ｓｉｍは以上のように構成されている
ので、送信伸長波のスペクトル幅が圧縮後のパルス幅の
逆数程度に限定されてしまうという制約があった。従っ
て、例えば妨害波環境における抵抗性を強めるために送
信伸長波のスペクトル幅を広くすると、それにイ辛い圧
縮後のパルス幅が狭くなってしまい、後段における信号
処理が複雑になるという欠点があった。Since the conventional pulse-sho-tsumugi SIM is configured as described above, there is a restriction that the spectral width of the transmitted expanded wave is limited to about the reciprocal of the pulse width after compression. Therefore, for example, if the spectral width of the transmitted stretched wave is widened in order to strengthen its resistance in an interference environment, the pulse width after compression becomes narrower, which is difficult to do, and the signal processing at the subsequent stage becomes complicated. .
この発明は上記のような従来のものの欠点を除去するた
めになされたもので、送信伸長波の周波数掃引幅の変化
に対応して特性の異なるパルス圧縮フィルタ群を切換え
て使用することにより、常にほぼ一定の圧縮後パルス幅
を得ることのできるレーダーのパルス圧縮装置を提供す
ることを目的としている。This invention was made to eliminate the drawbacks of the conventional ones as described above, and by switching and using a group of pulse compression filters with different characteristics in response to changes in the frequency sweep width of the transmitted stretched wave, It is an object of the present invention to provide a radar pulse compression device that can obtain a substantially constant pulse width after compression.
以下、この発明の一実施例を図について説明する。An embodiment of the present invention will be described below with reference to the drawings.
第３図はこの発明の一実施例によるパルス圧縮装置を示
し、同図では第３図の両端子ＣＣ１４）Ｃ１，間のパル
ス圧翻フィルタ回路−のみを示している。図において、
（至）は第１図と同様のパルス幅Ｔ、周波数掃引幅Δｆ
の送信伸長波をパルス幅τ＝１／Δｆに圧縮する第１の
パルス圧縮フィルタ、（社）（転）は連動して作動する
スイッチで、これは周波数掃引幅がＩｆのとき端子Ａ側
に、Δｆ′（〉）ｆ）のとき端子Ｂ側に切替えられる。FIG. 3 shows a pulse compression device according to an embodiment of the present invention, in which only the pulse compression filter circuit between both terminals CC14) and C1 in FIG. 3 is shown. In the figure,
(to) is the same pulse width T and frequency sweep width Δf as in Figure 1.
The first pulse compression filter that compresses the transmitted stretched wave to the pulse width τ = 1/Δf is a switch that operates in conjunction with the first pulse compression filter, which is connected to the terminal A side when the frequency sweep width is If. , Δf'(>)f), it is switched to the terminal B side.
またーは第２のパルス圧縮フィルタであり、これは、は
ぼＩｆの通過帯域幅を持つ前置フィルタ（財）と、パル
ス［Ｔ’（＜Ｔ）、周波数掃引幅Δｆの信号をパルス幅
τ＝１／Δｆに圧縮する主圧軛フィルタ（支）とから構
成されている。Or is the second pulse compression filter, which consists of a prefilter with a passband width of If, a pulse [T'(<T), a signal with a frequency sweep width Δf, and a pulse width of It is composed of a main pressure yoke filter (support) that compresses the pressure to τ=1/Δf.
なお、本実施例では、送信信号発生回路ａυはその周波
数掃引幅が可変となっている。In this embodiment, the frequency sweep width of the transmission signal generation circuit aυ is variable.
１１８４図および第５図は本実施例装置の動作説明図で
あり、第４図（ａ）は送信信号発生回路（６）の出力の
掃引周波数の時間的変化、同図（ｂ）はその出力振幅の
時間的変化、同図（Ｃ）は前置フィルタ翻の出力波形の
周波数の時間的変化、同図（ｄ）はその振幅の時間的変
化、同図（ｅ）はパルス圧縮フィルタ［株］の出力振幅
の時間的変化をそれぞれ示す。また第５図（λ）（ｂ）
はそれぞれ前置フィルタＳυおよび主圧縮フィルタ（支
）の帯域通過特性を示し、同図（Ｃ）はパルス圧縮フィ
ルタωの帯域通過特性を示す。1184 and FIG. 5 are explanatory diagrams of the operation of the device of this embodiment. FIG. 4(a) shows the temporal change in the sweep frequency of the output of the transmission signal generation circuit (6), and FIG. 4(b) shows the output. The figure (C) shows the temporal change in the amplitude of the output waveform of the prefilter, (d) shows the temporal change in the amplitude, and the figure (e) shows the change in the frequency of the output waveform of the prefilter. ] respectively show the temporal changes in the output amplitude. Also, Fig. 5 (λ) (b)
show the bandpass characteristics of the prefilter Sυ and the main compression filter (support), respectively, and (C) of the same figure shows the bandpass characteristic of the pulse compression filter ω.
次に′Ｉ６３図ないし第５図を参照して動作につい−て
説明する。Next, the operation will be explained with reference to FIGS. 163 to 5.
本実施例においで、第３図に−は図示していない第１図
と共通な部分については同様の動作をするので説明を省
略するが、送信信号発生回路（社）における周波数掃引
幅を第４図（１１） （ｂ）に示すようにΔｆ′（〉Δ
ｆ）に変化させ、従って、送信伸長波のスペクトル幅も
第５図（ａ）のようにΔｆ′と広くするものとする。In this embodiment, the parts common to those in FIG. 1, which are not shown in FIG. As shown in Figure 4 (11) (b), Δf′(〉Δ
Therefore, the spectral width of the transmitted expanded wave is also widened to Δf' as shown in FIG. 5(a).
本実施例において、上述と同様の動作により、端子（至
）に第４図（１１） （ｂ）に示す特性の信号が現われ
ると、これは周波数掃引幅が広いため、スイッチ（財）
の端子Ｂ側を経由してパルス圧縮フィルタωに加えられ
る。このパルス圧紬フィルタ団の前置フィルタ６υは第
５図（ｂ）に示すように、はぼΔｆの通過帯域幅を持た
せてあり、その結果、前置フィルタ５１１の出力には、
第５図（Ｃ）のようなスペクトル幅がほぼΔｆの１ｉ号
が現われる。この信号は、時間波形で示すと第４図（Ｃ
） （ｄ）に示すように、周波数掃引幅Δｆ。In this embodiment, when a signal with the characteristics shown in FIG. 4 (11) (b) appears at the terminal (to) due to the same operation as described above, this is because the frequency sweep width is wide.
is applied to the pulse compression filter ω via the terminal B side of the . As shown in FIG. 5(b), the prefilter 6υ of this pulse pressure filter group has a passband width of approximately Δf, and as a result, the output of the prefilter 511 has the following:
No. 1i with a spectrum width of approximately Δf appears as shown in FIG. 5(C). This signal is shown in the time waveform as shown in Figure 4 (C
) As shown in (d), the frequency sweep width Δf.
パルス幅Ｔ′の信号となる。そこで、主圧縮フィルター
に、パルス幅Ｔ′、周波数掃引幅Ｉｆの信号をパルス幅
τ＝１／Δｆに圧縮するような圧縮特性を与えることに
より、その出力には第４図（ｅ）に示すように従来と同
様の時間波形が得られることになる。This becomes a signal with a pulse width T'. Therefore, by giving the main compression filter a compression characteristic that compresses the signal with pulse width T' and frequency sweep width If to pulse width τ = 1/Δf, its output is shown in Figure 4 (e). Thus, a time waveform similar to the conventional one can be obtained.
一方、妨害波のない環境では、周波数掃引幅を大きくし
ないためスイッチ偵１１−は従来のパルス圧縮フィルタ
（至）側に接続され、この場合、従来装置と同様に動作
する。On the other hand, in an environment without interference waves, the switch 11- is connected to the conventional pulse compression filter (to) side in order not to increase the frequency sweep width, and in this case, it operates in the same way as the conventional device.
なお、上記実施例では、パルス圧縮フィルタを１個だけ
付加するものについて示したが、これは１個に限定され
るものではなく、送信伸長パルス内周波数掃引幅の変化
に対応して、パルス圧縮フィルタを複数個付加−しても
よい。In the above embodiment, only one pulse compression filter is added, but this is not limited to one, and the pulse compression filter is applied in response to changes in the frequency sweep width within the transmission expansion pulse. A plurality of filters may be added.
また、上記実施例では前置フィルタと主圧動フィルタを
分離したものについて説明したが、両者が一体となった
構成のものを用いてもよい。Further, in the above embodiment, the prefilter and the main pressure dynamic filter are separated, but a structure in which the two are integrated may also be used.
以上のように、この発明によれば、送信伸長波の周波数
掃引幅の変化に対応してパルス圧縮フィルタを複数個設
け、常にほぼ一定の圧縮後パルス幅を得るように構成し
たので、圧縮後のパルス幅変化による信号処理装置の複
雑化を招くことなく、−妨害波環境に対し送信信号のス
ペクトル幅拡大による抵抗性の向上をはかれるという効
果がある。As described above, according to the present invention, a plurality of pulse compression filters are provided in response to changes in the frequency sweep width of the transmitted stretched wave, and the configuration is such that a substantially constant pulse width after compression is always obtained. This has the effect of improving resistance to interference wave environments by expanding the spectrum width of the transmitted signal, without complicating the signal processing device due to pulse width changes.
第１図は従来のレーダーのパルス圧縮装置を示すブロッ
ク図、第２図はその動作説明図、第３図は本発明の一実
施例によるレーダーのパルス圧縮装置を示す概略ブロッ
ク図、−第４図および第５図はその動作説明図である。
（１）・・・送受切替器、叩・・・送信信号発生回路、
αト・・送信装置、（至）・・・受信装置、ＩＧ・・・
パルス圧縮フィルタ回路、（至）ω・・・パルス圧縮フ
ィルタ。
なお図中同一符号は同−又は相当部分を示す。
第２図
第３図
第４図
Ｐキ間
第５図
↑
し
へFIG. 1 is a block diagram showing a conventional radar pulse compression device, FIG. 2 is an explanatory diagram of its operation, and FIG. 3 is a schematic block diagram showing a radar pulse compression device according to an embodiment of the present invention. 5 and 5 are explanatory diagrams of the operation. (1)...transmission/reception switch, tap...transmission signal generation circuit,
α... Transmitting device, (to)... Receiving device, IG...
Pulse compression filter circuit, (to) ω...Pulse compression filter. Note that the same reference numerals in the figures indicate the same or equivalent parts. Figure 2 Figure 3 Figure 4 Figure 5 ↑
Claims (1)
理時にパルス幅を圧縮するレーダーのパルス圧縮装置に
おいて、周波数掃引幅が可炭の周波数変調伸長パルス信
号を発生する送信信号発生回路と、該送信信”号発生回
路を含み該回路の出力を高周波信号に変換し送受切替器
を介して送信する送信装置と、上記送受切替器を介して
受信した信号を変調する受信装置と、それぞれほぼ一定
の通過帯域幅を有し上記周波数掃引幅の艮化に対応して
切替えられる複数のパルス圧動フィルタからなり常にほ
ぼ一定の圧Ｉｉ後後パス１幅得る上記受信装置に含まれ
るパルス圧縮フィルタ回路とを備えたことを特徴とする
レーダーのパルス圧縮装置。(1) In a radar pulse compression device that uses a frequency modulated expanded pulse signal as a transmitted signal and compresses the pulse width during reception processing, a transmission signal generation circuit that generates a frequency modulated expanded pulse signal with a carbonable frequency sweep width; a transmitter that includes the transmission signal generation circuit and converts the output of the circuit into a high-frequency signal and transmits it via the transmitter/receiver switch; and a receiver that modulates the signal received via the transmitter/receiver switcher; A pulse compression filter included in the receiving device, which always obtains a substantially constant pressure Ii and a rear pass 1 width, which is comprised of a plurality of pulse pressure filters having a constant passband width and which are switched in accordance with the variation of the frequency sweep width. A radar pulse compression device characterized by comprising a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56143592A JPS5844368A (en) | 1981-09-10 | 1981-09-10 | Compressing device for pulse of radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56143592A JPS5844368A (en) | 1981-09-10 | 1981-09-10 | Compressing device for pulse of radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5844368A true JPS5844368A (en) | 1983-03-15 |
Family
ID=15342302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56143592A Pending JPS5844368A (en) | 1981-09-10 | 1981-09-10 | Compressing device for pulse of radar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5844368A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03176687A (en) * | 1989-12-05 | 1991-07-31 | Mitsubishi Electric Corp | Radar equipment |
| WO2009145490A1 (en) * | 2008-04-03 | 2009-12-03 | (주) 밀리시스 | Pulse waveform transmission method for pulse compression radar for shadow zone detection, and a pulse compression radar and radar network that uses the same |
| JP2010266400A (en) * | 2009-05-18 | 2010-11-25 | Japan Radio Co Ltd | Radar device |
| JP2018508777A (en) * | 2015-02-16 | 2018-03-29 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Ranging method and apparatus |
-
1981
- 1981-09-10 JP JP56143592A patent/JPS5844368A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03176687A (en) * | 1989-12-05 | 1991-07-31 | Mitsubishi Electric Corp | Radar equipment |
| WO2009145490A1 (en) * | 2008-04-03 | 2009-12-03 | (주) 밀리시스 | Pulse waveform transmission method for pulse compression radar for shadow zone detection, and a pulse compression radar and radar network that uses the same |
| JP2010266400A (en) * | 2009-05-18 | 2010-11-25 | Japan Radio Co Ltd | Radar device |
| JP2018508777A (en) * | 2015-02-16 | 2018-03-29 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Ranging method and apparatus |
| US10578729B2 (en) | 2015-02-16 | 2020-03-03 | Huawei Technologies Co., Ltd. | Ranging method and apparatus |
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