JPS58195172A - Radar device - Google Patents
Radar deviceInfo
- Publication number
- JPS58195172A JPS58195172A JP57078834A JP7883482A JPS58195172A JP S58195172 A JPS58195172 A JP S58195172A JP 57078834 A JP57078834 A JP 57078834A JP 7883482 A JP7883482 A JP 7883482A JP S58195172 A JPS58195172 A JP S58195172A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- amplitude
- side lobe
- time
- 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
Landscapes
- 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】
この発明に、パルス圧縮方式のレーダ装置におけるレン
ジサイドロープの除去に関するｔのでめるＯ
通常のパルス圧縮方式のレーダのパルス圧縮後の構成の
一例を第１図に示す。図において、１１１区パルス圧縮
回路、（２）に各種の信号処理回路（ＭＴＩ等）、１！
１に検出回路である０
次に動作について説明する。ｌ！２図１１１に、目標信
号の時刻と振幅を示す図であるが（図の例に３目標が接
近している場合）藁１図に示すパルス圧縮方式レーダの
パルス圧縮回路（凰）の出力に、第２図缶）に示すよう
に、時刻方向にレンジサイドローブが現われる０この信
号を第１図に示す検出回路（３）で第２図缶）の検出レ
ベル１以上の信号を検出すると、靴２図（Ｃ）に示すよ
うに目標の分離ができない。また、目標を分岐するため
に、検出レベルを第２図（ｂ）のＨにすると、検出信号
ａ第２図（ｄ）に示すように小目標の検出ができなくな
る。DETAILED DESCRIPTION OF THE INVENTION This invention relates to the removal of range side ropes in a pulse compression type radar device.An example of the configuration of a normal pulse compression type radar after pulse compression is shown in FIG. . In the figure, the 111th section pulse compression circuit, (2) various signal processing circuits (MTI, etc.), 1!
1 is a detection circuit.Next, the operation will be explained. l! 2. Figure 111 is a diagram showing the time and amplitude of the target signal (when three targets are approaching in the example in the figure). , as shown in Figure 2), a range sidelobe appears in the time direction.If this signal is detected by the detection circuit (3) shown in Figure 1 at a detection level of 1 or higher in Figure 2), As shown in Figure 2 (C), the target cannot be separated. Furthermore, when the detection level is set to H in FIG. 2(b) in order to branch the target, the detection signal a becomes impossible to detect a small target as shown in FIG. 2(d).
このように従来の装置によれば、パルス圧縮後の信号に
レンジサイドローブが現われ、目標が接近している場合
に、大＠Ｖｈ目標信号のサイドロープに小さい目標信号
が隠れて、検出できない場合があった０
この発明に、圧縮後の信号のピークの時刻と蚤暢からレ
ンジサイドローブの時刻と振幅を推定し、これを起える
信号を別目標として検出することにより、大きい目標信
号のレンジサイドローブに隠れて、検出困離でめった小
さな目標信号を検出することができるレーダ装置管提供
することを目的としている。In this way, according to the conventional device, when a range sidelobe appears in the signal after pulse compression and the target is approaching, a small target signal is hidden in the sidelobe of the large @Vh target signal and cannot be detected. 0 This invention estimates the time and amplitude of the range side lobe from the peak time and amplitude of the signal after compression, and detects the signal that causes this as a separate target, thereby improving the range of a large target signal. The object of the present invention is to provide a radar device tube capable of detecting very small target signals hidden in side lobes and difficult to detect.
以下、この発明の一実施例【図について＃Ｒ，明する０
累３図に、おいて、１１１ｒＸパルス圧縮回路、（！ｌ
ｉ各種信号処理回路、＋４１Ｆ！信号の振＠を一時的に
記憶しておく振幅記憶回路、［６１Ｈ信号のピークの振
幅と時刻音検出するビータ時刻位置検出回路、（６）に
パルス圧縮によって生じるレンジサイドロープのパター
ン會記憶しているサイドローブパターン記憶回路、（７
）にピーク時刻位置検出１６１で検出したピーク時刻、
振幅とサイト０ローブパターン記憶回路（６）のサイド
ロープパターンから、減算信号を作成する減算信号作成
回路、（８）に記憶回路（４）に記憶した信号から減算
信号作成回路（７）で作成した信号管減算する減算回路
、ｔ３１に検出回路である０次に。作ヶ説、オ、。ｉｔ
□
ａ＋＊う憶回あ１４，４、ビ≠、１：１ンエ、□、（６
）でパルス圧縮回路ｉｌ＋の出力のピークの時刻、振幅
を検出する以前の信号からも減算回路（８）で減算ケ行
うために、各徨借号処理回路＋２１を経たパルス圧縮回
路＋ＩＩの出力信号の振幅を記憶しておく０ビ一ク時刻
位置検出回路（６）に、信号のピークの時刻と振＠全検
出するが、ディジタル信号処理１行っている場合、必ら
ずしも信号のピークをサンプリングするとは限らないた
め、減算信号の作成を正確にするため、サンプリング信
号の最大値と、その前後の振幅の大きい方の信号から、
第４図（ｃ）に示すように、信号のピークの時刻と振暢
ヲ計１ｉ１．−ｆ＾。Hereinafter, one embodiment of the present invention will be described.
In Figure 3, the 111rX pulse compression circuit, (!l
iVarious signal processing circuits, +41F! An amplitude storage circuit that temporarily stores the amplitude of the signal, a beater time position detection circuit that detects the peak amplitude and time sound of the 61H signal, and (6) stores the pattern of the range side rope caused by pulse compression. sidelobe pattern memory circuit, (7
), the peak time detected by the peak time position detection 161,
A subtraction signal creation circuit (8) creates a subtraction signal from the side lobe pattern of the amplitude and site 0 lobe pattern storage circuit (6), and a subtraction signal creation circuit (7) creates a subtraction signal from the signal stored in the storage circuit (4). The subtraction circuit that subtracts the signal tube, and the detection circuit at t31 is the 0th order. Sakuga theory, oh. it
□ a + * memory time a 14, 4, bi ≠, 1:1 n e, □, (6
) to detect the peak time and amplitude of the output of the pulse compression circuit il+ in the subtraction circuit (8). The signal peak time and amplitude are detected in the zero peak time position detection circuit (6) that stores the amplitude of the signal. However, when digital signal processing 1 is performed, the signal peak , so in order to create a subtraction signal accurately, from the maximum value of the sampling signal and the signals with larger amplitudes before and after it,
As shown in FIG. 4(c), the time of the peak of the signal and the total amplitude of the signal are 1i1. -f^.
減算信号作成回路（７）ホ、サイドロープパターン記憶
回路１８）に記憶しているサイドロープパターンと、ビ
ータ時刻位置検出回路（５）で計算した信号のピークの
時刻と振幅から、サイドロープの時刻と振幅を推犀し、
ｍ４図（ｄ）に示すように、サンプリング信号のピーク
と、その前後の振幅の大きい方の信号を除いたサンプリ
ング時刻に対応した減算信号１１・
を作成する０滅葬回路ｆ８１ ｒ’Ｕ 、振幅記憶回路
（４）に記１：
憶された信号がら、減算信号作成回路（７）で作成した
減算毎号を時ｉに対応して減算し、第４図（ｅ）に
１示す出力を得る０検出回路（３）に第４図（ｅ）の検
出レベル以上の信号を検出することＫより、＠４図（ｆ
）に示すように振幅の異なる接近した目標全分離、検出
することができる〇
なお、上記実施例でに、パルス圧縮回路によるパルス圧
縮後の信号からサイドロープの信号を減算する構成を示
したが、検出回路の検出レベル全レンジサイドロープの
振幅により、時刻毎に変化させても同様の効果が得られ
る。The time of the side rope is calculated from the side rope pattern stored in the subtraction signal generation circuit (7) e, side rope pattern storage circuit 18) and the signal peak time and amplitude calculated by the beater time position detection circuit (5). and estimate the amplitude,
m4 As shown in Figure (d), a zero eradication circuit f81 r'U, amplitude Recorded in the memory circuit (4) 1: From the stored signals, each subtraction number created by the subtraction signal creation circuit (7) is subtracted corresponding to time i, and the result is shown in FIG. 4(e).
Since the 0 detection circuit (3) which obtains the output indicated by 1 detects a signal higher than the detection level shown in Fig. 4(e), @Fig. 4(f)
), it is possible to detect all separations of approaching targets with different amplitudes.In addition, in the above embodiment, a configuration was shown in which the side rope signal is subtracted from the signal after pulse compression by the pulse compression circuit. , the same effect can be obtained even if the detection level of the detection circuit is changed at every time depending on the amplitude of the full range side rope.
また、減算後の信号ｔ、検出回路によって自動検出を行
わず、指示機にアナロブで表示する場合にも、同様の効
果が得られる〇
以上のように、この発明によれば、パルス圧縮によって
生ずるレンジサイドローブの存在にかかわらず目標全分
離、検出することができる。Furthermore, the same effect can be obtained even when the signal t after subtraction is not automatically detected by the detection circuit and is displayed in analog form on the indicator.〇As described above, according to the present invention, the signal t generated by pulse compression The target can be completely separated and detected regardless of the presence of range side lobes.
藁１図に従来のパルス圧縮方式のレーダの主要構成を示
すブロック図、５８２図に、その動作ａ＠８用の説明図
、第３図に本発明の一実施例による構成を示すブロック
図、第４図に本発明の動作説明画である。
図中、Ｉｌ＋・・・パルス圧縮回路、（２）・・・各種
信号処理回路、（４）・・・振幅記憶回路、（６１・・
・ピーク時刻位置検出回路、（６）・・・サイドロープ
パターン記憶回路、（７）・・・減算信号作成回路、（
８）・・・減算回路、（３）・・・検出回路である〇
なお、図中同一符号に同−又に相当部分を示す〇代理人
葛野信−
第１図
第２図Figure 1 is a block diagram showing the main configuration of a conventional pulse compression type radar, Figure 582 is an explanatory diagram of its operation a@8, and Figure 3 is a block diagram showing the configuration according to an embodiment of the present invention. FIG. 4 is a diagram illustrating the operation of the present invention. In the figure, Il+...pulse compression circuit, (2)...various signal processing circuits, (4)...amplitude storage circuit, (61...
・Peak time position detection circuit, (6)...Side rope pattern storage circuit, (7)...Subtraction signal creation circuit, (
8)...Subtraction circuit, (3)...Detection circuit〇In addition, the same reference numerals in the figures indicate the same or corresponding parts〇Representative Makoto Kuzuno- Fig. 1 Fig. 2
Claims (1)
よって定まるレンジサイドローブのパターン【記憶して
おき、圧縮後の信号のピークの振幅と時刻から上記記憶
したパターンに従ってレンジサイドローブの振幅と時刻
管推足し、この推定値を起える信号を目標信号として検
出するようにした事を特徴とするレーダ装置０[Claims] In a radar using a pulse compression method, a range side lobe pattern is determined by the compression method, circuit, etc. A radar device 0 characterized in that the amplitude of a range side lobe and a time tube are estimated, and a signal that generates this estimated value is detected as a target signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57078834A JPS58195172A (en) | 1982-05-08 | 1982-05-08 | Radar device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57078834A JPS58195172A (en) | 1982-05-08 | 1982-05-08 | Radar device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58195172A true JPS58195172A (en) | 1983-11-14 |
Family
ID=13672853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57078834A Pending JPS58195172A (en) | 1982-05-08 | 1982-05-08 | Radar device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58195172A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009503403A (en) * | 2005-07-29 | 2009-01-29 | グラコ ミネソタ インコーポレーテッド | Reciprocating pump with electronically monitored air valve with battery and solenoid electronic monitor |
| JP2010014664A (en) * | 2008-07-07 | 2010-01-21 | Mitsubishi Electric Corp | Apparatus and method for tracking target |
| US8193974B2 (en) * | 2009-03-04 | 2012-06-05 | Honeywell International Inc. | Systems and methods for suppressing ambiguous peaks from stepped frequency techniques |
| JP2012220449A (en) * | 2011-04-13 | 2012-11-12 | Furuno Electric Co Ltd | Range side lobe removal device, signal processor, radar apparatus having signal processor, range side lobe removal method and program |
| JP2014153274A (en) * | 2013-02-12 | 2014-08-25 | Furuno Electric Co Ltd | Underwater detection method and underwater detection device |
-
1982
- 1982-05-08 JP JP57078834A patent/JPS58195172A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009503403A (en) * | 2005-07-29 | 2009-01-29 | グラコ ミネソタ インコーポレーテッド | Reciprocating pump with electronically monitored air valve with battery and solenoid electronic monitor |
| JP4933545B2 (en) * | 2005-07-29 | 2012-05-16 | グラコ ミネソタ インコーポレーテッド | Reciprocating pump with electronically monitored air valve with battery and solenoid electronic monitor |
| JP2010014664A (en) * | 2008-07-07 | 2010-01-21 | Mitsubishi Electric Corp | Apparatus and method for tracking target |
| US8193974B2 (en) * | 2009-03-04 | 2012-06-05 | Honeywell International Inc. | Systems and methods for suppressing ambiguous peaks from stepped frequency techniques |
| JP2012220449A (en) * | 2011-04-13 | 2012-11-12 | Furuno Electric Co Ltd | Range side lobe removal device, signal processor, radar apparatus having signal processor, range side lobe removal method and program |
| JP2014153274A (en) * | 2013-02-12 | 2014-08-25 | Furuno Electric Co Ltd | Underwater detection method and underwater detection device |
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