JPS5990404A - Side lobe canceller - Google Patents

Side lobe canceller

Info

Publication number
JPS5990404A
JPS5990404A JP57200592A JP20059282A JPS5990404A JP S5990404 A JPS5990404 A JP S5990404A JP 57200592 A JP57200592 A JP 57200592A JP 20059282 A JP20059282 A JP 20059282A JP S5990404 A JPS5990404 A JP S5990404A
Authority
JP
Japan
Prior art keywords
signal
antenna
output signal
output
circuit
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.)
Granted
Application number
JP57200592A
Other languages
Japanese (ja)
Other versions
JPH0445793B2 (en
Inventor
Takashi Omuro
大室 隆
Yasuo Tachibana
立花 康夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP57200592A priority Critical patent/JPS5990404A/en
Publication of JPS5990404A publication Critical patent/JPS5990404A/en
Publication of JPH0445793B2 publication Critical patent/JPH0445793B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H01Q3/2611Means for null steering; Adaptive interference nulling
    • H01Q3/2629Combination of a main antenna unit with an auxiliary antenna unit

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To reproduce only a desired signal from a main lobe with fidelity by providing a correlation device inputting an output signal of the titled side lobe canceller and a multiplier circuit inputting an output signal of a DC amplifier and that of a 90 deg.C phase shifter, in a receiver for a radar or the like. CONSTITUTION:The center frequency of a main signal (u) and a reference signal (x) is identical in the figure. Further, an orthogonal component signal xQ is produced newly by the 90 deg.C phase shifter from the reference signal (x). In the figure, 20 is the correlation device added newly and takes the correlating component between the orthogonal component signal xQ and an output signal (z) and comprises a mixer 18 and a low-pass filter 19. The correlating devices 17, 20 produce orthogonal signals rI, rQ of the base band, and 21, 22 are DC amplifiers, wI, wQ being the I, Q components of the complex weight are produced by them. Since a part of the correlation loop is constituted by the I, Q signals of the base band in this way, the phase is not lost even by the low-pass filtering in obtaining the complex weight and stable weight is obtained.

Description

【発明の詳細な説明】 本発明はレーダ等の受信装置においτ、受信アンテナの
サイドローブより入射する妨害波等の不要葡、波の影響
ン抑圧し、王ローブからの所望信号のみン忠実に再埃す
る機能を持つ、サイドローブ・キャンセラの改良に係る
DETAILED DESCRIPTION OF THE INVENTION The present invention suppresses the influence of unwanted waves such as τ and interference waves incident from the side lobes of the receiving antenna in a receiving device such as a radar, and faithfully reproduces only the desired signal from the king lobe. This relates to the improvement of a sidelobe canceller that has a re-dusting function.

サイドローフ キャンセラは、主アンテナであ/)愛情
アンテナと並列に無指向性の補助アンテナケーイ(^1
またけ複数個設け、谷補助アンテナに対し相関ループが
運なる栴成乞しており、主アンテナの受情皐−吟と、谷
イ1)1助アンテナの受悟佃力との相IH値にノー;つ
いて、王アンテナの受信佃Jrjにおける。
The side loaf canceller is the main antenna/) An omnidirectional auxiliary antenna (^1) is placed in parallel with the love antenna.
Multiple antennas are installed over each other, and the correlation loop is connected to the valley auxiliary antenna. No; in the reception of the king antenna Tsukuda Jr.

サイドローブより入射する不戦和波の推定信号ン生成し
、これを王アンテナの受1ぎ信号から減する事によって
、所望信号のみン残す(舛能ン持つものである。卯暑図
に従来のサイドローブ・キャンセラの101路猶成図ケ
示す。倉]、1図において、(1)は王アンテナ、(2
)げ補助アンテナである。本1ネ1では簡単のために、
補助アンテナが1本の場合ケかす。
By generating an estimated signal of the Fukuwa wave incident from the side lobe and subtracting it from the receiving signal of the main antenna, only the desired signal is left. The 101st sidelobe canceller diagram is shown in Figure 1. In Figure 1, (1) is the king antenna, (2
) is an auxiliary antenna. In Book 1 Ne1, for the sake of simplicity,
If there is only one auxiliary antenna, skip it.

さて、2本のアンテナで受信された1−ぎ号は局部発振
器ta+と、ミキサt41. t5+により中心周波数
ωIF乞持った中間内V叔(1F)の信号に変袴される
。王アンテナからの入力18号は、更に局部発振器((
j)と。
Now, the 1-gear signal received by the two antennas is sent to the local oscillator ta+ and the mixer t41. At t5+, the signal is changed to a signal of intermediate V (1F) with the center frequency ωIF. Input No. 18 from the antenna is further connected to a local oscillator ((
j) and.

ミキサ(7)により周波数ω工F+ω0の信号Uに食菌
される(これ馨千惰号と呼ぶ)。イー=シ、ω。は局部
発秦器(610周波数である。これに対して、補助アン
テナからの入力1M号は中心周波数ω工F乞持った1百
号Xであられしである(これケ参照色号と呼ぶン。
The mixer (7) feeds into the signal U of frequency ωF+ω0 (this is called Kaorusenina-go). Yi=si, ω. is the local oscillator (610 frequency).On the other hand, the input 1M signal from the auxiliary antenna is 100 signal X with the center frequency ω(ω) (this is called the reference color code). .

(8)はミキサであり、参照信号Xと荷亜信号Wケア1
も合し、主信号中に含寸れる妨簀波信号成分の推w1=
号である信号y7生成する。後述するように荷重信号W
の中心周波数ばω。であるため、信号yの中心周波数は
ω工F±ω。となる。+tJげ加算器であり主信号Uか
ら信号yヶ減する機能ン持つ。また。
(8) is a mixer with reference signal X and subsignal W care 1
Together, the estimation of the interference wave signal component included in the main signal w1=
A signal y7 is generated. As described later, the load signal W
The center frequency is ω. Therefore, the center frequency of the signal y is ω F±ω. becomes. It is a +tJ addition adder and has the function of subtracting the signal y from the main signal U. Also.

Olに中心周波数ω工F+ω。の帯域フィルタであり帯
域フィルタ叫への入力信号におけるω工F−ω0娑中心
周波数とする信号成分ケカットオフする。このようにし
て生成された信号2がサイドローブ・キャンセラの出力
信−号となるが、信号2は中心周波数がω工F+ω。の
信号であり、主信号y中の所望信号成分に等しい。さら
に出力信号2はミキサ(111により参照信号Xと混合
され、中心周波数ω0の信号に変撲される。+1′2は
中心周波数ω0の狭帯域フィルタであり、ミキサ111
と狭帯域フィルタQ2により相関器(13が構成される
。また、0々は中心周波数ω0の#域M幅器であり、こ
の出力信号である荷重信号■がミキサ(81に入力され
る事により、相関フィードバックルーブン構成している
The center frequency ω is F + ω in Ol. It is a bandpass filter that cuts off the signal component whose center frequency is ω(F−ω0) in the input signal to the bandpass filter. Signal 2 generated in this way becomes the output signal of the sidelobe canceller, and the center frequency of signal 2 is ω F + ω. , which is equal to the desired signal component in the main signal y. Further, the output signal 2 is mixed with the reference signal X by a mixer (111) and transformed into a signal with a center frequency ω0.
A correlator (13 is configured by , consists of a correlated feedback loop.

以上の構成において、狭帯域フィルタ(121にその入
力信号の位相成分が出力信号において保存されるように
構成これる串が望ましい。しかし、工F帝において位相
成分が保存されるような狭帯域フィルタの構成vi困難
である。第1図の従来のサイドローブ・キャンセラにお
いてDJ−j上のような構成上の欠点乞持っている。
In the above configuration, it is preferable to use a narrow band filter (121) configured so that the phase component of the input signal is preserved in the output signal. The conventional sidelobe canceller shown in FIG. 1 has the same structural drawbacks as the DJ-j.

本発明は以上の欠点ケ袖うために第1図におけるミキサ
011からミキサ(8)までの間の処理ケベースバンド
帝で脚付相成分(inphaee成分、以下「工成分」
と略記する)及び直交位相成分(q ua、clra、
1ure我分、以下「Q成分」と略記する)ン用いて狭
帯域フィルタリングにおける位相の保存が精度良く行な
われるように改良したものである。この改良ンイ了うた
めに、第2図のような]戸j路ケ構Jj文する。
In order to overcome the above-mentioned drawbacks, the present invention has been developed to solve the problem of the inphaee component (hereinafter referred to as "engine component") in the processing baseband between mixer 011 and mixer (8) in FIG.
) and quadrature phase components (q ua, clra,
This is an improvement so that phase preservation in narrowband filtering can be performed with high precision using a Q component (hereinafter abbreviated as "Q component"). In order to complete this improvement, we will create a structure like the one shown in Figure 2.

第2図においては、第1図における局部発振器(6)と
ミキサ(7)乞増Vはすし2.主信号Uと、参照信号X
の中心筒波数が同一になっている。更に、参照信号Xに
ついてに90°の移相器αつを使って直交成分信号xQ
をiたに生成している。翰は新たに加えた相関器であり
、ミキサUと低域フィルタα9により構成され1a交成
分信号XQと出力信号2との相関成分ンとるものである
。相関器α7)と翰によりベースバンド帯の原文信号r
1とrQ、が生成される。
In FIG. 2, the local oscillator (6) and mixer (7) in FIG. Main signal U and reference signal X
The center cylinder wave numbers of are the same. Furthermore, for the reference signal X, the orthogonal component signal xQ is
is generated every time. A correlator is a newly added correlator, which is composed of a mixer U and a low-pass filter α9, and is configured to take the correlation component between the 1a cross component signal XQ and the output signal 2. The original signal r in the baseband band is
1 and rQ are generated.

のl、(22は直流増暢器である。これらによV複素荷
重の工、Q成分であるW□、vIQが生成される。(ハ
)(241は乗算器、Qωは刃口算器でありこれらによ
って伯+−tw11wQ、x、xQから再び工F信号y
’li求める事になる。
l, (22 is a DC multiplier. These generate the V complex load component, W□, vIQ, which is a Q component. (C) (241 is a multiplier, and Qω is a blade calculator. With these, the engineering F signal y is again output from +-tw11wQ, x, xQ.
'Li will be asked for.

以上の事乞より詳細1に説明すると次のようになる1、
まず参照信号Xと出力信号2の工Fにおける複索色落信
号ケX。、z8とし、これらの振幅及び位相成分娑それ
ぞれax h az *θ8.θ7とするとxo=aX
ejθX   ・・・・・・・ ・・・・・・・・(1
1jθ2    ・・・・・・・・・・・・・・・・・
・・・・(21ze ” aze jω工Ft x=Ro(x8e   )=axai(ω工yt+θす
・・・田)z=Ro(zoejo)TFt)=a、r、
aq(ωTFt 4− Up+) ・・・(4iとなる
。また信号XQ 0 XQ−工m(x e e j”■”)”aXr、ln(
ωlFt+θx) ・−(51となる。そこで相関1器
Q71及びC8)の出力信号であるr工、rQにおいて
(鳴1代域フィルタ叫、αIIにより中心周阪数2ω工
Fン持つ成分が減艮し1次のようになる。
If you explain the above in more detail 1, it will be as follows 1,
First, the multiple color fading signal X in the process F of the reference signal X and the output signal 2. , z8, and their amplitude and phase components are respectively ax h az *θ8. If θ7, xo=aX
ejθX ・・・・・・・・・・・・・・・(1
1jθ2 ・・・・・・・・・・・・・・・・・・
・・・・・・(21ze ” aze jω工Ft x=Ro(x8e)=axai(ω工yt+θsu...田)z=Ro(zoejo)TFt)=a, r,
aq(ωTFt 4- Up+)...(becomes 4i. Also, the signal XQ 0
ωlFt + θx) ・-(51. Therefore, in the output signals r and rQ of the correlation unit Q71 and C8), the component having the central frequency number 2ω and rQ is reduced by αII. Then it becomes the first order.

r工” XZ ”” z azaJ 0FIR(θz−
(1器月=±(R(附J)  ・・・・・・・・・・(
6)e rQ =XQZ−2aXa7 (sin (”。−ox
)−十(−Im(−月 ・・・・・・・・・・ (7)
旬し、−げ1代、域フィルタリングの結果ケあられす。
r engineering"XZ""z azaJ 0FIR(θz-
(1 month = ±(R (Appendix J)) ・・・・・・・・・(
6) e rQ =XQZ-2aXa7 (sin (”.-ox
)-ten(-Im(-month ・・・・・・・・・(7)
The results of the area filtering are shown below.

さて、増幅器(161,+171のゲインヶ2gとする
と結局。
Now, if the gain of the amplifier (161, +171) is 2g, then after all.

荷重のI及びQ成分であるWニー WQ n次のように
なる。
W knee WQ which is the I and Q components of the load is as follows.

Wニー2ビrニーgRoCζひ)・・・ ・・・・・・
・・(8)WQ= 2grq ニーgI、(Z、’X、
=川・叫−町−+9iそこで W = vr工jWQ= g Ze”e”  3.−−
 Qlとおけは加算器(ハ)の出刃信号である信号yは
0次のようになる。
W knee 2 vinyl gRoCζhi)... ・・・・・・
...(8) WQ = 2grq Knee gI, (Z, 'X,
=River/Shou-Town-+9i There W = vr 工jWQ= g Ze”e” 3. ---
Ql and the signal y, which is the cutting edge signal of the adder (c), are of zero order.

y−wIx+wQxQ −g[R6(zexe ) ・R6(X6e””1F1
)−* Im(zexe )1m(Xoej0工F″)」−* = g F+ 6 (1S−Xeθ3町y1)−R8(
WX)   ・・・・・・・・・・・・・・・・・・・
・・・・・・山川・・  (+11となる。即ち、4N
′号yはi=+4fxに対して複素荷重Wン乗じた信号
の実数部分となる。
y-wIx+wQxQ -g[R6(zexe) ・R6(X6e""1F1
) −* Im (zexe ) 1 m (
WX) ・・・・・・・・・・・・・・・・・・
...Yamakawa... (+11. That is, 4N
'y' is the real part of the signal obtained by multiplying i=+4fx by the complex weight W.

以上のように本発明に係るサイドローブキャンセラでは
、相関ループの一部tベースバンド帯の工5 Q信号で
構成しているため、複素荷重wy求める際の低域フィル
タリングによっても位第11が損なわれる事なく安定な
#重ン得る事ができる。更に王個号1えと参照信号Xの
申)b周彼数か同一であるため1局部光振器(6J、ミ
キサ(7)、帯域フィルタ叫が不ツとなって1回路が簡
単化さ扛る1゜尚1本発明のサイドローブ・キャンセラ
における相関ループ構成法g、  MsN(Maxim
um  S/N)!ll仰構造ケ持つ、アタブディブ 
アレイ制御装置にも適用する事ができる。
As described above, in the sidelobe canceller according to the present invention, since a part of the correlation loop is composed of the 5Q signals in the baseband band, the 11th order is also impaired by low-pass filtering when calculating the complex weights wy. You can get stable #heavy weight without being affected. In addition, since the numbers of reference signals (X and B) are the same, one local optical oscillator (6J, mixer (7), and bandpass filter are no longer required), and one circuit is simplified. 1゜ Note 1 Correlation loop construction method g in the sidelobe canceller of the present invention, MsN (Maxim
um S/N)! Atabdibu with a supine structure
It can also be applied to array control devices.

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

第1図に工F帯における従来のサイドローブ・キャンセ
ラの回路構成図、第2図げ不発ゆjの1代分、Q成分の
2個の相関ループ7持つサイドローブ・キャンセラの回
路構成図である。 ト1において、 tlll’I王アンテナ、(21は補
助アンテナ、 +31. (6+は局部弁振器、 (4
i、 (51,171,(8+、 (illはミキサ、
 f9f、 (2団は加躊、器、 +101は帯域フィ
ルタ、 Q2は狭帯fi:フイ/ll’、 (141−
J帯域増幅器、 f+31. f+71. flEに相
関a、 (Ifil、 09fd低域7 (ルl 、 
C211,C22D師流増幅器: c::i、 a4+
は乗算器である。尚5図中同一あ(9〕 るいは相当部分には同一符号を付して示しである。 (10)
Figure 1 is a circuit diagram of a conventional sidelobe canceller in the F band, and Figure 2 is a circuit diagram of a sidelobe canceller with two correlation loops 7 for the Q component. be. In G1, tlll'I king antenna, (21 is auxiliary antenna, +31. (6+ is local valve oscillator, (4
i, (51,171, (8+, (ill is mixer,
f9f, (2 groups are filters, +101 is a bandpass filter, Q2 is a narrow band fi: fi/ll', (141-
J band amplifier, f+31. f+71. Correlation a, (Ifil, 09fd low range 7 (L,
C211, C22D downstream amplifier: c::i, a4+
is a multiplier. The same parts in Figure 5 are indicated by the same reference numerals (9) and (10).

Claims (1)

【特許請求の範囲】 王アンテナと、補助アンテナで受信された・ン信信号を
入力し、王アンテナのサイドローブ7j回から入射する
妨害波の影4i11を抑圧し、王アンテナのメインロー
プ力向から入IRをれた和波の影響による信号成分のみ
ケ残して出力するサイドローブ・キャンセラにおいて、
王アンテナと補助アンテナの受信4号の各々ン同一の中
間周波数(工F)し中心層#数として変調する回路と、
この変調−1路の出力における袖助アンテナからの信号
と、サイドローブ、キャンセラの出力信号ケ入力とする
相関器と、この相関器の出力信号を人力して増幅する狭
帯域の直流増幅器と、この直流増幅器のti3刀信号と
、袖助アンテナからの信−1’&入力とする乗算回路と
l肩し、この5P′11−請1路の出力として、第1の
補正信号ケ得ると共に、前記変調回路の出力における袖
助アンテナからの信号の直交成分ケとるだめの、90°
移相器と、この90°移相器からの出力信号と、サイド
ローブ・キャンセラの出力信号とン入力とする相関器と
、この相関器の出力信号な入力して増幅する狭帯域の直
流増幅器と、この直流増幅器の出力信号と、90°移相
器の出力信号とを人力とする乗算IP1M8とな有し、
その乗算回路の出力として、第2の補正信号乞得、更に
これと前述の第1の補正信号ン入力とする加算回路と。 その加算回路の出力信号1.前記変調回路の出力におけ
る王アンテナからの信号から減する減算回路とン有し、
この減算回路の出力信号ケ、サイドロープ・キャンセラ
の出力信号とすることにより。 二重のフィードバックルーズケ形成する事を特徴とする
サイドローブ・キャンセラ。
[Claims] Input the signal received by the king antenna and the auxiliary antenna, suppress the interference wave shadow 4i11 incident from the side lobe 7j of the king antenna, and direct the main rope force direction of the king antenna. In the sidelobe canceller, which outputs only the signal components due to the influence of the sum wave input from the IR,
A circuit that uses the same intermediate frequency (F) for each of the reception No. 4 of the main antenna and the auxiliary antenna and modulates it as a center layer # number;
A correlator which inputs the signal from the Sode auxiliary antenna at the output of this modulation-1 path, the side lobe, and the output signal of the canceller, and a narrow band DC amplifier which manually amplifies the output signal of this correlator. The ti3 signal of this DC amplifier is connected to the multiplier circuit which receives the signal from the Sode-suke antenna, and the first correction signal is obtained as the output of this 5P'11-1 path. 90° of the orthogonal component of the signal from the Sode-suke antenna at the output of the modulation circuit.
A phase shifter, a correlator which inputs the output signal from the 90° phase shifter and the output signal of the sidelobe canceller, and a narrowband DC amplifier which inputs and amplifies the output signal of the correlator. and a multiplier IP1M8 that manually uses the output signal of this DC amplifier and the output signal of the 90° phase shifter,
As an output of the multiplication circuit, a second correction signal is obtained, and an addition circuit which inputs this and the above-mentioned first correction signal. Output signal 1 of the adder circuit. a subtraction circuit for subtracting from the signal from the antenna at the output of the modulation circuit;
By using the output signal of this subtraction circuit as the output signal of the side rope canceller. A sidelobe canceller characterized by the formation of a double feedback loop.
JP57200592A 1982-11-16 1982-11-16 Side lobe canceller Granted JPS5990404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57200592A JPS5990404A (en) 1982-11-16 1982-11-16 Side lobe canceller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57200592A JPS5990404A (en) 1982-11-16 1982-11-16 Side lobe canceller

Publications (2)

Publication Number Publication Date
JPS5990404A true JPS5990404A (en) 1984-05-24
JPH0445793B2 JPH0445793B2 (en) 1992-07-27

Family

ID=16426909

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57200592A Granted JPS5990404A (en) 1982-11-16 1982-11-16 Side lobe canceller

Country Status (1)

Country Link
JP (1) JPS5990404A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5796278A (en) * 1980-10-17 1982-06-15 Hollandse Signaalapparaten Bv Disturbing signal cancelling method and apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5796278A (en) * 1980-10-17 1982-06-15 Hollandse Signaalapparaten Bv Disturbing signal cancelling method and apparatus

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JPH0445793B2 (en) 1992-07-27

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