JPH02268023A - Interference wave elimination device - Google Patents
Interference wave elimination deviceInfo
- Publication number
- JPH02268023A JPH02268023A JP1087986A JP8798689A JPH02268023A JP H02268023 A JPH02268023 A JP H02268023A JP 1087986 A JP1087986 A JP 1087986A JP 8798689 A JP8798689 A JP 8798689A JP H02268023 A JPH02268023 A JP H02268023A
- Authority
- JP
- Japan
- Prior art keywords
- interference wave
- output
- circuit
- amplitude
- signal
- 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
Links
- 230000008030 elimination Effects 0.000 title 1
- 238000003379 elimination reaction Methods 0.000 title 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005094 computer simulation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Radar Systems Or Details Thereof (AREA)
- Noise Elimination (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、通信機から電波を通信しつつ、近傍にある受
信機の受信を可能にする干渉波除去装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an interference wave removal device that allows radio waves to be received from a nearby receiver while transmitting radio waves from a communication device.
（従来の技術及び問題点）
従来、通信機等の受信機の近傍に通信機があるときは、
通信機からの干渉波が非常に大きいため、通信してい、
るときは受信を停止しなければならない場合がしばしば
あり、このため通信時にほとんど受信できない欠点があ
った。また、この欠点を改善するため、通信波を分波し
て干渉波との位相と振幅を調整して、干渉波を打ち消す
方法が考えられているが、位相と振幅を精度良く合わせ
ることがむずかしく、十分な除去能力を取ることができ
ない欠点があった。(Prior art and problems) Conventionally, when there is a communication device near a receiver such as a communication device,
The interference waves from the communication device are very large, so it is difficult to communicate.
When communicating, it is often necessary to stop reception, which has the disadvantage that it is almost impossible to receive data during communication. In addition, in order to improve this drawback, methods have been considered to cancel the interference waves by splitting the communication waves and adjusting the phase and amplitude of the interference waves, but it is difficult to precisely match the phase and amplitude. However, it had the drawback of not being able to provide sufficient removal ability.
（問題点を解決するための手段）
そこで本発明においては、受信機において、受信信号を
非線形処理部と線形処理部の各々に通す。(Means for Solving the Problems) Therefore, in the present invention, a received signal is passed through each of a nonlinear processing section and a linear processing section in a receiver.
この時、非線形処理部では信号成分の大きさと干渉波の
大きさの比が、入力端と出力端では変化するが、線形処
理部ではこの比は変化しないという原理を用いる。この
結果、この２つの処理部の出力の差を取って、干渉波を
より大きく取り除くよう利得を調整すればほとんど干渉
波を除去でき、信号成分のみを抽出できるものである。At this time, a principle is used in which the ratio between the magnitude of the signal component and the magnitude of the interference wave changes at the input end and the output end in the nonlinear processing section, but this ratio does not change in the linear processing section. As a result, by taking the difference between the outputs of these two processing sections and adjusting the gain to remove more interference waves, most of the interference waves can be removed and only the signal components can be extracted.
この構成により、干渉波は、干渉波の位相とは無関係に
、当該干渉波の量（強さ）と振幅波形情報のみに着目し
て調整してやれば取り除くことができ、大きな除去能力
のある干渉波除去装置を提供できるものである。With this configuration, interference waves can be removed by adjusting only the amount (intensity) and amplitude waveform information of the interference waves, regardless of the phase of the interference waves, and interference waves with a large removal ability can be removed. A removal device can be provided.
（実施例）
以下、本発明に係る干渉波除去装置の１実施例について
、構成及び動作原理を説明する。(Embodiment) Hereinafter, the configuration and operating principle of an embodiment of the interference wave removal device according to the present invention will be described.
実施例の回路の基本構成は第１図に示すように、線形処
理部としての線形回路１、非線形処理部としての非線形
回路２、帯域フィルタ３、変調回路（たとえば振幅変調
を行うもの）４、差回路５及び利得調整器６からなる。As shown in FIG. 1, the basic configuration of the circuit of the embodiment includes a linear circuit 1 as a linear processing section, a nonlinear circuit 2 as a nonlinear processing section, a bandpass filter 3, a modulation circuit (for example, one that performs amplitude modulation) 4, It consists of a difference circuit 5 and a gain adjuster 6.
干渉波除去装置への入力として、角周波数ω。As an input to the interference canceller, the angular frequency ω.
を中心とした信号成分と干渉波成分を与えたとすると、
入力＝ Ｘ （ｔ）＝ Ｓ （ｔ）ｃｏｓ（ω。ｔ＋θ
言ｔ）１十Ｎ （１，）ｃｏｓ（ω、１＋θＮ（ｔ）・
・・（１）
と表せる。ここでｓ （し）とθ、（ｔ）は信号成分の
振幅と位相であり、Ｎ （ｔ）とθＮ（ｔ）はそれぞれ
干渉波成分の振幅と位相である。非線形回路２どなる非
線形増幅器としてノ）−ド・リミ・ン夕を用りすると、
この入出力特性は
である。ここで、Ｙ（し）はバー１ｔ・リミッタの出力
である。出力Ｙ（し）は帯域通過フィルタにより、ω。If we give a signal component centered at and an interference wave component, then input = X (t) = S (t) cos(ω.
t) 10N (1,)cos(ω, 1+θN(t)・
...(1) It can be expressed as: Here, s (shi), θ, (t) are the amplitude and phase of the signal component, and N (t) and θN(t) are the amplitude and phase of the interference wave component, respectively. Nonlinear circuit 2 When using a nonlinear amplifier as a nonlinear amplifier,
This input/output characteristic is. Here, Y (shi) is the output of the bar 1t limiter. The output Y(shi) is passed through a bandpass filter to ω.
の近傍のみの基本成分を取り出す。このとき、帯域通過
フィルタの出力ＹＦ（ｔ）は、ＹＥ（ｔ）＝π・［Ｓ
（ｔ）ｃｏｓｔω。し＋θ、（ｔ）ｌ＋Ｎ（ｔ）Ｘｃｏ
ｓ（ωａｔ十θＮ（し））１／［４・／Ｓ２（し）十Ｎ
２（シ）＋ ２ Ｎ （ｔ） ・Ｓ （ｔ）ｃｏｓ（θ
、（Ｌ）−θＮ（ｔ）＋］・・・（３）
と成る。変調器４の出力ｙｌ、１（ｔ）は、ＹＦ（ｔ）
に干渉波の振幅Ｎ （ｔ）を掛けたものであるから、Ｙ
Ｆ（Ｌ）＝π・Ｎ（ｔ）・［Ｓ （ｔ）ｃｏｓｔω、１
＋θ５（ｔ）１十Ｎ （ｔ）ｃｏｓｆωｏし＋ θ、（
し））］／［４・ノー１畳１）−十Ｎ ２（ｔ）＋２
Ｎ （ｔ） ・Ｓ （ｔ）ｃｏｓｔθ、（し）−θＮ（
ｔ）ｌ］・・・（４）
したがって、実施例の回路の出力Ｚ（ｔ）は、ＹＦ（ｔ
）と線形回路である線形増幅器の出力との差であり、Ｚ
（Ｌ）＝［ｆｆ ・ Ｎ（ｔ＞／＋ −Ｅ”Ｃ〒了
−）Ｎ”（〒５十 ２ Ｎ （ｔ） ・ Ｓ （ｔ
）ｃｏｓ（θ、（シ）−θＮ（ｔ）ｌ−ＧＦ・［Ｓ （
ｔ）ｃｏｓｔω、１＋θ、 （ｔ）ｌ ＋Ｎ （ｔ）ｃ
ｏｓｔω、１＋θＮ（ｔ）＋１
・・・（５）のように表せる。ここでＧは線
形増幅器の利得である。Extract the fundamental components only in the vicinity of . At this time, the output YF(t) of the bandpass filter is YE(t)=π・[S
(t) costω. +θ, (t)l+N(t)Xco
s (ωat ten θN (shi)) 1/[4・/S2 (shi) ten N
2(shi)+2N(t)・S(t)cos(θ
, (L)-θN(t)+] (3). The output yl,1(t) of the modulator 4 is YF(t)
is multiplied by the amplitude N (t) of the interference wave, so Y
F(L)=π・N(t)・[S(t)costω, 1
+θ5(t)10N (t)cosfωo+θ, (
shi))]/[4・No 1 tatami 1) - 10N 2(t)+2
N (t) ・S (t) cost θ, (shi) − θN (
t)l]...(4) Therefore, the output Z(t) of the circuit of the embodiment is YF(t
) and the output of a linear amplifier, which is a linear circuit, and Z
(L)=[ff ・N(t>/+ −E”C〒complete−)N”(〒50 2 N (t) ・S (t
)cos(θ, (shi)-θN(t)l-GF・[S (
t) costω, 1+θ, (t)l +N (t)c
ostω, 1+θN(t)+1
...It can be expressed as (5). Here G is the gain of the linear amplifier.
さて、干渉波が信号成分に比較して非常に大きいとき、
すなわち、
Ｎ （ｔ）＞ ＞ Ｓ （Ｌ） ・
・・（６）では、（５）式は近似的に
Ｚ（し）＝（π／４−Ｇ） ・ Ｎ（し）・ ｃｏｓ
（ω 。ｔ＋θＮ（ｔ）１＋（π／８−Ｇ）・Ｓ （
ｔ）ｃｏｓ［ωｏｔ＋ θ５（ｔ）ｌ＋ π／ ８
・ Ｓ （ｔ）ｃｏｓ［ωＯｔ＋ ２ θＮ（ｔ）−
θ言ｔ）ｌ ・・・（７
）となる。もし線形増幅器の利得をπ／４に調整したな
らば出力Ｚ（ｔ）は、
Ｚ（Ｌ）＝ −π／ ８ ・ Ｓ （ｔ）ｃｏｓ（ω
、１＋ θ、（Ｌ月十π／ ８− Ｓ （ｔ）ｃｏｓ（
ω、ｔ＋２θＮ（ｔ）−θ５（ｔ）１・・・（８）
となり、信号成分は（８）式の右辺の第１項である。Now, when the interference wave is very large compared to the signal component,
That is, N (t)>>S (L)・
...(6), equation (5) is approximately Z(shi)=(π/4-G)・N(shi)・cos
(ω.t+θN(t)1+(π/8-G)・S (
t) cos[ωot+ θ5(t)l+ π/ 8
・S (t)cos[ωOt+ 2 θN(t)−
θwordt)l...(7
). If the gain of the linear amplifier is adjusted to π/4, the output Z(t) will be Z(L)=-π/8 ・S(t)cos(ω
, 1+ θ, (L month 1π/ 8− S (t)cos(
ω,t+2θN(t)−θ5(t)1 (8) The signal component is the first term on the right side of equation (8).
この結果、千′０波はほとんど除去されることがわかる
。As a result, it can be seen that most of the 1,000'0 waves are removed.
第２図は実施例に示す回路をコンピュータでシミュレー
ションした場合の結果である。第２図の７は入力の信号
成分の振幅波形、８は干渉波の振幅波形であり、これら
の信号の大きさの比は６０ｄＢはど干渉波の方が大きい
。このような入力に対する回路の出力を第２図の９に示
す。この出力の振幅波形が示すように干渉波がほとんど
除去されていることが解る。FIG. 2 shows the results of a computer simulation of the circuit shown in the example. In FIG. 2, 7 is the amplitude waveform of the input signal component, and 8 is the amplitude waveform of the interference wave, and the ratio of the magnitudes of these signals is 60 dB, which is larger for the interference wave. The output of the circuit for such an input is shown at 9 in FIG. As shown by the amplitude waveform of this output, it can be seen that most of the interference waves have been removed.
また、本発明の他の実施例として、入力Ｘ（し）を、角
周波数ω。で検波して、直交する２つの成分で表し、こ
れをＡ／Ｄ変換した後、デジタル処理で実施することも
可能である。第３図はこのための回路例を示したもので
ある。この場合、角周波数ω。の局部発振器１０とπ／
２位相器１１を用いて、入力Ｘ（し）を検波器（ローパ
スフィルタ１７゜Ｐ、Ｆ、内ａ）１２で検波して、直交
する２つの成分■とＱ信号に分離し、これらの信号をＡ
／Ｄ変換器１３でディジタル信号とする。そして、これ
らのディジタル信号を用いて信号処理器１４で前述の第
１図の実施例で示した処理を行っても、本発明の実施が
可能である。In another embodiment of the present invention, the input X is set to an angular frequency ω. It is also possible to perform digital processing after detecting the waveform and expressing it as two orthogonal components and A/D converting it. FIG. 3 shows an example of a circuit for this purpose. In this case, the angular frequency ω. local oscillator 10 and π/
Using the two-phase shifter 11, the input A
/D converter 13 converts the signal into a digital signal. The present invention can also be carried out by using these digital signals and performing the processing shown in the above-described embodiment of FIG. 1 in the signal processor 14.
（発明の効果）
以上説明したように、本発明によれば、干渉波の大きさ
く又は振幅）について制御するだけで、干渉波に埋もれ
た信号を抽出可能な優れた干渉波除去装置を得ることが
できる。(Effects of the Invention) As explained above, according to the present invention, it is possible to obtain an excellent interference wave removal device capable of extracting a signal buried in interference waves by simply controlling the size or amplitude of the interference waves. I can do it.
第１図は本発明に係る干渉波除去装置の１実施例を示す
構成図、第２図はフンピユータで回路をシミュレーショ
ンしたときに用いた入力信号とこのときの出力信号とを
示す波形図、第３図は本発明の他の実施例の構成図であ
る。
１・・・線形回路、２・・・非線形回路、３・・・帯域
フィルタ、４・・・変調回路、５・・・差回路、６・・
・利得制御器、７・・・信号の振幅波形、８・・・干渉
波の振幅波形、９・・・出力波形、１０・・・局部発振
器、１１・・・位相器、１２・・・検波器、１３・・・
Ａ／Ｄ変換器、１４・・・信号処理器。
第２図
第１図
第３図FIG. 1 is a configuration diagram showing one embodiment of the interference wave removal device according to the present invention, FIG. FIG. 3 is a block diagram of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Linear circuit, 2...Nonlinear circuit, 3...Band filter, 4...Modulation circuit, 5...Difference circuit, 6...
・Gain controller, 7... Signal amplitude waveform, 8... Interference wave amplitude waveform, 9... Output waveform, 10... Local oscillator, 11... Phase shifter, 12... Detection Vessel, 13...
A/D converter, 14... signal processor. Figure 2 Figure 1 Figure 3
Claims (1)
非線形処理部に通過させ、その出力を干渉波の振幅波形
情報で変調し、かつ、干渉波の量で可変する利得調整部
で出力振幅情報を制御したものと、前記受信信号を線形
処理部に通過させたものとの差を取ることにより、干渉
波を除去することを特徴とする干渉波除去装置。(1) In a receiver such as a radar or communication device, the received signal is passed through a nonlinear processing section, its output is modulated by the amplitude waveform information of the interference wave, and is output by a gain adjustment section that varies depending on the amount of interference wave. An interference wave removal device characterized in that the interference wave is removed by taking the difference between the amplitude information controlled signal and the received signal passed through a linear processing section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1087986A JPH0761024B2 (en) | 1989-04-10 | 1989-04-10 | Interference wave remover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1087986A JPH0761024B2 (en) | 1989-04-10 | 1989-04-10 | Interference wave remover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02268023A true JPH02268023A (en) | 1990-11-01 |
| JPH0761024B2 JPH0761024B2 (en) | 1995-06-28 |
Family
ID=13930138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1087986A Expired - Lifetime JPH0761024B2 (en) | 1989-04-10 | 1989-04-10 | Interference wave remover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0761024B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6151373A (en) * | 1997-04-03 | 2000-11-21 | At&T Corp. | Weak signal resolver |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60122A (en) * | 1983-06-16 | 1985-01-05 | Tech Res & Dev Inst Of Japan Def Agency | S/n improving circuit |
-
1989
- 1989-04-10 JP JP1087986A patent/JPH0761024B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60122A (en) * | 1983-06-16 | 1985-01-05 | Tech Res & Dev Inst Of Japan Def Agency | S/n improving circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6151373A (en) * | 1997-04-03 | 2000-11-21 | At&T Corp. | Weak signal resolver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0761024B2 (en) | 1995-06-28 |
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