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JPH0311561B2 - - Google Patents
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JPH0311561B2 - - Google Patents

Info

Publication number
JPH0311561B2
JPH0311561B2 JP1894782A JP1894782A JPH0311561B2 JP H0311561 B2 JPH0311561 B2 JP H0311561B2 JP 1894782 A JP1894782 A JP 1894782A JP 1894782 A JP1894782 A JP 1894782A JP H0311561 B2 JPH0311561 B2 JP H0311561B2
Authority
JP
Japan
Prior art keywords
antenna
interference
adaptive antenna
filter
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.)
Expired
Application number
JP1894782A
Other languages
Japanese (ja)
Other versions
JPS58137302A (en
Inventor
Tasuku Morooka
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP1894782A priority Critical patent/JPS58137302A/en
Publication of JPS58137302A publication Critical patent/JPS58137302A/en
Publication of JPH0311561B2 publication Critical patent/JPH0311561B2/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

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Description

【発明の詳細な説明】 [発明の技術分野] この発明は、妨害波が存在する電波環境で妨害
波を抑圧し、所望信号波のみを受信して受信出力
の信号対(妨害波+雑音)比SINRを最適にする
アダプテイブアンテナに関する。
[Detailed Description of the Invention] [Technical Field of the Invention] This invention suppresses interference waves in a radio wave environment where interference waves exist, receives only desired signal waves, and generates a received output signal pair (interference wave + noise). Concerning an adaptive antenna that optimizes the relative SINR.

[発明の技術的背景とその問題点] アダプテイブアンテナは第1図に示すように、
アンテナ素子1に付加された複素重み2をコント
ロール部3によつてコントロールしシステムの出
力4のS/Nを最大にする。妨害波が存在すると
きは、第2図に示す如く妨害波方向5に指向性の
零点6を形成することにより所望信号7のみを抽
出することができる。
[Technical background of the invention and its problems] As shown in Figure 1, the adaptive antenna is
A complex weight 2 added to the antenna element 1 is controlled by a control unit 3 to maximize the S/N of the system output 4. When interference waves are present, only the desired signal 7 can be extracted by forming a directional zero point 6 in the interference wave direction 5 as shown in FIG.

アダプテイブアンテナのうちパワーインバージ
ヨンアルゴリズム(Power Inversion
Algorithm)はMSNアルゴリズムに基く相関ル
ープを使つたアダプテイブアンテナの1つの方法
である。
Among adaptive antennas, power inversion algorithm (Power Inversion algorithm)
Algorithm) is one method of adaptive antenna using correlation loop based on MSN algorithm.

パワーインバージヨンアダプテイブアレーと呼
ばれるこの方法の構成を第3図に示す。アンテナ
素子1と複素重み付け器10、相関器11、合成
器12からなり、相関器には初期信号W1 p〜WN p
3が注入される。
The configuration of this method, called a power inversion adaptive array, is shown in FIG. It consists of an antenna element 1, a complex weighter 10, a correlator 11, and a combiner 12, and the correlator receives initial signals W 1 p to W N p 1
3 is injected.

このアダプテイブアンテナの構成は、MSNに
基くHowelles−Applebaumのループと全く同じ
であるが、初期信号W1 p〜WN pの与え方が異なつて
いる。W1 p〜WN pは、パワーインバージヨンアダプ
テイブアレー(以下P.I.A.A.)では(1,0,0
…0)のように設定される。これは初期状態では
1素子のみを働かせアレー指向性を無指向性とし
て信号がどの方向から到来しても受信できるよう
にしている。
The configuration of this adaptive antenna is exactly the same as the Howelles-Applebaum loop based on MSN, but the way the initial signals W 1 p to W N p are provided is different. W 1 p ~ W N p is (1,0,0
...0). In the initial state, only one element is activated and the array directivity is made omnidirectional so that signals can be received no matter which direction they come from.

この後、信号だけあるいは信号+妨害波が入力
されると相関ループが働き始める。このときのふ
るまいはR.T.Compton,JR“The Power−
Inversion Adaptive Array:Concept and
Performance”IEEE Trans.Vel AES−15
No6,Novemver 1979.に詳しいが、簡単に述べ
ると以下の通りである。
After this, when only the signal or the signal + interference wave is input, the correlation loop starts working. The behavior at this time is RTCompton, JR “The Power−
Inversion Adaptive Array:Concept and
Performance”IEEE Trans.Vel AES−15
No. 6, Novemver 1979. for details, but a brief explanation is as follows.

無指向性の素子アンテナが、半波長離れた2素
子アレーで、所望波がアンテナの正面方向(θ=
0゜)、妨害波がθ=50゜から到来したときのシステ
ム出力の信号対雑音+妨害波比を示したが第4図
である。第4図a,b,cの違いは相関ループ利
得Gを変えた場合で、K=Gx雑音電力をパラメ
ータとしている。aは利得が小、b,cにゆくに
従い利得が増加する場合を示す。第4図から、例
えば入力での信号対雑音比ξ(=入力信号/雑音)
が10dBで妨害波がほとんど存在しない入力妨害
波対雑音比ξi(=入力妨害/雑音)が−100dBの
場合、K=0.01ではSINR(=信号/(雑音+妨
害)が+10dB、K=0.1で3dB、K=1で−6dB
となる。これはKが大きすぎると信号を消去する
ためである。
The omnidirectional element antenna is a two-element array separated by a half wavelength, and the desired wave is directed toward the front of the antenna (θ=
Figure 4 shows the signal-to-noise+interference wave ratio of the system output when the interference wave arrives from θ=50°. The difference between a, b, and c in FIG. 4 is when the correlation loop gain G is changed, and K=Gx noise power is used as a parameter. A shows a case where the gain is small, and the gain increases as it goes to b and c. From Figure 4, for example, the signal-to-noise ratio ξ at the input (=input signal/noise)
is 10 dB and there is almost no interference. If the input interference-to-noise ratio ξi (= input interference/noise) is -100 dB, then at K = 0.01 the SINR (= signal / (noise + interference) is +10 dB, at K = 0.1 3dB, -6dB at K=1
becomes. This is because if K is too large, the signal will be erased.

一方、第4図からξd=10dB、ξi=20dBのとき
K=0.01でSINRが−3dB、K=0.1のとき6dB、
K=1で8dBである。妨害波が存在する場合Kが
小さいと妨害波を十分抑圧できないためにSINR
が劣化する。
On the other hand, from Fig. 4, when ξd = 10 dB and ξi = 20 dB, the SINR is -3 dB when K = 0.01, and 6 dB when K = 0.1.
When K=1, it is 8 dB. When interference waves exist, if K is small, the interference waves cannot be suppressed sufficiently, so the SINR
deteriorates.

上記のように妨害波によつてKを選択すること
は重要である。
As mentioned above, it is important to select K depending on the interference wave.

[発明の目的] 本発明は、このような点に鑑みてなされたもの
で、SINRをP.I.A.A.の動作範囲の中で効果的に
動作するアダプテイブアンテナを提供することを
目的とする。
[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to provide an adaptive antenna that effectively operates SINR within the operating range of PIAA.

[発明の概要] 本発明は、パワーインバージヨンアダプテイブ
アンテナにおいて、妨害波レベル検出によりルー
プ利得を変えてS/Nを最適にするアンテナであ
る。
[Summary of the Invention] The present invention is a power inversion adaptive antenna that optimizes the S/N by changing the loop gain by detecting the level of interference waves.

[発明の実施例] 第5図に本発明一実施例の構成を示す。これ
は、従来のP.I.A.A.にフイルター22、検出器2
3、コントロール24を付加し、アダプテイブア
ンテナの信号処理部中の利得Gを可変とするもの
である。フイルター22は、このP.I.A.A.の所望
帯域外を通すよう周波数設定されている。例えば
第6図に示すように所望帯域Bsに隣接するよう
にフイルターの帯域BNを設定する。
[Embodiment of the Invention] FIG. 5 shows the configuration of an embodiment of the present invention. This is a conventional PIAA with 22 filters and 2 detectors.
3. A control 24 is added to make the gain G in the signal processing section of the adaptive antenna variable. The frequency of the filter 22 is set to pass frequencies outside the desired band of this PIAA. For example, as shown in FIG. 6, the band BN of the filter is set so as to be adjacent to the desired band Bs.

妨害波は一般に帯域を持つており、所望帯域外
にも妨害波がある場合が多い。この場合フイルタ
ー22に妨害波のみが入力されることになる。し
たがつて、検出器23は妨害波のレベルを検出す
ることができる。コントロール部24は、アンテ
ナに入力された妨害波レベルの情報を得、信号処
理部11の利得Gを決定する。
Interference waves generally have a band, and there are many cases where there are interference waves outside the desired band. In this case, only interference waves will be input to the filter 22. Therefore, the detector 23 can detect the level of interference waves. The control section 24 obtains information on the level of interference waves input to the antenna, and determines the gain G of the signal processing section 11.

第4図の例のとき、ξi=20dB以下のときK=
0.01に対応する利得Gに設定し、ξi=20dB以上に
なつたときK=1とおけばξdの広いダイナミツ
クレンジにわたつてSINRをOdB以上にすること
ができる。
In the example of Fig. 4, when ξi = 20 dB or less, K =
By setting the gain G corresponding to 0.01 and setting K=1 when ξi=20 dB or more, it is possible to make the SINR more than O dB over a wide dynamic range of ξd.

尚、妨害波検出部はアダプテイブアンテナと共
有してもよく、また別のアンテナ素子によるもの
でもよい。
Note that the interference wave detection section may be shared with the adaptive antenna, or may be a separate antenna element.

[発明の効果] 以上述べたように本発明によれば帯域外の妨害
波レベルを検出し信号処理部の利得を選ぶことに
より、広いダイナミツクレンジにわたつてSINR
の良好なシステム出力を得ることが可能となる。
[Effects of the Invention] As described above, according to the present invention, by detecting the level of interference waves outside the band and selecting the gain of the signal processing section, the SINR can be improved over a wide dynamic range.
This makes it possible to obtain good system output.

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

第1図は一般のアダプテイブアンテナの構成
図、第2図はこのアンテナの指向性を示す図、第
3図はパワーインバージヨンアダプテイブアンテ
ナの構成図、第4図はパワーインパージヨンアダ
プテイブアンテナのふるまいを示す図、第5図は
本発明一実施例の構成を示す図、第6図はフイル
ターの応答の特性図である。 1……アンテナ素子、2……複素重み、3……
信号処理部、4……システム出力、5……妨害
波、6……指向性の零点、7……所望信号、10
……複素重み、11……信号処理部、12……合
成器、13……初期ウエイト、22……フイルタ
ー、23……検出器、24……コントロール部、
25……可変利得器。
Figure 1 is a configuration diagram of a general adaptive antenna, Figure 2 is a diagram showing the directivity of this antenna, Figure 3 is a configuration diagram of a power inversion adaptive antenna, and Figure 4 is a configuration diagram of a power inversion antenna. FIG. 5 is a diagram showing the behavior of the adaptive antenna, FIG. 5 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 6 is a characteristic diagram of the filter response. 1...Antenna element, 2...Complex weight, 3...
Signal processing unit, 4... System output, 5... Interfering wave, 6... Zero point of directivity, 7... Desired signal, 10
...Complex weight, 11...Signal processing unit, 12...Synthesizer, 13...Initial weight, 22...Filter, 23...Detector, 24...Control unit,
25...Variable gain unit.

Claims (1)

【特許請求の範囲】[Claims] 1 妨害波を抑圧し所望信号波のみを自動的に受
信するパワーインバージヨンアダプテイブアンテ
ナにおいて、アンテナ素子の1つに所望帯域に隣
接し、所望帯域の外の帯域を通すフイルター及び
フイルター出力の検出器を有し、検出器のレベル
から上記アダプテイブアンテナのループ利得をコ
ントロールするコントロール部を備えたことを特
徴とするアダプテイブアンテナ。
1. In a power inversion adaptive antenna that suppresses interference waves and automatically receives only desired signal waves, one of the antenna elements is equipped with a filter adjacent to the desired band and which passes bands outside the desired band, and a filter output from the filter. What is claimed is: 1. An adaptive antenna comprising: a detector; and a control section that controls the loop gain of the adaptive antenna based on the level of the detector.
JP1894782A 1982-02-10 1982-02-10 Adaptive antenna Granted JPS58137302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1894782A JPS58137302A (en) 1982-02-10 1982-02-10 Adaptive antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1894782A JPS58137302A (en) 1982-02-10 1982-02-10 Adaptive antenna

Publications (2)

Publication Number Publication Date
JPS58137302A JPS58137302A (en) 1983-08-15
JPH0311561B2 true JPH0311561B2 (en) 1991-02-18

Family

ID=11985836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1894782A Granted JPS58137302A (en) 1982-02-10 1982-02-10 Adaptive antenna

Country Status (1)

Country Link
JP (1) JPS58137302A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004523934A (en) 2000-10-10 2004-08-05 ブロードストーム テレコミュニケイションズ インコーポレイテッド Medium access control for orthogonal frequency division multiple access (OFDMA) cellular networks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004523934A (en) 2000-10-10 2004-08-05 ブロードストーム テレコミュニケイションズ インコーポレイテッド Medium access control for orthogonal frequency division multiple access (OFDMA) cellular networks

Also Published As

Publication number Publication date
JPS58137302A (en) 1983-08-15

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