JP3616375B2

JP3616375B2 - Multiple access communication device

Info

Publication number: JP3616375B2
Application number: JP2002018240A
Authority: JP
Inventors: 嘉彦竹内; 幸治吹野
Original assignee: Japan Radio Co Ltd
Current assignee: Japan Radio Co Ltd
Priority date: 2002-01-28
Filing date: 2002-01-28
Publication date: 2005-02-02
Anticipated expiration: 2022-01-28
Also published as: JP2003218760A

Description

【０００１】
【発明の属する技術分野】
本発明は多元接続通信装置に関し、特にアレイ・アンテナを採用して多元接続可能な複数の個別の通信経路毎に送受信方向が設定できるようにしたＣＤＭＡ方式等による多元接続通信装置に関する。
【０００２】
【従来の技術】
複数のアンテナ素子が配列されたアレイ・アンテナを採用して、多元接続可能な複数の個別の通信経路毎に送受信ができるようにした、従来の最も基本的な多元接続通信装置としては、アレイ・アンテナの複数のアンテナ素子それぞれに、送受信共用器を介して、送信機及び受信機を接続した構成のものがある。
【０００３】
このような構成の多元接続通信装置では、これら送信機間、受信機間における振幅特性及び位相特性の個別的、経時的な差が生じて、指向性等に悪影響を与え、送信電力の低減効果や、通信間干渉の低減効果が十分引き出せない、という問題点がある。
【０００４】
そこで、本願発明者らは、図４及び図５に示すような、複数のアンテナ素子それぞれと対応して、その送受信信号に対し振幅及び位相の制御が可能な、振幅・位相制御送受信部を備えた多元接続通信装置を提案した（特願２０００−５８９８３号）。
【０００５】
この従来例（以下、従来の、第１の例という）では、複数のアンテナ素子１１それぞれと対応接続する振幅・位相制御送受信部３０ｘに、参照信号を基準にして制御される、送信系及び受信系の振幅・位相制御器（３１，３７）を備えているので、送信系及び受信系に対する信号の振幅及び位相の制御が可能である。しかしながら、その、参照信号導入部８４、送信参照信号導出部８５、及び較正信号発生保持器７０に、送信系と受信系とを切換えるための切換器Ｓ１〜Ｓ６が含まれており、その切換動作による雑音、回路誤動作等の不具合や、振幅、位相制御動作の時間が長くなる、等の問題点があった。
【０００６】
この問題点を解決して、切換器をなくして雑音や回路誤動作の原因を除去すると同時に、回路の簡素化をはかり、かつ、送受同時に振幅位相制御動作ができて、その全体の動作時間を短縮することができる多元接続通信装置を、本願発明者らは提案した（特願２０００−２７１０３７号、従来の第２の例）。その振幅・位相制御送受信部３０ｙ（３０ｘ改）のブロック図を図６に示す。
【０００７】
この従来の第２の例では、参照信号導入部８４ｙ及び送信参照信号導出部８５ｙから切換器がなくなり、また、従来の第１の例の較正信号発生保持器７０に代えて、切換器を含まない、送受別々の２つの誤差検出器６１，６２が設けられており、また、送信系及び受信系が同時進行できるように、遅延器６０が設けられている。
【０００８】
この第２の例では、参照信号導入部８４ｙが、周波数変換器８４１、方向性結合器８４２、加算器８４３、及び減衰器８４４で構成され、また、送信参照信号導出部８５ｙが、周波数変換器８５１、方向性結合器８５２、及び減衰器８５３で構成されている。
【０００９】
また、アレイ・アンテナを備えた多元接続通信装置において、その振幅・位相制御送受信部の、受信系及び送信系に、受信信号電力に対応して受信利得を調整する受信側の可変利得増幅器（一般的には、受信機内に含まれる）、及び、無線機として状況に応じた送信電力を設定するための、送信側の可変利得増幅器（同様に、送信機内に含まれる）を含む場合がある。このような場合には、これら可変利得増幅器の利得に応じた電力の参照信号を導入する必要がある。このような機能を有する多元接続通信装置として、本願発明者らによる文献、信学技報ＲＣ２０００−３１「ＤＳ−ＣＤＭＡにおけるアレイアンテナ無線部のＬＭＳアルゴリズムを用いた自動校正法」に記載された構成のものがある。その受信系のブロック図及び送受信系のブロック図を図７（ａ），（ｂ）に示す（以下、従来の、第３の例という）。
【００１０】
この第３の例では、受信系の参照信号ｄｒは、振幅レベル検出器３９ｚにより検出された出力信号ＲＸのレベルに応じて減衰量が決定される、可変減衰器８４５を通して、アンテナ素子１１につながる無線周波帯信号の伝送線路から、受信系へと入力される。また、送信系の参照信号には、送信情報信号ＴＸそのものが用いられ、この送信系の参照信号ＴＸは、送信側振幅・位相制御器３１、送信器３２、送受信共用器３３、及びアンテナ素子１１へとつながる無線周波帯信号の伝送線路を経由して、この伝送線路から方向性結合器８５２により抽出され、送信電力制御部６３ｚにより減衰量が制御される可変減衰器８５５を通して、方向性結合器８４２を介して再び無線周波帯信号の伝送線路から、校正済みの受信系へと入力される。
【００１１】
この第３の例の構成に従えば、送信系及び受信系に可変利得増幅器を含む場合でも、受信系の校正（較正とも書く）、及び送信系の校正を、これら回路を切換えて順次行うことができ、かつその参照信号のレベルを、適正なレベルにして行うことができる。
【００１２】
【発明が解決しようとする課題】
上述した従来の多元接続通信装置は、その第１の例では、参照信号を基準にして制御される、送信側振幅・位相制御器３１及び受信側振幅・位相制御器３７を備えており、送信系及び受信系に対する信号の振幅及び位相の制御が可能であり、送信電力を低減し、かつ通信間干渉を低減することができるが、これら振幅、位相制御のための較正信号ｗを生成するに必要な、参照信号導入部８４ｘ、送信参照信号導入部８５ｘ、及び較正信号発生保持部７０に、受信系の校正動作と送信系の校正動作とを切換えるための切換器Ｓ１〜Ｓ６を備えているので、その切換動作による雑音、回路誤動作等の不具合や、振幅、位相制御動作の時間が長くなる、という問題点があり、この問題点を解決すべく成された第２の例では、較正信号発生保持器７０に代えて、受信系、送信系で別々に、切換器のない誤差検出器６１、誤差検出器６２を設け、かつ、受信系及び送信系の校正が同時進行可能なように遅延器６０を設けて受信系、送信系の校正が並行して行えるようにし、かつ参照信号導入部８４ｙ及び送信参照信号導出部８５ｙから切換器を無くした構成となっている。
【００１３】
しかしながら、このような多元接続通信装置においては、受信系に、受信信号電力に対応して受信利得を調整する可変利得増幅器、送信系に、無線機として状況に応じた送信電力を設定するための可変利得増幅器を含む場合があり、この場合には、これら可変利得増幅器の利得に応じた電力の参照信号を導入する必要があって、参照信号の導出、導入部分に、可変減衰器（８４５，８５５）を用いた第３の例が発表されているが、この第３の例では、受信系の校正を行った後、送信系に切換えて、送信系の校正を行うようになっており、受信系の校正と送信系の校正とを同時に並行して実施することができない、という問題点や、受信系、送信系で交互に可変減衰器８４５，８５５を切換える際の切換え時に、その減衰量の差に応じた不要信号が発生する危険性がある、という問題点がある。
【００１４】
本発明の目的は、上記従来技術の問題点に鑑みて、受信系及び送信系に可変利得増幅器を含む場合であっても、受信系の校正及び送信系の校正を、適正なレベルの参照信号により、かつ切換え動作なくこれらを並行して実施することができて、回路誤動作や雑音及び不要信号の発生を無くし、かつ校正時間を短縮することができる多元接続通信装置を提供することにある。
【００１５】
【課題を解決するための手段】
本発明の多元接続通信装置は、複数のアンテナ素子が配列されたアレイ・アンテナを用いて、多元接続可能な複数の個別の通信経路それぞれに対し、送信電波の送信方向、及び送られて来た電波に対する受信方向を設定して通信を行う多元接続通信装置であって、次の各構成を有することを特徴とする。
（イ）前記アレイ・アンテナの複数のアンテナ素子それぞれと対応して設けられ、前記複数の個別の通信経路それぞれの送信情報信号を、前記無線周波帯の送信信号に変換処理して対応するアンテナ素子に供給する、出力レベルが制御可能の送信機
（ロ）前記アレイ・アンテナの複数のアンテナ素子それぞれと対応して設けられ、対応するアンテナ素子からの無線周波帯の受信信号を、前記複数の個別の通信経路それぞれの受信情報信号に変換処理し、かつその出力レベルが一定化するように利得制御される、可変利得増幅型の受信機
（ハ）前記送信情報信号及び受信情報信号の周波帯と同一の周波帯を有する受信系の参照信号を、受信系制御用局部発振信号に基づいて前記無線周波帯の受信信号と同一の周波帯の信号に変換し、かつその信号レベルを、対応する受信機の利得と対応する値の減衰量で減衰させて設定し、対応する無線周波帯受信信号伝送路に導入する、受信参照信号レベル設定・参照信号導入部
（ニ）前記受信系の参照信号導入部分から、対応する受信機を経由してその受信情報信号の出力端に至るまでの受信系信号経路における、前記受信系の参照信号に対する振幅特性及び位相特性を、前記受信系信号経路の受信情報信号出力端近傍の信号と、前記受信系の参照信号のその導入部分の信号との間の差の情報に基づいて制御し、かつこの受信情報信号出力端の信号中の受信系の参照信号部分を除去する、受信系振幅位相制御・参照信号除去手段
（ホ）前記受信系の参照信号との間の相関係数が十分小さい送信系の参照信号を、前記送信機の送信情報信号入力端に印加し、この送信機で無線周波帯の送信信号と同一の周波帯の信号に変換処理して対応するアンテナ素子に供給し、この対応するアンテナ素子への送信信号伝送路から、無線周波帯の送信系の参照信号を導き出して送信系制御用局部発振信号に基づいて無線周波帯の受信信号と同一の周波帯に変換し、かつその信号レベルを、前記送信機の出力信号レベルと対応する値の減衰量で減衰させて設定する、送信参照信号導出・レベル設定部を含み、前記送信系の参照信号を、対応するアンテナ素子の受信信号伝送路に導入、供給して、前記送信情報信号の入力端から、前記アンテナ素子への送信信号伝送路の参照信号導出部分に至るまでの送信系信号経路における前記送信系の参照信号に対する振幅特性及び位相特性を、前記送信情報信号の入力端の信号と前記参照信号導出部分の出力端の信号との間の差の情報に基づいて制御し、かつ前記受信情報信号出力端の信号中の送信系の参照信号成分を除去する、送信系振幅位相制御・参照信号除去手段
【００１６】
また、前記送信系振幅位相制御・参照信号除去手段における、送信参照信号導出・レベル設定部からの送信系の参照信号の、対応するアンテナ素子の受信信号伝送路への導入が、前記受信参照信号レベル設定・参照信号導入部の、受信参照信号レベル設定部分を経由して行われる構成である、構成を有している。
【００１７】
また、前記受信参照信号レベル設定・参照信号導入部が、前記受信系信号経路の受信情報信号の出力端のレベルに応じてその減衰量が設定されて、前記受信系の参照信号の、受信信号伝送路への導入レベルを設定する、受信側の可変減衰器を備えて構成され、前記送信参照信号導出・レベル設定導入部が、前記送信機の出力信号レベルに応じてその減衰量が設定されて、前記送信系の参照信号の、受信信号伝送路への導入レベルを設定する、送信側の可変減衰器を備えた構成を有している。
【００１８】
更に、前記受信系の参照信号のレベル、及び前記送信系の参照信号のレベルが、前記受信参照信号レベル設定・参照信号導入部内の受信側の可変減衰器入力端で同程度のレベルとなるようにした、構成を有している。
【００１９】
【発明の実施の形態】
本発明の一実施の形態は、複数のアンテナ素子が配列されたアレイ・アンテナを用いて、多元接続可能な複数の個別の通信経路それぞれに対し、送信電波の送信方向、及び送られて来た電波に対する受信方向を設定して通信を行う多元接続通信装置であって、複数のアンテナ素子それぞれと対応して、送信機、受信機、受信参照信号レベル設定・参照信号導入部、受信系振幅位相制御・参照信号除去手段、及び送信参照信号導出・レベル設定導入部を含む送信系振幅位相制御・参照信号除去手段を備えて成り、これら各部の詳細は次のとおりである。
【００２０】
送信機は、上記アレイ・アンテナの複数のアンテナ素子それぞれと対応して設けられ、上記複数の個別の通信経路それぞれの送信情報信号を、上記無線周波帯の送信信号に変換処理して対応するアンテナ素子に供給する、出力レベルが制御可能の構成となっている。
【００２１】
受信機は、上記アレイ・アンテナの複数のアンテナ素子それぞれと対応して設けられ、対応するアンテナ素子からの無線周波帯の受信信号を、上記複数の個別の通信経路それぞれの受信情報信号に変換処理し、かつその出力レベルが一定化するように利得制御される、可変利得増幅型の構成となっている。
【００２２】
受信参照信号レベル設定・参照信号導入部は、上記送信情報信号及び受信情報信号の周波帯と同一の周波帯を有する受信系の参照信号を、受信系制御用局部発振信号に基づいて上記無線周波帯の受信信号と同一の周波帯の信号に変換し、かつその信号レベルを、対応する受信機の利得と対応する値の減衰量で減衰させて設定し、対応する無線周波帯受信信号伝送路に導入する。
【００２３】
受信系振幅位相制御・参照信号除去手段は、上記受信系の参照信号導入部分から、対応する受信機を経由してその受信情報信号の出力端に至るまでの受信系信号経路における、上記受信系の参照信号に対する振幅特性及び位相特性を、上記受信系信号経路の受信情報信号出力端近傍の信号と、上記受信系の参照信号のその導入部分の信号との間の差の情報に基づいて制御し、かつこの受信情報信号出力端の信号中の受信系の参照信号部分を除去する。
【００２４】
送信系振幅位相制御・参照信号除去手段は、上記受信系の参照信号との間の相関係数が十分小さい送信系の参照信号を、上記送信機の送信情報信号入力端に印加し、この送信機で無線周波帯の送信信号と同一の周波帯の信号に変換処理して対応するアンテナ素子に供給し、この対応するアンテナ素子への送信信号伝送路から、無線周波帯の送信系の参照信号を導き出して送信系制御用局部発振信号に基づいて無線周波帯の受信信号と同一の周波帯に変換し、かつその信号レベルを、上記送信機の出力信号レベルと対応する値の減衰量で減衰させて設定する、送信参照信号導出・レベル設定部を含み、上記送信系の参照信号を、対応するアンテナ素子の受信信号伝送路に導入、供給して、上記送信情報信号の入力端から、上記アンテナ素子への送信信号伝送路の参照信号導出部分に至るまでの送信系信号経路における上記送信系の参照信号に対する振幅特性及び位相特性を、上記送信情報信号の入力端の信号と上記参照信号導出部分の出力端の信号との間の差の情報に基づいて制御し、かつ上記受信情報信号出力端の信号中の送信系の参照信号成分を除去する。
【００２５】
このような構成とすることにより、送信機及び受信機が出力レベル制御型、可変利得制御型であっても、送信系の校正及び受信系の校正を、切換え動作なく、これらを並行して実施することができ、かつ送信信号レベルに応じて、また時々刻々変化する利得に応じて可変減衰器の減衰量を制御し、参照信号のレベルを適正なレベルとして行うことができて、回路誤動作の発生や、雑音及び不要信号の発生を無くし、校正時間を短縮することができる。
【００２６】
また、上記送信系振幅位相制御・参照信号除去手段における、送信参照信号導出・レベル設定部からの送信系の参照信号の、対応するアンテナ素子の受信信号伝送路への導入が、上記受信参照信号レベル設定・参照信号導入部の、受信参照信号レベル設定部分を経由して行われる構成とし、また、上記受信参照信号レベル設定・参照信号導入部が、上記受信系信号経路の受信情報信号の出力端のレベルに応じてその減衰量が設定されて、上記受信系の参照信号の、受信信号伝送路への導入レベルを設定する、受信側の可変減衰器を備えて構成され、上記送信参照信号導出・レベル設定導入部が、上記送信機の出力信号レベルに応じてその減衰量が設定されて、上記送信系の参照信号の、受信信号伝送路への導入レベルを設定する、送信側の可変減衰器を備えた構成とすることにより、これら可変減衰器は、送信系及び受信系それぞれの、時々刻々変化する信号レベル、増幅利得に応じてその減衰量を変化させ、これら可変減衰器の変化量のステップサイズを少なくすることができて、利得変化、従って減衰量の変化に伴う不要信号の発生を抑えることができる上、送信系の校正動作が、校正済みの受信系回路を経由して行うことができて、より円滑に行うことができる。
【００２７】
また、上記受信系の参照信号のレベル、及び上記送信系の参照信号のレベルが、上記受信参照信号レベル設定・参照信号導入部内の受信側の可変減衰器入力端で同程度のレベルとなるようにした、構成とすることにより、送信系の参照信号が受信系回路を通る際、この受信系回路に対し最適な信号レベルとなるので、送信系及び受信系の校正を並行して行っても、これら相互間で他方の校正動作に対する妨害となることなく、校正動作を行うことができる。
【００２８】
【実施例】
次に本発明の実施例について図面を参照して説明する。
図１は本発明の一実施例を示す多元接続通信装置全体のブロック図、図２はその各振幅・位相制御送受信部内の回路ブロック図である。
この実施例の振幅・位相制御送受信部３０が、図６に示された従来の第２の例の振幅・位相制御送受信部３０ｙと相違する点は、従来の第２の例では、送信機３２ｘ及び受信機３６ｘが、可変利得型であるか否かが明確でないのに対し、図２では、送信機３２が、送信電力制御部６３によりその出力レベルが制御され、受信機３６が、振幅レベル検出器３９によりその利得が制御される可変利得型となっている点と、従来の送信参照信号導出部８５ｙに代えて、送信電力制御部６３により減衰量が制御される送信側の可変減衰器３５３を含み、この可変減衰器３５３で送信参照信号のレベルを設定する送信参照信号導出・レベル設定部３５が設けられ、従来の参照信号導入部８４ｙに代えて、振幅レベル制御部３９により減衰量が制御される受信側の可変減衰器３４４を含み、この可変減衰器３４４で受信系の参照信号のレベルを設定して受信系へ導入すると同時に、送信参照信号もこの可変減衰器３４４を通過させて受信系へ導入する、受信参照信号レベル設定・参照信号導入部３４が設けられている点である。
【００２９】
この実施例では、受信側の参照信号が、そのレベルを、振幅レベル検出器３９及び受信側の可変減衰器３４４により、受信機３６の増幅利得と対応した値の減衰量（すなわち、可変減衰器３４４の利得（減衰量の逆数）と、受信器３６の増幅利得との積が一定となるような）で減衰させて、受信系回路に導入される。また、送信側の参照信号は、そのレベルが送信電力制御部６３及び送信側の可変減衰器３５３により、送信機３２の増幅利得、出力信号レベルと対応した値の減衰量（可変減衰器３５３の利得と送信機３２の増幅利得との積が一定となるような）で減衰させて、校正済みの受信系回路に導入される。
【００３０】
従って、受信系回路を経由する受信系の参照信号は、そのレベルが、受信系の利得が変化しても、受信系回路の各部において適正レベルとなっていて、受信系回路の校正を正常に行うことができる。
また、送信系回路を経由する送信系の参照信号は、この送信系回路の入力端に、送信信号と見合ったレベルで入力され、かつ、この参照信号は、校正済みの受信系回路を適正レベルで経由して行われるので、送信系に関する校正も同様に、正常に行うことができる。
【００３１】
更に、受信系及び送信系（受信系を含む）の校正は、切換え動作なく、かつ互いに干渉することなく、並行して同時に実施されるので、回路誤動作が発生することもなく、また、雑音や不要信号が発生することもなく、正常に行うことができて、校正時間を短縮することができる。また、受信系及び送信系それぞれに対応して可変減衰器が設けられ、これら可変減衰器は、受信系及び送信系の利得の変動速度に対応してその減衰量が変化するので、これら可変減衰器の変化量のステップサイズを少なくすることができ、急激な減衰量の変化に伴う不要信号の発生を防ぐことができる。
【００３２】
また、この実施例において、送信系の参照信号のレベル、及び受信系の参照信号のレベルを、受信系の可変減衰器３４４の入力端でほぼ同一のレベルとして、これら送信系の参照信号及び受信系の参照信号間で、他方の校正動作に対する妨害が発生することはなく、それぞれの校正が正常に行われるようにしているが、相互の妨害がない範囲で、レベルを変えてもよい。
【００３３】
なお、この実施例では、送信参照信号導出・レベル設定部３５において、方向性結合器３５２からの信号を直ちに、可変減衰器３５３で減衰させた後、周波数変換器３５１で周波数変換する構成となっているが、図３に示すように、方向性結合器３５２からの信号を、まず、周波数変換器３５１で周波数変換した後、可変減衰器３５３で減衰させるようにしてもよい。
【００３４】
また、受信系及び送信系の参照信号の、受信系回路入力端（アンテナ素子１１と送受信共用器３３との間の伝送線路）への入力レベルは、各部の非線形性により、最終段の参照信号除去器３８で完全に除去できない場合も想定されるので、無線周波帯の受信信号のレベルに対し、１／１００程度とすることが望ましい。
【００３５】
【発明の効果】
以上説明したように本発明は、受信系回路及び送信系回路が可変利得増幅器を含む場合に、受信系の参照信号のレベルを決定してこの参照信号を受信系回路に導入する、受信参照信号レベル設定・参照信号導入部に、その参照信号のレベルを、受信系回路の増幅利得と対応する値の減衰量で減衰させる受信側の可変減衰器を含み、送信系を経由した送信系の参照信号を導出してその受信系回路への導入レベルを決定する、送信参照信号導出・レベル設定部に、その参照信号のレベルを、送信機の出力信号のレベル、増幅利得と対応する値の減衰量で減衰させる送信側の可変減衰器を含む、構成とし、かつこれらが並行して行われる構成とすることにより、受信系回路の増幅利得に応じて、また、送信出力レベルに応じてこれら参照信号の受信系回路への導入レベルを適正なレベルとすることができて、回路誤動作の発生や、雑音及び不要信号の発生を無くし正常に校正動作を行うことができ、かつ校正時間も短縮することができる、という効果があり、レベル設定された送信系の参照信号を、受信系参照信号レベル設定部を経由して受信系回路に導入する校正とすることにより、送信系の参照信号の受信系回路における信号レベルを適正レベルとすることができ、その校正動作を、より円滑に行うことができる、という効果があり、また送信系及び受信系の参照信号のレベルを、受信系回路への導入端で同程度のレベルとすることにより、互いに干渉し合うことなく、両者の校正を正常かつ円滑に進めることができる、という効果がある。
【図面の簡単な説明】
【図１】本発明の一実施例を示す装置全体のブロック図である。
【図２】図１に示された実施例の、振幅・位相制御送受信部の回路ブロック図である。
【図３】図２に示された振幅・位相制御送受信部における、送信参照信号導出・レベル設定部の、他の回路ブロック構成を示す図である。
【図４】従来の多元接続通信装置の第１の例の、装置全体のブロック図である。
【図５】図４に示された多元接続通信装置における、振幅・位相制御送受信部の回路ブロック図である。
【図６】従来の多元接続通信装置の第２の例における、振幅・位相制御送受信部の回路ブロック図である。
【図７】従来の多元接続通信装置の第３の例における、受信系校正動作、及び校正済受信系回路を含む送信系校正動作を説明するための回路ブロック図である。
【符号の説明】
１０アレイ・アンテナ
１１アンテナ素子
３０，３０ｘ，３０ｙ振幅・位相制御送受信部
３１送信側振幅・位相制御器
３２，３２ｘ送信機
３３送受信共用器
３４受信参照信号レベル設定・参照信号導入部
３５，３５ａ送信参照信号導出・レベル設定部
３６，３６ｘ受信機
３７受信側振幅・位相制御器
３８，３８ｒ，３８ｔ，３８ｘ参照信号除去器
３９，３９ｚ振幅レベル検出器
６０遅延器
６１，６１ｚ，６２，６２ｚ誤差検出器
６３，６３ｚ送信電力制御部
７０較正信号発生保持部
８４参照信号導入部
８５送信参照信号導出部
３４１周波数変換器
３４２方向性結合器
３４３加算器
３４４可変減衰器
３５１周波数変換器
３５２方向性結合器
３５３可変減衰器
８４１周波数変換器
８４２方向性結合器
８４３加算器
８４４減衰器
８４５可変減衰器
８５１周波数変換器
８５２方向性結合器
８５３減衰器
８５５可変減衰器[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multiple access communication apparatus, and more particularly to a multiple access communication apparatus using a CDMA system or the like that employs an array antenna to set a transmission / reception direction for each of a plurality of individual communication paths that can be connected in multiple access.
[0002]
[Prior art]
The most basic multi-access communication device of the past, which employs an array antenna with a plurality of antenna elements arranged to enable transmission / reception for each of a plurality of individual communication paths capable of multi-connection, There is a configuration in which a transmitter and a receiver are connected to each of a plurality of antenna elements of an antenna via a duplexer.
[0003]
In a multiple access communication device having such a configuration, individual and time-dependent differences in amplitude characteristics and phase characteristics between these transmitters and receivers occur, adversely affecting directivity and the like, and reducing transmission power. In addition, there is a problem that the effect of reducing inter-communication interference cannot be obtained sufficiently.
[0004]
Accordingly, the inventors of the present application are provided with an amplitude / phase control transmission / reception unit capable of controlling the amplitude and phase of the transmission / reception signal corresponding to each of the plurality of antenna elements as shown in FIGS. 4 and 5. Proposed a multiple access communication device (Japanese Patent Application No. 2000-58983).
[0005]
In this conventional example (hereinafter referred to as a conventional first example), a transmission system and a reception controlled by the amplitude / phase control transmission / reception unit 30x correspondingly connected to each of the plurality of antenna elements 11 based on the reference signal. Since the system amplitude / phase controller (31, 37) is provided, it is possible to control the amplitude and phase of signals for the transmission system and the reception system. However, the reference signal introducing unit 84, the transmission reference signal deriving unit 85, and the calibration signal generation holding unit 70 include switches S1 to S6 for switching between the transmission system and the reception system, and the switching operation thereof. There are problems such as noise due to noise, circuit malfunction, etc., and the time for amplitude and phase control operations becomes long.
[0006]
To solve this problem, eliminate the cause of noise and circuit malfunction by eliminating the switch, and at the same time, simplify the circuit and perform amplitude phase control operation simultaneously with transmission and reception, shortening the overall operation time The present inventors have proposed a multi-access communication device that can do this (Japanese Patent Application No. 2000-271037, second conventional example). A block diagram of the amplitude / phase control transmitting / receiving unit 30y (30x modified) is shown in FIG.
[0007]
In the second conventional example, the switching device is eliminated from the reference signal introducing unit 84y and the transmission reference signal deriving unit 85y, and a switching device is included instead of the calibration signal generating / holding unit 70 of the first conventional example. Two error detectors 61 and 62 for transmission and reception are provided, and a delay unit 60 is provided so that the transmission system and the reception system can proceed simultaneously.
[0008]
In the second example, the reference signal introducing unit 84y includes a frequency converter 841, a directional coupler 842, an adder 843, and an attenuator 844, and the transmission reference signal deriving unit 85y is a frequency converter. 851, a directional coupler 852, and an attenuator 853.
[0009]
Also, in a multiple access communication device equipped with an array antenna, a variable gain amplifier on the receiving side that adjusts the reception gain corresponding to the received signal power in the reception system and transmission system of the amplitude / phase control transmission / reception unit (general) In some cases, it is included in the receiver), and a variable gain amplifier on the transmission side (also included in the transmitter) for setting transmission power according to the situation as a radio device may be included. In such a case, it is necessary to introduce a reference signal of power corresponding to the gain of these variable gain amplifiers. As a multiple access communication device having such a function, a configuration described in the literature by the inventors of the present application, IEICE Technical Report RC2000-31 “Automatic calibration method using LMS algorithm of array antenna radio section in DS-CDMA” There are things. A block diagram of the reception system and a block diagram of the transmission / reception system are shown in FIGS. 7A and 7B (hereinafter referred to as a conventional third example).
[0010]
In this third example, the reference signal dr of the reception system is connected to the antenna element 11 through the variable attenuator 845 whose attenuation is determined according to the level of the output signal RX detected by the amplitude level detector 39z. Input from the transmission line of the radio frequency signal to the receiving system. The transmission information signal TX itself is used as a transmission system reference signal. The transmission system reference signal TX includes a transmission side amplitude / phase controller 31, a transmitter 32, a transmission / reception duplexer 33, and an antenna element 11. The directional coupler is passed through a variable attenuator 855 that is extracted from the transmission line by a directional coupler 852 via a transmission line of a radio frequency band signal that leads to, and whose attenuation is controlled by a transmission power control unit 63z. The signal is again input from the transmission line of the radio frequency band signal to the calibrated receiving system via 842.
[0011]
According to the configuration of the third example, even when a variable gain amplifier is included in the transmission system and the reception system, the calibration of the reception system (also referred to as calibration) and the calibration of the transmission system are performed sequentially by switching these circuits. And the reference signal level can be set to an appropriate level.
[0012]
[Problems to be solved by the invention]
In the first example, the conventional multiple-access communication apparatus described above includes a transmission-side amplitude / phase controller 31 and a reception-side amplitude / phase controller 37 that are controlled based on a reference signal, It is possible to control the amplitude and phase of the signal for the transmission system and the reception system, reduce transmission power and reduce inter-communication interference, but generate a calibration signal w for controlling the amplitude and phase. The necessary reference signal introduction unit 84x, transmission reference signal introduction unit 85x, and calibration signal generation holding unit 70 are provided with switches S1 to S6 for switching between the calibration operation of the reception system and the calibration operation of the transmission system. Therefore, there are problems such as noise caused by the switching operation, circuit malfunction, etc., and the time of amplitude and phase control operations become long. In the second example made to solve this problem, the calibration signal is Generation holder 70 Instead, an error detector 61 and an error detector 62 without a switching device are provided separately for the reception system and the transmission system, and a delay device 60 is provided so that the calibration of the reception system and the transmission system can proceed simultaneously. The reception system and the transmission system can be calibrated in parallel, and the reference signal introducing unit 84y and the transmission reference signal deriving unit 85y are eliminated.
[0013]
However, in such a multiple access communication apparatus, a variable gain amplifier that adjusts a reception gain corresponding to reception signal power in a reception system, and a transmission power for setting transmission power according to a situation as a radio in a transmission system In some cases, variable gain amplifiers may be included. In this case, it is necessary to introduce a reference signal having a power corresponding to the gain of these variable gain amplifiers. 855) has been announced, but in this third example, after calibrating the receiving system, the system is switched to the transmitting system and the transmitting system is calibrated. The problem that the calibration of the reception system and the calibration of the transmission system cannot be performed simultaneously in parallel, and the amount of attenuation when switching the variable attenuators 845 and 855 alternately in the reception system and the transmission system Unnecessary signal according to the difference But there is a risk that occurs, there is a problem in that.
[0014]
In view of the above-mentioned problems of the prior art, it is an object of the present invention to perform calibration of a reception system and calibration of a transmission system with an appropriate level of reference signal even when a variable gain amplifier is included in the reception system and the transmission system. Thus, it is possible to provide a multi-access communication device that can perform these operations in parallel without switching operation, eliminate the occurrence of circuit malfunction, noise and unnecessary signals, and shorten the calibration time.
[0015]
[Means for Solving the Problems]
The multi-access communication device of the present invention uses an array antenna in which a plurality of antenna elements are arranged, and transmits and transmits the transmission radio wave to each of a plurality of individual communication paths that can be multi-connected. A multiple access communication apparatus that performs communication by setting a reception direction for radio waves, and has the following configurations.
(A) Antenna elements provided corresponding to each of the plurality of antenna elements of the array antenna, and corresponding to the transmission information signal of each of the plurality of individual communication paths converted into the transmission signal of the radio frequency band (B) a transmitter whose output level is controllable (b) provided corresponding to each of the plurality of antenna elements of the array antenna, and receiving a radio frequency band reception signal from the corresponding antenna element A variable gain amplification type receiver (c) that converts the received information signal of each of the communication paths into a received information signal and controls the gain so that the output level thereof is constant, and (c) the frequency band of the transmitted information signal and the received information signal A reception system reference signal having the same frequency band is converted into a signal of the same frequency band as the reception signal of the radio frequency band based on the local oscillation signal for reception system control, and the signal is transmitted. A reception reference signal level setting / reference signal introduction unit (d) that sets a level by attenuating with a gain of a corresponding receiver and an attenuation amount corresponding to the level and introduces the level into a corresponding radio frequency band reception signal transmission path. The amplitude characteristic and the phase characteristic with respect to the reference signal of the reception system in the reception system signal path from the reference signal introduction part of the reception system to the output terminal of the reception information signal via the corresponding receiver Control based on the information of the difference between the signal in the vicinity of the reception information signal output end of the system signal path and the signal of the introduction portion of the reference signal of the reception system, and in the signal at the reception information signal output end A receiving system amplitude phase control / reference signal removing means for removing a reference signal portion of the receiving system (e) a reference signal of a transmitting system having a sufficiently small correlation coefficient with the reference signal of the receiving system; At the transmission information signal input terminal In addition, the transmitter converts the signal to the same frequency band as the radio frequency transmission signal and supplies the signal to the corresponding antenna element. From the transmission signal transmission path to the corresponding antenna element, the radio frequency band A reference signal for the transmission system is derived and converted to the same frequency band as the reception signal of the radio frequency band based on the local oscillation signal for transmission system control, and the signal level is a value corresponding to the output signal level of the transmitter A transmission reference signal derivation / level setting unit that attenuates and sets the transmission reference signal, introduces and supplies the reference signal of the transmission system to the reception signal transmission path of the corresponding antenna element, and The amplitude characteristic and the phase characteristic with respect to the reference signal of the transmission system in the transmission system signal path from the input terminal to the reference signal derivation part of the transmission signal transmission path to the antenna element are represented by the input terminal of the transmission information signal. And a reference signal component of the transmission system in the signal of the reception information signal output end is controlled based on information on the difference between the signal of the reference signal deriving portion and the signal at the output end of the reference signal deriving portion. Phase control / reference signal removal means [0016]
Further, in the transmission system amplitude phase control / reference signal removal means, the introduction of the transmission system reference signal from the transmission reference signal derivation / level setting unit into the reception signal transmission path of the corresponding antenna element is the reception reference signal. The level setting / reference signal introducing unit has a configuration that is performed via a reception reference signal level setting unit.
[0017]
Further, the reception reference signal level setting / reference signal introducing unit sets the attenuation amount according to the level of the output terminal of the reception information signal of the reception system signal path, and the reception signal of the reference signal of the reception system A transmission side variable attenuator is provided for setting the introduction level to the transmission line, and the transmission reference signal derivation / level setting introduction unit sets the attenuation amount according to the output signal level of the transmitter. And a transmission side variable attenuator for setting an introduction level of the reference signal of the transmission system to the reception signal transmission line.
[0018]
Further, the level of the reference signal of the reception system and the level of the reference signal of the transmission system are set to the same level at the variable attenuator input end on the reception side in the reception reference signal level setting / reference signal introducing unit. It has a configuration.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the present invention uses an array antenna in which a plurality of antenna elements are arranged, and transmits and transmits a transmission radio wave to each of a plurality of individual communication paths that can be connected in multiple ways. A multi-access communication device that performs communication by setting a receiving direction for a radio wave, corresponding to each of a plurality of antenna elements, a transmitter, a receiver, a received reference signal level setting / reference signal introducing unit, a receiving system amplitude phase It comprises a transmission system amplitude phase control / reference signal removal means including a control / reference signal removal means and a transmission reference signal derivation / level setting introduction section, and the details of these parts are as follows.
[0020]
A transmitter is provided corresponding to each of the plurality of antenna elements of the array antenna, and converts a transmission information signal of each of the plurality of individual communication paths into a transmission signal of the radio frequency band and corresponding antenna The output level supplied to the element is controllable.
[0021]
A receiver is provided corresponding to each of the plurality of antenna elements of the array antenna, and converts a reception signal of a radio frequency band from the corresponding antenna element into a reception information signal of each of the plurality of individual communication paths. In addition, the gain is controlled so that the output level becomes constant.
[0022]
The reception reference signal level setting / reference signal introduction unit receives the reference signal of the reception system having the same frequency band as that of the transmission information signal and the reception information signal based on the local oscillation signal for reception system control. The signal is converted to a signal in the same frequency band as the received signal in the band, and the signal level is set by attenuating with the corresponding receiver gain and the corresponding attenuation value, and the corresponding radio frequency band received signal transmission path To introduce.
[0023]
The reception system amplitude phase control / reference signal removal means is configured to receive the reception system in the reception system signal path from the reference signal introduction portion of the reception system to the output terminal of the reception information signal via the corresponding receiver. The amplitude characteristics and phase characteristics of the reference signal of the reception system are controlled based on information on the difference between the signal in the vicinity of the reception information signal output end of the reception system signal path and the signal of the introduction part of the reference signal of the reception system. In addition, the reference signal portion of the reception system in the signal at the reception information signal output terminal is removed.
[0024]
The transmission system amplitude / phase control / reference signal removing means applies a transmission system reference signal having a sufficiently small correlation coefficient with the reception system reference signal to the transmission information signal input terminal of the transmitter, The signal is converted into a signal of the same frequency band as the transmission signal of the radio frequency band and supplied to the corresponding antenna element. From the transmission signal transmission path to the corresponding antenna element, the reference signal of the transmission system of the radio frequency band Is converted to the same frequency band as the reception signal of the radio frequency band based on the local oscillation signal for transmission system control, and the signal level is attenuated by the attenuation amount of the value corresponding to the output signal level of the transmitter. Including a transmission reference signal derivation / level setting unit, and introducing and supplying the reference signal of the transmission system to the reception signal transmission path of the corresponding antenna element, from the input end of the transmission information signal, To the antenna element Amplitude characteristics and phase characteristics of the transmission system reference signal in the transmission system signal path up to the reference signal derivation section of the transmission signal transmission path are represented by the signal at the input terminal of the transmission information signal and the output terminal of the reference signal derivation section. And the reference signal component of the transmission system in the signal at the reception information signal output end is removed.
[0025]
By adopting such a configuration, even if the transmitter and receiver are output level control type and variable gain control type, calibration of the transmission system and calibration of the reception system are performed in parallel without switching operation. The amount of attenuation of the variable attenuator can be controlled according to the transmission signal level and according to the gain that changes from time to time, and the level of the reference signal can be set as an appropriate level. Generation, noise and unnecessary signals are eliminated, and the calibration time can be shortened.
[0026]
Further, in the transmission system amplitude phase control / reference signal removal means, the introduction of the transmission system reference signal from the transmission reference signal derivation / level setting unit into the reception signal transmission path of the corresponding antenna element is the reception reference signal. The level setting / reference signal introducing unit is configured to be configured via the reception reference signal level setting part, and the reception reference signal level setting / reference signal introducing unit outputs the reception information signal of the reception system signal path. The transmission reference signal is configured to include a variable attenuator on the reception side in which the attenuation amount is set according to the level of the end, and sets the introduction level of the reference signal of the reception system to the reception signal transmission path. The derivation / level setting introduction unit sets the level of attenuation according to the output signal level of the transmitter, and sets the introduction level of the reference signal of the transmission system to the reception signal transmission path. By adopting a configuration including an attenuator, these variable attenuators change the attenuation amount according to the signal level and the amplification gain that change from time to time in each of the transmission system and the reception system. The step size of the signal can be reduced, and the generation of unwanted signals due to gain changes and hence attenuation changes can be suppressed, and the calibration operation of the transmission system can be performed via the calibrated reception system circuit. Can be performed more smoothly.
[0027]
Further, the level of the reference signal of the reception system and the level of the reference signal of the transmission system are set to the same level at the variable attenuator input end on the reception side in the reception reference signal level setting / reference signal introducing unit. With this configuration, when the reference signal of the transmission system passes through the reception system circuit, the signal level is optimal for this reception system circuit. Therefore, even if the calibration of the transmission system and the reception system is performed in parallel, The calibration operation can be performed without interfering with the other calibration operation.
[0028]
【Example】
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram of an entire multiple access communication apparatus showing an embodiment of the present invention, and FIG. 2 is a circuit block diagram in each amplitude / phase control transmission / reception unit.
The difference between the amplitude / phase control transmission / reception unit 30 of this embodiment and the amplitude / phase control transmission / reception unit 30y of the second conventional example shown in FIG. 6 is that in the second conventional example, the transmitter 32x 2 and FIG. 2, it is not clear whether or not the receiver 36x is a variable gain type. In FIG. 2, the output level of the transmitter 32 is controlled by the transmission power control unit 63, and the receiver 36 A variable gain type whose gain is controlled by the detector 39, and a transmission-side variable attenuator whose attenuation is controlled by the transmission power control unit 63 instead of the conventional transmission reference signal deriving unit 85y. And a transmission reference signal derivation / level setting unit 35 for setting the level of the transmission reference signal by the variable attenuator 353. The attenuation level control unit 39 replaces the attenuation amount by the amplitude level control unit 39 instead of the conventional reference signal introduction unit 84y. Is controlled A variable attenuator 344 on the transmission side is included, and the level of the reference signal of the reception system is set by the variable attenuator 344 and introduced into the reception system. At the same time, the transmission reference signal also passes through the variable attenuator 344 to the reception system. A reception reference signal level setting / reference signal introduction unit 34 to be introduced is provided.
[0029]
In this embodiment, the level of the reference signal on the receiving side is reduced by the amplitude level detector 39 and the variable attenuator 344 on the receiving side to a value corresponding to the amplification gain of the receiver 36 (that is, the variable attenuator). The signal is attenuated by a gain of 344 (the inverse of the attenuation) and the amplification gain of the receiver 36 so as to be constant) and introduced into the receiving system circuit. Further, the level of the reference signal on the transmission side is attenuated by the transmission power control unit 63 and the variable attenuator 353 on the transmission side according to the amplification gain of the transmitter 32 and the value corresponding to the output signal level (of the variable attenuator 353). The product of the gain and the amplification gain of the transmitter 32 becomes constant) and is introduced into the calibrated reception system circuit.
[0030]
Therefore, the reference signal of the reception system that passes through the reception system circuit is at an appropriate level in each part of the reception system circuit even if the gain of the reception system changes, and the calibration of the reception system circuit is normally performed. It can be carried out.
The reference signal of the transmission system that passes through the transmission system circuit is input to the input terminal of the transmission system circuit at a level corresponding to the transmission signal, and this reference signal is input to the calibrated reception system circuit at an appropriate level. Therefore, calibration related to the transmission system can be performed normally as well.
[0031]
Further, the calibration of the reception system and the transmission system (including the reception system) is performed simultaneously in parallel without switching operation and without interfering with each other, so that no circuit malfunction occurs, noise, An unnecessary signal is not generated, and it can be performed normally and the calibration time can be shortened. In addition, variable attenuators are provided corresponding to the reception system and the transmission system, respectively, and these variable attenuators change their attenuation amounts corresponding to the fluctuation speeds of the gains of the reception system and the transmission system. It is possible to reduce the step size of the change amount of the vessel, and it is possible to prevent generation of unnecessary signals due to a sudden change in the attenuation amount.
[0032]
In this embodiment, the level of the reference signal for the transmission system and the level of the reference signal for the reception system are set to substantially the same level at the input end of the variable attenuator 344 of the reception system, and the reference signal and reception of these transmission systems are set. Interference with respect to the other calibration operation does not occur between the reference signals of the system, and each calibration is normally performed. However, the level may be changed within a range where there is no mutual interference.
[0033]
In this embodiment, the transmission reference signal derivation / level setting unit 35 immediately attenuates the signal from the directional coupler 352 with the variable attenuator 353 and then converts the frequency with the frequency converter 351. However, as shown in FIG. 3, the signal from the directional coupler 352 may be first frequency-converted by the frequency converter 351 and then attenuated by the variable attenuator 353.
[0034]
Also, the input level of the reception system and transmission system reference signals to the reception system circuit input terminal (transmission line between the antenna element 11 and the transmission / reception duplexer 33) is the final stage reference signal due to the nonlinearity of each part. Since it may be assumed that the remover 38 cannot completely remove the signal, it is desirable that the level of the received signal in the radio frequency band is about 1/100.
[0035]
【The invention's effect】
As described above, according to the present invention, when the reception system circuit and the transmission system circuit include variable gain amplifiers, the level of the reference signal of the reception system is determined and this reference signal is introduced into the reception system circuit. The level setting / reference signal introduction unit includes a variable attenuator on the receiving side that attenuates the level of the reference signal by the amount of attenuation corresponding to the amplification gain of the reception system circuit. Reference to the transmission system via the transmission system The reference level of the reference signal, the level of the output signal of the transmitter, and the attenuation corresponding to the amplification gain are determined in the transmission reference signal derivation / level setting unit that derives the signal and determines the introduction level to the receiving system circuit. By including a variable attenuator on the transmission side that attenuates by the amount, and a configuration in which these are performed in parallel, these references are made according to the amplification gain of the reception system circuit and according to the transmission output level. Receive signal The introduction level to the circuit can be set to an appropriate level, the occurrence of circuit malfunction, generation of noise and unnecessary signals can be eliminated, normal calibration operation can be performed, and the calibration time can be shortened. The signal of the reference signal of the transmission system in the reception system circuit is calibrated by introducing the level-set reference signal of the transmission system into the reception system circuit via the reception system reference signal level setting unit. The level can be set to an appropriate level, and the calibration operation can be performed more smoothly, and the reference signal levels of the transmission system and the reception system are the same at the introduction end to the reception system circuit. By setting the level to a certain level, there is an effect that both calibrations can be performed normally and smoothly without interfering with each other.
[Brief description of the drawings]
FIG. 1 is a block diagram of an entire apparatus showing an embodiment of the present invention.
2 is a circuit block diagram of an amplitude / phase control transmission / reception unit of the embodiment shown in FIG. 1; FIG.
FIG. 3 is a diagram illustrating another circuit block configuration of a transmission reference signal derivation / level setting unit in the amplitude / phase control transmission / reception unit shown in FIG. 2;
FIG. 4 is a block diagram of an entire apparatus of a first example of a conventional multiple access communication apparatus.
5 is a circuit block diagram of an amplitude / phase control transmission / reception unit in the multiple access communication apparatus shown in FIG. 4;
FIG. 6 is a circuit block diagram of an amplitude / phase control transmission / reception unit in a second example of a conventional multiple access communication device;
FIG. 7 is a circuit block diagram for explaining a reception system calibration operation and a transmission system calibration operation including a calibrated reception system circuit in a third example of a conventional multiple-access communication device;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Array antenna 11 Antenna element 30,30x, 30y Amplitude / phase control transmission / reception part 31 Transmission side amplitude / phase controller 32,32x Transmitter 33 Transmission / reception duplexer 34 Reception reference signal level setting / reference signal introduction part 35, 35a Transmission Reference signal derivation / level setting unit 36, 36x receiver 37 Reception side amplitude / phase controller 38, 38r, 38t, 38x Reference signal remover 39, 39z Amplitude level detector 60 Delay devices 61, 61z, 62, 62z Error detection 63, 63z Transmission power control unit 70 Calibration signal generation holding unit 84 Reference signal introducing unit 85 Transmission reference signal deriving unit 341 Frequency converter 342 Directional coupler 343 Adder 344 Variable attenuator 351 Frequency converter 352 Directional coupler 353 Variable attenuator 841 Frequency converter 842 Directional coupler 843 Adder 844 Attenuator 45 variable attenuator 851 frequency converter 852 directional coupler 853 attenuator 855 variable attenuator

Claims

Using an array antenna with a plurality of antenna elements arranged, communication is performed by setting the transmission direction of the transmitted radio wave and the reception direction of the transmitted radio wave for each of multiple individual communication paths that can be connected in multiple ways A multi-access communication apparatus that performs the following operations, and has the following configurations.
(A) Antenna elements provided corresponding to each of the plurality of antenna elements of the array antenna, and corresponding to the transmission information signal of each of the plurality of individual communication paths converted into the transmission signal of the radio frequency band (B) a transmitter whose output level is controllable (b) provided corresponding to each of the plurality of antenna elements of the array antenna, and receiving a radio frequency band reception signal from the corresponding antenna element A variable gain amplification type receiver (c) that converts the received information signal of each of the communication paths into a received information signal and controls the gain so that the output level thereof is constant, and (c) the frequency band of the transmitted information signal and the received information signal A reception system reference signal having the same frequency band is converted into a signal of the same frequency band as the reception signal of the radio frequency band based on the local oscillation signal for reception system control, and the signal is transmitted. A reception reference signal level setting / reference signal introduction unit (d) that sets a level by attenuating with a gain of a corresponding receiver and an attenuation amount corresponding to the level and introduces the level into a corresponding radio frequency band reception signal transmission path. The amplitude characteristic and the phase characteristic with respect to the reference signal of the reception system in the reception system signal path from the reference signal introduction part of the reception system to the output terminal of the reception information signal via the corresponding receiver Control based on the information of the difference between the signal in the vicinity of the reception information signal output end of the system signal path and the signal of the introduction portion of the reference signal of the reception system, and in the signal at the reception information signal output end A receiving system amplitude phase control / reference signal removing means for removing a reference signal portion of the receiving system (e) a reference signal of a transmitting system having a sufficiently small correlation coefficient with the reference signal of the receiving system; At the transmission information signal input terminal In addition, the transmitter converts the signal to the same frequency band as the radio frequency transmission signal and supplies the signal to the corresponding antenna element. From the transmission signal transmission path to the corresponding antenna element, the radio frequency band A reference signal for the transmission system is derived and converted to the same frequency band as the reception signal of the radio frequency band based on the local oscillation signal for transmission system control, and the signal level is a value corresponding to the output signal level of the transmitter A transmission reference signal derivation / level setting unit that attenuates and sets the transmission reference signal, introduces and supplies the reference signal of the transmission system to the reception signal transmission path of the corresponding antenna element, and The amplitude characteristic and the phase characteristic with respect to the reference signal of the transmission system in the transmission system signal path from the input terminal to the reference signal derivation part of the transmission signal transmission path to the antenna element are represented by the input terminal of the transmission information signal. And a reference signal component of the transmission system in the signal of the reception information signal output end is controlled based on information on the difference between the signal of the reference signal deriving portion and the signal at the output end of the reference signal deriving portion. Phase control / reference signal removal means

In the transmission system amplitude / phase control / reference signal removal means, the introduction of the transmission system reference signal from the transmission reference signal derivation / level setting unit into the reception signal transmission path of the corresponding antenna element is the reception reference signal level setting. The multi-access communication apparatus according to claim 1, wherein the reference signal introduction unit is configured to be performed via a reception reference signal level setting part.

The reception reference signal level setting / reference signal introducing unit sets the attenuation amount according to the level of the output terminal of the reception information signal of the reception system signal path, and the reception signal transmission path of the reference signal of the reception system Is configured to include a variable attenuator on the receiving side for setting the introduction level to the transmission reference signal derivation / level setting introduction unit, the attenuation amount is set according to the output signal level of the transmitter, The multi-access communication apparatus according to claim 1, further comprising a transmission-side variable attenuator that sets an introduction level of the reference signal of the transmission system to a reception signal transmission line.

The level of the reference signal of the reception system and the level of the reference signal of the transmission system are set to the same level at the input end of the variable attenuator on the reception side in the reception reference signal level setting / reference signal introducing unit. 4. A multiple access communication apparatus according to claim 2 and claim 3.