JP2003298483A - Directivity beam switching receiver - Google Patents
Directivity beam switching receiverInfo
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- JP2003298483A JP2003298483A JP2002096750A JP2002096750A JP2003298483A JP 2003298483 A JP2003298483 A JP 2003298483A JP 2002096750 A JP2002096750 A JP 2002096750A JP 2002096750 A JP2002096750 A JP 2002096750A JP 2003298483 A JP2003298483 A JP 2003298483A
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＷＣＤＭＡ（Wide
band Code Division Multiple Access ）方式移動通信
システム等で用いられる指向性ビーム切替受信機に関す
る。ＷＣＤＭＡ方式は、現在３ＧＰＰ（３ｒｄ Generat
ion Partnership Project ）において標準化が進められ
ている第三世代移動通信方式の一方式であり、複数のユ
ーザ間において、それぞれ異なる符号により拡散された
信号データを同一周波数帯域に多重して通信するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to WCDMA (Wide).
The present invention relates to a directional beam switching receiver used in a band code division multiple access (MS) system mobile communication system or the like. The WCDMA system is currently 3GPP (3rd Generat)
Ion Partnership Project), which is one of the third-generation mobile communication systems that is being standardized, and that multiple users communicate with each other by multiplexing the signal data spread by different codes in the same frequency band. is there.
【０００２】しかし、各ユーザ間で使用される符号は完
全に直交していないため、逆拡散後の信号データには他
ユーザの送信信号からの干渉成分が含まれてしまう。図
９に逆拡散後の信号に対する他ユーザの送信信号からの
干渉成分の影響を示す。同図の（ａ）は、各ユーザから
の受信信号＃１〜＃４、及びその中の通信対象ユーザの
受信信号＃１の逆拡散後信号と他のユーザの受信信号＃
２〜＃４からの干渉成分とを示す。However, since the codes used between the users are not completely orthogonal, the signal data after despreading contains interference components from the transmission signals of other users. FIG. 9 shows the influence of interference components from the transmission signals of other users on the despread signal. (A) of the figure shows received signals # 1 to # 4 from each user, and a despread signal of the received signal # 1 of the communication target user among them, and received signals # of other users.
2 to the interference components from # 4.
【０００３】図９（ａ）において、受信信号＃１の逆拡
散後信号のレベルは、他ユーザの受信信号＃２〜＃４の
干渉成分を重ね合わせたレベルより十分上回り、他ユー
ザ受信信号＃２〜＃４の干渉成分の合計レベルは、通信
対象ユーザ受信信号＃１の逆拡散後信号に対して、十分
な通信品質を満たすことができる干渉量の上限以下であ
るので、受信信号＃１は良好に受信することができる。In FIG. 9 (a), the level of the despread signal of the received signal # 1 is sufficiently higher than the level in which the interference components of the received signals # 2 to # 4 of other users are superposed, and the received signal of the other user # is received. Since the total level of the interference components of 2 to # 4 is equal to or less than the upper limit of the interference amount that can satisfy the sufficient communication quality for the despread signal of the communication target user received signal # 1, the received signal # 1 Can be received well.
【０００４】一方、図９（ｂ）は他ユーザからの干渉量
が増大した状態を示し、多数のユーザ受信信号＃１〜＃
Ｎ（Ｎ＞＞４）、及びその中の通信対象ユーザ受信信号
＃１の逆拡散後信号と他のユーザ受信信号＃２〜＃Ｎに
よる干渉成分とを示す。同図において、受信信号＃１の
逆拡散後信号のレベルは、他のユーザ受信信号＃２〜＃
Ｎの干渉成分を重ね合わせたレベルを上回るものの、他
ユーザ受信信号＃２〜＃４の干渉成分の合計レベルは、
通信対象ユーザ受信信号＃１に対して、十分な通信品質
を満たすことができる干渉量の上限に達しているので、
移動通信システムはこれ以上の通信を許容することがで
きない。On the other hand, FIG. 9B shows a state in which the amount of interference from other users has increased, and a large number of user received signals # 1 to # are received.
N (N >> 4), and the despread signal of the communication target user received signal # 1 therein and interference components due to other user received signals # 2 to #N are shown. In the figure, the levels of the signals after despreading the received signal # 1 are the levels of other user received signals # 2 to #.
Although it exceeds the level in which the N interference components are superposed, the total level of the interference components of the other user received signals # 2 to # 4 is
Since the communication target user received signal # 1 has reached the upper limit of the amount of interference that can satisfy sufficient communication quality,
The mobile communication system cannot allow further communication.
【０００５】図９に示すように、十分な通信品質を満た
す逆拡散後信号が得られるユーザ数の上限、つまりシス
テム容量は、他ユーザ送信機からの干渉量によって決定
される。干渉量を低減する手段の１つとして、指向性を
有するアンテナを用い、通信対象ユーザに指向性ビーム
を向けて該ユーザ端末の送信信号を集中的に受信する指
向性ビーム切替受信機が考えられている。本発明は、Ｗ
ＣＤＭＡ方式の移動通信システム等における符号多重信
号を受信する指向性ビーム切替受信機に関する。As shown in FIG. 9, the upper limit of the number of users who can obtain a signal after despreading that satisfies sufficient communication quality, that is, the system capacity is determined by the amount of interference from other user transmitters. As one of means for reducing the amount of interference, a directional beam switching receiver is conceivable, which uses a directional antenna and directs a directional beam to a communication target user to intensively receive a transmission signal of the user terminal. ing. The present invention is based on W
The present invention relates to a directional beam switching receiver for receiving code-multiplexed signals in a CDMA mobile communication system or the like.
【０００６】[0006]
【従来の技術】他ユーザからの干渉量を低減してシステ
ム容量を増大化する技術として、干渉キャンセラ、アダ
プティブアレイアンテナ及びスイッチドビームアンテナ
等を用いて、他ユーザからの干渉を抑圧する技術が検討
されている。干渉キャンセラにより干渉量を抑圧する手
段は、原理的には他ユーザからの干渉全てを削減する必
要があるため、他ユーザ分の干渉成分推定回路が必要と
なり、回路規模が非常に大きなものとなってしまう。2. Description of the Related Art As a technique for reducing the amount of interference from other users and increasing the system capacity, there is a technique for suppressing interference from other users by using an interference canceller, an adaptive array antenna, a switched beam antenna, or the like. Is being considered. In principle, the means for suppressing the amount of interference by the interference canceller needs to reduce all the interference from other users, so an interference component estimation circuit for other users is required, and the circuit scale becomes very large. Will end up.
【０００７】そこで、大きな干渉量となる高速データユ
ーザ信号による干渉のみをキャンセルすることにより、
回路規模の削減を図ることなどが考えられているが、そ
の場合でも、想定される高速データ送信ユーザ分の干渉
成分推定回路が必要となる。また、アダプティブアレイ
アンテナやスイッチドビームアンテナを用いた場合と比
較して、回路規模の増加に対するシステム容量の増加は
あまり大きなものとはならない。Therefore, by canceling only the interference due to the high-speed data user signal that causes a large amount of interference,
Although it is considered to reduce the circuit scale, even in that case, an interference component estimation circuit for an expected high-speed data transmission user is required. Further, the increase in system capacity with respect to the increase in circuit scale is not so large as compared with the case where the adaptive array antenna or the switched beam antenna is used.
【０００８】アダプティブアレイアンテナにより干渉量
の抑圧を図るためには、適応的にアレイアンテナの指向
性を通信対象ユーザ端末に向けるために、最小二乗平均
法（ＬＭＳ）等の収束アルゴリズムを実現する回路が必
要となる。一般的にこれら収束アルゴリズムを実現する
回路は大きな規模のものとなってしまう。In order to suppress the amount of interference by the adaptive array antenna, a circuit for realizing a convergence algorithm such as the least mean square method (LMS) in order to adaptively direct the directivity of the array antenna to the user terminal to be communicated. Is required. In general, the circuit that implements these convergence algorithms will be of large scale.
【０００９】また、アダプティブアレイアンテナに使用
するアンテナ素子の本数を増やすことにより、ビーム幅
を狭くして干渉量の低減を図ることができるが、設置コ
スト及び回路規模の制約により、設置し得るアンテナ素
子本数は実際には４〜８本程度が限度である。Also, by increasing the number of antenna elements used in the adaptive array antenna, the beam width can be narrowed to reduce the amount of interference, but the antennas that can be installed due to restrictions on installation cost and circuit scale. Actually, the number of elements is limited to about 4 to 8.
【００１０】アンテナ素子本数が少ないとアレイアンテ
ナの指向性ビーム幅が広がってしまう。しかしこの場
合、通信対象ユーザに対して正確に指向性ビームが向い
てなく、多少の方向ずれがあっても、干渉抑圧量は大き
く劣化しないこととなる。このことから、アンテナ素子
を多数設置することができないなどといった制約がある
場合に、図１０に示すように、予め固定的にそれぞれ異
なる方向に向かう複数の指向性ビーム＃１〜＃８を形成
しておき、該複数のビーム＃１〜＃８の中から、通信品
質が最良となるビームに受信ビームを切替え、該ビーム
の受信信号を復調して出力するスイッチドビームアンテ
ナ受信機は、収束アルゴリズムを必要としないため回路
規模を削減することができ、有効であると考えられてい
る。When the number of antenna elements is small, the directional beam width of the array antenna is widened. However, in this case, the directional beam is not accurately directed to the communication target user, and even if there is some deviation in direction, the interference suppression amount does not significantly deteriorate. From this, when there is a constraint such that a large number of antenna elements cannot be installed, as shown in FIG. 10, a plurality of directional beams # 1 to # 8 fixedly directed in different directions are formed beforehand. The switched beam antenna receiver that switches the reception beam from the plurality of beams # 1 to # 8 to the beam having the best communication quality, demodulates the received signal of the beam, and outputs the demodulated signal is a convergence algorithm. Since it is not necessary, the circuit scale can be reduced, and it is considered to be effective.
【００１１】スイッチドビームアンテナを用いた従来の
指向性ビーム切替受信機を図１１に示す。スイッチドビ
ームアンテナによる信号受信は、図１０に示したような
予め決められた複数の異なる方向のビーム＃１〜＃８を
形成する。図１１の構成において、これらのビーム＃１
〜＃８は、各アンテナ毎の逆拡散部１１−１１〜１１−
１４により逆拡散した信号に対して、各アンテナ毎にビ
ーム数分の異なるウェイト値Ｗ＿１＿１〜Ｗ＿１＿４，
Ｗ＿２＿１〜Ｗ＿２＿４，・・・，Ｗ＿８＿１〜Ｗ＿８
＿４を乗じて位相回転を行うことによって形成され、各
ビーム＃１〜＃８の受信信号は、各ビーム毎に合成部１
１−２１，１１−２２，…，１１−２８で合成され、各
ビーム毎の同期検波部１１−３１，１１−３２，…，１
１−３８で同期検波され、任意の方向から到来する信号
が受信される。A conventional directional beam switching receiver using a switched beam antenna is shown in FIG. Signal reception by the switched beam antenna forms a plurality of predetermined beams # 1 to # 8 in different directions as shown in FIG. In the configuration of FIG. 11, these beam # 1
~ # 8 are despreaders 11-11 to 11- for each antenna.
For the signals despread by 14, different weight values W_1_1 to W_1_4 corresponding to the number of beams for each antenna.
W_2_1 to W_2_4, ..., W_8_1 to W_8
The signals received by the beams # 1 to # 8 are formed by multiplying _4 and performing phase rotation.
1-21, 11-22, ..., 11-28, and the synchronous detection units 11-31, 11-32 ,.
The signal is synchronously detected at 1-38 and a signal coming from an arbitrary direction is received.
【００１２】そして、各ビーム毎の同期検波部１１−３
１，１１−３２，…，１１−３８で同期検波した信号の
品質を、各ビーム毎の受信品質測定部１１−４１，１１
−４２，…，１１−４８で測定し、その各ビーム毎の測
定値を受信品質比較部１１−５で比較し、受信品質比較
部１１−５は最良の受信品質のビームを示す情報を受信
信号選択部１１−６に通知する。Then, the synchronous detection unit 11-3 for each beam
, 11-32, ..., 11-38, the quality of the signal synchronously detected is measured by the reception quality measuring units 11-41, 11 for each beam.
-42, ..., 11-48, and the reception quality comparison unit 11-5 compares the measured values for each beam, and the reception quality comparison unit 11-5 receives the information indicating the beam with the best reception quality. Notify the signal selection unit 11-6.
【００１３】受信信号選択部１１−６は、受信品質比較
部１１−５から通知されるビーム選択情報に従って、１
つのビームの受信信号を選択してＲＡＫＥ合成部１１−
７に出力し、ＲＡＫＥ合成部１１−７は、パス対応に備
えられた同様の構成の指向性ビーム切替受信機からの出
力信号をＲＡＫＥ合成し、合成信号を復号部１１−８に
出力し、復号部１１−８は復号処理を行って復号データ
を出力する。The reception signal selection unit 11-6 sets 1 according to the beam selection information notified from the reception quality comparison unit 11-5.
RAKE combiner 11-
7, the RAKE combining section 11-7 RAKE combines the output signals from the directional beam switching receivers of the same configuration provided for the path correspondence, and outputs the combined signal to the decoding section 11-8. The decoding unit 11-8 performs the decoding process and outputs the decoded data.
【００１４】[0014]
【発明が解決しようとする課題】スイッチドビームアン
テナを用いた指向性ビーム切替受信機は、通信対象のユ
ーザ端末が移動することにより、受信信号の品質が最良
となるビームが変化するために、予め準備した全てのビ
ームからの受信信号を復調（同期検波）して受信し、各
ビーム毎の受信品質を測定し、受信品質が最良となるビ
ームの受信信号を選択する手段が必要となる。In the directional beam switching receiver using the switched beam antenna, the beam that gives the best quality of the received signal changes due to the movement of the user terminal to be communicated. A means for demodulating (coherent detection) the received signals from all the beams prepared in advance and receiving them, measuring the receiving quality of each beam, and selecting the receiving signal of the beam having the best receiving quality is required.
【００１５】このため、予め準備した各ビーム分の復調
（同期検波）器を備える必要があった。本発明は、スイ
ッチドビームアンテナを用いた指向性ビーム切替受信機
において、予め形成した全てのビームの受信信号に対す
る復調（同期検波）器を備える必要がなく、その分、復
調（同期検波）器を削減し、回路規模を縮小することが
できる指向性ビーム切替受信機を提供することを目的と
する。Therefore, it is necessary to provide a demodulator (synchronous detector) for each beam prepared in advance. The present invention, in a directional beam switching receiver using a switched beam antenna, does not need to include a demodulation (synchronous detection) device for reception signals of all beams formed in advance, and accordingly, the demodulation (synchronization detection) device It is an object of the present invention to provide a directional beam switching receiver that can reduce the circuit size and the circuit size.
【００１６】[0016]
【課題を解決するための手段】本発明の指向性ビーム切
替受信機は、（１）複数のアンテナ素子により、通信対
象ユーザ端末に対して指向性ビームを向けて信号を受信
する受信機において、通信対象ユーザ端末に向けるメイ
ンビームと、該メインビームの両側に該メインビームと
僅かに方向が異なる２つのサブビームを形成する手段
と、該２つのサブビームにおける受信電力の相対関係を
指標として、次周期のビーム形成におけるメインビーム
及び２つのサブビームの指向性を切り替える手段とを備
えたものである。The directional beam switching receiver of the present invention is (1) a receiver for receiving a signal by directing a directional beam to a user terminal to be communicated by a plurality of antenna elements, A main beam directed to the user terminal to be communicated, a means for forming two sub-beams on both sides of the main beam, the directions of which are slightly different from the main beam, and the next cycle using the relative relationship between the received powers of the two sub-beams as indices. And a means for switching the directivities of the main beam and the two sub-beams in the beam forming.
【００１７】また、（２）前記２つのサブビームにおけ
る受信電力の相対関係として、２つのサブビームにおけ
るそれぞれの信号電力対雑音電力比の相対関係を指標と
したことを特徴とするものである。(2) The relative relationship between the received powers of the two sub-beams is characterized in that the relative relationship of the signal power to noise power ratios of the two sub-beams is used as an index.
【００１８】また、（３）前記２つのサブビームにおけ
る受信電力の相対関係として、複数パスのメインビーム
のうち、受信電力が最大となるメインビームのパスに付
随する２つのサブビームにおける受信電力の相対関係を
指標としたことを特徴とするものである。(3) As the relative relationship between the received powers of the two sub-beams, the relative relationship between the received powers of the two sub-beams associated with the path of the main beam having the maximum received power among the main beams of the plurality of paths. Is used as an index.
【００１９】また、（４）前記２つのサブビームにおけ
る受信電力の相対関係として、複数パスのメインビーム
のうち、信号対干渉電力が最大となるメインビームのパ
スに付随する２つのサブビームにおける信号対干渉電力
の相対関係を指標としたことを特徴とするものである。(4) As a relative relationship between the received powers of the two sub-beams, the signal-to-interference of the two sub-beams associated with the path of the main beam having the maximum signal-to-interference power among the main beams of the plurality of paths. It is characterized by using the relative relationship of electric power as an index.
【００２０】また、（５）前記２つのサブビームにおけ
る受信電力の相対関係として、複数パスのメインビーム
のうち、受信電力又は信号対干渉電力が最大となるメイ
ンビームのパスに付随する２つのサブビームにおける受
信電力又は信号対干渉電力の相対関係を指標とするとと
もに、該指標を基に全パスに対して共通に次周期のビー
ム形成におけるメインビーム及び２つのサブビームの指
向性を切り替えることを特徴とするものである。(5) As to the relative relationship between the received powers of the two sub-beams, among the main beams of a plurality of paths, the two sub-beams associated with the path of the main beam where the received power or the signal-to-interference power is maximum. The present invention is characterized in that the received power or the relative relationship of signal-to-interference power is used as an index, and the directivity of the main beam and two sub-beams in beam forming of the next cycle is commonly switched for all paths based on the index. It is a thing.
【００２１】[0021]
【発明の実施の形態】図１に本発明による指向性ビーム
切替受信機の基本構成例を示す。同図に示すように、各
アンテナ毎の逆拡散部１−１１〜１−１４により逆拡散
した信号に対して、通信対象ユーザ端末に向けるメイン
ビームと、該メインビームの両側に該メインビームと僅
かに方向が異なる２つのサブビームを形成するために、
各アンテナ毎に各ビーム対応にそれぞれ異なるウェイト
値ＷＭ＿１〜ＷＭ＿４，ＷＳ１＿１，ＷＳ１＿２，ＷＳ
２＿１，ＷＳ２＿２を乗じて位相回転を行うことによ
り、各ビームを形成する。1 shows an example of the basic configuration of a directional beam switching receiver according to the present invention. As shown in the figure, with respect to the signals despread by the despreading units 1-11 to 1-14 for each antenna, the main beam directed to the communication target user terminal and the main beams on both sides of the main beam are provided. To form two sub-beams with slightly different directions,
Different weight values WM_1 to WM_4, WS1_1, WS1_2, WS for each beam for each antenna
Each beam is formed by multiplying 2_1 and WS2_2 and performing phase rotation.
【００２２】図２に上記ウェイト値の乗算により形成す
るメインビームとその両側の２つのサブビームのパター
ン例を示す。メインビームに対して２つのサブビーム＃
１，＃２は、一例として３［ｄＢ］電力が減衰し、メイ
ンビームの左右それぞれに僅かに異なる角度Δθの方向
にビームを形成したビームパターン例を示している。FIG. 2 shows a pattern example of the main beam formed by the multiplication of the weight values and two sub-beams on both sides of the main beam. 2 sub-beams for main beam #
1 and # 2 show, as an example, beam pattern examples in which the power of 3 [dB] is attenuated and beams are formed in directions of slightly different angles Δθ on the left and right sides of the main beam.
【００２３】図１において、ウェイト値ＷＭ＿１〜ＷＭ
＿４を乗じて形成したメインビームの受信信号は、合成
部１−２１で合成され、同期検波部１−３１で同期検波
される。ウェイト値ＷＳ１＿１，ＷＳ１＿２を乗じて形
成した第１のサブビームの受信信号は合成部１−２２で
合成され、同期検波部１−３２で同期検波される。ウェ
イト値ＷＳ２＿１，ＷＳ２＿２を乗じて形成した第２の
サブビームの受信信号は合成部１−２３で合成され、同
期検波部１−３３で同期検波される。In FIG. 1, the weight values WM_1 to WM
The reception signal of the main beam formed by multiplying by _4 is combined by the combining unit 1-21, and is synchronously detected by the synchronous detection unit 1-31. The reception signals of the first sub-beams formed by multiplying the weight values WS1_1 and WS1_2 are combined by the combining unit 1-22 and are synchronously detected by the synchronous detection unit 1-32. The reception signals of the second sub-beam formed by multiplying the weight values WS2_1 and WS2_2 are combined by the combining unit 1-23, and are synchronously detected by the synchronous detection unit 1-33.
【００２４】第１及び第２のサブビームの各受信信号
は、それぞれ受信品質測定部１−４１，１−４２に入力
され、各受信品質測定部１−４１，１−４２で受信電力
を基に受信品質を測定し、測定結果をウェイト制御部１
−５に出力する。ウェイト制御部１−５は、各受信品質
測定部１−４１，１−４２から入力される２つのサブビ
ームにおける受信電力の相対関係を指標として、次周期
のビーム形成におけるメインビーム及び２つのサブビー
ムの指向性を切り替えるためのウェイト値ＷＭ＿１〜Ｗ
Ｍ＿４，ＷＳ１＿１，ＷＳ１＿２，ＷＳ２＿１，ＷＳ２
＿２を出力する。The received signals of the first and second sub-beams are input to the reception quality measuring units 1-41 and 1-42, respectively, and are received by the reception quality measuring units 1-41 and 1-42 based on the received power. The reception quality is measured, and the measurement result is weight control unit 1
Output to -5. The weight control unit 1-5 uses the relative relationship between the reception powers of the two sub-beams input from the reception quality measurement units 1-41 and 1-42 as an index, and determines the main beam and the two sub-beams in the beam formation of the next cycle. Weight values WM_1 to W for switching directivity
M_4, WS1_1, WS1_2, WS2_1, WS2
_2 is output.
【００２５】各受信品質測定部１−４１，１−４２から
入力される各サブビームの受信電力の相対関係は、通信
対象ユーザ端末の方向により近い方向のサブビームか
ら、品質のより良い受信信号が得られるので、それをも
とに通信対象ユーザ端末の移動方向を判定し、該移動方
向にビームを切替えるため、常に通信対象ユーザ端末に
対して指向性ビームを向けることができる。As for the relative relationship of the reception power of each sub-beam input from each reception quality measuring unit 1-41, 1-42, a reception signal with better quality is obtained from the sub-beam in the direction closer to the communication target user terminal. Therefore, the moving direction of the communication target user terminal is determined based on that, and the beam is switched to the moving direction, so that the directional beam can be always directed to the communication target user terminal.
【００２６】そして、メインビームの受信信号を同期検
波部１−３１で同期検波した復調信号はＲＡＫＥ合成部
１−６に出力され、ＲＡＫＥ合成部１−６はパス対応に
備えられた同様の構成の指向性ビーム切替受信機の復調
信号をＲＡＫＥ合成し、合成信号を復号部１−７に出力
し、復号部１−７は復号処理を行って復号データを出力
する。Then, the demodulated signal obtained by synchronously detecting the received signal of the main beam by the synchronous detection unit 1-31 is output to the RAKE combining unit 1-6, and the RAKE combining unit 1-6 has a similar structure provided corresponding to the path. RAKE combining the demodulated signals of the directional beam switching receiver of 1), outputting the combined signal to the decoding unit 1-7, and the decoding unit 1-7 performs decoding processing and outputs decoded data.
【００２７】なお、メインビーム及び２つのサブビーム
のビーム形成のための各ウェイト値ＷＭ＿１〜ＷＭ＿
４，ＷＳ１＿１，ＷＳ１＿２，ＷＳ２＿１，ＷＳ２＿２
は、各パス対応の各指向性ビーム切替受信機毎に異なる
値を設定し、各パス毎にその到来方向にビームを形成す
る構成とすることができる。The weight values WM_1 to WM_ for forming the beam of the main beam and the two sub beams.
4, WS1_1, WS1_2, WS2_1, WS2_2
Can be configured such that a different value is set for each directional beam switching receiver corresponding to each path, and a beam is formed in each arrival direction for each path.
【００２８】図３に本発明による指向性ビーム切替受信
機の第１の実施例を示す。この実施例は、図１に示した
指向性ビーム切替受信機の構成における１パス分の処理
を行う構成のみを示している。メインビームを形成する
ために４つのアンテナ素子に対する位相回転を行うウェ
イト値ＷＭ＿１〜ＷＭ＿４の乗算部とアンテナ間合成部
１−２１とに加え、４つのアンテナ素子の中から１つ置
きに取出した２つずつのアンテナ素子によりサブビーム
を形成するために位相回転を行うウェイト値ＷＳ１＿
１，ＷＳ１＿２及びＷＳ２＿１，ＷＳ２＿２の乗算部と
アンテナ間合成部１−２２及び１−２３とが付加され
る。FIG. 3 shows a first embodiment of the directional beam switching receiver according to the present invention. This embodiment shows only the configuration for performing the processing for one path in the configuration of the directional beam switching receiver shown in FIG. In addition to the multiplication unit of the weight values WM_1 to WM_4 and the inter-antenna combining unit 1-21 that performs phase rotation on the four antenna elements to form the main beam, every two of the four antenna elements are taken out. Weight value WS1_ for performing phase rotation to form a sub-beam by each antenna element
1, WS1_2 and WS2_1, WS2_2 multiplication sections and inter-antenna combining sections 1-22 and 1-23 are added.
【００２９】この構成により、メインビーム形成におけ
るアンテナ素子間距離と比較して、サブビーム形成にお
けるアンテナ素子間距離は２倍となる。このため、サブ
ビーム形成のアンテナ本数を１／２にしても、図２に示
すようなメインビームとサブビームとが同じビーム幅の
ビームパタンを形成することが可能となる。With this configuration, the distance between the antenna elements in forming the sub beam is doubled as compared with the distance between the antenna elements in forming the main beam. Therefore, even if the number of sub-beam forming antennas is reduced to 1/2, it is possible to form a beam pattern having the same beam width as the main beam and the sub-beam as shown in FIG.
【００３０】この第１の実施例では、サブビーム間の通
信品質を比較する指標として、各サブビームにおける受
信電力を使用する。各サブビームの同期検波部１−３
２，１−３３から出力される受信信号に対して、受信電
力測定部３−１，３−２によりそれぞれの電力を測定
し、ウェイト制御部３−３では、第１のサブビーム＃１
の受信電力から第２のサブビーム＃２の受信電力を減じ
た電力差分を求める。In the first embodiment, the received power in each sub-beam is used as an index for comparing the communication quality between sub-beams. Synchronous detection unit 1-3 of each sub-beam
With respect to the received signals output from the output terminals 2, 1-33, the received power measuring units 3-1 and 3-2 measure the respective powers, and the weight control unit 3-3 uses the first sub-beam # 1.
The power difference obtained by subtracting the received power of the second sub-beam # 2 from the received power of the second sub-beam # 2 is obtained.
【００３１】その電力差分は第１の比較部３−３１及び
第２の比較部３−３２に入力され、第１の比較部３−３
１は該電力差分が第１の閾値＃１を上回る場合には、ア
ップダウンカウンタ３−３３に対してカウントアップ指
示信号を出力する。一方、第２の比較部３−３２は該電
力差分が第２の閾値＃２を下回る場合には、アップダウ
ンカウンタ３−３３に対してカウントダウン指示信号を
出力する。The power difference is input to the first comparing section 3-31 and the second comparing section 3-32, and the first comparing section 3-3.
1 outputs a count-up instruction signal to the up-down counter 3-33 when the power difference exceeds the first threshold # 1. On the other hand, the second comparison unit 3-32 outputs a countdown instruction signal to the up / down counter 3-33 when the power difference is below the second threshold value # 2.
【００３２】アップダウンカウンタ３−３３のカウント
値は、ウェイトメモリ３−３４に入力され、ウェイトメ
モリ３−３４は該カウント値に応じて次周期のウェイト
値ＷＭ＿１〜ＷＭ＿４，ＷＳ１＿１，ＷＳ１＿２，ＷＳ
２＿１，ＷＳ２＿２を出力する。即ち、第１のサブビー
ム＃１が第２のサブビーム＃２より受信電力が大きい場
合、各ビームを第１のサブビーム＃１側に微小角回転さ
せたウェイト値を出力し、第２のサブビーム＃２が第１
のサブビーム＃１より受信電力が大きい場合、各ビーム
を第２のサブビーム＃２側に微小角回転させたウェイト
値を出力する。The count value of the up / down counter 3-33 is input to the weight memory 3-34, and the weight memory 3-34 has the weight values WM_1 to WM_4, WS1_1, WS1_2, WS of the next cycle according to the count value.
2_1 and WS2_2 are output. That is, when the reception power of the first sub-beam # 1 is larger than that of the second sub-beam # 2, the weight value obtained by rotating each beam by a small angle to the first sub-beam # 1 side is output, and the second sub-beam # 2 is output. Is the first
When the received power is larger than that of the sub beam # 1 of, the weight value obtained by rotating each beam by a small angle to the second sub beam # 2 side is output.
【００３３】通信対象ユーザ端末がメインビームの方向
から移動した場合に、２つのサブビームの受信電力状態
の監視結果を基に、その電力の強弱差に応じて通信対象
ユーザ端末の移動方向を判定し、該移動方向にビームを
切替えるため、常にメインビームを通信対象ユーザ端末
方向に向けることができる。When the communication target user terminal moves from the main beam direction, the moving direction of the communication target user terminal is determined according to the difference in power between the two sub beams based on the monitoring result of the reception power state. Since the beam is switched to the moving direction, the main beam can always be directed toward the communication target user terminal.
【００３４】図４に本発明による指向性ビーム切替受信
機の第２の実施例をを示す。この実施例は、２つのサブ
ビーム間の通信品質を対比する指標として、各サブビー
ムにおける受信信号の信号対干渉電力比（ＳＩＲ）を使
用するようにしたものである。即ち、図３の第１の実施
例における受信電力測定部３−１，３−２を、信号対干
渉電力比（ＳＩＲ）部４−１，４−２に代えたものであ
る。FIG. 4 shows a second embodiment of the directional beam switching receiver according to the present invention. In this embodiment, the signal-to-interference power ratio (SIR) of the received signal in each sub-beam is used as an index for comparing the communication quality between two sub-beams. That is, the received power measuring units 3-1 and 3-2 in the first embodiment of FIG. 3 are replaced with signal-to-interference power ratio (SIR) units 4-1 and 4-2.
【００３５】受信信号の信号対干渉電力比（ＳＩＲ）を
指標としたことにより、受信信号に大きな干渉成分が含
まれて受信信号電力が増大した場合におけるウェイト制
御部の誤制御を防ぐことができ、より正確にメインビー
ムを通信対象ユーザ端末方向に向けることが可能とな
る。By using the signal-to-interference power ratio (SIR) of the received signal as an index, it is possible to prevent erroneous control of the weight control unit when the received signal contains a large interference component and the received signal power increases. , It is possible to more accurately direct the main beam toward the communication target user terminal.
【００３６】図５に本発明による指向性ビーム切替受信
機の第３の実施例を示す。この実施例は、各パス毎にメ
インビームの受信電力を測定する受信電力測定部５−１
を設け、最大値検出部５−２により全パスの中からメイ
ンビームの受信電力が最大となっているパスを検出し、
受信電力最大のパスのメインビームに付随する２つのサ
ブビームをセレクタ５−３により選択し、該２つのサブ
ビームの受信電力のみを受信電力測定部５−４，５−５
で測定し、該測定結果を各パス対応のウェイト制御部３
−３に入力するようにしたものである。FIG. 5 shows a third embodiment of the directional beam switching receiver according to the present invention. In this embodiment, a reception power measuring unit 5-1 that measures the reception power of the main beam for each path.
The maximum value detection unit 5-2 detects the path having the maximum received power of the main beam from all paths,
The selector 5-3 selects two sub-beams associated with the main beam of the path having the maximum received power, and only the received powers of the two sub-beams are received power measuring units 5-4, 5-5.
In the weight control unit 3 for each path.
-3 is input.
【００３７】つまり、メインビームの受信電力レベルが
最も高いパスについてのみ、そのサブビームの受信電力
測定を行い、該受信電力測定結果により全パスのウェイ
ト制御を行う構成としたものである。これは、通信対象
ユーザ端末の移動により、全てのパスの到来方向が同様
に移動する場合に有効であり、この構成により、図３に
示した第１の実施例において各パス対応にそれぞれ備え
た２つのサブビームの受信電力測定部３−１，３−２
を、各パスに共通の１組の受信電力測定部５−４，５−
５のみを備えた構成とすることができ、回路規模の削減
を図ることが可能となる。That is, only the path having the highest received power level of the main beam, the received power of the sub beam is measured, and the weight control of all paths is performed based on the received power measurement result. This is effective in the case where the arrival directions of all paths similarly move due to the movement of the communication target user terminal, and this configuration provides for each path in the first embodiment shown in FIG. Received power measuring units 3-1 and 3-2 for two sub-beams
, A set of received power measuring units 5-4, 5-5 common to each path.
A configuration including only 5 can be provided, and the circuit scale can be reduced.
【００３８】図６に本発明による指向性ビーム切替受信
機の第４の実施例を示す。この実施例は、各パス毎にメ
インビームの信号対干渉電力比（ＳＩＲ）を測定する信
号対干渉電力比（ＳＩＲ）測定部６−１を設け、最大値
検出部５−２により全パスの中からメインビームの信号
対干渉電力比（ＳＩＲ）が最大となっているパスを検出
し、信号対干渉電力比（ＳＩＲ）のパスのメインビーム
に付随する２つのサブビームをセレクタ５−３により選
択し、該２つのサブビームの信号対干渉電力比（ＳＩ
Ｒ）のみを信号対干渉電力比（ＳＩＲ）測定部６−２，
６−３で測定し、該測定結果を各パス対応のウェイト制
御部３−３に入力するようにしたものである。FIG. 6 shows a fourth embodiment of the directional beam switching receiver according to the present invention. In this embodiment, a signal-to-interference power ratio (SIR) measuring unit 6-1 for measuring the main-beam signal-to-interference power ratio (SIR) is provided for each path, and the maximum value detecting unit 5-2 is used to detect all paths. The path having the maximum signal-to-interference power ratio (SIR) of the main beam is detected from the inside, and two sub-beams associated with the main beam of the path having the signal-to-interference power ratio (SIR) are selected by the selector 5-3. Then, the signal-to-interference power ratio (SI
R) only, the signal-to-interference power ratio (SIR) measuring unit 6-2,
6-3, and the measurement result is input to the weight controller 3-3 corresponding to each path.
【００３９】この構成により、メインビームの信号対干
渉電力比（ＳＩＲ）が最も高いパスについてのみ、その
サブビームの信号対干渉電力比（ＳＩＲ）測定を行い、
該測定結果により全パスのウェイト制御を行う。この構
成は第３の実施例と同様に、通信対象ユーザ端末の移動
により、全てのパスの到来方向が同様に移動する場合に
有効である。With this configuration, the signal-to-interference power ratio (SIR) of the sub-beam is measured only for the path having the highest signal-to-interference power ratio (SIR) of the main beam.
Weight control of all paths is performed based on the measurement result. Similar to the third embodiment, this configuration is effective when the arrival direction of all paths moves similarly due to the movement of the communication target user terminal.
【００４０】また、この実施例は、図４に示した第２の
実施例において各パス対応にそれぞれ備えた２つのサブ
ビームの信号対干渉電力比（ＳＩＲ）測定部４−１，４
−２を、各パスに共通の１組の信号対干渉電力比（ＳＩ
Ｒ）測定部６−２，６−３のみを備えたので、回路規模
の削減を図ることが可能になるとともに、受信信号に大
きな干渉成分が含まれることにより、受信信号電力が増
大した場合におけるウェイト制御部の誤制御を防ぐこと
ができ、より正確にメインビームを通信対象ユーザ端末
に対して向けることが可能となる。In this embodiment, the signal-to-interference power ratio (SIR) measuring units 4-1 and 4 of the two sub-beams provided for each path in the second embodiment shown in FIG. 4 are also provided.
-2 is a set of signal-to-interference power ratio (SI
R) Since only the measurement units 6-2 and 6-3 are provided, it is possible to reduce the circuit scale, and in the case where the received signal power increases due to the received signal containing a large interference component. It is possible to prevent erroneous control of the weight control unit and more accurately direct the main beam to the communication target user terminal.
【００４１】図７に本発明による指向性ビーム切替受信
機の第５の実施例を示す。この実施例は、図５の第３の
実施例においてパス毎に行ったウェイト制御を、全パス
の中からメインビームの受信電力が最大となっているパ
スのメインビームに付随する２つのサブビームのみの受
信電力を使用して、全パス共通にウェイト制御部７−１
でウェイト制御を行う構成としたものである。FIG. 7 shows a fifth embodiment of the directional beam switching receiver according to the present invention. In this embodiment, the weight control performed for each path in the third embodiment of FIG. 5 is performed only for the two sub-beams associated with the main beam of the path in which the received power of the main beam is the maximum among all the paths. Of the weight control unit 7-1 using the received power of
In this configuration, weight control is performed.
【００４２】ウェイト制御部７−１から出力されるウェ
イト値ＷＭ＿１〜ＷＭ＿４，ＷＳ１＿１，ＷＳ１＿２，
ＷＳ２＿１，ＷＳ２＿２は、各パス対応の指向性ビーム
切替受信機に共通に同一値として与えられる。この第５
の実施例は、各パスの到来角分散がメインビーム幅に対
して十分小さいときに有効であり、この構成により、図
５の第３の実施例に対して更に回路規模を削減すること
が可能となる。The weight values WM_1 to WM_4, WS1_1, WS1_2 and the weight values output from the weight controller 7-1.
WS2_1 and WS2_2 are commonly given as the same value to the directional beam switching receiver corresponding to each path. This fifth
This embodiment is effective when the arrival angle dispersion of each path is sufficiently small with respect to the main beam width, and this configuration can further reduce the circuit scale as compared with the third embodiment of FIG. Becomes
【００４３】図８に本発明による指向性ビーム切替受信
機の第６の実施例を示す。この実施例は、図６の第５の
実施例においてパス毎に行ったウェイト制御を、全パス
の中からメインビームの信号対干渉電力比（ＳＩＲ）が
最大となっているパスのメインビームに付随する２つの
サブビームのみの信号対干渉電力比（ＳＩＲ）を使用し
て、全パス共通にウェイト制御部７−１でウェイト制御
を行う構成としたものである。FIG. 8 shows a directional beam switching receiver according to a sixth embodiment of the present invention. In this embodiment, the weight control performed for each path in the fifth embodiment of FIG. 6 is applied to the main beam of the path having the maximum signal-to-interference power ratio (SIR) of the main beam among all the paths. By using the signal-to-interference power ratio (SIR) of only two associated sub-beams, the weight control unit 7-1 performs weight control commonly for all paths.
【００４４】この第６の実施例は、第５の実施例と同様
に、ウェイト制御部７−１から出力されるウェイト値Ｗ
Ｍ＿１〜ＷＭ＿４，ＷＳ１＿１，ＷＳ１＿２，ＷＳ２＿
１，ＷＳ２＿２は、各パス対応の指向性ビーム切替受信
機に共通に同一値として与えられ、各パスの到来角分散
がメインビーム幅に対して十分小さいときに有効であ
り、図６の第４の実施例に対して更に回路規模を削減す
ることが可能となる。In the sixth embodiment, similarly to the fifth embodiment, the weight value W output from the weight controller 7-1.
M_1 to WM_4, WS1_1, WS1_2, WS2_
1, WS2_2 are commonly given as the same value to the directional beam switching receivers corresponding to the respective paths, and are effective when the arrival angle dispersion of each path is sufficiently smaller than the main beam width. It is possible to further reduce the circuit scale as compared with the above embodiment.
【００４５】（付記１） 複数のアンテナ素子により、
通信対象ユーザ端末に対して指向性ビームを向けて信号
を受信する受信機において、通信対象ユーザ端末に向け
るメインビームと、該メインビームの両側に該メインビ
ームと僅かに方向が異なる２つのサブビームを形成する
手段と、該２つのサブビームにおける受信電力の相対関
係を指標として、次周期のビーム形成におけるメインビ
ーム及び２つのサブビームの指向性を切り替える手段と
を備えたことを特徴とする指向性ビーム切替受信機。
（付記２） 前記２つのサブビームにおける受信電力の
相対関係として、２つのサブビームにおけるそれぞれの
信号電力対雑音電力比の相対関係を指標としたことを特
徴とする付記１記載の指向性ビーム切替受信機。
（付記３） 前記２つのサブビームにおける受信電力の
相対関係として、複数パスのメインビームのうち、受信
電力が最大となるメインビームのパスに付随する２つの
サブビームにおける受信電力の相対関係を指標としたこ
とを特徴とする付記１記載の指向性ビーム切替受信機。
（付記４） 前記２つのサブビームにおける受信電力の
相対関係として、複数パスのメインビームのうち、信号
対干渉電力が最大となるメインビームのパスに付随する
２つのサブビームにおける信号対干渉電力の相対関係を
指標としたことを特徴とする付記１記載の指向性ビーム
切替受信機。
（付記５） 前記２つのサブビームにおける受信電力の
相対関係として、複数パスのメインビームのうち、受信
電力又は信号対干渉電力が最大となるメインビームのパ
スに付随する２つのサブビームにおける受信電力又は信
号対干渉電力の相対関係を指標とするとともに、該指標
を基に全パスに対して共通に次周期のビーム形成におけ
るメインビーム及び２つのサブビームの指向性を切り替
えることを特徴とする付記１に記載の指向性ビーム切替
受信機。
（付記６） 前記２つのサブビームにおける受信電力の
相対関係として、複数パスのメインビームのうち、受信
電力が最大となるメインビームのパスに付随する２つの
サブビームにおける受信電力の相対関係を指標とすると
ともに、該指標を基に全パスに対して共通に次周期のビ
ーム形成におけるメインビーム及び２つのサブビームの
指向性を切り替えることを特徴とする付記１に記載の指
向性ビーム切替受信機。
（付記７） 前記２つのサブビームにおける受信電力の
相対関係として、複数パスのメインビームのうち、信号
対干渉電力が最大となるメインビームのパスに付随する
２つのサブビームにおける信号対干渉電力の相対関係を
指標とするとともに、該指標を基に全パスに対して共通
に次周期のビーム形成におけるメインビーム及び２つの
サブビームの指向性を切り替えることを特徴とする付記
１に記載の指向性ビーム切替受信機。(Supplementary Note 1) By a plurality of antenna elements,
In a receiver for receiving a signal by directing a directional beam to a communication target user terminal, a main beam directed to the communication target user terminal and two sub-beams on both sides of the main beam that are slightly different in direction from the main beam are provided. Directional beam switching, comprising: forming means; and means for switching the directivity of the main beam and the two sub-beams in the beam formation of the next period using the relative relationship between the reception powers of the two sub-beams as an index. Receiving machine. (Supplementary Note 2) The directional beam switching receiver according to Supplementary note 1, wherein the relative relationship between the signal power and the noise power ratio in the two sub-beams is used as an index as the relative relationship between the received powers in the two sub-beams. . (Supplementary Note 3) As the relative relationship between the received powers of the two sub-beams, the relative relationship between the received powers of the two sub-beams associated with the path of the main beam having the maximum received power among the main beams of the plurality of paths is used as an index. A directional beam switching receiver according to appendix 1, characterized in that. (Supplementary Note 4) As for the relative relationship between the received powers of the two sub-beams, the relative relationship between the signal-to-interference powers of the two sub-beams associated with the main beam path having the maximum signal-to-interference power among the main beams of the plurality of paths. The directional beam switching receiver as set forth in appendix 1, wherein: (Supplementary Note 5) As a relative relationship between the reception powers of the two sub-beams, reception powers or signals of the two sub-beams associated with the main beam path having the maximum reception power or signal-to-interference power among the main beams of the plurality of paths An additional feature is that the relative relationship of the interference power is used as an index, and the directivity of the main beam and the two sub beams in beam forming of the next cycle is commonly switched for all paths based on the index. Directional beam switching receiver. (Supplementary Note 6) As the relative relationship between the received powers of the two sub-beams, the relative relationship between the received powers of the two sub-beams associated with the path of the main beam having the maximum received power among the main beams of the plurality of paths is used as an index. At the same time, the directional beam switching receiver according to appendix 1, wherein the directivity of the main beam and the two sub beams in beam forming of the next cycle is switched commonly for all paths based on the index. (Supplementary Note 7) As the relative relationship between the received powers of the two sub-beams, the relative relationship between the signal-to-interference powers of the two sub-beams associated with the path of the main beam having the maximum signal-to-interference power among the main beams of the plurality of paths. And the directivity of the main beam and the two sub-beams in the beam forming of the next cycle is switched commonly for all paths based on the index. Machine.
【００４６】[0046]
【発明の効果】以上説明したように、本発明によれば、
通信対象ユーザ端末に向けるメインビームと、該メイン
ビームの両側に該メインビームと僅かに方向が異なる２
つのサブビームを形成し、該２つのサブビームにおける
受信電力の相対関係を指標として、次周期のビーム形成
におけるメインビーム及び２つのサブビームの指向性を
切り替えることにより、従来のスイッチドビームアンテ
ナ受信機において予め定められた複数の異なる方向に形
成した全てのビームの受信信号を復調処理する復調処理
部を不要とし、メインビーム及び２つのサブビームの受
信信号を復調処理する復調処理部のみを備えればよく、
回路規模の削減を図ることが可能となる。As described above, according to the present invention,
A main beam directed to a user terminal to be communicated with and a direction slightly different from the main beam on both sides of the main beam 2
In the conventional switched beam antenna receiver, two sub-beams are formed, and the directivity of the main beam and the two sub-beams in the beam formation of the next cycle is switched using the relative relationship between the received powers of the two sub-beams as an index. It is not necessary to provide a demodulation processing unit that demodulates the reception signals of all the beams formed in a plurality of different defined directions, and only the demodulation processing unit that demodulates the reception signals of the main beam and the two sub beams may be provided.
It is possible to reduce the circuit scale.
【図１】本発明による指向性ビーム切替受信機の基本構
成例を示す図である。FIG. 1 is a diagram showing a basic configuration example of a directional beam switching receiver according to the present invention.
【図２】本発明によるメインビームと２つのサブビーム
のパターン例を示す図である。FIG. 2 is a diagram showing an example of patterns of a main beam and two sub beams according to the present invention.
【図３】本発明による指向性ビーム切替受信機の第１の
実施例を示す図である。FIG. 3 is a diagram showing a first embodiment of a directional beam switching receiver according to the present invention.
【図４】本発明による指向性ビーム切替受信機の第２の
実施例を示す図である。FIG. 4 is a diagram showing a second embodiment of the directional beam switching receiver according to the present invention.
【図５】本発明による指向性ビーム切替受信機の第３の
実施例を示す図である。FIG. 5 is a diagram showing a third embodiment of the directional beam switching receiver according to the present invention.
【図６】本発明による指向性ビーム切替受信機の第４の
実施例を示す図である。FIG. 6 is a diagram showing a fourth embodiment of a directional beam switching receiver according to the present invention.
【図７】本発明による指向性ビーム切替受信機の第５の
実施例を示す図である。FIG. 7 is a diagram showing a fifth embodiment of the directional beam switching receiver according to the present invention.
【図８】本発明による指向性ビーム切替受信機の第６の
実施例を示す図である。FIG. 8 is a diagram showing a sixth embodiment of a directional beam switching receiver according to the present invention.
【図９】逆拡散後の信号に対する他ユーザの送信信号か
らの干渉成分の影響を示す図である。FIG. 9 is a diagram showing an influence of an interference component from a transmission signal of another user on a signal after despreading.
【図１０】従来のスイッチドビームアンテナ受信機で形
成されるビームパターンの例を示す図である。FIG. 10 is a diagram showing an example of a beam pattern formed by a conventional switched beam antenna receiver.
【図１１】スイッチドビームアンテナを用いた従来の指
向性ビーム切替受信機を示す図である。FIG. 11 is a diagram showing a conventional directional beam switching receiver using a switched beam antenna.
１−１１〜１−１４ 逆拡散部
１−２１ メインビームの合成部
１−２２ 第１のサブビームの合成部
１−２３ 第２のサブビームの合成部
１−３１ メインビームの同期検波部
１−３２ 第１のサブビームの同期検波部
１−３３ 第２のサブビームの同期検波部
１−４１ 第１のサブビームの受信品質測定部
１−４２ 第２のサブビームの受信品質測定部
１−５ ウェイト制御部
１−６ ＲＡＫＥ合成部
１−７ 復号部
ＷＭ＿１〜ＷＭ＿４ メインビーム形成のウェイト値
ＷＳ１＿１，ＷＳ１＿２ 第１のサブビーム形成のウェ
イト値
ＷＳ２＿１，ＷＳ２＿２ 第２のサブビーム形成のウェ
イト値1-11 to 1-14 despreading unit 1-21 main beam combining unit 1-22 first sub-beam combining unit 1-23 second sub-beam combining unit 1-31 main beam synchronous detection unit 1-32 First sub-beam synchronous detection unit 1-33 Second sub-beam synchronous detection unit 1-41 First sub-beam reception quality measurement unit 1-42 Second sub-beam reception quality measurement unit 1-5 Weight control unit 1 -6 RAKE combining section 1-7 Decoding section WM_1 to WM_4 Main beam forming weight values WS1_1, WS1_2 Second sub beam forming weight values WS2_1, WS2_2 Second sub beam forming weight values
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０４Ｌ 1/06 Ｈ０４Ｊ 13/00 Ｄ Ｆターム(参考） 5K022 EE02 EE31 5K059 CC03 CC04 DD31 5K067 AA41 CC10 CC24 GG11 KK02 KK03 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) H04L 1/06 H04J 13/00 DF term (reference) 5K022 EE02 EE31 5K059 CC03 CC04 DD31 5K067 AA41 CC10 CC24 GG11 KK02 KK03
Claims (5)
ーザ端末に対して指向性ビームを向けて信号を受信する
受信機において、 通信対象ユーザ端末に向けるメインビームと、該メイン
ビームの両側に該メインビームと僅かに方向が異なる２
つのサブビームを形成する手段と、 該２つのサブビームにおける受信電力の相対関係を指標
として、次周期のビーム形成におけるメインビーム及び
２つのサブビームの指向性を切り替える手段とを備えた
ことを特徴とする指向性ビーム切替受信機。1. In a receiver for receiving a signal by directing a directional beam to a communication target user terminal by a plurality of antenna elements, a main beam directed to the communication target user terminal and the main beam on both sides of the main beam. 2 direction slightly different from beam
Directing, characterized in that it has means for forming one sub-beam and means for switching the directivity of the main beam and the two sub-beams in the beam formation of the next period using the relative relationship of the received power in the two sub-beams as an index. Beam switching receiver.
の相対関係として、２つのサブビームにおけるそれぞれ
の信号電力対雑音電力比の相対関係を指標としたことを
特徴とする請求項１記載の指向性ビーム切替受信機。2. The directional beam switching according to claim 1, wherein the relative relationship between the received powers of the two sub-beams is based on the relative relationship of the signal power to noise power ratio of the two sub-beams. Receiving machine.
の相対関係として、複数パスのメインビームのうち、受
信電力が最大となるメインビームのパスに付随する２つ
のサブビームにおける受信電力の相対関係を指標とした
ことを特徴とする請求項１記載の指向性ビーム切替受信
機。3. The relative relationship between the received powers of the two sub-beams is an index of the relative relationship between the received powers of the two sub-beams associated with the path of the main beam having the maximum received power among the main beams of the plurality of paths. The directional beam switching receiver according to claim 1, characterized in that.
の相対関係として、複数パスのメインビームのうち、信
号対干渉電力が最大となるメインビームのパスに付随す
る２つのサブビームにおける信号対干渉電力の相対関係
を指標としたことを特徴とする請求項１記載の指向性ビ
ーム切替受信機。4. The relative relationship between the received powers of the two sub-beams is a relative relationship between the signal-to-interference powers of the two sub-beams associated with the main beam path having the maximum signal-to-interference power among the main beams of the plurality of paths. The directional beam switching receiver according to claim 1, wherein the relationship is used as an index.
の相対関係として、複数パスのメインビームのうち、受
信電力又は信号対干渉電力が最大となるメインビームの
パスに付随する２つのサブビームにおける受信電力又は
信号対干渉電力の相対関係を指標とするとともに、 該指標を基に全パスに対して共通に次周期のビーム形成
におけるメインビーム及び２つのサブビームの指向性を
切り替えることを特徴とする請求項１に記載の指向性ビ
ーム切替受信機。5. As a relative relationship between the reception powers of the two sub-beams, among the main beams of a plurality of paths, the reception powers of the two sub-beams associated with the path of the main beam having the maximum reception power or signal-to-interference power, or The directivity of the main beam and the two sub-beams in the beam forming of the next cycle is commonly used for all paths based on the relative relationship between signal-to-interference power as an index. Directional beam switching receiver described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002096750A JP3952377B2 (en) | 2002-03-29 | 2002-03-29 | Directional beam switching receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002096750A JP3952377B2 (en) | 2002-03-29 | 2002-03-29 | Directional beam switching receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003298483A true JP2003298483A (en) | 2003-10-17 |
| JP3952377B2 JP3952377B2 (en) | 2007-08-01 |
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ID=29387521
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002096750A Expired - Fee Related JP3952377B2 (en) | 2002-03-29 | 2002-03-29 | Directional beam switching receiver |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007215008A (en) * | 2006-02-10 | 2007-08-23 | Nippon Telegr & Teleph Corp <Ntt> | Wireless communication method |
| JP2009207089A (en) * | 2008-02-29 | 2009-09-10 | Dx Antenna Co Ltd | Reception system |
| US11081791B2 (en) | 2016-10-28 | 2021-08-03 | Nec Corporation | Wireless communication device, control method, and program |
| WO2023050208A1 (en) * | 2021-09-29 | 2023-04-06 | 北京小米移动软件有限公司 | Beam switching, evaluating, and reporting method and apparatus, communication apparatus, and storage medium |
-
2002
- 2002-03-29 JP JP2002096750A patent/JP3952377B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007215008A (en) * | 2006-02-10 | 2007-08-23 | Nippon Telegr & Teleph Corp <Ntt> | Wireless communication method |
| JP4633644B2 (en) * | 2006-02-10 | 2011-02-16 | 日本電信電話株式会社 | Wireless communication method |
| JP2009207089A (en) * | 2008-02-29 | 2009-09-10 | Dx Antenna Co Ltd | Reception system |
| US11081791B2 (en) | 2016-10-28 | 2021-08-03 | Nec Corporation | Wireless communication device, control method, and program |
| WO2023050208A1 (en) * | 2021-09-29 | 2023-04-06 | 北京小米移动软件有限公司 | Beam switching, evaluating, and reporting method and apparatus, communication apparatus, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3952377B2 (en) | 2007-08-01 |
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