JP2001016152A - Wireless repeater - Google Patents
Wireless repeaterInfo
- Publication number
- JP2001016152A JP2001016152A JP11184759A JP18475999A JP2001016152A JP 2001016152 A JP2001016152 A JP 2001016152A JP 11184759 A JP11184759 A JP 11184759A JP 18475999 A JP18475999 A JP 18475999A JP 2001016152 A JP2001016152 A JP 2001016152A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- transmission
- antenna
- quadrature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、親局送信信号の
中継装置に係り、特に中継装置の出力信号がその中継装
置の受信アンテナに廻り込む場合に、その廻り込み干渉
信号を除去でき、２本以上の受信アンテナを設置するこ
とによるダイバーシチ受信中継が可能な無線中継装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay apparatus for transmitting a transmission signal from a master station, and more particularly to a relay apparatus capable of removing an interfering signal when an output signal of the relay apparatus goes around a receiving antenna of the relay apparatus. The present invention relates to a wireless relay apparatus capable of performing diversity reception relay by installing more than two reception antennas.
【０００２】[0002]
【従来の技術】一般的に放送波中継装置は、親局が送出
した送信信号を受信アンテナで受信し、増幅して送信ア
ンテナより送信することにより、親局送信信号を中継す
るものである。その際、放送波中継装置の送信アンテナ
と受信アンテナとの間に結合性があると、放送波中継装
置からの送信出力信号が受信アンテナに廻り込み、発振
を起こす問題がある。2. Description of the Related Art In general, a broadcast wave relay apparatus relays a transmission signal of a master station by receiving a transmission signal transmitted by a master station with a reception antenna, amplifying the transmission signal, and transmitting the amplified signal from the transmission antenna. At this time, if there is connectivity between the transmitting antenna and the receiving antenna of the broadcast wave relay device, there is a problem that a transmission output signal from the broadcast wave relay device goes around to the receiving antenna and causes oscillation.
【０００３】この問題を解決する方法として、従来は、
図４に示す放送波中継装置の送信アンテナと受信アンテ
ナとを分離して設置する分離方式を用いることや、図５
に示す非分離方式であっても、送信アンテナと受信アン
テナ間の距離を十分に取る構成とすることにより、受信
アンテナに入射する放送波中継装置からの出力信号の廻
り込み干渉信号の受信レベルを下げる方法が取られてい
る。これらは田中他：”テレビ放送波中継における同一
周波数送受信空中線間結合量測定〜ＳＦＮの実現性
〜”，信学技報，OCS96-128 (1997-03)に示されるもの
である。As a method for solving this problem, conventionally,
A separation method in which the transmission antenna and the reception antenna of the broadcast wave relay device shown in FIG.
Even with the non-separation method shown in (1), by taking a sufficient distance between the transmitting antenna and the receiving antenna, it is possible to reduce the reception level of the sneak interference signal of the output signal from the broadcast wave relay device incident on the receiving antenna. A method of lowering has been taken. These are shown in Tanaka et al .: "Measurement of Coupling between Antennas Transmitting and Receiving the Same Frequency in Television Broadcasting Waves: Feasibility of SFN", IEICE Technical Report, OCS96-128 (1997-03).
【０００４】しかし、都心部においては放送波中継装置
の設置位置を確保することが困難な状況にあり、且つ送
受信アンテナ間の距離を十分にとるようなことは立地条
件の制約から難しいのが現状である。また、放送波中継
においては、１度の中継でなく、複数の中継装置を中継
する多段中継方式が考えられているので、多段中継によ
り、廻り込み波の影響が蓄積されていき、特性劣化が生
じてしまうものと考えられる。However, in the downtown area, it is difficult to secure the installation position of the broadcast wave relay device, and it is difficult to secure a sufficient distance between the transmitting and receiving antennas due to restrictions on location. It is. Also, in broadcast wave relaying, a multi-stage relay system in which a plurality of relay devices are relayed, rather than a single relay, is being considered. It is thought to occur.
【０００５】従って、送受信アンテナ間の距離が短いま
まで、送信出力信号の廻り込み干渉信号をキャンセルで
きる廻り込み波キャンセラ機能を持つ放送波中継装置
は、都心部での放送波中継装置設置スペースの問題を解
決する上でも、多段中継方式においても、干渉信号成分
が抑制されるので、大きなメリットを持つ。Accordingly, a broadcast wave repeater having a loop wave canceller function capable of canceling a loop interference signal of a transmission output signal while keeping the distance between the transmitting and receiving antennas short, requires less space for installing the broadcast wave relay apparatus in the city center. In solving the problem and in the multi-stage relay system, interference signal components are suppressed, so that there is a great merit.
【０００６】[0006]
【発明が解決しようとする課題】従来手法では、 ・放送波中継装置の送信アンテナと受信アンテナ間で、
十分な結合減衰量を得るために、送信アンテナと受信ア
ンテナ間の距離を十分に取っていたが、そのために放送
波中継装置のアンテナの物理的実寸法が大きくなってし
まい、設置場所に制限ができてしまう。 ・多段中継を行う場合、放送波中継装置の送信アンテナ
から受信アンテナへの廻り込み干渉信号成分が蓄積され
ていき、特性劣化が生じてしまう、などの問題点があっ
た． 本発明は、多段中継を行う場合、放送波中継装置の送信
アンテナから受信アンテナへの廻り込み干渉信号成分を
除去し、特性劣化を防ぎ、送信アンテナと受信アンテナ
の立地条件を緩和できる中継装置を得ることを目的とす
る。In the conventional method, there are the following: between a transmitting antenna and a receiving antenna of a broadcast wave relay device;
In order to obtain a sufficient coupling attenuation, the distance between the transmitting antenna and the receiving antenna is sufficiently large, but the actual physical dimensions of the antenna of the broadcast wave relay device become large, and the installation location is limited. I can do it. -When multi-stage relay is performed, there is a problem that the sneak-through interference signal component from the transmitting antenna to the receiving antenna of the broadcast wave relay device is accumulated and the characteristic is deteriorated. The present invention provides a relay device that eliminates an interference signal component from a transmitting antenna to a receiving antenna of a broadcast wave relay device when performing multistage relaying, prevents deterioration of characteristics, and reduces the location conditions of the transmitting antenna and the receiving antenna. The purpose is to gain.
【０００７】[0007]
【課題を解決するための手段】上述の目的を達成するた
めに、第１の発明に係わる無線中継装置は、２つ以上の
ブランチを構成する受信アンテナと、中継装置の送信ア
ンテナから送信した信号が、前記受信アンテナに廻り込
み、廻り込み干渉信号を受信すると共に、それぞれのブ
ランチで廻り込み波をキャンセルするキャンセラと、こ
のキャンセラの出力を合成する結合器と、を有すること
により、ダイバーシチ合成受信中継を行うものである。In order to achieve the above object, a wireless relay device according to a first aspect of the present invention includes a receiving antenna constituting two or more branches, and a signal transmitted from a transmitting antenna of the relay device. Has a canceller for sneaking into the receiving antenna and receiving a sneak interference signal and canceling a sneak wave in each branch, and a coupler for combining the outputs of the cancellers, thereby achieving diversity combining reception. It relays.
【０００８】第２の発明に係わる無線中継装置は、親局
送信信号の到来方向に指向性を持つ２本以上の指向性受
信アンテナと、前記受信アンテナで受信された受信信号
を増幅する第１のアンプと、前記第１のアンプからの出
力を直交検波して受信直交信号に変換する直交検波器
と、その受信直交信号とあらかじめ記憶しておいた信号
との複素相関を計算する複素相関器と、前記あらかじめ
信号を記憶し、蓄積しておくバッファメモリと、前記複
素相関器出力から推定された伝送路情報を用いて過去の
キャンセラ制御値を更新する動作を繰り返す伝送路情報
制御器と前記伝送路情報制御器から出力された伝送路情
報とあらかじめ記憶しておいた信号から、廻り込み干渉
信号のレプリカを生成するレプリカ生成器と、前記受信
アンテナで受信された信号から、前記レプリカ生成器よ
り出力されたキャンセラ信号を減算してキャンセラ出力
信号を出力する減算器と、各アンテナのブランチにおけ
る減算器出力を合成する結合器と、その結合器出力信号
を直交変調する直交変調器と、その直交変調した信号を
増幅して中継装置出力信号を出力する第２のアンプと、
前記受信アンテナ方向に中継信号出力の指向性を持たな
いように配した指向性送信アンテナまたは無指向性送信
アンテナと、を有するものである。According to a second aspect of the present invention, there is provided a radio relay apparatus comprising: two or more directional receiving antennas having directivity in an arrival direction of a master station transmission signal; and a first amplifying a reception signal received by the reception antenna. , An orthogonal detector for orthogonally detecting an output from the first amplifier and converting it to a received orthogonal signal, and a complex correlator for calculating a complex correlation between the received orthogonal signal and a signal stored in advance A buffer memory for storing and storing the signal in advance, a transmission path information controller for repeating an operation of updating a past canceller control value using transmission path information estimated from the output of the complex correlator, and From the transmission line information output from the transmission line information controller and a signal stored in advance, a replica generator that generates a replica of the wraparound interference signal, A subtractor for subtracting the canceller signal output from the replica generator from the signal to output a canceller output signal; a combiner for combining the subtractor outputs at the branches of each antenna; and a quadrature modulation of the combiner output signal A quadrature modulator, a second amplifier that amplifies the quadrature-modulated signal and outputs a relay device output signal,
A directional transmission antenna or a non-directional transmission antenna arranged so as not to have directivity of a relay signal output in the direction of the reception antenna.
【０００９】第３の発明に係わるディジタル通信および
放送中継装置は、前記複素相関器、前記伝送路情報制御
器および前記レプリカ生成器を、多段構成とし、伝送路
推定を行うことにより、複数の廻り込み波をキャンセル
するものである。In a digital communication and broadcast relay apparatus according to a third aspect of the present invention, the complex correlator, the transmission path information controller, and the replica generator have a multi-stage configuration, and perform transmission path estimation to perform a plurality of round trips. This is to cancel the storm wave.
【００１０】第４の発明に係わる無線中継装置は、親局
送信信号の到来方向に指向性を持つ第１の指向性受信ア
ンテナと、自局送信アンテナ方向に指向した第２の指向
性受信アンテナと、前記受信アンテナで受信された受信
信号を増幅する第１のアンプと、前記第１のアンプから
の出力を直交検波して受信直交信号に変換する直交検波
器と、その受信直交信号とあらかじめ記憶しておいた信
号との複素相関を計算する複素相関器と、前記あらかじ
め信号を記憶し、蓄積しておくバッファメモリと、前記
複素相関器出力から推定された伝送路情報を用いて過去
のキャンセラ制御値を更新する伝送路情報制御器と伝送
路情報制御器の出力信号をもとに、減衰器および移相器
で、各ブランチの受信信号中の廻り込み干渉信号の振
幅、位相を合わせ、廻り込み干渉信号を除去し、キャン
セル信号を出力する減算器と、その減算器出力信号を直
交変調する直交変調器と、その直交変調した信号を増幅
して中継装置出力信号を出力する第２のアンプと、前記
受信アンテナ方向に中継信号出力の指向性を持たないよ
うに配した指向性送信アンテナまたは無指向性送信アン
テナと、を有するものである。According to a fourth aspect of the present invention, there is provided a radio relay apparatus comprising: a first directional receiving antenna having directivity in an arrival direction of a master station transmission signal; and a second directional receiving antenna pointing in the direction of the own station transmission antenna. A first amplifier for amplifying a received signal received by the receiving antenna; a quadrature detector for quadrature detecting an output from the first amplifier to convert it into a received quadrature signal; A complex correlator that calculates a complex correlation with the stored signal, a buffer memory that stores and accumulates the signal in advance, and a past correlator using transmission path information estimated from the output of the complex correlator. Based on the transmission path information controller that updates the canceller control value and the output signal of the transmission path information controller, the attenuator and phase shifter adjust the amplitude and phase of the wraparound interference signal in the reception signal of each branch. , A subtractor that removes the interference signal and outputs a cancel signal; a quadrature modulator that quadrature modulates the output signal of the subtracter; and a second that amplifies the quadrature-modulated signal and outputs a repeater output signal. An amplifier and a directional transmission antenna or a non-directional transmission antenna arranged so as not to have directivity of a relay signal output in the direction of the reception antenna.
【００１１】[0011]
【発明の実施の形態】実施の形態１．図１に本実施の形
態１に係る放送波中継装置の構成図を示す。図におい
て、１は親局送信アンテナ、２は指向性受信アンテナ
（２本以上）、３はアンプ、４は直交検波器、５は複素
相関器、６はバッファメモリ、７は伝送路情報制御器、
８はレプリカ生成器、９は減算器、１０は結合器、１１
は直交変調器、１２はアンプ、１３は指向性または無指
向性送信アンテナである。なお、DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 shows a configuration diagram of a broadcast wave relay device according to the first embodiment. In the figure, 1 is a base station transmitting antenna, 2 is a directional receiving antenna (two or more), 3 is an amplifier, 4 is a quadrature detector, 5 is a complex correlator, 6 is a buffer memory, and 7 is a transmission line information controller. ,
8 is a replica generator, 9 is a subtractor, 10 is a combiner, 11
Is a quadrature modulator, 12 is an amplifier, and 13 is a directional or omnidirectional transmitting antenna. In addition,
【００１２】次に、各部について説明する。２つの指向
性受信アンテナ２(2a,2b)は、共に親局送信アンテナ１
の方向に指向性を持つアンテナで、本来は（理想的に
は）親局送信アンテナ１から送信された信号を受信する
ものである。Next, each part will be described. The two directional receiving antennas 2 (2a, 2b) are both the master station transmitting antenna 1
The antenna has a directivity in the direction of (1), and originally (ideally) receives a signal transmitted from the master station transmission antenna 1.
【００１３】しかし、親局送信アンテナ１からの送信信
号の受信と同時に、後述する指向性または無指向性送信
アンテナ１３から出力される放送中継装置出力信号の廻
り込み波が受信信号に混入されることになる。ここで、
廻り込み干渉信号は、指向性または無指向性送信アンテ
ナ１３からの中継装置出力信号が、指向性受信アンテナ
２と指向性または無指向性送信アンテナ１３との指向特
性による結合量だけ減衰された信号である。However, at the same time as the reception of the transmission signal from the master station transmission antenna 1, a wraparound wave of a broadcast relay device output signal output from a directional or omnidirectional transmission antenna 13 described later is mixed into the reception signal. Will be. here,
The wraparound interference signal is a signal obtained by attenuating the output signal of the relay device from the directional or omnidirectional transmission antenna 13 by the amount of coupling due to the directional characteristics of the directional reception antenna 2 and the directional or omnidirectional transmission antenna 13. It is.
【００１４】アンプ３は、指向性受信アンテナ２が受信
した信号を増幅するものである。直交検波器４は、アン
プ３からの出力信号を直交検波し、直交Ｉ、Ｑ信号を出
力するものである。The amplifier 3 amplifies a signal received by the directional receiving antenna 2. The quadrature detector 4 performs quadrature detection on an output signal from the amplifier 3 and outputs quadrature I and Q signals.
【００１５】複素相関器５は、直交検波器４からの直交
Ｉ、Ｑ信号と、バッファメモリ６からの出力信号との複
素相関をとって出力するものである。バッファメモリ６
は、後述する結合器１０の出力信号を記憶し、蓄積して
おくものであり、指向性または無指向性送信アンテナ１
３から出力される中継装置信号の直交変調前の信号、つ
まり廻り込み波干渉信号が除去された信号が記憶され
る。The complex correlator 5 takes the complex correlation between the quadrature I and Q signals from the quadrature detector 4 and the output signal from the buffer memory 6 and outputs the result. Buffer memory 6
Is for storing and accumulating an output signal of a coupler 10 to be described later.
The signal before the quadrature modulation of the relay apparatus signal output from 3, that is, the signal from which the loop interference signal has been removed is stored.
【００１６】直交Ｉ、Ｑ信号は、バッファメモリ６に記
憶された信号が、伝送路減衰を受け、位相回転され、遅
延した信号と、親局送信アンテナ１からの送信信号との
合成信号である。本発明では、ディジタル通信や放送を
行うので、親局送信アンテナ１からの送信信号は自己相
関特性の強い信号を用いる。従って、複素相関器４にお
いて複素相関を計算することで、自身信号とは強い相関
を持ち、他信号とは無相関となるので、相関値が最大値
となる位置にタイミングを合わせることにより、廻り込
み干渉信号の遅延時間、伝送路減衰情報、位相回転情報
が得られる。The quadrature I and Q signals are synthesized signals of a signal stored in the buffer memory 6 that has been subjected to transmission path attenuation, phase rotated and delayed, and a transmission signal from the master station transmission antenna 1. . In the present invention, since digital communication and broadcasting are performed, a signal having a strong autocorrelation characteristic is used as a transmission signal from the master station transmission antenna 1. Therefore, by calculating the complex correlation in the complex correlator 4, the signal has a strong correlation with its own signal and becomes uncorrelated with other signals. The delay time, transmission path attenuation information, and phase rotation information of the embedded interference signal can be obtained.
【００１７】これを簡単に式で説明する。中継装置の指
向性または無指向性送信アンテナ１３から出力される中
継装置信号の直交変調前の信号をｒ（ｔ）とする。This will be described simply by using equations. A signal before quadrature modulation of the relay device signal output from the directional or omnidirectional transmission antenna 13 of the relay device is defined as r (t).
【００１８】このｒ（ｔ）が受信までの間に、大きさＡ
の減衰を受け、θの位相回転を受けるとすると、指向性
受信アンテナ２に入射してくる信号はＡｅｘｐ（ｊθ）
ｒ（ｔ）＋ｒ（ｔ＋τ）と表される。By the time the r (t) is received, the size A
And a phase rotation of θ, the signal incident on the directional receiving antenna 2 is Aexp (jθ)
It is expressed as r (t) + r (t + τ).
【００１９】この信号とバッファメモリ６に記憶してお
いた信号ｒ（ｔ）との複素相関処理を行い、相関値が最
大となる位置を探すことで、廻り込み干渉信号の入射タ
イミングが求められ、その点での相関値は、Ａｅｘｐ
（ｊθ）｜ｒ（ｔ）｜2＋ｒ（ｔ）*ｒ（ｔ＋τ）とな
る。ここで*は複素共役を示す。By performing a complex correlation process between this signal and the signal r (t) stored in the buffer memory 6 and searching for a position where the correlation value becomes maximum, the incident timing of the wraparound interference signal is obtained. , The correlation value at that point is Aexp
(Jθ) | r (t) | 2 + r (t) * r (t + τ). Here, * indicates a complex conjugate.
【００２０】本発明では、親局送信アンテナ１からの送
信信号を自己相関特性の強い信号を用いるので、上式の
第２項のｒ（ｔ）*ｒ（ｔ＋τ）は無相関となり０と考
えて良いこととなる。そして、上式第１項を｜ｒ（ｔ）
｜2で正規化を行えば、伝送路情報Ａｅｘｐ（ｊθ）が
得られる。この情報を伝送路情報制御器７へ出力する。In the present invention, since a signal having a strong autocorrelation characteristic is used as a transmission signal from the master station transmission antenna 1, r (t) * r (t + τ) in the second term of the above equation is uncorrelated and is considered to be 0. It will be good. Then, the first term of the above equation is | r (t)
By normalizing with | 2 , transmission path information Aexp (jθ) can be obtained. This information is output to the transmission path information controller 7.
【００２１】伝送路情報制御器７は、複素相関器４から
の出力信号を用いて伝送路推定情報の制御を行うもので
ある。ここには、過去の伝送路推定情報が記憶されてい
るので、それを用いて、廻り込み干渉信号の入射遅延時
間、伝送路減衰情報、位相回転情報の更新を行い、その
情報をレプリカ生成器８へ出力する。レプリカ生成器８
は、伝送路情報制御器７からの情報を得、それを用い
て、バッファメモリ６に記憶された信号を、遅延させ、
減衰し、位相を変化させ、廻り込み干渉信号のレプリカ
信号を出力するものである。The transmission path information controller 7 controls transmission path estimation information using the output signal from the complex correlator 4. Here, since the past transmission path estimation information is stored, the information is used to update the incident delay time of the wraparound interference signal, transmission path attenuation information, and phase rotation information, and the information is used as a replica generator. 8 is output. Replica generator 8
Obtains information from the transmission path information controller 7 and delays the signal stored in the buffer memory 6 using the information.
It attenuates, changes the phase, and outputs a replica signal of the wraparound interference signal.
【００２２】減算器９は、直交検波器４の出力信号であ
る直交Ｉ、Ｑ信号から、レプリカ生成器８から出力され
るキャンセル信号を減算し、キャンセラ出力信号を出力
するものである。The subtractor 9 subtracts the cancel signal output from the replica generator 8 from the quadrature I and Q signals output from the quadrature detector 4, and outputs a canceller output signal.
【００２３】結合器１０は複数のアンテナにより形成さ
れる、各ブランチの減算器９において出力されたキャン
セル信号のダイバーシチ合成を行う。The combiner 10 performs diversity combining of the cancel signals output from the subtracters 9 of the respective branches formed by a plurality of antennas.
【００２４】直交変調器１１は、結合器１０からの合成
出力信号を直交変調し、直交変調信号を出力するもので
ある。アンプ１２は、直交変調器１１からの直交変調信
号を増幅して出力するものである。指向性または無指向
性送信アンテナ１３は、アンプ１２からの増幅された直
交変調信号を中継増幅信号として出力するものである。The quadrature modulator 11 quadrature modulates the combined output signal from the combiner 10 and outputs a quadrature modulated signal. The amplifier 12 amplifies and outputs a quadrature modulated signal from the quadrature modulator 11. The directional or omnidirectional transmission antenna 13 outputs the amplified quadrature modulated signal from the amplifier 12 as a relay amplification signal.
【００２５】廻り込み干渉信号に複数の遅延波が存在す
るマルチパス環境において,図２に示すように、図１の
複素相関器５、伝送路情報制御器７、およびレプリカ生
成器８を遅延波の数だけ多段構成とすることにより、そ
れぞれの遅延波をキャンセルすることができる。図２は
廻り込み波が３波存在する場合の構成を示している。In a multipath environment in which a plurality of delayed waves exist in the loop interference signal, as shown in FIG. 2, the complex correlator 5, the transmission path information controller 7, and the replica generator 8 shown in FIG. By using the multi-stage configuration as many as the number, the respective delayed waves can be canceled. FIG. 2 shows a configuration in the case where there are three wraparound waves.
【００２６】それぞれの廻り込み波のキャンセラは、そ
れぞれのレプリカ生成器５５の３段で構成され、それぞ
れに直交検波器４とバッファメモリ６から信号が入力さ
れる。それぞれのキャンセラの出力信号は減算器９で直
交検波器４の出力信号から減算され、その後、前記同様
に各ブランチ出力信号が結合器１０で合成され、直交変
調器１１へ出力される。なお、他の動作は図１と同様で
説明を省く。Each of the wraparound wave cancellers is constituted by three stages of each replica generator 55, and signals are input to the quadrature detector 4 and the buffer memory 6, respectively. The output signal of each canceller is subtracted from the output signal of the quadrature detector 4 by the subtractor 9, and then the branch output signals are combined by the combiner 10 and output to the quadrature modulator 11 in the same manner as described above. The other operations are the same as in FIG. 1 and will not be described.
【００２７】次に、図１を用いて放送波中継装置の動作
について説明する。親局送信アンテナ１からの送信信号
受信開始当初は、親局送信アンテナ１からの送信信号が
指向性受信アンテナ２で受信され、アンプ３で増幅され
て、直交検波器４で、直交検波される。Next, the operation of the broadcast wave relay device will be described with reference to FIG. At the beginning of the reception of a transmission signal from the master station transmission antenna 1, the transmission signal from the master station transmission antenna 1 is received by the directional reception antenna 2, amplified by the amplifier 3, and subjected to quadrature detection by the quadrature detector 4. .
【００２８】複素相関器５では、直行検波器４の出力信
号とバッファメモリ６に蓄えられた信号との複素相関を
行い、伝送路情報制御器７へ出力する。伝送路情報制御
器７では、過去の伝送路推定情報を加味して、伝送路推
定値を更新する。その情報が、レプリカ生成器８に出力
され、バッファメモリ６に記憶された信号が、遅延時
間、信号レベル、位相を変動されて廻り込み干渉信号の
レプリカ信号として出力される。The complex correlator 5 performs a complex correlation between the output signal of the orthogonal detector 4 and the signal stored in the buffer memory 6 and outputs the result to the transmission path information controller 7. The transmission path information controller 7 updates the transmission path estimation value in consideration of past transmission path estimation information. The information is output to the replica generator 8, and the signal stored in the buffer memory 6 is output as a replica signal of the wraparound interference signal with the delay time, the signal level, and the phase varied.
【００２９】減算器９では、直交検波器４の出力信号か
らレプリカ生成器８の出力信号を減算し、キャンセラ出
力信号として出力する。但し受信の開始当初は、キャン
セル信号は出力されないので、受信信号がそのままキャ
ンセラ出力信号として出力される。The subtractor 9 subtracts the output signal of the replica generator 8 from the output signal of the quadrature detector 4 and outputs the result as a canceller output signal. However, since the cancel signal is not output at the beginning of the reception, the received signal is output as the canceller output signal as it is.
【００３０】結合器１０では、複数のアンテナによって
形成される、各ブランチの減算器９からの出力信号をダ
イバーシチ合成し、合成信号として出力する。The combiner 10 diversity-combines the output signals from the subtracters 9 of the respective branches, which are formed by a plurality of antennas, and outputs the combined signals.
【００３１】結合器１０の出力信号は、バッファメモリ
６に記憶され、また直交変調器１１で直交変調され直交
変調信号が出力される。直交変調器１１から出力された
信号はアンプ１２で増幅されて指向性または無指向性送
信アンテナ１３から中継装置出力として送出される。The output signal of the combiner 10 is stored in the buffer memory 6 and is quadrature-modulated by the quadrature modulator 11 to output a quadrature modulated signal. The signal output from the quadrature modulator 11 is amplified by the amplifier 12 and transmitted from the directional or omnidirectional transmission antenna 13 as the output of the relay device.
【００３２】そして、指向性または無指向性送信アンテ
ナ１３から中継装置出力信号が出力されると、指向性受
信アンテナ１と指向性または無指向性送信アンテナ１３
との指向特性による結合量だけ減衰された廻り込み干渉
信号が指向性受信アンテナ２から受信され、親局送信ア
ンテナ１からの送信信号との合成信号が受信信号として
アンプ３に出力される。When the relay device output signal is output from the directional or omnidirectional transmission antenna 13, the directional reception antenna 1 and the directional or omnidirectional transmission antenna 13 are output.
A wraparound interference signal attenuated by the amount of coupling due to the directional characteristic of the master station is received from the directional receiving antenna 2, and a combined signal with the transmission signal from the master station transmission antenna 1 is output to the amplifier 3 as a reception signal.
【００３３】以降は、上記のように順次処理されていく
と、伝送路情報制御器７では、その時点時点の伝送路推
定情報が蓄積され、更新されていくことになる。Thereafter, as the processing is sequentially performed as described above, the transmission path information controller 7 accumulates and updates the transmission path estimation information at that time.
【００３４】廻り込み干渉信号にそれぞれ遅延波が存在
するマルチパス環境においては、図２に示すように、多
段構成の各段は同様の操作が行われ、それぞれの出力を
減算器９で直交検波器４の出力信号から減算し、各アン
テナブランチの減算器９の出力は、結合器１０で合成さ
れ、その出力はバッファメモリ６に記憶され、直交変調
器９へ出力され、以下前記同様の操作が行われる。In a multipath environment in which a delayed wave exists in each of the interfering interference signals, the same operation is performed in each stage of the multistage configuration as shown in FIG. The output of the subtractor 9 is subtracted from the output signal of the modulator 4, the outputs of the subtractors 9 of the respective antenna branches are combined by the combiner 10, and the output is stored in the buffer memory 6 and output to the quadrature modulator 9. Is performed.
【００３５】実施の形態２．本実施の形態２による無線
中継装置の構成について説明する。Embodiment 2 The configuration of the wireless relay device according to the second embodiment will be described.
【００３６】図３は本実施の形態２による中継装置の構
成を示す。図において、１は親局送信アンテナ、２は、
親局方向と自局送信アンテナ方向にそれぞれ指向性を持
つ受信アンテナで、３はアンプ、４は直交検波器、５は
複素相関器、６はバッファメモリ、７は伝送路情報制御
器、１０１は減衰器、１０２は移相器、１０３は減算
器、１１は直交変調器、１２はアンプ、１３は指向性ま
たは無指向性送信アンテナである。FIG. 3 shows the configuration of the relay device according to the second embodiment. In the figure, 1 is a base station transmitting antenna and 2 is
Receiving antennas having directivities in the direction of the master station and the transmitting antenna of the own station. Reference numeral 3 denotes an amplifier, 4 denotes a quadrature detector, 5 denotes a complex correlator, 6 denotes a buffer memory, 7 denotes a transmission line information controller, and 101 denotes a transmission line information controller. An attenuator, 102 is a phase shifter, 103 is a subtractor, 11 is a quadrature modulator, 12 is an amplifier, and 13 is a directional or omni-directional transmitting antenna.
【００３７】次に、各部について説明する。指向性受信
アンテナ２は、自局送信アンテナ１３方向に指向性を持
つアンテナ２ａと親局送信アンテナ１方向に指向性を持
つアンテナ２ｂで構成され、本来は（理想的には）受信
アンテナ２ａは自局送信アンテナ１３から送信された信
号を、受信アンテナ２ｂは親局送信アンテナ１から送信
された信号を受信するものである。Next, each part will be described. The directional receiving antenna 2 is composed of an antenna 2a having directivity in the direction of the local station transmitting antenna 13 and an antenna 2b having directivity in the direction of the master station transmitting antenna 1. Originally (ideally), the receiving antenna 2a is The receiving antenna 2b receives the signal transmitted from the master station transmitting antenna 1, and the receiving antenna 2b receives the signal transmitted from the own station transmitting antenna 13.
【００３８】しかし、受信アンテナ２ａには親局送信ア
ンテナ１からの送信信号が、受信アンテナ２ｂには自局
送信アンテナ１３からの廻り込み干渉信号が混入され
る。However, the transmission signal from the master station transmission antenna 1 is mixed in the reception antenna 2a, and the wraparound interference signal from the own station transmission antenna 13 is mixed in the reception antenna 2b.
【００３９】アンプ３、直交検波器４、複素相関器５、
バッファメモリ６、伝送路情報制御器７、直交変調器１
１、アンプ１２は前記実施の形態１の場合と同様の動作
をするので、ここでは省略する。An amplifier 3, a quadrature detector 4, a complex correlator 5,
Buffer memory 6, transmission line information controller 7, quadrature modulator 1
1. Since the amplifier 12 operates in the same manner as in the first embodiment, it is omitted here.
【００４０】受信アンテナ２で受信された信号は、アン
プ３で増幅され、直交検波器４で直交検波され、直交
Ｉ、Ｑ信号を出力する。The signal received by the receiving antenna 2 is amplified by the amplifier 3, subjected to quadrature detection by the quadrature detector 4, and outputs quadrature I and Q signals.
【００４１】直交検波器４の出力信号とあらかじめ記憶
されたバッファメモリ６の出力信号とから、複素相関器
５で相関処理を行い、伝送路情報制御器７において、廻
り込み干渉信号の入射タイミング、振幅、位相情報を推
定する。A correlation process is performed by the complex correlator 5 on the basis of the output signal of the quadrature detector 4 and the output signal of the buffer memory 6 which is stored in advance. Estimate amplitude and phase information.
【００４２】伝送路情報制御器７の出力信号をもとに、
減衰器１０１、および移相器１０２で、二つのブランチ
の受信信号中の廻り込み干渉信号の振幅、位相を合わ
せ、減算器１０３において、受信アンテナ２ｂのブラン
チの移相器１０２の出力信号から、受信アンテナ２ａの
ブランチの移相器１０２の出力信号を減算して、廻り込
み干渉信号を除去し、キャンセル信号を出力する。Based on the output signal of the transmission path information controller 7,
The attenuator 101 and the phase shifter 102 adjust the amplitude and phase of the wraparound interference signal in the received signals of the two branches, and the subtractor 103 calculates the output signal of the phase shifter 102 of the branch of the receiving antenna 2b from the output signal. The output signal of the phase shifter 102 in the branch of the receiving antenna 2a is subtracted to remove the sneak interference signal and output a cancel signal.
【００４３】ここで、受信アンテナ２ａに入射する親局
送信アンテナ１からの送信信号をＳａ、自局廻り込み波
をＩａ、受信アンテナ２ｂに入射する親局送信アンテナ
１からの送信信号をＳｂ、自局廻り込み波をＩｂとお
く。Here, the transmitting signal from the master transmitting antenna 1 incident on the receiving antenna 2a is Sa, the wraparound wave of the own station is Ia, the transmitting signal from the master transmitting antenna 1 incident on the receiving antenna 2b is Sb, Let the wave wrapping around the own station be Ib.
【００４４】受信アンテナ２ａは自局送信アンテナ１３
方向に指向性を持ち、受信アンテナ２ｂは親局送信アン
テナ１方向に指向性を持ったアンテナであるので、上記
Ｓａ、Ｉａ、Ｓｂ、Ｉｂの間にはＳａ＜＜ＳｂまたはＩ
ａ＞＞Ｉｂの関係が成立する。この場合、本発明はＩａ
とＩｂの廻り込み干渉信号成分の振幅と位相を合わせて
合成するので、次のことが言える。The receiving antenna 2a is the local transmitting antenna 13
Since the receiving antenna 2b is directional in the direction and the receiving antenna 2b is directional in the direction of the master station transmitting antenna 1, there is a Sa << Sb or Ib between Sa, Ia, Sb and Ib.
a >> Ib holds. In this case, the present invention provides Ia
And Ib, the amplitude and phase of the sneaking interference signal components are combined and combined, so that the following can be said.
【００４５】Ｓａ＜＜Ｓｂが成立する場合には、Ｉａと
Ｉｂの成分の減算を行う際に、親局送信アンテナ１から
の送信信号成分を小さくしてしまうことがないと近似で
きる。また、Ｉａ＞＞Ｉｂが成立する場合には、Ｉａと
Ｉｂの大きさをそろえると同時にＳａ＜＜Ｓｂが成立
し、この場合も親局送信アンテナ１からの送信信号成分
を小さくしてしまうことがないと近似できる。このよう
な操作により親局送信アンテナ１からの送信信号を良好
に受信する。When Sa << Sb is satisfied, it can be approximated that when the components Ia and Ib are subtracted, the transmission signal component from the master station transmission antenna 1 is not reduced. Further, when Ia >> Ib is satisfied, Sa << Sb is satisfied at the same time when the magnitudes of Ia and Ib are equalized. In this case, too, the transmission signal component from the master station transmission antenna 1 is reduced. Can be approximated without. By such an operation, the transmission signal from the master station transmission antenna 1 is satisfactorily received.
【００４６】減算器１０の出力信号は、バッファメモリ
６に記憶され、また直交変調器１１で直交変調され、ア
ンプ２で増幅され、指向性または無指向性送信アンテナ
１３から中継増幅信号が出力される。The output signal of the subtracter 10 is stored in the buffer memory 6, quadrature-modulated by the quadrature modulator 11, amplified by the amplifier 2, and output as a relay amplified signal from the directional or omni-directional transmission antenna 13. You.
【００４７】以降は、上記操作が繰り返し行われる。な
お、上記実施の形態１および２では放送用の中継装置で
説明したが、通信信号などの各種情報を無線伝送する種
々の中継器にも適用でき、放送波用に限定されるもので
はない。Thereafter, the above operation is repeated. In the first and second embodiments, the description has been given of the relay device for broadcasting. However, the present invention can be applied to various relay devices for wirelessly transmitting various information such as communication signals, and is not limited to a broadcast wave.
【図１】 実施の形態１による無線中継装置の構成図で
ある。FIG. 1 is a configuration diagram of a wireless relay device according to a first embodiment.
【図２】 廻り込み波が３波存在する場合の無線中継装
置の構成図である。FIG. 2 is a configuration diagram of a wireless relay device when there are three looping waves;
【図３】 実施の形態２による無線中継装置の構成図で
ある。FIG. 3 is a configuration diagram of a wireless relay device according to a second embodiment.
【図４】 従来の放送波中継装置の送信アンテナと受信
アンテナとを分離して設置する場合の構成図である。FIG. 4 is a configuration diagram when a transmission antenna and a reception antenna of a conventional broadcast wave relay device are separately installed.
【図５】 従来の放送波中継装置の送信アンテナと受信
アンテナとを分離せずに設置する場合の構成図である。FIG. 5 is a configuration diagram in a case where a transmission antenna and a reception antenna of a conventional broadcast wave relay device are installed without being separated.
１ 親局送信アンテナ ２ 中継局受信アンテナ ２ａ 素子アンテナ１ ２ｂ 素子アンテナ２ ３ アンプ ４ 直交検波器 ５ 複素相関器 ６ バッファメモリ ７ 伝送路情報制御器 ８ レプリカ生成器 ９ 減算器(図１) １０ 結合器 １１ 直交変調器 １２ アンプ １３ 中継局送信アンテナ ５５ レプリカ生成器 １０１ 減衰器 １０２ 移相器 １０３ 減算器(図３) REFERENCE SIGNS LIST 1 master station transmitting antenna 2 relay station receiving antenna 2 a element antenna 1 2 b element antenna 2 3 amplifier 4 quadrature detector 5 complex correlator 6 buffer memory 7 transmission line information controller 8 replica generator 9 subtractor (FIG. 1) 10 coupling Device 11 quadrature modulator 12 amplifier 13 relay station transmitting antenna 55 replica generator 101 attenuator 102 phase shifter 103 subtractor (FIG. 3)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 米澤 ルミ子 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 Ｆターム(参考） 5J021 AA02 AA06 CA06 DB02 DB03 EA04 FA05 FA14 FA15 FA17 FA18 FA26 FA30 FA32 GA01 GA06 HA05 HA06 HA10 5K046 AA05 EE06 EE16 EE37 EE47 EE55 EE57 EF23 HH11 KK00 5K059 AA08 AA12 CC03 DD04 DD07 DD32 DD35 EE02 5K072 AA04 AA22 BB14 BB25 BB27 CC35 DD16 EE33 GG02 GG03 GG12 GG13 GG14 GG37 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Rumiko Yonezawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term in Mitsubishi Electric Corporation (reference) 5J021 AA02 AA06 CA06 DB02 DB03 EA04 FA05 FA14 FA15 FA17 FA18 FA26 FA30 FA32.
Claims (4)
継装置において、２つ以上のブランチを構成する受信ア
ンテナと、 中継装置の送信アンテナから送信した信号が 前記受信アンテナに廻り込み、廻り込み干渉信号を受信
すると共に、それぞれのブランチで廻り込み波をキャン
セルするキャンセラと、 このキャンセラの出力を合成する結合器と、を有するこ
とにより、ダイバーシチ合成受信中継を行うことを特徴
とする無線中継装置。In a wireless relay apparatus used for relaying a transmission signal of a master station, a reception antenna constituting two or more branches, and a signal transmitted from a transmission antenna of the relay apparatus wraps around the reception antenna. A wireless relay device for performing diversity combining reception and relaying by having a canceller that receives an interference signal and cancels a looping wave in each branch, and a coupler that combines the outputs of the cancellers .
継装置において、 親局送信信号の到来方向に指向性を持つ２本以上の指向
性受信アンテナと、 前記受信アンテナで受信された受信信号を増幅する第１
のアンプと、 前記第１のアンプからの出力を直交検波して受信直交信
号に変換する直交検波器と、 その受信直交信号とあらかじめ記憶しておいた信号との
複素相関を計算する複素相関器と、 前記あらかじめ信号を記憶し、蓄積しておくバッファメ
モリと、 前記複素相関器出力から推定された伝送路情報を用いて
過去のキャンセラ制御値を更新する動作を繰り返す伝送
路情報制御器と前記伝送路情報制御器から出力された伝
送路情報とあらかじめ記憶しておいた信号から、廻り込
み干渉信号のレプリカを生成するレプリカ生成器と、前
記受信アンテナで受信された信号から、前記レプリカ生
成器より出力されたキャンセラ信号を減算してキャンセ
ラ出力信号を出力する減算器と、 各アンテナのブランチにおける減算器出力を合成する結
合器と、 その結合器出力信号を直交変調する直交変調器と、 その直交変調した信号を増幅して中継装置出力信号を出
力する第２のアンプと、前記受信アンテナ方向に中継信
号出力の指向性を持たないように配した指向性送信アン
テナまたは無指向性送信アンテナと、を有することを特
徴とする無線中継装置。2. A radio relay apparatus used for relaying a master station transmission signal, comprising: two or more directional receiving antennas having directivity in an arrival direction of a master station transmission signal; and a reception signal received by the reception antenna. Amplify the first
An orthogonal detector that orthogonally detects an output from the first amplifier and converts the output from the first amplifier into a received orthogonal signal; and a complex correlator that calculates a complex correlation between the received orthogonal signal and a signal stored in advance. A buffer memory that stores and stores the signal in advance, a transmission line information controller that repeats an operation of updating a past canceller control value using transmission line information estimated from the complex correlator output, and A replica generator that generates a replica of a wraparound interference signal from transmission line information output from a transmission line information controller and a signal stored in advance, and a replica generator that generates a replica of a wraparound interference signal from a signal received by the reception antenna. Subtractor that subtracts the canceller signal output from the subtractor to output a canceller output signal, and a combiner that combines the subtractor outputs at the branches of each antenna A quadrature modulator for quadrature-modulating the combiner output signal, a second amplifier for amplifying the quadrature-modulated signal and outputting a relay device output signal, and a directivity for a relay signal output in the direction of the receiving antenna. A radio relay apparatus comprising: a directional transmission antenna or an omnidirectional transmission antenna arranged so as not to be disposed.
および前記レプリカ生成器は、多段構成として伝送路推
定を行うことにより、複数の廻り込み波をキャンセルす
ることを特徴とする請求項２に記載の無線中継装置。3. The complex correlator, the transmission path information controller, and the replica generator cancel a plurality of looping waves by performing transmission path estimation as a multi-stage configuration. A wireless relay device according to claim 1.
継装置において、 親局送信信号の到来方向に指向性を持つ第１の指向性受
信アンテナと、 自局送信アンテナ方向に指向した第２の指向性受信アン
テナと、 前記受信アンテナで受信された受信信号を増幅する第１
のアンプと、 前記第１のアンプからの出力を直交検波して受信直交信
号に変換する直交検波器と、 その受信直交信号とあらかじめ記憶しておいた信号との
複素相関を計算する複素相関器と、 前記あらかじめ信号を記憶し、蓄積しておくバッファメ
モリと、 前記複素相関器出力から推定された伝送路情報を用いて
過去のキャンセラ制御値を更新する伝送路情報制御器と
伝送路情報制御器の出力信号をもとに、減衰器および移
相器で、各ブランチの受信信号中の廻り込み干渉信号の
振幅、位相を合わせ、廻り込み干渉信号を除去し、キャ
ンセル信号を出力する減算器と、 その減算器出力信号を直交変調する直交変調器と、 その直交変調した信号を増幅して中継装置出力信号を出
力する第２のアンプと、前記受信アンテナ方向に中継信
号出力の指向性を持たないように配した指向性送信アン
テナまたは無指向性送信アンテナと、を有することを特
徴とする無線中継装置。4. A wireless relay apparatus used for relaying a transmission signal of a master station, comprising: a first directional receiving antenna having directivity in an arrival direction of a transmission signal of the master station; A directional receiving antenna; and a first amplifying a received signal received by the receiving antenna.
An orthogonal detector that orthogonally detects an output from the first amplifier and converts the output from the first amplifier into a received orthogonal signal; and a complex correlator that calculates a complex correlation between the received orthogonal signal and a signal stored in advance. A buffer memory for storing and accumulating the signal in advance; a transmission line information controller and a transmission line information control for updating a past canceller control value using transmission line information estimated from the complex correlator output Subtractor that adjusts the amplitude and phase of the sneak interference signal in the received signal of each branch, removes the sneak interference signal, and outputs a cancel signal based on the output signal of the device. A quadrature modulator for quadrature-modulating the output signal of the subtracter, a second amplifier for amplifying the quadrature-modulated signal and outputting a relay device output signal, and a relay signal output in the direction of the receiving antenna. Wireless relay apparatus characterized by comprising: a directional transmission antennas or omnidirectional transmission antennas arranged to have no tropism, the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11184759A JP2001016152A (en) | 1999-06-30 | 1999-06-30 | Wireless repeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11184759A JP2001016152A (en) | 1999-06-30 | 1999-06-30 | Wireless repeater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001016152A true JP2001016152A (en) | 2001-01-19 |
Family
ID=16158847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11184759A Abandoned JP2001016152A (en) | 1999-06-30 | 1999-06-30 | Wireless repeater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001016152A (en) |
Cited By (38)
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| WO2004098207A2 (en) * | 2003-04-28 | 2004-11-11 | Matsushita Electric Works Ltd. | Radio relay device |
| JP2007519306A (en) * | 2003-11-17 | 2007-07-12 | ケラン インコーポレイテッド | Method and system for antenna interference cancellation |
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| US8023885B2 (en) | 2004-05-13 | 2011-09-20 | Qualcomm Incorporated | Non-frequency translating repeater with downlink detection for uplink and downlink synchronization |
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1999
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