JPH02249321A - Relay system - Google Patents
Relay systemInfo
- Publication number
- JPH02249321A JPH02249321A JP7018489A JP7018489A JPH02249321A JP H02249321 A JPH02249321 A JP H02249321A JP 7018489 A JP7018489 A JP 7018489A JP 7018489 A JP7018489 A JP 7018489A JP H02249321 A JPH02249321 A JP H02249321A
- Authority
- JP
- Japan
- Prior art keywords
- wave
- signal
- received
- antenna
- canceller
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 26
- 230000010355 oscillation Effects 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004260 weight control Methods 0.000 description 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は１つの周波数で無線信号を中継する中継方式に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a relay system for relaying wireless signals using one frequency.
（従来の技術）
無線通信システムにおいては、無線信号を直接伝送でき
ないとき、無線中継装置を介して目的地まで伝送するの
が一般的である。(Prior Art) In wireless communication systems, when a wireless signal cannot be directly transmitted, it is common to transmit it to a destination via a wireless relay device.
第２図はこのような中継装置の一例を示すブロック図で
ある。FIG. 2 is a block diagram showing an example of such a relay device.
この図に示す中継装置は、無線信号を受ける受信アンテ
ナ！０１と、この受信アンテナ１０１によって受信され
た無線信号を復調する受信部１０２と、この受信部１０
２からの復調信号のフィルタリング処理及び増幅処理、
周波数変換処理等を行なう信号処理部１０３と、この信
号処理部１０３によって処理された信号を取り込む送信
部１０４と、この送信部！０４によって取り込まれた信
号を無線信号として送信する送信アンテナ＋０５とを備
え、受信用のアンテナ１０１によって受信された無線信
号を増幅し、かつ周波数を変えて送信用のアンテナ＋０
５から送信する。The relay device shown in this figure is a receiving antenna that receives wireless signals! 01, a receiving section 102 that demodulates a radio signal received by this receiving antenna 101, and this receiving section 10.
filtering processing and amplification processing of the demodulated signal from 2;
A signal processing section 103 that performs frequency conversion processing, etc., a transmitting section 104 that takes in the signal processed by this signal processing section 103, and this transmitting section! A transmitting antenna +05 that transmits the signal captured by the receiving antenna 101 as a wireless signal, and a transmitting antenna +0 that amplifies the wireless signal received by the receiving antenna 101 and changes the frequency.
Send from 5.
このとき、従来の中継袋Ｔでは受信周波数と送信周波数
をずらし、更に送信用のアンテナ！０１と、受信用のア
ンテナ＋０５とを独立させて、受信波と、送信波とが干
渉しないようにし、これによって電波干渉による異常発
振を防止して無線信号の中継を行なっている。At this time, in the conventional relay bag T, the receiving frequency and the transmitting frequency are shifted, and the transmitting antenna is also used! 01 and the receiving antenna +05 are made independent to prevent interference between the received wave and the transmitted wave, thereby preventing abnormal oscillation due to radio wave interference and relaying the radio signal.
しかしながらこのような中継装置では、受信波と送信波
の周波数とを異なるものとする必要があるので、周波数
資源の有効活用という点で好ましいものではなかった。However, in such a relay device, it is necessary to set the frequencies of the received wave and the transmitted wave to be different, which is not preferable in terms of effective use of frequency resources.
そこで、受信波の周波数と、送信波の周波数とを同一に
する中継装置として、指向性アンテナを使用する方法や
、記憶装置を使用する方法が一部実用化されている。Therefore, some methods have been put into practical use, such as using a directional antenna or using a storage device as a relay device that makes the frequency of the received wave the same as the frequency of the transmitted wave.
しかしながら、前者においては、受信用のアンテナ１０
１や、送信用のアンテナ＋０５として使用される各指向
性アンテナのアイソレーションをとってアンテナ間の干
渉を防止するのが一般的であるが、このような方法によ
るアンテナ間のアイソレーションには一定の限度がある
ので、送信波の電波出力をある程度以上、大きくするこ
とができず、中継距離をあまり長くすることができない
という問題があった。また、この方法では指向性の鋭い
アンテナ、即ち形状の大きいアンテナを必要とするので
、Ｖ）ＩＰ帯や％ＵＨＦ帯で使用するには、アンテナが
大きくなりすぎて事実上不可能であった。However, in the former case, the receiving antenna 10
It is common to prevent interference between antennas by isolating each directional antenna used as antenna 1 or antenna +05 for transmission, but isolation between antennas with this method requires certain Since there is a limit to this, there is a problem in that the radio wave output of the transmitted wave cannot be increased beyond a certain level, and the relay distance cannot be made very long. Furthermore, since this method requires an antenna with sharp directivity, that is, an antenna with a large shape, the antenna becomes too large to be used in the V) IP band or the UHF band, making it practically impossible.
また、後者においては、受信波を一旦、デジタル符号化
して記憶装置内に格納し、この後所定のタイミングで記
憶装置内に格納されているデジタル信号を読み出して送
信波に変換し、これを送信するので、受信と送信とを交
互に行なわなければならず、連続的に中継動作を行なう
ことができないという問題があった。In the latter case, the received wave is once digitally encoded and stored in a storage device, and then, at a predetermined timing, the digital signal stored in the storage device is read out and converted into a transmission wave, which is then transmitted. Therefore, there is a problem in that reception and transmission must be performed alternately, and relay operations cannot be performed continuously.
（発明の目的）
本発明は上記の事情に鑑みてなされたものであって、１
本のアンテナでしかも同一周波数によって連続的に中継
することができるとともに、アンテナ形状を小さくでき
、これによつｒＶＨＦ帯や、ＵＨＦ帯でも使用すること
ができる中継方式を提供することを目的としている。(Object of the invention) The present invention has been made in view of the above circumstances, and includes:
The purpose of this invention is to provide a relay method that can perform continuous relay using the same frequency using a real antenna, and also allows the antenna shape to be made smaller, thereby allowing it to be used in the rVHF band and UHF band. .
（発明の概要）
上記の目的を達成する為、本発明による中継方式におい
ては以下の如き構成をとる。(Summary of the Invention) In order to achieve the above object, the relay system according to the present invention has the following configuration.
即ち、送信波に基づいて受信波中に混入される送信波成
分と対応するキャンセラー信号を生成し、このキャンセ
ラー信号を用いて前記受信波中に混入されている送信波
成分を除去して送信波を生成することを特徴としている
。That is, based on the transmitted wave, a canceler signal corresponding to the transmitted wave component mixed in the received wave is generated, and this canceller signal is used to remove the transmitted wave component mixed in the received wave, and the transmitted wave is It is characterized by generating.
（発明の実施例）
以下、本発明を図面に示した実施例に基づいて詳細に説
明する。(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
第１図は本発明による中継方式の第１実施例を示すブロ
ック図である。FIG. 1 is a block diagram showing a first embodiment of a relay system according to the present invention.
この図に示す中継装置は水平向オムニアンテナ等の無指
向性アンテナｌと、受信波の経路と送信波の経路とを所
定方向に導く方向性結合器２と。The relay device shown in this figure includes an omnidirectional antenna 1 such as a horizontal omni antenna, and a directional coupler 2 that guides the received wave path and the transmitted wave path in a predetermined direction.
この方向性結合器２から出力される受信波から送信波を
生成して前記方向性結合器２に供給する送信波生成部３
と、この送信波生成部３の異常発振を防止するのに必要
なキャンセラー信号を生成するキャンセラー信号生成部
４とを備えている。A transmission wave generation section 3 generates a transmission wave from the reception wave output from the directional coupler 2 and supplies it to the directional coupler 2.
and a canceller signal generation section 4 that generates a canceller signal necessary to prevent abnormal oscillation of the transmission wave generation section 3.
送信波生成部３は前記方向性結合器２から出力される受
信波信号と前記キャンセラー信号生成部４から出力され
るキャンセラー信号とを加算して曲記受信波信号中に含
まれる送信波成分を除去するキャンセラー回路５と、こ
のキャンセラー回路５の出力を分配する分配器６と２こ
の分配器６から出力される信号を増幅して送信波を生成
する送信機７と、この送信機７の出力を分配する分配器
８とを備えている。The transmission wave generation unit 3 adds the reception wave signal output from the directional coupler 2 and the canceller signal output from the canceller signal generation unit 4 to generate the transmission wave component included in the recorded reception wave signal. A canceller circuit 5 for removing the signal, a distributor 6 for distributing the output of the canceler circuit 5, a transmitter 7 for amplifying the signal output from the distributor 6 to generate a transmission wave, and an output of the transmitter 7. It is equipped with a distributor 8 for distributing.
また、キャンセラー信号生成部４は前記分配器８から出
力される信号を更に分配する分配器９と、この分配器９
から出力される信号と前記分配器６から出力される信号
との相関関係を検知しこの検知結果に基づいて位相・振
幅制御用の制御信号を生成するウェイト制御回路１０と
、このウェイト制御回路１０の出力に基づいて１ｉｉ７
記分配器９から出力される信号の位相及び振幅を調整し
て前記方向性結合器２から出力される受信波信号中の送
信波成分と逆位相、同振幅のキャンセラー信号を生成す
るウェイト回路１１とを備えている。The canceller signal generating section 4 also includes a distributor 9 that further distributes the signal output from the distributor 8, and a distributor 9 that further distributes the signal output from the distributor 8.
a weight control circuit 10 that detects the correlation between the signal output from the distributor 6 and the signal output from the distributor 6 and generates a control signal for phase/amplitude control based on the detection result; 1ii7 based on the output of
a weight circuit 11 that adjusts the phase and amplitude of the signal output from the distributor 9 and generates a canceler signal having the opposite phase and the same amplitude as the transmission wave component in the reception wave signal output from the directional coupler 2; It is equipped with
次に、第１図を参照しながらこの実施例の動作を説明す
る。Next, the operation of this embodiment will be explained with reference to FIG.
まず、無指向性アンテナｌによって送信局からの無線信
号（受信波）が受信されると、方向性結合器２はこの受
信信号をキャンセラー回路５に入力する。First, when a wireless signal (received wave) from a transmitting station is received by the omnidirectional antenna l, the directional coupler 2 inputs this received signal to the canceller circuit 5.
このとき、前記無指向性アンテナｌから送信波が出力さ
れていないので、キャンセラー回路５に入力される受信
波信号には受信波成分のみになっている。また、受信時
の最初においては、キャンセラー信号生成部４はキャン
セラー信号を出力していない。At this time, since no transmission wave is output from the omnidirectional antenna l, the reception wave signal input to the canceller circuit 5 contains only the reception wave component. Further, at the beginning of reception, the canceller signal generation unit 4 does not output a canceller signal.
したがってこのときには、キャンセラー回路５は入力さ
れた受信波信号をそのまま出力し、これが分配器６を介
して送信機７に供給されて、ここで増幅されて送信波と
なり、分配器８、方向性結合器２を介して無指向性アン
テナｌから送信される。Therefore, at this time, the canceller circuit 5 outputs the input received wave signal as it is, and this is supplied to the transmitter 7 via the distributor 6, where it is amplified and becomes a transmitted wave, which is then passed through the distributor 8 and directionally coupled. The signal is transmitted from the omnidirectional antenna l via the receiver 2.
またこのとき、前記送信波は各分配器６，８を介してキ
ャンセラー信号生成部４に入力され、その位相、振幅に
対応するキャンセラー信号、即ち受信波中に回り込む送
信波の位相と逆位相で、かつ同振幅のキャンセラー信号
が生成されて送信波生成部３のキャンセラー回路５に供
給される。At this time, the transmitted wave is input to the canceller signal generation section 4 via each distributor 6, 8, and the canceler signal corresponding to its phase and amplitude, that is, the phase opposite to the phase of the transmitted wave that wraps around into the received wave. , and a canceler signal having the same amplitude is generated and supplied to the canceler circuit 5 of the transmission wave generating section 3.
これによって、前記無指向性アンテナ１から送信される
送信波が受信波中に回り込み、方向性結合器２を介して
送信波生成部３に入力される受信波信号が。As a result, the transmission wave transmitted from the omnidirectional antenna 1 wraps around into the reception wave, and the reception wave signal is input to the transmission wave generation section 3 via the directional coupler 2.
ＰＩ ＝ＲＯ＋ＴＯ・・・・−（１）
但し、ＲＩ 二送信波生成部３に入力される受信波信
号の値。PI=RO+TO...-(1) However, RI is the value of the received wave signal input to the two transmitted wave generation section 3.
ＲＯ：受信信号中の受信波成分値。RO: Received wave component value in received signal.
ＴＯ：受信信号中の送信波成分値。TO: Transmitted wave component value in received signal.
で示される値となっても、このときキャンセラー信号生
成部４から、この受信波信号中の送信波成分を打ち消す
キャンセラー信号、即ち、ＫＮ ＝ＴＯ・・・・・・（
２）
但し、ＴＯ：絶対値が前記受信信号中の送信波成分値と
等しく、かつ逆位相の信
号値。Even if the value shown by is reached, at this time, the canceller signal generation unit 4 generates a canceller signal that cancels the transmitted wave component in this received wave signal, that is, KN = TO... (
2) However, TO: a signal value whose absolute value is equal to the transmitted wave component value in the received signal and whose phase is opposite to that of the transmitted wave component value.
で示される値ＫＮのキャンセラー信号が出力されるので
、キャンセラー回路５から出力される信号は受信波成分
のみとなり、この信号が上述したルートで送信波に変換
され、無指向性アンテナｌから送信される。Since a canceler signal with a value KN expressed by Ru.
これによって、受信波中に送信波成分が混入したときに
発生する異常発振を防止している。This prevents abnormal oscillations that occur when transmitted wave components mix into received waves.
このようにこの実施例においては、受信波中に混入する
送信波成分をキャン上５−回路５によって除去するよう
にしているので、１本の無指向性アンテナ１で送信局か
ら出力される電波信号を連続的に中継することができる
。また、無指向性アンテナ１を使用するので、アンテナ
形状を小さくでき、これによってＶ ｌ−Ｉ Ｆ帯や、
１ＪＨＦ帯においても無線信号を中継することができる
。As described above, in this embodiment, since the transmitting wave component mixed in the received wave is removed by the scanning circuit 5, one omnidirectional antenna 1 is used to remove the radio wave output from the transmitting station. Signals can be relayed continuously. In addition, since the omnidirectional antenna 1 is used, the antenna shape can be made small, which allows for the V l-IF band,
Wireless signals can also be relayed in the 1JHF band.
また上述した実施例においては、受信波を直接増幅して
送信波を生成しているが、受信波中に含まれる情報がデ
ジタル情報であるときには、受信波を一旦検波してベー
スバンドレベルのデジタル信号に変換し、これを波形成
形した後、送信波に変換して送信するようにしても良い
、これによって、中継に起因するビット誤り率を改善す
ることができる。Furthermore, in the above-described embodiment, the received wave is directly amplified to generate the transmitted wave, but when the information contained in the received wave is digital information, the received wave is first detected and the baseband level digital signal is generated. After converting the signal into a signal and shaping the waveform, the signal may be converted into a transmission wave and transmitted. By this, the bit error rate caused by relaying can be improved.
またこのとき、波形成形されたデジタル信号を送信波に
変換する送信機が必要になるが、この送信機の発振回路
として受信波の搬送波に同期して発振する回路や、受信
波中の搬送波を抽出する回路等を用いるようにしても良
い。これによって。Also, at this time, a transmitter that converts the waveform-shaped digital signal into a transmission wave is required, but the oscillation circuit of this transmitter includes a circuit that oscillates in synchronization with the carrier wave of the reception wave, and a circuit that oscillates in synchronization with the carrier wave of the reception wave. It is also possible to use a circuit for extraction. by this.
受信波の搬送波と送信波の搬送波との微妙なずれに起因
するビートの発生を防止、することができる。It is possible to prevent the occurrence of beats caused by a slight difference between the carrier wave of the received wave and the carrier wave of the transmitted wave.
（発明の効果）
以上説明したように本発明によれば、１本のアンテナで
送信局から送信される電波信号を連続的に中継すること
ができるとともに、アンテナ形状を小さくでき、これに
よってＶＨＦ帯や、ＵＨＦ帯でも使用することができる
。(Effects of the Invention) As explained above, according to the present invention, it is possible to continuously relay radio signals transmitted from a transmitting station with a single antenna, and the antenna shape can be made small. It can also be used in the UHF band.
第１図は本発明による中継方式の一実施例を示すブロッ
ク図、第２図は従来から知られている中継装置の一例を
示すブロック図である。
１・・・無指向性アンテナ、２・・・方向性結合器、３
・・・送信波生成部、４・・・キャンセラー信号生成部
。FIG. 1 is a block diagram showing an embodiment of a relay system according to the present invention, and FIG. 2 is a block diagram showing an example of a conventionally known relay device. 1... Omnidirectional antenna, 2... Directional coupler, 3
... Transmission wave generation section, 4... Canceller signal generation section.
Claims (1)
信波に変換して受信局に送信する中継方式において、送
信波に基づいて受信波中に混入される送信波成分と対応
するキャンセラー信号を生成し、このキャンセラー信号
を用いて前記受信波中に混入されている送信波成分を除
去して送信波を生成することを特徴とする中継方式。(1) In a relay method in which radio waves from a transmitting station are used as received waves, and this received wave is converted into a transmitted wave and sent to the receiving station, it corresponds to the transmitted wave component mixed into the received wave based on the transmitted wave. A relay system characterized in that a canceler signal is generated, and a transmit wave component mixed in the received wave is removed using the canceler signal to generate a transmit wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7018489A JPH02249321A (en) | 1989-03-22 | 1989-03-22 | Relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7018489A JPH02249321A (en) | 1989-03-22 | 1989-03-22 | Relay system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02249321A true JPH02249321A (en) | 1990-10-05 |
Family
ID=13424185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7018489A Pending JPH02249321A (en) | 1989-03-22 | 1989-03-22 | Relay system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02249321A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07273703A (en) * | 1994-03-28 | 1995-10-20 | F M Japan:Kk | Broadcast wave repeating howling prevention device for fm broadcast |
| WO1997015991A1 (en) * | 1995-10-26 | 1997-05-01 | Ntt Mobile Communications Network Inc. | Booster |
| WO1999065173A1 (en) * | 1998-06-10 | 1999-12-16 | Nippon Hoso Kyokai | Canceller for jamming wave by interference |
-
1989
- 1989-03-22 JP JP7018489A patent/JPH02249321A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07273703A (en) * | 1994-03-28 | 1995-10-20 | F M Japan:Kk | Broadcast wave repeating howling prevention device for fm broadcast |
| WO1997015991A1 (en) * | 1995-10-26 | 1997-05-01 | Ntt Mobile Communications Network Inc. | Booster |
| US5963847A (en) * | 1995-10-26 | 1999-10-05 | Ntt Mobile Communications Network Inc. | Booster system |
| KR100283612B1 (en) * | 1995-10-26 | 2001-03-02 | 다치카와 게이지 | Booster device |
| WO1999065173A1 (en) * | 1998-06-10 | 1999-12-16 | Nippon Hoso Kyokai | Canceller for jamming wave by interference |
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