JPH0652881B2 - Wireless repeater - Google Patents
Wireless repeaterInfo
- Publication number
- JPH0652881B2 JPH0652881B2 JP22349686A JP22349686A JPH0652881B2 JP H0652881 B2 JPH0652881 B2 JP H0652881B2 JP 22349686 A JP22349686 A JP 22349686A JP 22349686 A JP22349686 A JP 22349686A JP H0652881 B2 JPH0652881 B2 JP H0652881B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- band
- branch circuit
- frequency
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15564—Relay station antennae loop interference reduction
- H04B7/15578—Relay station antennae loop interference reduction by gain adjustment
Description
【発明の詳細な説明】 (1) 発明の技術分野 本発明は、受信アンテナで受信した無線周波数の信号を
増幅し、該受信信号と同一の無線チャネルで送信信号を
送信アンテナから再送信する無線中継装置に関するもの
であり、特に送受アンテナ間の結合量を抑制するために
送受の信号の周波数を僅かにオフセットさせる無線中継
装置に関するものである。TECHNICAL FIELD OF THE INVENTION The present invention relates to a radio that amplifies a radio frequency signal received by a reception antenna and retransmits a transmission signal from the transmission antenna on the same radio channel as the reception signal. The present invention relates to a relay device, and particularly to a wireless relay device that slightly offsets the frequency of a transmission / reception signal in order to suppress the amount of coupling between transmission / reception antennas.
(2) 従来技術とその問題点 送信信号を受信信号と同一の無線チャネルとする無線中
継方式で、送信信号の周波数を受信信号の周波数から僅
かにオフセットさせ、受信信号に含まれる該オフセット
周波数の信号成分量を検出することにより、送受信アン
テナ間の電波の回り込み量を測定する機能を備えた従来
の無線中継装置は、特願昭61−111088号に示されてい
る。その無線中継装置の基本構成は、図１に示す如く、
受信アンテナ１（利得Ｇ1）、分岐回路２、検出部３、
利得制御用減衰器４、周波数変換器５、信号発生器６、
増幅部７（利得Ｇ7）、制御部８及び送信アンテナ９
（利得Ｇ9）から構成されている。(2) Conventional technology and its problems In a wireless relay system in which the transmission signal is in the same radio channel as the reception signal, the frequency of the transmission signal is slightly offset from the frequency of the reception signal, and the offset frequency of the offset frequency included in the reception signal Japanese Patent Application No. 61-111088 discloses a conventional wireless relay device having a function of measuring the amount of radio waves sneaking between transmitting and receiving antennas by detecting the amount of signal components. The basic configuration of the wireless relay device is as shown in FIG.
Reception antenna 1 (gain G 1 ), branch circuit 2, detection unit 3,
Gain control attenuator 4, frequency converter 5, signal generator 6,
Amplifier 7 (gain G 7 ), controller 8 and transmitting antenna 9
(Gain G 9 ).
受信アンテナ１で受信した受信信号10は増幅部７で増幅
され、送信信号11となるが、周波数変換器５によりオフ
セットが与えられ、そのオフセット量は信号発生器６の
周波数に等しい。従って、受信信号10の周波数を例えば
Ｆ0＝800MHz とし、信号発生器６の周波数を例えばΔｆ
＝110Hzとすると、送信信号11の周波数はＦ0＋Δｆとな
る。なお、中継はシステムで使用している全帯域（例え
ば15MHz）を共通増幅により、一括して中継している。The reception signal 10 received by the reception antenna 1 is amplified by the amplification unit 7 and becomes the transmission signal 11, but an offset is given by the frequency converter 5, and the offset amount is equal to the frequency of the signal generator 6. Therefore, the frequency of the received signal 10 is, for example, F 0 = 800 MHz, and the frequency of the signal generator 6 is, for example, Δf.
= 110 Hz, the frequency of the transmission signal 11 becomes F 0 + Δf. In addition, the relay uses the common amplification for all the bands used in the system (for example, 15 MHz) and relays them all at once.
12は受信アンテナ１における送信信号の回り込み信号で
あり、中継器の受信部に受信信号10と送信信号の回り込
み信号12が入力するか送受信アンテナ間伝搬損失量を１
／Ｌ12としたとき、信号12は信号11に対しレベルが１／
Ｌ12倍となる。従って、Ｇ1×Ｇ7×Ｇ9／Ｌ12は回り込
み信号のループ利得である。ここで、ループ利得が１よ
りも大きい場合（Ｇ＝Ｇ1×Ｇ7×Ｇ9＞Ｌ12）、系は不
安定となり発振を起こし通信システムに悪影響を与え
る。Reference numeral 12 is a sneak signal of the transmission signal in the receiving antenna 1, and the reception signal 10 and the sneak signal 12 of the transmission signal are input to the receiving unit of the repeater or the propagation loss amount between the transmitting and receiving antennas is set to
/ L 12 , the level of the signal 12 is 1 / the level of the signal 11.
L becomes 12 times. Therefore, G 1 × G 7 × G 9 / L 12 is the loop gain of the loop signal. Here, when the loop gain is larger than 1 (G = G 1 × G 7 × G 9 > L 12 ), the system becomes unstable and oscillates, which adversely affects the communication system.
11と12は周波数がΔｆだけオフセットしているため、10
と12の合成波の包絡線にはオフセット周波数Δｆのビー
トが発生する。従って、分岐回路２で受信信号を分岐
し、検出部３で回り込み信号による包絡線のビートを検
出し、その検出レベルから送信信号の回り込み量を測定
する。制御部８では検出部３で得た回り込み量の測定値
を基に、ループ利得が１よりも大きくなる危険性の有無
を判断し、危険性の有る場合には利得制御用減衰器（レ
ベル調整手段）４を調整し回り込み信号のループ利得が
１を越えないように制御を行う。The frequencies of 11 and 12 are offset by Δf, so 10
A beat having an offset frequency Δf is generated in the envelope of the composite wave of (12) and (12). Therefore, the branching circuit 2 branches the received signal, the detecting unit 3 detects the beat of the envelope due to the wraparound signal, and measures the wraparound amount of the transmission signal from the detection level. The control unit 8 determines whether or not there is a risk that the loop gain becomes larger than 1 based on the measured value of the sneak amount obtained by the detection unit 3, and if there is a risk, a gain control attenuator (level adjustment). (Means) 4 is adjusted so that the loop gain of the loop-in signal does not exceed 1.
このように従来技術では、検出部３では受信信号全体を
包絡線検波し、その包絡線のビートを検出し、その検出
レベルから送信信号の回り込み量を測定していた。As described above, in the conventional technique, the detection unit 3 detects the envelope of the entire received signal, detects the beat of the envelope, and measures the wraparound amount of the transmitted signal from the detected level.
しかし、アンテナの周波数特性あるいは周囲の電波反射
物の状況によっては図２(a)に示すように、送受アンテ
ナ間の結合量Ｃ19に不均一な周波数特性が生じ、本来図
２(b)のように例えば一定レベルＬ11の多数の無線チャ
ネルの送信信号11を中継すると、図２(c)のように、回
り込み信号12のレベルＬＬ12にレベル差が生じる。この
場合、送受アンテナ間結合量の大きい無線チャネルに発
振の危険性が有り、結合量の大きいチャネルの結合量を
正しく測定する必要がある。しかし、従来の方法では受
信信号全体を包絡線検波しているため、全帯域の平均的
な結合量は測定できるが、結合量の大きいチャネルの結
合量を正しく測定できない欠点があった。However, depending on the frequency characteristics of the antenna or the conditions of surrounding radio wave reflectors, as shown in FIG. 2 (a), a non-uniform frequency characteristic occurs in the coupling amount C 19 between the transmitting and receiving antennas, which is originally shown in FIG. As described above, for example, when the transmission signals 11 of a large number of wireless channels of the constant level L 11 are relayed, a level difference occurs in the level LL 12 of the loop-in signal 12 as shown in FIG. In this case, there is a risk of oscillation in a radio channel having a large amount of coupling between the transmitting and receiving antennas, and it is necessary to correctly measure the amount of coupling of the channel having a large amount of coupling. However, in the conventional method, since the entire received signal is envelope-detected, the average amount of coupling in the entire band can be measured, but the amount of coupling in a channel having a large amount of coupling cannot be measured correctly.
従って、利得制御用減衰器４の調整も全帯域を均一に行
うことしかできず、回り込みの結合量の大きい帯域では
利得制御用減衰器４の減衰量が不足したり、回り込みの
結合の小さい帯域では利得制御用減衰器４の減衰量が過
剰となってしまう欠点があった。Therefore, the adjustment of the gain control attenuator 4 can only be performed uniformly in the entire band, and the attenuation amount of the gain control attenuator 4 is insufficient in a band having a large wraparound coupling amount or a band having a small wraparound coupling amount. However, there is a drawback that the attenuation amount of the gain control attenuator 4 becomes excessive.
(3) 発明の目的 本発明の目的は、送受アンテナ間の結合量に不均一な周
波数特性がある場合においても、送受アンテナ間の結合
量を精度良く検出でき、さらに、送受アンテナ間の結合
量の周波数特性に応じて最適な利得調整が行える無線中
継装置を提供するこにある。(3) Object of the invention The object of the present invention is to detect the amount of coupling between the transmitting and receiving antennas with high accuracy even when the amount of coupling between the transmitting and receiving antennas has non-uniform frequency characteristics. Another object of the present invention is to provide a wireless relay device that can perform optimum gain adjustment according to the frequency characteristics of.
(4) 発明の構成 (4-1) 発明の特徴と従来技術との差異 本発明の第一の実施例は、回り込み量測定回路で、観測
すべき受信信号周波数帯域を複数の周波数帯域に分割
し、分割した各周波数帯域ごとに、送信アンテナ間結合
量を測定することを主要な特徴とする。(4) Configuration of the invention (4-1) Differences between the features of the invention and the prior art The first embodiment of the present invention is a wraparound amount measurement circuit, in which the received signal frequency band to be observed is divided into a plurality of frequency bands. The main feature is that the amount of coupling between transmitting antennas is measured for each divided frequency band.
本発明の第二の実施例は、回り込み量測定回路で、受信
信号を周波数変換器により中間周波数に変換し、中間周
波数フィルタにより帯域制限し、帯域制限した周波数帯
における送受アンテナ間結合量を測定するが、該周波数
変換器のローカル周波数を掃引することにより、観測す
べき全受信帯域における送受信アンテナ間の電波の回り
込み量を測定することを主要な特徴とする。The second embodiment of the present invention is a wraparound amount measuring circuit, which converts a received signal to an intermediate frequency by a frequency converter, band-limits it by an intermediate frequency filter, and measures the amount of coupling between transmitting and receiving antennas in the band-limited frequency band. However, the main feature is that by sweeping the local frequency of the frequency converter, the amount of radio waves wrapping between the transmitting and receiving antennas in the entire reception band to be observed is measured.
本発明の第一，第二の実施例は、第三の実施例として、
周波数特性可変の利得制御器を具備し、上記回り込み量
測定回路で測定した各受信帯域における送受信アンテナ
間の電波の回り込み量に応じて、その利得制御器を調整
し各受信帯域ごとの中継利得が、系が発振せずに安定な
動作状態で且つ最大利得となるように変形することがで
きる。The first and second embodiments of the present invention are, as a third embodiment,
Equipped with a gain controller with variable frequency characteristics, the gain controller is adjusted according to the amount of sneak of radio waves between the transmitting and receiving antennas in each reception band measured by the sneak amount measurement circuit, and the relay gain for each reception band is adjusted. The system can be deformed so that the system does not oscillate and is in a stable operating state and has the maximum gain.
従来の技術では、送受アンテナ間の結合に周波数特性が
あると、精度良く送受アンテナ間結合量を測定すること
ができない欠点がある。In the conventional technique, if the coupling between the transmitting and receiving antennas has frequency characteristics, there is a drawback that the amount of coupling between the transmitting and receiving antennas cannot be accurately measured.
これに対して本発明では、送受アンテナ間結合量の周波
数特性に応じて、最適な利得制御ができる。On the other hand, in the present invention, optimum gain control can be performed according to the frequency characteristic of the amount of coupling between the transmitting and receiving antennas.
〔実施例１〕 図３は本発明の第一の実施例を説明する図であって、１
から９までは前記と同様であり、13はフィルタ、14は切
替器である。[Embodiment 1] FIG. 3 is a diagram for explaining the first embodiment of the present invention.
9 to 9 are the same as above, 13 is a filter, and 14 is a switch.
フィルタ13は複数の帯域通過フィルタで構成され、分岐
回路２で分岐した受信信号を複数の帯域に分割する。各
帯域フィルタの通過帯域は、送受アンテナ間結合の帯域
内偏差が十分小さいような帯域幅である（例えば数MH
z）。順次切替器14を切替え検出器３で、各帯域での送
受アンテナ間結合量Ｃ19を測定することができる。従っ
て、結合量が最大である帯域での送受アンテナ間結合量
を正確に測定することができ、利得の制御も最も発振の
危険性の高い帯域に合わせて行うことができる。The filter 13 is composed of a plurality of band pass filters, and divides the reception signal branched by the branch circuit 2 into a plurality of bands. The pass band of each band pass filter is such that the in-band deviation of the coupling between the transmitting and receiving antennas is sufficiently small (for example, several MH).
z). The sequential switching device 14 and the switching detector 3 can measure the amount of coupling C 19 between the transmitting and receiving antennas in each band. Therefore, it is possible to accurately measure the amount of coupling between the transmitting and receiving antennas in the band in which the amount of coupling is maximum, and to control the gain in accordance with the band in which the risk of oscillation is highest.
〔実施例２〕 図４は本発明の第二の実施例を説明する図であって、１
から９までは前記と同様であり、15は周波数変換器、16
はＩＦフィルタ、17はローカル信号発生器である。分岐
回路２で分岐した受信信号は周波数変換器15により中間
周波数ＩＦに変換され、ＩＦフィルタ16により送受アン
テナ間結合量の帯域内偏差が十分小さいような帯域幅
（例えば数MHz）に帯域制限され検出器３で送受アンテ
ナ間結合量Ｃ19が測定される。ローカル信号発生器17の
出力は、受信信号の全帯域がＩＦフィルタ16の帯域に変
換されるように、掃引されている。従って、ローカル信
号発生器17の掃引を１回行うと、受信信号の全帯域での
送受アンテナ間結合量が測定できる。第一の実施例と同
様、結合量が最大である帯域での送受アンテナ間結合量
を正確に測定することができ、利得の制御も発振の危険
性が最も高い帯域に合わせて行うことができる。[Second Embodiment] FIG. 4 is a diagram for explaining a second embodiment of the present invention.
9 to 9 are the same as above, 15 is a frequency converter, 16
Is an IF filter, and 17 is a local signal generator. The reception signal branched by the branching circuit 2 is converted into an intermediate frequency IF by the frequency converter 15, and is band-limited by the IF filter 16 to a bandwidth (for example, several MHz) such that the in-band deviation of the amount of coupling between the transmitting and receiving antennas is sufficiently small. The detector 3 measures the coupling amount C 19 between the transmitting and receiving antennas. The output of the local signal generator 17 is swept so that the entire band of the received signal is converted into the band of the IF filter 16. Therefore, if the local signal generator 17 is swept once, the amount of coupling between the transmitting and receiving antennas in the entire band of the received signal can be measured. Similar to the first embodiment, it is possible to accurately measure the amount of coupling between the transmitting and receiving antennas in the band where the amount of coupling is maximum, and to control the gain in accordance with the band in which the risk of oscillation is the highest. .
〔実施例３〕 図５は本発明の第三の実施例を説明する図であって、１
から17までは前記と同様であり、18は利得制御器であ
る。利得制御器18は各帯域毎に利得調整が可能であり、
制御部８の制御により各帯域毎に最適な利得を設定す
る。その効果を図６に示す。送受アンテナ間結合量に周
波数特性があった場合、利得制御器18を制御することに
より、送受アンテナ間結合量の大きい帯域では中継利得
を小さく、送受アンテナ間結合量の小さい帯域では中継
利得を大きく設定する。このように制御することによ
り、回り込み信号のループ利得は全帯域で均一となり、
系の安定領域内で一定のマージンを持って各帯域全てが
最大利得となる最適な調整ができる。[Third Embodiment] FIG. 5 is a diagram for explaining a third embodiment of the present invention.
1 to 17 are the same as above, and 18 is a gain controller. The gain controller 18 can adjust the gain for each band,
An optimum gain is set for each band under the control of the control unit 8. The effect is shown in FIG. When the amount of coupling between the transmitting and receiving antennas has frequency characteristics, by controlling the gain controller 18, the relay gain is small in the band where the amount of coupling between the transmitting and receiving antennas is large, and the relay gain is large in the band where the amount of coupling between the transmitting and receiving antennas is small. Set. By controlling in this way, the loop gain of the sneak signal becomes uniform in all bands,
Optimum adjustment can be performed with a certain margin within the stable region of the system so that each band has the maximum gain.
なお、本実施例では実施例２を用いて説明したが、第１
の実施例において図７に示すように減衰器４を利得制御
器18に置換しても同様に効果が有ることは明らかであ
る。In addition, although the present embodiment has been described using the second embodiment,
It is apparent that the same effect can be obtained by replacing the attenuator 4 with the gain controller 18 as shown in FIG.
図８は利得制御器18の具体例であり、19はフィルタ、20
は減衰器、21はフィルタである。フィルタ19は複数の帯
域フィルタで構成され、入力信号を複数の帯域に分割す
る。各帯域フィルタの通過帯域は、送受アンテナ間結合
量の帯域内偏差が十分小さいような帯域幅であり、回り
込み信号12を測定する帯域フィルタ13の各帯域と対応し
ている。減衰器20は制御部８による制御で、回り込み信
号12を測定する帯域フィルタ13の各帯域と対応してい
る。減衰器20は制御部８による制御で、各帯域の中継利
得が最適となるように減衰量が設定される。フィルタ21
はフィルタ19と同一であり各帯域の信号を合成して出力
とする。従って、利得制御器18は制御部８の制御により
各帯域毎に最適な利得を設定することができる。FIG. 8 shows a specific example of the gain controller 18, 19 is a filter, 20
Is an attenuator and 21 is a filter. The filter 19 is composed of a plurality of band filters and divides the input signal into a plurality of bands. The pass band of each band pass filter has a band width with a sufficiently small in-band deviation of the amount of coupling between the transmitting and receiving antennas, and corresponds to each band of the band pass filter 13 that measures the loop-in signal 12. The attenuator 20 is controlled by the control unit 8 and corresponds to each band of the band filter 13 that measures the loop-in signal 12. The attenuator 20 is controlled by the control unit 8 and the amount of attenuation is set so that the relay gain of each band is optimum. Filter 21
Is the same as the filter 19 and synthesizes the signals of the respective bands to output. Therefore, the gain controller 18 can set the optimum gain for each band under the control of the control unit 8.
(5) 発明の効果 以上詳細に説明したように、本発明により送受アンテナ
間の結合による回り込み量に周波数特性があっても、そ
の最大値または周波数特性に応じた検出が可能であり、
それに基づいて無線中継装置の最適な利得制御をするこ
とができる。(5) Effects of the invention As described in detail above, even if there is a frequency characteristic in the wraparound amount due to the coupling between the transmitting and receiving antennas according to the present invention, it is possible to detect according to the maximum value or the frequency characteristic,
Based on that, optimum gain control of the wireless relay device can be performed.
図１は受信信号と送信信号の無線チャネルを同一とする
無線中継装置の従来技術による構成図、図２(a)(b)(c)
は周波数特性が平坦でない場合の送受アンテナ間結合例
を示す特性図及びレベル変化例図、図３は本発明の第一
の実施例を示すブロック図、図４は本発明の第二の実施
例を示すブロック図、図５及び図７は本発明の第三の実
施例を示すブロック図、図６(a)(b)(c)は本発明の第三
の実施例の効果を示す特性図、図８は本発明に用いる利
得制御器の具体例を示すブロック図である。 １……受信アンテナ、２……分岐回路、 ３……検出器、４……利得制御用減衰器（レベル調整手
段）、５……周波数変換器、６……信号発生器、７……
増幅部、８……制御部、 ９……送信アンテナ、10……受信信号、11……送信信
号、12……回り込み信号、13……フィルタ、14……切替
器、15……周波数変換器、16……ＩＦフィルタ、17……
ローカル信号発生器、 18……利得制御器(レベル調整手段)、 19……フィルタ、20……減衰器、21……フィルタ。FIG. 1 is a configuration diagram of a wireless relay device according to the related art in which a received signal and a transmitted signal have the same wireless channel, and FIGS.
Is a characteristic diagram showing an example of coupling between transmitting and receiving antennas when the frequency characteristic is not flat and a level change example diagram, FIG. 3 is a block diagram showing a first embodiment of the present invention, and FIG. 4 is a second embodiment of the present invention. 5 is a block diagram showing a third embodiment of the present invention, and FIGS. 6 (a), 6 (b) and 6 (c) are characteristic diagrams showing effects of the third embodiment of the present invention. FIG. 8 is a block diagram showing a specific example of the gain controller used in the present invention. 1 ... Receiving antenna, 2 ... Branch circuit, 3 ... Detector, 4 ... Gain control attenuator (level adjusting means), 5 ... Frequency converter, 6 ... Signal generator, 7 ...
Amplifying unit, 8 ... Control unit, 9 ... Transmitting antenna, 10 ... Received signal, 11 ... Transmitted signal, 12 ... Loop signal, 13 ... Filter, 14 ... Switching device, 15 ... Frequency converter , 16 …… IF filter, 17 ……
Local signal generator, 18 ... Gain controller (level adjusting means), 19 ... Filter, 20 ... Attenuator, 21 ... Filter.
Claims (4)
と、該受信アンテナによる受信出力を二分岐する分岐回
路と、該分岐回路の一方の分岐出力側に挿入されたレベ
ル調整手段と、該レベル調整手段の出力に前記無線周波
数信号の無線チャネルに変更を与えない程度の微小な周
波数のオフセットを与えるための周波数変換手段と、該
周波数変換手段の出力を増幅する増幅器と、該増幅器の
出力を中継出力として送出する送信アンテナと、前記分
岐回路の他方の分岐出力に含まれる前記オフセットの周
波数成分を検知する検知手段と、該検知手段の検知出力
により前記レベル調整手段を制御する制御手段とを備え
た無線中継装置において、 前記検知手段が、前記送信アンテナと前記受信アンテナ
との間の結合の帯域内偏差がそれぞれ一定レベル以下で
あり前記分岐回路の他方の出力に接続された共通入力の
複数の帯域通過フィルタと、該複数の帯域通過フィルタ
の各出力の一つを選択するスイッチと、該スイッチの出
力に含まれる前記オフセットの周波数成分を検知するビ
ート検知器とにより構成されていることを特徴とする無
線中継装置。1. A receiving antenna for receiving a radio frequency signal, a branch circuit for bifurcating a received output from the receiving antenna, level adjusting means inserted in one branch output side of the branch circuit, and the level adjusting. A frequency conversion means for giving the output of the means a minute frequency offset that does not change the radio channel of the radio frequency signal, an amplifier for amplifying the output of the frequency conversion means, and a relay of the output of the amplifier A transmission antenna for transmitting as an output, a detection means for detecting the frequency component of the offset contained in the other branch output of the branch circuit, and a control means for controlling the level adjustment means by the detection output of the detection means. In the wireless relay device, the detecting means is configured so that the in-band deviation of the coupling between the transmitting antenna and the receiving antenna is a constant level. A plurality of band-pass filters with common inputs connected to the other output of the branch circuit, a switch for selecting one of the outputs of the plurality of band-pass filters, and the switch included in the output of the switch A wireless relay device comprising: a beat detector that detects a frequency component of an offset.
過フィルタの各帯域と対応した複数の通過帯域を有する
入力共通の第一のフィルタ手段と、該第一のフィルタ手
段の前記複数の通過帯域の各出力をそれぞれ個別にレベ
ル調整する複数の可変減衰器と、該複数の可変減衰器の
各出力にそれぞれ接続されかつ前記第１のフィルタ手段
の各帯域に対応した複数の通過帯域を有する出力共通の
第二のフィルタ手段とにより構成されていることを特徴
とする特許請求の範囲第１項記載の無線中継装置。2. The first level adjusting means has a common input having a plurality of pass bands corresponding to the respective bands of the plurality of band pass filters, and the plurality of pass parts of the first filter means. A plurality of variable attenuators for individually adjusting the level of each output of the band, and a plurality of pass bands respectively connected to the respective outputs of the plurality of variable attenuators and corresponding to the respective bands of the first filter means The wireless relay device according to claim 1, wherein the wireless relay device is configured by a second filter unit having a common output.
と、該受信アンテナによる受信出力を二分岐する分岐回
路と、該分岐回路の一方の出力側に挿入されたレベル調
整手段と、該レベル調整手段の出力に前記無線周波数信
号の無線チャネルに変更を与えない程度の微小な周波数
のオフセットを与えるための周波数変換手段と、該周波
数変換手段の出力を増幅する増幅器と、該増幅器の出力
を中継出力として送出する送信アンテナと、前記分岐回
路の他方の出力に含まれる前記オフセットの周波数成分
を検知する検知手段と、該検知手段の検知出力により前
記レベル調整手段を制御する制御手段とを備えた無線中
継装置において、 前記検知手段が、前記分岐回路の他方の分岐出力を前記
無線周波数信号の全帯域を掃引する局部発振器出力を用
いて中間周波数に変換するための中間周波数変換手段
と、該中間周波数変換手段の出力に含まれる前記オフセ
ットの周波数成分を検知するビート検知器とにより構成
されていることを特徴とする無線中継装置。3. A receiving antenna for receiving a radio frequency signal, a branch circuit for bifurcating a received output from the receiving antenna, a level adjusting means inserted into one output side of the branch circuit, and the level adjusting means. Frequency conversion means for giving a minute frequency offset that does not change the radio channel of the radio frequency signal, an amplifier for amplifying the output of the frequency conversion means, and a relay output of the output of the amplifier. A transmission antenna for transmitting as a radio signal, a detection unit for detecting the frequency component of the offset included in the other output of the branch circuit, and a control unit for controlling the level adjustment unit by the detection output of the detection unit. In the relay device, the detection means uses a local oscillator output for sweeping the other branch output of the branch circuit over the entire band of the radio frequency signal. And a beat detector for detecting a frequency component of the offset included in the output of the intermediate frequency converting means, the wireless relay device.
と前記受信アンテナとの間の結合の帯域偏差がそれぞれ
一定レベル以下であり前記分岐回路の一方の出力に接続
された複数の通過帯域を有する入力共通の第一のフィル
タ手段と、該第一のフィルタ手段の前記複数の通過帯域
の各出力をそれぞれ個別にレベル調整する複数の可変減
衰器と、該複数の可変減衰器の各出力にそれぞれ接続さ
れかつ前記第１のフィルタ手段の各帯域に対応した複数
の通過帯域を有する出力共通の第二のフィルタ手段とに
より構成されていることを特徴とする特許請求の範囲第
３項記載の無線中継装置。4. The level adjusting means has a plurality of pass bands connected to one output of the branch circuit, wherein band deviations of coupling between the transmitting antenna and the receiving antenna are each less than a certain level. First filter means having a common input, a plurality of variable attenuators for individually adjusting the levels of the respective outputs of the plurality of pass bands of the first filter means, and the respective outputs of the plurality of variable attenuators, respectively. 4. The wireless device according to claim 3, further comprising a second filter device connected in common and having a plurality of pass bands corresponding to the respective bands of the first filter device and having a common output. Relay device.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22349686A JPH0652881B2 (en) | 1986-09-24 | 1986-09-24 | Wireless repeater |
| US06/940,134 US4776032A (en) | 1985-05-15 | 1986-12-10 | Repeater for a same frequency with spillover measurement |
| DE3650241T DE3650241T2 (en) | 1985-12-16 | 1986-12-12 | Radio amplifier station with overflow measurement. |
| EP86309705A EP0227393B1 (en) | 1985-12-16 | 1986-12-12 | Radio repeater with spillover measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22349686A JPH0652881B2 (en) | 1986-09-24 | 1986-09-24 | Wireless repeater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6379429A JPS6379429A (en) | 1988-04-09 |
| JPH0652881B2 true JPH0652881B2 (en) | 1994-07-06 |
Family
ID=16799051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22349686A Expired - Fee Related JPH0652881B2 (en) | 1985-05-15 | 1986-09-24 | Wireless repeater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0652881B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2713161B2 (en) * | 1994-04-22 | 1998-02-16 | 日本電気株式会社 | Wireless communication system |
| JP4603462B2 (en) * | 2005-10-26 | 2010-12-22 | 日本無線株式会社 | Relay device |
| JP4758236B2 (en) * | 2006-01-27 | 2011-08-24 | マスプロ電工株式会社 | Digital broadcast retransmitting device wraparound monitoring method, monitoring program, and digital broadcast retransmitting device |
| JP2007201855A (en) * | 2006-01-27 | 2007-08-09 | Maspro Denkoh Corp | Apparatus for retransmitting digital broadcast |
| JP5290207B2 (en) * | 2007-03-02 | 2013-09-18 | クゥアルコム・インコーポレイテッド | Superimposed composite channel filter |
-
1986
- 1986-09-24 JP JP22349686A patent/JPH0652881B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6379429A (en) | 1988-04-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |