JPH09238090A - Ancillary radio system - Google Patents
Ancillary radio systemInfo
- Publication number
- JPH09238090A JPH09238090A JP8042824A JP4282496A JPH09238090A JP H09238090 A JPH09238090 A JP H09238090A JP 8042824 A JP8042824 A JP 8042824A JP 4282496 A JP4282496 A JP 4282496A JP H09238090 A JPH09238090 A JP H09238090A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- band
- reception
- small
- capacity
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、或る割り当てられ
た無線通信の周波数帯を半分づつ低群と高群に分けて其
の各群を大容量のシステムＡの送信と受信とに使用する
場合に，其の低群と高群との間に設けられる僅少な周波
数帯のガードバンドを，別の小容量のシステムＢの送信
と受信とに使用するもの（図５の a イメージ図),即ち
何らかの結合器Ｍを介し大容量のシステムＡと其れと僅
少な周波数間隔にある小容量のシステムＢとを結合する
（図５の b 概略の構成図）併設無線システムに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention divides a certain allocated frequency band of radio communication into a low group and a high group, and uses each group for transmission and reception of a large capacity system A. In this case, a guard band of a small frequency band provided between the low group and the high group is used for transmission and reception of another small capacity system B (a image diagram of FIG. 5), that is, The present invention relates to a combined wireless system in which a large-capacity system A and a small-capacity system B having a small frequency interval are connected to each other via some coupler M (b schematic configuration diagram of FIG. 5).
【０００２】[0002]
【従来の技術】従来は、或る割り当てられた無線周波数
帯に、大容量のシステムＡと小容量のシステムＢとを併
設する時に，両システムの送信周波数と受信周波数との
間の周波数差が少ない場合は、その送信から受信への干
渉が問題となるので，一つのアンテナ・フィーダ系を二
つのシステムＡ，Ｂに共通に使用することをせず、図６
に示す様に、それぞれのシステムに別々のアンテナ・フ
ィーダを設ける構成法が採用されていた。図６の様にア
ンテナ・フィーダ系が別々の場合は、システムＡの送信
からシステムＢの受信への干渉，システムＢの送信から
システムＡの受信への干渉という両システムの間の干渉
が少くて、即ちアンテナＡ，Ｂの間の結合量が例えば−
９０ｄＢ以上であるので問題は無い。ところが、図５の
(b)に示す様なアンテナ・フィーダ系が同一である併設
無線システムの場合は、図６の下部に示す様に、両シス
テムＡ，Ｂ間の干渉を表す結合量を測定する為に用意し
たモニタＭによる結合量は、例えば−３０ｄＢ前後とい
う、前記図６の場合の別々のアンテナ間の結合量の例え
ば−９０ｄＢ以上の値に比して著しく大きな値であるの
で問題が有った。2. Description of the Related Art Conventionally, when a large-capacity system A and a small-capacity system B are installed side by side in a certain assigned radio frequency band, the frequency difference between the transmission frequency and the reception frequency of both systems is If the number is small, the interference from the transmission to the reception becomes a problem, so that one antenna feeder system is not commonly used for the two systems A and B.
As shown in, a configuration method in which a separate antenna feeder is provided for each system has been adopted. When the antenna / feeder system is separate as shown in FIG. 6, the interference between the two systems, that is, the interference from the transmission of the system A to the reception of the system B and the interference from the transmission of the system B to the reception of the system A is small. That is, the coupling amount between the antennas A and B is, for example, −
Since it is 90 dB or more, there is no problem. However, in FIG.
In the case of an attached wireless system with the same antenna / feeder system as shown in (b), it was prepared to measure the amount of coupling that represents the interference between both systems A and B, as shown in the lower part of FIG. The amount of coupling by the monitor M is, for example, about -30 dB, which is a remarkably large value as compared with the value of -90 dB or more of the amount of coupling between the separate antennas in the case of FIG.
【０００３】[0003]
【発明が解決しようとする課題】上記の従来の併設無線
システムの外形的問題は、 ａ．アンテナ・フィーダ系をシステムＡ，Ｂ別に具える
図６の様な構成は、其の建設費用が約２倍必要となる。 ｂ．また、其れらＡ，Ｂ二つのアンテナ・フィーダ系を
を搭載する鉄塔も其の鉄塔の強度が約２倍必要となるの
で、既設の鉄塔では搭載出来ない場合がある。 ｃ．従って、本発明の解決しようとする課題は、建設費
用が少なく，且つ新たに鉄塔条件を考慮しなくても済む
ような併設無線システムの構成法を提供することにあ
る。 また、従来の併設無線システムのシステム上の問題
は、 ａ．送受信干渉であり、図６の下部に示す様に、システ
ムＡ，Ｂの送信周波数と受信周波数の間隔が少なくて近
い場合には、(1) 送信機Ａの出力信号が共通のフィーダ
系を経由して受信機Ｂの入力信号に影響する。(2) 同様
に、送信機Ｂの出力信号が受信機Ａの入力信号に影響す
る。 ｂ．また、新たに追加システムを増設する場合の現用シ
ステムへの影響であり、(1) 結合器の通過損失の増加に
よる各システムのシステムゲイン（送信出力−標準受信
レベル−送受の分波器損失）が低下する。SUMMARY OF THE INVENTION The above-mentioned conventional external problems of the wireless system are as follows. The configuration shown in FIG. 6 in which the antenna / feeder system is provided for each of the systems A and B requires about twice the construction cost. b. Further, the steel towers equipped with the two antenna feeder systems A and B need to have about twice the strength of the steel towers, so that the existing steel towers may not be installed. c. Therefore, the problem to be solved by the present invention is to provide a method of constructing an attached wireless system that requires less construction cost and does not need to newly consider the tower conditions. In addition, the system problems of the conventional side-by-side wireless system include: a. This is a transmission / reception interference, and as shown in the lower part of FIG. 6, when the interval between the transmission frequency and the reception frequency of the systems A and B is small and close, (1) the output signal of the transmitter A passes through the common feeder system. And affects the input signal of the receiver B. (2) Similarly, the output signal of the transmitter B affects the input signal of the receiver A. b. In addition, this is the effect on the existing system when a new additional system is added. (1) System gain of each system due to an increase in coupler passage loss (transmission output-standard reception level-transmission / reception duplexer loss). Is reduced.
【０００４】(2) 追加システムから既設システムへの干
渉（ａ項の送受信干渉）が有る。更に具体的に上記の
送受信干渉について述べる。図７の(a)は、マイクロ波
の５GHz 帯の中央部の周波数配置を示すもので、周波数
帯域が 4640 MHz から4760MHzまでの広い帯域であり、
其の低群4640,4660,4680 MHzを、例えば送信用に、高群
4720,4740,4790 MHzを受信用に使用する大容量のシステ
ムＡと、其の低群と高群の間の狭いガードバンド4680〜
4720 MHzの狭帯域の下部帯域25 MHzの中心周波数4695 M
Hzを送信用に、上部帯域25 MHzの中心周波数4705 MHzを
受信用に使用する小容量システムＢとがあり、図７の
(b)構成図に示す様に、システムＡとシステムＢが結合
器Ｍで結合されて１つのアンテナを共用し併設される。
図７の(a)周波数配置図に示す様に、システムＡとシス
テムＢとの間の周波数間隔が少ないので、互に他システ
ムの送信機の出力が自システムの受信機の入力に影響し
て干渉する。(2) There is interference from the additional system to the existing system (transmission / reception interference in item a). More specifically, the transmission / reception interference will be described. Fig.7 (a) shows the frequency arrangement of the central part of the microwave 5GHz band, and the frequency band is wide band from 4640MHz to 4760MHz.
The low group 4640,4660,4680 MHz, for example, for transmission, the high group
High capacity system A using 4720, 4740, 4790 MHz for reception and narrow guard band between the low and high groups 4680 ~
4720 MHz narrow band lower band 25 MHz center frequency 4695 M
There is a small-capacity system B that uses Hz for transmission and a center frequency of 4705 MHz with an upper band of 25 MHz for reception.
(b) As shown in the configuration diagram, the system A and the system B are combined by the combiner M to share one antenna and are installed side by side.
As shown in (a) frequency allocation diagram of FIG. 7, since the frequency interval between the system A and the system B is small, the output of the transmitter of the other system affects the input of the receiver of the own system. have a finger in the pie.
【０００５】具体的には、中心周波数4680MHz の送信機
Ａの出力（送信スペクトル±10MHz)が, 中心周波数4705
MHzで周波数選択帯域幅±５MHz の受信機Ｂの入力に干
渉し、中心周波数4695 MHzの送信機Ｂの出力（±５MHz)
が, 中心周波数4720 MHzで選択帯域幅±10MHz の受信機
Ａの入力に干渉する。図８はシステムＡの送信スペクト
ル、図９はシステムＢの送信スペクトル、図10はシステ
ムＡの受信機の周波数選択特性、図11はシステムＢの受
信機の周波数選択特性であり、図12, 図13に干渉する送
信スペクトルと受信機の周波数選択特性との関係を示
す。図12はシステムＢの送信スペクトルとシステムＡの
受信周波数選択特性との関係を示し、図13はシステムＡ
の送信スペクトルとシステムＢの受信選択特性との関係
を示す。Specifically, the output of the transmitter A having a center frequency of 4680 MHz (transmission spectrum ± 10 MHz) is the center frequency of 4705 MHz.
Output of transmitter B with center frequency 4695 MHz (± 5 MHz) that interferes with input of receiver B with frequency selection bandwidth ± 5 MHz in MHz
Interferes with the input of receiver A with a center frequency of 4720 MHz and a selected bandwidth of ± 10 MHz. 8 is a transmission spectrum of the system A, FIG. 9 is a transmission spectrum of the system B, FIG. 10 is a frequency selection characteristic of the receiver of the system A, and FIG. 11 is a frequency selection characteristic of the receiver of the system B. Figure 13 shows the relationship between the interference spectrum and the frequency selection characteristics of the receiver. FIG. 12 shows the relationship between the transmission spectrum of system B and the reception frequency selection characteristic of system A, and FIG.
7 shows the relationship between the transmission spectrum of the signal and the reception selection characteristic of the system B.
【０００６】[0006]
【課題を解決するための手段】上記の従来技術による併
設無線システムにおける送受干渉を軽減するという課題
を解決するため手段である本発明の基本的な構成（請求
項１）は、図12の小容量システムＢの送信スペクトルと
大容量システムＡの受信選択特性の関係より、小容量シ
ステムＢから大容量システムＡへの干渉は、システムＢ
の送信出力の主スペクトルが影響しているので、其の影
響を除くために、図１の原理的な構成図に示す如く、シ
ステムＡの受信機Ａの入力部に、システムＢの送信機Ｂ
の出力の主スペクトル分を除去する受信用の帯域除去フ
ィルタＲＢＲ（ Band RejectionFilter) を挿入する様
に構成する。また、図13の大容量システムＡの送信スペ
クトルと小容量システムＢの受信選択特性の関係より、
システムＡからシステムＢへの干渉は、システムＡの送
信機Ａの出力の片側スペクトルが影響しているので其の
影響を除く為に、システムＡの送信機Ａの出力部に、シ
ステムＢの受信機Ｂの受信相当スペクトルを除去する送
信用の帯域除去フィルタＴＢＲを挿入する様に構成す
る。The basic configuration (claim 1) of the present invention, which is a means for solving the problem of reducing the transmission / reception interference in the above-mentioned combined wireless system according to the prior art, is the same as that of FIG. From the relationship between the transmission spectrum of the capacity system B and the reception selection characteristic of the capacity system A, the interference from the capacity system B to the capacity system A is
Since the main spectrum of the transmission output of the system A is affected, in order to remove the influence, as shown in the principle configuration diagram of FIG. 1, the input portion of the receiver A of the system A is connected to the transmitter B of the system B.
A band-rejection filter RBR (Band Rejection Filter) for removing the main spectrum component of the output of is added. Further, from the relationship between the transmission spectrum of the large capacity system A and the reception selection characteristic of the small capacity system B in FIG.
The interference from the system A to the system B is affected by the one-sided spectrum of the output of the transmitter A of the system A. Therefore, in order to remove the influence, the output of the transmitter A of the system A receives the signal of the system B. A band elimination filter TBR for transmission for eliminating the reception equivalent spectrum of the machine B is inserted.
【０００７】上記の従来の併設無線システムにおいて新
たに追加システムを増設する場合の現用システムへの影
響を軽減するという課題を解決するため手段である本発
明の請求項２の構成は、其の通過損失により各システム
のシステムゲインの低下を斉らす結合器として、通常は
入力端A →出力端B,入力端C →出力端B が共に３ｄＢ損
失の二入力合成用ハイブリッドを使用するが、本発明で
は入力端A →出力端B,の損失が少なくて、入力端C →出
力端B は任意の結合量（損失）が得られる方向性結合器
ＤＣを使用する様に構成する。The configuration of claim 2 of the present invention, which is a means for solving the problem of reducing the influence on the active system when a new additional system is newly added in the above-mentioned conventional side-by-side wireless system, has the structure thereof. As a coupler that evenly reduces the system gain of each system due to loss, a hybrid for two-input synthesis, in which the input end A → output end B and the input end C → output end B are both 3 dB loss, is used. In the invention, the loss of the input terminal A → the output terminal B is small, and the input terminal C → the output terminal B is configured to use the directional coupler DC that can obtain an arbitrary coupling amount (loss).
【０００８】そして、其の方向性結合器ＤＣの入力端C
→出力端B の結合量を、システムＡとシステムＢの各シ
ステムゲインの差の半分の結合量とすること（請求項
３）により、システムＡ，Ｂの出力レベルを等しくする
従来のスパン等化用の減衰器を不要とすることが出来
る。The input terminal C of the directional coupler DC
→ The conventional span equalization that equalizes the output levels of the systems A and B by making the coupling amount of the output terminal B half the difference between the system gains of the system A and the system B (Claim 3). It is possible to eliminate the need for an attenuator.
【０００９】また、前記請求項１の図１の大容量システ
ムＡ側で干渉の削減を行う構成で、システムＡの後から
システムＢを設置する場合に、既設のシステムＡに対す
る影響が少ない様にすることを目的とした請求項４の構
成は、図３に示す如く、結合器ＭのシステムＡ側の送信
受信に共通な箇所に、二つのサーキュレータZ1, Z2で挟
まれて干渉波を除去し送信波及び受信波を別々に通過さ
せる二つの帯域除去フィルタBRF1, BRF2 (Band Rejecti
on Filter)から成る送受共用フィルタＣＦを挿入する様
に構成する。In addition, in the structure in which the interference is reduced on the side of the large capacity system A in FIG. 1 of claim 1, when the system B is installed after the system A, the existing system A is less affected. As shown in FIG. 3, the structure of claim 4 for the purpose of carrying out is that an interference wave is sandwiched between two circulators Z 1 and Z 2 at a place common to transmission and reception on the system A side of the coupler M. Two band rejection filters BRF 1, BRF 2 (Band Rejecti
On / off filter) is configured to be inserted into the transmission / reception common filter CF.
【００１０】また、前記請求項３の図２のスパン等化の
減衰器を不要とする構成にて、通過損失を最小とするこ
とを目的とした請求項５の構成は、図４に示す如く、シ
ステムＡとシステムＢの送信用分波器および受信用分波
器を一旦まとめた後、夫々を同一のアンテナANT に結合
する様に構成する。Further, the structure of claim 5 which aims to minimize the passage loss in the structure which does not require the span equalizer attenuator of FIG. 2 of claim 3 has the structure shown in FIG. , The transmission demultiplexer and the reception demultiplexer of the system A and the system B are once put together, and are then connected to the same antenna ANT.
【００１１】[0011]
【発明の実施の形態】図１の本発明の併設無線システム
の原理的な構成図はそのまま、本発明の請求項１に対応
する実施例の構成図でもあり、例えば４GHz, 5 GHz, 6G
Hz帯等の大容量システムＡと、其の送信（受信）用の低
群と受信（送信）用の高群との間の僅少な帯域のガード
バンドの下部バンドを受信用とし上部バンドを送信用と
する小容量システムＢとを併設し同一アンテナANT に結
合させた場合の構成図である。大容量システムＡと小容
量システムＢとの結合に、方向性結合器（請求項２）等
の結合器「Ｍ」を使用した場合に、小容量システムＢか
ら大容量システムＡへの干渉の対策として、大容量シス
テムＡの送信機ＴＸの出力部にＴＢＲを挿入し、其の受
信機ＲＸの入力部にＲＢＲを挿入するように、送信機Ｔ
Ｘと受信機ＲＸとに個別に各干渉波を除去する帯域除去
フィルタＴＢＲ，ＲＢＲ（Band RejectionFilter)を挿
入している。BEST MODE FOR CARRYING OUT THE INVENTION The principle configuration diagram of the combined wireless system of the present invention in FIG. 1 is also the configuration diagram of the embodiment corresponding to claim 1 of the present invention, for example, 4 GHz, 5 GHz, 6G
A high-capacity system A such as Hz band, and a lower band of a guard band of a small band between the low group for transmission (reception) and the high group for reception (transmission) are used for reception and the upper band is transmitted. It is a block diagram at the time of adjoining with the small-capacity system B which is trusted, and combining with the same antenna ANT. Measures for interference from the small capacity system B to the large capacity system A when the coupler "M" such as a directional coupler (claim 2) is used for coupling the large capacity system A and the small capacity system B As for the transmitter T of the large capacity system A, the transmitter T is inserted into the output of the transmitter TX, and the RBR is inserted into the input of the receiver RX.
Band rejection filters TBR and RBR (Band Rejection Filter) for individually removing each interference wave are inserted in the X and the receiver RX, respectively.
【００１２】そして大容量システムＡと小容量システム
Ｂとを結合する結合器「Ｍ」の小容量システムＢとの結
合量を、大容量システムＡのシステムゲイン（＝送信出
力−着信レベルー分波器損失）と小容量システムＢのシ
ステムゲインとの差の半分に選定すること（請求項３）
により、図２のシステムＢの送信機ＴＸの出力部又は受
信機ＲＸの入力部の点線表示の従来使用のスパン等化用
ＡＴＴを使用しないで済ますことが出来る。例えば、シ
ステムＡとシステムＢの各送信出力，着信レベル，分波
器損失を下記の如く仮定すると、システムＡのシステム
ゲイン( 56 dB,62 dB,68 dB)と小容量システムＢのシス
テムゲイン (74 dB)との差は、下記の如く18 dB, 12 d
B, 6 dBとなるので、結合量（最大）が各々の半分の 9
dB,６dB,３dBに選定することにより、前記の点線表示の
従来のスパン等化用ＡＴＴを使用しないで済ますことが
出来ることになる。Then, the coupling amount of the coupler "M" for coupling the large capacity system A and the small capacity system B with the small capacity system B is determined by the system gain of the large capacity system A (= transmission output-reception level-branching filter). Loss) and the system gain of the small capacity system B is selected to be half (claim 3).
Thus, it is possible to avoid the use of the span equalization ATT which is conventionally used and which is indicated by a dotted line at the output of the transmitter TX or the input of the receiver RX of the system B in FIG. For example, assuming the respective transmission output, incoming level, and duplexer loss of system A and system B as follows, the system gain of system A (56 dB, 62 dB, 68 dB) and the system gain of small capacity system B ( 74 dB) is 18 dB, 12 d
B, 6 dB, so the coupling amount (maximum) is 9
By selecting dB, 6 dB, or 3 dB, it is possible to avoid using the conventional span equalization ATT indicated by the dotted line.
【００１３】 送信出力，着信レベル，分波器損失，システム 結合量 ゲイン，差，（最大） 大容量 19 dBm, −43 dBm, ６ dB, 56 dB, 18 dB, 9 dB システムＡ, 25 −43 ６ 62 12 6 （４GHz, 5 GHz） 31 −43 ６ 68 6 3 小容量 システムＢ, 28 dBm, −57 dBm, 11 dB, 74 dB, 図３は本発明の請求項４に対応する実施例の構成図であ
り、図１の請求項１と同様の大容量システムＡに其のガ
ードバンドの小容量システムＢを結合器「Ｍ」で結合し
た場合であり、該結合器Ｍの大容量システムＡ側の送信
受信に共通な箇所に、二つのサーキュレータZ1, Z2で挟
まれて各干渉波を除去し送信波及び受信波を別々に通過
させる二つの帯域除去フィルタBRF1, BRF2から成る送受
共用フィルタＣＦを外付きで挿入する様に構成してい
る。この送受共用フィルタＣＦを外付けで用いる構成で
は、最初にシステムＡを設置した後にシステムＢを設置
する場合に、既設のシステムＡに対するシステムＢの設
置の影響が少ない様にすることが出来て、追加システム
の増設時等に便利である。Transmission output, incoming level, demultiplexer loss, system coupling gain, difference, (maximum) large capacity 19 dBm, −43 dBm, 6 dB, 56 dB, 18 dB, 9 dB system A, 25 −43 6 62 12 6 (4 GHz, 5 GHz) 31 −43 6 68 6 3 Small capacity system B, 28 dBm, −57 dBm, 11 dB, 74 dB, FIG. 3 shows an embodiment corresponding to claim 4 of the present invention. It is a block diagram, when the small capacity system B of the guard band is connected to the large capacity system A similar to claim 1 of FIG. 1 by the combiner "M", and the large capacity system A of the combiner M is shown. It consists of two band elimination filters BRF 1 and BRF 2 that are sandwiched between two circulators Z 1 and Z 2 to eliminate each interference wave and pass the transmission wave and the reception wave separately at the common side for transmission and reception on the side The transmission / reception common filter CF is configured to be externally inserted. In the configuration in which the transmission / reception common filter CF is externally used, when the system B is first installed after the system A is installed, the influence of the installation of the system B on the existing system A can be reduced. This is convenient when adding an additional system.
【００１４】図４は本発明の請求項５に対応する実施例
の構成図であり、前記請求項３の図２のスパン等化の減
衰器を不要とする構成にて、方向性結合器をサーキュレ
ータZ に変更して通過損失を最小とする事を目的とした
構成であり、大容量システムＡと小容量システムＢの送
信用分波器同志および受信用分波器同志を一旦夫々の干
渉波を除去するフィルタＴＢＲ，ＲＢＲを大容量システ
ムＡ側に挿入して互を纏めて結合した後、一つのアンテ
ナ系に結合し併設する様にしたものである。FIG. 4 is a block diagram of an embodiment corresponding to claim 5 of the present invention, in which a directional coupler is used in a configuration in which the span equalizer attenuator of FIG. 2 of claim 3 is unnecessary. The configuration is aimed at minimizing the passage loss by changing to the circulator Z, and the transmission duplexer and the reception duplexer of the large-capacity system A and the small-capacity system B are temporarily interfered with each other. The filters TBR and RBR for eliminating the above are inserted on the side of the large capacity system A and coupled together, and then coupled to one antenna system to be installed side by side.
【００１５】[0015]
【発明の効果】以上説明した如く、本発明によれば、大
容量システムＡから小容量システムＢへの干渉波および
小容量システムＢから大容量システムＡへの干渉波の除
去が簡単に行なえるので、伝送特性の良好な併設無線シ
ステムを低コストで実現出来る効果が得られる。As described above, according to the present invention, the interference wave from the large capacity system A to the small capacity system B and the interference wave from the small capacity system B to the large capacity system A can be easily removed. Therefore, it is possible to obtain the effect of realizing an attached wireless system with good transmission characteristics at low cost.
【図１】 本発明の併設無線システムの原理的な構成図
（請求項１および２に対応するもの）FIG. 1 is a block diagram showing the principle of an attached wireless system of the present invention (corresponding to claims 1 and 2).
【図２】 本発明の請求項３に対応する実施例の構成図FIG. 2 is a configuration diagram of an embodiment corresponding to claim 3 of the present invention.
【図３】 本発明の請求項４に対応する実施例の構成図FIG. 3 is a configuration diagram of an embodiment corresponding to claim 4 of the present invention.
【図４】 本発明の請求項５に対応する実施例の構成図FIG. 4 is a configuration diagram of an embodiment corresponding to claim 5 of the present invention.
【図５】 併設無線システムの説明図[Fig. 5] Illustration of an attached wireless system
【図６】 従来の併設無線システムの構成と送受干渉の
メカニズムの図FIG. 6 is a diagram of a configuration of a conventional side-by-side wireless system and a transmission / reception interference mechanism.
【図７】 従来技術による併設無線システムの構成例の
図FIG. 7 is a diagram of a configuration example of an attached wireless system according to a conventional technique.
【図８】 本発明の動作を説明するためのシステムＡの
送信スペクトル図FIG. 8 is a transmission spectrum diagram of system A for explaining the operation of the present invention.
【図９】 システムＢの送信スペクトル図FIG. 9 is a transmission spectrum diagram of system B.
【図１０】 システムＡの受信周波数選択特性の図FIG. 10 is a diagram of reception frequency selection characteristics of system A.
【図１１】 システムＢの受信周波数選択特性の図FIG. 11 is a diagram of reception frequency selection characteristics of system B.
【図１２】 システムＢの送信スペクトルとシステムＡ
の受信周波数選択特性との関係図FIG. 12: Transmission spectrum of system B and system A
Relationship diagram with reception frequency selection characteristics
【図１３】 システムＡの送信スペクトルとシステムＢ
の受信周波数選択特性との関係図FIG. 13: Transmission spectrum of system A and system B
Relationship diagram with reception frequency selection characteristics
Ａは大容量システム、Ｂは小容量システムであり，大容
量システムのガードバンドに設けられる。ＴＢＲは送信
用の帯域除去フィルタ、ＲＢＲは受信用の帯域除去フィ
ルタ、Ｍは結合器、ＤＣは方向性結合機、ＴＸは送信
機、ＲＸは受信機、ＣＦは送受共用フィルタ、ＡＮＴは
アンテナである。A is a large-capacity system, B is a small-capacity system, and is provided in the guard band of the large-capacity system. TBR is a band elimination filter for transmission, RBR is a band elimination filter for reception, M is a coupler, DC is a directional coupler, TX is a transmitter, RX is a receiver, CF is a transmission / reception shared filter, and ANT is an antenna. is there.
Claims (5)
システムＡと僅少な周波数間隔にある小容量のシステム
Ｂとを結合する併設無線システムにおいて、システムＡ
の受信機Ａの入力部に、システムＢの送信機の出力の主
スペクトル分を除去する受信用の帯域除去フィルタを挿
入し、該システムＡの送信機Ａの出力部に、システムＢ
の受信機の受信相当スペクトルを除去する送信用の帯域
除去フィルタを挿入したことを特徴とする併設無線シス
テム。1. A side-by-side wireless system in which a large-capacity system A and a small-capacity system B located at a small frequency interval are connected to each other via a coupler M.
A band-rejection filter for reception, which removes the main spectrum component of the output of the transmitter of system B, is inserted in the input part of receiver A of
The radio system with a transmission, wherein a band elimination filter for transmission for eliminating the reception equivalent spectrum of the receiver is inserted.
の結合による通過損失は少なくて小容量のシステムＢと
の結合による通過損失が任意の値に定められる方向性結
合器であることを特徴とする請求項１記載の併設無線シ
ステム。2. The coupler M is a directional coupler in which the passage loss due to coupling with the large capacity system A is small and the passing loss due to coupling with the small capacity system B is set to an arbitrary value. The attached wireless system according to claim 1.
合度が、大容量のシステムＡのシステムゲインと小容量
のシステムＢのシステムゲインとの差の半分に選定され
ることを特徴とする請求項２記載の併設無線システム。3. The coupling degree of the directional coupler with the system B side is selected to be half the difference between the system gain of the large capacity system A and the system gain of the small capacity system B. The combined wireless system according to claim 2.
と受信に共通な通路に、二つのサーキュレータで挟まれ
て干渉波を除去し送信波及び受信波を別々に通過させる
二つの帯域除去フィルタから成る送受共用フィルタを挿
入したことを特徴とする請求項１記載の併設無線システ
ム。4. A two-band elimination circuit which is interposed between two circulators in a common passage for transmission and reception on the large capacity system A side of the coupler to eliminate interference waves and allow transmission waves and reception waves to pass separately. The combined wireless system according to claim 1, wherein a transmission / reception common filter including a filter is inserted.
Ｂの送信用分波器と受信用分波器とを一旦まとめた後に
同一アンテナに結合する様にしたことを特徴とする併設
無線システム。5. An attached wireless system, wherein the transmission demultiplexer and the reception demultiplexer of the large-capacity system A and the small-capacity system B are once combined and then coupled to the same antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8042824A JPH09238090A (en) | 1996-02-29 | 1996-02-29 | Ancillary radio system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8042824A JPH09238090A (en) | 1996-02-29 | 1996-02-29 | Ancillary radio system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09238090A true JPH09238090A (en) | 1997-09-09 |
Family
ID=12646713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8042824A Pending JPH09238090A (en) | 1996-02-29 | 1996-02-29 | Ancillary radio system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09238090A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6658263B1 (en) | 1999-12-21 | 2003-12-02 | Lucent Technologies Inc. | Wireless system combining arrangement and method thereof |
| JP2006523054A (en) * | 2003-04-08 | 2006-10-05 | フランス・テレコム | Terminal equipment for bidirectional wireless links |
| JP2007515895A (en) * | 2003-12-20 | 2007-06-14 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Transceiver system including multiple radio base stations sharing antenna |
| JP2010062896A (en) * | 2008-09-04 | 2010-03-18 | Nippon Antenna Co Ltd | Transmission-reception duplexer circuit |
| JP2010062895A (en) * | 2008-09-04 | 2010-03-18 | Nippon Antenna Co Ltd | Transmission-reception duplexer circuit |
| WO2011068061A1 (en) * | 2009-12-03 | 2011-06-09 | 株式会社エヌ・ティ・ティ・ドコモ | Wireless communication terminal |
-
1996
- 1996-02-29 JP JP8042824A patent/JPH09238090A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6658263B1 (en) | 1999-12-21 | 2003-12-02 | Lucent Technologies Inc. | Wireless system combining arrangement and method thereof |
| JP2006523054A (en) * | 2003-04-08 | 2006-10-05 | フランス・テレコム | Terminal equipment for bidirectional wireless links |
| KR101065986B1 (en) * | 2003-04-08 | 2011-09-19 | 프랑스 뗄레꽁 | Terminal device for a bi-directional radio relay link |
| JP2007515895A (en) * | 2003-12-20 | 2007-06-14 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Transceiver system including multiple radio base stations sharing antenna |
| JP2010062896A (en) * | 2008-09-04 | 2010-03-18 | Nippon Antenna Co Ltd | Transmission-reception duplexer circuit |
| JP2010062895A (en) * | 2008-09-04 | 2010-03-18 | Nippon Antenna Co Ltd | Transmission-reception duplexer circuit |
| WO2011068061A1 (en) * | 2009-12-03 | 2011-06-09 | 株式会社エヌ・ティ・ティ・ドコモ | Wireless communication terminal |
| JP2011119980A (en) * | 2009-12-03 | 2011-06-16 | Ntt Docomo Inc | Wireless communication terminal |
| US8768410B2 (en) | 2009-12-03 | 2014-07-01 | Ntt Docomo, Inc. | Radio communication terminal |
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