JPH04351021A - Synthesis branch device - Google Patents
Synthesis branch deviceInfo
- Publication number
- JPH04351021A JPH04351021A JP3124215A JP12421591A JPH04351021A JP H04351021 A JPH04351021 A JP H04351021A JP 3124215 A JP3124215 A JP 3124215A JP 12421591 A JP12421591 A JP 12421591A JP H04351021 A JPH04351021 A JP H04351021A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- control circuit
- odu
- control
- power supply
- 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
- 230000015572 biosynthetic process Effects 0.000 title abstract description 11
- 238000003786 synthesis reaction Methods 0.000 title abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000000284 extract Substances 0.000 claims abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 239000000969 carrier Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
Landscapes
- Transceivers (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は合成分波装置に関し、特
にIDU(In door unit)、ODU(
Out door unit)及び超小型アンテナ
部を備えた小型地球局(通常VSATと称する)におい
て、多数のIDUと1個のODUの間のインタフェース
として接続され、IDUの多数のキャリアを一つのOD
Uで送受信するための合成分波装置に関する。[Industrial Application Field] The present invention relates to a synthesis/demultiplexing device, and in particular to an IDU (Indoor unit), an ODU (
In a small earth station (usually referred to as a VSAT) equipped with an out door unit (out door unit) and a very small antenna unit, it is connected as an interface between many IDUs and one ODU, and connects many carriers of the IDU to one OD.
The present invention relates to a combining and demultiplexing device for transmitting and receiving in the U.
【0002】0002
【従来の技術】従来のVSATの構成は、図3に示すよ
うに、3個の変復調器を内部に備えたIDUを合成分波
して、高周波部を内部に備えたODUに伝送する際のイ
ンタフェースとなる合成分波装置本体22からなってい
る。図3において3個のIDU1−1〜1−3はインタ
フェースケーブル10−1〜10−3を通して、合成分
波装置本体22に入力されていた。合成分波装置本体2
2では、マルチプレクサ6−1〜6−3で各IDU1−
1〜1−3からの送信信号のみ取り出し、さらに送信信
号合成器7にて3波を合成する。受信信号についても、
受信信号分波器8にて、3個に分波された後、マルチプ
レクサ6−1〜6−3に入力される。又、各IDU1−
1〜1−3からの制御信号は制御信号合成器20へ入力
され、ODU11の出力レベルを規定の値にする様に制
御している。以上の送信信号合成器7の出力と受信信号
分波器8の入力及び制御信号合成器20の出力信号と電
源21の出力電圧とがマルチプレクサ9にて、各波形を
合成分波し一本の同軸ケーブル9Aを通してODU11
に伝送する機能をもっていた。[Prior Art] As shown in FIG. 3, a conventional VSAT has a configuration that combines and demultiplexes an IDU equipped with three modems and transmits it to an ODU equipped with a high-frequency section. It consists of a synthesis/demultiplexing device main body 22 that serves as an interface. In FIG. 3, three IDUs 1-1 to 1-3 are input to the synthesis/demultiplexing device main body 22 through interface cables 10-1 to 10-3. Combiner/demultiplexer main body 2
2, multiplexers 6-1 to 6-3 each IDU1-
Only the transmission signals from 1 to 1-3 are taken out, and the three waves are further combined in a transmission signal combiner 7. Regarding the received signal,
After the received signal is split into three parts by the reception signal splitter 8, the signals are input to the multiplexers 6-1 to 6-3. Also, each IDU1-
Control signals from 1 to 1-3 are input to a control signal synthesizer 20, which controls the output level of the ODU 11 to a specified value. The output of the transmitting signal combiner 7, the input of the received signal demultiplexer 8, the output signal of the control signal combiner 20, and the output voltage of the power supply 21 are combined and demultiplexed by the multiplexer 9 to form a single waveform. ODU11 through coaxial cable 9A
It had the ability to transmit data to
【0003】0003
【発明が解決しようとする課題】上述した従来の合成分
波装置は、合成分波装置本体22に必要な制御信号合成
回路20を動作させるためと、ODU11用の直流電圧
を供給するための電源21を持つ必要がある。したがっ
て本装置自体が大きくなることとなる。一方、本装置自
体には多数のIDUが接続されるために、本装置の信頼
度は電源の信頼度によりほとんど決定されることとなり
、このVSAT地球局の信頼度を悪くする原因となる欠
点があった。[Problems to be Solved by the Invention] The conventional synthesis/demultiplexing device described above requires a power source for operating the control signal synthesis circuit 20 necessary for the synthesis/demultiplexing device main body 22 and for supplying the DC voltage for the ODU 11. Must have 21. Therefore, the device itself becomes large. On the other hand, since a large number of IDUs are connected to this device itself, the reliability of this device is mostly determined by the reliability of the power supply, and there are drawbacks that reduce the reliability of this VSAT earth station. there were.
【0004】0004
【課題を解決するための手段】本発明の合成分波装置は
変復調器を有する複数個のIDU(In dooru
nit)と、高周波部を有する1個のODU(Out
door unit)と、衛星との送受信電波を放
射するアンテナ部と、前記複数のIDUと前記ODUと
の間に接続されて送信信号,受信信号,制御信号の授受
を行う制御回路を有する合成分波装置において、前記制
御回路内に制御信号成分に含まれる直流信号を抽出し、
前記ODUに前記直流信号を電源として供給するととも
に、自制御回路の電源としても利用する制御手段を有す
る。[Means for Solving the Problems] The synthesis/demultiplexing device of the present invention has a plurality of IDUs (Indoor Units) each having a modulator/demodulator.
nit) and one ODU (Out
door unit), an antenna section that emits radio waves transmitted and received from the satellite, and a control circuit that is connected between the plurality of IDUs and the ODU and exchanges transmission signals, reception signals, and control signals. In the apparatus, extracting a DC signal included in a control signal component in the control circuit,
It has a control means that supplies the DC signal to the ODU as a power source and also uses it as a power source for its own control circuit.
【0005】[0005]
【実施例】次に本発明について図面を参照して説明する
。図1は本発明の一実施例の合成分波装置を含むVSA
Tの構成図、図2は本実施例の要部の制御回路1の構成
図である。図1の実施例において図3の従来例と同一の
符号は同一の機能と構成を有する。すなわち、本実施例
では従来例の電源21を不要とし、制御回路1において
IDU1−1〜1−3から入力される直流信号から電源
を生成している。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1 shows a VSA including a combining/demultiplexing device according to an embodiment of the present invention.
FIG. 2 is a block diagram of the main part of the control circuit 1 of this embodiment. In the embodiment of FIG. 1, the same reference numerals as in the conventional example of FIG. 3 have the same functions and configurations. That is, in this embodiment, the power source 21 of the conventional example is not required, and the power source is generated in the control circuit 1 from the DC signals inputted from the IDUs 1-1 to 1-3.
【0006】次に本実施例の制御回路1の構成と動作を
図2により説明する。マルチプレクサ6−1〜6−3の
各出力が制御回路2へ入力される。制御回路2は各入力
信号の制御信号を検出し、キャリアの送信数に応じてO
DU11の出力レベルを変更するよう制御データを作り
、その制御データ信号をODU11へインタフェースす
ることによりODU11の自動レベル制御回路を制御す
るよう動作する。一方、マルチプレクサ6−1〜6−3
の各入力は、ダイオード5A〜5Cを通して合成される
ことにより、各IDU1−1〜1−3から出力される低
周波成分が合成されることになる。この合成信号は、低
域ろ波器3を通すことにより、制御信号が減衰されて直
流信号3Aのみが得られる。直流信号3Aと前述した制
御回路2の出力信号は合成器4で合成される。一方、直
流信号3Aは制御回路2の動作電圧としても使用される
。Next, the configuration and operation of the control circuit 1 of this embodiment will be explained with reference to FIG. Each output of multiplexers 6-1 to 6-3 is input to control circuit 2. The control circuit 2 detects the control signal of each input signal and outputs O according to the number of transmitted carriers.
It operates to control the automatic level control circuit of ODU 11 by creating control data to change the output level of DU 11 and interfacing the control data signal to ODU 11. On the other hand, multiplexers 6-1 to 6-3
By combining the inputs through the diodes 5A to 5C, the low frequency components output from the IDUs 1-1 to 1-3 are combined. This composite signal is passed through a low-pass filter 3, whereby the control signal is attenuated and only a DC signal 3A is obtained. The DC signal 3A and the output signal of the control circuit 2 described above are combined by a combiner 4. On the other hand, the DC signal 3A is also used as the operating voltage of the control circuit 2.
【0007】以上述べたように各IDU1−1〜1−3
からODU11の動作用に使用されていた直流電圧を利
用して、制御回路2も動作できるので、合成分波装置本
体13に特別な電源を用意する必要がないことになる。As described above, each IDU 1-1 to 1-3
Since the control circuit 2 can also operate using the DC voltage that was used for operating the ODU 11, there is no need to provide a special power source for the main unit 13 of the combining/demultiplexing device.
【0008】[0008]
【発明の効果】以上説明したように本発明は、合成分波
装置に制御回路を設けることにより、特別な電源を不要
とするので、その機械的寸法を小さくできるとともに、
共通部に電源をもたないため地球局全体の信頼度を上げ
る効果がある。さらに、本発明では、各IDUの直流電
源電圧をダイオードで合成し並列運転をしているので、
いずれかのIDUの電源が故障しても正常なIDUで通
信を継続できる効果もある。As explained above, the present invention eliminates the need for a special power source by providing a control circuit in the synthesis/demultiplexing device, so that its mechanical dimensions can be reduced, and
Since there is no power source in the common area, it has the effect of increasing the reliability of the entire earth station. Furthermore, in the present invention, since the DC power supply voltages of each IDU are combined using diodes and operated in parallel,
This also has the effect that even if the power supply of one of the IDUs fails, communication can continue with the normal IDU.
【図1】本発明の一実施例の合成分波装置を含む構成図
である。FIG. 1 is a configuration diagram including a combining/demultiplexing device according to an embodiment of the present invention.
【図2】本実施例の要部の制御回路の構成図である。FIG. 2 is a configuration diagram of a main part of a control circuit of this embodiment.
【図3】従来の合成分波装置を含む構成図である。FIG. 3 is a configuration diagram including a conventional combining/demultiplexing device.
1,2 制御回路
3 低域ろ波器
4 合成器
5A〜5C 合成用ダイオード
6−1〜6−3,9 マルチプレクサ7
送信信号合成器
8 受信信号分波器
1−1〜1−3 IDU
11 ODU
12 アンテナ
13 合成分波装置本体
21 電源1, 2 Control circuit 3 Low-pass filter 4 Combiners 5A to 5C Combining diodes 6-1 to 6-3, 9 Multiplexer 7
Transmission signal combiner 8 Reception signal demultiplexer 1-1 to 1-3 IDU 11 ODU 12 Antenna 13 Synthesis/demultiplexer main body 21 Power supply
Claims (2)
n door unit)と、高周波部を有する1
個のODU(Out door unit)と、衛
星との送受信電波を放射するアンテナ部と、前記複数の
IDUと前記ODUとの間に接続されて送信信号,受信
信号,制御信号の授受を行う制御回路を有する合成分波
装置において、前記制御回路内に制御信号成分に含まれ
る直流信号を抽出し、前記ODUに前記直流信号を電源
として供給するとともに、自制御回路の電源としても利
用する制御手段を有することを特徴とする合成分波装置
。Claim 1: A plurality of IDUs (IDUs) each having a modem and a modem.
n door unit) and 1 with a high frequency section.
an antenna section that emits radio waves transmitted and received from the satellite; and a control circuit that is connected between the plurality of IDUs and the ODU and exchanges transmission signals, reception signals, and control signals. In the combining/demultiplexing device, the control means extracts a DC signal included in a control signal component in the control circuit, supplies the DC signal to the ODU as a power source, and also uses the DC signal as a power source for a self-control circuit. A combining/demultiplexing device comprising:
号をそれぞれ入力するマルチプレクサと、このマルチプ
レクサの出力信号を合成するダイオードと、このダイオ
ードの出力信号から直流成分を出力する低域ろ波器と、
制御回路により抽出された制御信号と前記直流成分とを
合成するマルチプレクサとを備えていることを特徴とす
る請求項1記載の合成分波装置。2. The control means comprises a multiplexer into which the signals of the plurality of IDUs are respectively input, a diode which combines the output signals of the multiplexer, and a low-pass filter which outputs a DC component from the output signal of the diode. ,
2. The combining/demultiplexing device according to claim 1, further comprising a multiplexer that combines the control signal extracted by the control circuit and the DC component.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3124215A JPH04351021A (en) | 1991-05-29 | 1991-05-29 | Synthesis branch device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3124215A JPH04351021A (en) | 1991-05-29 | 1991-05-29 | Synthesis branch device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04351021A true JPH04351021A (en) | 1992-12-04 |
Family
ID=14879849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3124215A Pending JPH04351021A (en) | 1991-05-29 | 1991-05-29 | Synthesis branch device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04351021A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002075960A1 (en) * | 2001-03-16 | 2002-09-26 | U.S. Monolithics, L.L.C. | System and method for uplink power control |
US6771930B2 (en) | 2001-03-16 | 2004-08-03 | U.S. Monolithics, L.L.C. | System and method for uplink power control |
US7010266B2 (en) | 2001-05-24 | 2006-03-07 | Viasat, Inc. | Power control systems and methods for use in satellite-based data communications systems |
-
1991
- 1991-05-29 JP JP3124215A patent/JPH04351021A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002075960A1 (en) * | 2001-03-16 | 2002-09-26 | U.S. Monolithics, L.L.C. | System and method for uplink power control |
US6771930B2 (en) | 2001-03-16 | 2004-08-03 | U.S. Monolithics, L.L.C. | System and method for uplink power control |
US7006791B2 (en) | 2001-03-16 | 2006-02-28 | U.S. Monolithics, L.L.C. | System and method for uplink power control by detecting amplifier compression point using dc current detection |
US7010266B2 (en) | 2001-05-24 | 2006-03-07 | Viasat, Inc. | Power control systems and methods for use in satellite-based data communications systems |
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