JPS58150343A - Multi-beam satellite communication system - Google Patents
Multi-beam satellite communication systemInfo
- Publication number
- JPS58150343A JPS58150343A JP3169482A JP3169482A JPS58150343A JP S58150343 A JPS58150343 A JP S58150343A JP 3169482 A JP3169482 A JP 3169482A JP 3169482 A JP3169482 A JP 3169482A JP S58150343 A JPS58150343 A JP S58150343A
- Authority
- JP
- Japan
- Prior art keywords
- transmission power
- area
- satellite
- attenuation
- communication system
- 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
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
- H04B7/204—Multiple access
- H04B7/2041—Spot beam multiple access
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- 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】
（技術分野）
本発明は、通信衛星において、衛星側の送信電力あるい
はアンテナ利得が可変できるマルチビーム衛星通信方式
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a multi-beam satellite communication system in which the transmission power or antenna gain on the satellite side can be varied in a communication satellite.
（背景技術）
従来、マルチビーム衛星通信方式は、通信衛星の送受信
アンテナのアンテナ利得、送信電力が固定的に決められ
ていたため、回線設計並びに伝送容量の変化に対する柔
軟性に欠けるなどの欠点があった。(Background Art) Conventionally, multi-beam satellite communication systems have had drawbacks such as a lack of flexibility in responding to changes in line design and transmission capacity because the antenna gain and transmission power of the communication satellite's transmitting and receiving antennas have been fixed. Ta.
（発明の課題）
本発明は、降雨等により回線品質が劣化した地域並びに
トラヒックの変動等が生じた地域に対し、その地域を照
射するアンテナ利得及び送信電力を可変とすることを特
徴とし、その目的は降雨減衰の影響を軽減すること、ト
ラヒックの変動に柔軟に対処することにある。(Problems to be solved by the invention) The present invention is characterized in that the antenna gain and transmission power for illuminating the area are made variable for areas where line quality has deteriorated due to rain or other factors, or where traffic fluctuations have occurred. The purpose is to reduce the effects of rainfall attenuation and to flexibly deal with traffic fluctuations.
（発明の構成及び作用）
実施例（１）第１図に、被数のＲＦチャネル間の送信電
力配分を可変とすることができる方式の構成例ヲ示す。(Structure and operation of the invention) Embodiment (1) FIG. 1 shows an example of the structure of a system that can make the transmission power distribution between the RF channels variable.
１はマルチビームアンテナ、２は低雑音増幅器、３はダ
ウンコンバータ、４はサテライトスイッチ、５はアップ
コンバータ、６は送信電力制御用アッテネータ、７は高
電力増幅器、８は分波器、９は監視制御用ＣＰＵである
。1 is a multi-beam antenna, 2 is a low noise amplifier, 3 is a down converter, 4 is a satellite switch, 5 is an up converter, 6 is an attenuator for controlling transmission power, 7 is a high power amplifier, 8 is a duplexer, 9 is a monitor This is a control CPU.
１で受信された各エリアの信号は、２で増幅、３で周波
数変換され、４のサテライトスイッチで目的地を照射す
るビームに割当てられる。５で周波数変換された各信号
は、６で適当にレベルを制御され７で共通増幅後、８で
分波され１から送信される。ここで６における減衰量の
制御は、各地域の降雨減衰情報・トラヒック変動情報等
をもとに９のＣＰＵの命令により行われる。この例では
、制御用アッテネータ６はアップコンバータの後に接続
されているが、この順序を入れ替えて、４のサテライト
スイッチの出力を６の制御用アッテネータでレベル設定
した後、５のアップコンバーターで周波数変換、７で共
通増幅する構成でもよい。The signal from each area received at 1 is amplified at 2, frequency converted at 3, and assigned to a beam that illuminates the destination at a satellite switch 4. Each signal frequency-converted at 5 is appropriately level-controlled at 6, common amplified at 7, demultiplexed at 8, and transmitted from 1. Here, the control of the amount of attenuation in 6 is performed by a command from the CPU 9 based on rainfall attenuation information, traffic fluctuation information, etc. of each region. In this example, the control attenuator 6 is connected after the up-converter, but by changing this order, the level of the output of the satellite switch 4 is set by the control attenuator 6, and then the frequency is converted by the up-converter 5. , 7 may be commonly amplified.
このような構成になっているので、７の送信用増幅器の
送信電力を一定としながら各ＲＦチャネルの送信電力を
可変とすることができる。With this configuration, it is possible to make the transmission power of each RF channel variable while keeping the transmission power of the transmitting amplifier 7 constant.
第２図は、マルチビーム配置の概念図を示したものであ
る。エリア１には第１図のｆ、・（１，、エリア２には
ｆ、・ｆ′２、以下エリアｎにｔｎ、親に対応するマル
チビームがそれぞれ割当てられているものとする。FIG. 2 shows a conceptual diagram of the multi-beam arrangement. Assume that area 1 is assigned f, .(1, in FIG. 1), area 2 is assigned f, .f'2, area n is assigned tn, and multibeams corresponding to the parent are respectively assigned.
実施例（１）の場合、例えばエリア１で非常に強い降雨
、エリア２で弱い降雨が発生しており、その他のエリア
では晴天の時は、６のＡＴＴＩは減艮量を小さく、ＡＴ
Ｔ２をやや小さく、その他のＡＴＴの減衰量を大きくし
、合計で規定の送信電力になるよう９のＣＰＵで制御す
る。このようＶこすることにより、複数のエリアへの送
信電力をそれぞれ可変とすることができる。In the case of Example (1), for example, when very heavy rainfall occurs in Area 1 and weak rainfall occurs in Area 2, and the weather is clear in other areas, an ATTI of 6 will reduce the amount of attenuation and reduce the ATTI.
The CPU No. 9 controls T2 to be slightly smaller and the attenuation amounts of the other ATTs to be larger so that the total transmit power reaches the specified transmission power. By applying V in this manner, it is possible to make the transmission power to each of a plurality of areas variable.
実施例（２）第３図に、各マルチビームに固定に接続さ
れる送信電力増幅器の他に各マルチビームへの接続が可
変できる送信電力増幅器を有し、固定送信電力増幅器と
接続可変送信電力増幅器の出力を合成することにより、
送信電力を可変とすることができる方式の構成例を示す
。Embodiment (2) In Fig. 3, in addition to the transmission power amplifier that is fixedly connected to each multi-beam, there is also a transmission power amplifier that can be connected to each multi-beam in a variable manner. By combining the outputs of the amplifiers,
An example of a configuration of a method that can make transmission power variable is shown.
１から５までの動作は、実施例（１）と同様である。The operations from 1 to 5 are the same as in the embodiment (1).
５で送信用周波数に変換された各チャネルの信号は、１
０で増幅される。一方、６では実施例（Ｌ）と同様に各
チャネルの電力配分を可変し、７で共通増幅後８０分波
器を経て、１１で１０の出力と位相合成して１のマルチ
ビームにそれぞれ接続される。この動作を説明すると、
ｌで受信された信号を２で増幅、３で周波数変換した後
、４のサテライトスイッチで目的地を照射するビームへ
割当て、５で周波数変換、１０で増幅した後、１のマル
チビームで送信される。ここで、９のＣＰＵは各地域の
降雨減衰情報・トラヒック章動情報等をもとに１２のス
イッチを動作させ、任意のＲ’Ｆチャネルの信号を１３
のスポットビームに接続する。スポットビーム１３は、
同じく９のＣＰＵの命令で動作する１４のスポットビー
ム走査用ドライバにより、任意の地域へ向けられる。又
、同時に９のＣＰＵの命令でに接続する。The signal of each channel converted to the transmission frequency in step 5 is 1
It is amplified by 0. On the other hand, in 6, the power distribution of each channel is varied as in Example (L), and after common amplification in 7, it passes through an 80 demultiplexer, and in 11, the phase is combined with the output of 10, and each is connected to 1 multi-beam. be done. To explain this behavior,
After the signal received at 1 is amplified at 2 and frequency converted at 3, it is assigned to the beam that illuminates the destination at the satellite switch 4, frequency converted at 5, amplified at 10, and then transmitted as a multi-beam at 1. Ru. Here, the CPU 9 operates 12 switches based on the rainfall attenuation information, traffic nutation information, etc. of each region, and transmits the signal of any R'F channel to 13.
Connect to the spot beam. The spot beam 13 is
Fourteen spot beam scanning drivers, which also operate under the instructions of nine CPUs, direct the beam to any desired area. Also, it connects to 9 CPUs at the same time.
このことにより、任意の地域に対して衛星の送信電力及
びアンテナ利得を可変とすることができる。This allows the satellite transmission power and antenna gain to be made variable for any area.
以上の実施例において、ｎ個のマルチビームヘによる構
成の特殊な場合として、ｎ ＝ １の時（シングルビー
ム）の場合も同様に適用できる。又、実施例（２）では
、７・１２・１３・１４・１５の系を複数個持つことに
より、複数の地域の送信電力・アンテナ利得を可変とで
きる。このような構成となっているので、各マルチビー
ムに接続される送信電力を可変とすることができる。In the above embodiments, as a special case of the configuration using n multi-beams, the case where n = 1 (single beam) can be similarly applied. Further, in the embodiment (2), by having a plurality of 7, 12, 13, 14, and 15 systems, the transmission power and antenna gain in a plurality of regions can be made variable. With such a configuration, the transmission power connected to each multi-beam can be made variable.
ここで、６′及び８の部分を９のＣＰＵの命令により動
作する不イッチにおきかえることにより、任意のＲ，Ｆ
チャネルの送信電力だけを変化させるとともできる。Here, by replacing parts 6' and 8 with non-switches that operate according to instructions from the CPU in 9, any R, F
This can be done by changing only the transmission power of the channel.
実施例（３）第４図に、各マルチビームに固定的に接続
される送信電力増幅器の他に走査可能なスポットビーム
に接続される送信電力増幅器を有することにより、衛星
の送信電力及びアンテナ利得を可変とする方式の構成例
を示す。Embodiment (3) As shown in FIG. 4, by having a transmission power amplifier connected to a scannable spot beam in addition to a transmission power amplifier fixedly connected to each multi-beam, the transmission power and antenna gain of the satellite can be increased. An example of the configuration of a method that makes variable is shown below.
ｌはマルチビームアンテナ、２・３・４・５・１０はそ
れぞれ低雑音増幅器・ダウンコンバータ・サテライトス
イッチ・アップコンバータ・高電力増幅器である。９は
監視制御用ＣＰＵ、７は全チャネル用高電力増幅器、１
２は送信用スイッチ、１３は走査可能なスポットビーム
、１４はスポットビーム走査用ドライバ、１５は受信用
スイッチ、１６は位相合成器である。1 is a multi-beam antenna, and 2, 3, 4, 5, and 10 are low noise amplifiers, down converters, satellite switches, up converters, and high power amplifiers, respectively. 9 is a CPU for monitoring and control, 7 is a high power amplifier for all channels, 1
2 is a transmitting switch, 13 is a scannable spot beam, 14 is a spot beam scanning driver, 15 is a receiving switch, and 16 is a phase synthesizer.
（発明の効果）
以上説明したように、降雨等により回線品質が劣化した
地域、トラヒックの変動等が生じた地域に対し、衛星の
送信電力あるいはアンテナ利得を可変とすることにより
、降雨減衰の影響を軽減する、トラヒックの変動に柔軟
に対処することができる。(Effects of the Invention) As explained above, by making the satellite transmission power or antenna gain variable in areas where line quality has deteriorated due to rain, etc., or where traffic fluctuations have occurred, the effects of rain attenuation can be improved. It is possible to flexibly deal with traffic fluctuations.
第１図は本発明の第１の実施例の構成図、第２図はマル
チビーム配置の概念図、第３図は本発明の第２の実施例
の構成図、第４図は本発明の第３の実施例の構成図であ
る。
１・・・・・・・・・マルチビームアンテナ２・・・・
・・・・・低雑音増幅器
３・・・・・・・・・タウンコンバータ４・・・・・・
・・・サテライトスイッチ５・・・・・・・・・アップ
コンバータ６・・・・・・・・・送信電力制御用アッテ
ネータ７・・・・・・・・・送信用増幅器（共通）８・
・・・・・・・・分波器
９・・・・・・・・・監視制御用ＣＰＵ１０・・・・・
・・・・送信用増幅器（各チャネル独立）１１・・・・
・・・・・送信用位相合成器１２・・・・・・・・・送
信用スイッチ１３・・・・・・・・・走査可能なスポッ
トビーム１４・・・・・・・・・スポットビーム走査用
ドライバ１５・・・・・・・・・受信用スイッチ１６・
・・・・・・・・受信用位相合成器特許出願人 日本電
信電話公社Fig. 1 is a block diagram of a first embodiment of the present invention, Fig. 2 is a conceptual diagram of a multi-beam arrangement, Fig. 3 is a block diagram of a second embodiment of the present invention, and Fig. 4 is a block diagram of a second embodiment of the present invention. FIG. 3 is a configuration diagram of a third embodiment. 1...Multi-beam antenna 2...
...Low noise amplifier 3...Town converter 4...
... Satellite switch 5 ...... Up converter 6 ...... Transmission power control attenuator 7 ...... Transmission amplifier (common) 8.
・・・・・・・Brancher 9 ・・・・・・Supervisory control CPU 10 ・・・・・
...Transmission amplifier (each channel independent) 11...
...Transmission phase synthesizer 12 ...Transmission switch 13 ... Scannable spot beam 14 ... Spot beam Scanning driver 15...Receiving switch 16.
...Receiving phase synthesizer patent applicant Nippon Telegraph and Telephone Public Corporation
Claims (2)
も一方をビーム毎に可変とするマルチビーム衛星通信方
式において、各スポットビーム毎の信号を対応−する可
変アッテネータを介して単一の固定電力の電力増幅器で
共通に増幅し、その出力を各ビームに接続し、アッテネ
ータのビーム毎の制御によりビーム毎の送信電力を制御
することを特徴とするマルチビーム衛星通信方式。(1) In a multi-beam satellite communication system in which at least one of the satellite's transmission power and antenna gain is variable for each beam, the signal for each spot beam is transmitted to a single fixed power power amplifier via a corresponding variable attenuator. A multi-beam satellite communication system characterized by commonly amplifying the beam, connecting the output to each beam, and controlling the transmission power for each beam by controlling each beam with an attenuator.
方をビーム毎に可変とするマルチビーム衛星通信方式に
おいて、各ビーム対応に固定的に接続される固定電力の
電力増幅器と、各ビームに共通の別の共通電力増幅器と
が具備され、共通電力増幅器の出力を所望のビームに合
成又は切替えることを特徴とするマルチビーム衛星通信
方式。(2) In a multi-beam satellite communication system in which at least one of the satellite's transmission power and antenna gain is variable for each beam, a fixed power power amplifier fixedly connected to each beam and a common amplifier for each beam are used. A multi-beam satellite communication system comprising: a common power amplifier; and combining or switching the outputs of the common power amplifiers into a desired beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3169482A JPS58150343A (en) | 1982-03-02 | 1982-03-02 | Multi-beam satellite communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3169482A JPS58150343A (en) | 1982-03-02 | 1982-03-02 | Multi-beam satellite communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58150343A true JPS58150343A (en) | 1983-09-07 |
Family
ID=12338179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3169482A Pending JPS58150343A (en) | 1982-03-02 | 1982-03-02 | Multi-beam satellite communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58150343A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62199131A (en) * | 1986-02-26 | 1987-09-02 | Nec Corp | Satellite communication system |
| JPS62199130A (en) * | 1986-02-26 | 1987-09-02 | Nec Corp | Satellite communication system |
| JPH0399527A (en) * | 1989-09-05 | 1991-04-24 | Motorola Inc | Electric power management system for wide area multiplex satellite communication system |
| JPH03117232A (en) * | 1989-09-29 | 1991-05-20 | Uchu Tsushin Kiso Gijutsu Kenkyusho:Kk | Satellite broadcast system |
| JPH0541683A (en) * | 1991-08-07 | 1993-02-19 | Kokusai Denshin Denwa Co Ltd <Kdd> | Transmission power control system for satellite communication and broadcasting |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5116730A (en) * | 1974-08-02 | 1976-02-10 | Nippon Kokan Kk | KOJUHOHO |
| JPS51134510A (en) * | 1975-05-17 | 1976-11-22 | Oki Electric Ind Co Ltd | Program transmission equipment |
-
1982
- 1982-03-02 JP JP3169482A patent/JPS58150343A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5116730A (en) * | 1974-08-02 | 1976-02-10 | Nippon Kokan Kk | KOJUHOHO |
| JPS51134510A (en) * | 1975-05-17 | 1976-11-22 | Oki Electric Ind Co Ltd | Program transmission equipment |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62199131A (en) * | 1986-02-26 | 1987-09-02 | Nec Corp | Satellite communication system |
| JPS62199130A (en) * | 1986-02-26 | 1987-09-02 | Nec Corp | Satellite communication system |
| JPH0547135B2 (en) * | 1986-02-26 | 1993-07-15 | Nippon Electric Co | |
| JPH0547136B2 (en) * | 1986-02-26 | 1993-07-15 | Nippon Electric Co | |
| JPH0399527A (en) * | 1989-09-05 | 1991-04-24 | Motorola Inc | Electric power management system for wide area multiplex satellite communication system |
| JPH03117232A (en) * | 1989-09-29 | 1991-05-20 | Uchu Tsushin Kiso Gijutsu Kenkyusho:Kk | Satellite broadcast system |
| JPH0541683A (en) * | 1991-08-07 | 1993-02-19 | Kokusai Denshin Denwa Co Ltd <Kdd> | Transmission power control system for satellite communication and broadcasting |
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