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JPS6072337A - On-satellite repeator - Google Patents

On-satellite repeator

Info

Publication number
JPS6072337A
JPS6072337A JP58178245A JP17824583A JPS6072337A JP S6072337 A JPS6072337 A JP S6072337A JP 58178245 A JP58178245 A JP 58178245A JP 17824583 A JP17824583 A JP 17824583A JP S6072337 A JPS6072337 A JP S6072337A
Authority
JP
Japan
Prior art keywords
power
power amplifier
satellite
signal
switch
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
Application number
JP58178245A
Other languages
Japanese (ja)
Inventor
Hideo Okinaka
冲中 秀夫
Yutaka Yasuda
豊 安田
Yasuo Hirata
康夫 平田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP58178245A priority Critical patent/JPS6072337A/en
Publication of JPS6072337A publication Critical patent/JPS6072337A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/204Multiple access
    • H04B7/2046SS-TDMA, TDMA satellite switching
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To make a distribution switch highly reliable and effective use of power, by installing power amplifiers whose power consumption becomes zero or is reduced when no input signal exists to every transmitting antennas and arranging the distribution switch to the input side of the amplifier. CONSTITUTION:Power amplifiers 3-3 of a type whose power consumption is zero or reduced when no input signal exists are installed to each of plural transmitting beam antennas 5-5 for exclusive use. Moreover, a distribution switch 4 is provided between the input of the amplifiers 3-3 and the output of a receiver 2 connected to a receiving antenna 1. Then, in accordance with the destination beam of received burst signals, the connected condition of the switch 4 is controlled and burst signals are simultaneously transmitted from the antennas 5-5 whose number is less than the total beam number. Therefore, the switch 4 is made highly reliable and the power consumption can be economized.

Description

【発明の詳細な説明】 (技術分野) 本発明は、ディノタル衛星通信システムにおけ□ る衛星搭載用中継器に関するものである。 1□ (背景技術) 1 □ 一般に衛星通信システムでは、衛星の電源!力に厳しい
制約があるため、いかに電源電力を有効に使用するかが
、衛星の経済設計を行って行く上で重要なポイントとな
っている。海事衛星通信等、移動体を対象とする衛星通
信システムでは移動局設備、特にアンテナの大きさに制
限があるので、衛星から移動局向けの回線で所要回線品
質を得るために、チャネル当シの衛星e、i−r、p、
(実効放射電力)を、従来の固定局間衛星通信システム
におけるそれに比べて、例えば100倍程度と、相当大
きくする必要がある。この様なシステムにおいて、所要
の衛星中継容量、即ち所要の衛星e、i、r−p、を経
済的に実現する方法のひとつに、衛星をマルチスポット
ビーム化し、TDMAによって固定局から衛星にアクセ
スされた信号を、衛星上においてバースト単位で宛先移
動局を照射するスポットビームへ分配するシステム構成
がある。
DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a satellite-mounted repeater in a Dinotal satellite communication system. 1□ (Background technology) 1 □ Generally, in a satellite communication system, the power source of the satellite! Since there are severe constraints on power, how to use the power source effectively is an important point in the economic design of satellites. In satellite communication systems for mobile objects such as maritime satellite communication, there are restrictions on the size of mobile station equipment, especially antennas. Satellite e, ir, p,
(effective radiated power) needs to be considerably larger, for example, about 100 times, compared to that in a conventional inter-fixed station satellite communication system. In such a system, one way to economically realize the required satellite relay capacity, that is, the required satellite e, i, r-p, is to convert the satellite into a multi-spot beam and access the satellite from a fixed station using TDMA. There is a system configuration in which the received signal is distributed onto a satellite into spot beams that illuminate a destination mobile station in burst units.

第1図は、上述の様な構成のシステムに用いら些ている
衛星搭載用中継器の一構成例を示すグロック図である。
FIG. 1 is a block diagram showing an example of the configuration of a satellite-mounted repeater used in a system configured as described above.

同図において、1は通信衛星の受信アンテナ、2は受信
機、3は電力増幅器、4は電力増幅器3の出力信号の供
給先を高速で切替える分配スイッチ、5は通信衛星の送
信アンテナである。なお、同図の例では、受信アンテナ
はひとつ、また送信アンテナは4つのスポットビームが
ら構成されるものとしている。
In the figure, 1 is a receiving antenna of a communication satellite, 2 is a receiver, 3 is a power amplifier, 4 is a distribution switch that switches the supply destination of the output signal of the power amplifier 3 at high speed, and 5 is a transmitting antenna of the communication satellite. In the example shown in the figure, it is assumed that there is one receiving antenna and that the transmitting antenna is composed of four spot beams.

第1図の従来例の場合、受信アンテナ1で受信・ され
たTDMAバースト信号は、受信機2において増幅およ
び周波数変換が行われ、電力増幅器3において電力増幅
された後、分配スイッチ4に導びかれる。分配スイッチ
4では、各受信バースト信号毎に、送信アンテナ5のな
かで宛先局を照射するスポットビームアンテナへ信号を
分配する。
In the case of the conventional example shown in FIG. 1, a TDMA burst signal received by a receiving antenna 1 is amplified and frequency converted in a receiver 2, power amplified in a power amplifier 3, and then guided to a distribution switch 4. It will be destroyed. The distribution switch 4 distributes the signal for each received burst signal to a spot beam antenna among the transmitting antennas 5 that illuminates the destination station.

以上述べた信号の処理過程では、分配スイッチ4におい
て高電力の信号を高速度で切替える必要があるため、ス
イッチの信頼度に問題があった。
In the signal processing process described above, since it is necessary to switch high-power signals at high speed in the distribution switch 4, there is a problem in the reliability of the switch.

また、高電力信号を受取っているため、スイッチの電力
損失の絶対量が大きくなり、通信衛星上で最も大きな電
力を消費して発生される送信搬送波を有効に利用できず
、衛星の電源電力の有効利用が図れないという問題があ
った。
In addition, since the switch receives high-power signals, the absolute amount of power loss in the switch is large, making it impossible to effectively utilize the transmission carrier wave generated by consuming the largest amount of power on a communication satellite, and reducing the power consumption of the satellite's power supply. There was a problem that it could not be used effectively.

(発明の課題) 本発明は、上述の問題を解決するためになされたもので
あり、高信頼度かつ消費電力の節約を実現することがで
きる、信号分配機能付きの衛星搭載用中継器を提供する
ことを目的とする。
(Problems to be solved by the invention) The present invention has been made to solve the above-mentioned problems, and provides a satellite repeater with a signal distribution function that can achieve high reliability and save power consumption. The purpose is to

(発明の構成および作用) 第2図は、本発明を適用した衛星搭載用中継器の第1の
実施例である。本実施例では、受信機2と電力増幅器3
の間に分配スイッチ4を置くとともに、電力増幅器3に
入力信号が零の時に電力消費が零となるあるいは減少す
る型のものを用いることによって、スイッチの高信頼度
化および消費電力の節約を図りつつ、第1図と同じ機能
を実現している。°電力増幅器3としては、例えばC級
電力増幅器が考えられる。6は帯域通過フィルタであり
、電力増幅器3で発生する場合がある不要波を遮断する
だめのフィルタである。第3図は、受信信号の各ビーム
アンテナへの分配手順と各電力増幅器3で消費される電
力を、横軸に時間tをとって説明している図であり、こ
れを用いながら第2図の実施例を説明する。第3図(a
)に示すように、TDMAフレームは区間τ1 、τ 
τ3 、τ4に分I 割されている。そして、受信アンテナ11受信機2によ
って受信される信号は、区間τ1はビームA向け、区間
τ2はビームB向け、区間τ3はビームC向け、区間τ
4はビームD向けのTDMAパースト信号となっている
。これらの受信バースト信号は、分配スイッチ4によっ
て目的のビームを発生ずる送信アンテナ7に接続された
電力増幅器3に適宜分配される。即ち、ビームA用の電
力増幅器3(A)に対しては第3図(b)のように区間
τlの信号が、ビームB用の電力増幅器3(B)に対し
ては第3図(c)のように区間τ2の信号が、ビームC
用の電力増幅器3(C)に対してdコ第3図(d)のよ
うに区間τ3の信号が、ビームD用の電力増幅器3(D
)に対しては第3図(e)のように区間τ4の信号が、
それぞれ入力される。電力増幅器3をC級増幅器とした
場合、電力増幅器3は入力信号がない時間は電源電力の
消費が零となるので、電力増幅器3(〜では第3図(f
)のように区間τ1のみ、電力増幅器3(B)では第3
図(g)のように区間τ2のみ、電力増幅器3(C)で
は第3図(h)のように区間τ3のみ、電力増幅器3(
6)では第3図(i)のように区間τ4のみ、それぞれ
電力が消費される。したがって、電力増幅器3全体では
、第3図(j)に示すように、どの時間帯でも電力増幅
器1個分の電力が消費されることになり、各ビーム毎に
専用の電力増幅器を用いることによる電源電力消費の増
加はない。
(Structure and operation of the invention) FIG. 2 shows a first embodiment of a satellite-mounted repeater to which the present invention is applied. In this embodiment, the receiver 2 and the power amplifier 3
In addition to placing a distribution switch 4 between them, the power amplifier 3 is of a type that reduces power consumption to zero when the input signal is zero, thereby increasing the reliability of the switch and saving power consumption. However, it achieves the same functions as in Figure 1. As the power amplifier 3, for example, a class C power amplifier can be considered. Reference numeral 6 denotes a band pass filter, which is used to block unnecessary waves that may be generated by the power amplifier 3. FIG. 3 is a diagram that explains the procedure for distributing the received signal to each beam antenna and the power consumed by each power amplifier 3, with time t plotted on the horizontal axis. An example will be explained. Figure 3 (a
), the TDMA frame has sections τ1, τ
It is divided into τ3 and τ4. The signal received by the receiving antenna 11 receiver 2 is directed to beam A in section τ1, to beam B in section τ2, to beam C in section τ3, and in section τ
4 is a TDMA burst signal for beam D. These received burst signals are appropriately distributed by a distribution switch 4 to a power amplifier 3 connected to a transmitting antenna 7 that generates a target beam. That is, the power amplifier 3(A) for beam A receives a signal in the interval τl as shown in FIG. 3(b), and the power amplifier 3(B) for beam B receives a signal in FIG. ), the signal in the interval τ2 is transmitted to the beam C
As shown in FIG. 3(d), the signal in interval τ3 is transmitted to power amplifier 3 (D) for beam D.
), the signal in section τ4 as shown in Figure 3(e) is
Each is input. When the power amplifier 3 is a class C amplifier, the power amplifier 3 consumes zero power from the power supply during the time when there is no input signal.
), only the interval τ1, the third
As shown in Fig. 3(g), only the section τ2, and the power amplifier 3(C) only the section τ3 as shown in Fig. 3(h).
In 6), power is consumed only in section τ4 as shown in FIG. 3(i). Therefore, as shown in FIG. 3(j), the power amplifier 3 as a whole consumes the power of one power amplifier at any time, and it is not possible to use a dedicated power amplifier for each beam. There is no increase in power consumption.

一般に、衛星中継器には、複数の搬送波を共通増幅する
ことを想定して、直線増幅器を用いることが多い。しか
し、TDMA運用を行う場合には、衛星中継器では1波
のみを増幅すればよいので、非直線増幅器であるC級増
幅器を衛星中継器に用いることができる。一般に非直線
増幅器でPSK波の様なディジタル変調波を増幅した場
合にはピット誤シ特性が劣化するが、C級増幅器ではそ
の劣化は小さい。一方、帯域制限されたPSK波の様な
振幅変調成分を有する信号をC級電力増幅器で増幅する
と、増幅器出力では高いレベルの帯域外輻射が発生する
。第2図の実施例ではこの帯域外輻射を遮断するために
、電力増幅器3と送信アンテナ5の間に帯域通過フィル
タ6を挿入している。
Generally, a linear amplifier is often used in a satellite repeater assuming that a plurality of carrier waves are commonly amplified. However, when performing TDMA operation, the satellite repeater only needs to amplify one wave, so a class C amplifier, which is a nonlinear amplifier, can be used in the satellite repeater. Generally, when a digitally modulated wave such as a PSK wave is amplified with a nonlinear amplifier, the pit error characteristic deteriorates, but in a class C amplifier, the deterioration is small. On the other hand, when a signal having an amplitude modulation component such as a band-limited PSK wave is amplified by a class C power amplifier, a high level of out-of-band radiation occurs at the output of the amplifier. In the embodiment shown in FIG. 2, a bandpass filter 6 is inserted between the power amplifier 3 and the transmitting antenna 5 in order to block this out-of-band radiation.

第2図の実施例に対するこれまでの説明では電力増幅器
aKC級増幅器を想定していたが、C級増幅器の代、j
7[B級増幅器を用いることもできる。
In the previous explanation of the embodiment of FIG. 2, the power amplifier aKC class amplifier was assumed, but instead of a C class amplifier,
7 [Class B amplifiers can also be used.

B級増幅器を用いる場合には信号が入力されていない電
力増幅器においても最大出力時の消費電力の20〜30
%の電源電力が消費されるので、C級電力増幅器を用い
る場合よりは、電力増幅器3全体での電源電力利用効率
は下がる。その反面、信号の伝送特性は、C級電力増幅
器の場合よりも改善される。
When using a class B amplifier, even when no signal is input to the power amplifier, the power consumption at maximum output is 20 to 30% lower.
% of the power supply power is consumed, the power supply efficiency of the power amplifier 3 as a whole is lower than when using a class C power amplifier. On the other hand, the signal transmission characteristics are improved compared to the case of a class C power amplifier.

第4図は、本発明の第2実施例である。本実施例では、
受信アンテナ1、送信アンテナ5のどちらもが複数のビ
ームアンテナから構成される。そして、受信アンテナ1
を構成する各ビームに接続される受信機2と、送信アン
テナ5を構成する各ビームに接続される電力増幅器3の
間に、両者の接続関係を切替えるスイッチマトリックス
7が用意される。第2図の実施例と同様に、電力増幅器
に消費電力が減少する型のものを用いる。
FIG. 4 shows a second embodiment of the invention. In this example,
Both the receiving antenna 1 and the transmitting antenna 5 are composed of a plurality of beam antennas. And receiving antenna 1
A switch matrix 7 is provided between the receiver 2 connected to each beam making up the transmitting antenna 5 and the power amplifier 3 connected to each beam making up the transmitting antenna 5. Similar to the embodiment shown in FIG. 2, a power amplifier of a type that reduces power consumption is used.

第5図は、第4図の実施例における、各受信信号の各送
信ビームアンテナへの分配手順と各電力増幅器で消費さ
れる電力を、横軸に時間tをとって説明している図であ
る。第5図(、)は受信アンテナ1に)、受信機2−に
よって受信される信号、また同図(b)は受信アンテナ
1(ロ)、受信機2(/?)によって受信される信号を
それぞれ示している。また、第5図(c)はスイッチマ
トリックス7よυ電力増幅器5(4)に入力される信号
、同図(d)は電力増幅器5(B)に入力される信号、
同図(、)は電力増幅器S (C)に入力される信号、
同図(f)は電力増幅器5(D)に入力される信号を示
している。さらに、第5口伝)は電力増幅器5(5)の
消費電力、同図(h)は電力増幅器5(B)の消費電力
、同図(i)は電力増幅器(C)の消費電力、同図(j
)は電力増幅器(2)の消費電力、同図(k)は電力増
幅器5全体での消費電力を示す。ただし、電力増幅器に
はC級増幅器を想定している。第5図に示すように、T
DMAフレームは区間τl 、τ2.τ3゜τ4に分割
され、各区間では2つの受信信号がスイッチマトリック
ス7によって適宜選択される2つの電力増幅器5に1波
ずつ入力される。即ち、各区間では、2つの電力増幅器
5に信号が入力されることになシ、第5図(k)に示す
様に、電力増幅器5全体では、どの時間帯も電力増幅器
2個分の電力のみが消費される。
FIG. 5 is a diagram illustrating the distribution procedure of each received signal to each transmitting beam antenna and the power consumed by each power amplifier in the embodiment of FIG. 4, with time t plotted on the horizontal axis. be. Fig. 5(,) shows the signal received by receiving antenna 1) and receiver 2-, and Fig. 5(b) shows the signal received by receiving antenna 1(b) and receiver 2(/?). are shown respectively. In addition, FIG. 5(c) shows a signal input from the switch matrix 7 to the power amplifier 5(4), and FIG. 5(d) shows a signal input to the power amplifier 5(B).
The figure (,) shows the signal input to the power amplifier S (C),
FIG. 5(f) shows a signal input to the power amplifier 5(D). Furthermore, the figure (h) shows the power consumption of the power amplifier 5 (B), and the figure (i) shows the power consumption of the power amplifier (C). (j
) shows the power consumption of the power amplifier (2), and (k) in the figure shows the power consumption of the entire power amplifier 5. However, the power amplifier is assumed to be a class C amplifier. As shown in Figure 5, T
The DMA frame has sections τl, τ2 . The signal is divided into τ3° and τ4, and in each section, two received signals are input one wave at a time to two power amplifiers 5 which are appropriately selected by the switch matrix 7. That is, in each section, no signal is input to two power amplifiers 5, and as shown in FIG. only is consumed.

第6図は、本発明を再生中継器に適用した場合の実施例
を示している。同図中、8は復調器、9は信号処理部、
10は変調器である。同図の実施例では、受信アンテナ
1、受信機2において増幅され周波数変換された信号は
、復調器8によってベースバンド信号に復調され、信号
処理部9へ4久 びかれる。信号処理部9では、タイムスロットク換、多
重化、ビットレイト変換等の信号処理が行われ、その出
力信号は変調器lOにおいて再度変調される。変調器1
0の出力信号は分配スイッチ4に導ひかれ、以後は第2
図の実施例と同様の動作が行われる。
FIG. 6 shows an embodiment in which the present invention is applied to a regenerative repeater. In the figure, 8 is a demodulator, 9 is a signal processing section,
10 is a modulator. In the embodiment shown in the figure, a signal amplified and frequency-converted by the receiving antenna 1 and the receiver 2 is demodulated into a baseband signal by a demodulator 8, and then sent to a signal processing section 9. The signal processing unit 9 performs signal processing such as time slot conversion, multiplexing, and bit rate conversion, and the output signal is modulated again in the modulator 10. Modulator 1
The output signal of 0 is led to the distribution switch 4, and thereafter the second
The same operation as in the illustrated embodiment is performed.

(発明、の効果) 以上述べた様に、本発明によれば、入力信号が零の場合
は電力消費が零となるあるいは減少する型の電力増幅器
を各送信ビームアンテナ毎に専用に用意し、各電力増幅
器の入力側に分配スイッチを設け、これを適当に操作す
ることにより、分配スイッチの高信頼度化が図れると同
時に、通信衛星上で最も大きな電力を消費して発生され
る送信搬送波を有効に利用でき、衛星電力の高能率使用
が図れるという利点が得られる。特に海事衛星通信シス
テムのように、割当周波数帯域幅には余裕がある反面、
衛星電力をできるだけ有効に利用したい通信システムに
本発明を適用すれば、大きな効果を上げることができる
(Effects of the Invention) As described above, according to the present invention, a power amplifier of a type in which the power consumption becomes zero or decreases when the input signal is zero is prepared exclusively for each transmitting beam antenna, By installing a distribution switch on the input side of each power amplifier and operating it appropriately, it is possible to improve the reliability of the distribution switch and at the same time reduce the transmission carrier wave generated by consuming the largest amount of power on a communication satellite. This has the advantage that it can be used effectively and that the satellite power can be used with high efficiency. Particularly in maritime satellite communication systems, there is plenty of allocated frequency bandwidth, but on the other hand,
If the present invention is applied to a communication system in which it is desired to use satellite power as effectively as possible, great effects can be achieved.

なお、前述した実施例、応用例の説明に当っては、説明
の都合主受信アンテナの数は最大2個、送信アンテナの
数は最大4個、フレーム長の分割数も最大4分割とした
が、これらの数が本発明の実施に制限を与えるものでは
ない。まだ、使用する電力増幅器の例としてC級増幅器
とB級増幅器のみを揚げたが、入力信号レベルが零の場
合に電力消費が零となるあるいは減少する型の増幅器で
あれば、本発明に利用可能であることは言うまでもない
In addition, in explaining the above-mentioned embodiments and application examples, for convenience of explanation, the number of main receiving antennas is 2 at most, the number of transmitting antennas is 4 at most, and the number of divisions of the frame length is also divided into 4 at most. , these numbers do not limit the implementation of the present invention. Although only class C amplifiers and class B amplifiers have been mentioned as examples of power amplifiers to be used, any type of amplifier whose power consumption becomes zero or decreases when the input signal level is zero can be used in the present invention. It goes without saying that it is possible.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来の衛星搭載用中継器の構成例を示すブロッ
ク図、第2図は本発明の実施例を示すプロ、り図、第3
図は第2図の実施例の動作を説明するだめのタイムチャ
ート図、第4図(d本発明の他の実施例を示すブロック
図、第5図は第4図の実施例の動作を説明するだめのタ
イムチャート図、第6図は本発明のさらに他の実施例を
示すブロック図である。 1;受信アンテナ、2;受信機、3;電力増幅器、4;
分配スイッチ、5;アンブナ 特許出願人 国際電化電話株式会社 特許出願代理人 弁理士 山 本 恵 − 第1図 第2図 第3図 (( ( ン^ ( (・フ 第4図 7 第5図
FIG. 1 is a block diagram showing an example of the configuration of a conventional satellite-mounted repeater, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG.
The figures are a time chart diagram for explaining the operation of the embodiment shown in FIG. 2, FIG. 4 is a block diagram showing another embodiment of the present invention, and FIG. 6 is a block diagram showing still another embodiment of the present invention. 1; receiving antenna; 2; receiver; 3; power amplifier; 4;
Distribution switch, 5; Ambuna Patent applicant Kokusai Denka Telephone Co., Ltd. Patent agent Megumi Yamamoto - Figure 1 Figure 2 Figure 3

Claims (1)

【特許請求の範囲】[Claims] 入力信号が零の時に電力消費が零となるかあるいは減少
する型の電力増幅器を複数の送信用ビームアンテナのそ
れぞれに1台ずつ専用にもうけ、該電力増幅器の入力と
受信アンテナの出力に接続される受信機の出力の間に分
配スイッチを設け、受信されるバースト信号の宛先ビー
ムに応じて該分配スイッチの接続状態を制御し、全ビー
ム数よりも少ない数の送信用ビームアンテナよシ同時に
バースト信号が送信されることを特徴とする衛星搭載用
中継器。
A power amplifier of a type whose power consumption becomes zero or decreases when the input signal is zero is provided for each of the plurality of transmitting beam antennas, and the power amplifier is connected to the input of the power amplifier and the output of the receiving antenna. A distribution switch is provided between the outputs of the receivers, and the connection state of the distribution switch is controlled according to the destination beam of the received burst signal, so that the burst signal can be simultaneously transmitted from transmitting beam antennas with a smaller number than the total number of beams. A satellite-mounted repeater characterized by transmitting signals.
JP58178245A 1983-09-28 1983-09-28 On-satellite repeator Pending JPS6072337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58178245A JPS6072337A (en) 1983-09-28 1983-09-28 On-satellite repeator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58178245A JPS6072337A (en) 1983-09-28 1983-09-28 On-satellite repeator

Publications (1)

Publication Number Publication Date
JPS6072337A true JPS6072337A (en) 1985-04-24

Family

ID=16045120

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58178245A Pending JPS6072337A (en) 1983-09-28 1983-09-28 On-satellite repeator

Country Status (1)

Country Link
JP (1) JPS6072337A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01246928A (en) * 1988-03-29 1989-10-02 Nec Corp On-satellite repeater for communication
JPH02131035A (en) * 1988-11-10 1990-05-18 Nec Corp Repeater for satellite-mounted communication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01246928A (en) * 1988-03-29 1989-10-02 Nec Corp On-satellite repeater for communication
JPH02131035A (en) * 1988-11-10 1990-05-18 Nec Corp Repeater for satellite-mounted communication

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