JP2558006B2 - Wireless device - Google Patents
Wireless deviceInfo
- Publication number
- JP2558006B2 JP2558006B2 JP2217384A JP21738490A JP2558006B2 JP 2558006 B2 JP2558006 B2 JP 2558006B2 JP 2217384 A JP2217384 A JP 2217384A JP 21738490 A JP21738490 A JP 21738490A JP 2558006 B2 JP2558006 B2 JP 2558006B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- optical
- optical switch
- transponder
- 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
Landscapes
- Optical Communication System (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Radio Relay Systems (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、人工衛星に搭載され地球局との通信及び人
工衛星間の通信に使用可能な無線装置（以下トランスポ
ンダという）に関する。The present invention relates to a wireless device (hereinafter referred to as a transponder) mounted on an artificial satellite and usable for communication with an earth station and communication between artificial satellites.
［従来の技術］ 従来のトランスポンダでは、受信した各周波数信号
は、同一の中間周波数（以下IFと記す）にてなるIF信号
に変換された後、IF帯スイッチに供給され、IF帯スイッ
チで切り換えられた後、各送信機に送出される。各送信
機では、上記IF信号が無線信号に変換され、地球局ある
いは他の衛星に送信されて通信が行なわれる。[Prior Art] In a conventional transponder, each received frequency signal is converted into an IF signal having the same intermediate frequency (hereinafter referred to as IF), and then supplied to an IF band switch and switched by the IF band switch. Then, it is sent to each transmitter. In each transmitter, the IF signal is converted into a radio signal and transmitted to the earth station or another satellite for communication.
［発明が解決しようとする課題］ このような構成では、各受信信号をIF信号に、又、IF
信号を送信信号に変換するための局部発信器がそれぞれ
必要であることより、ｉ）局部発信器の数量が多くな
る、ii）送信できる伝送容量はIF周波数に大きく依存
し、IFスイッチの電気的及び機械的性能によりIF周波数
を高くできず、伝送容量に上限がある、iii）光波が送
受信信号である場合にも送受信それぞれに局部発信器が
必要になり装置構成が複雑になる等のため、適用できる
周波数帯、通信サービス等に限界があるという問題点が
あった。[Problems to be Solved by the Invention] In such a configuration, each received signal is converted into an IF signal, and
Since each local oscillator for converting a signal into a transmission signal is required, i) the number of local oscillators increases, ii) the transmission capacity that can be transmitted depends largely on the IF frequency, and the electrical characteristics of the IF switch Also, because the IF frequency cannot be increased due to mechanical performance and there is an upper limit to the transmission capacity, iii) even when light waves are transmission and reception signals, a local oscillator is required for each transmission and reception, which complicates the device configuration. There is a problem that there are limits to applicable frequency bands and communication services.
本発明はこのような問題点を解決するためになされた
もので、トランスポンダの使用周波数の範囲及び伝送容
量が拡大されたトランスポンダを提供することを目的と
する。The present invention has been made to solve the above problems, and an object of the present invention is to provide a transponder in which the range of operating frequencies of the transponder and the transmission capacity are expanded.
［課題を解決するための手段］ 本発明は、複数の周波数を使用し通信を行うトランス
ポンダにおいて、 それぞれ異なる所定の周波数帯を受信可能な複数の受
信部と、 上記受信部にて受信した信号を光波に変換する変換部
と、 光波をそれぞれ所定の周波数帯の無線周波信号に変換
し送信する複数の送信部と、 上記変換部より供給される光波を制御信号により指示
された上記送信部に伝送する光スイッチと、を備えたこ
とを特徴とする。[Means for Solving the Problems] The present invention provides a transponder that performs communication using a plurality of frequencies, and a plurality of receiving units capable of receiving different predetermined frequency bands and a signal received by the receiving unit. A converter that converts light waves, a plurality of transmitters that convert the light waves into radio frequency signals of a predetermined frequency band, respectively, and transmit the light waves supplied from the converter to the transmitters instructed by a control signal. And an optical switch for switching.
［作用］ 変換部、送信部、及び光スイッチは、光回路にて構成
することができ装置構成の簡易化、小形化等を図るよう
に作用する。又、光スイッチは超広帯域特性を有するこ
とにより、該スイッチを使用することは伝送容量を大き
くするように作用する。[Operation] The conversion unit, the transmission unit, and the optical switch can be configured by an optical circuit, and act so as to simplify the device configuration and reduce the size. Further, since the optical switch has an ultra-wide band characteristic, using the switch acts to increase the transmission capacity.
［実施例］ 本発明のトランスポンダの一実施例を示す第１図にお
いて、アンテナ１ないし３は、地球局あるいは衛星より
送信される各周波数帯の受信信号を受信するアンテナで
ある。尚、上記アンテナは図面には３つしか示していな
いが、実際には分割された周波数帯数に応じた数のアン
テナが存在する。これらのアンテナ１ないし３は、それ
ぞれ高周波増幅器５ないし７に接続され、高周波増幅器
５ないし７は、電気信号を光信号に変換する電気光変換
回路８ないし10にそれぞれ接続され、電気光変換回路８
ないし10は、光スイッチ11に接続される。[Embodiment] In FIG. 1 showing an embodiment of the transponder of the present invention, antennas 1 to 3 are antennas for receiving received signals of respective frequency bands transmitted from an earth station or a satellite. Although only three antennas are shown in the drawing, there are actually as many antennas as the number of divided frequency bands. These antennas 1 to 3 are connected to high-frequency amplifiers 5 to 7, respectively, and the high-frequency amplifiers 5 to 7 are connected to electro-optical conversion circuits 8 to 10 for converting electric signals into optical signals, respectively.
Through 10 are connected to the optical switch 11.
又、地球局あるいは衛星から送信される制御情報信号
を受信するアンテナ４は、高周波増幅器33に接続され、
高周波増幅器33は変復調器34に接続され、変復調器34は
上記光スイッチ11及び高周波増幅器35に接続される。The antenna 4 for receiving the control information signal transmitted from the earth station or satellite is connected to the high frequency amplifier 33,
The high frequency amplifier 33 is connected to the modulator / demodulator 34, and the modulator / demodulator 34 is connected to the optical switch 11 and the high frequency amplifier 35.
光スイッチ11は、電気光変換回路８ないし10より供給
される複数の光信号について、制御情報信号28が変復調
器34にて復調された制御情報信号の指示によりスイッチ
ングを行い所望の方向に相当する送信器に光波信号を伝
送するスイッチである。The optical switch 11 switches a plurality of optical signals supplied from the electro-optical conversion circuits 8 to 10 in accordance with an instruction of the control information signal demodulated by the modulator / demodulator 34 and corresponds to a desired direction. It is a switch that transmits a lightwave signal to a transmitter.
光スイッチ11の出力側は、各方向に相当するアンテナ
21ないし23より送信される信号を作成するため、まず周
波数変換器12,14,16に接続される。尚、送信用アンテナ
は３つしか図示していないが、実際にはこれ以上のアン
テナが設けられており周波数変換器12等もこれと同数設
けられる。それぞれの周波数変換器12,14,16には、局部
発信器用レーザ13,15,17が接続され、周波数変換器12,1
4,16は光スイッチ11が送出する光波信号を周波数変換し
無線周波数信号を作成する。The output side of the optical switch 11 is an antenna corresponding to each direction.
To create the signals transmitted by 21 to 23, they are first connected to frequency converters 12, 14, 16. Although only three transmitting antennas are shown, more antennas are actually provided, and the same number of frequency converters 12 and the like are provided. The local converter lasers 13, 15, 17 are connected to the respective frequency converters 12, 14, 16 and the frequency converters 12, 1, 16 are connected.
Reference numerals 4 and 16 frequency-convert the light wave signal sent from the optical switch 11 to create a radio frequency signal.
周波数変換器12,14,16は、所定レベルまで信号増幅を
行う高周波増幅器18ないし20に接続され、高周波増幅器
18ないし20は上記アンテナ21ないし23に接続される。The frequency converters 12, 14, 16 are connected to high-frequency amplifiers 18 to 20 for amplifying signals up to a predetermined level, and
18 to 20 are connected to the antennas 21 to 23.
又、上述した高周波増幅器35は、アンテナ24に接続さ
れる。The high frequency amplifier 35 described above is connected to the antenna 24.
このように構成されるトランスポンダの動作を以下に
説明する。The operation of the transponder thus configured will be described below.
地球局あるいは衛星より送信された各周波数帯の受信
信号25ないし27は、各周波数帯に相当するアンテナ１な
いし３にて受信され、それぞれの高周波増幅器５ないし
７にて信号が増幅された後、電気光変換回路８ないし10
にて光波信号に変換され、光スイッチ11に供給される。Received signals 25 to 27 of each frequency band transmitted from the earth station or satellite are received by antennas 1 to 3 corresponding to each frequency band and amplified by respective high frequency amplifiers 5 to 7, Electro-optical conversion circuit 8 to 10
Is converted into a light wave signal and supplied to the optical switch 11.
光スイッチ11では、基地局より送信されアンテナ４に
て受信され変復調器34にて復調された制御情報信号によ
って、上記光波信号が選択され、選択された光信号は所
望の方向に相当する送信器に属する周波数変換器12,14,
16の少なくとも一つに伝送される。周波数変換器12,14,
16と局部発信器用レーザ13,15,17とにおいて、供給され
た光波信号の周波数変換を行い無線周波数信号を作成す
る。この無線周波数信号は、高周波増幅器18ないし20に
て所定レベルまで増幅された後、アンテナ21ないし23を
介して送信される。In the optical switch 11, the lightwave signal is selected by the control information signal transmitted from the base station, received by the antenna 4 and demodulated by the modulator / demodulator 34, and the selected lightwave signal corresponds to the desired direction. Frequency converters belonging to
Is transmitted to at least one of the sixteen. Frequency converter 12,14,
The supplied lightwave signal is frequency-converted in 16 and the local oscillator lasers 13, 15, 17 to create a radio frequency signal. This radio frequency signal is amplified to a predetermined level by the high frequency amplifiers 18 to 20 and then transmitted via the antennas 21 to 23.
このようなトランスポンダは、光スイッチ11が信号帯
域に対して超広帯域特性を有するので、変調された信号
を高速でスイッチング動作することが可能であり、１無
線周波数信号で広帯域信号を伝送できる利点がある。
又、電気光変換回路８ないし10、光スイッチ11、周波数
変換器12,14,16の構成部分についてはすべて光回路にて
構成されるので、装置構成の簡易化、小形化、軽量化が
可能であり、衛星搭載用のトランスポンダとして適して
いる。In such a transponder, since the optical switch 11 has an ultra-wide band characteristic with respect to the signal band, it is possible to perform a switching operation on the modulated signal at a high speed, and there is an advantage that the wide band signal can be transmitted by one radio frequency signal. is there.
In addition, since the components of the electro-optical conversion circuits 8 to 10, the optical switch 11, and the frequency converters 12, 14, 16 are all configured by optical circuits, the device configuration can be simplified, downsized, and lightened. And is suitable as a transponder for mounting on a satellite.
本発明の他の実施例を示す第２図において、第１図と
同じ構成部分については同じ符号を付し、その説明を省
略する。In FIG. 2 showing another embodiment of the present invention, the same components as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.
例えば衛星より送信され、光レンズ36、37にて集光さ
れた光波信号が供給され該光波信号の波長を変換する波
長変換器38、39は光スチッチ11に接続される。尚、光レ
ンズ36、光増幅器38等は、２組しか図示されていない
が、実際にはこれ以上の複数組が設けられる。For example, the wavelength converters 38 and 39 which are supplied with the light wave signals transmitted from the satellite and condensed by the optical lenses 36 and 37 and which convert the wavelengths of the light wave signals are connected to the optical switch 11. Although only two sets of the optical lens 36, the optical amplifier 38 and the like are shown, a plurality of sets more than this are actually provided.
光スイッチ11の幾つかの出力側は、光スイッチ11より
送出される光波信号を波長変換する波長変換器40、41に
接続される。波長変換器40、41より送出される光波信号
は、光レンズ42、43を介して他の例えば衛星に送出され
る。尚、波長変換器40、光レンズ42等は、２組しか図示
されていないが、実際にはこれ以上の組が設けられる。
このように構成されるトランスポンダの動作は上述した
トランスポンダと同様であるが、本トランスポンダにて
対応可能な無線信号は、マイクロ波からミリ波、さらに
光波まで含めることができる。Some output sides of the optical switch 11 are connected to wavelength converters 40 and 41 that perform wavelength conversion on the lightwave signal sent from the optical switch 11. The lightwave signals sent from the wavelength converters 40 and 41 are sent to other satellites, for example, via the optical lenses 42 and 43. Although only two sets of the wavelength converter 40 and the optical lens 42 are shown in the figure, more sets are actually provided.
The operation of the transponder configured in this way is the same as that of the above-described transponder, but the radio signals compatible with this transponder can include microwaves, millimeter waves, and even light waves.
例えば供給される信号が光波以外であれば、アンテナ
１等にて受信され、光波であれば光レンズ36等にて受信
され、所定の変換処理がされたそれぞれの信号は、光ス
イッチ11に供給される。そして光スイッチ11では、上述
したように基地局より供給された制御情報信号によって
指示されたスイッチングが行なわれる。例えば、制御情
報信号の指示により周波数変換器12等に接続された場合
には、アンテナ21より無線信号が送信される。一方、波
長変換器40等に接続された場合には、光レンズ42等より
光波信号が送信される。For example, if the supplied signal is other than a light wave, it is received by the antenna 1 or the like, and if it is a light wave, it is received by the optical lens 36 or the like, and each signal subjected to predetermined conversion processing is supplied to the optical switch 11. To be done. Then, the optical switch 11 performs the switching instructed by the control information signal supplied from the base station as described above. For example, when connected to the frequency converter 12 or the like according to the instruction of the control information signal, a wireless signal is transmitted from the antenna 21. On the other hand, when connected to the wavelength converter 40 or the like, the light wave signal is transmitted from the optical lens 42 or the like.
一般的に、地球局と衛星との交信は無線周波信号にて
行なわれ、衛星間どうしの交信は光波にて行なわれる場
合が多い。本実施例のトランスポンダでは無線、光波を
使用して一つの光スイッチ11にて地球局の複数の局、複
数の衛星を接続できる利点がある。In general, the communication between the earth station and the satellite is performed by a radio frequency signal, and the communication between the satellites is often performed by a light wave. The transponder of this embodiment has an advantage that a plurality of earth stations and a plurality of satellites can be connected by one optical switch 11 by using radio waves and light waves.
又、マイクロ波、ミリ波から光波に至る周波数領域を
一つの光スイッチ11にて処理することができるので、装
置の大幅な簡略化が可能となる効果がある。又、このよ
うな簡易な構成で伝送容量を大きくできるとともに、複
数の地球局、さらに複数の衛星とを接続できるので、衛
星を使用したシステムの適用領域の拡大を図ることがで
きる。Further, since the frequency range from microwaves, millimeter waves to light waves can be processed by one optical switch 11, there is an effect that the apparatus can be greatly simplified. Further, since the transmission capacity can be increased with such a simple configuration and a plurality of earth stations and a plurality of satellites can be connected, the application area of the system using the satellites can be expanded.
［発明の効果］ 以上詳述したように本発明によれば、超広帯域特性を
有する光スイッチを備えたことより、トランスポンダの
使用周波数の範囲及び伝送容量を拡大することができ、
又、変換部、送信部及び上記光スイッチを光回路にて構
成したことより、トランスポンダの装置構成の簡易化、
小形化等を可能とすることができる。[Effects of the Invention] As described in detail above, according to the present invention, since the optical switch having the ultra-wide band characteristic is provided, it is possible to expand the range of the operating frequency and the transmission capacity of the transponder,
Further, since the conversion unit, the transmission unit, and the optical switch are configured by an optical circuit, simplification of the device configuration of the transponder,
It can be miniaturized.
第１図は本発明のトランスポンダの一実施例における構
成を示すブロック図、第２図は本発明のトランスポンダ
の他の実施例における構成を示すブロック図である。 １ないし４……アンテナ、 ８ないし10……電気光変換回路、 11……光スイッチ、 12,14,16……周波数変換器、 21ないし24……アンテナ、34……変復調器、 36,37……光レンズ、 38ないし41……波長変換器、 42,43……光レンズ。FIG. 1 is a block diagram showing a configuration in one embodiment of the transponder of the present invention, and FIG. 2 is a block diagram showing a configuration in another embodiment of the transponder of the present invention. 1 to 4 ... Antenna, 8 to 10 ... Electro-optical conversion circuit, 11 ... Optical switch, 12,14, 16 ... Frequency converter, 21 to 24 ... Antenna, 34 ... Modulator / demodulator, 36, 37 ...... Optical lens, 38 to 41 …… Wavelength converter, 42,43 …… Optical lens.
Claims (2)
において、 それぞれ異なる所定の周波数帯を受信可能な複数の受信
部と、 上記受信部にて受信した信号を光波に変換する変換部
と、 光波をそれぞれ所定の周波数帯の無線周波信号に変換し
送信する複数の送信部と、 上記変換部より供給される光波を制御信号により指示さ
れた上記送信部に伝送する光スイッチと、を備えたこと
を特徴とする無線装置。1. A radio apparatus for communicating using a plurality of frequencies, comprising: a plurality of receiving sections capable of receiving different predetermined frequency bands; and a converting section for converting a signal received by the receiving section into a light wave. A plurality of transmitters for converting the light waves into radio frequency signals each having a predetermined frequency band and transmitting the radio waves, and an optical switch for transmitting the light waves supplied from the converter to the transmitters instructed by a control signal. A wireless device characterized by the above.
及び送信部を備えた、請求項１記載の無線装置。2. The wireless device according to claim 1, further comprising a receiving unit for directly receiving the light wave and transmitting the light wave, and a transmitting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2217384A JP2558006B2 (en) | 1990-08-17 | 1990-08-17 | Wireless device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2217384A JP2558006B2 (en) | 1990-08-17 | 1990-08-17 | Wireless device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04100328A JPH04100328A (en) | 1992-04-02 |
| JP2558006B2 true JP2558006B2 (en) | 1996-11-27 |
Family
ID=16703333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2217384A Expired - Fee Related JP2558006B2 (en) | 1990-08-17 | 1990-08-17 | Wireless device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2558006B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170048427A (en) * | 2014-08-26 | 2017-05-08 | 레이데온 컴퍼니 | Electro-optical payload for high-bandwidth free space optical communications |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100547880B1 (en) * | 2003-05-20 | 2006-01-31 | 삼성전자주식회사 | Indoor Short-range Communication Network System Using Ultra-Wideband Communication System |
| US8953946B2 (en) * | 2012-07-13 | 2015-02-10 | Raytheon Company | High-bandwidth optical communications relay payload |
-
1990
- 1990-08-17 JP JP2217384A patent/JP2558006B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170048427A (en) * | 2014-08-26 | 2017-05-08 | 레이데온 컴퍼니 | Electro-optical payload for high-bandwidth free space optical communications |
| KR101976549B1 (en) * | 2014-08-26 | 2019-05-09 | 레이데온 컴퍼니 | Electro-optical payload for high-bandwidth free space optical communications |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04100328A (en) | 1992-04-02 |
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