JPS60117831A - Optical space transmitter - Google Patents
Optical space transmitterInfo
- Publication number
- JPS60117831A JPS60117831A JP58224734A JP22473483A JPS60117831A JP S60117831 A JPS60117831 A JP S60117831A JP 58224734 A JP58224734 A JP 58224734A JP 22473483 A JP22473483 A JP 22473483A JP S60117831 A JPS60117831 A JP S60117831A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- amplifier
- transmission
- mixer
- 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
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はローカルエリアネットワークや工場内の伝送線
路を敷設するのが難しい場所でもワイヤレスでデータ伝
送を全二重で実現できる光空間伝送装置に関するもので
ある。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an optical space transmission device that can realize wireless data transmission in full duplex even in places where it is difficult to lay transmission lines such as local area networks or factories. be.
従来例の構成とその問題点
光空間伝送装置として従来いくつかの提案や、商品化の
例もあるが、データの伝送形態として送信と受信を同時
に行う全二重伝送方式は、自分で送信した信号が周囲の
物体で反射されて本来受信すべき信号に混入して来て誤
信号となることから、十分な特性は得られていない。こ
れの対策として伝送に使う元の波長を送信と受信で異な
るものにする方法１元の波長は同じでデータを変調する
電気信号の周波数を送信と受信で異なるものにするなど
の方法があるが、送信と受信の分離が十分とは言えない
。Conventional configuration and problems There have been several proposals and examples of commercialization of optical space transmission devices, but the full-duplex transmission method, which simultaneously transmits and receives data, is Sufficient characteristics cannot be obtained because the signal is reflected by surrounding objects and mixed into the signal that should have been received, resulting in an erroneous signal. As a countermeasure to this, there are methods such as making the original wavelength used for transmission different for sending and receiving.1 The original wavelength is the same, but the frequency of the electrical signal that modulates the data is made different for sending and receiving. , the separation of transmission and reception is not sufficient.
発明の目的
本発明は上記のような点に鑑みてなされたものでζ元の
波長は送信と受信で同じものを使用し、電気変調周波数
を送信と受信で異なる周波数を利用し、データ伝送を送
、受面時にしかも誤まりの少ない伝送を実現する光空間
伝送装置を提供しようとするものである。Purpose of the Invention The present invention has been made in view of the above points, and it is possible to transmit data by using the same wavelength of the ζ source for transmission and reception, and using different electrical modulation frequencies for transmission and reception. The present invention aims to provide an optical space transmission device that realizes transmission with fewer errors during transmission and reception.
発明の構成
この目的を達成するために本発明の光空間伝送装置にお
いては、データを変調する変調器、上記変調器からの信
号を増幅する第１の増幅器、上記第１の増幅器からの信
号を光信号に変換する発光素子で送信部を構成し、かつ
光信号を受光して電気信号に変換する受光素子、上記受
光素子からの信号を増幅する第２の増幅器、上記第２の
増幅器からの信号を復調してデータを得る復調器、上記
送信器を構成する第１の増幅器の出力信号の一部を移相
器、利得制御器を通して、上記受光素子からの信号を増
幅する第２の増幅器の出力信号と混合する混合器で受信
部を構成し、上記送信部からの混入成分を上記受信部で
除去するように構成したことを特徴とするものである。Structure of the Invention In order to achieve this object, the optical space transmission device of the present invention includes a modulator that modulates data, a first amplifier that amplifies the signal from the modulator, and a signal from the first amplifier. A transmitter includes a light-emitting element that converts into an optical signal, a light-receiving element that receives the optical signal and converts it into an electrical signal, a second amplifier that amplifies the signal from the light-receiving element, and a second amplifier that amplifies the signal from the second amplifier. a demodulator that demodulates the signal to obtain data; a second amplifier that amplifies the signal from the light receiving element by passing a part of the output signal of the first amplifier constituting the transmitter through a phase shifter and a gain controller; The receiver is configured to include a mixer that mixes the output signal from the transmitter, and the receiver removes mixed components from the transmitter.
実施例の説明 以下、図面を参照しながら本発明を説明する。Description of examples The present invention will be described below with reference to the drawings.
図は本発明の光空間伝送装置の概略構成図を示示し、図
中の１はデータのＰ Ｓ Ｋ （Ｐｈａｓｅ−８ｈｉｆ
ｔＫｅｙｉｎｇ）、 Ｆ Ｓ Ｋ （Ｆｒｅｑｕｅｎｃ
ｙ−８ｈｉｆｔ Ｋｅｙｉｎｇ）などの変調器、２は増
幅器、３はＬＥＤなどの発光素子、４はＰＩＮ−ＰＤな
どの受光素子、５は増幅器、６は混合器、７ばＰＳＫ、
ＦＳＫなどの復調器、８は移相器、９はオｌｊ侍制御器
、１０はフィルタ、１１はレベル検出器、１２は送信デ
ータ入力端子、１３は受信データ出力端子である。The figure shows a schematic configuration diagram of the optical space transmission device of the present invention, and 1 in the figure indicates the data PSK (Phase-8hif
tKeying), F S K (Frequenc
2 is an amplifier, 3 is a light emitting element such as an LED, 4 is a light receiving element such as a PIN-PD, 5 is an amplifier, 6 is a mixer, 7 is a PSK,
A demodulator such as FSK, 8 a phase shifter, 9 an optical controller, 10 a filter, 11 a level detector, 12 a transmission data input terminal, and 13 a reception data output terminal.
この第１図に示す本発明の一実施例である光空間伝送装
置について詳細に説明する。The optical space transmission device, which is an embodiment of the present invention shown in FIG. 1, will be described in detail.
図において、送信データは入力端子１２より変調器２に
供給されると、この変調器２である搬送５： 周波数（
ここではｆｌとする）全便〕てＰＳＫまたはＦＳＫなど
の変調を行い、次段の増幅器２に変調された信号を供給
し、増幅器２で増幅され、発光素子３を駆動して空間へ
光信号を発射する。これらの１２．１．２．３で構成さ
れる部分が送信部であり、発光素子３からの光信号は周
波数ｆ１の搬送波変調信号である。In the figure, when transmission data is supplied to a modulator 2 from an input terminal 12, a carrier 5 of this modulator 2: a frequency (
Here, it is referred to as fl), performs modulation such as PSK or FSK, supplies the modulated signal to the next stage amplifier 2, is amplified by the amplifier 2, drives the light emitting element 3, and transmits the optical signal into space. fire. The part composed of these 12.1.2.3 is a transmitter, and the optical signal from the light emitting element 3 is a carrier wave modulation signal of frequency f1.
一方、対抗する光空間伝送装置から発信された光信号は
上記送信部の搬送波周波数ｆ１と異なる周波数（ここで
は１２とする）の搬送波変調、信号に設定する。そこで
、ｆ２の搬送波変調信号は受光素子４で電気信号に変換
され、増幅器５で増幅されたのち、混合器６を経て復調
器７に供給され、原データ信号に復調される。従来の構
成では４，５゜６．７．１３で受信部を構成することで
、上述の送信部と合せて光空間伝送装置が実現するが、
この構成では送信部からの光信号が近くの物体で反射さ
れて受信部に混入し、搬送波周波数をｆｌ、ｆ２と異な
る周波数に設定しても完全な分離が難しく針車が増大し
てし址う。On the other hand, the optical signal transmitted from the opposing optical space transmission device is set to a carrier wave modulation signal having a frequency different from the carrier wave frequency f1 of the transmitter (here, 12). Therefore, the f2 carrier wave modulation signal is converted into an electric signal by the light receiving element 4, amplified by the amplifier 5, and then supplied to the demodulator 7 via the mixer 6, where it is demodulated into the original data signal. In the conventional configuration, by configuring the receiving section with 4.5°6.7.13, an optical space transmission device is realized in conjunction with the above-mentioned transmitting section.
In this configuration, the optical signal from the transmitter is reflected by a nearby object and mixed into the receiver, and even if the carrier frequency is set to different frequencies for fl and f2, complete separation is difficult and the number of needle wheels increases. cormorant.
そこで、本発明では送信部の増幅器２からの信号を移相
器８を通して利得制御器９に供給し、混合器６に供給す
る。一方、混合器６の出力の一部を周波数ｆ１を通過さ
せるフィルタ１０を経てレベル検出器１１［供給し、レ
ベル検出器１１で周波数ｆ１の信号レベルを検出し、検
出−したのち利得制例器９．移相器８の制御信号として
供給する。このような構成とすることで、周波数ｆ１の
搬送波変調信号の位相と振幅を移相器８．利得制御器９
で調整し、混合器６に供給する。この混合器６には増幅
器６からの信号が供給されるが、この信号には本来受信
すべき周波数ｆ２の搬送波変調信号に不要信号である周
波数１１の搬送波変調信号も混入している。そこで、利
得制御器？からの信号を、増幅器５からの不要信号であ
る周波数１１の搬送波変調信号と同じ振幅で１８００位
相の異なる信号に調整して混合器６に供給し、周波数ｆ
１の搬送波変調信号成分を除去する。そして、この除去
全自動的に行うためフィルタ１δで周波数ｆ１の信号を
選択し、これのレベルをレベル検出器１１て検出し、こ
のレベルが最小となるように利得制御器９．移相器８へ
制御信号全供給するようにした構成である。Therefore, in the present invention, the signal from the amplifier 2 of the transmitting section is supplied to the gain controller 9 through the phase shifter 8, and then to the mixer 6. On the other hand, a part of the output of the mixer 6 is supplied to a level detector 11 through a filter 10 that passes the frequency f1, and the level detector 11 detects the signal level of the frequency f1. 9. It is supplied as a control signal for the phase shifter 8. With such a configuration, the phase and amplitude of the carrier modulation signal of frequency f1 are shifted by phase shifter 8. Gain controller 9
and then supplied to the mixer 6. This mixer 6 is supplied with a signal from the amplifier 6, but this signal contains a carrier modulated signal of frequency f2 that should originally be received and a carrier modulated signal of frequency 11, which is an unnecessary signal. So, a gain controller? The signal from the amplifier 5 is adjusted to a signal having the same amplitude and a phase difference of 1800 as the carrier modulation signal of frequency 11, which is an unnecessary signal from the amplifier 5, and is supplied to the mixer 6.
1 carrier modulation signal component is removed. In order to perform this removal completely automatically, a signal of frequency f1 is selected by filter 1δ, its level is detected by level detector 11, and gain controller 9. This configuration is such that all control signals are supplied to the phase shifter 8.
発明の効果
本発明の光空間伝送装置は実施例で説明したように、送
信側の信号の受信側への混入の除去回路ケ設けることに
より、データの送、受信が同時に行える全二重伝送が実
現でき、ロー力ルエリアネソトワーク等の構築が容易に
実現する。Effects of the Invention As explained in the embodiments, the optical space transmission device of the present invention is capable of full-duplex transmission in which data can be sent and received at the same time by providing a circuit for removing the contamination of signals from the transmitting side to the receiving side. It can be realized easily, and the construction of a low-power Luerianesot work etc. can be realized easily.
図は不発明による光空間伝送装置の一実施例を示す概略
構成図である。
１・・・・復調器、２・・・・第１の増幅器、３・・・
・全元素子、４・・・・・受光素子、５・・・・第２の
増幅器、６・・・・・混合器、７・・・・・・復調器、
８・・・・・移相器、９・・・・・利得制御器、１１・
・・・・レベル検出器。The figure is a schematic configuration diagram showing an embodiment of an optical space transmission device according to the invention. 1... Demodulator, 2... First amplifier, 3...
・All elements, 4... Light receiving element, 5... Second amplifier, 6... Mixer, 7... Demodulator,
8... Phase shifter, 9... Gain controller, 11...
...Level detector.
Claims (1)
する第１の増幅器、上記第１の増幅器か−らの信号を光
信号に変換する発光素子で送信部を構成し、かつ光信号
を受光して電気信号に変換する受光素子、上記受光素子
からの信号を増幅する第２の増幅器、上記第２の増幅器
からの信号を復調してデータを得る復調器、上記送信部
を構成する第１の増幅器の出力信号の一部を移相器、利
得制御器を通して、上記受光素子からの信号を増幅する
第２の増幅器の出力信号と混合する混合器で受信部全構
成し、上記送信部からの光信号の混入成分を上記受信部
で除去するように構成したことを特徴とする光空間伝送
装置。A transmitter includes a modulator that modulates data, a first amplifier that amplifies the signal from the modulator, and a light emitting element that converts the signal from the first amplifier into an optical signal. a light-receiving element that receives light and converts it into an electrical signal, a second amplifier that amplifies the signal from the light-receiving element, a demodulator that demodulates the signal from the second amplifier to obtain data, and the transmitter. The entire receiving section consists of a mixer that passes a part of the output signal of the first amplifier through a phase shifter and a gain controller, and mixes it with the output signal of the second amplifier that amplifies the signal from the light receiving element. 1. An optical space transmission device characterized in that the receiving section removes a mixed component of an optical signal from the receiving section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58224734A JPS60117831A (en) | 1983-11-29 | 1983-11-29 | Optical space transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58224734A JPS60117831A (en) | 1983-11-29 | 1983-11-29 | Optical space transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60117831A true JPS60117831A (en) | 1985-06-25 |
Family
ID=16818401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58224734A Pending JPS60117831A (en) | 1983-11-29 | 1983-11-29 | Optical space transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60117831A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63300638A (en) * | 1987-05-29 | 1988-12-07 | Hokuyo Automatic Co | Full duplex data transmitter |
| JPH02299330A (en) * | 1989-03-20 | 1990-12-11 | Hm Electron Inc | Light wavelength communication equipment and method for utilizing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58114195A (en) * | 1981-12-26 | 1983-07-07 | 株式会社フジクラ | Bidirectional light transmitter between rotor and stator |
-
1983
- 1983-11-29 JP JP58224734A patent/JPS60117831A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58114195A (en) * | 1981-12-26 | 1983-07-07 | 株式会社フジクラ | Bidirectional light transmitter between rotor and stator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63300638A (en) * | 1987-05-29 | 1988-12-07 | Hokuyo Automatic Co | Full duplex data transmitter |
| JPH02299330A (en) * | 1989-03-20 | 1990-12-11 | Hm Electron Inc | Light wavelength communication equipment and method for utilizing the same |
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