JPS58115944A - Ground transmitter and receiver of inductive radio - Google Patents
Ground transmitter and receiver of inductive radioInfo
- Publication number
- JPS58115944A JPS58115944A JP56211426A JP21142681A JPS58115944A JP S58115944 A JPS58115944 A JP S58115944A JP 56211426 A JP56211426 A JP 56211426A JP 21142681 A JP21142681 A JP 21142681A JP S58115944 A JPS58115944 A JP S58115944A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission
- amplifier
- power amplifier
- input terminal
- 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
- 230000001939 inductive effect Effects 0.000 title abstract 4
- 230000005540 biological transmission Effects 0.000 abstract description 21
- 230000010354 integration Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、誘導無線伝送方式における地上側の送信信
号の受信側への回り込みをなくする誘導無線地上側送受
信装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a guided radio ground-side transmitter/receiver that eliminates the loopback of ground-side transmitted signals to the receiving side in a guided radio transmission system.
従来、６導無線伝達に用いられてきた同時送受信方式と
して、ハイブリッドトランス方式が知られている。これ
はハイブリッドトランスを方向性結合器として用いたも
のであるが、平衡回路のインピーダンスが伝送線路のイ
ンピーダンスに整合しない場合は、方向性結合能力が低
下するという欠点があり、又ハイブリッドトランス方式
はトランスを使用するために、回路の集積化が固唾であ
るという欠点があった。A hybrid transformer system is known as a simultaneous transmission and reception system that has been conventionally used for six-conductor wireless transmission. This uses a hybrid transformer as a directional coupler, but if the impedance of the balanced circuit does not match the impedance of the transmission line, the directional coupling ability decreases. However, there was a drawback in that it was difficult to integrate the circuits.
本発明は、−Ｆ記した従来のものの欠点を除去するため
になされたものであり、誘導線に平行ＴＶフィーダ線を
使用し、かつ誘導線からの受信信号から送信信号を減算
することにより、前記の回り込みをなくり、回路が簡単
でかつ集積化の可能な誘導無線地上側送受信装置を提供
することを目的としている。The present invention was made in order to eliminate the drawbacks of the conventional ones noted -F, and by using a parallel TV feeder line as the guide wire and subtracting the transmitted signal from the received signal from the guide wire, It is an object of the present invention to provide a guided radio ground-side transmitter/receiver that eliminates the above-mentioned wraparound, has a simple circuit, and can be integrated.
以下に、この発明の一実施例を図について詳細に説明す
る。図において、１けシリアル送信データを印加する送
信入力端子、２は該送信入力端子１に印加されたシリア
ル送信データをＦＳＫ（Ｆｒｅｑｕｅｎｃｙ ５ｉｆｔ
Ｋｅｙｉｎｇ ）変調するＦＳＫ変、−Ｊｒ６回路、
３はＦＳＫ変調された信号を電力増１隔する電力増１１
１Ｍ器、４は該電力増幅器の出力と訴導無線路に直列に
接続された固定抵抗、５は双方向誘導線路の平行ＴＶフ
ィーダ線、６は該平行ＴＶフィーダ國の終ＶＭに接続さ
れた終端抵抗、７け送信信号と誘導線路からの受信信号
を２倍に増幅する被反転増幅器、８け該被反転増幅器の
信号から、上記遣方増幅器３の送イコ信号を減算して送
信信号のみをキャンセルし、受信信号を増幅する減算器
、９け該減算器の出力した受信信号をＦＳＫ復調してシ
リアルデータを再現するＦＳＸ復調回路、１０け該ＦＳ
Ｋ復調回路のシリアルデータを出力する出力端子である
。An embodiment of the present invention will be described in detail below with reference to the drawings. In the figure, 1-digit serial transmission data is applied to a transmission input terminal, and 2 is a transmission input terminal that applies serial transmission data applied to the transmission input terminal 1 to FSK (Frequency 5ft).
Keying) FSK modulation, -Jr6 circuit,
3 is a power increase of 11 that increases the FSK modulated signal by 1 power increase.
1M unit, 4 is a fixed resistor connected in series with the output of the power amplifier and the appeal radio line, 5 is the parallel TV feeder line of the bidirectional induction line, and 6 is connected to the terminal VM of the parallel TV feeder country. Termination resistor, 7-digit inverting amplifier that doubles the received signal from the guiding line, and 8-digit inverting amplifier subtract the equal signal sent by the above-mentioned amplifier 3 to generate only the transmitting signal. a subtracter that cancels the received signal and amplifies the received signal, an FSX demodulation circuit that demodulates the received signal output from the 9-digit subtracter to FSK and reproduces serial data, and a 10-digit FS
This is an output terminal that outputs serial data of the K demodulation circuit.
次に、上記実施例の動作について説明する。上記の送信
入力端子１に印加されたシリアル送信データはＦＳＸ変
調回路２でＦ Ｓ Ｋ変調され、電力増幅器３で電力増
幅される。該電力増幅器で増幅された信号は、固定抵抗
４を介してＴＶフィーダ線（伝送１ｇ４路）５に出力さ
れる。ここで、被反転増幅器７の入力端には、送信信号
が固定抵抗４と終端抵抗６に、より分圧された信号、即
ち４力増幅器３の送信信号の２分の１の信号と、銹導線
路に受信した受信信号との重・冴された信号が印加され
１ ている。上記被反転増幅器７により、上記の重
畳した信号を２倍に増幅して次段の減ｎ器８で′電力増
幅器３の送信信号のみを減算することにより、減算器８
の出力端には、送信信号のキャンセルされた受信信号の
みが出力される。Next, the operation of the above embodiment will be explained. The serial transmission data applied to the transmission input terminal 1 is subjected to FSK modulation by the FSX modulation circuit 2 and power amplified by the power amplifier 3. The signal amplified by the power amplifier is outputted to a TV feeder line (transmission 1g 4 lines) 5 via a fixed resistor 4. Here, at the input terminal of the inverting amplifier 7, a signal whose voltage is divided by the fixed resistor 4 and the terminating resistor 6, that is, a signal that is one-half of the transmitting signal of the four-power amplifier 3, and a A signal that is a combination of the received signal and the received signal is applied to the conductor line. The inverted amplifier 7 amplifies the superimposed signal twice, and the subtracter 8 in the next stage subtracts only the transmission signal from the power amplifier 3.
Only the received signal from which the transmitted signal has been canceled is output to the output end of the transmitter.
尚、−Ｆ記実１．也例では、被反転増幅器７と減算器８
とを用いたが、被反転増幅器７の代りに反転増幅器を用
いて極性を反転させ、かつ減算器８の代りに加ｎ′ａを
用いて加算しても同様の効果が得られる。In addition, -F notes 1. In this example, the inverting amplifier 7 and the subtractor 8
However, the same effect can be obtained by using an inverting amplifier instead of the inverting amplifier 7 to invert the polarity, and using the addition n'a instead of the subtractor 8 for addition.
この発明は叙上の如く、読導巌路に平行フィーダ線を使
用して送信信号を簡単な回路構成によりキャンセルでき
るため、回路の集信化は勿−のこと、装置が安価になる
等の効果を奏するものである。As mentioned above, this invention uses a parallel feeder line in the reading channel and can cancel the transmitted signal with a simple circuit configuration, which not only allows for concentrating the circuit but also reduces the cost of the device. It is effective.
図は本発明の一実１布例を示すブロック線図である。
２・・・ＦＳＸ変調回路、６・・・電力増幅器、４・・
・固定抵抗、５・・・ＴＶフィーダ線、６・・・終端抵
抗、７ ・・・・被反転増幅器、８・・・減算器、
９・・・ＦＳＸ復調回路。
代理人 葛 野 信 −The figure is a block diagram showing one example of the fabric of the present invention. 2...FSX modulation circuit, 6...power amplifier, 4...
・Fixed resistor, 5...TV feeder line, 6...Terminal resistor, 7...Inverted amplifier, 8...Subtractor,
9...FSX demodulation circuit. Agent Shin Kuzuno −
Claims (1)
送受信装置において、送信信号を誘導線より受信する受
信信号より減算して、送信信号が受信側へ回り込むのを
防ぐ減算手段を用いたことを特徴とするル）導無腺地−
ト側送受信装置。A ground-side transmitter/receiver using a constant impedance guide wire in guided radio, characterized in that a subtraction means is used to subtract a transmitted signal from a received signal received from the guide wire to prevent the transmitted signal from going around to the receiving side. ) Conductive ground -
side transmitting/receiving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56211426A JPS58115944A (en) | 1981-12-29 | 1981-12-29 | Ground transmitter and receiver of inductive radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56211426A JPS58115944A (en) | 1981-12-29 | 1981-12-29 | Ground transmitter and receiver of inductive radio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58115944A true JPS58115944A (en) | 1983-07-09 |
Family
ID=16605748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56211426A Pending JPS58115944A (en) | 1981-12-29 | 1981-12-29 | Ground transmitter and receiver of inductive radio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58115944A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62105563A (en) * | 1985-11-01 | 1987-05-16 | Rohm Co Ltd | Signal transmission and reception circuit |
| JPS62133847A (en) * | 1985-12-05 | 1987-06-17 | Rohm Co Ltd | Signal transmission and reception circuit |
-
1981
- 1981-12-29 JP JP56211426A patent/JPS58115944A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62105563A (en) * | 1985-11-01 | 1987-05-16 | Rohm Co Ltd | Signal transmission and reception circuit |
| JPS62133847A (en) * | 1985-12-05 | 1987-06-17 | Rohm Co Ltd | Signal transmission and reception circuit |
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