JPH01175330A - Data transmitting system by spread spectrum modulating system - Google Patents
Data transmitting system by spread spectrum modulating systemInfo
- Publication number
- JPH01175330A JPH01175330A JP62335942A JP33594287A JPH01175330A JP H01175330 A JPH01175330 A JP H01175330A JP 62335942 A JP62335942 A JP 62335942A JP 33594287 A JP33594287 A JP 33594287A JP H01175330 A JPH01175330 A JP H01175330A
- Authority
- JP
- Japan
- Prior art keywords
- data
- spread spectrum
- communication
- line
- spectrum modulating
- 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
- 238000001228 spectrum Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 abstract description 21
- 230000005236 sound signal Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はスプレッドスペクトラム変調方式によるデータ
伝送方式に関し、特に音声電気信号およびデータを伝送
する伝送路を用い、かつ、この伝送路を用いて既に通信
を行なっている音声通信又は、他のデータ通信と共存し
、同時に通信を行なう事を可能にするスプレッドスペク
トラム変調方式によるデータ伝送方式に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a data transmission method using a spread spectrum modulation method, and in particular uses a transmission line for transmitting audio electrical signals and data, and uses this transmission line. The present invention relates to a data transmission method using a spread spectrum modulation method that allows communication to coexist with voice communication or other data communication and to perform communication at the same time.
従来、この種のデータ伝送方式は、ＦＳＫ、ＰＳＫ又は
ＱＡＭ変調等のキャリア変調方式を使ったモデムを介し
てデータを伝送する方式を用いて、同じ伝送路を使用し
ている通信と共存するため、音声信号と共存させる場合
には周波数帯域を分割する、又は優先順位を設定し２つ
以上の通信が競合しない様にするか、他のデータ伝送と
共存させる場合は、キャリア周波数は相互に影響のない
ものを選択する、又は時分割伝送方式と用いる方法とな
っていた。Conventionally, this type of data transmission method uses a method of transmitting data via a modem using a carrier modulation method such as FSK, PSK or QAM modulation, so that it can coexist with communication using the same transmission path. When coexisting with voice signals, divide the frequency band or set priorities to prevent two or more communications from competing, or when coexisting with other data transmissions, carrier frequencies should not influence each other. The method was to select one that did not have one, or to use a time-division transmission method.
上述した従来の二つ以上の通信を同一伝送路で行なう方
式は周波数帯をそれぞれの通信のために分離する、キャ
リア周波数を相互に影響ない様にする、時分割方式を用
いるなど、特に既存の通信を行なっている所に、新たに
データ通信を追加した場合には、既存システムの改造、
変更を伴うので不便であり、又それぞれ、専有周波数帯
が狭くなる、キャリア周波数の変更を伴う場合がある、
システムが複雑になるという欠点がある。The above-mentioned conventional methods for conducting two or more communications on the same transmission path involve separating frequency bands for each communication, ensuring that carrier frequencies do not affect each other, and using a time division method. If new data communication is added to a place where communication is being carried out, modification of the existing system,
It is inconvenient because it involves changes, and it may also involve narrowing the exclusive frequency band or changing the carrier frequency.
The disadvantage is that the system becomes complicated.
本発明のスプレッドスペクトラム変調方式によるデータ
伝送方式は、電話加入者線等にスプレッドスペクトラム
変調方式によるモデムを介して接続されたデータ端末装
置を有している。The data transmission system using the spread spectrum modulation method of the present invention has a data terminal device connected to a telephone subscriber line or the like via a modem using the spread spectrum modulation method.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示す。第１図において、本
発明の一実施例は２線式加入者線、又は構内線１３にデ
ータ端末装置４，５を接続したデータ伝送方式で、各デ
ータ端末装置４，５はデータインタフェース３、スプレ
ッドスペクトラム変調方式を使用するモデム２および伝
送路用インタフェース１を介して２線式加入者線又は構
内線１３の接続点１１に接続される。ここで加入者側に
用意したデータ端末装置４は交換機側に用意したデータ
端末装置５との間でスプレッドスペクトラム変調方式を
使用するモデムを経由してデータ通信を実施する。この
時、スプレッドスペクトラム変調方式は適当な周波数帯
域とデータ速度を選択することにより、同じ加入者線又
は構内線１３に接続されている変換器１４と電話機１０
を用いた通信に大きな影響を与えることなくこのデータ
通信を実現可能とする。なお、１２は加入者線又は構内
線１３に接続される保護器である。FIG. 1 shows an embodiment of the invention. In FIG. 1, one embodiment of the present invention is a data transmission system in which data terminal devices 4 and 5 are connected to a two-wire subscriber line or local area line 13, and each data terminal device 4 and 5 has a data interface 3, It is connected to a connection point 11 of a two-wire subscriber line or local line 13 via a modem 2 that uses spread spectrum modulation and a transmission line interface 1. Here, the data terminal device 4 provided on the subscriber side performs data communication with the data terminal device 5 provided on the exchange side via a modem using the spread spectrum modulation method. At this time, the spread spectrum modulation method can be applied to the converter 14 and telephone 10 connected to the same subscriber line or local area line 13 by selecting an appropriate frequency band and data rate.
This data communication can be realized without significantly affecting communication using . Note that 12 is a protector connected to the subscriber line or local line 13.
第２図は本発明の他の実施例を示す。第２図において、
この他の実施例は４線式伝送路１５にデータ端末装置６
，７を接続したデータ伝送方式でこの他の実施例は第１
図に示した一実施例と同様にデータインタフェース３と
、スプレッドスペクトラム変調方式を使用するモデム２
と、伝送路用インタフェース１とを介して４線式伝送路
１５の接続点１１に接続されている。ここでこの４線式
伝送路は共通式としてマルチポイント接続されているも
のとし、この場合、各データインタフェース３に接続し
たデータ端末装置６，７の間でデータ通信が可能となる
。この時、スプレッドスペクトラム変調方式を用い、適
当な伝送帯域とデータ速度を選ぶ事により、同じ伝送路
に接続した電話機１０間の会話又はＦＳＫ、ＰＳＫ、Ｑ
ＡＭ等の変調方式を用いたデータ伝送および通信に大き
な影響を与える事なく、このデータ通信が可能となる。FIG. 2 shows another embodiment of the invention. In Figure 2,
In another embodiment, the data terminal device 6 is connected to the 4-wire transmission line 15.
, 7 is connected, and the other embodiment is the first one.
A data interface 3 and a modem 2 using spread spectrum modulation, similar to the embodiment shown in the figure.
It is connected to the connection point 11 of the four-wire transmission line 15 via the transmission line interface 1 and the transmission line interface 1 . Here, it is assumed that this four-wire transmission line is connected as a common type at multiple points, and in this case, data communication is possible between the data terminal devices 6 and 7 connected to each data interface 3. At this time, by using the spread spectrum modulation method and selecting an appropriate transmission band and data rate, conversations between telephones 10 connected to the same transmission path or FSK, PSK, Q
This data communication is possible without significantly affecting data transmission and communication using modulation methods such as AM.
以上説明したように本発明は、スプレッドスペクトラム
変調方式によるデータ伝送方式の伝送帯域とデータ速度
を適当に調整して応用することにより、同じ伝送路を使
う音声信号、およびＦＳＫ、ＰＳＫ、ＱＡＭ変調方式を
使用する通信に影響を少なくして共存させることがで来
る効果がある。As explained above, the present invention can suitably adjust the transmission band and data rate of the data transmission method using the spread spectrum modulation method and apply it to the audio signal using the same transmission path, as well as FSK, PSK, and QAM modulation methods. This has the effect of allowing coexistence with less impact on communication using .
第１図は本発明の一実施例を示す図、第２図は本発明の
他の実施例を示す図である。
１・・・伝送路用インタフェース、２・・・モデム、３
・・・データインタフェース、４〜７・・・データ端末
装置、１０・・・電話機、１１・・・接続点、１２・・
・保護器、１３・・・２線式加入者線又は構内線、１４
・・・交換器、１５・・・４線式伝送路。FIG. 1 is a diagram showing one embodiment of the invention, and FIG. 2 is a diagram showing another embodiment of the invention. 1... Transmission line interface, 2... Modem, 3
...Data interface, 4-7...Data terminal device, 10...Telephone, 11...Connection point, 12...
・Protector, 13...2-wire subscriber line or premises line, 14
...exchanger, 15...4-wire transmission line.
Claims (1)
スプレッドスペクトラム変調方式によるモデムを介して
データ端末装置を接続したことを特徴とするスプレッド
スペクトラム変調方式によるデータ伝送方式。A data transmission system using a spread spectrum modulation method, which is characterized in that a data terminal device is connected to a telephone subscriber line or the like for transmitting audio electrical signals and data via a modem using a spread spectrum modulation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62335942A JPH01175330A (en) | 1987-12-28 | 1987-12-28 | Data transmitting system by spread spectrum modulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62335942A JPH01175330A (en) | 1987-12-28 | 1987-12-28 | Data transmitting system by spread spectrum modulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01175330A true JPH01175330A (en) | 1989-07-11 |
Family
ID=18294065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62335942A Pending JPH01175330A (en) | 1987-12-28 | 1987-12-28 | Data transmitting system by spread spectrum modulating system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01175330A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2393097B (en) * | 2002-05-08 | 2006-03-22 | Inqbator Ltd | Bite-size food product |
| US7346094B2 (en) | 2002-12-13 | 2008-03-18 | International Business Machines Corporation | System and method for transmitting data and additional information simultaneously within a wire based communication system |
-
1987
- 1987-12-28 JP JP62335942A patent/JPH01175330A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2393097B (en) * | 2002-05-08 | 2006-03-22 | Inqbator Ltd | Bite-size food product |
| US7346094B2 (en) | 2002-12-13 | 2008-03-18 | International Business Machines Corporation | System and method for transmitting data and additional information simultaneously within a wire based communication system |
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