JP2005244729A - Signal transmission device - Google Patents

Signal transmission device Download PDF

Info

Publication number
JP2005244729A
JP2005244729A JP2004053302A JP2004053302A JP2005244729A JP 2005244729 A JP2005244729 A JP 2005244729A JP 2004053302 A JP2004053302 A JP 2004053302A JP 2004053302 A JP2004053302 A JP 2004053302A JP 2005244729 A JP2005244729 A JP 2005244729A
Authority
JP
Japan
Prior art keywords
signal
transmission
arbitrary
transmission path
data signal
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
JP2004053302A
Other languages
Japanese (ja)
Inventor
Katsuya Oda
勝哉 尾田
Hitomaro Togo
仁麿 東郷
Yoshiyasu Sato
吉保 佐藤
Hiroaki Asano
弘明 浅野
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2004053302A priority Critical patent/JP2005244729A/en
Publication of JP2005244729A publication Critical patent/JP2005244729A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Bidirectional Digital Transmission (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a signal transmission device which suppresses property impairment even in a transmission path with a limited transmission band, and can perform signal transmission when carrying out analog transmission superimposing an arbitrary signal on a data signal. <P>SOLUTION: A key station device 1 generates the arbitrary signal by a signal generating part 11, superimposes the arbitrary signal on an upwards data signal transmission path (the 2nd transmission path) using a wave combining part 12, and transmits it to a slave station side 2. Thus, when the arbitrary signal is transmitted on the upwards data signal transmission path (the 2nd transmission path), it is possible to transmit without impairment of the arbitrary signal even when bands of the arbitrary signal and the upwards data signal overlap, since transmission directions of the arbitrary signal and the upwards data signal are different in the upwards data signal transmission path (the 2nd transmission path). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、2つの伝送路を介して他局装置と信号伝送を行う信号伝送装置に関する。   The present invention relates to a signal transmission apparatus that performs signal transmission with another station apparatus via two transmission paths.

アナログ信号伝送や移動体通信などの無線伝送システムにおいて、基地局とアンテナとの間のデータ伝送には、データ信号に、データ信号以外の信号(以下、任意信号)を周波数多重により重畳して伝送する方式がある。   In wireless transmission systems such as analog signal transmission and mobile communication, for data transmission between a base station and an antenna, signals other than data signals (hereinafter referred to as arbitrary signals) are superimposed on the data signals by frequency multiplexing. There is a method to do.

例えば、特許文献1には、集中化基地局装置と、複数の無線ゾーンに設置されたアンテナ部との間の信号伝送について、集中化基地局装置が、中間周波数帯のIF信号に、IF信号に近い周波数の無変調波を重畳してアンテナ部に送信し、アンテナ部で受信したIF信号と無変調波を分波し、分波した無変調波を逓倍した局部発振信号を用いてIF信号を無線周波数帯のRF信号に変換する無線伝送システムが記載されている。   For example, in Patent Document 1, for signal transmission between a centralized base station apparatus and antenna units installed in a plurality of radio zones, the centralized base station apparatus converts an IF signal into an IF signal in an intermediate frequency band. An IF signal using a local oscillation signal obtained by superimposing an unmodulated wave with a frequency close to 1 and transmitting to the antenna unit, demultiplexing the IF signal received by the antenna unit and the unmodulated wave, and multiplying the demodulated unmodulated wave Describes a radio transmission system that converts a radio frequency signal into an RF signal in a radio frequency band.

アナログ伝送では、高い直線性が必要とされるため、伝送する信号が無線周波数帯のRF信号のような高周波信号である場合、その周波数が高くなるほど伝送システムが高価になる。したがって、上述の無線伝送システムによれば、信号伝送をIF帯で行うので、伝送システムのコストを下げることができる。また、共通の集中基地局装置側で重畳した無変調波を用いるので、アンテナ部間の同期をとることが可能になる。   In analog transmission, since high linearity is required, when a signal to be transmitted is a high-frequency signal such as an RF signal in a radio frequency band, the transmission system becomes more expensive as the frequency increases. Therefore, according to the above-described wireless transmission system, since signal transmission is performed in the IF band, the cost of the transmission system can be reduced. In addition, since the unmodulated wave superimposed on the common concentrated base station apparatus side is used, synchronization between the antenna units can be achieved.

ここで、上記従来の無線伝送システムにあっては、任意信号の例としての無変調波をデータ信号の伝送方向(下りデータ信号)と同じ伝送路に合波してアンテナ部に送信しているため、任意信号の帯域は伝送特性劣化を起こさないように重畳する信号と離れた帯域に設定する必要がある。   Here, in the above-described conventional wireless transmission system, an unmodulated wave as an example of an arbitrary signal is multiplexed to the same transmission path as the data signal transmission direction (downlink data signal) and transmitted to the antenna unit. Therefore, it is necessary to set the band of the arbitrary signal to a band separated from the signal to be superimposed so as not to cause deterioration of transmission characteristics.

しかしながら、伝送路の伝送帯域制限によっては、設定可能な任意信号の周波数の範囲が限定されてしまう。そのような場合、送信データ信号に任意信号を合波すると任意信号の周波数によっては帯域が重なってしまい、互いに干渉することによる伝送特性劣化が生じてしまう。特に、例えばメタルケーブルなどの伝送路の種類によっては信号損失が大きいもの、あるいは伝送帯域制限が存在するので設定可能な任意信号周波数の範囲が限定されてしまうという事情があった。
特開平6−164427号公報
However, the frequency range of the arbitrary signal that can be set is limited depending on the transmission band limitation of the transmission path. In such a case, when an arbitrary signal is combined with a transmission data signal, bands overlap depending on the frequency of the arbitrary signal, and transmission characteristics deteriorate due to interference with each other. In particular, depending on the type of transmission line such as a metal cable, there is a situation in which the signal loss is large or the range of the arbitrary signal frequency that can be set is limited because there is a transmission band limitation.
JP-A-6-164427

本発明は上記従来の事情を鑑みてなされたものであって、データ信号に任意信号を重畳してアナログ伝送を行う際に、限られた伝送帯域をもつ伝送路においても特性劣化を抑えて信号伝送が可能な信号伝送装置を提供することを目的とする。   The present invention has been made in view of the above-described conventional circumstances. When analog transmission is performed by superimposing an arbitrary signal on a data signal, signal degradation is suppressed even in a transmission line having a limited transmission band. It is an object to provide a signal transmission device capable of transmission.

本発明の信号伝送装置は、他局装置に対する第一のデータ信号を伝送するための第一の伝送路へ接続される第一の接続部と、
前記他局装置からの第二のデータ信号を伝送するための第二の伝送路に接続される第二の接続部と、
任意信号を生成する信号発生手段と、
前記生成された任意信号を、前記第二の伝送路に重畳する合波手段と、
を備える。
The signal transmission device of the present invention, the first connection unit connected to the first transmission path for transmitting the first data signal to the other station device,
A second connection unit connected to a second transmission path for transmitting a second data signal from the other station device;
Signal generating means for generating an arbitrary signal;
Multiplexing means for superimposing the generated arbitrary signal on the second transmission path;
Is provided.

この構成により、データ信号に任意信号を重畳してアナログ伝送を行う際に、限られた伝送帯域をもつ伝送路においても特性劣化を抑えて信号伝送を行うことができる。   With this configuration, when analog transmission is performed by superimposing an arbitrary signal on a data signal, signal transmission can be performed while suppressing characteristic deterioration even in a transmission path having a limited transmission band.

また、本発明の信号伝送装置は、他局装置からの第一のデータ信号を伝送するための第一の伝送路へ接続される第一の接続部と、
前記他局装置へ第二のデータ信号を伝送するための第二の伝送路へ接続される第二の接続部と、
前記他局装置によって前記第二のデータ信号に重畳された任意信号を、前記第二の伝送路から分波する分波手段と、
前記分波された任意信号を獲得する信号獲得手段と、を備える。
Moreover, the signal transmission device of the present invention includes a first connection unit connected to a first transmission path for transmitting a first data signal from another station device,
A second connection unit connected to a second transmission path for transmitting a second data signal to the other station device;
A demultiplexing means for demultiplexing an arbitrary signal superimposed on the second data signal by the other station device from the second transmission path;
Signal acquiring means for acquiring the demultiplexed arbitrary signal.

この構成により、データ信号に任意信号を重畳してアナログ伝送を行う際に、限られた伝送帯域をもつ伝送路においても特性劣化を抑えて信号伝送を行うことができる。   With this configuration, when analog transmission is performed by superimposing an arbitrary signal on a data signal, signal transmission can be performed while suppressing characteristic deterioration even in a transmission path having a limited transmission band.

また、本発明の信号伝送装置は、前記合波手段が方向性結合器の機能を有する。また、前記分波手段が方向性結合器の機能を有する。   In the signal transmission apparatus of the present invention, the multiplexing means has a function of a directional coupler. Further, the branching means has a function of a directional coupler.

この構成により、伝送路が帯域制限されているような場合、任意信号を上りデータ信号伝送路(第二の伝送路)に重畳することで、上りデータ信号と任意信号の帯域が重なっても対向伝送となるのでお互いの伝送特性にほとんど影響を及ぼさず、伝送特性劣化を小さくすることが可能となる。   With this configuration, when the transmission line is band-limited, the arbitrary signal is superimposed on the upstream data signal transmission line (second transmission line), so that the upstream data signal and the arbitrary signal band overlap each other. Since transmission is performed, the transmission characteristics are hardly affected and transmission characteristic deterioration can be reduced.

また、本発明の信号伝送装置は、前記第一のデータ信号を無線周波数帯域から中間周波数帯域へ変換して前記第一の伝送路に出力する第一のデータ信号周波数変換手段と、
前記信号発生手段から出力された前記任意信号の周波数帯域を中間周波数帯域に変換して前記合波手段へ出力する第一の任意信号周波数変換手段と、
をさらに備える。
Further, the signal transmission device of the present invention includes a first data signal frequency converting means for converting the first data signal from a radio frequency band to an intermediate frequency band and outputting it to the first transmission path,
A first arbitrary signal frequency converting means for converting the frequency band of the arbitrary signal output from the signal generating means to an intermediate frequency band and outputting the intermediate signal to the combining means;
Is further provided.

この構成により、IF信号による伝送方式においても、任意信号を上りデータ信号伝送路(第二の伝送路)で伝送することができる。そして、上りデータ信号伝送路(第二の伝送路)内では任意信号と上りデータ信号の伝送方向が異なるため、任意信号と上りデータ信号の帯域が重なったときも伝送が可能となる。また、帯域が重ならない場合も、従来の下りデータ信号伝送路(第一の伝送路)で下りデータ信号と任意信号を伝送するときの特性に比べると劣化を低減できる効果がある。   With this configuration, an arbitrary signal can be transmitted through the uplink data signal transmission path (second transmission path) even in the IF signal transmission method. Since the transmission direction of the arbitrary signal and the upstream data signal is different in the upstream data signal transmission path (second transmission path), transmission is possible even when the bandwidth of the arbitrary signal and the upstream data signal overlap. In addition, even when the bands do not overlap, there is an effect that deterioration can be reduced as compared with the characteristics when the downlink data signal and the arbitrary signal are transmitted through the conventional downlink data signal transmission line (first transmission line).

また、本発明の信号伝送装置は、前記第一の伝送路を介して受信した中間周波数帯域のデータ信号を、無線周波数帯域のデータ信号に周波数変換する第二のデータ信号周波数変換手段と、
前記第二の伝送路から分波して取得した中間周波数帯域の任意信号を、無線周波数帯域の任意信号に周波数変換する第二の任意信号周波数変換手段と、
をさらに備える。
Further, the signal transmission device of the present invention, the second data signal frequency conversion means for frequency converting the data signal of the intermediate frequency band received via the first transmission path into a data signal of the radio frequency band,
A second arbitrary signal frequency converting means for frequency-converting an arbitrary signal in the intermediate frequency band obtained by demultiplexing from the second transmission path into an arbitrary signal in a radio frequency band;
Is further provided.

この構成により、IF信号による伝送方式においても、任意信号を上りデータ信号伝送路(第二の伝送路)で伝送することができる。そして、上りデータ信号伝送路(第二の伝送路)内では任意信号と上りデータ信号の伝送方向が異なるため、任意信号と上りデータ信号の帯域が重なったときも伝送が可能となる。また、帯域が重ならない場合も、従来の下りデータ信号伝送路(第一の伝送路)で下りデータ信号と任意信号を伝送するときの特性に比べると劣化を低減できる効果がある。   With this configuration, an arbitrary signal can be transmitted through the uplink data signal transmission path (second transmission path) even in the IF signal transmission method. Since the transmission direction of the arbitrary signal and the upstream data signal is different in the upstream data signal transmission path (second transmission path), transmission is possible even when the bandwidth of the arbitrary signal and the upstream data signal overlap. In addition, even when the bands do not overlap, there is an effect that deterioration can be reduced as compared with the characteristics when the downlink data signal and the arbitrary signal are transmitted through the conventional downlink data signal transmission line (first transmission line).

また、本発明の信号伝送装置は、前記第一のデータ信号が帯域の異なる2種類のデータ信号を含み、前記2種類のデータ信号のうち一方を第二の伝送路に重畳する第二の合波手段と、
前記第一の伝送路に重畳された前記他局装置からのデータ信号を分波する分波手段と、
をさらに備える。
In the signal transmission device of the present invention, the first data signal includes two types of data signals having different bands, and one of the two types of data signals is superimposed on a second transmission line. Wave means,
Demultiplexing means for demultiplexing the data signal from the other station device superimposed on the first transmission path;
Is further provided.

この構成により、2種類の帯域の重なるデータ信号を伝送する際に、各伝送路で対向伝送となるようにすることで、データ信号の帯域が重なっても対向伝送となるのでお互いの伝送特性にほとんど影響を及ぼさず、伝送特性劣化を小さくすることが可能となる。   With this configuration, when transmitting data signals that overlap two types of bands, opposite transmission is performed on each transmission line, so that even if the data signal bands overlap, opposite transmission occurs, so that the transmission characteristics of each other are improved. It is possible to reduce the degradation of transmission characteristics with little influence.

また、本発明の信号伝送装置は、前記第二の伝送路に重畳された前記他局装置からのデータ信号を分波する第二の分波手段と、
前記第二のデータ信号が帯域の異なる2種類のデータ信号を含み、前記2種類のデータ信号のうち一方を第一の伝送路に重畳する合波手段と、
をさらに備える。
The signal transmission device of the present invention includes a second demultiplexing unit that demultiplexes the data signal from the other station device superimposed on the second transmission path,
The second data signal includes two types of data signals having different bands, and multiplexing means for superimposing one of the two types of data signals on the first transmission path;
Is further provided.

この構成により、2種類の帯域の重なるデータ信号を伝送する際に、各伝送路で対向伝送となるようにすることで、データ信号の帯域が重なっても対向伝送となるのでお互いの伝送特性にほとんど影響を及ぼさず、伝送特性劣化を小さくすることが可能となる。   With this configuration, when transmitting data signals with two types of overlapping bands, the opposite transmission is performed on each transmission path, so that even if the data signal bands overlap, the opposite transmission is performed. It is possible to reduce the degradation of transmission characteristics with little influence.

また、本発明の信号伝送装置は、親局側から子局側に下りデータ信号を伝送する第一の伝送路と、子局側から親局側に上りデータ信号を伝送する第二の伝送路の中継用の信号伝送装置であって、
前記第二の伝送路に重畳された親局側からの任意信号を、前記第二の伝送路から分波する分波手段と、
前記分波された任意信号を獲得する信号獲得手段と、
前記獲得された任意信号に基づいて、第二の任意信号を生成する信号発生手段と、
前記第二の任意信号を前記第二の伝送路に重畳して子局側に伝送する合波手段と、
を備える。
The signal transmission device of the present invention includes a first transmission path for transmitting a downlink data signal from the master station side to the slave station side, and a second transmission path for transmitting the uplink data signal from the slave station side to the master station side. A signal transmission device for relaying,
A demultiplexing means for demultiplexing an arbitrary signal from the master station superimposed on the second transmission path from the second transmission path;
Signal acquisition means for acquiring the demultiplexed arbitrary signal;
Signal generating means for generating a second arbitrary signal based on the acquired arbitrary signal;
Multiplexing means for superimposing the second arbitrary signal on the second transmission path and transmitting it to the slave station side;
Is provided.

この構成により、任意信号を下り伝送路(第一の伝送路)と異なる上り伝送路(第二の伝送路)に重畳して伝送を行う場合の中継装置を実現できる。   With this configuration, it is possible to realize a relay apparatus in which an arbitrary signal is transmitted by being superimposed on an upstream transmission path (second transmission path) different from the downstream transmission path (first transmission path).

本発明によれば、データ信号に任意信号を重畳してアナログ伝送を行う際に、限られた伝送帯域をもつ伝送路においても特性劣化を抑えて信号伝送が可能な信号伝送装置を提供することができる。   According to the present invention, it is possible to provide a signal transmission apparatus capable of transmitting a signal while suppressing characteristic deterioration even in a transmission line having a limited transmission band when an analog signal is superimposed on a data signal for analog transmission. Can do.

(第1の実施形態)
図1は、本発明の第1の実施形態を説明するための信号伝送装置の概略構成を示す図であり、その一例として、親局装置の概略構成を示す。親局装置1は、例えば2芯の伝送路を介して子局装置との双方向伝送を行うものである。
(First embodiment)
FIG. 1 is a diagram showing a schematic configuration of a signal transmission device for explaining a first embodiment of the present invention, and shows a schematic configuration of a master station device as an example. The master station device 1 performs bidirectional transmission with the slave station device via, for example, a two-core transmission path.

図1に示すように、親局装置1は、任意信号を生成する信号発生部11と、第二の伝送路に任意信号を合波する合波部12と、データ送信ポート510と、データ受信ポート511とを備える。データ送信ポート510は、下りデータ信号を第一の伝送路に伝送し、データ受信ポート511は、上りデータ信号を第二の伝送路から受信する。   As shown in FIG. 1, the master station device 1 includes a signal generation unit 11 that generates an arbitrary signal, a multiplexing unit 12 that combines the arbitrary signal on the second transmission path, a data transmission port 510, and data reception Port 511. The data transmission port 510 transmits the downlink data signal to the first transmission line, and the data reception port 511 receives the uplink data signal from the second transmission line.

ここで、信号発生部11で生成される任意信号の例としては、RF帯域内の信号をRF帯域幅以下の周波数帯域に変換してデータを伝送するIF伝送方式に用いられる基準周波数信号、回線の断および信号レベル検出用に用いられるパイロット信号、伝送後のデータ信号の特性劣化を低減させるための信号等が挙げられる。   Here, as an example of the arbitrary signal generated by the signal generator 11, a reference frequency signal used in an IF transmission system for transmitting data by converting a signal in the RF band to a frequency band equal to or less than the RF bandwidth, a line For example, a pilot signal used for signal interruption and signal level detection, a signal for reducing characteristic deterioration of a data signal after transmission, and the like.

任意信号を生成させる信号発生部11として、IF伝送方式に用いられる基準周波数のような高い周波数精度が要求されるような場合は電圧制御発振器(VCO:Voltage Controlled Oscillator)や温度補償型水晶発振器(TCXO:Temperature Compensated Xtal Oscillator)等が好ましい。その他には水晶発振器や発振回路等で実現可能である。合波部12としては周波数フィルタなどで実現できる。また、第一の伝送路および第二の伝送路の例としては、同軸ケーブル、ツイストペアケーブル等のアナログ伝送線が挙げられる。   When a high frequency accuracy such as a reference frequency used in the IF transmission system is required as the signal generator 11 for generating an arbitrary signal, a voltage controlled oscillator (VCO) or a temperature compensated crystal oscillator ( TCXO (Temperature Compensated Xtal Oscillator) is preferable. In addition, it is realizable with a crystal oscillator, an oscillation circuit, etc. The multiplexing unit 12 can be realized by a frequency filter or the like. Examples of the first transmission path and the second transmission path include analog transmission lines such as a coaxial cable and a twisted pair cable.

図2は、データ信号と任意信号の関係を示す図であり、図2(a)は、親局装置1において2つの任意信号を重畳する場合における、本実施形態を適用した場合、図2(b)は本実施形態を適用しない場合の、データ信号と任意信号の関係を周波数軸でそれぞれ表したものである。   FIG. 2 is a diagram illustrating a relationship between a data signal and an arbitrary signal. FIG. 2A illustrates a case where the present embodiment is applied when two arbitrary signals are superimposed in the master station device 1. b) shows the relationship between the data signal and the arbitrary signal on the frequency axis when this embodiment is not applied.

図2に示す例では、信号発生部11は、2つの任意信号を生成する場合を示している。第一の伝送路にすべての任意信号を重畳する場合は、図2(b)中の任意信号300、301と、これの任意信号による高調波成分310、311で示すようにそれぞれの周波数は帯域が重ならないようにする必要がある。   In the example illustrated in FIG. 2, the signal generation unit 11 illustrates a case where two arbitrary signals are generated. When all the arbitrary signals are superimposed on the first transmission line, each frequency has a band as shown by the arbitrary signals 300 and 301 in FIG. 2B and the harmonic components 310 and 311 by the arbitrary signals. It is necessary not to overlap.

しかしながら、特にメタルケーブルやツイストペアケーブル等の伝送線は周波数依存性や帯域制限があるため、設定する周波数によっては任意信号のレベルが減衰してしまい、最悪の場合には、任意信号が伝送できない恐れがある。また、図2(b)に例示するように、2つの任意信号により生じる高調波成分310がデータ伝送帯域内に生じてしまい、ひいては伝送特性劣化をもたらす懸念もある。   However, transmission lines such as metal cables and twisted pair cables, in particular, have frequency dependence and bandwidth limitations, so the level of the arbitrary signal may be attenuated depending on the set frequency. In the worst case, the arbitrary signal may not be transmitted. There is. In addition, as illustrated in FIG. 2B, a harmonic component 310 generated by two arbitrary signals is generated in the data transmission band, which may cause deterioration of transmission characteristics.

次に、図1に示す親局装置1の構成において、さらに、第一の伝送路に任意信号を重畳する合波部を設けた場合を検討してみる。その場合、図2(a)に示すように、信号発生部11から出力される2つの任意信号300、301を同じ周波数に設定し、第1の伝送路と第2の伝送路に分けて伝送できるので、伝送帯域の広がりを押さえることができる。 また、データ信号と任意信号を分離する周波数フィルタも第一、第二で周波数位置関係が同じのため、同じ特性の周波数フィルタを採用することが可能となり、部品の共有化による低コスト化を図ることができる。   Next, in the configuration of the master station device 1 shown in FIG. 1, a case where a multiplexing unit that superimposes an arbitrary signal is provided on the first transmission path will be considered. In this case, as shown in FIG. 2 (a), the two arbitrary signals 300 and 301 output from the signal generator 11 are set to the same frequency, and are transmitted separately to the first transmission line and the second transmission line. Since this is possible, the spread of the transmission band can be suppressed. Also, since the frequency positional relationship between the first and second frequency filters that separate the data signal and the arbitrary signal is the same, it is possible to employ frequency filters with the same characteristics, and to reduce the cost by sharing parts. be able to.

したがって、第二の伝送路に任意信号を重畳する合波部を設けることにより、データ信号に任意信号を重畳してアナログ伝送を行う際に、限られた伝送帯域をもつ伝送路においても特性劣化を抑えて信号伝送を行うことができる。   Therefore, by providing a multiplexing unit that superimposes an arbitrary signal on the second transmission line, when analog transmission is performed by superimposing the arbitrary signal on the data signal, the characteristics deteriorate even in the transmission line having a limited transmission band. Signal transmission can be performed while suppressing the above.

(第2の実施形態)
図3は、本発明の第2の実施形態を説明するための信号伝送装置の概略構成を示す図であり、その一例として、子局装置の概略構成を示す。子局装置2内には第二の伝送路に重畳された任意の信号を第二の伝送路から分波する分波部13と、第二の伝送路から任意信号を取得し、基準周波数信号などを生成する信号獲得部14と、データ送信ポート520と、データ受信ポート521とを備える。データ送信ポート520は、上りデータ信号を第二の伝送路に送出し、データ受信ポート521は、下りデータ信号を第一の伝送路から受信する。
(Second Embodiment)
FIG. 3 is a diagram showing a schematic configuration of a signal transmission device for explaining the second embodiment of the present invention, and shows a schematic configuration of a slave station device as an example. In the slave station device 2, a demultiplexing unit 13 that demultiplexes an arbitrary signal superimposed on the second transmission path from the second transmission path, an arbitrary signal is acquired from the second transmission path, and a reference frequency signal And the like, a data transmission port 520, and a data reception port 521. The data transmission port 520 sends the upstream data signal to the second transmission line, and the data reception port 521 receives the downstream data signal from the first transmission line.

なお、本実施形態の子局装置2は、たとえば、第1の実施形態で示した親局装置1(図1)に対する子局装置として動作する。   The slave station device 2 of the present embodiment operates as a slave station device for the master station device 1 (FIG. 1) shown in the first embodiment, for example.

図4は、データ信号と任意信号の関係を示す図であり、図4(a)、図4(b)は、下りデータ信号と上りデータ信号の帯域が異なり、かつ1つの任意信号を重畳する場合における、本実施形態を適用した場合と適用しない場合の、データ信号と任意信号の関係をそれぞれ周波数軸で表したものである。   FIG. 4 is a diagram illustrating a relationship between a data signal and an arbitrary signal. FIGS. 4A and 4B are different in the band of the downlink data signal and the uplink data signal and superimpose one arbitrary signal. In this case, the relationship between the data signal and the arbitrary signal when the present embodiment is applied and when the present embodiment is not applied is represented on the frequency axis.

周波数依存性や帯域制限などの伝送路の制約により、なるべく低い周波数(データ信号の帯域に近い周波数)の任意信号を用いる必要があるが、一方でデータ信号に重なってしまうと伝送特性劣化をもたらすので低くするにも限界がある。よって、最適な周波数として図4(b)の任意信号300に示すように下りデータ信号100の信号帯域のすぐ近くに設定される。しかし、この周波数位置関係だと、任意信号300を分波するための周波数フィルタの特性は400で示すように急峻なものが必要となる。   It is necessary to use an arbitrary signal with as low a frequency as possible (frequency close to the data signal band) due to restrictions on the transmission path such as frequency dependence and band limitation. However, if it overlaps with the data signal, transmission characteristics will deteriorate. So there is a limit to lowering it. Therefore, the optimum frequency is set in the immediate vicinity of the signal band of the downlink data signal 100 as indicated by the arbitrary signal 300 in FIG. However, with this frequency positional relationship, the characteristics of the frequency filter for demultiplexing the arbitrary signal 300 need to be steep as indicated by 400.

一方、第1の実施形態の信号伝送装置で第二の伝送路に任意信号を重畳するので、図4(a)のように下りデータ信号100の信号帯域のすぐ近くに任意信号の周波数を設定することができる。その場合、本発明の第2の実施形態によれば、分波部13により、第二の伝送路に重畳された任意信号を第二の伝送路から分波して信号獲得を行うので、図4に示すように非対称伝送の場合において、周波数フィルタの特性401も緩やかなものでよい。これにより周波数フィルタの仕様を緩和することができ、コスト低減を図ることができる。言い換えれば、周波数フィルタの仕様を上げることなく、限られた伝送帯域をもつ伝送路においても特性劣化を抑えて信号伝送を可能にすることができる。   On the other hand, since the arbitrary signal is superimposed on the second transmission line in the signal transmission apparatus of the first embodiment, the frequency of the arbitrary signal is set in the immediate vicinity of the signal band of the downlink data signal 100 as shown in FIG. can do. In that case, according to the second embodiment of the present invention, the demultiplexing unit 13 demultiplexes the arbitrary signal superimposed on the second transmission path from the second transmission path, and performs signal acquisition. As shown in FIG. 4, in the case of asymmetric transmission, the frequency filter characteristic 401 may be gentle. Thereby, the specification of the frequency filter can be relaxed, and the cost can be reduced. In other words, signal transmission can be performed while suppressing characteristic deterioration even in a transmission line having a limited transmission band without increasing the specifications of the frequency filter.

なお、図2に示す場合のように親局装置からそれぞれ任意信号が送信される場合は、子局装置2は、図3に示す分波部13に加え、第一の伝送路に重畳された任意信号を分波する分波部をさらに設け、分派した信号を信号獲得部14で信号獲得すればよい。   In addition, when arbitrary signals are transmitted from the master station device as in the case shown in FIG. 2, the slave station device 2 is superimposed on the first transmission line in addition to the demultiplexing unit 13 shown in FIG. A demultiplexing unit that demultiplexes the arbitrary signal may be further provided, and the signal obtained by the demultiplexing signal may be acquired by the signal acquisition unit 14.

(第3の実施形態)
図5は、本発明の第3の実施形態を説明するための信号伝送装置の概略構成を示す図である。なお、第1および第2の実施形態で説明した信号伝送装置と重複する説明は省略する。
(Third embodiment)
FIG. 5 is a diagram showing a schematic configuration of a signal transmission device for explaining a third embodiment of the present invention. In addition, the description which overlaps with the signal transmission apparatus demonstrated in 1st and 2nd embodiment is abbreviate | omitted.

図5に示す本実施形態の信号伝送装置では、親局装置1および子局装置2における、合波部12及び分波部13を方向性結合部(方向性結合器)15の機能を有するもので実現したものである。   In the signal transmission device of this embodiment shown in FIG. 5, the multiplexing unit 12 and the demultiplexing unit 13 in the master station device 1 and the slave station device 2 have the function of a directional coupling unit (directional coupler) 15. It was realized with.

合波部12及び分波部13に代わる方向性結合部(方向性結合器)15としては、ディレクショナルカプラやサーキュレータなどが挙げられる。   Examples of the directional coupling unit (directional coupler) 15 that replaces the multiplexing unit 12 and the demultiplexing unit 13 include a directional coupler and a circulator.

図6は、データ信号(下りデータ信号および上りデータ信号)と任意信号の関係を示す図であり、データ信号帯域が伝送路の帯域限界まで広がっており、かつ1つの任意信号を重畳する場合における、本実施形態を適用した場合(図6(a))と適用しない場合(図6(b))の、データ信号と任意信号の関係を周波数軸で表したものである。   FIG. 6 is a diagram illustrating the relationship between a data signal (downlink data signal and uplink data signal) and an arbitrary signal, in which the data signal band extends to the band limit of the transmission path and one arbitrary signal is superimposed. The relationship between the data signal and the arbitrary signal when the present embodiment is applied (FIG. 6A) and when it is not applied (FIG. 6B) is represented on the frequency axis.

前述したようにメタルケーブルなどのアナログ伝送路は周波数依存性や帯域制限があることがわかっている。仮にデータ信号100(下りデータ信号)の帯域が図6(b)に示すように伝送路の伝送帯域限界まで広がっている時、第一の伝送路に任意の信号を重畳すると図6(b)に示すように任意信号300はデータ信号(下りデータ信号)100の帯域内に入ってしまい、データ間に干渉などの影響をもたらし、ひいては伝送特性劣化を生じる。   As described above, it is known that analog transmission lines such as metal cables have frequency dependency and band limitation. If the band of the data signal 100 (downlink data signal) extends to the transmission band limit of the transmission line as shown in FIG. 6B, if an arbitrary signal is superimposed on the first transmission line, FIG. As shown in FIG. 5, the arbitrary signal 300 enters the band of the data signal (downlink data signal) 100, which causes an influence such as interference between data, and further deteriorates transmission characteristics.

そこで本発明の第3の実施形態で示す方法を用いれば、図6(a)に示すように任意信号300は第二の伝送路に重畳されデータ信号200(上りデータ信号)の帯域内に入ってしまうが、伝送方向が異なるため、図6(b)に示す従来例のように下り伝送路(第一の伝送路)で下りデータ信号100と任意信号300の帯域が重なって伝送されるときの特性に比べ、任意信号300の劣化を低減できる効果がある。   Therefore, if the method shown in the third embodiment of the present invention is used, the arbitrary signal 300 is superimposed on the second transmission line and enters the band of the data signal 200 (upstream data signal) as shown in FIG. However, because the transmission directions are different, the bands of the downlink data signal 100 and the arbitrary signal 300 are transmitted in the downlink transmission path (first transmission path) as in the conventional example shown in FIG. 6B. As compared with the above characteristics, there is an effect that the degradation of the arbitrary signal 300 can be reduced.

このような本実施形態の伝送装置によれば、伝送帯域に制約がある場合でも、信号劣化を抑えて信号伝送を行うことができる。   According to such a transmission apparatus of the present embodiment, signal transmission can be performed while suppressing signal degradation even when the transmission band is limited.

(第4の実施形態)
図7は、本発明の第4の実施形態を説明するための信号伝送装置の概略構成を示す図であり、その一例として、親局装置の概略構成を示す。親局装置1には、第1の実施形態(図1)の構成要素(合波部および信号発生部)に加えて、下りデータ信号の周波数帯域を変換する第1の周波数変換部16、任意信号の周波数帯域を変換する第3の周波数変換部17が設けられている。
(Fourth embodiment)
FIG. 7 is a diagram showing a schematic configuration of a signal transmission device for explaining a fourth embodiment of the present invention, and shows a schematic configuration of a master station device as an example. The master station device 1 includes a first frequency conversion unit 16 that converts the frequency band of the downlink data signal in addition to the constituent elements (the multiplexing unit and the signal generation unit) of the first embodiment (FIG. 1). A third frequency converter 17 for converting the frequency band of the signal is provided.

この第4の実施形態は、第1の実施形態(図1)においてIF(中間周波数)伝送方式を実現するための方法である。   The fourth embodiment is a method for realizing the IF (intermediate frequency) transmission method in the first embodiment (FIG. 1).

IF伝送方式において必要な基準周波数信号は信号発生部11から生成される。具体的には高周波数の高精度信号を生成することができるVCOやTCXO等で実現できる。   A reference frequency signal necessary in the IF transmission method is generated from the signal generator 11. Specifically, it can be realized by a VCO, TCXO, or the like that can generate a high-frequency high-precision signal.

RF帯域内のデータ信号からRF帯域幅以下のIF信号を生成するためには、信号発生部11で生成される基準周波数信号をもとに、第1の周波数変換部16によりIF信号を生成する。具体的には、第1の周波数変換部16はミキサ回路等で実現可能である。こうして、下りデータ信号の周波数帯域をRF帯域からIF帯域に落とすことで、伝送帯域制限をもつ伝送路でもデータ信号の伝送が可能となる。   In order to generate an IF signal having an RF bandwidth or less from a data signal in the RF band, the first frequency converter 16 generates an IF signal based on the reference frequency signal generated by the signal generator 11. . Specifically, the first frequency conversion unit 16 can be realized by a mixer circuit or the like. Thus, by reducing the frequency band of the downlink data signal from the RF band to the IF band, the data signal can be transmitted even on a transmission line having a transmission band restriction.

基準周波数信号は伝送後、データ信号をRF信号に復元するために必要なので子局装置に伝送する必要があるがRF帯域の周波数を持つ基準周波数信号のままでは伝送路の帯域制限があるので伝送できない。よって、第3の周波数変換部17により伝送可能な帯域まで周波数を変換する必要がある。なお、第3の周波数変換部17としては分周器等が適用可能である。   Since the reference frequency signal is necessary to restore the data signal to the RF signal after transmission, it is necessary to transmit it to the slave station device. However, if the reference frequency signal having the frequency of the RF band is used, there is a bandwidth limitation of the transmission path. Can not. Therefore, it is necessary to convert the frequency to a band that can be transmitted by the third frequency converter 17. A frequency divider or the like can be applied as the third frequency conversion unit 17.

以上により、本発明の第4の実施形態によれば、IF帯域での伝送が可能となり、また、基準周波数信号を下り伝送路(第一の伝送路)と異なる上り伝送路(第二の伝送路)に重畳して伝送を行うため、上り・下りの伝送帯域を狭くすることが可能となる。   As described above, according to the fourth embodiment of the present invention, transmission in the IF band becomes possible, and the reference frequency signal is transmitted from the upstream transmission line (second transmission line) different from the downstream transmission line (first transmission line). Since transmission is performed by superimposing on the (route), it is possible to narrow the upstream and downstream transmission bands.

(第5の実施形態)
図8は、本発明の第5の実施形態を説明するための信号伝送装置の概略構成を示す図であり、子局装置の例を示す図である。子局装置2には、下りデータ信号の周波数帯域を変換する第2の周波数変換部18、任意信号の周波数帯域を変換する第4の周波数変換部19で構成されている。
(Fifth embodiment)
FIG. 8 is a diagram showing a schematic configuration of a signal transmission device for explaining a fifth embodiment of the present invention, and is a diagram showing an example of a slave station device. The slave station device 2 includes a second frequency conversion unit 18 that converts the frequency band of the downlink data signal and a fourth frequency conversion unit 19 that converts the frequency band of the arbitrary signal.

この第5の実施形態は、第2の実施形態(図3)においてIF(中間周波数)伝送方式を実現するための方法であり、また、第4の実施形態(図7の親局装置)に対する子局装置となる。   The fifth embodiment is a method for realizing the IF (intermediate frequency) transmission method in the second embodiment (FIG. 3), and is the same as the fourth embodiment (master station apparatus in FIG. 7). It becomes a slave station device.

基準周波数信号は、親局装置の第3の周波数変換部17(図7)により第二の伝送路で伝送可能な帯域まで周波数変換された状態で送信される。子局装置2では分波部13により第二の伝送路から基準周波数信号を取り出す。しかしこの基準周波数信号のままでは、データ信号をIF信号からRF信号へ変換することができないので、この基準周波数信号を第4の周波数変換部19により元のRF帯域の基準周波数信号に変換する。この第4の周波数変換部19としては逓倍器などで実現可能である。   The reference frequency signal is transmitted in a state in which the frequency is converted to a band that can be transmitted through the second transmission path by the third frequency converter 17 (FIG. 7) of the master station device. In the slave station device 2, the reference frequency signal is extracted from the second transmission path by the branching unit 13. However, since the data signal cannot be converted from the IF signal to the RF signal with this reference frequency signal as it is, this reference frequency signal is converted into the reference frequency signal of the original RF band by the fourth frequency converter 19. The fourth frequency converter 19 can be realized by a multiplier or the like.

第4の周波数変換部19により得られたRF帯域の基準周波数信号とIF信号から、第2の周波数変換部18により、もとのRF帯域にある下りデータ信号を得ることができる。なお、この第2の周波数変換部18としてはミキサ回路などで実現可能である。   The downlink data signal in the original RF band can be obtained by the second frequency converter 18 from the reference frequency signal and IF signal in the RF band obtained by the fourth frequency converter 19. The second frequency converter 18 can be realized by a mixer circuit or the like.

以上により、本発明の第5の実施形態を用いれば、IF伝送方式が可能となり、また、基準周波数信号を下り伝送路(第一の伝送路)と異なる上り伝送路(第二の伝送路)に重畳して伝送を行うため、上り・下りの伝送帯域を狭くすることが可能となる。   As described above, if the fifth embodiment of the present invention is used, an IF transmission method is possible, and an upstream transmission path (second transmission path) is different from a downstream transmission path (first transmission path) for a reference frequency signal. Since the transmission is performed by superimposing on the upstream and downstream transmission bands, the upstream and downstream transmission bands can be narrowed.

(第6の実施形態)
図9は、本発明の第6の実施形態を説明するための信号伝送装置の概略構成を示す図であり、親局装置1の構成例を示したものである。親局装置1内には、下りデータ信号と上りデータ信号を分波する分波部30および合波部31が設けられている。この合波部31および分波部30としては、方向性結合器(ディレクショナルカプラ)やサーキュレータなどが挙げられる。
(Sixth embodiment)
FIG. 9 is a diagram showing a schematic configuration of a signal transmission device for explaining the sixth embodiment of the present invention, and shows a configuration example of the master station device 1. In the master station device 1, a demultiplexing unit 30 and a multiplexing unit 31 that demultiplex the downlink data signal and the uplink data signal are provided. Examples of the multiplexing unit 31 and the demultiplexing unit 30 include a directional coupler (directional coupler) and a circulator.

この第6の実施形態は、帯域の重なる2種類のデータ信号の伝送を実現するための方法を示すものである。すなわち、下りデータ信号S11及び上りデータ信号S12のデータ信号と、下りデータ信号S21及び上りデータ信号S22のデータ信号とを、第一の伝送路と第二の伝送路に、以下のようにして、配分して伝送する方法を示すものである。第一の伝送路は、下りデータ信号S11と、上りデータ信号S22を伝送する。第二の伝送路は、下りデータ信号S21と、上りデータ信号S12を伝送する。   The sixth embodiment shows a method for realizing transmission of two types of data signals having overlapping bands. That is, the data signal of the downlink data signal S11 and the uplink data signal S12 and the data signal of the downlink data signal S21 and the uplink data signal S22 are transferred to the first transmission path and the second transmission path as follows. It shows a method of distributing and transmitting. The first transmission path transmits the downlink data signal S11 and the uplink data signal S22. The second transmission path transmits the downlink data signal S21 and the uplink data signal S12.

図10は、第6の実施形態におけるデータ信号の関係を示す図であり、帯域が重なる2種類のデータ信号を伝送する場合に、本実施形態を適用した場合(図10(a))と適用しない場合(図10(b))の、データ信号と任意信号の関係を周波数軸で表したものである。   FIG. 10 is a diagram illustrating the relationship between data signals in the sixth embodiment. When transmitting two types of data signals having overlapping bands, this embodiment is applied (FIG. 10A) and applied. The relationship between the data signal and the arbitrary signal when not performed (FIG. 10B) is represented on the frequency axis.

従来例の装置のように第一の伝送路に両方の下りデータ信号S11、S21を重畳すると図10(b)に示すように帯域の重なる部分が生じるので、データ間に干渉などの影響をもたらし、ひいては伝送特性劣化を生じる。第二の伝送路についても同様である。   When both downlink data signals S11 and S21 are superimposed on the first transmission line as in the conventional apparatus, an overlapping band occurs as shown in FIG. 10 (b), which causes interference such as interference between data. As a result, transmission characteristics deteriorate. The same applies to the second transmission path.

そこで、第6の実施形態で示す方法を用いれば、図10(a)に示すように、第一の伝送路では、下りデータ信号S11と上りデータ信号S22との周波数帯域が重なる部分が生じ、第二の伝送路では、下りデータ信号S21と上りデータ信号S12との周波数帯域が重なる部分が生じるが、それぞれ伝送方向が異なるため、従来例の装置のように下りデータ信号または上りデータ信号同士で帯域が重なって伝送されるときの特性に比べ、劣化が低減できる。   Therefore, if the method shown in the sixth embodiment is used, as shown in FIG. 10A, in the first transmission path, a portion where the frequency bands of the downlink data signal S11 and the uplink data signal S22 overlap is generated. In the second transmission path, there are portions where the frequency bands of the downlink data signal S21 and the uplink data signal S12 overlap. Degradation can be reduced as compared with the characteristics when the bands are overlapped and transmitted.

特に、例えばインターネットに用いるデータ信号と映像信号、無線伝送などに用いられるようなワイドバンドの多キャリア信号をIF変換された信号とイーサの信号をそれぞれ同時に多重し、ツイストペアケーブルや同軸アナログケーブルなど帯域限界がある伝送路でアナログ伝送される場合等に、効果的である。   In particular, for example, data signals and video signals used for the Internet, wideband multi-carrier signals such as those used for wireless transmission, and IF-converted signals and Ethernet signals are simultaneously multiplexed, and twisted pair cables, coaxial analog cables, etc. This is effective when analog transmission is performed on a limited transmission line.

また、第一の実施形態のように、任意信号を発生する信号発生部と、第二の伝送路に任意信号を合波する合波部をさらに設けてもよい。その場合、第二の伝送路で送信する下りデータS21と任意信号の周波数帯域は異なることが好ましい。   Moreover, you may further provide the signal generation part which generate | occur | produces an arbitrary signal, and the multiplexing part which combines an arbitrary signal in a 2nd transmission line like 1st embodiment. In this case, it is preferable that the downlink data S21 transmitted on the second transmission path and the frequency band of the arbitrary signal are different.

(第7の実施形態)
図11は、本発明の第7の実施形態を説明するための信号伝送装置の概略構成を示す図であり、その一例として子局装置の概略構成を示す。図11に示すように、子局装置2には、下りデータ信号と上りデータ信号を分波する分波部30、および下りデータ信号と上りデータ信号を合波する合波部31が設けられている。
(Seventh embodiment)
FIG. 11 is a diagram showing a schematic configuration of a signal transmission device for explaining a seventh embodiment of the present invention, and shows a schematic configuration of a slave station device as an example. As shown in FIG. 11, the slave station device 2 is provided with a demultiplexing unit 30 that demultiplexes the downlink data signal and the uplink data signal, and a multiplexing unit 31 that multiplexes the downlink data signal and the uplink data signal. Yes.

この本実施形態では、帯域の重なる2種類のデータ信号の伝送を実現するための方法であり、第6の実施形態(図9)の親局装置1に対する子局装置2となるものである。   This embodiment is a method for realizing transmission of two types of data signals with overlapping bands, and is a slave station device 2 for the master station device 1 of the sixth embodiment (FIG. 9).

この第7の実施形態では、第一の伝送路から、下りデータ信号S11を取り出すと共に、合波部31により、第一の伝送路に上りデータ信号S22を合波し、親局側に送出する。また、第二の伝送路から分波部30により下りデータ信号S21を取り出すと共に、第二の伝送路により上りデータ信号S12を親局側に送出する。   In the seventh embodiment, the downlink data signal S11 is extracted from the first transmission line, and the multiplexing unit 31 combines the uplink data signal S22 to the first transmission line and sends it to the master station side. . In addition, the demultiplexing unit 30 extracts the downlink data signal S21 from the second transmission path, and sends the uplink data signal S12 to the master station side via the second transmission path.

また、第二の実施形態のように、第二の伝送路に重畳された任意信号を分波する分波部と、分波された任意信号を獲得する信号獲得部をさらに設けてもよい。   Further, as in the second embodiment, a demultiplexing unit that demultiplexes an arbitrary signal superimposed on the second transmission path and a signal acquisition unit that acquires the demultiplexed arbitrary signal may be further provided.

このような本実施形態の信号伝送装置によれば、下りデータ信号S11と上りデータ信号S22との周波数帯域が重なる部分が生じ、第二の伝送路では、下りデータ信号S21と上りデータ信号S12との周波数帯域が重なる部分が生じるが、それぞれ伝送方向が異なるため、下りデータ信号または上りデータ信号同士で帯域が重なって伝送されるときの特性に比べ、劣化が低減できる。   According to such a signal transmission device of the present embodiment, there occurs a portion where the frequency bands of the downlink data signal S11 and the uplink data signal S22 overlap, and in the second transmission path, the downlink data signal S21 and the uplink data signal S12 However, since the transmission directions are different from each other, deterioration can be reduced as compared with characteristics when the downlink data signals or uplink data signals are transmitted with overlapping bands.

(第8の実施形態)
図12は、本発明の第8の実施形態を説明するための信号伝送装置の概略構成を示す図であり、第一の伝送路と第二の伝送路とを中継する中継装置の例を示す図である。図12に示す中継装置3は、第1の実施形態(図1)に示す親局装置1と、第2の実施形態(図3)の子局装置2で実現される機能をひとつの装置で実現するものである。
(Eighth embodiment)
FIG. 12 is a diagram illustrating a schematic configuration of a signal transmission device for describing an eighth embodiment of the present invention, and illustrates an example of a relay device that relays between a first transmission path and a second transmission path. FIG. The relay apparatus 3 shown in FIG. 12 has a function realized by the master station apparatus 1 shown in the first embodiment (FIG. 1) and the slave station apparatus 2 in the second embodiment (FIG. 3) with one apparatus. It is realized.

図12において、信号発生部11および合波部12は、図1に示したものと同様であり、分波部13および信号獲得部14については、図3に示したものと同様である。なお、530はデータ送信ポート、531はデータ受信ポートを示している。   In FIG. 12, the signal generator 11 and the multiplexer 12 are the same as those shown in FIG. 1, and the demultiplexer 13 and the signal acquisition unit 14 are the same as those shown in FIG. Reference numeral 530 denotes a data transmission port, and 531 denotes a data reception port.

中継装置3では、第二の伝送路により親局側から送信される任意信号を、分波部13により分波し、信号獲得部14により再生する。また、信号発生部11で生成した任意信号を、合波部12により第二の伝送路に重畳し子局側に伝送する。   In the relay device 3, an arbitrary signal transmitted from the master station side through the second transmission path is demultiplexed by the demultiplexing unit 13 and reproduced by the signal acquisition unit 14. The arbitrary signal generated by the signal generator 11 is superimposed on the second transmission path by the multiplexer 12 and transmitted to the slave station side.

なお、信号発生部11により生成される信号として、信号獲得部14で獲得した信号をそのまま用いたり、その信号を周波数変換したものを用いることも可能であることはいうまでもない。   Needless to say, as the signal generated by the signal generator 11, the signal acquired by the signal acquisition unit 14 can be used as it is, or the signal obtained by frequency conversion can be used.

以上、本発明の実施形態について説明したが、本発明の信号伝送装置は、上述の図示例にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   Although the embodiments of the present invention have been described above, the signal transmission device of the present invention is not limited to the above illustrated examples, and various modifications can be made without departing from the scope of the present invention. Of course.

本発明は、データ信号に任意信号を重畳してアナログ伝送を行う際に、限られた伝送帯域をもつ伝送路においても特性劣化を抑えて信号伝送が可能な効果を有し、信号伝送装置等に有用である。   The present invention has an effect that signal transmission can be performed while suppressing characteristic deterioration even in a transmission line having a limited transmission band when analog transmission is performed by superimposing an arbitrary signal on a data signal. Useful for.

本発明の第1の実施形態を説明するための信号伝送装置の概略構成を示す図The figure which shows schematic structure of the signal transmission apparatus for demonstrating the 1st Embodiment of this invention. 本発明の第1の実施形態におけるデータ信号と任意信号の関係を示す図The figure which shows the relationship between the data signal and arbitrary signal in the 1st Embodiment of this invention 本発明の第2の実施形態を説明するための信号伝送装置の概略構成を示す図The figure which shows schematic structure of the signal transmission apparatus for demonstrating the 2nd Embodiment of this invention. 本発明の第2の実施形態におけるデータ信号と任意信号の関係を示す図The figure which shows the relationship between the data signal and arbitrary signal in the 2nd Embodiment of this invention. 本発明の第3の実施形態を説明するための信号伝送装置の概略構成を示す図The figure which shows schematic structure of the signal transmission apparatus for demonstrating the 3rd Embodiment of this invention. 本発明の第3の実施形態におけるデータ信号と任意信号の関係を示す図The figure which shows the relationship between the data signal and arbitrary signal in the 3rd Embodiment of this invention. 本発明の第4の実施形態を説明するための信号伝送装置の概略構成を示す図The figure which shows schematic structure of the signal transmission apparatus for demonstrating the 4th Embodiment of this invention. 本発明の第5の実施形態を説明するための信号伝送装置の概略構成を示す図The figure which shows schematic structure of the signal transmission apparatus for demonstrating the 5th Embodiment of this invention. 本発明の第6の実施形態を説明するための信号伝送装置の概略構成を示す図The figure which shows schematic structure of the signal transmission apparatus for demonstrating the 6th Embodiment of this invention. 本発明の第6の実施形態におけるデータ信号の関係を示す図。The figure which shows the relationship of the data signal in the 6th Embodiment of this invention. 本発明の第7の実施形態を説明するための信号伝送装置の概略構成を示す図The figure which shows schematic structure of the signal transmission apparatus for demonstrating the 7th Embodiment of this invention. 本発明の第8の実施形態を説明するための信号伝送装置の概略構成を示す図The figure which shows schematic structure of the signal transmission apparatus for describing the 8th Embodiment of this invention.

符号の説明Explanation of symbols

1 親局装置
2 子局装置
3 中継装置
11 信号発生部
12 合波部
13 分波部
14 信号獲得部
15 方向結合部
16 第1の周波数変換部
17 第3の周波数変換部
18 第2の周波数変換部
19 第4の周波数変換部
30 分波部
31 合波部
100 下りデータ信号
101 下りデータ信号
200 上りデータ信号
201 上りデータ信号
300 任意信号
301 任意信号
310 高調波成分
311 高調波成分
400 分波フィルタ特性
401 分波フィルタ特性
510 親局装置におけるデータ送信ポート
511 親局装置におけるデータ受信ポート
520 子局装置におけるデータ送信ポート
521 子局装置におけるデータ受信ポート
530 中継装置におけるデータ送信ポート
531 中継装置におけるデータ受信ポート
S11 下りデータ信号
S12 上りデータ信号
S21 下りデータ信号
S22 上りデータ信号
DESCRIPTION OF SYMBOLS 1 Master station apparatus 2 Slave station apparatus 3 Relay apparatus 11 Signal generation part 12 Multiplexing part 13 Demultiplexing part 14 Signal acquisition part 15 Direction coupling part 16 1st frequency conversion part 17 3rd frequency conversion part 18 2nd frequency Converter 19 Fourth frequency converter 30 Demultiplexer 31 Combiner 100 Downlink data signal 101 Downlink data signal 200 Uplink data signal 201 Uplink data signal 300 Arbitrary signal 301 Arbitrary signal 310 Harmonic component 311 Harmonic component 400 Demultiplexed Filter characteristic 401 Demultiplexing filter characteristic 510 Data transmission port 511 in master station apparatus Data reception port 520 in master station apparatus Data transmission port 521 in slave station apparatus Data reception port 530 in slave station apparatus Data transmission port 531 in relay apparatus In relay apparatus Data reception port S11 Downlink data signal S12 Uplink data Data signal S21 downlink data signal S22 uplink data signal

Claims (9)

他局装置に対する第一のデータ信号を伝送するための第一の伝送路へ接続される第一の接続部と、
前記他局装置からの第二のデータ信号を伝送するための第二の伝送路に接続される第二の接続部と、
任意信号を生成する信号発生手段と、
前記生成された任意信号を、前記第二の伝送路に重畳する合波手段と、
を備える信号伝送装置。
A first connection unit connected to a first transmission line for transmitting a first data signal to the other station device;
A second connection unit connected to a second transmission path for transmitting a second data signal from the other station device;
Signal generating means for generating an arbitrary signal;
Multiplexing means for superimposing the generated arbitrary signal on the second transmission path;
A signal transmission device comprising:
他局装置からの第一のデータ信号を伝送するための第一の伝送路へ接続される第一の接続部と、
前記他局装置へ第二のデータ信号を伝送するための第二の伝送路へ接続される第二の接続部と、
前記他局装置によって前記第二のデータ信号に重畳された任意信号を、前記第二の伝送路から分波する分波手段と、
前記分波された任意信号を獲得する信号獲得手段と、
を備える信号伝送装置。
A first connection unit connected to a first transmission line for transmitting a first data signal from another station device;
A second connection unit connected to a second transmission path for transmitting a second data signal to the other station device;
A demultiplexing means for demultiplexing an arbitrary signal superimposed on the second data signal by the other station device from the second transmission path;
Signal acquisition means for acquiring the demultiplexed arbitrary signal;
A signal transmission device comprising:
請求項1記載の信号伝送装置であって、前記合波手段が方向性結合器の機能を有する信号伝送装置。   The signal transmission apparatus according to claim 1, wherein the multiplexing unit has a function of a directional coupler. 請求項2記載の信号伝送装置であって、前記分波手段が方向性結合器の機能を有する信号伝送装置。   3. The signal transmission apparatus according to claim 2, wherein the branching means has a function of a directional coupler. 請求項1記載の信号伝送装置であって、
前記第一のデータ信号を無線周波数帯域から中間周波数帯域へ変換して前記第一の伝送路に出力する第一のデータ信号周波数変換手段と、
前記信号発生手段から出力された前記任意信号の周波数帯域を中間周波数帯域に変換して前記合波手段へ出力する第一の任意信号周波数変換手段と、
をさらに備える信号伝送装置。
The signal transmission device according to claim 1,
First data signal frequency converting means for converting the first data signal from a radio frequency band to an intermediate frequency band and outputting the converted signal to the first transmission path;
A first arbitrary signal frequency converting means for converting the frequency band of the arbitrary signal output from the signal generating means to an intermediate frequency band and outputting the intermediate signal to the combining means;
A signal transmission device further comprising:
請求項2記載の信号伝送装置であって、
前記第一の伝送路を介して受信した中間周波数帯域のデータ信号を、無線周波数帯域のデータ信号に周波数変換する第二のデータ信号周波数変換手段と、
前記第二の伝送路から分波して取得した中間周波数帯域の任意信号を、無線周波数帯域の任意信号に周波数変換する第二の任意信号周波数変換手段と、
をさらに備えることを特徴とする信号伝送装置。
The signal transmission device according to claim 2,
A second data signal frequency converting means for converting the frequency of the intermediate frequency band data signal received via the first transmission path into a radio frequency band data signal;
A second arbitrary signal frequency converting means for frequency-converting an arbitrary signal in the intermediate frequency band obtained by demultiplexing from the second transmission path into an arbitrary signal in a radio frequency band;
A signal transmission device further comprising:
請求項1記載の信号伝送装置であって、
前記第一のデータ信号が帯域の異なる2種類のデータ信号を含み、前記2種類のデータ信号のうち一方を第二の伝送路に重畳する第二の合波手段と、
前記第一の伝送路に重畳された前記他局装置からのデータ信号を分波する分波手段と、
をさらに備える信号伝送装置。
The signal transmission device according to claim 1,
The first data signal includes two types of data signals having different bands, and a second multiplexing unit that superimposes one of the two types of data signals on a second transmission path;
Demultiplexing means for demultiplexing the data signal from the other station device superimposed on the first transmission path;
A signal transmission device further comprising:
請求項2記載の信号伝送装置であって、
前記第二の伝送路に重畳された前記他局装置からのデータ信号を分波する第二の分波手段と、
前記第二のデータ信号が帯域の異なる2種類のデータ信号を含み、前記2種類のデータ信号のうち一方を第一の伝送路に重畳する合波手段と、
をさらに備える信号伝送装置。
The signal transmission device according to claim 2,
Second demultiplexing means for demultiplexing the data signal from the other station device superimposed on the second transmission path;
The second data signal includes two types of data signals having different bands, and multiplexing means for superimposing one of the two types of data signals on the first transmission path;
A signal transmission device further comprising:
親局側から子局側に下りデータ信号を伝送する第一の伝送路と、子局側から親局側に上りデータ信号を伝送する第二の伝送路の中継用の信号伝送装置であって、
前記第二の伝送路に重畳された親局側からの任意信号を、前記第二の伝送路から分波する分波手段と、
前記分波された任意信号を獲得する信号獲得手段と、
前記獲得された任意信号に基づいて、第二の任意信号を生成する信号発生手段と、
前記第二の任意信号を前記第二の伝送路に重畳して子局側に伝送する合波手段と、
を備える信号伝送装置。
A signal transmission device for relaying a first transmission path that transmits a downlink data signal from a master station side to a slave station side, and a second transmission path that transmits an uplink data signal from the slave station side to the master station side. ,
A demultiplexing means for demultiplexing an arbitrary signal from the master station superimposed on the second transmission path from the second transmission path;
Signal acquisition means for acquiring the demultiplexed arbitrary signal;
Signal generating means for generating a second arbitrary signal based on the acquired arbitrary signal;
Multiplexing means for superimposing the second arbitrary signal on the second transmission path and transmitting it to the slave station side;
A signal transmission device comprising:
JP2004053302A 2004-02-27 2004-02-27 Signal transmission device Pending JP2005244729A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004053302A JP2005244729A (en) 2004-02-27 2004-02-27 Signal transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004053302A JP2005244729A (en) 2004-02-27 2004-02-27 Signal transmission device

Publications (1)

Publication Number Publication Date
JP2005244729A true JP2005244729A (en) 2005-09-08

Family

ID=35025951

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004053302A Pending JP2005244729A (en) 2004-02-27 2004-02-27 Signal transmission device

Country Status (1)

Country Link
JP (1) JP2005244729A (en)

Similar Documents

Publication Publication Date Title
US10785827B2 (en) Master unit, remote unit and multiband transmission system
US20180323831A1 (en) Master reference for base station network interface sourced from distributed antenna system
USRE47160E1 (en) Distributed antenna system with combination of both all digital transport and hybrid digital/analog transport
CA2898183C (en) Relay apparatus, relay satellite, and satellite communication system
JP2007060311A (en) Radio equipment of rof system and frequency conversion method
KR19990081412A (en) Optical conversion repeater and optical signal transmission method using single optical cable
KR101375722B1 (en) RF front-end apparatus for isolating TX and RX signal
KR200396901Y1 (en) Multi channel combiner/divider of mobile communication systems
JP2005244729A (en) Signal transmission device
EP2566063A1 (en) Wireless communication apparatus and wireless communication method
JP2004214956A (en) Radio lan system using optical fiber and its radio lan repeater
KR101730614B1 (en) Method for Providing In-Building Service By Using Wideband Coupler, In-Building System And Wideband Coupler Therefor
JP7133300B2 (en) Receiving system of diversity type microphone
JP4907890B2 (en) OFDM transmitter
JP2008079023A (en) Relay apparatus, and wireless communication method
WO2011086921A1 (en) Relay device and relay method
JP2019153945A (en) Optical radio converter, wraparound signal remover, communication network, and wraparound signal removing method
JP2011077579A (en) Optical transmission system
JP2007116340A (en) Communication repeater
JP5836508B2 (en) Relay device, relay satellite, and satellite communication system
JP2010041291A (en) Radio communication device
JP2014003537A (en) Satellite communication system
JP2005295235A (en) Two-way optical coaxial transmission system and optical node device
JP2007158851A (en) Two-way wireless communication system
JP4076977B2 (en) Spread spectrum communication apparatus and opposite station receiver

Legal Events

Date Code Title Description
RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20060327

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20061206

A02 Decision of refusal

Effective date: 20070509

Free format text: JAPANESE INTERMEDIATE CODE: A02