JP6347093B2 - Wireless communication system, transmitter, receiver, wireless communication method, and program - Google Patents
Wireless communication system, transmitter, receiver, wireless communication method, and program Download PDFInfo
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本発明は、総じて有線通信システムに比してビット誤り率が劣る電波を用いる通信システムを使用しても有線通信システムとの遜色がない通信品質を期待できる無線通信システムに関する。 The present invention relates to a wireless communication system that can be expected to have communication quality comparable to that of a wired communication system even when a communication system that uses radio waves having a bit error rate inferior to that of a wired communication system is used.
無線通信システムを利用して通信を行う場合に、発信された電波が壁などの周辺の物体(障害物)に反射して複数の伝搬経路が形成され、当該複数の伝搬経路を通ってきた異なる位相の電波の干渉によって通信障害をもたらす現象（マルチパスフェーディング）が当該技術分野の技術者に広く知られている。 When communicating using a wireless communication system, the transmitted radio waves are reflected by surrounding objects (obstacles) such as walls to form a plurality of propagation paths, which are different through the plurality of propagation paths. A phenomenon (multipath fading) that causes communication failure due to phase radio wave interference is widely known to engineers in the technical field.
一般に電波を用いる場合には受信点が異なると、複数の到来波の電波経路長が異なるため干渉の影響度合いが異なることを利用して、従来、複数の受信アンテナで電波を受信し、受信電力が強い方のアンテナからの受信を有効とする手法（アンテナダイバシティ）が採用されている。 In general, when radio waves are used, if the receiving point is different, the radio wave path lengths of multiple incoming waves are different and the influence of interference is different. A method (antenna diversity) that enables reception from the antenna with the stronger antenna is employed.
そんな中にあって、下記特許文献１には、送信機からの信号を複数のアンテナを用いて受信し、受信した複数のアンテナからの信号の位相を受信機内で変化させて合成し、合成した信号の強度が高くなるよう受信機内で信号を調整する信号合成装置が記載されている。 Under such circumstances, in Patent Document 1 below, signals from a transmitter are received using a plurality of antennas, and the phases of the signals received from the plurality of antennas are changed and synthesized in the receiver. A signal synthesizer is described that adjusts the signal within the receiver so that the signal strength is high.
また下記特許文献２には、無線伝送信号を複数の受信手段により受信し、それぞれの受信手段の一方から取り出した合成前の第２の受信高周波信号を帯域通過フィルタにより取り出して合成し、合成前後の信号のレベルを比較回路により比較し、合成出力レベルが規定のレベルを下回る場合には、位相反転回路により第２の受信高周波部の出力信号を位相反転させた上で合成回路により第１の受信高周波部の出力と合成し、合成した出力を復調回路で復調することにより出力を得るダイバーシティ受信機が記載されている。 In Patent Document 2 below, a wireless transmission signal is received by a plurality of receiving means, and a second received high-frequency signal before synthesis extracted from one of the receiving means is extracted by a band-pass filter and synthesized, and before and after synthesis. When the combined output level is lower than the prescribed level, the phase of the output signal of the second reception high-frequency unit is inverted by the phase inverting circuit, and then the first level is output by the combining circuit. A diversity receiver is described in which an output is obtained by synthesizing with an output of a reception high-frequency unit and demodulating the synthesized output by a demodulation circuit.
また下記特許文献３には、複数のアンテナを用いて送信機からの信号を受信し、受信した信号の強度と位相の基準位相からのずれの度合いとを合成し、合成値から決定される受信品質が良好なアンテナからの受信信号を優先して受信する受信機が記載されている。 Further, in Patent Document 3 below, a signal from a transmitter is received using a plurality of antennas, and the received signal strength and the degree of deviation of the phase from the reference phase are combined and received from the combined value. A receiver that preferentially receives a received signal from an antenna with good quality is described.
上記した従来技術のフェーディング対策では、もっぱら一つの送信機から送信された電波を複数の受信アンテナを有する受信機で受信した後に受信機内部で信号処理して受信レベルの良い、或いは受信電力が大きいアンテナから信号を受信するようにしている。 In the above-described fading countermeasures of the prior art, radio waves transmitted exclusively from one transmitter are received by a receiver having a plurality of receiving antennas, and then signal processing is performed inside the receiver to obtain a good reception level or reception power. A signal is received from a large antenna.
すなわち上記特許文献１には、送信機からの信号を複数のアンテナを用いて受信し、受信した複数のアンテナからの信号の位相を受信機内で変化させて合成し、合成した信号の強度が高くなるよう受信機内で信号を調整する信号合成装置が記載されているが、工場などの閉空間の特定の位置に置かれた受信機の通信品質を向上させることについて言及がなされていない。 That is, in Patent Document 1 above, signals from a transmitter are received using a plurality of antennas, and the received signals from the plurality of antennas are synthesized by changing the phases of the signals in the receiver. A signal synthesizer that adjusts the signal in the receiver is described, but no mention is made of improving the communication quality of a receiver placed at a specific position in a closed space such as a factory.
また上記特許文献２には、無線伝送信号を複数の受信手段により受信し、それぞれの受信手段の一方から取り出した合成前の第２の受信高周波信号を帯域通過フィルタにより取り出して合成し、合成前後の信号のレベルを比較回路により比較し、合成出力レベルが規定のレベルを下回る場合には、位相反転回路により第２の受信高周波部の出力信号を位相反転させた上で合成回路により第１の受信高周波部の出力と合成し、合成した出力を復調回路で復調することにより出力を得るダイバーシティ受信機が記載されているが、工場などの閉空間の特定の位置に置かれた受信機の通信品質を向上させることについて言及がなされていない。 In Patent Document 2, a wireless transmission signal is received by a plurality of receiving means, and a second received high-frequency signal before synthesis extracted from one of the receiving means is extracted by a band-pass filter and synthesized. When the combined output level is lower than the prescribed level, the phase of the output signal of the second reception high-frequency unit is inverted by the phase inverting circuit, and then the first level is output by the combining circuit. A diversity receiver is described that combines the output of the reception high-frequency unit and obtains the output by demodulating the combined output with a demodulator circuit, but the communication of the receiver placed in a specific location in a closed space such as a factory There is no mention of improving quality.
また上記特許文献３には、複数のアンテナを用いて送信機からの信号を受信し、受信した信号の強度と位相の基準位相からのずれの度合いとを合成し、合成値から決定される受信品質の良好なアンテナからの受信信号を優先して受信する受信機が記載されているが、工場などの閉空間の特定の位置に置かれた受信機の通信品質を向上させることについて言及がなされていない。 In Patent Document 3, a signal from a transmitter is received using a plurality of antennas, and the received signal strength and the degree of phase deviation from the reference phase are combined and received from the combined value. Although a receiver that preferentially receives a signal received from a good-quality antenna is described, reference is made to improve the communication quality of a receiver placed in a specific position in a closed space such as a factory. Not.
またデータの送受信を無線ＬＡＮ(local area network)を介して相互に無線通信することも当業者によく知られているが、有線を介してデータの送受信するものと比較して総じてビット誤り率が劣るため、信頼性を重視する制御系において無線ＬＡＮを使用してデータの送受信を行うことに二の足を踏まざるを得ないのが現状である。 It is also well known to those skilled in the art that data transmission / reception is performed by wireless communication with each other via a wireless local area network (LAN), but the bit error rate is generally lower than that of data transmission / reception via wire. Therefore, the current situation is that a control system that places importance on reliability must use a wireless LAN to transmit and receive data.
そこで本発明の目的は、データの送受信を無線で行う無線通信システムにおいて、空間の任意又は閉空間の特定の位置に置かれた受信機の通信品質を向上させることができる無線通信システム、送信機、受信機、無線通信方法、および、プログラムを提供するものである。 SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless communication system and transmitter capable of improving the communication quality of a receiver placed at an arbitrary position in a space or a specific position in a closed space in a wireless communication system that transmits and receives data wirelessly. , A receiver, a wireless communication method, and a program.
上記目的を達成するために本発明の無線通信システムは、
送信用と受信用とで２つのアンテナを有する任意の位置に置かれた一つの受信機と、それぞれ送信用と受信用とで２つのアンテナを有する複数の送信機とで構成され、
前記受信機は、
送信機で送信電波の位相を調整するための基準となる基準信号を予め送信する手段と、
複数の送信機から位相が調整されてそれぞれ送信された電波を前記受信機で合成して受信する手段と、を有し、
前記送信機は、
前記受信機から送信された基準信号を受信するまでの経路長を基に位相情報を抽出する手段と、
前記受信機で同位相となるように該位相情報を基に送信信号の位相を調整する手段と、
該位相を調整した送信信号を電波で送信する送信手段と、を有し、
前記受信機から予め送信された基準信号を基に複数の前記送信機それぞれの送信時の位相を調整し複数の前記送信機からそれぞれ送信された電波を前記受信機で合成して受信することを特徴とする。
In order to achieve the above object, the wireless communication system of the present invention provides:
It consists of one receiver placed at an arbitrary position having two antennas for transmission and reception, and a plurality of transmitters having two antennas for transmission and reception , respectively .
The receiver
Means for transmitting in advance a reference signal that serves as a reference for adjusting the phase of the transmission radio wave at the transmitter;
Means for synthesizing and receiving radio waves transmitted from the plurality of transmitters, the phases of which are adjusted respectively, by the receiver;
The transmitter is
Means for extracting phase information based on a path length until receiving a reference signal transmitted from the receiver;
Means for adjusting the phase of the transmission signal based on the phase information so as to be in phase with the receiver;
Transmitting means for transmitting the transmission signal adjusted in phase by radio waves,
By combining the previously transmitted radio waves of the reference signal at the plurality of the transmitters each transmit based on the phase adjusted transmit the plurality of transmitters or Raso respectively from the receiver in the receiver It is characterized by receiving.
上記において前記位相情報を抽出する手段は、
受信機から送信された基準信号を増幅する手段と、該増幅された基準信号と位相調整信号とを合成して合成出力を得る合成手段と、該合成手段からの出力を基に送信信号の位相を調整する制御信号を生成する制御手段と、を有していることを特徴とする。
In the above, the means for extracting the phase information is
Means for amplifying the reference signal transmitted from the receiver, combining means for combining the amplified reference signal and the phase adjustment signal to obtain a combined output, and the phase of the transmission signal based on the output from the combining means And a control means for generating a control signal for adjusting.
また上記において前記送信信号の位相を調整する手段は、
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の同位相となるように調整することを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to be in phase with the reference signal received by the transmitter.
また上記において前記送信信号の位相を調整する手段は、
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の逆位相となるように調整することを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to have an opposite phase to the reference signal received by the transmitter.
また上記において前記送信信号の位相を調整する手段は、
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最大となるようにするフィードバック制御手段と、を有していることを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting the delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the synthesizing means is maximized. It is characterized by that.
また上記において前記送信信号の位相を調整する手段は、
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最小となるようにするフィードバック制御手段と、を有していることを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting a delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the combining means is minimized. It is characterized by that.
また上記目的を達成するために本発明の送信機は、
受信機から予め送信された基準信号を基に複数の送信機それぞれが送信時の位相を調整して複数の前記送信機から送信された電波を前記受信機で合成して受信する無線通信システムに使用される送信機であって、該送信機は、
任意の位置に置かれた受信機に対して、複数の送信機が、位相が調整された電波をそれぞれ送信する送信手段と、
前記受信機から送信された基準信号を受信するまでの経路長を基に位相情報を抽出する手段と、
前記受信機で同位相となるように該位相情報を基に送信信号の位相を調整する手段と、を有していることを特徴とする。
In order to achieve the above object, the transmitter of the present invention provides:
A wireless communication system in which each of a plurality of transmitters adjusts a phase at the time of transmission based on a reference signal transmitted in advance from a receiver and combines and receives radio waves transmitted from the plurality of transmitters at the receiver A transmitter used, the transmitter being
A plurality of transmitters each transmitting a phase-adjusted radio wave to a receiver placed at an arbitrary position; and
Means for extracting phase information based on a path length until receiving a reference signal transmitted from the receiver;
And a means for adjusting the phase of the transmission signal based on the phase information so that the receiver has the same phase.
上記において前記位相情報を抽出する手段は、
受信機から送信された基準信号を増幅する手段と、該増幅された基準信号と位相調整信号とを合成して合成出力を得る合成手段と、該合成手段からの出力を基に送信信号の位相を調整する制御信号を生成する制御手段と、を有していることを特徴とする。
In the above, the means for extracting the phase information is
Means for amplifying the reference signal transmitted from the receiver, combining means for combining the amplified reference signal and the phase adjustment signal to obtain a combined output, and the phase of the transmission signal based on the output from the combining means And a control means for generating a control signal for adjusting.
また上記において前記送信信号の位相を調整する手段は、
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の同位相となるように調整することを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to be in phase with the reference signal received by the transmitter.
また上記において前記送信信号の位相を調整する手段は、
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の逆位相となるように調整することを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to have an opposite phase to the reference signal received by the transmitter.
また上記において前記送信信号の位相を調整する手段は、
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最大となるようにするフィードバック制御手段と、を有していることを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting the delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the synthesizing means is maximized. It is characterized by that.
また上記において前記送信信号の位相を調整する手段は、
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最小となるようにするフィードバック制御手段と、を有していることを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting a delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the combining means is minimized. It is characterized by that.
また上記目的を達成するために本発明の受信機は、
受信機から予め送信された基準信号を基に複数の送信機それぞれが送信時の位相を調整して複数の前記送信機から送信された電波を前記受信機で合成して受信する無線通信システムに使用される受信機であって、該受信機は、
任意の位置に置かれ、複数の送信機で送信電波の位相を調整するための基準となる基準信号を予め送信する手段と、
前記基準信号を受信するまでの経路長を基に送信機が位相情報を抽出し、該抽出した位相情報を基に前記送信機が受信機で同位相となるように送信信号の位相を調整して送信する信号を受信する手段と、
前記複数の送信機から位相が調整されてそれぞれ送信された電波を合成して受信する手段と、を有していることを特徴とする。
In order to achieve the above object, the receiver of the present invention provides:
A wireless communication system in which each of a plurality of transmitters adjusts a phase at the time of transmission based on a reference signal transmitted in advance from a receiver and combines and receives radio waves transmitted from the plurality of transmitters at the receiver A receiver used, the receiver comprising:
Means for preliminarily transmitting a reference signal which is placed at an arbitrary position and serves as a reference for adjusting the phase of a transmission radio wave by a plurality of transmitters;
The transmitter extracts phase information based on the path length until the reference signal is received, and adjusts the phase of the transmission signal so that the transmitter is in phase with the receiver based on the extracted phase information. Means for receiving a signal to be transmitted,
Means for combining and receiving radio waves transmitted from the plurality of transmitters, the phases of which are adjusted, respectively.
また上記目的を達成するために本発明の無線通信方法は、
送信用と受信用とで２つのアンテナを有する任意の位置に置かれた一つの受信機と、それぞれ送信用と受信用とで２つのアンテナを有する複数の送信機とで構成され、
前記受信機において、送信機で送信電波の位相を調整するための基準となる基準信号を予め送信する過程、
前記送信機において、前記受信機から送信された基準信号を受信するまでの経路長を基に送信機で位相情報を抽出する過程、
前記送信機において、前記受信機で同位相となるように前記位相情報を基に送信信号の位相を調整する過程、
前記送信機において、前記位相を調整した送信信号を電波で送信する過程、および、
前記受信機において、複数の送信機から位相が調整されてそれぞれ送信された電波を前記受信機で合成して受信する過程、
を含むことを特徴とする。
In order to achieve the above object, the wireless communication method of the present invention includes:
It consists of one receiver placed at an arbitrary position having two antennas for transmission and reception, and a plurality of transmitters having two antennas for transmission and reception , respectively .
In the receiver, a process of transmitting in advance a reference signal that serves as a reference for adjusting the phase of the transmission radio wave at the transmitter,
In the transmitter, the process of extracting phase information at the transmitter based on the path length until the reference signal transmitted from the receiver is received;
In the transmitter, the process of adjusting the phase of the transmission signal based on the phase information so as to be in phase with the receiver,
In the transmitter, the process of transmitting the phase-adjusted transmission signal by radio waves, and
In the receiver, the process of combining and receiving radio waves transmitted from the transmitters with phases adjusted by the receivers, respectively,
It is characterized by including.
上記において前記位相情報を抽出する過程は、
受信機から送信された基準信号を増幅する過程、該増幅された基準信号と位相調整信号とを合成して合成出力を得る過程、および、該合成出力を基に送信信号の位相を調整する制御信号を生成する過程、を含むことを特徴とする。
In the above, the process of extracting the phase information includes:
A process for amplifying a reference signal transmitted from a receiver, a process for obtaining a combined output by combining the amplified reference signal and a phase adjustment signal, and a control for adjusting the phase of the transmission signal based on the combined output A process of generating a signal.
また上記において前記送信信号の位相を調整する過程は、
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の同位相となるように調整して送信することを特徴とする。
In the above, the process of adjusting the phase of the transmission signal is as follows:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted and transmitted so as to be in phase with the reference signal received by the transmitter. To do.
また上記において前記送信信号の位相を調整する過程は、
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の逆位相となるように調整して送信することを特徴とする。
In the above, the process of adjusting the phase of the transmission signal is as follows:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted and transmitted so as to have an opposite phase to the reference signal received by the transmitter. To do.
また上記において前記送信信号の位相を調整する過程は、
前記制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する過程、および、該位相が調整された送信信号をフィードバックして前記制御信号に基づく遅延量を調整して前記合成出力の振幅が最大となるようにする過程、を含むことを特徴とする。
In the above, the process of adjusting the phase of the transmission signal is as follows:
A process of delaying the phase adjustment signal based on the control signal and adjusting the phase thereof, and a feedback amount of the transmission signal adjusted in phase to adjust a delay amount based on the control signal to adjust the synthesized output Including a process of maximizing the amplitude.
また上記において前記送信信号の位相を調整する過程は、
前記制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する過程、および、該位相が調整された送信信号をフィードバックして前記制御信号に基づく遅延量を調整して前記合成出力の振幅が最小となるようにする過程、を含むことを特徴とする。
In the above, the process of adjusting the phase of the transmission signal is as follows:
A process of delaying the phase adjustment signal based on the control signal and adjusting the phase thereof, and a feedback amount of the transmission signal adjusted in phase to adjust a delay amount based on the control signal to adjust the synthesized output A process for minimizing the amplitude.
また上記目的を達成するために本発明の無線通信システムにおける送信機のコンピュータに機能させるためのプログラムは、
送信用と受信用とで２つのアンテナを有する任意の位置に置かれた一つの受信機と、それぞれ送信用と受信用とで２つのアンテナを有する複数の送信機とで構成され、複数の前記送信機から位相が調整されてそれぞれ送信された電波を前記受信機で合成して受信する無線通信システムにおける送信機のコンピュータを、
前記受信機に対して、複数の送信機が、位相が調整された電波をそれぞれ送信する送信手段、
前記受信機から送信された基準信号を受信するまでの経路長を基に位相情報を抽出する手段、
前記受信機で同位相となるように該位相情報を基に送信信号の位相を調整する手段、として機能させる。
In order to achieve the above object, a program for causing a transmitter computer in the wireless communication system of the present invention to function is as follows.
One receiver placed at an arbitrary position having two antennas for transmission and reception, and a plurality of transmitters having two antennas for transmission and reception , respectively. A computer of a transmitter in a wireless communication system that receives and combines the radio waves transmitted from the transmitter with the phases adjusted respectively by the receiver,
A plurality of transmitters each transmitting a radio wave whose phase is adjusted to the receiver;
Means for extracting phase information based on a path length until receiving a reference signal transmitted from the receiver;
The receiver functions as means for adjusting the phase of the transmission signal based on the phase information so that the phase is the same.
上記において、前記無線通信システムにおける送信機のコンピュータを、前記受信機から送信された基準信号を受信するまでの経路長を基に位相情報を抽出する手段として機能させる場合、さらに、
受信機から送信された基準信号を増幅する手段、
該増幅された基準信号と位相調整信号とを合成して合成出力を得る合成手段、
該合成手段からの出力を基に送信信号の位相を調整する制御信号を生成する制御手段、として機能させることを特徴とする。
In the above, when the computer of the transmitter in the wireless communication system functions as a means for extracting phase information based on a path length until the reference signal transmitted from the receiver is received,
Means for amplifying the reference signal transmitted from the receiver;
A combining means for combining the amplified reference signal and the phase adjustment signal to obtain a combined output;
It is characterized by functioning as control means for generating a control signal for adjusting the phase of the transmission signal based on the output from the synthesizing means.
上記目的を達成するために本発明の無線通信システムは、
閉空間の特定の位置に置かれた受信機と、前記閉空間の周辺位置に置かれた複数の送信機とで構成され、
前記受信機は、
送信機で送信電波の位相を調整するための基準となる基準信号を予め送信する手段と、
複数の送信機から位相が調整されてそれぞれ送信された電波を前記受信機で合成して受信する手段と、を有し、
前記送信機は、
前記受信機から送信された基準信号を受信するまでの経路長を基に位相情報を抽出する手段と、
前記受信機で同位相となるように該位相情報を基に送信信号の位相を調整する手段と、
該位相を調整した送信信号を電波で送信する送信手段と、を有し、
前記受信機から予め送信された基準信号を基に複数の前記送信機それぞれの送信時の位相を調整し複数の前記送信機からそれぞれ送信された電波を前記受信機で合成して受信する、ことを特徴とする。
In order to achieve the above object, the wireless communication system of the present invention provides:
It is composed of a receiver placed at a specific position in the closed space and a plurality of transmitters placed at peripheral positions of the closed space,
The receiver
Means for transmitting in advance a reference signal that serves as a reference for adjusting the phase of the transmission radio wave at the transmitter;
Means for synthesizing and receiving radio waves transmitted from the plurality of transmitters, the phases of which are adjusted respectively, by the receiver;
The transmitter is
Means for extracting phase information based on a path length until receiving a reference signal transmitted from the receiver;
Means for adjusting the phase of the transmission signal based on the phase information so as to be in phase with the receiver;
Transmitting means for transmitting the transmission signal adjusted in phase by radio waves,
Adjusting the phase at the time of transmission of each of the plurality of transmitters based on a reference signal transmitted in advance from the receiver, and combining and receiving radio waves respectively transmitted from the plurality of transmitters, It is characterized by.
また上記において、前記位相情報を抽出する手段は、
受信機から送信された基準信号を増幅する手段と、該増幅された基準信号と位相調整信号とを合成して合成出力を得る合成手段と、該合成手段からの出力を基に送信信号の位相を調整する制御信号を生成する制御手段と、を有していることを特徴とする。
In the above, the means for extracting the phase information is
Means for amplifying the reference signal transmitted from the receiver, combining means for combining the amplified reference signal and the phase adjustment signal to obtain a combined output, and the phase of the transmission signal based on the output from the combining means And a control means for generating a control signal for adjusting .
また上記において、前記送信信号の位相を調整する手段は、
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の同位相となるように調整することを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to be in phase with the reference signal received by the transmitter .
また上記において、前記送信信号の位相を調整する手段は、
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最大となるようにするフィードバック制御手段と、を有していることを特徴とする。
In the above, the means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting the delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the synthesizing means is maximized. It is characterized by that.
本発明によれば、任意の位置に置かれた受信機は、各送信機が発射した電波の位相が同位相または逆位相で一致して合成された信号振幅が最大となる信号を受信するので、たとえ微弱電波で送信したとしても受信機で合成される信号は位相が一致するためその振幅が大きくなることで受信誤りを大幅に減らすことができる。そのため、無線通信システムを使用したとしても有線通信システムとの比較で遜色のない通信品質を期待することができる。
また本発明によれば、閉空間の特定の位置に置かれた受信機は、前記閉空間の周辺位置に置かれた複数の送信機が発射した電波の位相が同位相または逆位相で一致して合成された信号振幅が最大となる信号を受信するので、たとえ微弱電波で送信したとしても受信機で合成される信号は位相が一致するためその振幅が大きくなることで受信誤りを大幅に減らすことができる。そのため、無線通信システムを使用したとしても有線通信システムとの比較で遜色のない通信品質を期待することができる。
According to the present invention, a receiver placed at an arbitrary position receives a signal having a maximum signal amplitude synthesized by the phases of radio waves emitted by the transmitters being matched in phase or in phase . Even if the signal is transmitted by a weak radio wave, the signal synthesized by the receiver has the same phase, so that the amplitude of the signal increases, so that reception errors can be greatly reduced. Therefore, even if a wireless communication system is used, a communication quality comparable to that of a wired communication system can be expected.
According to the present invention, the receiver placed at a specific position in the closed space has the same or opposite phase of the radio waves emitted by the plurality of transmitters placed at the peripheral positions of the closed space. Since the signal with the maximum combined signal amplitude is received, even if it is transmitted with a weak radio wave, the signal synthesized by the receiver has the same phase, so the amplitude increases and reception errors are greatly reduced. be able to. Therefore, even if a wireless communication system is used, a communication quality comparable to that of a wired communication system can be expected.
以下、本発明の実施の形態について、詳細に説明する。
図１は、本発明の実施形態に係る無線通信システムの構成例を示す図である。図１において、本発明の実施形態に係る無線通信システムは、一例として、空間１０が限定されている工場内における適用について説明するが、限定された空間においてのみ本発明が適用されると理解すべきでない。そして空間１０の任意の場所に受信機２０が配置され、また空間１０の任意の場所に複数の送信機１〜６が配置されて構成されている。図１では、空間１０の周辺に送信機１〜６が配置される例が示されているがそれに限定されない。複数の送信機１〜６からは、受信機２０から送信される基準信号に応じ送信電波の位相を調整した電波を発射する。なお、送信電波の位相を調整する機能については後述する。
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a diagram illustrating a configuration example of a wireless communication system according to an embodiment of the present invention. In FIG. 1, the radio communication system according to the embodiment of the present invention will be described as an example of application in a factory where a space 10 is limited, but it will be understood that the present invention is applied only in a limited space. Should not. A receiver 20 is arranged at an arbitrary place in the space 10, and a plurality of transmitters 1 to 6 are arranged at an arbitrary place in the space 10. In FIG. 1, an example in which the transmitters 1 to 6 are arranged around the space 10 is shown, but the present invention is not limited thereto. A plurality of transmitters 1 to 6 emit radio waves in which the phase of the transmission radio wave is adjusted according to the reference signal transmitted from the receiver 20. The function of adjusting the phase of the transmission radio wave will be described later.
空間１０の任意の場所に配置された受信機２０では、複数の送信機１〜６から電波の位相を調整した電波が発射され、当該発射された電波をアンテナ（図示せず）を介して受信する。その場合に本発明の実施形態に係る受信機２０では、各送信機では微弱な送信電波でも受信時の位相が完全に一致している電波を受信するため、振幅が大きくなり且つ妨害波が混入しないため、ビット誤りなく受信することができる。受信機２０以外の受信機にあっては当該受信機に対して位相が調整されていないため受信した電波がランダムに合成されて電力が小さく抑えられるのでビット誤りなく受信するのは困難である。 In the receiver 20 arranged at an arbitrary location in the space 10, radio waves whose radio wave phases are adjusted are emitted from a plurality of transmitters 1 to 6, and the emitted radio waves are received via an antenna (not shown). To do. In that case, in the receiver 20 according to the embodiment of the present invention, each transmitter receives a radio wave whose reception phase completely matches even with a weak transmission radio wave. Therefore, it can be received without bit errors. In receivers other than the receiver 20, since the phase is not adjusted with respect to the receiver, the received radio waves are randomly synthesized and the power is suppressed to be small, so that it is difficult to receive without a bit error.
図２は、本発明の実施形態に係る受信機における受信原理を説明する図である。図２において、図２（ａ）は、受信時の位相が一致した電波の合成を表している。図示例では、振幅Ｐの２つの波が同じ位相で合成されることで、合成された電波は、振幅２Ｐを有する電波として受信される。一方、図２（ｂ）は、受信時の位相が半波長分ずれた電波の合成を表している。図示例では、振幅が同じＰの２つの波が半波長分ずれて合成されることで、合成された電波は、それぞれ打ち消し合って、合成された電波の振幅はゼロになる。 FIG. 2 is a diagram illustrating a reception principle in the receiver according to the embodiment of the present invention. In FIG. 2, FIG. 2 (a) shows the synthesis of radio waves having the same phase at the time of reception. In the illustrated example, two waves having an amplitude P are combined with the same phase, so that the combined radio wave is received as a radio wave having an amplitude 2P. On the other hand, FIG. 2B shows the synthesis of radio waves in which the phase at the time of reception is shifted by a half wavelength. In the illustrated example, two waves of P having the same amplitude are combined with a shift of half wavelength, so that the combined radio waves cancel each other, and the amplitude of the combined radio waves becomes zero.
図２には示していないが、振幅が異なる電波が合成される場合、また、位相のずれが図２（ａ）や図２（ｂ）とは異なる場合の合成波は、上記した例のいずれかの間の振幅で受信されるものとなり、図２（ｂ）に近似するほど信号を受信することが困難となる。 Although not shown in FIG. 2, when radio waves having different amplitudes are synthesized, and when the phase shift is different from those in FIGS. 2 (a) and 2 (b), the synthesized wave is one of the above examples. The signal is received with an amplitude between the two, and the signal becomes more difficult to receive as the approximation to FIG.
図３は、本発明の実施形態に係る受信機及び送信機の構成を示す機能ブロック図である。図３において、受信機２０は、任意の信号を送受するために送信回路(基準信号発生器)２１および受信回路２２を有している。また送信機３０は、任意の信号を送受するために送信回路３１と受信回路(位相抽出回路)３４を有している。送信回路２１、３１において電波に変換された信号は、送信用のアンテナ２３、３３より発射され、受信用のアンテナ３５、２４で受信された後、受信回路３４、２２によって電波から信号に戻される。受信機２０の送信回路２１には基準信号を生成し発射する基準信号発生器が備わっている。一方、送信機３０は、受信機２０の基準信号発生器から発射された基準信号をも受信する受信回路３４と、受信回路３４内に設けられ受信した電波の位相を抽出する位相抽出回路と、該位相抽出回路で抽出した基準信号の位相を基に送信回路３１から放出される送信信号の位相を調整する位相調整回路３２とを有している。位相調整の具体的構成については後述する。 FIG. 3 is a functional block diagram showing the configuration of the receiver and the transmitter according to the embodiment of the present invention. In FIG. 3, the receiver 20 includes a transmission circuit (reference signal generator) 21 and a reception circuit 22 for transmitting and receiving arbitrary signals. The transmitter 30 includes a transmission circuit 31 and a reception circuit (phase extraction circuit) 34 for transmitting and receiving an arbitrary signal. The signals converted into radio waves in the transmission circuits 21 and 31 are emitted from the transmission antennas 23 and 33, received by the reception antennas 35 and 24, and then returned from the radio waves to the signals by the reception circuits 34 and 22. . The transmitter circuit 21 of the receiver 20 includes a reference signal generator that generates and emits a reference signal. On the other hand, the transmitter 30 receives a reference signal emitted from the reference signal generator of the receiver 20, a phase extraction circuit provided in the reception circuit 34 and extracts a phase of the received radio wave, A phase adjustment circuit 32 for adjusting the phase of the transmission signal emitted from the transmission circuit 31 based on the phase of the reference signal extracted by the phase extraction circuit; A specific configuration of the phase adjustment will be described later.
図４は、本発明の実施形態に係る受信機が基準信号を発信している様子を示す図である。図４において、受信機２０から空間１０の任意の場所、図示例では空間１０の周辺、に配置された送信機１〜６のそれぞれまでの距離（電波の経路長）は異なっているので、送信機１〜６がそれぞれ受信する基準信号の位相は異なったものとなる。 FIG. 4 is a diagram illustrating a state in which the receiver according to the embodiment of the present invention transmits a reference signal. In FIG. 4, since the distance (radio wave path length) from the receiver 20 to each of the transmitters 1 to 6 arranged in an arbitrary place in the space 10, in the illustrated example, around the space 10, is different. The phases of the reference signals received by the devices 1 to 6 are different.
以上では、もっぱら空間が限定されている工場内における発明の適用について説明したが、これは単なる例示であって、本発明の適用にあたっては空間が限定されていることを要件とするものでない。 In the above, the application of the invention in a factory where space is limited has been described, but this is merely an example, and the application of the present invention does not require that the space be limited.
図５は、本発明の実施形態に係る受信機が送信した基準信号の位相を基に本発明の実施形態に係る送信機が位相を調整した電波を送信する様子を示す図である。つまり図５には、本発明の実施形態に係る受信機が送信した基準信号を、図１及び図４に示した送信機１〜６の内の任意の送信機Ａ，Ｂで受信した基準信号の位相と、受信した基準信号の位相を基に送信機Ａ，Ｂが位相を調整して電波を送信するときの送信信号を表している。図５に示すように、送信機Ａ，Ｂが受信した基準信号はそれぞれ経路長が異なるため位相が互いに異なるものであり、各受信した基準信号を基にその基準信号の位相と同位相の電波（図５の上に示す破線）又は反転した電波（図５の下に示す実線）をそれぞれ発射すると、図５の上に示す破線の波形および図５の下に示す実線の波形のように、往路と同じ経路を通って受信機に到達する複数の電波は、受信機の位置で位相が一致した信号として受信されるため、送信機１〜６（図示例では送信機Ａ，Ｂ）がたとえ微弱電波で送信したとしても受信機で合成される信号は位相が一致するためその振幅が大きくなり、信号を確実に受信することが可能となる。 FIG. 5 is a diagram illustrating a state in which the transmitter according to the embodiment of the present invention transmits a radio wave whose phase is adjusted based on the phase of the reference signal transmitted by the receiver according to the embodiment of the present invention. That is, in FIG. 5, the reference signal transmitted by the receiver according to the embodiment of the present invention is received by any of the transmitters A and B of the transmitters 1 to 6 shown in FIGS. And the transmission signal when transmitters A and B adjust the phase and transmit radio waves based on the phase of the received reference signal. As shown in FIG. 5, the reference signals received by the transmitters A and B have different path lengths, and therefore have different phases. The radio waves having the same phase as the reference signal based on the received reference signals. (Broken line shown at the top of FIG. 5) or inverted radio wave (solid line shown at the bottom of FIG. 5), respectively, like the waveform of the broken line shown at the top of FIG. 5 and the waveform of the solid line shown at the bottom of FIG. Since a plurality of radio waves that reach the receiver through the same path as the forward path are received as signals having the same phase at the position of the receiver, the transmitters 1 to 6 (transmitters A and B in the illustrated example) Even if the signal is transmitted by a weak radio wave, the signal synthesized by the receiver has the same phase, so that the amplitude becomes large and the signal can be received reliably.
図６は、本発明の実施形態に係る無線通信システムにおける位相調整のための送受信シーケンスを示す図である。つまり、図６は、図５に示す受信機からの基準信号の送信および当該基準信号の位相を基に各送信機で位相を調整し、調整した位相で各送信機が電波を送信するシーケンスを示すものである。受信機が送信する基準信号によって複数の送信機Ａ，Ｂが自身の送信信号の位相を調整することによって、受信機の位置で各送信機が送信した信号の位相、すなわち送信機Ａの送信信号および送信機Ｂの送信信号の位相、が一致し、合成された信号の振幅が最大となるので、信号を確実に受信することができる。その結果、本発明の無線通信システムにおける通信品質と通常の有線通信システムの通信品質との比較でも遜色のない通信品質が期待できる無線通信システムの構築が可能となる。 FIG. 6 is a diagram showing a transmission / reception sequence for phase adjustment in the wireless communication system according to the embodiment of the present invention. That is, FIG. 6 shows a sequence in which each transmitter adjusts the phase based on the transmission of the reference signal from the receiver shown in FIG. 5 and the phase of the reference signal, and each transmitter transmits a radio wave with the adjusted phase. It is shown. The phase of the signal transmitted by each transmitter at the position of the receiver, that is, the transmission signal of the transmitter A, is adjusted by the plurality of transmitters A and B adjusting the phase of its own transmission signal according to the reference signal transmitted by the receiver. And the phase of the transmission signal of the transmitter B coincide with each other, and the amplitude of the synthesized signal is maximized, so that the signal can be reliably received. As a result, it is possible to construct a wireless communication system that can be expected to have a communication quality comparable to the communication quality of the wireless communication system of the present invention and the communication quality of a normal wired communication system.
図７は、本発明の実施形態に係る無線通信システムの処理フローを示す図である。図７は、図５及び図６ですでに説明した内容を処理フローとしてまとめたものである。図７において、（ａ）は受信機の処理動作を、（ｂ）は送信機の処理動作を示すもので、処理動作を受信機と送信機との間におけるシーケンスに関連付けて表示している。 FIG. 7 is a diagram showing a processing flow of the wireless communication system according to the embodiment of the present invention. FIG. 7 summarizes the contents already described in FIG. 5 and FIG. 6 as a processing flow. In FIG. 7, (a) shows the processing operation of the receiver, and (b) shows the processing operation of the transmitter. The processing operation is displayed in association with the sequence between the receiver and the transmitter.
図７において、本発明の実施形態に係る無線通信システムにおける受信機が調整動作を開始すると、ステップS11において基準信号を特定の送信機に向けて電波で送信する。特定の送信機では、調整動作を開始すると、ステップS21において、受信機から送信された基準信号が受信できたかをチェックする。基準信号が受信できなければ受信できるまで繰り返す。 In FIG. 7, when the receiver in the wireless communication system according to the embodiment of the present invention starts the adjustment operation, in step S11, a reference signal is transmitted to a specific transmitter by radio waves. When the specific transmitter starts the adjustment operation, in step S21, it is checked whether the reference signal transmitted from the receiver has been received. If the reference signal cannot be received, the process is repeated until it can be received.
受信機から発射された基準信号が受信できた場合には、ステップS22において、位相抽出を行う。位相抽出の具体的な動作は図８で説明する。ステップS22で位相抽出したら、ステップS23において、位相調整を行う。位相調整の具体的な動作は図８で説明する。ステップS23で位相調整が完了した場合、すなわち、当該送信機において、受信した基準信号と同位相または逆位相にして当該送信機から信号送信する（ステップS24）。 If the reference signal emitted from the receiver can be received, phase extraction is performed in step S22. A specific operation of phase extraction will be described with reference to FIG. After phase extraction in step S22, phase adjustment is performed in step S23. A specific operation of the phase adjustment will be described with reference to FIG. When the phase adjustment is completed in step S23, that is, in the transmitter, the transmitter transmits a signal with the same phase or the opposite phase to the received reference signal (step S24).
受信機は、ステップS12において、図５の上側の破線で示した波形または図５の下側に示した波形で特定の送信機から送信された電波を受信する。なお、特定の送信機に向けた基準信号の送信に対して特定の送信機から図５の上側の破線で示した波形または図５の下側に示した波形で送信機から送信された電波が受信できない場合には、ステップS11に戻り、最初からやり直す。また、信号が受信できた場合には、別の送信機に対して同様に基準信号を送信し、すべての送信機から図５の上側の破線で示した波形または図５の下側に示した波形で送信機から送信された電波を受信できた場合は調整を終了する。そして１つの受信機に対して複数の送信機からデータを送信することで、たとえ微弱電波で送信したとしても受信機で合成される信号は位相が一致するためその振幅が大きくなり、信号を確実に受信することが可能となる。 In step S12, the receiver receives a radio wave transmitted from a specific transmitter with the waveform indicated by the upper broken line in FIG. 5 or the waveform indicated at the lower side in FIG. Note that the radio wave transmitted from the transmitter in the waveform shown by the upper broken line in FIG. 5 or the waveform shown in the lower side of FIG. 5 from the specific transmitter in response to the transmission of the reference signal toward the specific transmitter. If it cannot be received, the process returns to step S11 and starts again. In addition, when the signal can be received, the reference signal is transmitted to another transmitter in the same manner, and the waveform shown by the broken line on the upper side of FIG. 5 or the lower side of FIG. If the radio wave transmitted from the transmitter is received in a waveform, the adjustment is terminated. By transmitting data from multiple transmitters to a single receiver, the signals synthesized by the receivers have the same phase even if they are transmitted using weak radio waves. Can be received.
なお上記における位相調整においては、すべての送信機は、受信機から受信した基準信号と同位相にして当該送信機から信号送信する、若しくは、逆位相にして当該送信機から信号送信する、のいずれか一方に統一して位相を調整することになる。送信機からデータを送信する場合には公知の変調方式を利用することができるが、変調方式の詳細は本発明の主題ではないので割愛することにする。 In the phase adjustment described above, all transmitters either transmit signals from the transmitter in the same phase as the reference signal received from the receiver, or transmit signals from the transmitter in the opposite phase. The phase is adjusted by unifying them. In the case of transmitting data from a transmitter, a known modulation scheme can be used, but details of the modulation scheme are not the subject of the present invention and will be omitted.
図８は、本発明の実施形態に係る送信機の位相調整機能を説明するブロック図である。図８に示す送信機の構成は、受信機からの基準信号をアンテナ３５を介して受信回路３４が受信し、受信回路３４は受信した基準信号の経路長を基に位相情報を抽出し、抽出した位相情報を基に制御回路３４３が制御信号を位相調整回路３２に与えて送信する電波の位相を調整する。より具体的には、受信回路３４において、受信した基準信号はアンプ３４１により増幅されて合成回路３４２の一方に供給され、また合成回路３４２の他方には遅延回路３２１から出力されアンテナ３３に供給される送信信号が供給され、合成回路３４２において二つの信号が合成される。制御回路３４３はフィードバック制御により合成された信号の振幅が最大または最小になるように制御信号を遅延回路３２１に与え、遅延回路３２１は遅延量を制御する。合成回路３４２における二つの信号の合成出力の振幅が最大または最小になるとき、送信信号は基準信号波と同位相または逆位相になっている。送信回路３１の出力である、送信する電波は、遅延回路３２１により基準信号波と同位相または逆位相になるように位相が制御されてアンテナ３３を介して受信機に向けて送信される。ここにおいても上記したように、すべての送信機は、受信機から受信した基準信号と同位相にして当該送信機から信号送信する、若しくは、逆位相にして当該送信機から信号送信する、のいずれか一方に統一して位相を調整することになる。 FIG. 8 is a block diagram illustrating the phase adjustment function of the transmitter according to the embodiment of the present invention. In the configuration of the transmitter shown in FIG. 8, the receiving circuit 34 receives the reference signal from the receiver via the antenna 35, and the receiving circuit 34 extracts and extracts phase information based on the path length of the received reference signal. Based on the phase information thus obtained, the control circuit 343 applies a control signal to the phase adjustment circuit 32 to adjust the phase of the radio wave to be transmitted. More specifically, in the receiving circuit 34, the received reference signal is amplified by the amplifier 341 and supplied to one of the combining circuits 342, and the other of the combining circuits 342 is output from the delay circuit 321 and supplied to the antenna 33. Transmission signal is supplied, and the combining circuit 342 combines the two signals. The control circuit 343 gives a control signal to the delay circuit 321 so that the amplitude of the signal synthesized by the feedback control is maximized or minimized, and the delay circuit 321 controls the delay amount. When the amplitude of the combined output of the two signals in the combining circuit 342 is maximized or minimized, the transmission signal is in phase with or out of phase with the reference signal wave. The radio wave to be transmitted, which is the output of the transmission circuit 31, is transmitted to the receiver via the antenna 33 with the phase controlled by the delay circuit 321 so as to be in phase with or opposite to the reference signal wave. As described above, all transmitters either transmit signals from the transmitter in the same phase as the reference signal received from the receiver, or transmit signals from the transmitter in the opposite phase. The phase is adjusted by unifying them.
１〜６ 送信機
１０ 空間
２０ 受信機
２１ 送信回路（基準信号発生器）
２２ 受信回路
２３、２４、３３、３５ アンテナ
３０ 送信機
３１ 送信回路
３２ 位相調整回路
３４ 受信回路（位相抽出回路）
３２１ 遅延回路
３４１ アンプ
３４２ 合成回路
３４２ 制御回路
1-6 Transmitter 10 Space 20 Receiver 21 Transmitter circuit (reference signal generator)
22 receiving circuit 23, 24, 33, 35 antenna 30 transmitter 31 transmitting circuit 32 phase adjusting circuit 34 receiving circuit (phase extracting circuit)
321 delay circuit 341 amplifier 342 synthesis circuit 342 control circuit
Claims (25)
前記受信機は、
送信機で送信電波の位相を調整するための基準となる基準信号を予め送信する手段と、
複数の送信機から位相が調整されてそれぞれ送信された電波を前記受信機で合成して受信する手段と、を有し、
前記送信機は、
前記受信機から送信された基準信号を受信するまでの経路長を基に位相情報を抽出する手段と、
前記受信機で同位相となるように該位相情報を基に送信信号の位相を調整する手段と、
該位相を調整した送信信号を電波で送信する送信手段と、を有し、
前記受信機から予め送信された基準信号を基に複数の前記送信機それぞれの送信時の位相を調整し複数の前記送信機からそれぞれ送信された電波を前記受信機で合成して受信する、ことを特徴とする無線通信システム。 It consists of one receiver placed at an arbitrary position having two antennas for transmission and reception, and a plurality of transmitters having two antennas for transmission and reception, respectively.
The receiver
Means for transmitting in advance a reference signal that serves as a reference for adjusting the phase of the transmission radio wave at the transmitter;
Means for synthesizing and receiving radio waves transmitted from the plurality of transmitters, the phases of which are adjusted respectively, by the receiver;
The transmitter is
Means for extracting phase information based on a path length until receiving a reference signal transmitted from the receiver;
Means for adjusting the phase of the transmission signal based on the phase information so as to be in phase with the receiver;
Transmitting means for transmitting the transmission signal adjusted in phase by radio waves,
Adjusting the phase at the time of transmission of each of the plurality of transmitters based on a reference signal transmitted in advance from the receiver, and combining and receiving radio waves respectively transmitted from the plurality of transmitters, A wireless communication system.
受信機から送信された基準信号を増幅する手段と、該増幅された基準信号と位相調整信号とを合成して合成出力を得る合成手段と、該合成手段からの出力を基に送信信号の位相を調整する制御信号を生成する制御手段と、を有していることを特徴とする請求項１に記載の無線通信システム。 The means for extracting the phase information is:
Means for amplifying the reference signal transmitted from the receiver, combining means for combining the amplified reference signal and the phase adjustment signal to obtain a combined output, and the phase of the transmission signal based on the output from the combining means The wireless communication system according to claim 1, further comprising: a control unit that generates a control signal for adjusting the frequency.
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の同位相となるように調整することを特徴とする請求項１に記載の無線通信システム。 The means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to be in phase with the reference signal received by the transmitter. The wireless communication system according to 1.
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の逆位相となるように調整することを特徴とする請求項１に記載の無線通信システム。 The means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to have an opposite phase to the reference signal received by the transmitter. The wireless communication system according to 1.
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最大となるようにするフィードバック制御手段と、を有していることを特徴とする請求項２に記載の無線通信システム。 The means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting the delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the synthesizing means is maximized. The wireless communication system according to claim 2.
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最小となるようにするフィードバック制御手段と、を有していることを特徴とする請求項２に記載の無線通信システム。 The means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting a delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the combining means is minimized. The wireless communication system according to claim 2.
任意の位置に置かれた受信機に対して、複数の送信機が、位相が調整された電波をそれぞれ送信する送信手段と、
前記受信機から送信された基準信号を受信するまでの経路長を基に位相情報を抽出する手段と、
前記受信機で同位相となるように該位相情報を基に送信信号の位相を調整する手段と、を有していることを特徴とする送信機。 A wireless communication system in which each of a plurality of transmitters adjusts a phase at the time of transmission based on a reference signal transmitted in advance from a receiver and combines and receives radio waves transmitted from the plurality of transmitters at the receiver A transmitter used, the transmitter being
A plurality of transmitters each transmitting a phase-adjusted radio wave to a receiver placed at an arbitrary position; and
Means for extracting phase information based on a path length until receiving a reference signal transmitted from the receiver;
And a means for adjusting the phase of the transmission signal based on the phase information so that the receiver has the same phase.
受信機から送信された基準信号を増幅する手段と、該増幅された基準信号と位相調整信号とを合成して合成出力を得る合成手段と、該合成手段からの出力を基に送信信号の位相を調整する制御信号を生成する制御手段と、を有していることを特徴とする請求項７に記載の送信機。 The means for extracting the phase information is:
Means for amplifying the reference signal transmitted from the receiver, combining means for combining the amplified reference signal and the phase adjustment signal to obtain a combined output, and the phase of the transmission signal based on the output from the combining means The transmitter according to claim 7, further comprising a control unit that generates a control signal for adjusting the frequency.
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の同位相となるように調整することを特徴とする請求項７または８に記載の送信機。 The means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to be in phase with the reference signal received by the transmitter. The transmitter according to 7 or 8.
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の逆位相となるように調整することを特徴とする請求項７または８に記載の送信機。 The means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to have an opposite phase to the reference signal received by the transmitter. The transmitter according to 7 or 8.
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最大となるようにするフィードバック制御手段と、を有していることを特徴とする請求項８に記載の送信機。 The means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting the delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the synthesizing means is maximized. The transmitter according to claim 8.
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最小となるようにするフィードバック制御手段と、を有していることを特徴とする請求項８に記載の送信機。 The means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting a delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the combining means is minimized. The transmitter according to claim 8.
任意の位置に置かれ、複数の送信機で送信電波の位相を調整するための基準となる基準信号を予め送信する手段と、
前記基準信号を受信するまでの経路長を基に送信機が位相情報を抽出し、該抽出した位相情報を基に前記送信機が受信機で同位相となるように送信信号の位相を調整して送信する信号を受信する手段と、
前記複数の送信機から位相が調整されてそれぞれ送信された電波を合成して受信する手段と、を有していることを特徴とする受信機。 A wireless communication system in which each of a plurality of transmitters adjusts a phase at the time of transmission based on a reference signal transmitted in advance from a receiver and combines and receives radio waves transmitted from the plurality of transmitters at the receiver A receiver used, the receiver comprising:
Means for preliminarily transmitting a reference signal which is placed at an arbitrary position and serves as a reference for adjusting the phase of a transmission radio wave by a plurality of transmitters;
The transmitter extracts phase information based on the path length until the reference signal is received, and adjusts the phase of the transmission signal so that the transmitter is in phase with the receiver based on the extracted phase information. Means for receiving a signal to be transmitted,
Means for combining and receiving radio waves transmitted from the plurality of transmitters, the phases of which are adjusted, respectively.
前記受信機において、送信機で送信電波の位相を調整するための基準となる基準信号を予め送信する過程、
前記送信機において、前記受信機から送信された基準信号を受信するまでの経路長を基に送信機で位相情報を抽出する過程、
前記送信機において、前記受信機で同位相となるように前記位相情報を基に送信信号の位相を調整する過程、
前記送信機において、前記位相を調整した送信信号を電波で送信する過程、および、
前記受信機において、複数の送信機から位相が調整されてそれぞれ送信された電波を前記受信機で合成して受信する過程、
を含むことを特徴とする無線通信方法。 It consists of one receiver placed at an arbitrary position having two antennas for transmission and reception, and a plurality of transmitters having two antennas for transmission and reception, respectively.
In the receiver, a process of transmitting in advance a reference signal that serves as a reference for adjusting the phase of the transmission radio wave at the transmitter
In the transmitter, the process of extracting phase information at the transmitter based on the path length until the reference signal transmitted from the receiver is received;
In the transmitter, the process of adjusting the phase of the transmission signal based on the phase information so as to be in phase with the receiver,
In the transmitter, the process of transmitting the phase-adjusted transmission signal by radio waves, and
In the receiver, the process of combining and receiving radio waves transmitted from the transmitters with phases adjusted by the receivers, respectively,
A wireless communication method comprising:
受信機から送信された基準信号を増幅する過程、該増幅された基準信号と位相調整信号とを合成して合成出力を得る過程、および、該合成出力を基に送信信号の位相を調整する制御信号を生成する過程、を含むことを特徴とする請求項１４に記載の無線通信方法。 The process of extracting the phase information includes:
A process for amplifying a reference signal transmitted from a receiver, a process for obtaining a combined output by combining the amplified reference signal and a phase adjustment signal, and a control for adjusting the phase of the transmission signal based on the combined output 15. The wireless communication method according to claim 14, further comprising a step of generating a signal.
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の同位相となるように調整して送信することを特徴とする請求項１４または１５に記載の無線通信方法。 The process of adjusting the phase of the transmission signal includes:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted and transmitted so as to be in phase with the reference signal received by the transmitter. The wireless communication method according to claim 14 or 15.
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の逆位相となるように調整して送信することを特徴とする請求項１４または１５に記載の無線通信方法。 The process of adjusting the phase of the transmission signal includes:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted and transmitted so as to have an opposite phase to the reference signal received by the transmitter. The wireless communication method according to claim 14 or 15.
前記制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する過程、および、該位相が調整された送信信号をフィードバックして前記制御信号に基づく遅延量を調整して前記合成出力の振幅が最大となるようにする過程、を含むことを特徴とする請求項１５に記載の無線通信方法。 The process of adjusting the phase of the transmission signal includes:
A process of delaying the phase adjustment signal based on the control signal and adjusting the phase thereof, and a feedback amount of the transmission signal adjusted in phase to adjust a delay amount based on the control signal to adjust the synthesized output The wireless communication method according to claim 15, comprising a step of making the amplitude maximum.
前記制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する過程、および、該位相が調整された送信信号をフィードバックして前記制御信号に基づく遅延量を調整して前記合成出力の振幅が最小となるようにする過程、を含むことを特徴とする請求項１５に記載の無線通信方法。 The process of adjusting the phase of the transmission signal includes:
A process of delaying the phase adjustment signal based on the control signal and adjusting the phase thereof, and a feedback amount of the transmission signal adjusted in phase to adjust a delay amount based on the control signal to adjust the synthesized output The wireless communication method according to claim 15, further comprising a step of minimizing the amplitude.
複数の前記送信機から位相が調整されてそれぞれ送信された電波を前記受信機で合成して受信する無線通信システムにおける送信機のコンピュータを、
前記受信機に対して、複数の送信機が、位相が調整された電波をそれぞれ送信する送信手段、
前記受信機から送信された基準信号を受信するまでの経路長を基に位相情報を抽出する手段、
前記受信機で同位相となるように該位相情報を基に送信信号の位相を調整する手段、として機能させるプログラム。 It consists of one receiver placed at an arbitrary position having two antennas for transmission and reception, and a plurality of transmitters having two antennas for transmission and reception, respectively.
A computer of a transmitter in a wireless communication system that receives and combines the radio waves transmitted from the plurality of transmitters with phases adjusted by the receiver,
A plurality of transmitters each transmitting a radio wave whose phase is adjusted to the receiver;
Means for extracting phase information based on a path length until receiving a reference signal transmitted from the receiver;
A program that functions as means for adjusting the phase of a transmission signal based on the phase information so that the receiver has the same phase.
受信機から送信された基準信号を増幅する手段、
該増幅された基準信号と位相調整信号とを合成して合成出力を得る合成手段、
該合成手段からの出力を基に送信信号の位相を調整する制御信号を生成する制御手段、として機能させることを特徴とする請求項２０に記載のプログラム。 When the computer of the transmitter in the wireless communication system functions as a means for extracting phase information based on a path length until the reference signal transmitted from the receiver is received,
Means for amplifying the reference signal transmitted from the receiver;
A combining means for combining the amplified reference signal and the phase adjustment signal to obtain a combined output;
21. The program according to claim 20, wherein the program functions as control means for generating a control signal for adjusting a phase of a transmission signal based on an output from the synthesizing means.
前記受信機は、
送信機で送信電波の位相を調整するための基準となる基準信号を予め送信する手段と、
複数の送信機から位相が調整されてそれぞれ送信された電波を前記受信機で合成して受信する手段と、を有し、
前記送信機は、
前記受信機から送信された基準信号を受信するまでの経路長を基に位相情報を抽出する手段と、
前記受信機で同位相となるように該位相情報を基に送信信号の位相を調整する手段と、
該位相を調整した送信信号を電波で送信する送信手段と、を有し、
前記受信機から予め送信された基準信号を基に複数の前記送信機それぞれの送信時の位相を調整し複数の前記送信機からそれぞれ送信された電波を前記受信機で合成して受信する、ことを特徴とする無線通信システム。 It is composed of a receiver placed at a specific position in the closed space and a plurality of transmitters placed at peripheral positions of the closed space,
The receiver
Means for transmitting in advance a reference signal that serves as a reference for adjusting the phase of the transmission radio wave at the transmitter;
Means for synthesizing and receiving radio waves transmitted from the plurality of transmitters, the phases of which are adjusted, respectively, at the receiver;
The transmitter is
Means for extracting phase information based on a path length until receiving a reference signal transmitted from the receiver;
Means for adjusting the phase of the transmission signal based on the phase information so as to be in phase with the receiver;
Transmitting means for transmitting the transmission signal adjusted in phase by radio waves,
Adjusting the phase at the time of transmission of each of the plurality of transmitters based on a reference signal transmitted in advance from the receiver, and combining and receiving radio waves respectively transmitted from the plurality of transmitters, A wireless communication system.
受信機から送信された基準信号を増幅する手段と、該増幅された基準信号と位相調整信号とを合成して合成出力を得る合成手段と、該合成手段からの出力を基に送信信号の位相を調整する制御信号を生成する制御手段と、を有していることを特徴とする請求項２２に記載の無線通信システム。 The means for extracting the phase information is:
Means for amplifying the reference signal transmitted from the receiver, combining means for combining the amplified reference signal and the phase adjustment signal to obtain a combined output, and the phase of the transmission signal based on the output from the combining means 23. The wireless communication system according to claim 22, further comprising control means for generating a control signal for adjusting the frequency.
前記受信機から送信された基準信号を当該送信機で受信し、送信機から送信する送信信号を当該送信機で受信した前記基準信号の同位相となるように調整することを特徴とする請求項２２に記載の無線通信システム。 The means for adjusting the phase of the transmission signal is:
The reference signal transmitted from the receiver is received by the transmitter, and the transmission signal transmitted from the transmitter is adjusted to be in phase with the reference signal received by the transmitter. 23. The wireless communication system according to 22.
前記制御手段から出力される制御信号に基づいて前記位相調整信号を遅延させてその位相を調整する遅延手段と、該遅延手段から出力される位相が調整された前記位相調整信号を前記制御手段にフィードバックして前記制御手段から出力される制御信号に基づく前記遅延手段の遅延量を調整して前記合成手段から得られる信号の振幅が最大となるようにするフィードバック制御手段と、を有していることを特徴とする請求項２３に記載の無線通信システム。 The means for adjusting the phase of the transmission signal is:
Delay means for delaying the phase adjustment signal based on a control signal output from the control means and adjusting the phase thereof, and the phase adjustment signal adjusted in phase output from the delay means to the control means Feedback control means for adjusting the delay amount of the delay means based on a control signal fed back and output from the control means so that the amplitude of the signal obtained from the synthesizing means is maximized. 24. The wireless communication system according to claim 23 .
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