JP2022136716A - Wireless communication system, wireless communication method and transmitter - Google Patents

Wireless communication system, wireless communication method and transmitter Download PDF

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JP2022136716A
JP2022136716A JP2021036458A JP2021036458A JP2022136716A JP 2022136716 A JP2022136716 A JP 2022136716A JP 2021036458 A JP2021036458 A JP 2021036458A JP 2021036458 A JP2021036458 A JP 2021036458A JP 2022136716 A JP2022136716 A JP 2022136716A
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data signal
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transmission
modulation
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JP7474992B2 (en
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隼人 福園
Hayato Fukusono
圭太 栗山
Keita Kuriyama
正文 吉岡
Masabumi Yoshioka
利文 宮城
Toshifumi Miyagi
文明 前原
Fumiaki Maehara
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Waseda University
Nippon Telegraph and Telephone Corp
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Nippon Telegraph and Telephone Corp
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Abstract

To enhance transmission quality.SOLUTION: A wireless communication system includes an information bit generator 12 that generates information bits to be transmitted from a transmitter 10 to a receiver 20, a data signal modulator 13 that modulates the information bits generated by the information bit generator 12 into a data signal, an FTN processing unit 14 that performs FTN processing on the data signal modulated by the data signal modulator 13, a transmission signal conversion unit 15 that performs conversion for transmitting the data signal processed by the FTN processing unit 14 to the receiver 20, and a controller 16 that selects a combination bringing optimum communication quality from combinations in which PAPR is equal to or less than an allowable value according to an MIMO multiplexing number and the number of transmission bits is equal, among combinations of a modulation method by the data signal modulator 13 and an FTN efficiency by the FTN processing unit 14 at the time of MIMO multiplexing, and controls the data signal modulator 13 and the FTN processing unit 14 based on the selection result.SELECTED DRAWING: Figure 1

Description

本開示は、無線通信システム、無線通信方法および送信装置に関するものである。 TECHNICAL FIELD The present disclosure relates to a wireless communication system, wireless communication method, and transmitting device.

非特許文献１には、ＦＴＮ（faster than nyquist）伝送に関する技術が開示されている。ＦＴＮ伝送は、クロック周波数を超えるシンボルレートで変調シンボルを送出する手法である。ＦＴＮ伝送によれば、同伝送ビット数の高次ＱＡＭ変調と比較して、ＰＡＰＲの低減が期待できる。 Non-Patent Document 1 discloses a technology related to FTN (faster than nyquist) transmission. FTN transmission is a technique of sending modulation symbols at a symbol rate that exceeds the clock frequency. According to FTN transmission, reduction in PAPR can be expected compared to high-order QAM modulation with the same number of transmission bits.

J.A.Lucciardi, et al., "Trade-off between spectral efficiency increase and PAPR reduction when using FTN signaling: Impact of non linearities," IEEE ICC 2016.J.A.Lucciardi, et al., "Trade-off between spectral efficiency increase and PAPR reduction when using FTN signaling: Impact of non linearities," IEEE ICC 2016.

従来のＦＴＮと低次変調方式との組み合わせによれば、ＰＡＰＲを上げずに高伝送ビット数を表現できる。ただし、シンボル間干渉（ISI）が大きくなり、伝送品質が劣化する懸念がある。 A combination of a conventional FTN and a low-order modulation scheme can express a high number of transmission bits without raising the PAPR. However, there is concern that inter-symbol interference (ISI) will increase and transmission quality will deteriorate.

本開示は、上記のような課題を解決するためになされたものである。本開示の目的は、伝送品質を向上させることができる無線通信システム、無線通信方法および送信装置を得ることである。 The present disclosure has been made to solve the above problems. An object of the present disclosure is to obtain a wireless communication system, a wireless communication method, and a transmitting device capable of improving transmission quality.

本開示に係る無線通信システムは、ＭＩＭＯ多重化機能と適応変調機能とを備えた送信装置および当該送信装置から信号を受信する受信装置から構成される無線通信システムである。無線通信システムは、送信装置から受信装置に伝送する情報ビットを生成する情報ビット生成部と、情報ビット生成部によって生成された情報ビットをデータ信号に変調するデータ信号変調部と、データ信号変調部によって変調されたデータ信号にＦＴＮ処理を施すＦＴＮ処理部と、ＦＴＮ処理部によって処理されたデータ信号を受信装置に対して伝送するための変換を行う送信信号変換部と、ＭＩＭＯ多重化時に、データ信号変調部による変調方式とＦＴＮ処理部によるＦＴＮ効率との組み合わせのうち、ＰＡＰＲがＭＩＭＯ多重数に応じた許容値以下で且つ伝送ビット数が等しい組み合わせから通信品質が最適となる組み合わせを選択し、当該選択結果に基づいてデータ信号変調部とＦＴＮ処理部とを制御する制御部と、を備える。
本開示に係る無線通信方法は、ＭＩＭＯ多重化機能と適応変調機能とを備えた送信装置および当該送信装置から信号を受信する受信装置が行う無線通信方法である。無線通信方法は、送信装置から受信装置に伝送する情報ビットを生成する情報ビット生成工程と、情報ビット生成工程によって生成された情報ビットをデータ信号に変調するデータ信号変調工程と、データ信号変調工程によって変調されたデータ信号にＦＴＮ処理を施すＦＴＮ処理工程と、ＦＴＮ処理工程によって処理されたデータ信号を受信装置に対して伝送するための変換を行う送信信号変換工程と、ＭＩＭＯ多重化時に、データ信号変調工程による変調方式とＦＴＮ処理工程によるＦＴＮ効率との組み合わせのうち、ＰＡＰＲがＭＩＭＯ多重数に応じた許容値以下で且つ伝送ビット数が等しい組み合わせから通信品質が最適となる組み合わせを選択し、当該選択結果に基づいてデータ信号変調工程とＦＴＮ処理工程とを制御する制御工程と、を備える。
本開示に係る送信装置は、ＭＩＭＯ多重化機能と適応変調機能とを備えた送信装置である。送信装置は、受信装置に伝送する情報ビットを生成する情報ビット生成部と、情報ビット生成部によって生成された情報ビットをデータ信号に変調するデータ信号変調部と、データ信号変調部によって変調されたデータ信号にＦＴＮ処理を施すＦＴＮ処理部と、ＦＴＮ処理部によって処理されたデータ信号を受信装置に対して伝送するための変換を行う送信信号変換部と、ＭＩＭＯ多重化時に、データ信号変調部による変調方式とＦＴＮ処理部によるＦＴＮ効率との組み合わせのうち、ＰＡＰＲがＭＩＭＯ多重数に応じた許容値以下で且つ伝送ビット数が等しい組み合わせから通信品質が最適となる組み合わせを選択し、当該選択結果に基づいてデータ信号変調部とＦＴＮ処理部とを制御する制御部と、を備える。 A radio communication system according to the present disclosure is a radio communication system including a transmitting device having a MIMO multiplexing function and an adaptive modulation function and a receiving device that receives signals from the transmitting device. A wireless communication system includes an information bit generator that generates information bits to be transmitted from a transmitter to a receiver, a data signal modulator that modulates the information bits generated by the information bit generator into a data signal, and a data signal modulator. an FTN processing unit that performs FTN processing on the data signal modulated by the FTN processing unit; a transmission signal conversion unit that performs conversion for transmitting the data signal processed by the FTN processing unit to the receiving device; Among the combinations of the modulation method by the signal modulation unit and the FTN efficiency by the FTN processing unit, select a combination that has the optimum communication quality from combinations in which the PAPR is equal to or less than the allowable value according to the number of MIMO multiplexes and the number of transmission bits is the same, a control unit that controls the data signal modulation unit and the FTN processing unit based on the selection result;
A wireless communication method according to the present disclosure is a wireless communication method performed by a transmitting device having a MIMO multiplexing function and an adaptive modulation function and a receiving device that receives signals from the transmitting device. A wireless communication method comprises an information bit generation step of generating information bits to be transmitted from a transmitter to a receiver, a data signal modulation step of modulating the information bits generated by the information bit generation step into a data signal, and a data signal modulation step. an FTN processing step of performing FTN processing on the data signal modulated by the FTN processing step; a transmission signal conversion step of performing conversion for transmitting the data signal processed by the FTN processing step to the receiving device; Among the combinations of the modulation method by the signal modulation process and the FTN efficiency by the FTN processing process, select a combination that has the optimum communication quality from combinations in which the PAPR is equal to or less than the allowable value according to the number of MIMO multiplexes and the number of transmission bits is the same, and a control step for controlling the data signal modulation step and the FTN processing step based on the selection result.
A transmitting device according to the present disclosure is a transmitting device having a MIMO multiplexing function and an adaptive modulation function. The transmitter includes an information bit generator that generates information bits to be transmitted to the receiver, a data signal modulator that modulates the information bits generated by the information bit generator into a data signal, and a data signal modulated by the data signal modulator. An FTN processing unit that performs FTN processing on the data signal, a transmission signal conversion unit that performs conversion for transmitting the data signal processed by the FTN processing unit to the receiving device, and a data signal modulation unit that performs MIMO multiplexing Of the combinations of the modulation scheme and the FTN efficiency by the FTN processing unit, select the combination that has the optimum communication quality from the combinations in which the PAPR is equal to or less than the allowable value according to the MIMO multiplexing number and the number of transmission bits is the same, and the selection result is and a control unit for controlling the data signal modulation unit and the FTN processing unit based on the data signal modulation unit.

本開示によれば、伝送品質を向上させることができる無線通信システム、無線通信方法および送信装置を得ることができる。 Advantageous Effects of Invention According to the present disclosure, it is possible to obtain a wireless communication system, a wireless communication method, and a transmitting device capable of improving transmission quality.

実施の形態１に係る無線通信システムの構成を模式的に示すブロック図である。1 is a block diagram schematically showing the configuration of a radio communication system according to Embodiment 1; FIG. 無線通信システムにおけるＰＡＰＲの許容値を説明する図である。FIG. 2 is a diagram for explaining allowable values of PAPR in a radio communication system; ＦＴＮ効率と変調方式との組み合わせによるＩＳＩおよびＰＡＰＲの例を示すテーブルである。4 is a table showing examples of ISI and PAPR according to combinations of FTN efficiencies and modulation schemes;

添付の図面を参照して、実施の形態について説明する。本開示では、重複する説明については、適宜に簡略化または省略する。なお、本開示は、以下の各実施の形態に限定されるものではない。本開示には、その趣旨を逸脱しない範囲において、以下の各実施の形態によって開示される構成の種々の変形および組み合わせが含まれ得る。 Embodiments will be described with reference to the accompanying drawings. In the present disclosure, overlapping descriptions are appropriately simplified or omitted. Note that the present disclosure is not limited to the following embodiments. The present disclosure may include various modifications and combinations of configurations disclosed by the following embodiments within the scope of the present disclosure.

実施の形態１．
図１は、実施の形態１に係る無線通信システムの構成を模式的に示すブロック図である。本実施の形態に係る無線通信システムは、ＭＩＭＯ多重化機能と適応変調機能とを備えるシステムである。無線通信システムは、信号を送信する送信装置１０と、当該送信装置１０から信号を受信する受信装置２０と、から構成される。 Embodiment 1.
FIG. 1 is a block diagram schematically showing the configuration of a radio communication system according to Embodiment 1. FIG. A radio communication system according to the present embodiment is a system having a MIMO multiplexing function and an adaptive modulation function. A wireless communication system includes a transmitting device 10 that transmits a signal and a receiving device 20 that receives a signal from the transmitting device 10 .

ＭＩＭＯ多重化機能を備える送信装置１０は、ＭＩＭＯ多重化時に、複数の送信アンテナ１１から信号を送信する。受信装置２０は、複数の受信アンテナ２１から信号を受信可能に構成される。 A transmitting apparatus 10 having a MIMO multiplexing function transmits signals from a plurality of transmitting antennas 11 during MIMO multiplexing. The receiving device 20 is configured to be able to receive signals from a plurality of receiving antennas 21 .

図２は、無線通信システムにおけるＰＡＰＲの許容値を説明する図である。図２（ａ）は、ＭＩＭＯ多重数が１である場合、すなわち、１つの送信アンテナ１１で信号の送信を行う場合のＰＡＰＲの許容値Ａを説明するものである。ＰＡＰＲの許容値Ａは、送信アンテナ１１からの送信出力Ｐと増幅器のバックオフとの関係から得られる。従来のＦＴＮ伝送においては、ＰＡＰＲがこの許容値Ａを超えることとなってしまう高次の変調方式を用いることができなかった。 FIG. 2 is a diagram for explaining allowable values of PAPR in a wireless communication system. FIG. 2(a) illustrates the allowable value A of PAPR when the MIMO multiplexing number is 1, that is, when signals are transmitted using one transmission antenna 11. FIG. The allowable value A of PAPR is obtained from the relationship between the transmission power P from the transmission antenna 11 and the backoff of the amplifier. In conventional FTN transmission, it was not possible to use a high-order modulation scheme that would cause the PAPR to exceed the allowable value A.

図２（ｂ）は、ＭＩＭＯ多重化時における、すなわち、複数の送信アンテナ１１で信号の送信を行う場合のＰＡＰＲの許容値Ａｔを説明するものである。ＭＩＭＯ多重化時には、各送信アンテナ１１に送信出力が等分配される。ＭＩＭＯ多重化時における各送信アンテナ１１からの平均送信出力Ｐｔは、ＭＩＭＯ多重数をＮｔとして、次式（１）となる。
Ｐｔ＝Ｐ／Ｎｔ （１） FIG. 2(b) explains the allowable value At of PAPR at the time of MIMO multiplexing, that is, when signals are transmitted using a plurality of transmitting antennas 11. In FIG. At the time of MIMO multiplexing, transmission power is equally distributed to each transmission antenna 11 . The average transmission power Pt from each transmission antenna 11 during MIMO multiplexing is given by the following equation (1) where Nt is the number of MIMO multiplexes.
P t =P/N t (1)

上述したように、ＭＩＭＯ多重化時は、各送信アンテナ１１からの送信出力が小さくなるため、許容されるＰＡＰＲは大きくなる。ＭＩＭＯ多重化時におけるＰＡＰＲの許容値Ａｔは、次式（２）となる。
Ａｔ＝Ａ＋１０ｌｏｇ１０（Ｎｔ） （２） As described above, during MIMO multiplexing, the transmission power from each transmission antenna 11 is reduced, so the allowable PAPR is increased. The allowable value At of PAPR during MIMO multiplexing is given by the following equation (2).
A t = A + 10log 10 (N t ) (2)

本開示に係る無線通信システムは、ＭＩＭＯ多重化時に許容されるＰＡＰＲが大きくなることに着目したものである。本開示に係る無線通信システムによれば、従来、ＭＩＭＯ多重化を行わない場合に使用することができなかった高次変調を使用可能とすることができる。 The wireless communication system according to the present disclosure focuses on increasing the PAPR allowed during MIMO multiplexing. According to the radio communication system according to the present disclosure, it is possible to use higher-order modulation, which could not be used conventionally when MIMO multiplexing is not performed.

図１に示すように、本実施の形態に係る送信装置１０は、情報ビット生成部１２と、データ信号変調部１３と、ＦＴＮ処理部１４と、送信信号変換部１５と、制御部１６と、を備える。 As shown in FIG. 1, the transmitting apparatus 10 according to the present embodiment includes an information bit generation section 12, a data signal modulation section 13, an FTN processing section 14, a transmission signal conversion section 15, a control section 16, Prepare.

情報ビット生成部１２は、送信装置１０から受信装置２０に伝送する情報ビットを生成するものである。情報ビット生成部１２は、例えば、誤り訂正符号化機能およびインターリーブ機能等を有していてもよい。 The information bit generator 12 generates information bits to be transmitted from the transmitter 10 to the receiver 20 . The information bit generator 12 may have, for example, an error correction coding function and an interleaving function.

データ信号変調部１３は、情報ビット生成部１２によって生成された情報ビットをデータ信号に変調するものである。変調方式としては、例えば、直交振幅変調（QAM）等が挙げられる。ＭＩＭＯ多重化時において、データ信号変調部１３は、各ストリームに対して変調を施す。 The data signal modulator 13 modulates the information bits generated by the information bit generator 12 into data signals. Modulation schemes include, for example, quadrature amplitude modulation (QAM). At the time of MIMO multiplexing, the data signal modulating section 13 modulates each stream.

ＦＴＮ処理部１４は、データ信号変調部１３によって変調されたデータ信号にＦＴＮ処理を施すものである。送信信号変換部１５は、ＦＴＮ処理部１４によって処理されたデータ信号を送信アンテナ１１から受信装置２０に伝送するための変換を行うものである。 The FTN processing section 14 performs FTN processing on the data signal modulated by the data signal modulation section 13 . The transmission signal conversion unit 15 performs conversion for transmitting the data signal processed by the FTN processing unit 14 from the transmission antenna 11 to the reception device 20 .

制御部１６は、ＭＩＭＯ多重化、ＦＴＮ処理部１４によるＦＴＮ処理、データ信号変調部１３による適応変調、等の各動作を制御するものである、制御部１６は、ＭＩＭＯ多重化時に、データ信号変調部１３による変調方式とＦＴＮ処理部１４によるＦＴＮ効率との組み合わせのうち、ＰＡＰＲがＭＩＭＯ多重数Ｎｔに応じた許容値Ａｔ以下で且つ伝送ビット数が等しい組み合わせから通信品質が最適となる組み合わせを選択する。制御部１６は、当該選択結果に基づいて、データ信号変調部１３とＦＴＮ処理部１４とを制御する。 The control unit 16 controls each operation such as MIMO multiplexing, FTN processing by the FTN processing unit 14, adaptive modulation by the data signal modulation unit 13, and the like. Of the combinations of the modulation scheme by the unit 13 and the FTN efficiency by the FTN processing unit 14, the combination in which the PAPR is equal to or less than the allowable value At according to the MIMO multiplexing number Nt and the number of transmission bits is the same is the combination in which the communication quality is optimal. to select. The control unit 16 controls the data signal modulation unit 13 and the FTN processing unit 14 based on the selection result.

また、本実施の形態に係る受信装置２０は、図１に示すように、受信信号変換部２２と、データ信号復調部２３と、情報ビット検出部２４と、を備える。受信信号変換部２２は、受信アンテナ２１で受信されたデータ信号を、受信装置２０で処理するための変換を行う。データ信号復調部２３は、データ信号を情報ビットとして検出するための復調を行う。情報ビット検出部２４は、情報ビットを検出する。情報ビット検出部２４は、情報ビット生成部１２に合わせて、誤り訂正復号機能およびデインターリーブ機能等を必要に応じて有していてもよい。 Further, the receiving apparatus 20 according to the present embodiment includes a received signal converting section 22, a data signal demodulating section 23, and an information bit detecting section 24, as shown in FIG. The received signal conversion unit 22 converts the data signal received by the receiving antenna 21 for processing by the receiving device 20 . The data signal demodulator 23 performs demodulation for detecting the data signal as information bits. The information bit detector 24 detects information bits. The information bit detection unit 24 may have an error correction decoding function, a deinterleaving function, etc., according to the needs of the information bit generation unit 12 .

図３は、ＦＴＮ効率と変調方式との組み合わせによるＩＳＩおよびＰＡＰＲの例を示すテーブルである。図３（ａ）は、ＭＩＭＯ多重化を行わない場合、すなわち、従来例を示すものである。図３（ａ）の例においては、ＰＡＰＲが許容値Ａを超えてしまう高次の変調方式である２５６ＱＡＭを用いることができない。図３（ａ）の例においては、ＦＴＮ効率を２として、変調方式を１６ＱＡＭとすることで、伝送ビット数８を実現できる。ただし、ＩＳＩが大きくなってしまうという課題がある。 FIG. 3 is a table showing examples of ISI and PAPR according to combinations of FTN efficiencies and modulation schemes. FIG. 3(a) shows a case without MIMO multiplexing, that is, a conventional example. In the example of FIG. 3A, 256QAM, which is a high-order modulation scheme in which the PAPR exceeds the allowable value A, cannot be used. In the example of FIG. 3A, by setting the FTN efficiency to 2 and the modulation method to 16QAM, the transmission bit number of 8 can be realized. However, there is a problem that the ISI increases.

図３（ｂ）は、ＭＩＭＯ多重化を行う場合として、ＭＩＭＯ多重数が２である場合の一例を示すものである。図３（ｂ）の例においては、ＰＡＰＲの許容値Ａｔが許容値Ａよりも大きくなるため、高次の変調方式である２５６ＱＡＭを用いることが可能となる。ＦＴＮ処理をなしとすることで、ＩＳＩを小さく抑えつつ、伝送ビット数１６を実現できる。また、図３（ｂ）の例においては、ＦＴＮ効率を２として、変調方式を１６ＱＡＭとすることによっても、伝送ビット数１６を実現できる。 FIG. 3(b) shows an example of a case where the MIMO multiplexing number is 2 as a case of performing MIMO multiplexing. In the example of FIG. 3(b), since the PAPR allowable value At is larger than the allowable value A, 256QAM , which is a high-order modulation scheme, can be used. By not performing FTN processing, it is possible to realize 16 transmission bits while suppressing ISI. In the example of FIG. 3(b), 16 transmission bits can also be realized by setting the FTN efficiency to 2 and the modulation method to 16QAM.

多値数が大きい高次元の変調方式を用いた場合には、誤り率が大きくなりやすいという課題がある。一方、ＦＴＮ効率を挙げた場合には、ＩＳＩが大きくなってしまうという課題がある。本開示に係る無線通信システムにおいては、多値数を大きくすることに起因する誤り率とＦＴＮ処理によって生じるＩＳＩとのトレードオフを評価して、伝送品質が最適となる組み合わせを選択して適用する。 When using a high-dimensional modulation scheme with a large multilevel number, there is a problem that the error rate tends to increase. On the other hand, when the FTN efficiency is raised, there is a problem that the ISI becomes large. In the wireless communication system according to the present disclosure, the trade-off between the error rate caused by increasing the multilevel number and the ISI caused by the FTN process is evaluated, and the combination that optimizes the transmission quality is selected and applied. .

例えば、図３に示す例においては、２５６ＱＡＭとＦＴＮなしとの組み合わせ、および、１６ＱＡＭとＦＴＮ効率２との組み合わせ、のそれぞれにおける誤り率を、事前に調べてデータとして保持しておく。保持しているデータに基づいて、伝送品質が最適となる組み合わせを選択して適用する。なお、ＦＴＮ効率と変調方式との関係の情報は、例えば、予めシグナルフィールド等に収納しておき、送信装置１０から受信装置２０へ通知される。 For example, in the example shown in FIG. 3, the error rate in each of the combination of 256QAM and no FTN and the combination of 16QAM and FTN efficiency of 2 is checked in advance and stored as data. Based on the held data, a combination that gives the optimum transmission quality is selected and applied. Information on the relationship between the FTN efficiency and the modulation scheme is, for example, stored in advance in a signal field or the like, and notified from the transmitter 10 to the receiver 20 .

以上の実施の形態に示したように構成された送信装置１０およびこの送信装置１０を備える無線通信システムであれば、伝送品質を向上させることができる。なお、図１に示される無線通信システムおよび送信装置１０の各機能は、無線通信方法としても実現することができる。 Transmitting device 10 configured as shown in the above embodiment and a wireless communication system including this transmitting device 10 can improve transmission quality. Note that each function of the wireless communication system and the transmitting device 10 shown in FIG. 1 can also be implemented as a wireless communication method.

１０ 送信装置
１１ 送信アンテナ
１２ 情報ビット生成部
１３ データ信号変調部
１４ ＦＴＮ処理部
１５ 送信信号変換部
１６ 制御部
２０ 受信装置
２１ 受信アンテナ
２２ 受信信号変換部
２３ データ信号復調部
２４ 情報ビット検出部 REFERENCE SIGNS LIST 10 transmission device 11 transmission antenna 12 information bit generation unit 13 data signal modulation unit 14 FTN processing unit 15 transmission signal conversion unit 16 control unit 20 reception device 21 reception antenna 22 reception signal conversion unit 23 data signal demodulation unit 24 information bit detection unit

Claims (3)

ＭＩＭＯ多重化機能と適応変調機能とを備えた送信装置および当該送信装置から信号を受信する受信装置から構成される無線通信システムにおいて、
前記送信装置から前記受信装置に伝送する情報ビットを生成する情報ビット生成部と、
前記情報ビット生成部によって生成された情報ビットをデータ信号に変調するデータ信号変調部と、
前記データ信号変調部によって変調されたデータ信号にＦＴＮ処理を施すＦＴＮ処理部と、
前記ＦＴＮ処理部によって処理されたデータ信号を前記受信装置に対して伝送するための変換を行う送信信号変換部と、
ＭＩＭＯ多重化時に、前記データ信号変調部による変調方式と前記ＦＴＮ処理部によるＦＴＮ効率との組み合わせのうち、ＰＡＰＲがＭＩＭＯ多重数に応じた許容値以下で且つ伝送ビット数が等しい組み合わせから通信品質が最適となる組み合わせを選択し、当該選択結果に基づいて前記データ信号変調部と前記ＦＴＮ処理部とを制御する制御部と、
を備える無線通信システム。 In a wireless communication system comprising a transmitting device having a MIMO multiplexing function and an adaptive modulation function and a receiving device receiving a signal from the transmitting device,
an information bit generation unit that generates information bits to be transmitted from the transmission device to the reception device;
a data signal modulation unit that modulates the information bits generated by the information bit generation unit into a data signal;
an FTN processing unit that performs FTN processing on the data signal modulated by the data signal modulation unit;
a transmission signal conversion unit that converts the data signal processed by the FTN processing unit for transmission to the receiving device;
At the time of MIMO multiplexing, among the combinations of the modulation method by the data signal modulation unit and the FTN efficiency by the FTN processing unit, the communication quality is improved from the combination in which the PAPR is equal to or less than the allowable value according to the number of MIMO multiplexes and the number of transmission bits is the same. a control unit that selects an optimum combination and controls the data signal modulation unit and the FTN processing unit based on the selection result;
A wireless communication system comprising: ＭＩＭＯ多重化機能と適応変調機能とを備えた送信装置および当該送信装置から信号を受信する受信装置が行う無線通信方法において、
前記送信装置から前記受信装置に伝送する情報ビットを生成する情報ビット生成工程と、
前記情報ビット生成工程によって生成された情報ビットをデータ信号に変調するデータ信号変調工程と、
前記データ信号変調工程によって変調されたデータ信号にＦＴＮ処理を施すＦＴＮ処理工程と、
前記ＦＴＮ処理工程によって処理されたデータ信号を前記受信装置に対して伝送するための変換を行う送信信号変換工程と、
ＭＩＭＯ多重化時に、前記データ信号変調工程による変調方式と前記ＦＴＮ処理工程によるＦＴＮ効率との組み合わせのうち、ＰＡＰＲがＭＩＭＯ多重数に応じた許容値以下で且つ伝送ビット数が等しい組み合わせから通信品質が最適となる組み合わせを選択し、当該選択結果に基づいて前記データ信号変調工程と前記ＦＴＮ処理工程とを制御する制御工程と、
を備える無線通信方法。 In a wireless communication method performed by a transmitting device having a MIMO multiplexing function and an adaptive modulation function and a receiving device that receives a signal from the transmitting device,
an information bit generating step of generating information bits to be transmitted from the transmitting device to the receiving device;
a data signal modulating step of modulating the information bits generated by the information bit generating step into a data signal;
an FTN processing step of performing FTN processing on the data signal modulated by the data signal modulating step;
a transmission signal conversion step for converting the data signal processed by the FTN processing step for transmission to the receiving device;
At the time of MIMO multiplexing, out of the combinations of the modulation method by the data signal modulation step and the FTN efficiency by the FTN processing step, the communication quality is improved from the combination in which the PAPR is equal to or less than the allowable value according to the number of MIMO multiplexes and the number of transmission bits is equal. a control step of selecting an optimum combination and controlling the data signal modulation step and the FTN processing step based on the selection result;
A wireless communication method comprising: ＭＩＭＯ多重化機能と適応変調機能とを備えた送信装置において、
受信装置に伝送する情報ビットを生成する情報ビット生成部と、
前記情報ビット生成部によって生成された情報ビットをデータ信号に変調するデータ信号変調部と、
前記データ信号変調部によって変調されたデータ信号にＦＴＮ処理を施すＦＴＮ処理部と、
前記ＦＴＮ処理部によって処理されたデータ信号を前記受信装置に対して伝送するための変換を行う送信信号変換部と、
ＭＩＭＯ多重化時に、前記データ信号変調部による変調方式と前記ＦＴＮ処理部によるＦＴＮ効率との組み合わせのうち、ＰＡＰＲがＭＩＭＯ多重数に応じた許容値以下で且つ伝送ビット数が等しい組み合わせから通信品質が最適となる組み合わせを選択し、当該選択結果に基づいて前記データ信号変調部と前記ＦＴＮ処理部とを制御する制御部と、
を備える送信装置。 In a transmitting device having a MIMO multiplexing function and an adaptive modulation function,
an information bit generator that generates information bits to be transmitted to a receiving device;
a data signal modulation unit that modulates the information bits generated by the information bit generation unit into a data signal;
an FTN processing unit that performs FTN processing on the data signal modulated by the data signal modulation unit;
a transmission signal conversion unit that converts the data signal processed by the FTN processing unit for transmission to the receiving device;
At the time of MIMO multiplexing, among the combinations of the modulation method by the data signal modulation unit and the FTN efficiency by the FTN processing unit, the communication quality is improved from the combination in which the PAPR is equal to or less than the allowable value according to the number of MIMO multiplexes and the number of transmission bits is the same. a control unit that selects an optimum combination and controls the data signal modulation unit and the FTN processing unit based on the selection result;
A transmitting device comprising:
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