JP2016225907A - Device and method for radio relay - Google Patents

Device and method for radio relay Download PDF

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JP2016225907A
JP2016225907A JP2015112219A JP2015112219A JP2016225907A JP 2016225907 A JP2016225907 A JP 2016225907A JP 2015112219 A JP2015112219 A JP 2015112219A JP 2015112219 A JP2015112219 A JP 2015112219A JP 2016225907 A JP2016225907 A JP 2016225907A
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cancellation
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JP6404774B2 (en
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隼人 福園
Hayato Fukusono
隼人 福園
房夫 布
Fusao Nuno
房夫 布
純一 岩谷
Junichi Iwatani
純一 岩谷
文昭 永瀬
Fumiaki Nagase
文昭 永瀬
宏之 中村
Hiroyuki Nakamura
宏之 中村
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Nippon Telegraph and Telephone Corp
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Abstract

PROBLEM TO BE SOLVED: To cancel a sneak signal only by digital signal processing, enabling improved cancellation accuracy by a simple configuration.SOLUTION: A radio relay device includes: analog cancellation means for synthesizing a reception signal with an analog cancellation signal having a sneak component, to perform analog cancellation; and digital cancellation means for performing digital cancellation using a digital cancellation signal having a sneak component which remains in the analog cancellation. The analog cancellation means includes: an analog cancellation response multiplication unit which generates a digital signal for analog cancellation from a relay signal by inverse response multiplication through digital signal processing; a digital/analogue conversion unit which converts the digital signal generated by the analog cancellation response multiplication unit into an analog signal; and an analog transmission signal conversion unit which converts the analog signal into the analog cancellation signal of the radio frequency band.SELECTED DRAWING: Figure 1

Description

本発明は、無線基地局と無線端末局との間で中継処理を行う無線中継装置および無線中継方法に関する。特に、無線基地局の送信と無線中継装置の送信、すなわち無線中継装置における送受信を同一時間および同一周波数で行う全二重中継により、周波数利用効率とスループットを向上させる無線中継装置および無線中継方法に関する。   The present invention relates to a radio relay apparatus and a radio relay method for performing relay processing between a radio base station and a radio terminal station. In particular, the present invention relates to a radio relay apparatus and a radio relay method that improve frequency utilization efficiency and throughput by full-duplex relay in which transmission of a radio base station and transmission of a radio relay apparatus, that is, transmission and reception in the radio relay apparatus are performed at the same time and the same frequency. .

図３は、全二重中継系の構成例を示す。
図３において、無線中継装置は、無線基地局と無線端末局との間で全二重中継を行う構成であり、自身の送信信号が受信される回り込みを抑制するための回り込みキャンセル部がある。回り込みキャンセル部の構成には、回り込み信号をアナログ回路内でキャンセルするアナログキャンセル法と、デジタル回路内でキャンセルするデジタルキャンセル法があり、双方を併用したアナログ／デジタルキャンセル法（非特許文献１）も提案されている。 FIG. 3 shows a configuration example of a full-duplex relay system.
In FIG. 3, the radio relay apparatus is configured to perform full-duplex relay between a radio base station and a radio terminal station, and has a wraparound canceling unit for suppressing wraparound of reception of its own transmission signal. The configuration of the wraparound cancel unit includes an analog cancel method for canceling a sneak signal in an analog circuit and a digital cancel method for canceling in a digital circuit, and an analog / digital cancel method (Non-Patent Document 1) using both of them. Proposed.

図４は、アナログ／デジタルキャンセル法を併用する従来の無線中継装置の構成例を示す。
図４において、無線中継装置１００Ａは、受信アンテナ１０１、アナログ信号合成部１０２、アナログ受信信号変換部１０３、アナログ／デジタル変換部（Ａ／Ｄ）１０４、和算処理部１０５、復調・変調部１０６、デジタル／アナログ変換部（Ｄ／Ａ）１０７、アナログ送信信号変換部１０８、アナログ信号分配部（バラン）１０９、送信アンテナ１１０、アナログ干渉キャンセル回路部１１１、デジタルキャンセル用応答乗算部１１２により構成される。 FIG. 4 shows a configuration example of a conventional wireless relay apparatus that uses the analog / digital cancellation method together.
In FIG. 4, a radio relay apparatus 100A includes a reception antenna 101, an analog signal synthesis unit 102, an analog reception signal conversion unit 103, an analog / digital conversion unit (A / D) 104, a summation processing unit 105, and a demodulation / modulation unit 106. , A digital / analog conversion unit (D / A) 107, an analog transmission signal conversion unit 108, an analog signal distribution unit (balun) 109, a transmission antenna 110, an analog interference cancellation circuit unit 111, and a digital cancellation response multiplication unit 112. The

アナログ信号合成部１０２は、受信アンテナ１０１の受信信号とアナログ干渉キャンセル回路部１１１からのアナログキャンセル信号を合成し、アナログキャンセルを行う。アナログ受信信号変換部１０３は、アナログ受信信号にＲＦ信号処理（フィルタ、増幅、ダウンコンバートなど）を行い、ベースバンド信号に変換する。アナログ／デジタル変換部（Ａ／Ｄ）１０４は、アナログのベースバンド信号をデジタル化する。和算処理部１０５は、受信信号とデジタルキャンセル用応答乗算部１１２からのデジタルキャンセル信号を和算し、デジタルキャンセルを行う。復調・変調部１０６は、再生中継のための信号の復調と変調を行う。デジタル／アナログ変換部（Ｄ／Ａ）１０７は、送信用のデジタルのベースバンド信号をアナログ化する。アナログ送信信号変換部１０８は、アナログベースバンド信号にＲＦ信号処理 (アップコンバート、フィルタ、増幅など) を行い、送信用ＲＦ信号を生成する。   The analog signal synthesis unit 102 synthesizes the reception signal of the reception antenna 101 and the analog cancellation signal from the analog interference cancellation circuit unit 111 to perform analog cancellation. The analog reception signal conversion unit 103 performs RF signal processing (filtering, amplification, down-conversion, etc.) on the analog reception signal and converts it into a baseband signal. An analog / digital conversion unit (A / D) 104 digitizes an analog baseband signal. The summation processing unit 105 sums the received signal and the digital cancellation signal from the digital cancellation response multiplication unit 112 and performs digital cancellation. The demodulation / modulation unit 106 demodulates and modulates a signal for regenerative relay. The digital / analog converter (D / A) 107 converts the digital baseband signal for transmission into analog form. The analog transmission signal converter 108 performs RF signal processing (up-conversion, filter, amplification, etc.) on the analog baseband signal to generate a transmission RF signal.

アナログ干渉キャンセル回路部１１１は、アナログ信号分配部（バラン）１０９で分配された送信用ＲＦ信号からアナログキャンセル信号を生成する。デジタルキャンセル用応答乗算部１１２は、復調・変調部１０６の出力からアナログキャンセルで残留した回り込み成分を有するデジタルキャンセル信号を生成する。   The analog interference cancellation circuit unit 111 generates an analog cancellation signal from the transmission RF signal distributed by the analog signal distribution unit (balun) 109. The digital cancellation response multiplication unit 112 generates a digital cancellation signal having a sneak component remaining due to analog cancellation from the output of the demodulation / modulation unit 106.

M. Jain, et al.,“Practical, Real-time, Full Duplex Wireless, ” Proc., MobiCom 11, 2011.M. Jain, et al., “Practical, Real-time, Full Duplex Wireless,” Proc., MobiCom 11, 2011.

アナログキャンセルを行うアナログ信号分配部（バラン）１０９とアナログ干渉キャンセル回路部１１１では、回り込み信号と所望信号がアナログ／デジタル変換部１０４のダイナミックレンジ内に収まるように処理が行われる。しかし、アナログキャンセルの精度によっては、回り込み信号と所望信号がアナログ／デジタル変換部１０４のダイナミックレンジ内に収まらないことがある。また、精度を向上させるために多段キャンセルをしようとしても、バランの分割損が発生するために困難となる。   In the analog signal distribution unit (balun) 109 and the analog interference cancellation circuit unit 111 that perform analog cancellation, processing is performed so that the sneak signal and the desired signal fall within the dynamic range of the analog / digital conversion unit 104. However, depending on the accuracy of analog cancellation, the sneak signal and the desired signal may not fall within the dynamic range of the analog / digital conversion unit 104. Further, even if an attempt is made to perform multistage cancellation in order to improve the accuracy, it becomes difficult because a balun division loss occurs.

また、図４に示すアナログ／デジタルキャンセル法を併用する構成では、デジタル回路部と別のアナログ干渉キャンセル回路部１１１を設ける必要があり、回路構成が複雑になっている。   Further, in the configuration using the analog / digital cancellation method shown in FIG. 4, it is necessary to provide the analog interference cancellation circuit unit 111 different from the digital circuit unit, and the circuit configuration is complicated.

本発明は、デジタル信号処理のみで回り込み信号のキャンセルを実現し、かつ簡単な構成でキャンセル精度を向上させることができる無線中継装置および無線中継方法を提供することを目的とする。   An object of the present invention is to provide a radio relay apparatus and a radio relay method that can cancel a sneak signal only by digital signal processing and can improve cancellation accuracy with a simple configuration.

第１の発明は、無線基地局と無線端末局との間で全二重中継を行う無線中継装置において、受信信号と、回り込み成分を有するアナログキャンセル信号とを合成してアナログキャンセルを行うアナログキャンセル手段と、アナログキャンセルで残留した回り込み成分を有するデジタルキャンセル信号を用いてデジタルキャンセルを行うデジタルキャンセル手段とを備え、アナログキャンセル手段は、デジタル信号処理により中継信号からアナログキャンセルを行うためのデジタル信号を逆応答乗算して生成するアナログキャンセル用応答乗算部と、該アナログキャンセル用応答乗算部が生成したデジタル信号をアナログ信号に変換するデジタル／アナログ変換部と、該アナログ信号を無線周波数帯のアナログキャンセル信号に変換するアナログ送信信号変換部とを備えた構成である。   A first aspect of the present invention relates to an analog cancel that performs analog cancellation by combining a received signal and an analog cancel signal having a wraparound component in a radio relay apparatus that performs full-duplex relay between a radio base station and a radio terminal station And digital cancellation means for performing digital cancellation using a digital cancellation signal having a sneak component remaining due to analog cancellation. The analog cancellation means outputs a digital signal for performing analog cancellation from a relay signal by digital signal processing. Response cancellation unit for analog cancellation generated by inverse response multiplication, digital / analog conversion unit for converting a digital signal generated by the response multiplication unit for analog cancellation into an analog signal, and analog cancellation of the analog signal in a radio frequency band Analog to convert to signal A configuration in which a transmission signal conversion unit.

第１の発明の無線中継装置において、アナログキャンセル手段は、アナログキャンセル用応答乗算部、デジタル／アナログ変換部、アナログ送信信号変換部を並列に複数段の構成とし、アナログキャンセルを行うためのデジタル信号をそれぞれ逆応答乗算して生成する構成である。   In the wireless relay device of the first invention, the analog canceling means is a digital signal for performing analog cancellation, wherein the analog cancellation response multiplier, the digital / analog converter, and the analog transmission signal converter are configured in a plurality of stages in parallel. Are respectively generated by inverse response multiplication.

第２の発明は、無線基地局と無線端末局との間で全二重中継を行う無線中継方法において、受信信号と、回り込み成分を有するアナログキャンセル信号とを合成してアナログキャンセルを行うアナログキャンセル手段と、アナログキャンセルで残留した回り込み成分を有するデジタルキャンセル信号を用いてデジタルキャンセルを行うデジタルキャンセル手段とを備え、アナログキャンセル手段は、デジタル信号処理により中継信号からアナログキャンセルを行うためのデジタル信号を逆応答乗算して生成し、該デジタル信号をアナログ信号に変換し、該アナログ信号を無線周波数帯のアナログキャンセル信号に変換する処理を行う。   According to a second aspect of the present invention, there is provided a radio relay method for performing full-duplex relay between a radio base station and a radio terminal station, wherein analog cancellation is performed by synthesizing a received signal and an analog cancel signal having a wraparound component. And digital cancellation means for performing digital cancellation using a digital cancellation signal having a sneak component remaining due to analog cancellation. The analog cancellation means outputs a digital signal for performing analog cancellation from a relay signal by digital signal processing. Generated by inverse response multiplication, converts the digital signal into an analog signal, and converts the analog signal into an analog cancel signal in a radio frequency band.

第２の発明の無線中継方法において、アナログキャンセル手段は、デジタル信号処理により中継信号からアナログキャンセルを行うためのデジタル信号を逆応答乗算して生成し、該デジタル信号をアナログ信号に変換し、該アナログ信号を無線周波数帯のアナログキャンセル信号に変換する処理を並列に複数段で実行し、アナログキャンセルを行うためのデジタル信号をそれぞれ逆応答乗算して生成する。   In the wireless relay method of the second invention, the analog cancellation means generates a digital signal for performing analog cancellation from the relay signal by digital signal processing by inverse response multiplication, converts the digital signal to an analog signal, A process of converting an analog signal into an analog cancellation signal in a radio frequency band is executed in parallel in a plurality of stages, and digital signals for performing analog cancellation are respectively generated by inverse response multiplication.

本発明は、デジタル信号処理により回り込み成分を有するアナログキャンセル信号を生成してアナログキャンセルを行い、さらにアナログキャンセルで残留した回り込み成分を有するデジタルキャンセル信号を用いてデジタルキャンセルを行うことにより、デジタル回路のみでアナログキャンセルおよびデジタルキャンセルが可能となる。また、アナログキャンセル手段の多段構成により、簡単な構成でキャンセル精度を向上させることができる。   The present invention generates an analog cancel signal having a wraparound component by digital signal processing, performs analog cancellation, and further performs digital cancellation using a digital cancel signal having a wraparound component remaining by analog cancellation, thereby enabling only a digital circuit. This allows analog and digital cancellation. Further, the cancellation accuracy can be improved with a simple configuration by the multi-stage configuration of the analog cancellation means.

本発明の無線中継装置の実施例１の構成例を示す図である。It is a figure which shows the structural example of Example 1 of the radio relay apparatus of this invention. 本発明の無線中継装置の実施例２の構成例を示す図である。It is a figure which shows the structural example of Example 2 of the radio relay apparatus of this invention. 全二重中継系の構成例を示す図である。It is a figure which shows the structural example of a full-duplex relay system. アナログ／デジタルキャンセル法を併用する従来の無線中継装置の構成例を示す図である。It is a figure which shows the structural example of the conventional wireless relay apparatus which uses an analog / digital cancellation method together.

（実施例１）
図１は、本発明の無線中継装置の実施例１の構成例を示す。
図１において、無線中継装置１００Ｂを構成する受信アンテナ１０１、アナログ信号合成部１０２、アナログ受信信号変換部１０３、アナログ／デジタル変換部（Ａ／Ｄ）１０４、和算処理部１０５、復調・変調部１０６、デジタル／アナログ変換部（Ｄ／Ａ）１０７、アナログ送信信号変換部１０８、送信アンテナ１１０を順次接続し、復調・変調部１０６と和算処理部１０５との間に接続されるデジタルキャンセル用応答乗算部１１２は、図４に示す従来の無線中継装置１００Ａと同様の構成である。 Example 1
FIG. 1 shows a configuration example of Embodiment 1 of the wireless relay device of the present invention.
In FIG. 1, a reception antenna 101, an analog signal synthesis unit 102, an analog reception signal conversion unit 103, an analog / digital conversion unit (A / D) 104, a summation processing unit 105, and a demodulation / modulation unit constituting the wireless relay device 100B. 106, a digital / analog conversion unit (D / A) 107, an analog transmission signal conversion unit 108, and a transmission antenna 110 are connected in sequence, and connected between the demodulation / modulation unit 106 and the summation processing unit 105 for digital cancellation The response multiplier 112 has the same configuration as that of the conventional wireless relay device 100A shown in FIG.

実施例１の無線中継装置１００Ｂの特徴は、復調・変調部１０６の出力を分岐して入力するアナログキャンセル用応答乗算部１２１と、その出力をアナログ信号に変換するデジタル／アナログ変換部（Ｄ／Ａ）１２２と、その出力をアナログ送信信号に変換するアナログ送信信号変換部１２３とを備え、アナログ送信信号変換部１２３から出力されるアナログ信号をアナログ信号合成部１０２にフィードバックする構成である。   The wireless relay device 100B according to the first embodiment is characterized by an analog cancellation response multiplier 121 that branches and inputs the output of the demodulator / modulator 106, and a digital / analog converter (D / A) that converts the output into an analog signal. A) 122 and an analog transmission signal conversion unit 123 that converts the output into an analog transmission signal, and the analog signal output from the analog transmission signal conversion unit 123 is fed back to the analog signal synthesis unit 102.

すなわち、アナログキャンセル用応答乗算部１２１において、復調・変調部１０６の出力からデジタル信号処理によりアナログキャンセル用信号を生成し、Ｄ／Ａ１２２およびアナログ送信信号変換部１２３を介してアナログ信号合成部１０２にフィードバックし、アナログキャンセルを実現する。デジタルキャンセル用応答乗算部１１２は、従来構成と同様に、復調・変調部１０６の出力からアナログキャンセルで残留した回り込み成分を有するデジタルキャンセル信号を生成し、和算処理部１０５にフィードバックしてキャンセルする。   That is, the analog cancellation response multiplication unit 121 generates an analog cancellation signal from the output of the demodulation / modulation unit 106 by digital signal processing, and the analog cancellation signal conversion unit 123 transmits the analog cancellation signal to the analog signal synthesis unit 102. Provide feedback and realize analog cancellation. Similar to the conventional configuration, the digital cancellation response multiplier 112 generates a digital cancellation signal having a sneak component remaining after analog cancellation from the output of the demodulation / modulation unit 106, and feeds back to the summation processing unit 105 for cancellation. .

ここで、アナログ送信信号変換部１０８，１２３の各出力を出力１，出力２とする。アナログ送信信号変換部１０８，１２３の回路応答をＧT1(z)，ＧT2(z)とし、アナログ受信信号変換部１０３の回路応答をＧR(z)とし、回り込み経路の通信路応答をＨF(z)とする。アナログキャンセル用応答乗算部１２１におけるアナログキャンセル後の残留回り込み成分の応答を＾Ｈ2(z)とし、デジタルキャンセル用応答乗算部１１２でデジタルキャンセルするアナログキャンセル後の残留回り込み成分の応答を＾ＨR(z)とする。 Here, the outputs of the analog transmission signal converters 108 and 123 are assumed to be output 1 and output 2, respectively. The circuit responses of the analog transmission signal conversion units 108 and 123 are G T1 (z) and G T2 (z), the circuit response of the analog reception signal conversion unit 103 is G R (z), and the communication path response of the wraparound path is H Let F (z). The response of the residual sneak component after analog cancellation in the analog cancellation response multiplier 121 is represented by ^ H 2 (z), and the response of the residual sneak component after analog cancellation digitally canceled by the digital cancellation response multiplier 112 is ^ H R (z).

復調・変調部１０６は、出力１からトレーニング信号（既知信号）を送出したときの通信路応答を含む応答として
(1) ＧT1(z)ＨF(z)ＧR(z)
を推定する。次に、アナログキャンセル用応答乗算部１２１で＾Ｈ2(z)＝１として、出力２からトレーニング信号を送出したときの応答として
(2) ＧT2(z)ＧR(z)
を推定する。 The demodulation / modulation unit 106 includes a response including a channel response when a training signal (known signal) is transmitted from the output 1.
(1) G T1 (z) H F (z) G R (z)
Is estimated. Next, the response when the training signal is sent from the output 2 with ^ H 2 (z) = 1 in the analog cancellation response multiplier 121 is obtained.
(2) G T2 (z) G R (z)
Is estimated.

次に、応答(1) を応答(2) で割算（逆応答乗算）し、アナログキャンセルする回り込み成分の応答＾Ｈ2(z)として
(3) ＾Ｈ2(z)＝ＧT1(z)ＨF(z)／ＧT2(z)
を推定する。復調・変調部１０６は、アナログキャンセル用応答乗算部１２１に対してアナログキャンセル用応答として−＾Ｈ2(z)を設定する。 Next, the response (1) is divided by the response (2) (inverse response multiplication), and the response ^ H 2 (z) of the wraparound component to be analog canceled
(3) ^ H 2 (z) = G T1 (z) H F (z) / G T2 (z)
Is estimated. The demodulation / modulation unit 106 sets − ^ H 2 (z) as an analog cancellation response to the analog cancellation response multiplication unit 121.

次に、復調・変調部１０６は、出力１，出力２からトレーニング信号を送出してアナログキャンセル後の残留回り込み成分の応答＾ＨR(z)を推定し、デジタルキャンセル用応答乗算部１１２に対してデジタルキャンセル用応答として−＾ＨR(z)を設定する。 Next, the demodulation / modulation unit 106 transmits a training signal from the output 1 and the output 2 to estimate the response ^ H R (z) of the residual sneak component after the analog cancellation, and sends it to the response multiplier 112 for digital cancellation. -^ H R (z) is set as a digital cancel response.

（実施例２）
図２は、本発明の無線中継装置の実施例２の構成例を示す。
実施例２の無線中継装置１００Ｃは、実施例１の１段のアナログキャンセル用応答乗算部１２１で十分なアナログキャンセル精度が得られないときに、アナログキャンセル用応答乗算部１２１を複数Ｎ段用いる構成である。すなわち、アナログキャンセル用応答乗算部１２１−１〜１２１−Ｎと、デジタル／アナログ変換部（Ｄ／Ａ）１２２−１〜１２２−Ｎと、アナログ送信信号変換部１２３−１〜１２３−Ｎが並列に接続される構成となる。 (Example 2)
FIG. 2 shows a configuration example of a second embodiment of the wireless relay device of the present invention.
The radio relay apparatus 100C according to the second embodiment uses a plurality of N stages of analog cancellation response multipliers 121 when sufficient analog cancellation accuracy cannot be obtained by the one stage analog cancellation response multiplier 121 according to the first embodiment. It is. That is, analog cancellation response multipliers 121-1 to 121-N, digital / analog converters (D / A) 122-1 to 122-N, and analog transmission signal converters 123-1 to 123-N are arranged in parallel. It becomes the composition connected to.

アナログキャンセル用応答乗算部１２１−ｎ（ｎは１〜Ｎ）には、アナログキャンセル用応答乗算部１２１−（ｎ−１）までのアナログキャンセル後の残留回り込み成分の応答に対応する−＾Ｈ2n(z) が設定される。 Response multiplication unit 121-n analog cancellation (n is 1 to N) to correspond to the response of the residual echo component after the analog cancellation up for analog cancellation response multiplying unit 121- (n-1) - ^ H 2n (z) is set.

復調・変調部１０６は、出力１と、出力２−１〜２−（ｎ−１）からトレーニング信号を送出したときの応答として
(1) ＧT1(z) (ＨF(z)−＾Ｈ21(z)−…−＾Ｈ2(n-1)(z))ＧR(z)
を推定する。次に、アナログキャンセル用応答乗算部１２１−ｎで＾Ｈ2n(z) ＝１として、出力２−ｎからトレーニング信号を送出したときの応答として
(2) ＧT2n(z)ＧR(z)
を推定する。 The demodulation / modulation unit 106 responds when a training signal is transmitted from the output 1 and the outputs 2-1 to 2- (n-1).
(1) G T1 (z) (H F (z) - ^ H 21 (z) - ... - ^ H 2 (n-1) (z)) G R (z)
Is estimated. Next, the response when the training signal is transmitted from the output 2-n with ^ H 2n (z) = 1 in the analog cancel response multiplier 121-n.
(2) G T2n (z) G R (z)
Is estimated.

次に、応答(1) を応答(2) で割算（逆応答乗算）し、アナログキャンセルする回り込み成分の応答＾Ｈ2n(z) として
(3) ＾Ｈ2n(z) ＝ＧT1(z) (ＨF(z)−＾Ｈ21(z)−…−＾Ｈ2(n-1)(z))／ＧT2(z)
を推定する。復調・変調部１０６は、アナログキャンセル用応答乗算部１２１−ｎに対してアナログキャンセルする回り込み成分の応答として−＾Ｈ2n(z) を設定する。 Next, the response (1) is divided by the response (2) (inverse response multiplication), and the response ^ H 2n (z) of the wraparound component to be analog canceled
(3) ^ H 2n (z ) = G T1 (z) (H F (z) - ^ H 21 (z) - ... - ^ H 2 (n-1) (z)) / G T2 (z)
Is estimated. The demodulation / modulation unit 106 sets − ^ H 2n (z) as a response of the sneak component to be analog canceled with respect to the analog cancellation response multiplication unit 121-n.

次に、復調・変調部１０６は、出力１，出力２−１〜出力２−Ｎからトレーニング信号を送出してアナログキャンセル後の残留回り込み成分の応答＾ＨR(z)を推定し、デジタルキャンセル用応答乗算部１１２に対してデジタルキャンセル用応答として−＾ＨR(z)を設定する。 Next, the demodulation / modulation unit 106 estimates the response ^ H R (z) of the residual sneak component after analog cancellation by sending a training signal from the output 1, output 2-1 to output 2-N, and performs digital cancellation -^ H R (z) is set as a response for digital cancellation to the response multiplier 112.

１００Ａ，１００Ｂ，１００Ｃ 無線中継装置
１０１ 受信アンテナ
１０２ アナログ信号合成部
１０３ アナログ受信信号変換部
１０４ アナログ／デジタル変換部（Ａ／Ｄ）
１０５ 和算処理部
１０６ 復調・変調部
１０７ デジタル／アナログ変換部（Ｄ／Ａ）
１０８ アナログ送信信号変換部
１０９ アナログ信号分配部（バラン）
１１０ 送信アンテナ
１１１ アナログ干渉キャンセル回路部
１１２ デジタルキャンセル用応答乗算部
１２１ アナログキャンセル用応答乗算部
１２２ デジタル／アナログ変換部（Ｄ／Ａ）
１２３ アナログ送信信号変換部 100A, 100B, 100C Wireless relay device 101 Reception antenna 102 Analog signal synthesis unit 103 Analog reception signal conversion unit 104 Analog / digital conversion unit (A / D)
105 Summation Processing Unit 106 Demodulation / Modulation Unit 107 Digital / Analog Conversion Unit (D / A)
108 Analog transmission signal converter 109 Analog signal distributor (balun)
DESCRIPTION OF SYMBOLS 110 Transmission antenna 111 Analog interference cancellation circuit part 112 Digital response response multiplication part 121 Analog cancellation response multiplication part 122 Digital / analog conversion part (D / A)
123 Analog transmission signal converter

Claims (4)

無線基地局と無線端末局との間で全二重中継を行う無線中継装置において、
受信信号と、回り込み成分を有するアナログキャンセル信号とを合成してアナログキャンセルを行うアナログキャンセル手段と、
前記アナログキャンセルで残留した回り込み成分を有するデジタルキャンセル信号を用いてデジタルキャンセルを行うデジタルキャンセル手段と
を備え、
前記アナログキャンセル手段は、デジタル信号処理により中継信号から前記アナログキャンセルを行うためのデジタル信号を逆応答乗算して生成するアナログキャンセル用応答乗算部と、該アナログキャンセル用応答乗算部が生成したデジタル信号をアナログ信号に変換するデジタル／アナログ変換部と、該アナログ信号を無線周波数帯の前記アナログキャンセル信号に変換するアナログ送信信号変換部とを備えた構成である
ことを特徴とする無線中継装置。 In a wireless relay device that performs full-duplex relay between a wireless base station and a wireless terminal station,
Analog cancellation means for performing analog cancellation by synthesizing the received signal and an analog cancellation signal having a wraparound component;
Digital cancellation means for performing digital cancellation using a digital cancellation signal having a sneak component remaining in the analog cancellation, and
The analog cancellation means includes an analog cancellation response multiplier that generates a digital signal for performing the analog cancellation from a relay signal by digital signal processing by inverse response multiplication, and a digital signal generated by the analog cancellation response multiplier A wireless relay device comprising: a digital / analog conversion unit that converts the analog signal into an analog signal; and an analog transmission signal conversion unit that converts the analog signal into the analog cancellation signal in a radio frequency band. 請求項１に記載の無線中継装置において、
前記アナログキャンセル手段は、前記アナログキャンセル用応答乗算部、前記デジタル／アナログ変換部、前記アナログ送信信号変換部を並列に複数段の構成とし、前記アナログキャンセルを行うためのデジタル信号をそれぞれ逆応答乗算して生成する構成である
ことを特徴とする無線中継装置。 The wireless relay device according to claim 1,
The analog cancellation means comprises a plurality of stages of the analog cancellation response multiplier, the digital / analog converter, and the analog transmission signal converter in parallel, and each of the digital signals for performing the analog cancellation is subjected to inverse response multiplication. A wireless relay device characterized in that the wireless relay device is configured to generate the 無線基地局と無線端末局との間で全二重中継を行う無線中継方法において、
受信信号と、回り込み成分を有するアナログキャンセル信号とを合成してアナログキャンセルを行うアナログキャンセル手段と、
前記アナログキャンセルで残留した回り込み成分を有するデジタルキャンセル信号を用いてデジタルキャンセルを行うデジタルキャンセル手段と
を備え、
前記アナログキャンセル手段は、デジタル信号処理により中継信号から前記アナログキャンセルを行うためのデジタル信号を逆応答乗算して生成し、該デジタル信号をアナログ信号に変換し、該アナログ信号を無線周波数帯の前記アナログキャンセル信号に変換する処理を行う
ことを特徴とする無線中継方法。 In a wireless relay method for performing full-duplex relay between a wireless base station and a wireless terminal station,
Analog cancellation means for performing analog cancellation by synthesizing the received signal and an analog cancellation signal having a wraparound component;
Digital cancellation means for performing digital cancellation using a digital cancellation signal having a sneak component remaining in the analog cancellation, and
The analog cancellation means generates a digital signal for performing the analog cancellation from the relay signal by digital signal processing by inverse response multiplication, converts the digital signal to an analog signal, and converts the analog signal to the radio frequency band A wireless relay method characterized by performing processing for conversion to an analog cancel signal. 請求項３に記載の無線中継方法において、
前記アナログキャンセル手段は、デジタル信号処理により中継信号から前記アナログキャンセルを行うためのデジタル信号を逆応答乗算して生成し、該デジタル信号をアナログ信号に変換し、該アナログ信号を無線周波数帯の前記アナログキャンセル信号に変換する処理を並列に複数段で実行し、前記アナログキャンセルを行うためのデジタル信号をそれぞれ逆応答乗算して生成する
ことを特徴とする無線中継方法。 The wireless relay method according to claim 3,
The analog cancellation means generates a digital signal for performing the analog cancellation from the relay signal by digital signal processing by inverse response multiplication, converts the digital signal to an analog signal, and converts the analog signal to the radio frequency band A radio relay method comprising: performing a process of converting to an analog cancel signal in a plurality of stages in parallel, and generating a digital signal for performing the analog cancel by inverse response multiplication, respectively.
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Publication number Priority date Publication date Assignee Title
JPH09284195A (en) * 1996-04-19 1997-10-31 Kokusai Electric Co Ltd Radio relay booster
JPH11145886A (en) * 1997-11-10 1999-05-28 Kokusai Electric Co Ltd Reproducing/repeating device
JP2003174392A (en) * 2001-12-06 2003-06-20 Mitsubishi Electric Corp Radio repeater

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