WO2012029932A1 - Dispositif de transmission, procédé de transmission, dispositif terminal et procédé de montage - Google Patents

Dispositif de transmission, procédé de transmission, dispositif terminal et procédé de montage Download PDF

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Publication number
WO2012029932A1
WO2012029932A1 PCT/JP2011/069966 JP2011069966W WO2012029932A1 WO 2012029932 A1 WO2012029932 A1 WO 2012029932A1 JP 2011069966 W JP2011069966 W JP 2011069966W WO 2012029932 A1 WO2012029932 A1 WO 2012029932A1
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Prior art keywords
signal
frequency
occupied bandwidth
transmission
processing
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PCT/JP2011/069966
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English (en)
Japanese (ja)
Inventor
丸橋　建一
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日本電気株式会社
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Publication date
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Priority to JP2012531971A priority Critical patent/JPWO2012029932A1/ja
Publication of WO2012029932A1 publication Critical patent/WO2012029932A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion

Definitions

  • the present invention relates to a transmission device, a transmission method, a terminal device, and a mounting method.
  • millimeter wave band wireless communication As a high-speed wireless communication technology, millimeter wave band wireless communication is known. For example, as described in Non-Patent Document 1, millimeter wave wireless communication achieves a transmission rate of several Gbit / s by using a channel with a width of 2 GHz.
  • the millimeter wave band RF (Radio Frequency) signal is assigned to a frequency band of 57 GHz to 66 GHz, for example.
  • an RF (Radio Frequency) signal is generated using a quadrature modulator, the occupied bandwidth of the baseband signal is about 1 GHz per channel.
  • the occupied bandwidth of the IF signal is substantially the same as the occupied bandwidth of the RF signal, and is about 2 GHz per channel.
  • feeder power feeding
  • measures are taken such as supplying power with a wiring as short as possible (Non-Patent Document 2) or mounting an IC on which a wireless circuit is integrated on the back surface of the antenna substrate (Non-Patent Document 3).
  • the millimeter-wave wireless device is mounted on, for example, a notebook computer including a main body including a keyboard and a display including a display.
  • FIG. 11 shows an example of mounting a superheterodyne wireless device on a notebook computer.
  • the wireless device includes at least a baseband circuit, an RF front end, and an antenna.
  • the baseband circuit is mounted on the main body, while the RF front end and antenna having a function of converting to millimeter waves are mounted on the display.
  • FIG. 9 is a graph showing an example of loss characteristics of a fine coaxial cable with a connector. As can be seen from FIG. 9, the loss of the coaxial cable gradually increases as the frequency increases and rapidly increases when the frequency exceeds a predetermined frequency.
  • FIG. 10 is a graph showing the relationship between coaxial cable loss and signal frequency arrangement.
  • the loss characteristic of the coaxial cable in FIG. 10 is assumed to be equal to the loss characteristic shown in FIG. Basically, the in-band deviation ⁇ f1 of a signal with a wide occupied bandwidth is larger than the in-band deviation of a signal with a narrow occupied bandwidth.
  • a signal with a wide occupied bandwidth is, for example, a millimeter wave IF signal having a maximum occupied bandwidth of 2 GHz and transmitted in the 9-14 GHz band.
  • a signal having a narrow occupied bandwidth is, for example, a microwave RF signal having an occupied bandwidth of 20 MHz or 40 MHz and transmitted in a 2.4 GHz or 5 GHz band.
  • An object of the present invention is to provide a transmission device, a transmission method, a terminal device, and a mounting method for solving the problem of reducing in-band deviation, which is more problematic in broadband transmission.
  • the transmission apparatus of the present invention includes first processing means for performing baseband processing of a first signal having a first occupied bandwidth, second processing means for performing RF (Radio Frequency) processing of the first signal, and first processing. And a cable connecting the second processing means and the first signal and a second signal having a second occupied bandwidth that is narrower than the first occupied bandwidth, for transmission in the cable, The transmission frequency of the first signal is lower than the transmission frequency of the second signal.
  • the transmission method of the present invention includes a first processing unit that performs baseband processing of a first signal having a first occupied bandwidth and a second processing unit that performs RF processing of the first signal, which are connected via a cable.
  • the transmission frequency of the first signal is: The frequency is lower than the transmission frequency of the second signal.
  • the terminal device of the present invention is mounted with a main body portion on which a first processing circuit that performs baseband processing of a first signal having a first occupied bandwidth is mounted, and a second processing circuit that performs RF processing on the first signal. And a cable for connecting the first processing circuit and the second processing circuit, and the first signal and the second signal having a second occupied bandwidth narrower than the first occupied bandwidth in the cable.
  • the transmission frequency of the first signal is set to be lower than the transmission frequency of the second signal.
  • a wireless circuit including a first processing circuit that performs baseband processing of a first signal having a first occupied bandwidth and a second processing circuit that performs RF processing of the first signal is provided as a terminal device.
  • the first processing circuit is mounted on the main body of the terminal device, the second processing circuit is mounted on the display unit of the terminal device, and the first processing circuit and the second processing circuit are mounted.
  • the transmission frequency of the first signal is set to the second signal. The frequency is lower than the transmission frequency.
  • FIG. 1 is a block diagram illustrating a configuration example of a transmission apparatus 20 according to the first embodiment of the present invention.
  • the transmission device 20 includes a first processing unit 22 and a second processing unit 24.
  • the first processing unit 22 and the second processing unit 24 are connected by a cable 26.
  • the first processing unit 22 is mounted on the main body unit 32 of the terminal device 30, and the second processing unit 24 is mounted on the display unit 34.
  • the first processing unit 22 executes at least baseband processing of the first signal having the first occupied bandwidth.
  • the second processing unit 24 executes at least RF (Radio Frequency) processing of the first signal.
  • RF Radio Frequency
  • the first signal may be a signal used for, for example, millimeter-wave wireless communication
  • the second signal may be a wireless LAN (Local Area Network) signal, for example.
  • the cable 26 can be a coaxial cable, for example.
  • the transmission frequency of the first signal is set to the second signal.
  • the frequency is lower than the transmission frequency.
  • the cable 26 is, for example, a fine coaxial cable (for example, a coaxial cable having a low-profile connector), as described with reference to FIG. 9, the increase rate of the loss of the fine coaxial cable is When the frequency exceeds a predetermined frequency, it rapidly increases.
  • FIG. 2 is a block diagram illustrating a configuration example of a radio apparatus (transmission apparatus) according to the second embodiment of the present invention.
  • the main body 1 includes a baseband circuit 4a that handles a signal with a small occupied bandwidth (for example, a wireless LAN signal), a modulator / demodulator 5a, and an RF front end 6a.
  • the main unit 1 further includes a baseband circuit 4b that handles a signal with a wide occupied bandwidth (a signal used for millimeter-wave wireless communication), a modem 5b, and a duplexer 7.
  • the display unit 2 includes a duplexer 8, an RF front end 6b for millimeter waves, an antenna 9a (first antenna), and an antenna 9b (second antenna).
  • the duplexer 7 of the main unit 1 and the duplexer 8 of the display unit 2 are connected via a coaxial cable 10 (cable).
  • the duplexer 7 of the main body 1 superimposes the RF output signal from the RF front end 6a and the IF output signal from the modem 5b on one signal. Then, the duplexer 7 transmits the superimposed signal to the duplexer 8 of the display unit 2 through the coaxial cable 10.
  • the duplexer 8 separates the RF output signal and the IF output signal from the superimposed signal.
  • the RF output signal is transmitted from the antenna 9a.
  • the IF output signal is up-converted to an RF output signal by the millimeter wave RF front end 6b and transmitted from the antenna 9b.
  • the RF output signal from the RF front end 6a is, for example, the 2.4 GHz band or the 5 GHz band.
  • the IF output signal output from the modem 5b is a signal lower than 2.4 GHz, for example, up to 2 GHz.
  • the IF output signal with a wide occupied bandwidth (for example, 2 GHz / 1 channel) has a low frequency
  • the 2.4 GHz band and the 5 GHz band with a small occupied bandwidth have a high frequency (for example, 20 MHz or 40 MHz).
  • the signal is transmitted through the coaxial cable 10.
  • FIG. 7 is a graph showing the relationship between the coaxial cable loss and the signal frequency arrangement in the second embodiment.
  • the loss characteristics of the coaxial cables of FIGS. 7 and 10 are equal.
  • the in-band deviation ⁇ f2 shown in FIG. 7 is significantly smaller than the in-band deviation ⁇ f1 shown in FIG. The reason will be described.
  • the increase rate of the loss of a fine coaxial cable increases rapidly when a predetermined frequency is exceeded. Accordingly, a signal having a wide occupied bandwidth is transmitted at a frequency lower than the in-band deviation ⁇ f1 (see FIG.
  • a signal with a wide occupied bandwidth and “a signal with a narrow occupied bandwidth” mean that the occupied bandwidth of one signal is the other. It means that it is "relatively” wider (or narrower) than the occupied bandwidth of the signal.
  • the occupied bandwidth of the signal satisfies this condition, and the specific occupied bandwidth of each signal is not limited to the above.
  • the frequency of the signal satisfies this condition, and the specific frequency of each signal is not limited to the above.
  • a case where a signal with a large occupied bandwidth is transmitted at a frequency lower than a frequency at which a signal with a small occupied bandwidth is transmitted is described as an example, but the present invention is not limited to this.
  • FIG. 3 is a block diagram illustrating a configuration example of a radio apparatus (transmission apparatus) according to the third embodiment of the present invention.
  • a terminal device for example, a notebook personal computer
  • FIG. 3 shows a case where this wireless device is applied to a terminal device (for example, a notebook personal computer) composed of, for example, a main body 1 and a display 2.
  • the main body 1 includes a baseband circuit 4c and a modem 5c.
  • the display unit 2 includes a duplexer 8, an RF front end 6a, an RF front end 6b for millimeter waves, an antenna 9a, and an antenna 9b.
  • the modem 5 c of the main body 1 and the duplexer 8 of the display unit 2 are connected via a coaxial cable 10.
  • the baseband circuit 4c outputs a baseband signal of a signal with a narrow occupied bandwidth and a signal with a wide occupied bandwidth to the modem 5c.
  • a signal with a small occupied bandwidth is, for example, a wireless LAN signal
  • a signal with a large occupied bandwidth is, for example, a signal used for millimeter-wave wireless communication.
  • the baseband circuit 4c when the interface between the baseband circuit 4c and the modem 5c is one, the baseband circuit 4c outputs both baseband signals in a time division manner.
  • the modem 5c outputs an IF output signal including an IF signal having a narrow occupied bandwidth and an IF signal having a wide occupied bandwidth.
  • the frequency of the IF signal of the signal having a narrow occupied bandwidth is set higher than the frequency of the IF signal of the signal having a wide occupied bandwidth.
  • the IF output signal is transmitted to the duplexer 8 mounted on the display unit 2 via the coaxial cable 10.
  • the IF output signal is separated by the duplexer 8 according to the frequency.
  • the IF output signal having a narrow occupied bandwidth is up-converted to an RF signal by the RF front end 6a and transmitted by the antenna 9a.
  • the IF output signal having a wide occupied bandwidth is up-converted to an RF signal by the millimeter wave RF front end 6b and transmitted by the antenna 9b.
  • the reason why the in-band deviation can be reduced is the same as in the second embodiment, and thus the description thereof is omitted here.
  • the configuration can be simplified.
  • the modem 5c has a function of changing the frequency from the baseband signal to the IF signal as described above with respect to a signal having a small occupied bandwidth.
  • the modem 5c may generate the RF signal directly from the baseband signal without generating the IF signal. That is, the direct conversion method can be supported.
  • FIG. 4 is a block diagram illustrating a configuration example of a radio apparatus (transmission apparatus) according to the fourth embodiment of the present invention.
  • FIG. 4 is a block diagram illustrating a configuration example of a radio apparatus (transmission apparatus) according to the fourth embodiment of the present invention.
  • the main unit 1 is used for a baseband circuit 4a that handles a signal with a small occupied bandwidth (for example, a wireless LAN signal), a modem 5a, an RF front end 6a, and a signal with a large occupied bandwidth (for example, millimeter-wave radio).
  • a baseband circuit 4b for handling signals and a duplexer 7.
  • the display unit 2 includes a duplexer 8, a modem 5b, a millimeter wave RF front end 6b, an antenna 9a, and an antenna 9b.
  • the duplexer 7 of the main body 1 and the duplexer 8 of the display unit 2 are connected via a coaxial cable 10.
  • the duplexer 7 of the main body 1 superimposes the RF output signal from the RF front end 6a and the baseband output signal from the baseband circuit 4b.
  • the duplexer 7 transmits the superimposed signal to the duplexer 8 of the display unit 2 through the coaxial cable 10.
  • the RF output signal separated by the duplexer 8 is transmitted by the antenna 9a.
  • the baseband output signal separated by the duplexer 8 is up-converted by the millimeter wave RF front end 6b via the modulator / demodulator 5b and transmitted by the antenna 9b.
  • the RF output signal from the RF front end 6a is, for example, the 2.4 GHz band or the 5 GHz band.
  • the baseband output signal output from the baseband circuit 4b is a signal lower than 2.4 GHz, for example, up to 2 GHz.
  • baseband output signals with a large occupied bandwidth eg 2 GHz
  • 2.4 GHz and 5 GHz band RF output signals with a narrow occupied bandwidth eg 20 MHz or 40 MHz
  • the RF frequency of the wireless LAN is the upper limit for the frequency that passes through the coaxial cable, there is no need to select a special coaxial cable even if it is shared with the baseband signal of millimeter wave radio. It can also contribute to cost reduction. Therefore, according to the fourth embodiment, as in the second and third embodiments, it is possible to reduce the in-band deviation which is more problematic in wideband transmission. In the fourth embodiment, the reason why the in-band deviation can be reduced is the same as that in the second embodiment, and thus the description thereof is omitted here. Furthermore, according to the fourth embodiment, not only the IF signal but also the baseband signal can be sent by the coaxial cable, so that the selection range can be further expanded.
  • FIG. 5 is a block diagram illustrating a configuration example of a radio apparatus (transmission apparatus) according to the fifth embodiment of the present invention.
  • FIG. 5 shows a case where this wireless device is applied to a terminal device (for example, a notebook computer) composed of, for example, the main body 1 and the display 2.
  • the main body 1 includes a baseband circuit 4a that handles a signal with a small occupied bandwidth (for example, a wireless LAN signal), a modulator / demodulator 5a, and an RF front end 6a.
  • the main body 1 further includes a baseband circuit 4b that handles a signal with a wide occupied bandwidth (for example, a signal used for millimeter wave radio), a duplexer 7-1, and a duplexer 7-2.
  • the display unit 2 includes a duplexer 8-1, a duplexer 8-2, a modem 5b, a millimeter wave RF front end 6b, antennas 9a-1, 9a-2, and an antenna 9b. .
  • the duplexer 7-1 of the main body 1 and the duplexer 8-1 of the display unit 2 are connected via a coaxial cable 10-1.
  • the duplexer 7-2 of the main body 1 and the duplexer 8-2 of the display unit 2 are connected via a coaxial cable 10-2.
  • the wireless LAN corresponds to MIMO (Multiple Input Multiple Output). Therefore, the RF output signal from the RF front end 6a is divided into channel 1 (Ch1) and channel 2 (Ch2).
  • the baseband signal from the baseband circuit 4b is divided into orthogonal signals Ich and Qch. Ch1 and Ich are superimposed by the duplexer 7-1. This superimposed signal is transmitted to the duplexer 8-1 of the display unit 2 through the coaxial cable 10-1.
  • Ch2 and Qch are superimposed by the duplexer 7-2.
  • This superimposed signal is transmitted to the duplexer 8-2 of the display unit 2 through the coaxial cable 10-2.
  • the RF signals (Ch1, Ch2) separated by the duplexers 8-1, 8-2 are transmitted to the antennas 9a-1, 9a-2, respectively.
  • the baseband signals (Ich, Qch) are respectively modulated by the modem 5b, up-converted by the RF front end 6b, and transmitted by the antenna 9b.
  • the RF output signal from the RF front end 6a is, for example, the 2.4 GHz band or the 5 GHz band.
  • the baseband output signal output from the baseband circuit 4b is a signal lower than 2.4 GHz, for example, up to 1 GHz.
  • the occupied bandwidth of the signal used for millimeter-wave radio is about half of the occupied bandwidth of the second to fourth embodiments.
  • FIG. 8 is a graph showing the relationship between the coaxial cable loss and the signal frequency arrangement in the fifth embodiment.
  • FIG. 8 and FIG. 7 are compared. In this case, it is assumed that the loss characteristics of the coaxial cables of FIGS. 8 and 7 are equal.
  • the orthogonal signal has approximately half the occupied bandwidth (for example, 2 GHz ⁇ 1 GHz) compared to the RF signal and IF signal. Therefore, the in-band deviation ⁇ f3 shown in FIG. 8 is also smaller than the in-band deviation ⁇ f2 shown in FIG.
  • the in-band deviation can be further reduced.
  • the operation at the time of transmission is taken as an example, but at the time of reception, the signal is transmitted in the reverse direction.
  • the number of RF signals (number of channels) output from the RF front end 6a (or input to the RF front end 6a) is not fixed but varies depending on the MIMO specification.
  • the number of baseband signals output from the baseband circuit 4b (or input to the baseband circuit 4b) is not fixed, but varies depending on specifications such as when differential wiring is used or when transmission / reception wiring is used. Therefore, the number of the coaxial cables 10 and whether a part or all of the coaxial cables are shared are design matters and can be arbitrarily changed.
  • FIG. 6 is a block diagram illustrating a configuration example of a radio apparatus (transmission apparatus) according to the sixth embodiment of the present invention.
  • FIG. 6 shows a case where this wireless apparatus is applied to, for example, an information terminal (for example, a notebook computer) composed of a main body 1 and a display 2.
  • the sixth embodiment is different from the fifth embodiment (see FIG. 5) in the configuration of the display unit 2.
  • the quadrature signals Ich and Qch output from the duplexers 8-1 and 8-2 are divided into two systems of modulators / demodulators 5b-1 and 5b-2, and the RF front end. Modulated and up-converted by 6b-1 and 6b-2, and output by antennas 9b-1 and 9b-2.
  • the configuration of the main body 1 is the same as that of the fifth embodiment. According to the sixth embodiment, as in the second to fifth embodiments described above, since a signal having a wide occupied bandwidth is transmitted at a low frequency, the in-band deviation more problematic in wideband transmission. Can be reduced.
  • the in-band deviation can be further reduced.
  • the set of the RF front end 6b-1 and the antenna 9b-1 and the set of the RF front end 6b-2 and the antenna 9b-2 are separated in the display unit 2. Can be installed. Accordingly, it is possible to obtain shielding and diversity effect in the communication path. Furthermore, in such a configuration, it is not necessary to draw a signal at a high frequency such as millimeter waves.
  • the operation at the time of transmission is taken as an example, but at the time of reception, the signal is transmitted in the reverse direction.
  • the number of RF signals (number of channels) output from the RF front end 6a (or input to the RF front end 6a) is not fixed but varies depending on the MIMO specification.
  • the number of baseband signals output from the baseband circuit 4b (or input to the baseband circuit 4b) is not fixed, but varies depending on specifications such as when differential wiring is used or when transmission / reception wiring is used. That is, the number of the coaxial cables 10 and whether a part or all of the coaxial cables are shared are design matters and can be arbitrarily changed.
  • the wireless devices according to the second to sixth embodiments described above are not limited to notebook computers, but can be applied to other devices (for example, cellular phones and PDAs (Personal Digital Assistants)). Not too long.
  • the present invention has been described with reference to the embodiments, the present invention is not limited to the above-described embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2010-195369 for which it applied on September 1, 2010, and takes in those the indications of all here.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)

Abstract

Afin de réduire l'écart intrabande qui constitue un problème important dans les transmissions sur large bande, le dispositif de transmission de l'invention comprend: des premiers moyens de traitement qui mettent en œuvre un traitement en bande de base sur un premier signal présentant une première largeur de bande occupée; des deuxièmes moyens de traitement qui mettent en œuvre un traitement radiofréquence (RF) sur le premier signal; et un câble, qui relie les premiers moyens de traitement et les deuxièmes moyens de traitement. Quand un premier signal et un deuxième signal présentant une deuxième largeur de bande occupée, plus étroite que la première largeur de bande occupée, sont transmis dans un câble utilisé en commun, la fréquence de transmission du premier signal est rendue inférieure à la fréquence de transmission du deuxième signal.
PCT/JP2011/069966 2010-09-01 2011-08-26 Dispositif de transmission, procédé de transmission, dispositif terminal et procédé de montage WO2012029932A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012531971A JPWO2012029932A1 (ja) 2010-09-01 2011-08-26 伝送装置、伝送方法、端末装置、および実装方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-195369 2010-09-01
JP2010195369 2010-09-01

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WO2012029932A1 true WO2012029932A1 (fr) 2012-03-08

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Cited By (1)

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JP2021523646A (ja) * 2018-05-18 2021-09-02 ナンヤン テクノロジカル ユニヴァーシティー 無線通信のための装置及び方法

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JP2000022574A (ja) * 1998-07-06 2000-01-21 Sony Corp 衛星放送受信装置と衛星放送受信方法
JP2001267948A (ja) * 2001-02-06 2001-09-28 Dx Antenna Co Ltd 衛星信号伝送システム
JP2002199389A (ja) * 2000-10-18 2002-07-12 Maspro Denkoh Corp ダウンコンバータ、アップコンバータ及びｃａｔｖシステム
JP2009206996A (ja) * 2008-02-28 2009-09-10 Toshiba Corp 情報処理装置

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JP2001036427A (ja) * 1999-07-15 2001-02-09 Alps Electric Co Ltd Ｅｔｃ用車載送受信器
KR100703779B1 (ko) * 2005-05-19 2007-04-06 삼성전자주식회사 Ｃａｔｖ 방송 신호 수신용 선로를 통하여 유선 단일 밴드직교주파수분할다중 방식 기반 초광대역 신호를 전송하기위한 시스템 및 방법
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JP2000022574A (ja) * 1998-07-06 2000-01-21 Sony Corp 衛星放送受信装置と衛星放送受信方法
JP2002199389A (ja) * 2000-10-18 2002-07-12 Maspro Denkoh Corp ダウンコンバータ、アップコンバータ及びｃａｔｖシステム
JP2001267948A (ja) * 2001-02-06 2001-09-28 Dx Antenna Co Ltd 衛星信号伝送システム
JP2009206996A (ja) * 2008-02-28 2009-09-10 Toshiba Corp 情報処理装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021523646A (ja) * 2018-05-18 2021-09-02 ナンヤン テクノロジカル ユニヴァーシティー 無線通信のための装置及び方法
JP7178427B2 (ja) 2018-05-18 2022-11-25 ナンヤン テクノロジカル ユニヴァーシティー 無線通信のための装置及び方法

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