WO2011070949A1 - 無線通信装置 - Google Patents

無線通信装置 Download PDF

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Publication number
WO2011070949A1
WO2011070949A1 PCT/JP2010/071449 JP2010071449W WO2011070949A1 WO 2011070949 A1 WO2011070949 A1 WO 2011070949A1 JP 2010071449 W JP2010071449 W JP 2010071449W WO 2011070949 A1 WO2011070949 A1 WO 2011070949A1
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WO
WIPO (PCT)
Prior art keywords
reception
transmission
modulated
signal
filter
Prior art date
Application number
PCT/JP2010/071449
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English (en)
French (fr)
Japanese (ja)
Inventor
慎也 岡
隆 岡田
Original Assignee
株式会社エヌ・ティ・ティ・ドコモ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 株式会社エヌ・ティ・ティ・ドコモ filed Critical 株式会社エヌ・ティ・ティ・ドコモ
Priority to CN201080055397.4A priority Critical patent/CN102648586B/zh
Priority to EP10835871.4A priority patent/EP2512038B1/en
Priority to US13/514,327 priority patent/US8983401B2/en
Publication of WO2011070949A1 publication Critical patent/WO2011070949A1/ja

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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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line

Definitions

  • the present invention relates to a wireless communication apparatus in a wireless communication system that performs communication using Frequency Division Duplex (FDD), and more particularly to a wireless communication apparatus that performs communication using MIMO (Multiple Input / Multiple Output).
  • FDD Frequency Division Duplex
  • MIMO Multiple Input / Multiple Output
  • a radio communication apparatus transmits a transmission filter that transmits a transmission antenna and a transmission frequency band, and a reception filter that transmits a reception antenna and a reception frequency band. is required.
  • the radio communication apparatus when applying MIMO that uses a plurality of radio transmission lines simultaneously in parallel and uses a plurality of radio reception lines simultaneously in parallel, the radio communication apparatus has a transmission antenna and a transmission frequency band. Transmission filters for transmission are required for the number of transmission lines, and reception filters for transmitting the reception antenna and reception frequency band are required for the number of reception lines.
  • Patent Document 1 discloses a multiband wireless communication apparatus including a plurality of antennas, a plurality of filters, a plurality of duplexers (antenna duplexers), a modulation circuit, and a demodulation circuit.
  • a multiband wireless communication apparatus including a plurality of antennas, a plurality of filters, a plurality of duplexers (antenna duplexers), a modulation circuit, and a demodulation circuit.
  • the duplexer connected to the transmission circuit and the reception circuit is connected to one antenna, both transmission and reception can be performed with one antenna. By doing so, it is considered that the number of antennas can be reduced.
  • the present invention provides a wireless communication apparatus including a wireless unit that can reduce the installation area of the filter.
  • a radio communication apparatus includes a modulation unit that modulates a transmission signal at a transmission frequency to generate a modulated transmission signal, and a demodulation unit that demodulates the modulation reception signal at a reception frequency different from the transmission frequency to generate a reception signal And at least one transmission / reception set connected to the modulation unit and the demodulation unit for transmitting the modulated transmission signal and receiving the modulated reception signal, wherein the transmission / reception set transmits the modulated transmission signal,
  • the transmission / reception antenna that receives the modulated reception signal, the reception antenna that receives the modulation reception signal, the modulation transmission signal that is generated between the modulation unit and the transmission / reception antenna, A transmission filter to be transmitted; interposed between the transmission / reception antenna and the demodulation unit; interposed between the reception antenna and the demodulation unit;
  • a reception filter that transmits the modulated reception signal received by the tenor and the reception antenna, a first circulator that guides the modulation reception signal received by the transmission / reception antenna to the reception filter, and reception by
  • the first circulator guides the modulated reception signal that passes through the reception filter from the reception antenna through the second circulator to the demodulation unit
  • the second circulator includes the transmission / reception antenna.
  • the modulated reception signal that passes through the reception filter through the first circulator is guided to the demodulation unit.
  • the first circulator not only guides the modulated reception signal received by the transmission / reception antenna to the reception filter, but also transmits the reception filter from the reception antenna through the second circulator.
  • the modulated reception signal is guided to the demodulation unit.
  • the second circulator not only guides the modulated reception signal received by the reception antenna to the reception filter, but also transmits the modulation from the transmission / reception antenna through the reception filter through the first circulator.
  • the received signal is guided to the demodulator. That is, since each circulator is used for two purposes, the number of wires in the circuit can be reduced as compared with the case where individual wires are provided.
  • the wireless communication apparatus preferably includes a plurality of the transmission / reception sets. In this configuration, even if the number of reception antennas increases due to an increase in the number of transmission / reception sets of the wireless communication apparatus, the number of reception filters can be suppressed to half the number of reception antennas.
  • the modulation unit can generate a first modulated transmission signal by modulating a transmission signal at a first transmission frequency, and modulate the transmission signal at a second transmission frequency to generate a second modulation.
  • a transmission signal can be generated, and the demodulation unit can generate a reception signal by demodulating the modulation reception signal at a first reception frequency different from the first transmission frequency, The reception signal can be generated by demodulating the modulation reception signal at a second reception frequency different from the transmission frequency of 2, and the transmission / reception antenna generates the first modulation transmission signal generated by the modulation unit.
  • the second modulated transmission signal can be transmitted, and the transmission / reception antenna can receive the modulated reception signal modulated at the first reception frequency and the modulated reception signal modulated at the second reception frequency.
  • the receiving antenna is A modulated reception signal modulated at the first reception frequency and a modulated reception signal modulated at the second reception frequency can be received, and the transmission filter transmits a first modulated transmission signal. And a second transmission filter that transmits the second modulated transmission signal, and the reception filter transmits the modulated reception signal modulated at the first reception frequency. And a second reception filter that transmits the modulated reception signal modulated at the second reception frequency, and the first transmission frequency is used for transmission or the second transmission frequency is used.
  • a transmission switching unit that enables either the first transmission filter or the second transmission filter depending on whether the first reception frequency is used for reception or the second reception Frequency Depending on whether the use, preferably comprises a receiving switching unit to enable one of said first reception filter said second reception filter.
  • communication using a plurality of transmission frequencies and a plurality of reception frequencies can be performed only by adding a filter and a switching unit without providing a transmission / reception set for each of a plurality of transmission frequencies and a plurality of reception frequencies. Therefore, the increase in circuit area can be suppressed and the circuit structure can be simplified.
  • SC-FDMA Single-Carrier-Frequency-Division-Multiple-Access
  • OFDMA Orthogonal-Frequency-Division-Multiple-Access
  • FIG. 1 is a diagram of a mobile station according to the first embodiment of the present invention.
  • the mobile station includes radio units (transmission / reception sets) 100 and 120 and a modem circuit 101.
  • the radio unit 100 includes a transmission / reception antenna 103, a reception antenna 105, a transmission filter 107, a reception filter 109, a first circulator 111, a second circulator 113, an amplifier 115, an amplifier 117, and an amplifier 119.
  • the radio unit 100 is connected to the modem circuit 101.
  • the configuration of the wireless unit 120 is the same as the configuration of the wireless unit 100.
  • the radio unit 120 includes a transmission / reception antenna 123, a reception antenna 125, a transmission filter 127, a reception filter 129, a first circulator 131, a second circulator 133, an amplifier 135, an amplifier 137, and an amplifier 139.
  • the radio unit 120 is connected to the modem circuit 101.
  • the modem circuit 101 includes a modulation unit and a demodulation unit.
  • the transmission / reception antenna 103 of the radio unit 100 transmits a modulated transmission signal and receives a downlink modulated reception signal.
  • the receiving antenna 105 receives a downlink modulated reception signal.
  • the transmission filter 107 is a band limiting filter that transmits the uplink frequency.
  • the reception filter 109 is a band limiting filter that transmits a downlink frequency.
  • the first circulator 111 and the second circulator 113 are three-port circulators having three input / output ports.
  • the transmission / reception antenna 123 of the radio unit 120 transmits an uplink modulation transmission signal and receives a downlink modulation reception signal.
  • the receiving antenna 125 receives a downlink modulated reception signal.
  • the transmission filter 127 is a band limiting filter that transmits the uplink frequency.
  • the reception filter 129 is a band limiting filter that transmits a downlink frequency.
  • the first circulator 131 and the second circulator 133 are three-port circulators having three input / output ports.
  • the modulation unit of the modem circuit 101 modulates two different sequences of uplink transmission signals with the same uplink frequency to generate two sequences of uplink modulated transmission signals.
  • One sequence of the generated two sequences of uplink modulated transmission signals is guided to the amplifier 115 of the radio unit 100 and amplified, and then guided to the transmission filter 107.
  • the series passes through the transmission filter 107 and travels toward the transmission / reception antenna 103.
  • One series of another uplink modulated transmission signal generated by the modulation unit of the modulation / demodulation circuit 101 is guided to the amplifier 135 of the radio unit 120 and amplified, and then guided to the transmission filter 127.
  • the series passes through the transmission filter 127 and travels toward the transmission / reception antenna 123.
  • These two series of uplink modulated transmission signals are simultaneously transmitted in parallel from the transmission / reception antenna 103 and the transmission / reception antenna 123 to the base station.
  • the transmitted two series of uplink modulated transmission signals are spatially multiplexed and received by four reception antennas provided in a base station (not shown).
  • reception processing of a downlink modulation reception signal will be described.
  • Four different series of downlink modulated received signals which are different from the uplink frequency, are simultaneously transmitted and spatially multiplexed from four transmission antennas of a base station (not shown).
  • the spatially multiplexed downlink modulated reception signal is received by the transmission / reception antenna 103 of the radio unit 100.
  • the downlink modulated reception signal received by the transmission / reception antenna 103 is guided to the reception filter 109 by the first circulator 111, passes through the reception filter 109, and is directed to the second circulator 113. Further, the downlink modulated received signal is guided to the amplifier 119 by the second circulator 113 and amplified, and then directed to the demodulator of the modem circuit 101.
  • the spatially multiplexed downlink modulated received signal is received by the receiving antenna 105 of the radio unit 100.
  • the downlink modulated reception signal received by the reception antenna 105 is guided to the reception filter 109 by the second circulator 113, passes through the reception filter 109, and is directed to the first circulator 111. Further, the downlink modulated received signal is guided to the amplifier 117 by the first circulator 111 and amplified, and then directed to the demodulator of the modem circuit 101.
  • the downlink modulated received signal received by transmitting / receiving antenna 123 and the downlink modulated received signal received by receiving antenna 125 are directed to the demodulating section of modem circuit 101.
  • a downlink modulated reception signal transmitted from any one of the four transmission antennas of the base station is transmitted to the four reception antennas of the mobile station (the antennas 103 and 105 of the radio unit 100 and the antenna 123 of the radio unit 120). And 125) all received in a spatially multiplexed state.
  • each reception antenna of the mobile station receives a downlink modulated reception signal transmitted from the four transmission antennas of the base station and spatially multiplexed.
  • the spatially multiplexed downlink modulated reception signals respectively received by the four reception antennas of the mobile station are directed to the demodulation unit of the modem circuit 101 via the radio unit 100 or the radio unit 120 corresponding to the received antenna. It is done.
  • Each of the spatially multiplexed downlink modulated reception signals received by the four reception antennas (antennas 103 and 105 of the radio unit 100 and antennas 123 and 125 of the radio unit 120) has different propagation characteristics. The fading you receive is also different. Therefore, the demodulation unit of the modem circuit 101 can obtain a channel matrix that is a characteristic value of a plurality of propagation paths between the base station and the mobile station, based on each of the spatially multiplexed downlink modulated reception signals.
  • the demodulator of the modem circuit 101 multiplies the inverse matrix of the channel matrix by the spatially multiplexed downlink modulated received signal to obtain four series of downlink modulated received signals before being spatially multiplexed. Then, the demodulator of the modem circuit 101 demodulates the four series of downlink modulated reception signals at the downlink frequency to generate four series of downlink reception signals.
  • the first circulators 111 and 131 guide the downlink modulated reception signals received by the transmitting and receiving antennas 103 and 123 to the reception filters 109 and 129, and
  • the circulators 113 and 133 guide the downlink modulated reception signals received by the reception antennas 105 and 125 to the same reception filters 109 and 129. That is, since downlink modulated received signals received by different antennas pass through one reception filter, it is not necessary to provide a reception filter for each antenna to be received. Therefore, one radio unit having two antennas to receive is provided. The circuit area for one reception filter can be reduced.
  • the first circulators 111 and 131 modulate / demodulate the downlink modulated reception signals that pass through the reception filters 109 and 129 from the reception antennas 105 and 125 through the second circulators 113 and 133.
  • the second circulators 113 and 133 guide the downlink modulated reception signals transmitted from the transmitting and receiving antennas 103 and 123 through the first circulators 111 and 131 through the reception filters 109 and 129 to the modulation unit of the circuit 101. 101 to the demodulator.
  • the present invention is not limited to such a form, and the downlink modulated reception signal that passes through the reception filter from the reception antenna through the second circulator passes to the demodulation unit of the modem circuit without passing through the first circulator. You may be guided. Further, the downlink modulated reception signal that passes through the reception filter from the transmission / reception antenna through the first circulator may be guided to the demodulation unit of the modulation / demodulation circuit without passing through the second circulator.
  • the radio unit 100 exists between the first circulator and the modulation / demodulation circuit 101, and between the amplifier 117 and the second circulator and the modulation / demodulation circuit 101 that amplify the downlink modulated reception signal.
  • the modem circuit 101 may include such an amplifier.
  • the radio unit 120 exists between the first circulator and the modulation / demodulation circuit 101, and exists between the amplifier 137 that amplifies the downlink modulation reception signal and the second circulator and the modulation / demodulation circuit 101, and receives the downlink modulation reception.
  • the amplifier 139 that amplifies the signal is included, the present invention is not limited to such a form, and the modem circuit 101 may include such an amplifier.
  • the first embodiment described above is used for MIMO by the space division multiplexing (SDM) scheme in which different signals are transmitted from the respective antennas, but the present invention is not limited to such a form.
  • SDM space division multiplexing
  • E-SDM Eigenbeam-Space Division Multiplexing
  • mobile station transmission 2 ⁇ 4 MIMO using two transmission antennas at the mobile station, and four reception antennas at the base station, and four transmission antennas at the base station are used.
  • the mobile station uses 4 reception antennas using 4 reception antennas, but the present invention is not limited to such a form.
  • the mobile station uses 2 transmission antennas, It may be used for MIMO having different antenna configurations, such as mobile station transmission 2 ⁇ 2 MIMO using two receive antennas at the base station.
  • the modulation unit and the demodulation unit are provided in one modulation / demodulation circuit.
  • the present invention is not limited to such a configuration, and the modulation unit and the demodulation unit are respectively provided in the mobile station. It may be provided independently.
  • the present invention is not limited to such a configuration, and may include only one wireless unit, or three or more. You may have.
  • FIG. 2 is a diagram of a mobile station according to the second embodiment of the present invention.
  • the mobile station includes radio units (transmission / reception sets) 200 and 230 and a modem circuit 201.
  • the radio unit 200 includes a transmission / reception antenna 202, a reception antenna 203, a first transmission filter 205, a second transmission filter 207, a first reception filter 209, a second reception filter 211, transmission switches 213 and 215, Receiving switches 217 and 219, a first circulator 221, a second circulator 223, and amplifiers 225 and 227 are included.
  • the radio unit 200 is connected to the modem circuit 201.
  • the configuration of the wireless unit 230 is the same as the configuration of the wireless unit 200.
  • the radio unit 230 includes a transmission / reception antenna 232, a reception antenna 233, a first transmission filter 235, a second transmission filter 237, a first reception filter 239, a second reception filter 241, transmission switches 243 and 245, Receiving switches 247 and 249, a first circulator 251, a second circulator 253, and amplifiers 255 and 257 are included.
  • the radio unit 200 is connected to the modem circuit 201. Although not shown in FIG. 2, the modem circuit 201 includes a modulation unit and a demodulation unit.
  • the transmission / reception antenna 202 of the radio unit 200 transmits the first and second uplink modulation transmission signals and receives the first and second downlink modulation reception signals.
  • the receiving antenna 203 receives the first and second downlink modulated reception signals.
  • the first transmission filter 205 is a band limiting filter that transmits the first uplink frequency.
  • the second transmission filter 207 is a band limiting filter that transmits the second uplink frequency.
  • the first reception filter 209 is a band limiting filter that transmits the first downlink frequency.
  • the second reception filter 211 is a band limiting filter that transmits the second downlink frequency.
  • the first circulator 221 and the second circulator 223 are three-port circulators having three input / output ports.
  • the transmission / reception antenna 232 of the radio unit 230 transmits the first and second uplink modulation transmission signals and receives the first and second downlink modulation reception signals.
  • the receiving antenna 233 receives the first and second downlink modulated reception signals.
  • the first transmission filter 235 is a band limiting filter that transmits the first uplink frequency.
  • the second transmission filter 237 is a band limiting filter that transmits the second uplink frequency.
  • the first reception filter 239 is a band limiting filter that transmits the first downlink frequency.
  • the second reception filter 241 is a band limiting filter that transmits the second downlink frequency.
  • the first circulator 251 and the second circulator 253 are three-port circulators having three input / output ports.
  • the first uplink frequency, the second uplink frequency, the first downlink frequency, and the second downlink frequency are different from each other.
  • the modulation unit of the modem circuit 201 modulates two different sequences of uplink transmission signals with the first uplink frequency to generate two sequences of first uplink modulated transmission signals.
  • the transmission switch 215 guides one sequence of the generated first uplink modulated transmission signal to the amplifier 225 in response to the use of the first uplink frequency for uplink transmission.
  • the sequence is amplified by the amplifier 225 and then guided to the first transmission filter 205 that transmits the first uplink frequency.
  • the sequence passes through the first transmission filter 205, is guided to the transmission switch 213, and travels toward the transmission / reception antenna 202.
  • one series of another first uplink modulated transmission signal generated by the modulation unit of the modem circuit 201 is guided to the transmission switch 245.
  • the transmission switch 245 guides another series of the generated first uplink modulated transmission signals to the amplifier 255 in response to the use of the first uplink frequency for uplink transmission.
  • the sequence is amplified by the amplifier 255 and then guided to the first transmission filter 235 that transmits the first uplink frequency.
  • the sequence passes through the first transmission filter 235, is guided to the transmission switch 243, and travels toward the transmission / reception antenna 232.
  • These two series of first uplink modulated transmission signals are simultaneously transmitted in parallel from the transmission / reception antenna 202 and the transmission / reception antenna 232 to the base station.
  • the transmitted two series of first uplink modulated transmission signals are spatially multiplexed and received by four receiving antennas provided in a base station (not shown).
  • the second uplink frequency is used. Basically, it is the same as the transmission process when the first uplink frequency is used, but the second uplink to be transmitted by each transmission switch according to the use of the second uplink frequency. The difference is that the modulated transmission signal is guided to each second transmission filter.
  • reception processing of a downlink modulation reception signal will be described.
  • reception processing when using the first downlink frequency will be described.
  • Four different series of downlink modulated reception signals are simultaneously transmitted from the four transmission antennas of the base station (not shown) at the first downlink frequency and are spatially multiplexed.
  • the first downlink modulated reception signal modulated at the first downlink frequency is received by the transmission / reception antenna 202 of the radio unit 200.
  • the first downlink modulated reception signal received by the transmission / reception antenna 202 is guided to the reception switch 217 by the first circulator 221.
  • the reception switch 217 transmits the received first downlink modulated received signal through the first downlink frequency in response to the use of the first downlink frequency for downlink reception. It leads to the reception filter 209.
  • the first downlink modulated reception signal passes through the first reception filter 209, is then guided to the reception switch 219, and is directed to the second circulator 223 by the reception switch 219. Further, the first downlink modulated reception signal is guided to the demodulator of the modem circuit 201 by the second circulator 223.
  • the modem circuit 201 is provided with an amplifier that amplifies the first downlink modulated reception signal. However, such an amplifier may be provided in the radio unit 200.
  • the first downlink modulated reception signal modulated at the first downlink frequency is received by the receiving antenna 203 of the radio unit 200.
  • the first downlink modulated reception signal received by the reception antenna 203 is guided to the reception switch 219 by the second circulator 223.
  • the reception switch 219 transmits the first downlink modulated reception signal received through the first downlink frequency in response to the first downlink frequency being used for downlink reception. It leads to the reception filter 209.
  • the first downlink modulated reception signal passes through the first reception filter 209, is guided to the reception switch 217, and is directed to the first circulator 221 by the reception switch 217. Further, the first downlink modulated reception signal is guided to the demodulator of the modem circuit 201 by the first circulator 221.
  • the modem circuit 201 is provided with an amplifier that amplifies the first downlink modulated reception signal. However, such an amplifier may be provided in the radio unit 200.
  • the first downlink modulated reception signal received by the transmission / reception antenna 232 and the first downlink modulation reception signal received by the reception antenna 233 are also used as the demodulation unit of the modulation / demodulation circuit 201.
  • the modem circuit 201 is provided with an amplifier that amplifies the first downlink modulated reception signal.
  • such an amplifier may be provided in the wireless unit 230.
  • the first downlink modulated reception signal transmitted from the arbitrary one of the four transmission antennas of the base station at the first downlink frequency is converted into four reception antennas (antennas of the radio unit 200) of the mobile station.
  • 202 and 203, and 232 and 233) of the radio unit 230 all receive in a spatially multiplexed state.
  • each receiving antenna of the mobile station receives the first downlink modulated received signal that is transmitted from the four transmitting antennas of the base station at the first downlink frequency and spatially multiplexed.
  • the spatially multiplexed first downlink modulated reception signals respectively received by the four receiving antennas of the mobile station pass through the radio unit 200 or the radio unit 230 corresponding to the received antenna, and then the demodulation unit of the modem circuit 201 Respectively directed to.
  • Each of the first downlink modulated reception signals spatially multiplexed received by the four reception antennas (antennas 202 and 203 of the radio unit 200 and 232 and 233 of the radio unit 230) has different propagation characteristics. Since it passes through the propagation path, the fading it receives is also different. Therefore, the demodulator of the modem circuit 201 can obtain channel matrices that are characteristic values of a plurality of propagation paths between the base station and the mobile station, based on each of the first downlink modulated reception signals that are spatially multiplexed. it can.
  • the demodulator of the modem circuit 201 multiplies the inverse matrix of the channel matrix by the first downlink modulated reception signal that is spatially multiplexed to thereby obtain the first series of first downlink modulated receptions that have not been spatially multiplexed. Find the signal. Then, the demodulator of the modem circuit 201 demodulates the four series of first downlink modulated reception signals at the first downlink frequency to generate four series of downlink reception signals.
  • a reception process when using the second downlink frequency will be described. Basically, it is the same as the reception process when the first downlink frequency is used, but the second downlink in which each reception switch is received according to the use of the second downlink frequency. The difference is that the modulated reception signal is guided to each second reception filter.
  • the transmission switch transmits a transmission filter having frequency characteristics to be transmitted by one radio unit according to the first and second uplink frequencies. Guide the signal.
  • the reception switching unit guides the reception signal toward a filter having frequency characteristics to be transmitted by one radio unit according to the first and second downlink frequencies. For this reason, signal transmission at the first and second uplink frequencies and signal reception at the first and second downlink frequencies can be performed by one radio unit, and thus a configuration in which a radio unit is provided for each frequency Compared to the above, an increase in the area of the radio part can be suppressed, and the circuit structure can be simplified.
  • the present invention is not limited to such a form, Three or more uplink frequencies may be used. The same applies to the downlink frequency.
  • two wireless transmission units are provided with two pairs of transmission switches, and two transmission filters having different frequency characteristics are installed in parallel between each pair of transmission switches.
  • the present invention is not limited to such a form.
  • each transmission switch pair only one of the transmission switches may be provided. That is, for example, the radio unit 200 of FIG. 2 includes transmission switchers 213 and 215, but includes only the transmission switcher 213, and the transmission switcher 215 may be used as a wiring.
  • the transmission switch 213 may be a wiring. The same applies to the reception switcher and the reception filter.
  • the first and second embodiments described above are capable of MIMO in which a modulated transmission signal is transmitted to the base station at at least one uplink frequency and a modulated reception signal is received from the base station at at least one downlink frequency.
  • the present invention is not limited to such a form.
  • a modulated transmission signal is transmitted to a plurality of mobile stations using at least one downlink frequency, and at least one uplink frequency is used.
  • the present invention can be applied to a MIMO-capable base station that receives modulated reception signals from a plurality of mobile stations.
  • Such an application is achieved by modifying the first and second embodiments by reciprocally reading "mobile station” and “base station” and rereading "uplink” and "downlink”. realizable.
  • the third embodiment can be applied to a wireless communication system that uses SC-FDMA for uplink communication and OFDMA for downlink communication. It is not limited.
  • the configuration, transmission process, and reception process of the base station according to the third embodiment are the same as those of the mobile station capable of MIMO according to the first embodiment.
  • the modulation transmission signal generation process performed by the modulation / demodulation circuit 101 in the transmission process and the modulation reception signal generation process performed by the modulation / demodulation circuit 101 in the reception process are different, and will be described below.
  • the modulation unit of the modem circuit 101 modulates two different downlink transmission signals representing transmission data for a plurality of users with the same downlink frequency to generate two downlink OFDMA modulated transmission signals.
  • One sequence of the two generated downlink modulation transmission signals is led to the amplifier 115 of the radio unit 100, and one sequence of another downlink modulation transmission signal is led to the amplifier 135 of the radio unit 120. Processing after the generated two series of downlink modulated transmission signals are guided to the amplifier 115 and the amplifier 135, respectively, is the same as the transmission processing of the first embodiment.
  • the uplink SC-FDMA modulated reception signals which are transmitted from four transmission antennas of each of a plurality of mobile stations (not shown) and are spatially multiplexed, are received by the transmission / reception antennas 103 and 123 and the reception antennas 105 and 125. Is done. Thereafter, the processing until the spatially multiplexed uplink modulated reception signal is guided to the demodulator through the reception filter is the same as the reception processing of the first embodiment.
  • the demodulation unit of the modem circuit 201 obtains an uplink SC-FDMA modulated reception signal before spatial multiplexing from the spatially multiplexed uplink SC-FDMA modulated reception signal received by the four reception antennas. Then, the demodulator of the modem circuit 201 demodulates the uplink modulated received signal corresponding to each mobile station at the uplink frequency to generate the uplink received signal.
  • the configuration, transmission process, and reception process of the base station according to the third embodiment may be the same as those of the mobile station capable of MIMO according to the second embodiment.
  • the modulation transmission signal generation process performed by the modulation / demodulation circuit 201 in the transmission process and the modulation reception signal generation process performed by the modulation / demodulation circuit 201 in the reception process are the same as those of the base station to which the first embodiment is applied. Different.
  • the same effect as that achieved by the first and second embodiments can be realized also in the base station.
  • a modification example of the first and second embodiments replaces “mobile station” and “base station” with each other, and “uplink” and “downlink” with each other. All are applied after replacing with.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
PCT/JP2010/071449 2009-12-07 2010-12-01 無線通信装置 WO2011070949A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201080055397.4A CN102648586B (zh) 2009-12-07 2010-12-01 无线通信设备
EP10835871.4A EP2512038B1 (en) 2009-12-07 2010-12-01 Radio communication apparatus
US13/514,327 US8983401B2 (en) 2009-12-07 2010-12-01 Radio communication apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009277668A JP5096443B2 (ja) 2009-12-07 2009-12-07 無線通信装置
JP2009-277668 2009-12-07

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WO2011070949A1 true WO2011070949A1 (ja) 2011-06-16

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PCT/JP2010/071449 WO2011070949A1 (ja) 2009-12-07 2010-12-01 無線通信装置

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EP (1) EP2512038B1 (zh)
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JP5096443B2 (ja) 2012-12-12
EP2512038A1 (en) 2012-10-17
US8983401B2 (en) 2015-03-17
EP2512038B1 (en) 2017-03-08
EP2512038A4 (en) 2016-04-27
JP2011120156A (ja) 2011-06-16
CN102648586B (zh) 2014-08-06
US20120244821A1 (en) 2012-09-27
CN102648586A (zh) 2012-08-22

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