WO2013019031A2 - Procédé de transmission de signal de référence, appareil de transmission de signal de référence, procédé de réception de signal de référence et appareil de réception de signal de référence - Google Patents

Procédé de transmission de signal de référence, appareil de transmission de signal de référence, procédé de réception de signal de référence et appareil de réception de signal de référence Download PDF

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Publication number
WO2013019031A2
WO2013019031A2 PCT/KR2012/006001 KR2012006001W WO2013019031A2 WO 2013019031 A2 WO2013019031 A2 WO 2013019031A2 KR 2012006001 W KR2012006001 W KR 2012006001W WO 2013019031 A2 WO2013019031 A2 WO 2013019031A2
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Prior art keywords
control information
mapped
pdcch
band
pdsch
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PCT/KR2012/006001
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English (en)
Korean (ko)
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WO2013019031A3 (fr
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박경민
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주식회사 팬택
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Publication of WO2013019031A2 publication Critical patent/WO2013019031A2/fr
Publication of WO2013019031A3 publication Critical patent/WO2013019031A3/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present invention relates to a transmission and reception method for transmitting and receiving control information transmitted to a part of a band of a data area and a reference signal for the control information in a communication system and a transmission and reception apparatus thereof.
  • MIMO Multiple Input Multiple Output
  • CA Carrier Aggregation
  • CoMP Coordinated Multiple Point
  • Wireless Relay Node improve data transmission speed. Is being considered for.
  • MIMO Multiple Input Multiple Output
  • CA Carrier Aggregation
  • CoMP Coordinated Multiple Point
  • Wireless Relay Node improve data transmission speed.
  • the radio frame or radio frame may be configured in units of subframes, and the subframes may be composed of a plurality of symbols.
  • the control signal transmitted to the conventional terminal is allocated to a control region set over a plurality of symbols, and data is allocated to a data region set over the remaining symbols.
  • resources of the control area may be insufficient for transmitting control information, and a part of the data area may be allocated for transmitting control information.
  • a channel of a part of the data area transmitting the control information should be estimated using a reference signal.
  • the present invention relates to a reference for increasing a reference signal transmission band required for decoding control information in order to increase the reliability or accuracy of channel estimation for a band in which this control information is transmitted, which is necessary for decoding control information transmitted through a portion of the data area.
  • An object of the present invention is to provide a signal transmission / reception method and a transmission / reception apparatus thereof.
  • an embodiment of the present invention generating a De-Modulation Reference Signal (DM-RS) for the control information of a specific terminal; And specifying a portion of a data region to which control information of the specific terminal is mapped and a portion of another data region to which control information of the specific terminal is not mapped among data regions of one resource block group in a subframe including a data region. It provides a DM-RS transmission method comprising the step of mapping the DM-RS to the control information of the terminal.
  • DM-RS De-Modulation Reference Signal
  • a data area of one resource block group is received as part of a data area to which control information is mapped and as part of another data area to which the control information is not mapped.
  • a reference signal generation unit for generating a DM-RS for the control information of a specific terminal; And controlling a portion of a data region to which control information of the specific terminal is mapped and a portion of another data region to which control information of the specific terminal is not mapped among data regions of one resource block group in a subframe including a data region.
  • a transmission apparatus including a resource element mapper for mapping a DM-RS to information.
  • another embodiment of the present invention provides a portion of a data region to which control information is mapped among data regions of one resource block group in a subframe including a data region and other data to which the control information is not mapped.
  • a resource element demapper for demapping a DM-RS for control information from a signal received as part of an area;
  • a channel estimator for estimating a virtual channel using a DM-RS for demapped control information.
  • a transmission / reception method according to the embodiments and a transmission / reception apparatus thereof are used to decode control information in order to increase the reliability or accuracy of channel estimation for a band in which the control information required for decoding control information transmitted through a portion of the data area is transmitted. There is an effect that can increase the required reference signal transmission band.
  • FIG. 1 illustrates a communication system to which embodiments of the present invention are applied.
  • FIG. 2 shows the overall structure of a downlink subframe including a PDCCH, a PDSCH, and a DM-RS.
  • FIG 3 illustrates a structure of a downlink subframe including control information in a data region (PDSCH region).
  • FIG. 4 is a diagram illustrating a relationship between a PDSCH band, an E-PDCCH band, a resource block, and a resource block group.
  • FIG. 5 is a structural diagram of a transmitter according to an embodiment.
  • FIG. 6 illustrates a process of DM-RS generation and precoding according to another embodiment.
  • FIG. 7 is a structural diagram of a transmitter according to another embodiment.
  • FIG. 8 illustrates a process of DM-RS generation and precoding of the transmitter of FIG. 7.
  • FIG. 9 is a structural diagram of a transmitter according to another embodiment.
  • FIG. 10 illustrates a process of generating and precoding DM-RSs of the transmitter of FIG. 9.
  • FIG. 11 is a structural diagram of a transmitter according to another embodiment.
  • FIG. 12 illustrates a DM-RS generation and precoding process of the transmitter of FIG. 11.
  • FIG. 13 is a structural diagram of a transmitter according to another embodiment.
  • FIG. 14 illustrates a process of DM-RS generation and precoding of the transmitter of FIG. 13.
  • 15 is a structural diagram of a transmitter according to another embodiment.
  • FIG. 16 illustrates a DM-RS generation and precoding process of the transmitter of FIG. 15.
  • 17 to 19 illustrate a process of DM-RS generation and precoding according to another embodiment.
  • 20 illustrates a process of DM-RS generation and precoding according to another embodiment.
  • 21 is a structural diagram of a transmission apparatus according to another embodiment.
  • 22 is a flowchart of a method of transmitting a DM-RS according to another embodiment.
  • FIG. 23 is a structural diagram of a receiving apparatus according to another embodiment.
  • 24 is a flowchart of a DM-RS receiving method according to another embodiment.
  • FIG. 25 is a result graph of improved accuracy of E-PDCCH decoding according to a DM-RS transmission band required for E-PDCCH decoding.
  • FIG. 1 illustrates a communication system to which embodiments of the present invention are applied.
  • Communication systems are widely deployed to provide various communication services such as voice, packet data, and the like.
  • a communication system includes a user equipment (UE) 10 and a transmission point 20 that performs uplink and downlink communication with the terminal 10.
  • UE user equipment
  • transmission point 20 that performs uplink and downlink communication with the terminal 10.
  • a terminal 10 or a user equipment (UE), a receiving end is a comprehensive concept of a user terminal in wireless communication, and a mobile station (MS) in GSM as well as a UE in WCDMA and LTE, HSPA, etc. It should be interpreted as a concept that includes a user terminal (UT), a subscriber station (SS), a wireless device, and the like.
  • the transmitting end 20 or cell generally refers to a station communicating with the terminal 10, and includes a base station, a node-B, an evolved node-B, and a base transceiver. Other terms may be referred to as a system, an access point, a relay node, and a radio unit (RU).
  • RU radio unit
  • the transmission terminal 20 or a cell should be interpreted in a comprehensive sense indicating a part of a region covered by a base station controller (BSC) in a CDMA, a NodeB of a WCDMA, etc., and a radio remote connected to a base station. All types of communication with one terminal such as head, relay node, sector of macro cell, site, other femtocell, picocell, micro cell such as RU (Radio Unit) Used as a generic concept to mean a device.
  • BSC base station controller
  • one terminal 10 and one transmission terminal 20 are shown in FIG. 1, the present invention is not limited thereto. It is possible for one transmission terminal 20 to communicate with the plurality of terminals 10, and one terminal 10 may communicate with the plurality of transmission terminals 20.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • OFDM OFDM
  • the present invention is a combination of the TDD (Time Division Duplex) method is transmitted using a different time, uplink transmission and downlink transmission, FDD (Frequency Division Duplex) method is transmitted using a different frequency, combining the TDD and FDD Applicable to hybrid duplexing method.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • embodiments of the present invention are applicable to asynchronous wireless communication that evolves into Long Term Evolution (LTE) and LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB.
  • LTE Long Term Evolution
  • WCDMA Long Term Evolution-advanced through GSM
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High Speed Packet Access
  • CDMA Code Division Multiple Access
  • CDMA-2000 Code Division Multiple Access-2000
  • UMB Universal Mobile Broadband
  • the transmitting end 20 performs downlink transmission to the terminal 10.
  • the transmitter 20 may transmit a physical downlink shared channel (PDSCH), which is a main physical channel for unicast transmission.
  • PDSCH physical downlink shared channel
  • the transmitting end 20 grants scheduling control for transmission on downlink control information such as scheduling required for reception of the PDSCH and uplink data channel (for example, a physical uplink shared channel (PUSCH)).
  • Physical Downlink Control Channel (PDCCH) for transmitting information
  • Physical Control Format Indicator Channel (PCFICH) for transmitting an indicator for distinguishing the region of PDSCH and PDCCH
  • uplink transmission A control channel such as a physical HARQ indicator channel (PHICH) for transmitting a HARQ (Hybrid Automatic Repeat reQuest) confirmation may be transmitted.
  • PHICH physical HARQ indicator channel
  • HARQ Hybrid Automatic Repeat reQuest
  • the transmitter 20 transmits a Cell-Specific Reference Signal (CRS), a MBSFN Reference Signal (MBSFN-RS), and a UE-Specific Reference Signal (UE) in the downlink.
  • CRS Cell-Specific Reference Signal
  • MBSFN-RS MBSFN Reference Signal
  • UE UE-Specific Reference Signal
  • Specific Reference Signal DM-RS
  • PRS Positioning Reference Signal
  • CSI Reference Signal Channel State Information Reference Signal
  • FIG. 2 shows the overall structure of a downlink subframe including a PDCCH, a PDSCH, and a DM-RS.
  • one subframe 200 includes data in which a control channel (PDCCH) region 210 in which a control channel including a PDCCH is transmitted and a shared data channel including a PDSCH are transmitted. It can be divided into a data region 220.
  • the horizontal axis represents time (or OFDM symbol) and the vertical axis represents frequency.
  • the control region 210 may be 0 to 4 OFDM symbols.
  • the CRS 230 is a cell specific reference signal transmitted through all bands, and the DM-RSs 240 and 250 are in a band in which PDSCHs for respective UEs UE 0 and UE 1 are transmitted.
  • UE-specific reference signal (UE specific-reference signal) is defined.
  • the cell specific reference signal means that the form of RS, for example, CRS, transmitted to each UE (UE 0, UE 1) in the same cell may be the same.
  • UE-specific reference signal means that the type of the RS, for example, DM-RS transmitted to each terminal may be different.
  • the DM-RS (240, 250), which is a UE-specific reference signal, uses a precoding scheme for precoding complex symbols using a precoding matrix before the transmitting terminal 20 transmits the complex symbols.
  • a reference signal is transmitted for the purpose of supporting the terminal or the receiving end 10 to acquire information about a virtual channel modified by precoding in an environment of use.
  • the DM-RSs 240 and 250 which are UE-specific reference signals, are transmitted for a band where each UE (UE 0, UE 1) receives a PDSCH, and each UE (UE 0, UE 1). ) Acquires channel or virtual channel information necessary for PDSCH decoding through this DM-RS reception.
  • DM-RS (240, 250) uses a PN code as a sequence (sequence), when transmitting a plurality of DM-RS (240, 250) to the same terminal, resource element splitting using different resource elements ( Each DM-RS (240, 250) is distinguished through the use of resource element division (OCD) and orthogonal cover code or sequence (OCC).
  • OCD resource element division
  • OCC orthogonal cover code or sequence
  • DM-RS When DM-RS is transmitted to band overlapping to a plurality of UEs, scrambling is applied to the DM-RS sequence to distinguish DM-RSs 240 and 250 that each UE should receive. To help.
  • the DM-RS (240, 250) to be received by each terminal, it acquires the channel or virtual channel information through the DM-RS, the channel estimation through interpolation (interpolation) in the above-described process Can increase the reliability.
  • a different type of DM-RS transmitted to each UE in case of a UE receiving a rank 1 PDSCH, a single layer DM-RS is delivered.
  • two layers (rank 2) DM-RS are transmitted, and DM-RS transmission is performed according to a precoding matrix or a type of precoder used by each UE for PDSCH reception. The method is determined.
  • the rank N (N is a natural number greater than 1) includes layers 0 to N-1, and may transmit the DM-RS according to the N layers DM-RS type.
  • DM-RS transmitted by the above-described DM-RS transmission method for each terminal is precoded and transmitted using the same precoding matrix or precoder used for PDSCH transmission, so that a virtual channel estimation for PDSCH reception is performed.
  • the virtual channel refers to a precoding channel.
  • control information is acquired through channel information estimated through channel estimation through a CRS, which is a full band or wideband reference signal, and a subband reference signal for a subband in which a PDSCH is transmitted ( It acquires virtual channel information about a virtual channel (virtual channel, precoded channel) acquired through DM-RS, which is a subband reference signal, and performs PDSCH reception using this virtual channel information.
  • the DM-RS may provide information on precoding, but when the band in which the PDSCH is transmitted is narrow, the reliability of channel information by the DM-RS may be reduced.
  • the band on which the PDSCH is transmitted is wide enough so that the accuracy of channel estimation through the DM-RS is sufficiently high, so channel estimation through the DM-RS can be very useful.
  • FIG 3 illustrates a structure of a downlink subframe including control information in a data region (PDSCH region).
  • one subframe 300 may be divided into a control region 310 in which a control channel including a PDCCH is transmitted and a data region 320 in which a shared data channel including a PDSCH is transmitted.
  • a control region 310 in which a control channel including a PDCCH is transmitted
  • a data region 320 in which a shared data channel including a PDSCH is transmitted.
  • the horizontal axis represents time (or OFDM symbol) and the vertical axis represents frequency.
  • the control channel PDCCH is used to transmit downlink control information (DCI) such as scheduling decisions and power control commands.
  • DCI downlink control information
  • DCI format 0 and DCI format 4 are used for uplink grant.
  • DCI format 1 / 1A / 1B / 1C / 1D / 2 / 2A / 2B / 2C is used for downlink scheduling assignment.
  • DCI format 3 / 3A is used for power control.
  • Each DCI message payload has a Cyclic Redundancy Check (CRC), and a Radio Network Temporary Identifier (RNTI) for identifying a UE is included in the CRC calculation process.
  • CRC Cyclic Redundancy Check
  • RNTI Radio Network Temporary Identifier
  • Each UE is allocated a common search space or UE-specific search space of the control region 310 in the PDCCH, and searches whether there is control information received through the PDCCH in the region. That is, each terminal may search for a PDCCH through blind decoding and, upon confirming reception of the PDCCH, may control based on control information transmitted through the PDCCH.
  • the LTE / LTE-A system defines the use of a component carrier (CC), which is a plurality of unit carriers, as a method for extending a system requirement, that is, a bandwidth for satisfying a high data rate.
  • CC component carrier
  • one CC may have a bandwidth of up to 20 MHz, and resources can be allocated within 20 MHz according to a corresponding service, but this is only one embodiment according to a process of implementing a system and a bandwidth of 20 MHz or more depending on the implementation of a system. Can be set to have.
  • CA carrier aggregation
  • the assignable frequency band that can be determined by the component carriers may be contiguous or non-contiguous depending on the scheduling of the actual CA.
  • the plurality of PDCCHs may be located in the control region of the CC which does not correspond, and this method may be referred to as cross-carrier scheduling.
  • MIMO Multiple Input / Multiple Output
  • CoMP Coordinated Multiple Point
  • wireless relay node may be considered to increase data transmission speed.
  • the control information may be mapped in the data region 320 where the PDSCH is transmitted and transmitted to the terminal. This method can support a large control information transmission channel capacity without reducing the reception reliability of the control information.
  • the control information channel newly defined in the existing PDSCH region for transmitting control information is called an extended control channel (Extended PDCCH, Extended-PDCCH, E-PDCCH, X-PDCCH), or an enhanced control channel (Enhanced-PDCCH). This is called E-PDCCH.
  • control information corresponding to each of the plurality of terminals must be transmitted without interference.
  • each control information is divided by code division.
  • each control information is transmitted through a different band.
  • the frequency division scheme to be transmitted may be used.
  • the control information and the PDSCH delivered to each terminal may be delivered through different bands according to eNB scheduling.
  • MU-MIMO multi-user multi-input multi-output
  • resources occupied by the E-PDCCH may be determined as an arbitrary E-PDCCH band by base station scheduling.
  • the resources occupied by the E-PDCCH may be defined as cell-specific resources. That is, a band that can occupy the E-PDCCH delivered to each terminal in the same cell is determined, and the E-PDCCH for each terminal may be defined within the band.
  • the resources occupied by the E-PDCCH may be predefined as the E-PDCCH band according to each UE.
  • the first of the three methods can guarantee the greatest flexibility and scheduling gain for E-PDCCH transmission, but in order for each UE to receive the E-PDCCH 1) information about the E-PDCCH band in advance Or 2) perform blind detection for the entire system band.
  • the third method cannot guarantee the E-PDCCH reception reliability because each terminal channel information cannot be used when selecting E-PDCCH resources.
  • the second method corresponds to a combination of both.
  • the subframe described with reference to FIGS. 2 and 3 is described as including a control region (PDCCH region) and a data region (PDSCH region), the subframe may include only the data region without including the control region.
  • FIG. 4 is a diagram illustrating a relationship between a PDSCH band, an E-PDCCH band, a resource block, and a resource block group.
  • E-PDCCH (UE) for UE 0 and UE 1 as shown in FIG. 362 and 364 and the PDSCH bands 222 and 224 may be adjacent to each other.
  • the E-PDCCH 362 for UE 0 and the PDSCH 222 by this E-PDCCH 362 are mapped to two resource block groups 471-1 and 471-2, and the E-PDCCH ( 362 may be mapped to one resource block constituting one of the two resource block groups 471-1 and 471-2.
  • each of the resource block groups 471-1 and 471-2 may be composed of three resource blocks.
  • the number of resource blocks constituting the resource block group according to the system band may be changed to one to four.
  • each area occupied by the E-PDCCHs of the UEs may be part of a data area in the resource block.
  • the E-PDCCH 366 may be transmitted alone without the PDSCH since there is no PDSCH when the UL control information is transmitted to the UE 2.
  • the E-PDCCH 366 for UE 2 may be mapped to any one of three resource blocks constituting one resource block group 471-3.
  • the band occupied by the E-PDCCH is defined as a cell-specific resource 471-4, or the band occupied by the E-PDCCH is determined in advance according to each UE. If defined, E-PDCCHs 362, 364, 366 delivered to another UE may be configured in an adjacent band. In FIG. 4B, the band occupied by the E-PDCCHs 362, 364, and 366 is a cell-specific resource or the E-PDCCHs 362, 364, and 366 according to each UE.
  • the occupied band is shown as one resource block group 471-4, but the band occupied by this cell specific resource or the E-PDCCHs 362, 364, and 366 is not limited thereto, and two or more resource block groups or It may vary with a certain number of resource blocks, a specific band, and the like.
  • the DM-RS is transmitted for PDSCH and E-PDCCH decoding through virtual channel estimation.
  • (1) DM-RS is transmitted only for the band where information transmission is performed.
  • the rank of DM-RS is the same as the rank of information transmitted on the same band.
  • (3) DM-RS is the same. It must be precoded through the same precoding matrix or precoder as the information transmitted on the band.
  • the DM-RS which is a UE-specific reference signal, is transmitted to scheduled resource blocks and corresponding layers, and the information transmitted on the DM-RS and the same band performs the same precoding operation.
  • E-PDCCHs 362, 364, and 366 since the E-PDCCHs 362, 364, and 366 perform rank 1 transmission and enable multi-rank transmission of the PDSCHs 222 and 224, PDSCHs 222 and 224 and E-PDCCHs 362, 364 and 366 may be transmitted together with the DM-RS by independent DM-RS resource mapping, respectively. Therefore, channel information necessary for decoding each E-PDCCH should be measured or estimated through in-band DM-RS to which each E-PDCCH is mapped.
  • the DM-RS is transmitted for a band where each terminal receives a PDSCH, and each terminal acquires channel or virtual channel information necessary for PDSCH decoding through the DM-RS reception.
  • the E-PDCCH of each terminal is also decoded in the terminal based on channel estimation through the DM-RS.
  • DM-RS should be transmitted not only for the band in which the PDSCH is transmitted but also for the radio resource in which the E-PDCCH is transmitted.
  • E-PDCCHs 362, 364, and 366 are transmitted through a relatively narrow band such as one resource block or a resource block pair, a channel estimation for E-PDCCH decoding is performed.
  • Channel estimation is performed through limited DM-RS resources within a narrow band, which may cause a significant degradation of channel estimation accuracy.
  • the E-PDCCH is transmitted through a narrower band than the PDSCH, the number of DM-RS complex symbols that the UE can use to estimate channel information transmitted with control information through the E-PDCCH is limited. .
  • the UE performs channel estimation through the DM-RS the reliability of the channel estimation result is lowered.
  • an embodiment of the present invention provides a DM-RS transmission method capable of increasing the reliability of channel estimation for decoding control information transmitted through the E-PDCCH.
  • FIG. 5 is a structural diagram of a transmitter according to an embodiment.
  • the transmitter 500 includes a reference signal generator 510, a precoder 520, and a resource element mapper 530 in whole or in part.
  • the transmitter 500 according to an embodiment may be the transmitter 20 described with reference to FIG. 1 or may correspond to some of the elements of the transmitter 20.
  • the reference signal generator 510 generates a scrambling and OCC generator 514 that generates a DM-RS by generating a scrambling and OCC and a basic sequence generator 512 that generates a basic sequence, for example, a DM-RS sequence. Include all or part.
  • the basic sequence generator 512 uses a PN code as a DM-RS sequence to generate a DM-RS.
  • the scrambling and OCC generation unit 514 transmits a plurality of DM-RSs to the same terminal, resource element division using different resource elements and orthogonal cover code or sequence (OCC) used as orthogonal codes Each DM-RS is distinguished through the use of.
  • the scrambling and OCC generator 514 delivers a DM-RS to band overlapping a plurality of terminals, the scrambling and the OCC generator 514 applies scrambling to the DM-RS sequence so that each terminal must receive itself.
  • DM-RS can be distinguished.
  • the reference signal generator 510 generates a reference signal transmitted through a band for transmitting information.
  • the reference signal generator 510 generates a DMSCH for PDSCH transmitted in a PDSCH band for transmitting data (data signal) through a PDSCH.
  • the reference signal generator 510 generates a DM-RS for the E-PDCCH transmitted in the E-PDCCH band for transmitting control information (control signal) through the E-PDCCH.
  • the DM-RS for the E-PDCCH may be the same as the DM-RS for the PDSCH, may be a part of the DM-RS for the PDSCH, or may be a modification of all or part of the DM-RS for the PDSCH, or a combination thereof.
  • the relationship between the DM-RS for the E-PDCCH and the DM-RS for the PDSCH may vary, and various embodiments related thereto will be described in detail below.
  • the precoder 520 precodes the data signal and the PDSCH for PDSCH using the same first precoding matrix or the first precoder.
  • the precoder 520 also precodes the control signal and the DM-RS for the E-PDCCH using the same second precoding matrix or the second precoder. In this case, it may or may not be the same between precoding matrices or between precoders. If the rank of the data signal and the DM-RS for the PDSCH and the control signal and the DM-RS for the E-PDCCH are different, the data signal and the DM-RS for the PDSCH and the control signal and the E-PDCCH before precoding to the precoder 520 are used.
  • the process of equalizing the rank of the DM-RS may be performed. For example, when the data signal for PDSCH is rank 2 and the control signal for E-PDCCH is rank 1, the rank of the control signal for E-PDCCH is matched to the rank of data signal for PDSCH and then precoded with the same precoding matrix. . At this time, the DM-RS for PDSCH and DM-RS for E-PDCCH perform the same process to match the rank.
  • the resource element mapper 530 maps symbols precoded by the precoder 520 to corresponding resource elements.
  • the resource element mapper 530 may map the PDSCH and the E-PDCCH to a specific band or a specific resource block group and at least one resource block as described with reference to FIGS. 3 and / or 4.
  • the resource element mapper 530 maps the DM-RS for PDSCH to a specific DM-RS pattern according to a rank in a specific band or a specific resource block group allocated to the PDSCH and at least one resource block as described with reference to FIG. 2. can do.
  • the resource element mapper 530 includes at least one resource block allocated to the E-PDCCH DM-RS for the E-PDCCH or at least one resource block allocated to the E-PDCCH DM-RS for the E-PDCCH. It can be mapped to a specific DM-RS pattern according to the rank of the resource block group.
  • FIG. 6 shows a process of DM-RS generation and precoding according to another embodiment of the present invention.
  • a precoding matrix or a precoding matrix used for PDSCH transmission when E-PDCCH and PDSCH are transmitted through adjacent bands such as UEs 0 and 1 in FIG. 4A or FIG. 6A, a precoding matrix or a precoding matrix used for PDSCH transmission.
  • the precoding matrix or precoder used for the first layer transmission among the coders may be reused for the DM-RS transmission for the E-PDCCH and the E-PDCCH. That is, all or part of a precoder used for PDSCH transmission is reused as a precoder for E-PDCCH and DM-RS transmission for E-PDCCH.
  • Embodiments of partial reuse of PDSCH precoder for part of a precoder used for PDSCH transmission as a precoder for DM-RS transmission for E-PDCCH and E-PDCCH will be described with reference to FIGS. 7 to 17. .
  • FIG. 7 is a structural diagram of a transmitter according to another embodiment of the present invention
  • FIG. 8 illustrates a process of generating and precoding a DM-RS of the transmitter of FIG.
  • d n (n is the number of layers) is PDSCH resources or data (signals) mapped to each resource element of the PDSCH band
  • c n (n is the number of layers) is assigned to each resource element in the E-PDCCH band.
  • p n (n is the number of layers) is assigned to each DM-RS resource element of the DM-RS generated for common use in the PDSCH band and the E-PDCCH band.
  • a transmission apparatus 700 includes FIG. 5 including a reference signal generator 510, a precoder 520, and a resource element mapper 530. It is substantially the same as the transmitter 500 described with reference. However, in FIG. 7, reference numeral 720 of the precoder is displayed.
  • the reference signal generator 510 generates a DM-RS using the DM-RS sequence for the entire E-PDCCH band and the PDSCH band as shown in FIG.
  • the precoder 520 precodes the DM-RS generated as shown in (b) of FIG. 8 using a precoding matrix or a precoder and then stores the DM-RS precoded by the resource element mapper 530. Maps to the entire E-PDCCH and PDSCH bands.
  • the PDSCH resource or data is Rank 2 and the E-PDCCH resource or control information is Rank 1, for example, but the case where the rank is different may be equally applied (the same).
  • a PDSCH resources or data, as shown in Figure 7 [d 0 d 1] is a rank 2, and E-PDCCH resource or control information in the case [c 0] is the rank 1, the control information [c 0] control information to the rank 2
  • the precoder 520 converts the rank 2 data [d 0 d 1 ] and the control information [c 0 0] or [0 c 0 ] to the same rank 2. Precode using a precoding matrix or precoder [X1 X2].
  • the reference signal generator 510 uses the DM-RS sequence of rank 2 for the entire E-PDCCH band and the PDSCH band, as shown in FIG . p 1 ].
  • the precoder 720 then precodes the DM-RS [p 0 p 1 ] generated as shown in FIG. 8 (b) using a rank 2 precoding matrix or a precoder [X1 X2].
  • the resource element mapper 530 then maps the precoded DM-RS to the entire E-PDCCH and PDSCH bands.
  • the transmission apparatus 700 uses a DM-RS transmission band required for E-PDCCH decoding in order to increase the reliability or accuracy of channel estimation for the band in which the E-PDCCH is transmitted. It can be increased over the E-PDCCH and PDSCH bands.
  • FIG. 9 is a structural diagram of a transmitter according to another embodiment of the present invention, and FIG. 10 illustrates a process of generating and precoding a DM-RS of the transmitter of FIG.
  • the meanings of d n , c n , and p n are the same as in FIG. 7.
  • a transmission apparatus 900 may include a reference signal generator 510, a precoder 520, and a resource element mapper 530 in whole or in part. It is substantially the same as the transmitter 500 described with reference to FIG. However, in FIG. 9, reference numeral 920 of the precoder is indicated.
  • the reference signal generator 510 generates a DM-RS using a DM-RS sequence for the entire E-PDCCH band and the PDSCH band, and the precoder 920 generates a single layer for the E-PDCCH band. Only the DM-RS is mapped and the remaining DM-RSs for the other layers are muted.
  • the control information [c 0 ] is set to rank 2; of the control information [c 0 0] or [0 c 0], the data of the rank second modification to the precoder 920 to [d 0 d 1], and control information [c 0 0] or [0 c 0] of rank 2 Precode using a precoding matrix or precoder [X1 X2].
  • the reference signal generator 920 uses the DM-RS sequence of rank 2 for the entire E-PDCCH band and the PDSCH band, and then ranks the DM-RS of rank 2 [p 0 p 1 ]. After generating the M-RS [p 0 0] or [0 p 1 ] to modify the E-PDCCH band.
  • the reference signal generator 510 may be understood to generate the DM-RS [p 0 0] or [0 p 1 ] for the E-PDCCH band without performing the above-described modification process.
  • the precoder 920 precodes the rank 2 DM-RS [p 0 p 1 ] using the rank 2 precoding matrix or the precoder [X1 X2] for the PDSCH band, and then uses the resource element mapper 530. ) Maps the precoded DM-RS to the PDSCH band.
  • the precoder 920 converts a DM-RS [p 0 0] or [0 p 1 ] generated for the E-PDCCH band into a precoding matrix or a precoder [X1]. X2].
  • the resource element mapper 530 mutes the remaining DM-RSs for the other layers with respect to the E-PDCCH band and precodes the DM-RSs for one layer [p 0].
  • X1] or [p 1 X2] is mapped to the E-PDCCH band.
  • the precoder 920 has different layers for the E-PDCCH band as shown in FIGS. 10B and 10C. Muting the remaining DM-RSs for and pre-coding matrix or precoder [X1 0 corresponding to one layer of the precoder of the PDSCH band only DM-RS [P 0 0] or [0 P 1 ] for one layer After precoding using [] or [0 ⁇ 2], it may be understood that the resource element mapper 530 maps the precoded DM-RS to the E-PDCCH band.
  • the transmitter 900 may increase the DM-RS transmission band required for the E-PDCCH decoding to the entire E-PDCCH and PDSCH bands for at least one layer.
  • FIG. 11 is a structural diagram of a transmitter according to another embodiment of the present invention
  • FIG. 12 shows a process of generating and precoding a DM-RS of the transmitter of FIG.
  • d n , c n , and p n have the same meanings as in FIG. 7.
  • p n d represents a complex number mapped to each resource element of the DM-RS generated for use only in the PDSCH band
  • p n c represents each DM of the DM-RS generated for use only in the E-PDCCH band.
  • -Means a complex number mapped to the resource element.
  • the transmitter 1100 according to another exemplary embodiment of the present invention is substantially the same as the transmitter 500 described with reference to FIG. 5. 11, the reference numeral 1120 of the precoder is shown.
  • the reference signal generator 510 generates a DM-RS using a DM-RS sequence for the PDSCH band.
  • the precoder 1120 precodes the DM-RS generated for the PDSCH band using a precoding matrix or a precoder.
  • the reference signal generator 510 generates a DM-RS using a DM-RS sequence for the E-PDCCH band.
  • the precoder 1120 precodes the generated DM-RS using a precoder corresponding to one layer of the precoder of the PDSCH band, and then the resource element mapper 530 corresponds to a precoding matrix.
  • the DM-RS precoded by the precoder is mapped to the E-PDCCH band.
  • the reference signal generator 510 generates a DM-RS [p 0 d p 1 d ] using a DM-RS sequence for the PDSCH band as shown in FIG. 1120 is a DM-RS [p 0 d p 1 d ] generated for the PDSCH band generated as shown in Figure 12 (b) using a precoding matrix or precoder of the PDSCH band of rank 2 Precode.
  • the reference signal generation unit 510 generates a DM-RS [p 0 c ] of rank 1 using a DM-RS sequence for the E-PDCCH band as shown in FIG. 2 to DM-RS [p 0 c 0] or [0 p 0 c ].
  • Precoder 1120 corresponds to DM-RS [p 0 c 0] or [0 p 0 c ] of rank 2 generated as shown in FIG. 12 (b) to one layer of the precoder of the PDSCH band.
  • the resource element mapper 530 uses the precoding matrix corresponding to one layer or the DM-RS precoded with the precoder to E-PDCCH. Map to band.
  • the transmitter 1100 may increase the DM-RS transmission band required for the E-PDCCH decoding to the entire E-PDCCH and PDSCH bands for at least one layer.
  • FIG. 13 is a structural diagram of a transmitter according to another embodiment of the present invention
  • FIG. 14 illustrates a DM-RS generation and precoding process of the transmitter of FIG.
  • the meanings of d n , c n , and p n are the same as in FIG. 7.
  • the transmitting apparatus 1300 according to another exemplary embodiment of the present invention is substantially the same as the transmitting apparatus 500 described with reference to FIG. 5. However, in FIG. 13, reference numeral 1320 of the precoder is displayed.
  • the reference signal generator 510 generates a DM-RS using a DM-RS sequence for the entire E-PDCCH band and the PDSCH band.
  • the precoder 1320 precodes the generated DM-RS using a precoding matrix or a precoder. Thereafter, the resource element mapper 530 maps the precoded DM-RS to the entire E-PDCCH and PDSCH bands.
  • the reference signal generator 510 may generate respective DM-RSs using the respective DM-RS sequences for the E-PDCCH band and the PDSCH band gigagram.
  • the reference signal generation unit 510 uses the DM-RS sequence of rank 2 for the entire E-PDCCH band and the PDSCH band as shown in FIG . p 1 ].
  • the precoder 1320 precodes the DM-RS [p 0 p 1 ] generated as shown in FIG. 14 (b) using a rank 2 precoding matrix or a precoder, followed by the resource element mapper 530. ) Maps the pre-coded DM-RS to the entire E-PDCCH and PDSCH bands.
  • the transmitter 1300 is transmitted in the E-PDCCH band.
  • control information [c 0] a layer repeat (layer repetition) through control information of the same rank 2 to E-PDCCH rank and PDSCH rank [c 0 c 0] or [c 0 c 0 H], [c 0 H c 0 ], after adjusting to [c 0 f (c 0 )], the precoder 1320 sets the rank 2 data [d 0 d 1 ] and the control signal [c 0 c 0 ] or [c 0 c 0 H ].
  • [c 0 H c 0 ] [c 0 f (c 0 )] are precoded using a rank 2 precoding matrix or a precoder [X1, X2].
  • FIG. 15 is a structural diagram of a transmitter according to another embodiment of the present invention
  • FIG. 16 illustrates a process of generating and precoding a DM-RS of the transmitter of FIG.
  • the meanings of d n , c n , and p n are the same as in FIG. 7.
  • the reference numeral 1520 of the precoder is shown in FIG. 15.
  • the transmitting apparatus 1500 according to another exemplary embodiment of the present invention is substantially the same as the transmitting apparatus 500 described with reference to FIG. 5.
  • the reference signal generator 510 generates a DM-RS using a DM-RS sequence for the entire E-PDCCH band and the PDSCH band.
  • the precoder 1520 precodes the generated DM-RS [p 0 p 1 ] using a rank 2 precoding matrix or a precoder, and then stores the DM-RS precoded by the resource element mapper 530. -Maps to the entire PDCCH and PDSCH bands.
  • the reference signal generator 510 may generate each DM-RS using each DM-RS sequence for each of the E-PDCCH band and the PDSCH band.
  • the precoder 1520 is configured to obtain data of rank 2 [d 0]. , d 1 ] and control signal [c 0 c 1 ] are spatially multiplexed using a rank 2 precoding matrix or a precoder [X1, X2]. At this time, with E-PDCCH resource bit repetition, the E-PDCCH resource stream size is doubled and mapped to two layers after coding and modulation.
  • FIG. 17 shows a process of DM-RS generation and precoding according to another embodiment of the present invention.
  • a plurality of resource blocks or The DM-RS may be mapped to the entire resource block group 471-3 to which the E-PDCCH is mapped to increase the accuracy of channel estimation required for E-PDCCH decoding.
  • DM-RS generation and precoding according to another embodiment of the present invention described with reference to FIG. 17 is performed by the transmitter 500 described with reference to FIG.
  • the reference signal generator 510, the precoder 520, and the resource element mapper 530 perform the above-described DM-RS generation and precoding processes.
  • the resource element mapper 530 may map the precoded DM-RS not only to the E-PDCCH band but also to a band where the PDSCH is not present.
  • the DM-RS in which the resource element mapper 530 is not precoded without precoding the DM-RS may be mapped not only to the E-PDCCH band but also to a band in which no PDSCH exists.
  • a transmitter for performing DM-RS generation and precoding processes may use a PDSCH as well as an E-PDCCH band for DM-RS transmission bands necessary for E-PDCCH decoding. Can be increased to a nonexistent band.
  • FIG. 18 illustrates a process of DM-RS generation and precoding according to another embodiment of the present invention.
  • a UE has a legacy transmission mode PDSCH 226 that does not use DM-RS in an E-PDCCH band 366 and the same resource block group (RBG) 471-3, or UE 2 If the legacy transmission mode PDSCH does not use the DM-RS in the E-PDCCH peripheral band for 2, the PDSCH muting band (226) by defining zero power DM-RS for the PDSCH and performing PDSCH muting (226) DM-RS for E-PDCCH may be mapped to UE 2 in the.
  • the legacy transmission mode PDSCH does not use the DM-RS in the E-PDCCH peripheral band for 2
  • the PDSCH muting band (226) by defining zero power DM-RS for the PDSCH and performing PDSCH muting (226) DM-RS for E-PDCCH may be mapped to UE 2 in the.
  • DM-RS generation and precoding according to another embodiment of the present invention described with reference to FIG. 18 is performed by the transmitter 500 described with reference to FIG.
  • the reference signal generator 510, the precoder 520, and the resource element mapper 530 perform the above-described DM-RS generation and precoding processes.
  • the resource element mapper 530 may map the DM-RS to the aforementioned PDSCH muting band as well as the E-PDCCH band.
  • a transmitter for performing a process of generating and precoding DM-RS includes not only the E-PDCCH band but also the DM-RS transmission band required for E-PDCCH decoding. It can be increased to the PDSCH muting band.
  • FIG. 19 illustrates a process of DM-RS generation and precoding according to another embodiment of the present invention.
  • the DM-RS for each terminal may be mapped to each of the different DM-RS layers.
  • the process of generating and precoding DM-RS described with reference to FIG. 19 is performed by the transmitter 500 described with reference to FIG. 5.
  • the reference signal generator 510, the precoder 520, and the resource element mapper 530 perform the above-described DM-RS generation and precoding processes.
  • the resource element mapper 530 maps the non-precoded DM-RS to each of the different DM-RS layers for each UE not only in its own E-PDCCH band but also in the E-PDCCH band of the other UE or the same resource block group. can do.
  • a transmitter for performing DM-RS generation and precoding processes may use the E-PDCCH band as well as the E-PDCCH band for the DM-RS transmission band required for E-PDCCH decoding. It can be increased to the PDCCH band or the same resource block group.
  • 20 illustrates a process of DM-RS generation and precoding according to another embodiment of the present invention.
  • 21 is a structural diagram of a transmission apparatus according to another embodiment of the present invention.
  • the DM-RS for estimating the E-PDCCH channel located in the adjacent band may be overlapped on the same band using the multi-rank DM-RS.
  • each DM-RS is not only transmitted simultaneously but also precoded by a different precoding matrix or a precoder. That is, the DM-RS of UE0 is precoded by the precoding matrix or the precoder [X1] for UE0 by the precoder 2120 while being transmitted through the DM-RS first layer, and the DM-RS of UE1 is the DM-RS. It is transmitted through the second layer and is precoded by the precoder 2120 or by the precoder [X2] by the precoder 2120.
  • the DM-RS for the E-PDCCH of the UE0 is mapped and transmitted to the port 7 by the resource element mapper 2130, and the DM-RS for the E-PDCCH of the UE1 may be mapped and transmitted to the port 8 or the port 9.
  • the DM-RS for UE0 is mapped on the same band to the DM-RS first layer (port 7) and the DM-RS for UE 1 is mapped on the same band to the DM-RS second layer (port 8 or port 9). Can be sent.
  • the resource element mapper 2130 may use the DM-RS of UE 0.
  • the DM-RS of the RS and the UE 1 may be mapped to other resource elements of the DM-RS ports 7 and 9.
  • the number of E-PDCCHs mapped to each resource block group may be limited.
  • each terminal should be aware in advance of the information on which DM-RS port is the DM-RS port that it should receive when measuring the DM-RS for receiving the E-PDCCH.
  • the information on this port may be delivered to the terminal semi-statically through RRC signaling or determined by the location of the resource block to which the E-PDCCH is mapped. For example, in case of UE0, the E-PDCCH is received at the first resource block in the resource block group, thereby receiving the DM-RS through the DM-RS port 7. UE1 can receive the DM-RS through the DM-RS port 8 by receiving the E-PDCCH through the second resource block in the resource block group.
  • 22 is a flowchart illustrating a method of transmitting a DM-RS according to another embodiment of the present invention.
  • DM-RS transmission method 2200 includes a reference signal generation step (S2210), precoding step (S2220), resource element mapping step (S2230).
  • a DM-RS is generated for control information of a specific terminal, and the DM-RS for the control information generated in the precoding step S2220 is included in the precoding matrix for the data signal.
  • Pre-coding is performed using all or part, and in the resource element mapping step (S2230), the DM-RSs for the control information are mapped to some bands to which control information is mapped among the data areas in a subframe including the control area and the data area. .
  • the relationship between the DM-RS for the control information and the DM-RS for the data signal and the rank relationship between the control information and the data signal are as described with reference to FIGS. 7 to 15.
  • a DM-RS is generated for the control information of a specific terminal, and in the resource element mapping step S2230, control information of the data area is included in the subframe including the control area and the data area.
  • the DM-RSs for the control information may be mapped to some bands to be mapped and other bands to which the control information is not mapped.
  • bands to which control information is not mapped may be a band without the PDSCH of FIG. 17 or a PDSCH band without using the DM-RS of FIG. 18, an E-PDCCH band of another terminal of FIG. 19, and FIGS. 20 and 20. As described above, it may be the E-PDCCH band of another UE.
  • the control information of the specific terminal is added.
  • the DM-RS may be mapped to a layer different from a layer to which the DM-RS for control information of another specific terminal is mapped.
  • the control information may be stored in the precoding step (S2220).
  • the DM-RS may be precoded using a precoding matrix different from a precoding matrix for precoding the DM-RS for control information of another specific UE.
  • the DM-RS for the control information of the specific terminal may be mapped to a layer different from the layer to which the DM-RS for the control information of the other specific terminal is mapped.
  • FIG. 23 is a structural diagram of a receiving apparatus according to another embodiment of the present invention.
  • a reception apparatus 2300 may include a resource element demapper 2310 for demapping radio resources of a received signal into a complex symbol, and a post decoder or predecoding of the demapped complex symbol.
  • Post-decoder 2320 for pre-coding using a coding matrix
  • channel estimation 2330 for estimating downlink channels
  • channel decoder 2340 for decoding data and control information from post-decoded complex symbols.
  • the resource element demapper 2310 and the post-decoder 2320 operate in reverse with the resource element mapper 530 and the precoder 520 described with reference to FIGS. 5 to 21.
  • the post-decoder 2320 receives the E-PDCCH and the PDSCH through the adjacent band
  • the partial decoder of the PDSCH precoder used for the PDSCH transmission is divided into the DM- for the E-PDCCH and the E-PDCCH. Partial reuse of PDSCH precoder is used to post-decode a post-decoder or a precoding matrix for RS transmission.
  • the post-decoder 2320 may transmit the DM to the entire resource block group to which the resource blocks or the E-PDCCH are mapped. Demap the RS.
  • the post-decoder 220 demaps the DM-RS for the E-PDCCH from the PDSCH muting band in which zero power DM-RS is defined for the PDSCH.
  • the receiver 2300 may receive the DM-RS from the E-PDCCH band and another band, for example, the PDSCH band, the same resource block group as the E-PDCCH band, or at least one resource block different from the E-PDCCH band. Can be.
  • the channel estimator 2330 may estimate downlink channel information using the CRS received from the entire system band.
  • the channel estimator 2330 is a downlink precoded using the DM-RS received from not only the E-PDCCH band but also other bands, for example, the PDSCH band, the same resource block group as the E-PDCCH band, or at least one other resource block.
  • Link channel and virtual channel information can be estimated.
  • the channel estimator 2330 estimates virtual channel information by interpolating DM-RSs received from other bands as well as the E-PDCCH band, rather than estimating virtual channel information using only the DM-RS received from the E-PDCCH band. The accuracy or reliability of the virtual channel information can be improved.
  • the channel decoder 2340 decodes the control information by using the channel information estimated by the channel estimator 2330. In addition, the channel decoder 2340 decodes the data from the data signal received from the post-decoder 2320 using the control information and the virtual channel information estimated by the channel estimator 23230.
  • the receiver 2300 estimates a virtual channel using DM-RSs received in the DM-RS transmission band required for E-PDCCH decoding, and decodes the E-PDCCH using this virtual channel information. It can increase the reliability or accuracy of decoding.
  • FIG. 24 is a flowchart of a DM-RS receiving method according to another embodiment of the present invention.
  • the DM-RS receiving method 2400 includes all or part of a resource element demapping step S2410, a post decoding step S2420, and a channel estimation step S2430.
  • the DM-RS of the control information is de-mapped from a signal received in a band to which control information is mapped among the data areas in a subframe including the control area and the data area.
  • the DM-RS for the de-mapped control information in the post decoding step S2420 is post-decoded using all or part of the precoding matrix for the data signal.
  • the virtual channel is estimated using the post-decoding step S2420 and the DM-RS for the post-decoded control information.
  • the relationship between the DM-RS for the control information and the DM-RS for the data signal, and the rank relationship between the control information and the data signal are as described with reference to FIGS. 7 to 15.
  • the DM for the control information from a signal received in a band to which control information is mapped among the data regions and another band to which the control information is not mapped. De-mapping the RS and estimating the virtual channel using the DM-RS for the demapping control information in the channel estimation step S2430.
  • the other band to which the control information is not mapped may be a band without the PDSCH of FIG. 17 or a PDSCH band without using the DM-RS of FIG. 18, an E-PDCCH band of another terminal of FIG. 19, and another terminal of FIG. 20.
  • the E-PDCCH band may be.
  • control information of the specific terminal when another band to which control information is not mapped as described above with reference to FIG. 19 is a band to which control information of another specific terminal is mapped in the data region, in the resource element demapping step S2410, control information of the specific terminal.
  • the DM-RS for may be de-mapped from a layer different from a layer to which the DM-RS for control information of another specific UE is mapped.
  • the DM-RS for the control information in the post decoding step (S2420). May be post-decoded using a precoding matrix different from a precoding matrix for precoding a DM-RS for control information of another specific UE.
  • the DM-RS for control information of a specific terminal may be de-mapped from a layer different from a layer to which the DM-RS for control information of another specific terminal is mapped.
  • FIG. 25 is a result graph of improved accuracy of E-PDCCH decoding according to a DM-RS transmission band required for E-PDCCH decoding.

Abstract

La présente invention concerne : un procédé d'émission-réception d'informations de commande qui sont transmises à une partie des bandes dans une région de données d'un système de communication ; un signal de référence associé aux informations de commande ; et un appareil d'émission-réception desdites informations.
PCT/KR2012/006001 2011-08-01 2012-07-27 Procédé de transmission de signal de référence, appareil de transmission de signal de référence, procédé de réception de signal de référence et appareil de réception de signal de référence WO2013019031A2 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014161142A1 (fr) * 2013-04-01 2014-10-09 Panasonic Intellectual Property Corporation Of America Terminal, station de base, procédé de génération de signal de référence de démodulation (dmrs) et procédé de transmission
CN108023704A (zh) * 2016-11-04 2018-05-11 华为技术有限公司 一种传输参考信号的方法、网络侧设备和用户设备
US11689255B2 (en) * 2015-05-15 2023-06-27 Sony Corporation Wireless communication system, and device and method in wireless communication system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100086431A (ko) * 2009-01-22 2010-07-30 엘지전자 주식회사 다중안테나를 사용하는 송신기에서 참조신호 전송방법
KR20100124677A (ko) * 2009-05-19 2010-11-29 엘지전자 주식회사 제어 정보를 전송하는 방법 및 장치
JP2011142617A (ja) * 2010-01-11 2011-07-21 Ntt Docomo Inc マルチユーザマルチ入力マルチ出力（ｍｕ−ｍｉｍｏ）伝送方法
JP2011142602A (ja) * 2009-12-07 2011-07-21 Kddi R & D Laboratories Inc 無線通信方法および無線通信装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100086431A (ko) * 2009-01-22 2010-07-30 엘지전자 주식회사 다중안테나를 사용하는 송신기에서 참조신호 전송방법
KR20100124677A (ko) * 2009-05-19 2010-11-29 엘지전자 주식회사 제어 정보를 전송하는 방법 및 장치
JP2011142602A (ja) * 2009-12-07 2011-07-21 Kddi R & D Laboratories Inc 無線通信方法および無線通信装置
JP2011142617A (ja) * 2010-01-11 2011-07-21 Ntt Docomo Inc マルチユーザマルチ入力マルチ出力（ｍｕ−ｍｉｍｏ）伝送方法

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11540265B2 (en) 2013-04-01 2022-12-27 Panasonic Intellectual Property Corporation Of America Terminal and communication method
CN105191464A (zh) * 2013-04-01 2015-12-23 松下电器（美国）知识产权公司 终端、基站、dmrs生成方法以及发送方法
US9844046B2 (en) 2013-04-01 2017-12-12 Panasonic Intellectual Property Corporation Of America Terminal, base station, method of generating DMRS, and transmission method
WO2014161142A1 (fr) * 2013-04-01 2014-10-09 Panasonic Intellectual Property Corporation Of America Terminal, station de base, procédé de génération de signal de référence de démodulation (dmrs) et procédé de transmission
US10085252B2 (en) 2013-04-01 2018-09-25 Panasonic Intellectual Property Corporation Of America Terminal, base station, method of generating DMRS, and transmission method
CN105191464B (zh) * 2013-04-01 2019-05-10 松下电器（美国）知识产权公司 终端、基站、dmrs生成方法以及发送方法
US10531448B2 (en) 2013-04-01 2020-01-07 Panasonic Intellectual Property Corporation Of America Terminal, base station, method of generating DMRS, and transmission method
US11864204B2 (en) 2013-04-01 2024-01-02 Panasonic Intellectual Property Corporation Of America Terminal and communication method
US10912075B2 (en) 2013-04-01 2021-02-02 Panasonic Intellectual Property Corporation Of America Communication apparatus and method thereof
US11689255B2 (en) * 2015-05-15 2023-06-27 Sony Corporation Wireless communication system, and device and method in wireless communication system
CN108023704A (zh) * 2016-11-04 2018-05-11 华为技术有限公司 一种传输参考信号的方法、网络侧设备和用户设备
US11190321B2 (en) 2016-11-04 2021-11-30 Huawei Technologies Co., Ltd. Reference signal transmission method, network side apparatus, and user equipment
CN108023704B (zh) * 2016-11-04 2021-10-26 华为技术有限公司 一种传输参考信号的方法、网络侧设备和用户设备
EP3528417A4 (fr) * 2016-11-04 2020-02-12 Huawei Technologies Co., Ltd. Procédé de transmission de signal de référence, dispositif sur le côté réseau, et équipement d'utilisateur

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