WO2011000156A1 - Procédé et dispositif permettant de renvoyer des informations de canal et d'acquérir une matrice de canal - Google Patents

Procédé et dispositif permettant de renvoyer des informations de canal et d'acquérir une matrice de canal Download PDF

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Publication number
WO2011000156A1
WO2011000156A1 PCT/CN2009/072571 CN2009072571W WO2011000156A1 WO 2011000156 A1 WO2011000156 A1 WO 2011000156A1 CN 2009072571 W CN2009072571 W CN 2009072571W WO 2011000156 A1 WO2011000156 A1 WO 2011000156A1
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WIPO (PCT)
Prior art keywords
antenna
link
matrix
base station
chain
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PCT/CN2009/072571
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English (en)
Chinese (zh)
Inventor
张兴炜
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2009/072571 priority Critical patent/WO2011000156A1/fr
Priority to CN200980147349.5A priority patent/CN102239711B/zh
Publication of WO2011000156A1 publication Critical patent/WO2011000156A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the present invention relates to mobile communication technologies, and in particular, to a method and apparatus for feeding back channel information and acquiring a channel matrix. Background technique
  • LTE Long Term Evolution
  • MIMO Multiple Input Multiple Output
  • a base station and a terminal are each provided with a plurality of antennas (in a broad sense, the MIMO system also includes a downlink MISO or an uplink SIMO system in which a plurality of antennas are set on the base station side and a single antenna is provided on the terminal side).
  • the transmission mismatch parameter of the ith antenna of the base station on the kth subcarrier is M ( )
  • the jth antenna of the terminal exists on the kth subcarrier.
  • the receiving mismatch parameter is M RU (J, k )
  • the spatial channel matrix H DL of the link formed by the i-th antenna of the base station and the j-th antenna of the terminal on the k-th subcarrier (j, j, k is
  • H dl a, j, k) M te a, k) x H p a, j, k) ⁇ M ru (j, k) , where H p a, j, k) is the propagation channel moment P.
  • DCFB direct channel feedback
  • the embodiment of the invention provides a method for feeding back channel information, including:
  • the first link is composed of a first antenna on the base station side and a second antenna on the terminal side and a spatial propagation channel between the two links;
  • the second link includes: at least one antenna other than the second antenna by the first antenna and the terminal side And at least one link composed of a corresponding spatial propagation channel, and at least one link consisting of at least one antenna other than the first antenna and a corresponding spatial propagation channel by the second antenna and the base station side; feeding back the reference matrix
  • the ratio to the mismatch parameter is given to the base station.
  • An embodiment of the present invention provides a method for acquiring a channel matrix, including:
  • the first link is composed of a first antenna on the base station side and a second antenna on the terminal side and a spatial propagation channel between the two
  • the second link includes: dividing by the first antenna and the terminal side At least one antenna other than the second antenna and at least one link composed of a corresponding spatial propagation channel, and at least one antenna and a corresponding spatial propagation channel formed by the second antenna and the base station side except the first antenna At least one link;
  • a channel matrix of all links is obtained according to a ratio of the reference matrix and the mismatch parameter.
  • An embodiment of the present invention provides an apparatus for feeding back channel information, including:
  • a selection module configured to select a channel matrix of the first link as a reference matrix, where the first link is composed of a first antenna on the base station side and a second antenna on the terminal side and a spatial propagation channel between the two links; And a ratio of a mismatch parameter for identifying a relationship between a channel matrix of the second link and a reference matrix, where the second link includes: at least a second antenna and a terminal side except the second antenna At least one link consisting of a single antenna and a corresponding spatial propagation channel, and at least one antenna and a corresponding spatial propagation channel composed of the second antenna and the base station side except the first antenna One less link;
  • a feedback module configured to feed back a ratio of the reference matrix and the mismatch parameter to the base station.
  • An embodiment of the present invention provides an apparatus for acquiring a channel matrix, including:
  • a receiving module configured to receive a ratio of a reference matrix and a mismatch parameter sent by the terminal device, where the reference matrix is a channel matrix of the selected first link, and a ratio of the mismatch parameter is used to represent a channel of the second link a relationship between the matrix and the reference matrix
  • the first link is composed of a first antenna on the base station side and a second antenna on the terminal side and a spatial propagation channel between the two
  • the second link includes: And at least one antenna composed of at least one antenna other than the second antenna and the corresponding spatial propagation channel, and at least one antenna other than the first antenna and the corresponding antenna by the second antenna and the base station side At least one link consisting of a spatial propagation channel;
  • a calculation module configured to acquire a channel matrix of all links according to a ratio of the reference matrix and the mismatch parameter.
  • the embodiment of the present invention can reduce the ratio of the mismatch parameters of the relationship between the channel matrix of the remaining links and the reference matrix by feeding back a reference matrix, and can occupy less resources when the channel information is fed back. Overhead. DRAWINGS
  • FIG. 1 is a schematic flowchart diagram of a first method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a second method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart diagram of a third method according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic flowchart of a fourth method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart diagram of a fifth method according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic flowchart diagram of a sixth method according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a first device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a second device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a system according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic flowchart of a first method according to an embodiment of the present invention, including:
  • Step 11 The terminal device selects a channel matrix of the first link as a reference matrix, and the first chain routes a first antenna on the base station side and a second antenna on the terminal side and a spatial propagation channel between the two.
  • each link is composed of one antenna i (first antenna) on the base station side, one antenna j (second antenna) on the terminal side, and antenna i
  • the spatial propagation channel composition between (first antenna) and antenna j (second antenna) under the above assumptions, mxn links can be formed in the system.
  • the terminal device can arbitrarily select one of the m x n links as the first link.
  • Step 12 The terminal device acquires a ratio of a mismatch parameter for characterizing a relationship between a channel matrix of the second link and a reference matrix, where the second link includes: dividing the second antenna by the first antenna and the terminal side. At least one antenna consisting of at least one antenna and a corresponding spatial propagation channel, and at least one link consisting of the second antenna and the base station side except at least one antenna other than the first antenna and a corresponding spatial propagation channel,
  • the second link includes each link composed of a first antenna and a terminal side other than the second antenna and a corresponding spatial propagation channel, and the second antenna and the base station side are divided by the first antenna.
  • Step 13 The terminal device feeds back the ratio of the reference matrix and the mismatch parameter to the base station.
  • the terminal device may obtain a mismatch parameter of a channel matrix of the second link and a mismatch parameter with the reference matrix, and compare the two mismatch parameters to obtain a channel matrix between the reference matrix and the reference matrix.
  • the ratio of the mismatch parameters of the relationship is a prior art, and details are not described herein.
  • Step 21 A base station receives a ratio of a reference matrix and a mismatch parameter sent by a terminal device, where the reference matrix is a channel matrix of the selected first link.
  • the ratio of the mismatch parameter is used to represent a relationship between a channel matrix of the second link and a reference matrix, and the first link is between the first antenna on the base station side and the second antenna on the terminal side
  • the second link includes: at least one link composed of the first antenna and the terminal side except at least one antenna other than the second antenna and the corresponding spatial propagation channel, and the second antenna And at least one link composed of at least one antenna other than the first antenna and a corresponding spatial propagation channel on the base station side;
  • Step 22 The base station acquires a channel matrix of all links according to a ratio of the reference matrix and the mismatch parameter.
  • the channel matrix of each link can be calculated, and the channel matrix of each link can be obtained by occupying less resources. .
  • the base station and the terminal device are respectively exemplified by an evolved base station (eNB) and a user equipment (UE) in the LTE. It can be understood that the following embodiments can also be applied to other In the system.
  • eNB evolved base station
  • UE user equipment
  • the antennas set on the UE side are respectively represented by UE antenna 1 and UE antenna n.
  • H(i, j) is used to represent the channel matrix of the link chain(i, j) on a certain subcarrier.
  • M re (0 is the transmit antenna mismatch parameter of the ith antenna of the eNB on the subcarrier
  • M R is the receive antenna mismatch parameter of the jth antenna of the UE on the subcarrier
  • H p ( , ') is the propagation channel matrix of the link chain(i, j) on this subcarrier.
  • the propagation channel matrix between the two antennas and the same transmitting or receiving antenna at the other end can be considered to be approximated.
  • the il antenna and The i2th antenna is approximately equal to the propagation channel matrix of the link composed of the jth antenna of the UE, that is, H p ( l, O) « H p ( 2, O).
  • the propagation channel moment P of the link formed by the j1th antenna and the j2th antenna respectively and the ith antenna of the eNB are approximately equal. , ie H p ( 0, jl) - H p ( 0, jl).
  • FIG. 3 is a schematic flowchart of a third method according to an embodiment of the present invention.
  • a link chain (1, 1) is used as a first link
  • a ratio of mismatch parameters is an eNB antenna 2 to an eNB antenna m and an eNB.
  • the ratio of the mismatch parameters of the antenna 1 and the ratio of the UE antenna 2 to UE antenna n to the mismatch parameter of the UE antenna 1 are examples.
  • this embodiment includes:
  • Step 301 The UE uses the channel matrix of the chain (1, 1) link as a reference matrix.
  • the matrix H(l,l) is used as the reference matrix.
  • Step 302 The UE calculates a ratio of mismatch parameters that characterize the relationship between the channel matrix of the second link and the reference matrix, that is, calculates a ratio of the eNB antenna 2 eNB antenna m to the mismatch parameter of the eNB antenna 1 and the UE. The ratio of the antenna 2 to the UE antenna n to the mismatch parameter of the UE antenna 1 respectively.
  • the second link includes a link composed of an antenna other than the first antenna of the UE by the first antenna of the eNB, and an antenna other than the first antenna of the eNB and the first antenna of the UE, respectively.
  • the UE in this embodiment can feed back the ratio of the reference matrix and the mismatch parameter, and the eNB can recover each according to the ratio of the mismatch parameter and the reference matrix.
  • Channel matrix In order to avoid the problem that the resource overhead caused by the channel matrix of each link is relatively large, the UE in this embodiment can feed back the ratio of the reference matrix and the mismatch parameter, and the eNB can recover each according to the ratio of the mismatch parameter and the reference matrix. Channel matrix.
  • eNB antenna 1 H(l,l) r£ (1) ⁇ (1,1) ⁇ ⁇ (1) eNB antenna 2 1
  • Step 304 The eNB obtains a channel matrix of each link according to the feedback information.
  • the eNB After the eNB receives the feedback information, it needs to do the following calculations:
  • the link chain ( l , 1) it can be obtained directly, that is, the reference matrix H(l, l) of the feedback; for the link chain (i, 1), the channel matrix H(U) can be based on the link chain (i, 1) The ratio of the feedback is multiplied by the reference matrix.
  • the calculation formula is:
  • the channel matrix H(l, ) for the link chain(l, j) can be obtained by multiplying the ratio of the feedback of the link chain(l, j) with the reference matrix.
  • the calculation formula is:
  • the channel matrix of the link chain(i, j) can be obtained by multiplying the ratio of the link chain(i, 1) and the link chain(l, j) feedback with the reference matrix.
  • the calculation method for the eNB to recover the channel matrix of each link according to the feedback information can be as shown in Table 4:
  • all antennas use the channel matrix of the link chain (l, 1) as a reference, and feedback the ratio of the mismatch parameters characterizing the relationship between the corresponding channel matrix and the reference matrix. This is well satisfied with the condition that the distance between the elements of the circular array antenna or the antenna array is small. However, for a line antenna, only adjacent antennas can satisfy a small pitch. For example, antenna 1 and antenna 2 are separated by less than half a wavelength, and antenna 2 and antenna 3 are separated by less than half a wavelength, but the spacing between antenna 1 and antenna 3 may be I am not satisfied with the conditions. At this time, it is necessary to obtain the ratio of the mismatch parameters characterizing the relationship between the channel matrices of the adjacent links, instead of using the ratio of the mismatch parameters in relation to the reference matrix.
  • a first link is a link chain (1, 1)
  • a ratio of mismatch parameters is an eNB side based on eNB antenna 1.
  • the ratio of the ratio of mismatch parameters between adjacent antennas and the ratio of mismatch parameters between adjacent antennas on the UE side based on UE antenna 1 is an example. Referring to FIG. 4, this embodiment includes:
  • Step 401 The UE uses the channel matrix of the chain (1, 1) link as a reference matrix.
  • the matrix H(l,l) is used as the reference matrix.
  • Step 402 The UE calculates a ratio of mismatch parameters between adjacent antennas based on the antennas in the first link, that is, calculates a mismatch parameter between adjacent antennas on the eNB side based on the eNB antenna 1. The ratio of the ratio to the mismatch parameter between adjacent antennas on the UE side based on the UE antenna 1.
  • the second link includes a link composed of an antenna other than the first antenna of the UE by the first antenna of the eNB, and an antenna other than the first antenna of the eNB and the first antenna of the UE, respectively.
  • Step 403 The UE feeds back the ratio of the reference matrix (H(l, l)) and each of the mismatch parameters described above to the eNB.
  • Step 404 The eNB obtains a channel matrix of each link according to the feedback information.
  • the channel matrix of the link chain (l, 1) can be directly obtained, that is, the reference matrix of feedback ⁇ (1,1);
  • the channel matrix of the link chain (i, 1) can be obtained by calculating the channel matrix of the adjacent link chain (i-1, 1).
  • the channel matrix of the link chain (l, j) can be obtained by calculating the channel matrix of the adjacent link chain (l, j-1).
  • the channel matrix calculation method for the link chain(i, j) can be as follows:
  • Method 1 Calculate the channel matrix of the link chain (2, l) to the link chain (i, l) in turn, and then calculate the channel matrix of the link chain (i, 2) to the link chain (i, j) in turn;
  • Method 2 Calculate the channel matrix of the link chain (l, 2) to the link chain (l, j) in turn, and then calculate the channel matrix of the link chain (2, j) to the link chain (i, j) in turn;
  • Method 3 Obtain the channel matrix according to Method 1 and Method 2, respectively, and then obtain the geometric average or arithmetic average.
  • the calculation method for the eNB to recover the channel matrix of each link according to the feedback information can be as shown in Table 6: Table 6
  • the eNB calculates the channel matrix sequentially, and calculates the channel matrix of the adjacent link according to the sequentially calculated channel matrix. It can be understood that the eNB may directly directly calculate the feedback value and the reference matrix of each link. Directly calculate the channel matrix of the link, namely:
  • the previous method of sequentially calculating the channel matrix can avoid repeated operations and reduce the amount of calculation.
  • This method of directly calculating the link channel matrix according to the feedback value of each link and the reference matrix has a good avoidance effect on error transmission and achieves accurate Improvement, in practice, can be a combination of these two methods, a compromise between the amount of calculation and accuracy.
  • the channel matrix of the link chain (l, 1) is used as a reference, and it can be understood that the channel matrix of any one link can be used as the reference matrix.
  • the reference matrix can be taken as the channel matrix of the link composed of the intermediate antennas.
  • FIG. 5 is a schematic flowchart of a fifth method according to an embodiment of the present invention. Different from the third embodiment, this embodiment uses a channel matrix of a link chain ( ) as a reference matrix. See Figure 5,
  • the channel matrix of the link is used as a reference matrix.
  • L* means rounding down, that is, taking the most Large integer.
  • Step 502 The UE calculates, by using the antennas that represent the relationship between the channel matrix of the second link and the reference matrix. Antennas other than
  • the link composed of the antenna and the link composed of the first antenna of the UE and the eNB except the antenna, that is, the second +1, ..., n) and the chain(i.) (i l,... ,
  • Step 503 The UE feeds back the ratio of the reference matrix and the mismatched parameters obtained above to the eNB t specific link chain (
  • Step 504 The eNB obtains a channel matrix of each link according to the feedback information.
  • the eNB After the eNB receives the feedback information, it needs to do the following calculations:
  • the channel matrix of the link chain(i : - ) can be obtained by multiplying the ratio of the link chain(i::) feedback and the reference matrix by the following formula:
  • the channel matrix for the link chain(i, j) can be based on the link chain(i : ;) and the link.
  • the ratio of the chain( , j) feedback is multiplied by the reference matrix
  • the calculation method for the eNB to recover the channel matrix of each link according to the feedback information can be as shown in Table 8:
  • FIG. 6 is a schematic flowchart of a sixth method according to an embodiment of the present invention. Different from the fourth embodiment, this embodiment uses a channel matrix of a link chain ( ) as a reference matrix. See Figure 6,
  • Step 601 The UE uses a channel matrix of the chain ( ) link as a reference matrix.
  • Moment Array as a reference matrix.
  • the UE calculates a ratio of mismatch parameters between adjacent antennas based on the antennas in the first link, that is, between the adjacent antennas on the eNB side based on the eNB antenna.
  • the second link includes the antennas of the eNB and the UE except the
  • Step 604 The eNB obtains a channel matrix of each link according to the feedback information.
  • the channel matrix of the link chain (i : ) can be calculated in turn.
  • the channel matrix of the link chain ( , j) can be calculated sequentially
  • the channel matrix calculation method for link chain(i, j) can be as follows (assuming i>
  • Method 1 Calculate the channel moment of the link chain( ) to the link chain(i : :) Array, and then calculate the channel matrix of the link chain ( +1) to the link chain (i, j);
  • Method 2 Calculate the channel matrix of the link chain ( +1) to the link chain ( , j) in turn:
  • Method 3 Obtain the channel matrix according to Method 1 and Method 2, respectively, and then obtain the geometric mean or the average of the processing.
  • the eNB calculates the channel matrix sequentially, and calculates the channel matrix of the adjacent link according to the sequentially calculated channel matrix. It can be understood that the channel matrix of the link can be directly calculated according to the feedback value of each link and the reference matrix. , which is:
  • the third to sixth embodiments are based on the case where the UE has multiple antennas and the correlation between multiple antennas.
  • the UE has one antenna or multiple antennas and multiple antennas are not related, that is, two of the multiple antennas of the UE. The distance between the two antennas is not small enough.
  • the above steps need to be performed for each antenna.
  • the present invention may also include the following embodiments:
  • the information that needs to be fed back can be as shown in Table 11:
  • eNB antenna 1 H(l,l) r£ (1) ⁇ (1,1) ⁇ ⁇ (1)
  • the eNB After receiving the feedback information, the eNB can calculate the method as shown in Table 12:
  • eNB antenna 1 directly obtains H(l,l) eNB antenna 2 eNB antenna m
  • the remaining antennas of the UE also perform the above steps.
  • all the channel matrices can be recovered by the above calculation, and the same effect as DCFB is achieved, but compared with DCFB, this embodiment needs to feed back n channel matrices and (ml) ) x « values, compared with DCFB requiring feedback x « matrices, can reduce the bit overhead occupied by feedback, and greatly save air interface resources.
  • eNB antenna 1 H(l,l) r£ (1) ⁇ (1,1) ⁇ ⁇ (1)
  • the eNB After receiving the feedback information, the eNB can calculate the method as shown in Table 14:
  • eNB antenna 3 calculates H(2,l) and multiplies it by (3,1)
  • the eNB antenna m calculates H(w _ 1,1) and multiplies it by ⁇ ⁇ , ⁇ )
  • the rest of the antennas of the UE also perform the above steps.
  • all the channel matrices can be recovered by the above calculation, and the same effect as the DCFB is achieved.
  • this embodiment needs to feed back n channel matrices and 0- 1) ⁇ « values, compared with DCFB requiring feedback x « matrices, can reduce the bit overhead occupied by feedback, and greatly save air interface resources.
  • the rest of the antennas of the UE also perform the above steps.
  • all the channel matrices can be recovered by the above calculation, and the same effect as the DCFB is achieved.
  • the present embodiment needs to feed back n channel matrices and 0-1) ⁇ « values, with DCFB need feedback x « matrix phase
  • the bit overhead occupied by the feedback can be reduced, and the air interface resources are greatly saved.
  • Tenth Embodiment Corresponding to the sixth embodiment, taking the first antenna (UE antenna 1) of the UE as an example, the information that needs to be fed back can be as shown in Table 17:
  • the eNB After receiving the feedback information, the eNB receives the feedback information.
  • the rest of the antennas of the UE also perform the above steps.
  • all the channel matrices can be recovered by the above calculation, and the same effect as the DCFB is achieved.
  • this embodiment needs to feed back n channel matrices and 0- 1) ⁇ «Values, compared with DCFB requiring feedback x « matrix, can reduce the bit overhead occupied by feedback, and greatly save air interface resources.
  • FIG. 7 is a schematic structural diagram of a first apparatus according to an embodiment of the present invention, including a selection module 71, an obtaining module 72, and a feedback module 73.
  • the selecting module 71 is configured to select a channel matrix of the first link as a reference matrix
  • the obtaining module 72 is configured to obtain a ratio of a mismatch parameter that represents a relationship between a channel matrix of the second link and a reference matrix, where the second link is Including: dividing the second antenna from the first antenna and the terminal side At least one antenna other than the at least one antenna and the corresponding spatial propagation channel, and at least one chain consisting of the second antenna and the base station side except at least one antenna other than the first antenna and a corresponding spatial propagation channel
  • the feedback module 73 is configured to feed back the ratio of the reference matrix and the mismatch parameter to the base station.
  • the first link is composed of a first antenna on the base station side and a second antenna on the terminal side
  • the acquiring module includes a first unit or a second unit. a ratio of a mismatch parameter of at least one antenna other than the first antenna to a first antenna and a ratio of mismatch parameters of at least one antenna and a second antenna other than the second antenna on the terminal side;
  • the second The unit is configured to calculate, according to the first antenna on the base station side, a ratio of mismatch parameters between adjacent antennas on the base station side, and calculate a loss between adjacent antennas on the terminal side based on the second antenna on the terminal side. The ratio of the parameters.
  • the feedback module may include a third unit and a fourth unit; the third unit is configured to feed back the reference matrix to the base station by using the first link; and the fourth unit is configured to pass the second chain The road feeds back the ratio of the mismatch parameters corresponding to the second link to the base station.
  • the apparatus may be disposed on the terminal device side, and the method for determining the reference matrix and the method for calculating the ratio may be referred to the method embodiment described above.
  • FIG. 8 is a schematic structural diagram of a second device according to an embodiment of the present invention, including a receiving module 81 and a computing module 82.
  • the receiving module 81 is configured to receive a ratio of a reference matrix and a mismatch parameter sent by the terminal device, where the reference matrix is a channel matrix of the selected first link, and a ratio of the mismatch parameter is used to represent a channel of the second link.
  • the first link is composed of a first antenna on the base station side and a second antenna on the terminal side and a spatial propagation channel between the two
  • the second link includes: At least one link composed of at least one antenna other than the second antenna and the corresponding spatial propagation channel on the terminal side, and the second antenna and the base station side except the first antenna At least one link consisting of one antenna and a corresponding spatial propagation channel;
  • the calculation module 82 is configured to obtain a channel matrix of all links according to a ratio of the reference matrix and the mismatch parameter.
  • the device may be disposed on the base station side, and the method for calculating the channel matrix of each link according to the reference matrix and the ratio may be referred to the foregoing method embodiment.
  • the channel matrix of each link can be calculated, and the channel matrix of each link can be obtained by occupying less resources. .
  • FIG. 9 is a schematic structural diagram of a system according to an embodiment of the present invention, including a terminal device 91 and a base station 92.
  • the terminal device 91 is configured to select a channel matrix of the first link as a reference matrix, and obtain a ratio of a mismatch parameter for characterizing a relationship between a channel matrix of each second link and a reference matrix, where the second link includes a link in the first link to an antenna other than the antenna in the first link in the other side of the air interface; and feeding back a ratio of the reference matrix and the mismatch parameter;
  • the base station 92 is configured to receive a ratio of the reference matrix and the mismatch parameter, and acquiring a channel matrix corresponding to each link according to a ratio of the reference matrix and the mismatch parameter.
  • the terminal device in this embodiment refer to the device shown in FIG. 7.
  • the base station can refer to the device shown in FIG. 7.
  • the ratio of the mismatch parameters of the relationship between the channel matrix of the road and the reference matrix can calculate the channel matrix of each link, which can achieve the same effect as DCFB but consumes less resources.
  • the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Abstract

La présente invention se rapporte à un procédé et à un dispositif permettant de renvoyer des informations de canal et d'acquérir une matrice de canal. Le procédé permettant de renvoyer des informations de canal comprend les étapes suivantes : la matrice de canal de la première liaison est sélectionnée pour être considérée comme une matrice de référence et ladite première liaison se compose d'une première antenne du côté de la station de base et d'une seconde antenne du côté du terminal et du canal de propagation spatiale, qui est située entre ces derniers ; un rapport des paramètres de défaut de concordance pour représenter la relation entre la matrice de canal de la seconde liaison et la matrice de référence est acquis, et ladite seconde liaison comprend : au moins une liaison se composant de la première antenne et d'au moins une antenne, à l'exception de la seconde antenne du côté du terminal, et du canal de propagation spatiale correspondant, et au moins une liaison se composant de la seconde antenne et d'au moins une antenne, à l'exception de la première antenne du côté de la station de base et du canal de propagation spatiale correspondant ; le rapport de la matrice de référence et du paramètre d’erreur de concordance est renvoyé à la station de base. Le mode de réalisation de la présente invention permet d’éviter une perte d'efficacité pour renvoyer des informations de canal.
PCT/CN2009/072571 2009-07-01 2009-07-01 Procédé et dispositif permettant de renvoyer des informations de canal et d'acquérir une matrice de canal WO2011000156A1 (fr)

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PCT/CN2009/072571 WO2011000156A1 (fr) 2009-07-01 2009-07-01 Procédé et dispositif permettant de renvoyer des informations de canal et d'acquérir une matrice de canal
CN200980147349.5A CN102239711B (zh) 2009-07-01 2009-07-01 反馈信道信息和获取信道矩阵的方法和装置

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PCT/CN2009/072571 WO2011000156A1 (fr) 2009-07-01 2009-07-01 Procédé et dispositif permettant de renvoyer des informations de canal et d'acquérir une matrice de canal

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CN1691536A (zh) * 2004-04-28 2005-11-02 索尼株式会社 无线通信系统
US20060146725A1 (en) * 2004-12-30 2006-07-06 Qinghua Li Downlink transmit beamforming
CN101094021A (zh) * 2006-06-20 2007-12-26 中兴通讯股份有限公司 一种自适应多天线通信方法和装置
CN101170340A (zh) * 2007-11-22 2008-04-30 上海交通大学 低复杂度多用户多天线正交频分复用系统子信道分配方法

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US7917107B2 (en) * 2006-03-23 2011-03-29 Mitsubishi Electric Research Laboratories, Inc. Antenna selection with RF imbalance
JP4775288B2 (ja) * 2006-04-27 2011-09-21 ソニー株式会社 無線通信システム、無線通信装置及び無線通信方法

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CN1691536A (zh) * 2004-04-28 2005-11-02 索尼株式会社 无线通信系统
US20060146725A1 (en) * 2004-12-30 2006-07-06 Qinghua Li Downlink transmit beamforming
CN101094021A (zh) * 2006-06-20 2007-12-26 中兴通讯股份有限公司 一种自适应多天线通信方法和装置
CN101170340A (zh) * 2007-11-22 2008-04-30 上海交通大学 低复杂度多用户多天线正交频分复用系统子信道分配方法

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