CN102164027A - Method and device for feeding back precoding matrix indexes - Google Patents
Method and device for feeding back precoding matrix indexes Download PDFInfo
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Abstract
The invention discloses a method and device for feeding back precoding matrix indexes, wherein the method comprises the following steps: determining a rank-r precoding matrix of SU-MIMO (single user multiple input multiple output) and a rank-1 precoding matrix of MU-MIMO (multi-user multiple input multiple output), wherein r is greater than 1, and the rank-1 precoding matrix of MU-MIMO is the best rank-1 precoding matrix in the rank-r precoding matrix of SU-MIMO; according to the position of the rank-1 precoding matrix of MU-MIMO in the rank-r precoding matrix of SU-MIMO, determining the offset of the PMI of the rank-1 precoding matrix of MU-MIMO relative to the PMI of the rank-r precoding matrix of SU-MIMO; and feeding back the PMI of the rank-r precoding matrix of SU-MIMO and the offset. By using the method and device disclosed by the invention, the expense for feeding back precoding matrix indexes can be reduced.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of pre-coding matrix index feedback method and device.
Background technology
At LTE-A (Long Time EvolutionAdvanced, the senior evolution of Long Term Evolution) in the system, descending support SU-MIMO (the Single user Multiple Input Multiple Output that needs, single user's multiple-input, multiple-output) transfer of data of transmission mode and MU-MIMO (Multi-user Multiple Input Multiple Output, multi-user's multiple-input, multiple-output) transmission mode.
When the user is in closed loop precoding pattern following time, may be in the SU-MIMO transmission mode, also may be in the MU-MIMO transmission mode.Can dynamically switch between SU-MIMO transmission mode and the MU-MIMO transmission mode.UE (User Equipment, subscriber equipment) is under the transmission mode of SU-MIMO, and the Rank that UE reports (order) may be r such as order greater than 1, r＞1.Under the SU-MIMO transmission mode, the UE feedback is used for PMI (the precoding matrix index of the order r of SU-MIMO transmission mode, pre-coding matrix index), and the order of this SU-MIMO be the CQI (Channel Quality Indicator, channel quality indication) of the PMI correspondence of r.But the base station is considered from total system, may be made into the MU-MIMO transmission mode to this UE.Under the MU-MIMO transmission mode, may only carry out the transmission of order 1.The base station is from the PMI of the order r that is used for SU-MIMO of UE feedback, and the CQI of the PMI correspondence of the order r of this SU-MIMO, and the order that can't obtain to be used for the MU-MIMO transmission mode accurately is 1 PMI and CQI.
If report the PMI that is used for SU-MIMO transmission mode and MU-MIMO transmission mode simultaneously, feedback overhead can be bigger.
Summary of the invention
Pre-coding matrix index feedback method and device that the embodiment of the invention provides can make the expense of pre-coding matrix index feedback reduce.
The pre-coding matrix index feedback method that the embodiment of the invention provides, can realize by following scheme:
Determine the order r pre-coding matrix of SU-MIMO and order 1 pre-coding matrix of MU-MIMO, wherein, r＞1, order 1 pre-coding matrix of described MU-MIMO is, best order 1 pre-coding matrix in the order r pre-coding matrix of described SU-MIMO;
In the position of the order r of described SU-MIMO pre-coding matrix, the PMI of order 1 pre-coding matrix that determines described MU-MIMO is with respect to the side-play amount of the PMI of the order r pre-coding matrix of described SU-MIMO according to order 1 pre-coding matrix of described MU-MIMO;
Feed back the PMI of the order r pre-coding matrix of described SU-MIMO, and described side-play amount.
The subscriber equipment that the embodiment of the invention provides can be achieved through the following technical solutions:
This subscriber equipment comprises: processing module: be used for determining the order r pre-coding matrix of SU-MIMO and order 1 pre-coding matrix of MU-MIMO, wherein, r＞1, order 1 pre-coding matrix of described MU-MIMO is, best order 1 pre-coding matrix in the order r pre-coding matrix of described SU-MIMO;
Generation module: the position of the order r pre-coding matrix of the described SU-MIMO that order 1 pre-coding matrix that is used for the described MU-MIMO that determines according to described processing module is determined in described processing module, the PMI of order 1 pre-coding matrix that determines described MU-MIMO is with respect to the side-play amount of the PMI of the order r pre-coding matrix of described SU-MIMO;
Sending module: be used to feed back the PMI of the order r pre-coding matrix of the described SU-MIMO that described processing module determines, and the described side-play amount that generates of described generation module.
Pre-coding matrix index feedback method and device that the embodiment of the invention provides, UE need not feed back the PMI of SU-MIMO and the PMI of MU-MIMO simultaneously, can reduce the expense of feedback.The base station can be according to the PMI of the order r of the SU-MIMO of UE feedback, and after the side-play amount, determines the PMI of the order 1 of MU-MIMO.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The pre-coding matrix index feedback method schematic diagram that provides of the embodiment of the invention is provided Fig. 1;
Another pre-coding matrix index feedback method schematic diagram that provides of the embodiment of the invention is provided Fig. 2;
The another pre-coding matrix index feedback method schematic diagram that provides of the embodiment of the invention is provided Fig. 3; With
A kind of user device architecture schematic diagram that Fig. 4 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
As shown in Figure 1, the pre-coding matrix index feedback method schematic diagram for the embodiment of the invention provides comprises:
101, determine the order r pre-coding matrix of SU-MIMO and order 1 pre-coding matrix of MU-MIMO, order 1 pre-coding matrix of this MU-MIMO is, best order 1 pre-coding matrix in the order r pre-coding matrix of SU-MIMO;
Wherein, r＞1.
102, according to order 1 pre-coding matrix of MU-MIMO in the position of the order r of SU-MIMO pre-coding matrix, the PMI of order 1 pre-coding matrix that determines described MU-MIMO is with respect to the side-play amount of the PMI of the order r pre-coding matrix of described SU-MIMO;
The pre-coding matrix that obtains according to PMI.
103, feed back the PMI of the order r pre-coding matrix of this SU-MIMO, and this side-play amount.
The pre-coding matrix index feedback method that uses the invention process to provide, UE need not feed back the PMI of SU-MIMO and the PMI of MU-MIMO simultaneously, can reduce the expense of feedback.The base station can be according to the PMI of the order r of the SU-MIMO of UE feedback, and after the side-play amount, determines the PMI of the order 1 of MU-MIMO.
As shown in Figure 2, the another kind of pre-coding matrix index feedback method schematic diagram that the embodiment of the invention provides comprises:
201, terminal is from all order r pre-coding matrixes, select the order r pre-coding matrix of best order r pre-coding matrix as SU-MIMO, from the r row of the order r pre-coding matrix of SU-MIMO, select order 1 pre-coding matrix of a best column rank 1 pre-coding matrix as MU-MIMO;
Wherein, r＞1.
202, in the position of the order r of SU-MIMO pre-coding matrix, the PMI of order 1 pre-coding matrix that determines MU-MIMO is with respect to the side-play amount of the PMI of the order r pre-coding matrix of SU-MIMO according to order 1 pre-coding matrix of MU-MIMO for terminal;
203, terminal is fed back the PMI of the order r pre-coding matrix of this SU-MIMO, and side-play amount.
Wherein, when terminal is fed back this side-play amount, can use this side-play amount of n bit feedback M, wherein
When
The time, the PMI of the order 1 of MU-MIMO can be determined according to PMI and the side-play amount of order r of the SU-MIMO of feedback in the base station.At this moment, because UE need not feed back the PMI of SU-MIMO and the PMI of MU-MIMO simultaneously, can reduce the expense of feedback.
When
The time, the expense of terminal feedback further reduces.But
The time need be in the base station, the selection set of order 1 pre-coding matrix of default MU-MIMO, the base station is according to the selection set of order 1 pre-coding matrix of default MU-MIMO, and the PMI of the order 1 of the MU-MIMO that determines of the PMI of the order r of the SU-MIMO of feedback and side-play amount.
As shown in Figure 3, the another kind of pre-coding matrix index feedback method schematic diagram that the embodiment of the invention provides comprises:
301, from all row of all order r pre-coding matrixes, select order 1 pre-coding matrix of best order 1 pre-coding matrix as MU-MIMO, the order r pre-coding matrix at order 1 pre-coding matrix place of determining this MU-MIMO is as the order r pre-coding matrix of SU-MIMO;
Wherein, r＞1.
302, similar with step 202, can not repeat here referring to step 202;
303, similar with step 202, can not repeat here referring to step 203.
The embodiment of the invention because UE need not feed back the PMI of SU-MIMO and the PMI of MU-MIMO simultaneously, can reduce the expense of feedback.
Owing in the pre-coding matrix of higher rank, may all be fit to the MU-MIMO transmission by not every row.The scene of MU-MIMO transmission is more suitable for the antenna of strong correlation, is more suitable for the scene of MU-MIMO transmission such as the code book based on DFT (Discrete Fourtier Transform, discrete Fourier transform).
In the embodiment of the invention, can preset the selection set of order 1 pre-coding matrix of MU-MIMO in end side, UE will select order 1 pre-coding matrix with the selection sets match of order 1 pre-coding matrix of default MU-MIMO when determining order 1 pre-coding matrix of MU-MIMO.Just, in the various embodiments described above,, when determining order 1 pre-coding matrix of MU-MIMO, select order 1 pre-coding matrix with the selection sets match of order 1 pre-coding matrix of default MU-MIMO such as 101 steps at Fig. 1; Such as in 201 steps of Fig. 2, from the r row of the order r pre-coding matrix of SU-MIMO, select and a best column rank 1 pre-coding matrix of the selection sets match of order 1 pre-coding matrix of default MU-MIMO order 1 pre-coding matrix as MU-MIMO; Such as in 301 steps of Fig. 3, from all row of all order r pre-coding matrixes, best order 1 pre-coding matrix of the selection sets match of order 1 pre-coding matrix of the MU-MIMO that selects and preset is as order 1 pre-coding matrix of MU-MIMO.
Preset the selection set of order 1 pre-coding matrix of MU-MIMO in end side, make terminal can select more suitably order 1 pre-coding matrix of MU-MIMO, make terminal can feed back the side-play amount of the PMI of the order 1 of MU-MIMO more suitably with respect to the PMI of the order r of SU-MIMO, thereby make base station this side-play amount more suitably, determine the more suitably PMI of the order 1 of MU-MIMO according to feedback.
Wherein, the selection of order 1 pre-coding matrix of Yu She MU-MIMO set can be for using order 1 pre-coding matrix of the pairing code word correspondence of linear receiver.This linear receiver can be MMSE (Minimum Mean Square Error, least mean-square error) receiver, or ZF (Zero Forcing, ZF) receiver.Can use linear receiver in the fixing some code words of terminal, and order 1 pre-coding matrix of this code word correspondence, be the selection set of order 1 pre-coding matrix of default MU-MIMO.
In using SU-MIMO, if the transmission of order 2 when the UE end uses linear receiver, when order 1 transmission that obtains MU-MIMO can be implied according to CQI in the base station, is used the pre-coding matrix of which row of which order 2 pre-coding matrixes as MU-MIMO.Such as hypothesis CQI1 correspondence be first row of pre-coding matrix of the order 2 of SU-MIMO, the CQI2 correspondence be the secondary series of pre-coding matrix of the order 2 of SU-MIMO.As CQI2＞CQI1, at this moment obtain according to the CQI of order 2 can be with the secondary series of the pre-coding matrix of the order 2 of the SU-MIMO pre-coding matrix as MU-MIMO in the base station.
If SIC (Serial Interference Cancellation, serial interference elimination) receiver, then which row of the pre-encoding codeword that obtains order 2 that can not imply by CQI are that the transmission that is used for MU-MIMO is preferably.So, consider and might use the SIC receiver.Can stipulate the MMSE receiver that first code word is only used, the 2nd code word used the SIC receiver.Like this, for MU-MIMO, can only be used for first code word the deviant PMI of vector be used for the MU-MIMO pattern.
As shown in Figure 4, a kind of user device architecture schematic diagram that the embodiment of the invention provides comprises:
Subscriber equipment 400 comprises: processing module 401, generation module 402 and sending module 403.
Wherein, processing module 401 is used for determining the order r pre-coding matrix of SU-MIMO and order 1 pre-coding matrix of MU-MIMO, wherein, r＞1, order 1 pre-coding matrix of this MU-MIMO is, best order 1 pre-coding matrix in the order r pre-coding matrix of SU-MIMO;
The subscriber equipment that uses the invention process to provide, UE need not feed back the PMI of SU-MIMO and the PMI of MU-MIMO simultaneously, can reduce the expense of feedback.The base station can be according to the PMI of the order r of the SU-MIMO of UE feedback, and after the side-play amount, determines the PMI of the order 1 of MU-MIMO.
The embodiment of the invention provides in the another kind of user device architecture schematic diagram, and this processing module 401 can comprise selected cell one and/or selected cell two.
Wherein, selected cell 1, be used for from all order r pre-coding matrixes, select the order r pre-coding matrix of best order r pre-coding matrix as SU-MIMO, from the r row of the order r pre-coding matrix of this SU-MIMO, select order 1 pre-coding matrix of a best column rank 1 pre-coding matrix as MU-MIMO.
Selected cell 2 4012, be used for all row from all order r pre-coding matrixes, select order 1 pre-coding matrix of best order 1 pre-coding matrix as MU-MIMO, the order r pre-coding matrix at order 1 pre-coding matrix place of determining this MU-MIMO is as the order r pre-coding matrix of SU-MIMO.
The embodiment of the invention provides in the another kind of user device architecture schematic diagram, also comprises a memory module, and this memory module 1 is used to store the selection set of order 1 pre-coding matrix of default MU-MIMO.
At this moment, selected cell 1, specifically be used for from all order r pre-coding matrixes, select the order r pre-coding matrix of best order r pre-coding matrix as SU-MIMO, from the r row of the order r pre-coding matrix of this SU-MIMO, select and a best column rank 1 pre-coding matrix of the selection sets match of order 1 pre-coding matrix of the default MU-MIMO of memory module storage 404 order 1 pre-coding matrix as MU-MIMO.
Selected cell 2 4012, be used for all row from all order r pre-coding matrixes, select and best order 1 pre-coding matrix of the selection sets match of order 1 pre-coding matrix of the default MU-MIMO of memory module 404 storages order 1 pre-coding matrix as MU-MIMO, the order r pre-coding matrix at order 1 pre-coding matrix place of determining this MU-MIMO is as the order r pre-coding matrix of SU-MIMO.
In another subscriber equipment that provides in embodiments of the present invention, sending module adopts the above-mentioned side-play amount of n bit feedback, if
The time, so that the PMI of order 1 pre-coding matrix of MU-MIMO according to the PMI and the side-play amount of this SU-MIMO order r pre-coding matrix of feedback, is determined in the base station; If
The time so that the base station according to the feedback
The PMI and the side-play amount of SU-MIMO order r pre-coding matrix, and the selection of order 1 pre-coding matrix of default MU-MIMO set are determined the PMI of order 1 pre-coding matrix of MU-MIMO.
The subscriber equipment that uses the invention process to provide, UE need not feed back the PMI of SU-MIMO and the PMI of MU-MIMO simultaneously, can reduce the expense of feedback.The base station can be according to the PMI of the order r of the SU-MIMO of UE feedback, and after the side-play amount, determines the PMI of the order 1 of MU-MIMO.
In the pre-coding matrix index feedback method that the enforcement the invention process provides, the base station that provides in the embodiment of the invention comprises receiver module and determination module.
Receiver module be used to receive the PMI of order r pre-coding matrix of the SU-MIMO of subscriber equipment feedback, and the PMI of order 1 pre-coding matrix of MU-MIMO is with respect to the side-play amount of the PMI of the order r pre-coding matrix of SU-MIMO.Wherein, wherein, r＞1, order 1 pre-coding matrix of MU-MIMO is, best order 1 pre-coding matrix in the order r pre-coding matrix of SU-MIMO.
Determination module, the PMI of order 1 pre-coding matrix that is used for the PMI of order r pre-coding matrix of the SU-MIMO that receives according to receiver module and MU-MIMO determines the PMI of order 1 pre-coding matrix of MU-MIMO with respect to the side-play amount of the PMI of the order r pre-coding matrix of SU-MIMO.
Wherein, the PMI of order 1 pre-coding matrix that adopts this MU-MIMO of n bit feedback when subscriber equipment is with respect to the side-play amount of the PMI of the order r pre-coding matrix of SU-MIMO, if
The time, determination module is determined the PMI of order 1 pre-coding matrix of MU-MIMO according to PMI and this side-play amount of this SU-MIMO order r pre-coding matrix of feedback.
The base station can also comprise a memory module two, if
The time, the base station also so that the base station according to the PMI and the side-play amount of SU-MIMO order r pre-coding matrix of feedback, the PMI of order 1 pre-coding matrix of MU-MIMO is determined in and the selection set of order 1 pre-coding matrix of the default MU-MIMO that preserves in the memory module two.
When using the base station that the invention process provides, UE need not feed back the PMI of SU-MIMO and the PMI of MU-MIMO simultaneously, can reduce the expense of feedback.The base station can be according to the PMI of the order r of the SU-MIMO of UE feedback, and after the side-play amount, determines the PMI of the order 1 of MU-MIMO.
Be understandable that, only be schematic in the accompanying drawing or shown in the embodiment, the presentation logic structure, the wherein said module that shows as separating component may or may not be physically to separate, the parts that show as module may be or may not be physical locations, promptly can be positioned at a place, perhaps be distributed on several network entities.
More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for help understanding method and apparatus of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, description should not be construed as limitation of the present invention.
Claims (8)
1. a pre-coding matrix index feedback method is characterized in that, comprising:
Determine SU-MIMO (Single user Multiple Input Multiple Output, single user's multiple-input, multiple-output) order r pre-coding matrix and MU-MIMO (Multi-user Multiple Input Multiple Output, multi-user's multiple-input, multiple-output) order 1 pre-coding matrix, wherein, r＞1, order 1 pre-coding matrix of described MU-MIMO is, best order 1 pre-coding matrix in the order r pre-coding matrix of described SU-MIMO;
According to order 1 pre-coding matrix of described MU-MIMO position at the order r of described SU-MIMO pre-coding matrix, determine the side-play amount of the PMI (precoding matrix index, pre-coding matrix index) of order 1 pre-coding matrix of described MU-MIMO with respect to the PMI of the order r pre-coding matrix of described SU-MIMO;
Feed back the PMI of the order r pre-coding matrix of described SU-MIMO, and described side-play amount.
2. the method for claim 1 is characterized in that, order 1 pre-coding matrix of the order r pre-coding matrix of described definite SU-MIMO and MU-MIMO comprises:
From all order r pre-coding matrixes, select the order r pre-coding matrix of best order r pre-coding matrix as SU-MIMO, from the r row of the order r pre-coding matrix of described SU-MIMO, select order 1 pre-coding matrix of a best column rank 1 pre-coding matrix as MU-MIMO; Perhaps,
From all row of all order r pre-coding matrixes, select order 1 pre-coding matrix of best order 1 pre-coding matrix as MU-MIMO, the order r pre-coding matrix at order 1 pre-coding matrix place of determining described MU-MIMO is as the order r pre-coding matrix of SU-MIMO.
3. method as claimed in claim 2, it is characterized in that, the r row of described order r pre-coding matrix from described SU-MIMO, select a best column rank 1 pre-coding matrix specifically to comprise: from the r row of the order r pre-coding matrix of described SU-MIMO, to select and a best column rank 1 pre-coding matrix of the selection sets match of order 1 pre-coding matrix of default MU-MIMO order 1 pre-coding matrix as MU-MIMO as order 1 pre-coding matrix of MU-MIMO; Perhaps,
Described from all row of all order r pre-coding matrixes, select best order 1 pre-coding matrix specifically to comprise as order 1 pre-coding matrix of MU-MIMO: from all row of all order r pre-coding matrixes, best order 1 pre-coding matrix of the selection sets match of order 1 pre-coding matrix of the MU-MIMO that selects and preset is as order 1 pre-coding matrix of MU-MIMO.
4. the method for claim 1 is characterized in that, feeds back described side-play amount and is specially:
Adopt the described side-play amount of n bit feedback, if
The time, so that the PMI of order 1 pre-coding matrix of described MU-MIMO according to the PMI and the described side-play amount of the described SU-MIMO order r pre-coding matrix of feedback, is determined in the base station; If
The time, so that the base station is according to the PMI and the described side-play amount of described SU-MIMO order r pre-coding matrix of feedback, and the selection of order 1 pre-coding matrix of default MU-MIMO set, determine the PMI of order 1 pre-coding matrix of described MU-MIMO.
5. as claim 3 or 4 described methods, it is characterized in that the choice set of order 1 pre-coding matrix of default MU-MIMO is combined into: be order 1 pre-coding matrix of the code word correspondence of using linear receiver.
6. a subscriber equipment is characterized in that, comprising:
Processing module: be used for determining SU-MIMO (Single user Multiple Input Multiple Output, single user's multiple-input, multiple-output) order r pre-coding matrix and MU-MIMO (Multi-user Multiple Input Multiple Output, multi-user's multiple-input, multiple-output) order 1 pre-coding matrix, wherein, r＞1, order 1 pre-coding matrix of described MU-MIMO is, best order 1 pre-coding matrix in the order r pre-coding matrix of described SU-MIMO;
Generation module: the position of the order r pre-coding matrix of the described SU-MIMO that order 1 pre-coding matrix that is used for the described MU-MIMO that determines according to described processing module is determined in described processing module, determine the side-play amount of the PMI (precoding matrix index, pre-coding matrix index) of order 1 pre-coding matrix of described MU-MIMO with respect to the PMI of the order r pre-coding matrix of described SU-MIMO;
Sending module: be used to feed back the PMI of the order r pre-coding matrix of the described SU-MIMO that described processing module determines, and the described side-play amount that generates of described generation module.
7. subscriber equipment as claimed in claim 6 is characterized in that: described processing module comprises:
Selected cell one, be used for from all order r pre-coding matrixes, select the order r pre-coding matrix of best order r pre-coding matrix as SU-MIMO, from the r row of the order r pre-coding matrix of described SU-MIMO, select order 1 pre-coding matrix of a best column rank 1 pre-coding matrix as MU-MIMO; And/or
Selected cell two, be used for all row from all order r pre-coding matrixes, select order 1 pre-coding matrix of best order 1 pre-coding matrix as MU-MIMO, the order r pre-coding matrix at order 1 pre-coding matrix place of determining described MU-MIMO is as the order r pre-coding matrix of SU-MIMO.
8. subscriber equipment as claimed in claim 7 is characterized in that: further comprise:
Memory module: be used to store the selection set of order 1 pre-coding matrix of default MU-MIMO;
Described selected cell one, specifically be used for from all order r pre-coding matrixes, select the order r pre-coding matrix of best order r pre-coding matrix as SU-MIMO, from the r row of the order r pre-coding matrix of described SU-MIMO, select and a best column rank 1 pre-coding matrix of the selection sets match of order 1 pre-coding matrix of the default MU-MIMO of memory module storage order 1 pre-coding matrix as MU-MIMO; And/or
Described selected cell two, specifically be used for all row from all order r pre-coding matrixes, select and best order 1 pre-coding matrix of the selection sets match of order 1 pre-coding matrix of the default MU-MIMO of memory module storage order 1 pre-coding matrix as MU-MIMO, the order r pre-coding matrix at order 1 pre-coding matrix place of determining described MU-MIMO is as the order r pre-coding matrix of SU-MIMO.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102932899A (en) * | 2011-08-12 | 2013-02-13 | 华为技术有限公司 | Method for transporting pre-coding controlling indication information, base station and user device |
| CN103812603A (en) * | 2012-11-12 | 2014-05-21 | 华为技术有限公司 | SUMIMO/MUMIMO dynamic switching feedback method and device |
| WO2014134876A1 (en) * | 2013-03-08 | 2014-09-12 | 华为技术有限公司 | Precoding matrix indication feedback method, and receiving end and transmitting end |
| CN104303442A (en) * | 2013-03-08 | 2015-01-21 | 华为技术有限公司 | Precoding Matrix Indication Feedback Method, And Receiving End And Transmitting End |
| WO2016201647A1 (en) * | 2015-06-17 | 2016-12-22 | Intel Corporation | Method for determining a precoding matrix and precoding module |
| WO2018119562A1 (en) * | 2016-12-26 | 2018-07-05 | 华为技术有限公司 | Data transmission method and base station |
| WO2022016373A1 (en) * | 2020-07-21 | 2022-01-27 | 华为技术有限公司 | Information transmission method, network device, user equipment, system, and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101277172A (en) * | 2007-03-30 | 2008-10-01 | 华为技术有限公司 | Method, apparatus and system for generating precoding matrix |
| US20080298482A1 (en) * | 2007-05-30 | 2008-12-04 | Rensburg Cornelius Van | Multi-user MIMO feedback and transmission in a wireless communication system |
| CN101594208A (en) * | 2009-06-24 | 2009-12-02 | 中兴通讯股份有限公司 | A kind of method of allocating pre-coding matrix |
-
2010
- 2010-02-24 CN CN201010116842.5A patent/CN102164027B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101277172A (en) * | 2007-03-30 | 2008-10-01 | 华为技术有限公司 | Method, apparatus and system for generating precoding matrix |
| US20080298482A1 (en) * | 2007-05-30 | 2008-12-04 | Rensburg Cornelius Van | Multi-user MIMO feedback and transmission in a wireless communication system |
| CN101594208A (en) * | 2009-06-24 | 2009-12-02 | 中兴通讯股份有限公司 | A kind of method of allocating pre-coding matrix |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102932899A (en) * | 2011-08-12 | 2013-02-13 | 华为技术有限公司 | Method for transporting pre-coding controlling indication information, base station and user device |
| CN102932899B (en) * | 2011-08-12 | 2015-07-22 | 华为技术有限公司 | Method for transporting pre-coding controlling indication information, base station and user device |
| CN103812603A (en) * | 2012-11-12 | 2014-05-21 | 华为技术有限公司 | SUMIMO/MUMIMO dynamic switching feedback method and device |
| WO2014134876A1 (en) * | 2013-03-08 | 2014-09-12 | 华为技术有限公司 | Precoding matrix indication feedback method, and receiving end and transmitting end |
| CN104303442A (en) * | 2013-03-08 | 2015-01-21 | 华为技术有限公司 | Precoding Matrix Indication Feedback Method, And Receiving End And Transmitting End |
| US9258044B2 (en) | 2013-03-08 | 2016-02-09 | Huawei Technologies Co., Ltd. | Method for feeding back precoding matrix indicator, receive end and transmit end |
| CN104303442B (en) * | 2013-03-08 | 2018-04-20 | 华为技术有限公司 | Feedback method, receiving terminal and the transmitting terminal of pre-coding matrix instruction |
| WO2016201647A1 (en) * | 2015-06-17 | 2016-12-22 | Intel Corporation | Method for determining a precoding matrix and precoding module |
| US10511361B2 (en) | 2015-06-17 | 2019-12-17 | Intel Corporation | Method for determining a precoding matrix and precoding module |
| WO2018119562A1 (en) * | 2016-12-26 | 2018-07-05 | 华为技术有限公司 | Data transmission method and base station |
| WO2022016373A1 (en) * | 2020-07-21 | 2022-01-27 | 华为技术有限公司 | Information transmission method, network device, user equipment, system, and electronic device |
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| CN102164027B (en) | 2014-07-30 |
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