CN103944686B - The CSI feedback method and device of multi-user MIMO system - Google Patents
The CSI feedback method and device of multi-user MIMO system Download PDFInfo
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Abstract
The present invention relates to multi-user MIMO transmissions technology.A kind of method of the information feedback for multi-input multi-output system is provided in one embodiment, including：It is determined that the first measurement resource collection and the second measurement resource collection for the channel condition information of a user equipment；It is silent in interferometry resource in the described first measurement resource collection, send signal in the interferometry resource in the described second measurement resource collection；The single user channel condition information of the user equipment is determined according to the feedback on the described first measurement resource collection, the multiuser channel status information of the user equipment is determined according to the feedback on the described second measurement resource collection.Technical scheme in the present invention is suitable to multiuser MIMO pattern.
Description
Technical field
The present invention relates generally to mobile communication technology, more particularly, to multi-user's multiple-input and multiple-output
(MultipleUser Multiple Input Multiple Output, MU MIMO) transmission technology.
Background technology
In such as Long Term Evolution project (Long Term Evolution, LTE) Modern Mobile Communications Systems, base station
For downlink (downlink, DL) and up-link (uplink, UL) determine used in transformat, transport block size,
Modulation and coding scheme, MIMO transmission pattern etc..In order to carry out such determination for downlink, base station is needed to use by oneself
The information of the performance on present downlink channel of family equipment (User Equipment, UE), commonly known as channel shape
State information (Channel State Information, CSI).
The tenth edition publishing standard (LTE Release10) of LTE and its before technical standard in, because existing CSI is anti-
Feedback pattern is suitable for single user multiple-input and multiple-output (SU MIMO) pattern, and multiuser MIMO pattern is not observed compared to list
The significant performance gain of user's MIMO mode.
The content of the invention
A primary object of the present invention is to provide the technical scheme of the new CSI feedback for MU-MIMO system simultaneously
Drawbacks described above of the prior art can be overcome.
According to one embodiment of present invention, there is provided a kind of channel condition information for multi-input multi-output system is anti-
The method of feedback, including：It is determined that the first measurement resource collection and the second measurement for the channel condition information of a user equipment
Resource collection；It is silent in interferometry resource in the described first measurement resource collection, measure resource collection described second
In interferometry resource on send signal；Determine that the user sets according to the feedback on the described first measurement resource collection
Standby single user channel condition information, the user equipment is determined according to the feedback on the described second measurement resource collection
Multiuser channel status information.
Can be that a user equipment is determined under CSI and multi-user mode under single user mode by the above method
CSI.Comprehensive multiple respective single user CSI and multi-user CSI of user equipment, be compared based on overall performance Optimality Criteria and
Selection, can be that each user equipment determines corresponding Single User MIMO transmission mode or multi-user MIMO transmissions pattern.
In a specific embodiment of this method, in addition to：Message is sent with to user equipment instruction described the
One measurement resource collection and the second measurement resource collection.
In a specific embodiment of this method, the zero energy channel status letter in the described second measurement resource collection
The pre-coding matrix of signal sent on breath reference signal resource is pre- with the data-signal that is carried in identical physical resources block
Encoder matrix is mutually orthogonal.
In a specific embodiment of this method, in addition to：Message is sent to indicate the user equipment with difference side
Formula performs the feedback on the described first measurement resource collection and described on the described second measurement resource collection
Feedback.More specifically, the differential mode includes：Feed back the CQI of a data flow on the described first measurement resource collection
Actual value, feed back at least one difference relative to the actual value in other CQI.
It is described on the described first feedback for measuring resource collection and described in a specific embodiment of this method
Feedback on the described second measurement resource collection uses identical feedback model.
In a specific embodiment of this method, the described first measurement resource collection and the second measurement resource collection are set
Put the limitation of different sum of ranks codebook subsets.
According to another embodiment of the invention, there is provided a kind of dress of base station equipment for multi-input multi-output system
Put, including：First module, it is configured to determine that the first measurement resource set of the channel condition information for a user equipment
Close and second measures resource collection；Second module, it is configured as the interferometry money in the described first measurement resource collection
It is silent on source, send signal in the interferometry resource in the described second measurement resource collection；3rd module, it is configured as
The single user channel condition information of the user equipment is determined according to the feedback on the described first measurement resource collection, according to
The multiuser channel status information of the user equipment is determined on the feedback of the described second measurement resource collection.
In a specific embodiment of the device, second module is additionally configured to send message with to the user
The equipment instruction first measurement resource collection and the second measurement resource collection.
In a specific embodiment of the device, the zero energy channel status letter in the described second measurement resource collection
The pre-coding matrix of signal sent on breath reference signal resource is pre- with the data-signal that is carried in identical physical resources block
Encoder matrix is mutually orthogonal.
In a specific embodiment of the device, second module is additionally configured to send message to indicate the use
Family equipment performs described on the described first feedback for measuring resource collection and described on described second in a differential manner
Measure the feedback of resource collection.More specifically, the differential mode includes：Feed back one on the described first measurement resource collection
The CQI of individual data flow actual value, feed back at least one difference relative to the actual value in other CQI.
It is described on the described first feedback for measuring resource collection and described in a specific embodiment of the device
Feedback on the described second measurement resource collection uses identical feedback model.
In a specific embodiment of the device, to the described first measurement resource collection and second in first module
Measure the limitation that resource collection sets different sum of ranks codebook subsets.
According to still a further embodiment, there is provided a kind of base station equipment for multi-input multi-output system, its
Including aforementioned means.
According to still another embodiment of the invention, there is provided a kind of channel condition information for multi-input multi-output system
The method of feedback, including：The measurement resource collection of detection first and the second measurement resource collection；Perform in a differential manner on institute
State the information feedback of the first measurement resource collection and the channel condition information on the described second measurement resource collection
Feedback.More specifically, the differential mode includes：Feed back the CQI of a data flow on the described first measurement resource collection
Actual value, feed back at least one difference relative to the actual value in other CQI.
It is described on the described first feedback for measuring resource collection and described in a specific embodiment of this method
Feedback on the described second measurement resource collection uses identical feedback model.
According to another preferred embodiment, there is provided a kind of user equipment for multi-input multi-output system
Device, including：Detection module, it is configured as the measurement resource collection of detection first and the second measurement resource collection；Feedback module,
It is configured as in a differential manner to perform on the information feedback of the described first measurement resource collection and on institute
State the information feedback of the second measurement resource collection.More specifically, the differential mode includes：Feedback is on described the
The CQI of one data flow of one measurement resource collection actual value, feeds back at least one relative to the actual value in other CQI
Difference.
It is described on the described first feedback for measuring resource collection and described in a specific embodiment of the device
Feedback on the described second measurement resource collection uses identical feedback model.
According to another preferred embodiment, there is provided a kind of user equipment for multi-input multi-output system,
It includes aforementioned means.
Foregoing has outlined the technical characteristic of the present invention and advantage to cause the detailed description below the present invention to be more readily understood.
Other features and advantages of the present invention will be described below, and which form the claimed subject matter of the present invention.This area skill
Art personnel will be understood that disclosed concept and embodiment can be easily used as changing or design it is other be used to realizing with
The structure of identical purpose of the present invention or the basis of flow.It should also be understood by those skilled in the art that such equivalent constructions are not
Away from the spirit and scope of appended claims.
Brief description of the drawings
With reference to accompanying drawing, the detailed description below in relation to the preferred embodiments of the present invention will become apparent to.The present invention is to lift
The mode of example is explained, and is not limited to accompanying drawing, and similar reference indicates similar element in accompanying drawing.
Fig. 1 shows application scenarios schematic diagram according to an embodiment of the invention；
Fig. 2 shows the flow chart of CSI feedback method according to an embodiment of the invention；
Fig. 3 shows the device 10 according to an embodiment of the invention for being configured at base station equipment and is configured at user and sets
The structured flowchart of standby device 20.
Embodiment
The detailed description of accompanying drawing is intended to the explanation as currently preferred embodiment of the invention, and is not intended to represent the present invention
The only form that can be achieved.It should be understood that identical or equivalent function can be by being intended to be contained in essence of the invention
Different embodiments of the god with the scope of are completed.
Those skilled in the art will be understood that means and function described herein can use combine programmable microprocessor and
The software function of all-purpose computer is realized to realize, and/or using ASIC (ASIC).It will also be understood that
It is that, although the present invention is mainly illustrated in the form of method and apparatus, the present invention can also be embodied as computer program production
Product and the system comprising computer processor He the memory for being connected to processor, wherein memory use can be completed to take off herein
One or more programs of the function of showing encode.
Fig. 1 shows application scenarios schematic diagram according to an embodiment of the invention.Technical scheme is suitable to
Multi-input multi-output system.As illustrated, the scene includes base station equipment 1 and user equipment 2.Technical scheme is fitted
In, such as, but not limited to, the CSI feedback between base station equipment 1 and user equipment 2.Those skilled in the art will be understood that herein
In alleged base station or base station equipment be such as, but not limited to node B (Node B) of the LTE system either in lte-a system or enter
Change node B (evolved Node B, eNB), technical scheme is also not necessarily limited to be applicable LTE system or lte-a system.
Fig. 2 shows the flow chart of the CSI feedback method according to an embodiment of the invention suitable for mimo system.Such as
Shown in figure, this method 200 is included as the step 211 performed by base station equipment 1,213,215 and 217, and by the institute of user equipment 2
The step 222 of execution and 224.As it is known, in LTE-A series standard specifications, channel condition information process is had been defined for
(CSI process), eNB are that UE distributes the detection that CSI process are used for CSI.CSIprocess includes non-zero power channel
State information reference signals (NZP CSI RS) resource and zero energy channel state information reference signals (ZP CSI RS) resource,
And zero energy channel state information reference signals (ZP CSI RS) resource can further include interferometry (IM) resource.
Base station equipment 1 determines the first measurement resource collection of the channel condition information for user equipment 2 in step 211
With the second measurement resource collection.Those skilled in the art will be understood that when suitable for different consensus standards, " surveying here
Corresponding definition or the term that amount resource collection " can be corresponded respectively in different protocol standards.When suitable for lte-a system,
" measurement resource collection " corresponds to " CSI process ".First measurement resource collection and the second measurement resource collection namely the
One CSI process and the 2nd CSI process.Generally, in the two CSI process comprising NZPCSI RS resources and
IM resources.The single user CSI that first measurement resource collection (the first CSI process) is used for user equipment 2 is detected, usually not
The limitation of order and code book.And the second measurement resource collection (the 2nd CSI process) is used for the multi-user CSI of user equipment 2
Detection, order can be generally limited to 1, code book then limits corresponding to order.
In step 213, base station equipment 1 send message with to user equipment 2 indicate it is described first measurement resource collection and
Second measurement resource collection, that is, the first and second CSI process.
In step 215, it is silent in interferometry resource of the base station equipment 1 in the first measurement resource collection (not send out
Signal, keep zero energy), and send signal in the interferometry resource in the second measurement resource collection.
More specifically, signal transmitted in interferometry resource in the second measurement resource collection can be simulation
The data-signal and/or control signal of multi-user interference signal, possibly even other users equipment.For example, base station equipment 1 can
To send random signal in the interferometry resource in the second measurement resource collection, and it is the precoding of random signal selection
The precoding of matrix and the data-signal being carried in same Physical Resource Block (Physical Resource Block, PRB)
Matrix is mutually orthogonal, and multi-user interference is simulated with this.Then user equipment 2 carries out detection to the second measurement resource collection to obtain
To the channel condition information suitable for multi-user mode.Further, by the selection to sending modes such as pre-coding matrixes and
Control, the other users equipment that random simulation multi-user interference signal can also be substituted for outside user equipment 2 it is true
Data-signal, then the CSI detections suitable for multi-user mode can not only be realized, also can transmit number using interferometry resource
According to so as to improve the utilization rate of Radio Resource.
In step 222, the measurement resource collection of the detection of user equipment 2 first and the second measurement resource collection.Generally, user
Equipment 2 need not learn the difference of the first measurement resource collection and the second measurement resource collection when sending, and it is in an identical manner
First measurement resource collection and the second measurement resource collection are detected.
In step 224, user equipment 2 feeds back to base station equipment 1 and believed on the channel status of the first measurement resource collection
Breath and the channel condition information on the second measurement resource collection.Institute's feedack such as, but not limited to includes the following
At least one of：Channel quality instruction (CQI), pre-coding matrix index (PMI), the order (rank) of channel transfer matrices.
In step 217, base station equipment 1 determines user equipment 2 according to the feedback on the first measurement resource collection
Single user channel condition information, the multiuser channel of user equipment 2 is determined according to the feedback on the second measurement resource collection
Status information.Afterwards, base station equipment 1 integrates multiple user equipmenies respective single user CSI and multi-user CSI, based on bulking property
Energy Optimality Criteria is compared and selected, and can be that each user equipment determine corresponding Single User MIMO transmission mode or more
User's MIMO transmission pattern.
In a change case of the above method, in addition to as the step performed by base station equipment 1：Message is sent to indicate
User equipment 2 performs the feedback on the first measurement resource collection in a differential manner and described measured on second provides
The feedback of source set.Then in step 224, user equipment 2 performs the CSI on the first measurement resource collection in a differential manner
Feedback and the CSI feedback on the second measurement resource collection.Then the first CSI process can be considered with reference to CSI
Process, and the 2nd CSI process can be considered subordinate CSI process.Specifically, user equipment 2 is to the first CSI
Process feedback includes the CQI of a data flow or multiple data flows, also includes this to the 2nd CSI process feedback
The CQI of one data flow or multiple data flows.The CQI feedback of first CSI process one of data flow is used in fact
Actual value, and feed back the difference relative to a reference value using the CQI actual values as a reference value, other CQI.Due on
An one CSI process data flow or the CQI of multiple data flows and this data on the 2nd CSI process
Stream or the CQI of multiple data flows are the channel qualities that same user equipment detects, between other each CQI and a reference value
The dynamic range of difference is typically smaller than the dynamic range of a reference value, therefore can use the quantization ratio more less than a reference value to difference
It is special.For example, CQI a reference values are encoded using 4 bit quantizations, and other CQI difference feedback can use 1-3 bit quantizations to compile
Code.Therefore, feedback overhead can be saved by carrying out the feedback of the first and second measurement resource collections in a differential manner.
In a specific embodiment of the above method, on the feedback of the described first measurement resource collection and on institute
The feedback for stating the second measurement resource collection uses identical feedback model.Specifically, the first CSI process and second
CSIprocess is using identical band width configuration, subpattern configuration, antenna configuration etc..
In a specific embodiment of the above method, base station equipment 1 is in step 211 to the described first measurement resource set
Close the limitation of the sum of ranks codebook subset different with the second measurement resource collection setting.Specifically, the first measurement resource collection is used for
The CSI feedback of single user mode, sum of ranks codebook subset can not be limited；Second measurement resource collection is used for multi-user mode
CSI feedback, order can be limited to 1 and corresponding limitation is done to codebook subset.Correspondingly, base station equipment 1 will also send message
Or signaling is with limit of the instruction user equipment 2 on the first measurement resource collection and the sum of ranks codebook subset of the second measurement resource collection
System.
Fig. 3 shows the structured flowchart of device 10 and device 20 according to an embodiment of the invention.Device 10 is usual
It is configured in the such as, but not limited to base station equipment of base station equipment 1.Device 20 is generally disposed in such as, but not limited to user equipment 2
User equipment in.As illustrated, device 10 includes the first module 11, the second module 12, the 3rd module 13 and receiving module
14；Device 20 includes detection module 21 and feedback module 22.
First module 11 is configured to determine that the first measurement resource set of the channel condition information for a user equipment
Close and second measures resource collection, corresponding to the step 211 performed in preceding method 200.
Second module 12 is configured as silence in the interferometry resource in the described first measurement resource collection, described
Signal is sent in interferometry resource in second measurement resource collection, corresponding to the step 215 performed in preceding method 200.
As a sending module, the second module 12 can be additionally configured to perform the step 213 in preceding method 200.
3rd module 13 is configured as determining that the user sets according to the feedback on the described first measurement resource collection
Standby single user channel condition information, the user equipment is determined according to the feedback on the described second measurement resource collection
Multiuser channel status information, corresponding to the step 217 performed in preceding method 200.
Receiving module 14 is configured as reception signal, such as the feedback signal from user equipment 2.
Detection module 21 is configured as the measurement resource collection of detection first and the second measurement resource collection, before execution
State the step 222 in method 200.
Feedback module 22 be configured to base station equipment feedback on first measurement resource collection channel condition information and
On the channel condition information of the second measurement resource collection, corresponding to the step 224 performed in preceding method 200.Feedback module
22 can be configured as in a differential manner to perform information feedback and the pass on the described first measurement resource collection
In the information feedback of the described second measurement resource collection.
Those skilled in the art will be understood that the function of any of the above-described module can divide by multiple entity modules or function mould
Block performs, and the function of above-mentioned multiple modules can also be integrated in an entity module or functional module to perform.
Although having illustrated and having described different embodiments of the invention, the present invention is not limited to these embodiments.Right
The ordinal numbers such as " first " that occurs in it is required that, " second " function only as the effect of difference, and are not meant between corresponding component
Any specific order or annexation be present.The technical characteristic only occurred in some claims or embodiment also simultaneously unawareness
Taste, which, can not be combined with other features in other claims or embodiment to realize beneficial new technical scheme.Not
In the case of the spirit and scope of the present invention as described by claims, it is many modification, change, deformation, substitute with
And equally it will be apparent to those skilled in the art.
Claims (22)
1. a kind of method of information feedback for multi-input multi-output system, including：
It is determined that the first channel condition information process and second channel state for the channel condition information of a user equipment are believed
Breath process；
It is silent in interferometry resource in the first channel condition information process, enter in the second channel status information
Signal is sent in interferometry resource in journey；
According to feeding back to determine the single user channel status of the user equipment on the first channel condition information process
Information, according to feeding back to determine the multiuser channel state of the user equipment on the second channel status information process
Information.
2. the method as described in claim 1, it is characterised in that also include：
Message is sent to indicate that the first channel condition information process and second channel status information are entered to the user equipment
Journey.
3. the method as described in claim 1, it is characterised in that the zero energy letter in the second channel status information process
The pre-coding matrix of the signal sent on channel state information reference signal resource and the data being carried in identical physical resources block
The pre-coding matrix of signal is mutually orthogonal.
4. the method as described in claim 1, it is characterised in that also include：
Message is sent to indicate the user equipment in a differential manner to perform described on first channel condition information to enter
The feedback of journey and the feedback on the second channel status information process.
5. method as claimed in claim 4, it is characterised in that the differential mode includes：Feedback is on first channel
The CQI of one data flow of status information process actual value, at least one in other CQI is fed back relative to the actual value
Difference.
6. the method as described in claim 1, it is characterised in that the feedback on the first channel condition information process
And the feedback on the second channel status information process uses identical feedback model.
7. the method as described in claim 1, it is characterised in that to the first channel condition information process and second channel shape
State information process sets the limitation of different sum of ranks codebook subsets.
8. a kind of device of base station equipment for multi-input multi-output system, including：
First module, it is configured to determine that the first channel condition information of the channel condition information for a user equipment enters
Journey and second channel status information process；
Second module, it is configured as silence in the interferometry resource in the first channel condition information process, in institute
State and send signal in the interferometry resource in second channel status information process；
3rd module, it is configured as determining that the user sets according to the feedback on the first channel condition information process
Standby single user channel condition information, determine that the user sets according to the feedback on the second channel status information process
Standby multiuser channel status information.
9. device as claimed in claim 8, it is characterised in that second module is additionally configured to send message with to described
User equipment indicates the first channel condition information process and second channel status information process.
10. device as claimed in claim 8, it is characterised in that the zero energy in the second channel status information process
The pre-coding matrix of the signal sent in channel state information reference signals resource and the number being carried in identical physical resources block
It is believed that number pre-coding matrix it is mutually orthogonal.
11. device as claimed in claim 8, it is characterised in that second module is additionally configured to send message to indicate
The user equipment performs the feedback on the first channel condition information process and the pass in a differential manner
In the feedback of the second channel status information process.
12. device as claimed in claim 11, it is characterised in that the differential mode includes：Feedback is on the described first letter
The CQI of one data flow of channel state information process actual value, feed back at least one relative to the actual value in other CQI
Difference.
13. device as claimed in claim 8, it is characterised in that described on the anti-of the first channel condition information process
Feedback and the feedback on the second channel status information process use identical feedback model.
14. device as claimed in claim 8, it is characterised in that to first channel condition information in first module
Process and second channel status information process set the limitation of different sum of ranks codebook subsets.
15. a kind of base station equipment for multi-input multi-output system, it includes the dress any one of claim 8-14
Put.
16. a kind of method of information feedback for multi-input multi-output system, including：
Detect the first channel condition information process and second channel status information process；
It is silent in interferometry resource in the first channel condition information process, enter in the second channel status information
Signal is sent in interferometry resource in journey；
Perform in a differential manner on the information feedback of the first channel condition information process and on described
The information feedback of second channel status information process.
17. method as claimed in claim 16, it is characterised in that described on the anti-of the first channel condition information process
Feedback and the feedback on the second channel status information process use identical feedback model.
18. method as claimed in claim 16, it is characterised in that the differential mode includes：Feedback is on the described first letter
The CQI of one data flow of channel state information process actual value, feed back at least one relative to the actual value in other CQI
Difference.
19. a kind of device of user equipment for multi-input multi-output system, including：
Detection module, it is configured as detecting the first channel condition information process and second channel status information process；
First module, it is configured as silence in the interferometry resource in the first channel condition information process, in institute
State and send signal in the interferometry resource in second channel status information process；
Feedback module, it is configured as in a differential manner to perform the channel status on the first channel condition information process
Feedback of the information and the information feedback on the second channel status information process.
20. device as claimed in claim 19, it is characterised in that described on the anti-of the first channel condition information process
Feedback and the feedback on the second channel status information process use identical feedback model.
21. device as claimed in claim 19, it is characterised in that the differential mode includes：Feedback is on the described first letter
The CQI of one data flow of channel state information process actual value, feed back at least one relative to the actual value in other CQI
Difference.
22. a kind of user equipment for multi-input multi-output system, it includes the dress any one of claim 19-21
Put.
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162695B (en) * | 2015-04-10 | 2020-04-28 | 上海诺基亚贝尔股份有限公司 | Method and device for interference measurement of unlicensed frequency band |
| CN106301509B (en) * | 2015-05-21 | 2020-01-17 | 电信科学技术研究院 | Channel state information feedback method and terminal |
| US10075218B2 (en) * | 2015-11-05 | 2018-09-11 | Samsung Electronics Co., Ltd. | Method and apparatus for FD-MIMO based multicasting in vehicular communication systems |
| CN105722234B (en) | 2016-02-05 | 2019-11-08 | 北京佰才邦技术有限公司 | Method, base station and the terminal of resource are dispatched in unauthorized frequency range |
| CN107370533B (en) * | 2016-05-12 | 2020-09-25 | 上海诺基亚贝尔股份有限公司 | Method, device and system for carrying out analog CSI feedback |
| CN114727424A (en) | 2016-06-15 | 2022-07-08 | 康维达无线有限责任公司 | Unlicensed uplink transmission for new radio |
| CN116366112A (en) * | 2016-09-30 | 2023-06-30 | 中兴通讯股份有限公司 | Feedback method and device for channel information |
| EP3520243A2 (en) * | 2016-11-03 | 2019-08-07 | Convida Wireless, LLC | Frame structure in nr |
| CN109600199B (en) * | 2017-09-30 | 2021-01-08 | 维沃移动通信有限公司 | Method and device for feeding back multi-user channel state information |
| CN109803309B (en) * | 2017-11-17 | 2021-06-29 | 华为技术有限公司 | Communication method and device |
| WO2019162917A1 (en) * | 2018-02-26 | 2019-08-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Channel state information (csi) feedback with multiple hypotheses |
| WO2020041951A1 (en) * | 2018-08-27 | 2020-03-05 | Nec Corporation | Method, device and computer readable medium for iab transmission |
| WO2020068251A1 (en) | 2018-09-27 | 2020-04-02 | Convida Wireless, Llc | Sub-band operations in unlicensed spectrums of new radio |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801498A (en) * | 2012-07-25 | 2012-11-28 | 电信科学技术研究院 | Method and equipment for reporting and determining sub-band feedback selected by terminal equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030125040A1 (en) * | 2001-11-06 | 2003-07-03 | Walton Jay R. | Multiple-access multiple-input multiple-output (MIMO) communication system |
| US7941186B2 (en) * | 2006-07-25 | 2011-05-10 | Samsung Electronics Co., Ltd. | Apparatus and method for scheduling multiuser/single user in multiple input multiple output (MIMO) system |
| US8271043B2 (en) * | 2006-08-21 | 2012-09-18 | Qualcomm Incorporated | Approach to a unified SU-MIMO/MU-MIMO operation |
| CN102104994B (en) * | 2009-12-21 | 2015-03-25 | 上海贝尔股份有限公司 | Method for transmitting data to users in MIMO (Multiple Input Multiple Output) system and base station |
| CN102237903A (en) * | 2010-05-06 | 2011-11-09 | 中兴通讯股份有限公司 | Data transmission method and device for MIMO (multi-input multi-output) system |
| CN101931513B (en) * | 2010-05-18 | 2016-06-15 | 中兴通讯股份有限公司 | The feedback method of channel condition information and terminal |
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