CN106470086A - For the communication means of extensive antenna, base station and communication system - Google Patents
For the communication means of extensive antenna, base station and communication system Download PDFInfo
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- CN106470086A CN106470086A CN201510502305.7A CN201510502305A CN106470086A CN 106470086 A CN106470086 A CN 106470086A CN 201510502305 A CN201510502305 A CN 201510502305A CN 106470086 A CN106470086 A CN 106470086A
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- Prior art keywords
- terminal
- wave beam
- base station
- information reference
- state information
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
-
- 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
- H04B7/0617—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 for beam forming
Abstract
The invention discloses a kind of communication means for extensive antenna, base station and communication system.Communication means therein includes：Base station carries out wave beam forming using extensive antenna, forms some wave beams；Wave beam after figuration for the base station sends channel state information reference signals CSI-RS, and channel state information reference signals are multiplexed between different beams.Thus decreasing the running time-frequency resource of channel state information reference signals occupancy, reduce the expense of channel state information reference signals.
Description
Technical field
The present invention relates to wireless communication technology field, especially a kind of logical for extensive antenna
Letter method, base station and communication system.
Background technology
Industry extensively carries out the research of extensive antenna (Massive MIMO) technology at present,
To adapt to the needs of future network development.
Extensive antenna system based on TDD can obtain descending letter using up-downgoing reciprocity
Road information, and FDD system cannot utilize up-downgoing reciprocity.In FDD system, base
Stand and obtain descending channel information in the following manner：First, base station sends descending pilot frequency, that is, join
Examine signal；Then, user measures to reference signal, chooses the code book matching with channel
And feed back to base station.
If the method that above-mentioned FDD system is obtained descending channel information is applied directly to big rule
In mould antenna, can make that problems with is had based on the extensive antenna system of FDD：With sky
The increase of line number, the linear increase of expense of reference signal, thus affect extensive antenna bring
Performance gain.
Content of the invention
An embodiment of the present invention technical problem to be solved is：How to reduce in extensive antenna
The expense of channel state information reference signals.
One side according to embodiments of the present invention, there is provided a kind of logical for extensive antenna
Letter method, including：Base station carries out wave beam forming using extensive antenna, forms some wave beams；
Wave beam after figuration for the base station sends channel state information reference signals (CSI-RS), channel
State information reference signals are multiplexed between different beams.
In one embodiment, wave beam after figuration for the base station sends channel condition information reference
Signal includes：The upward signal that base station sends to terminal measures；Base station is according to in terminal
The measurement result of row signal determines the orientation of terminal；Base station determines to send according to the orientation of terminal and believes
The wave beam of channel state information reference signal, and channel condition information ginseng is sent on the wave beam determining
Examine signal.
In one embodiment, base station determines that according to the orientation of terminal sending channel condition information joins
The wave beam examining signal includes：Base station selects one according to the orientation of terminal from the wave beam after figuration
Send the wave beam of channel state information reference signals；Or, base station generates according to the orientation of terminal
One new wave beam, for sending channel state information reference signals.
In one embodiment, base station determines terminal according to the measurement result of terminal uplink signal
Orientation include：Base station is according to the measurement result employing arrival angle ranging to terminal uplink signal
Mode or covariance matrix mode determine the orientation of described terminal.
In one embodiment, the wave beam after described figuration adopts identical cell ID, to keep away
Exempt from terminal and continually carry out cell switching.
In one embodiment, the method that this programme provides also includes：Described base station is using wide ripple
Bundle sends public reference signal (CRS).
In one embodiment, the method that this programme provides also includes：Base station obtains terminal-pair institute
State channel state information reference signals and measure the pre-coding matrix instruction obtaining, channel quality
Instruction and/or order instruction, to determine the modulation coding mode of data.
Other side according to embodiments of the present invention, provides a kind of base station for extensive antenna,
Including：Wave beam forming unit, for carrying out wave beam forming using extensive antenna, forms some
Wave beam；Reference signal transmitting element, sends channel condition information for the wave beam after figuration
Reference signal, channel state information reference signals are multiplexed between different beams.
In one embodiment, reference signal transmitting element includes：Measurement module, for end
The upward signal that end sends measures；Orientation determining module, for believing according to terminal uplink
Number measurement result determine the orientation of terminal；Reference signal sending module, for according to terminal
Orientation determines the wave beam sending channel state information reference signals, and sends on the wave beam determining
Channel state information reference signals.
In one embodiment, reference signal transmitting element also includes：Beam selection module, uses
Select a transmission channel condition information reference in the orientation according to terminal from the wave beam after figuration
The wave beam of signal；Or, wave beam generation module, generate a use for the orientation according to terminal
To send the new wave beam of channel state information reference signals.
In one embodiment, orientation determining module was used for using arrival angle ranging mode to end
The orientation measuring and determining terminal of end upward signal；Or, orientation determining module is used for adopting
The orientation measuring and determining terminal to terminal uplink signal for the covariance matrix mode.
In one embodiment, base station also includes：Cell Identification Unit, after for figuration
Wave beam adopts identical cell ID, to avoid terminal continually to carry out cell switching.
In one embodiment, described reference signal transmitting element, be additionally operable to using broad beam to
Described terminal sends public reference signal (CRS).
In one embodiment, base station also includes：Receive feedback unit, for obtaining terminal-pair
Channel state information reference signals measure the pre-coding matrix instruction obtaining, channel quality refers to
Show and/or order instruction, to determine the modulation coding mode of data.
Other side according to embodiments of the present invention, provides a kind of communication for extensive antenna
System, including any one base station aforementioned and terminal, terminal is used for the wave beam after figuration
Intercept channel state information reference signals.
The present invention at least has advantages below：
Carry out wave beam forming using extensive antenna and form some wave beams, the wave beam after figuration
Send channel state information reference signals, and channel state information reference signals are in different beams
Between be multiplexed, thus decrease channel state information reference signals occupancy running time-frequency resource, reduce
The expense of channel state information reference signals.
By the detailed description to the exemplary embodiment of the present invention referring to the drawings, the present invention
Further feature and its advantage will be made apparent from.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will
The accompanying drawing of required use in embodiment or description of the prior art is briefly described it is clear that
Ground, drawings in the following description are only some embodiments of the present invention, the common skill for this area
For art personnel, without having to pay creative labor, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Figure 1A illustrates that the present invention is used for the flow process of one embodiment of communication means of extensive antenna
Schematic diagram.
Figure 1B illustrates that the present invention is used for the stream of another embodiment of communication means of extensive antenna
Journey schematic diagram.
Fig. 2A illustrates that the present invention is used for the stream of another embodiment of communication means of extensive antenna
Journey schematic diagram.
Fig. 2 B illustrates that the present invention is used for the stream of the communication means further embodiment of extensive antenna
Journey schematic diagram.
Fig. 3 illustrates the schematic diagram of fixed beam determination mode of the present invention.
Fig. 4 illustrates the schematic diagram of dynamic beam determination mode of the present invention.
Fig. 5 illustrates that the present invention is used for the stream of another embodiment of communication means of extensive antenna
Journey schematic diagram.
Fig. 6 illustrates that the present invention is used for the structural representation of one embodiment in base station of extensive antenna
Figure.
Fig. 7 illustrates that the present invention is used for the structure of another embodiment of base station of extensive antenna and shows
It is intended to.
Fig. 8 illustrates that the present invention is used for the structural representation of the communication system of extensive antenna.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical scheme in the embodiment of the present invention
It is clearly and completely described it is clear that described embodiment is only present invention part reality
Apply example, rather than whole embodiments.Description at least one exemplary embodiment is real below
It is merely illustrative on border, never as any restriction to the present invention and its application or use.
Based on the embodiment in the present invention, those of ordinary skill in the art are not before making creative work
Put the every other embodiment being obtained, broadly fall into the scope of protection of the invention.
The communication for extensive antenna of one embodiment of the invention is described below with reference to Figure 1A
Method.
The flow chart that Figure 1A is used for an embodiment of communication means of extensive antenna for the present invention.
As shown in Figure 1A, the method for this embodiment includes：
Step S101, base station carries out wave beam forming using extensive antenna, forms some wave beams.
Step S102, wave beam after figuration for the base station sends channel state information reference signals
(CSI-RS), channel state information reference signals are multiplexed between different beams.
Carry out wave beam forming using extensive antenna and form some wave beams, the wave beam after figuration
Send channel state information reference signals, and channel state information reference signals are in different beams
Between be multiplexed, thus decrease channel state information reference signals occupancy running time-frequency resource, reduce
The expense of channel state information reference signals.
Describe the orientation according to terminal for the base station with reference to Fig. 2A and channel is sent on corresponding wave beam
The situation of state information reference signals.
Fig. 2A is used for the stream of another embodiment of communication means of extensive antenna for the present invention
Cheng Tu.As shown in Figure 2 A, the method for this embodiment includes：
Step S101, base station carries out wave beam forming using extensive antenna, forms some wave beams.
Step S2021, the upward signal that base station sends to terminal measures, to determine terminal
Orientation.
Step S2022, base station determines that according to the orientation of terminal sending channel condition information reference believes
Number wave beam, and determine wave beam on send channel state information reference signals, channel status
Information reference signal is multiplexed between different beams.
Said method not only can reduce the expense of channel state information reference signals, and according to end
The orientation at end determines corresponding wave beam to send channel state information reference signals, can make terminal
It is more readily detected the channel state information reference signals in wave beam.
With reference to Figure 1B and Fig. 2 B, can be with execution step S100 before step S101, i.e. base
Stand and public reference signal (CRS) can also be sent using broad beam, in order to the terminal of user
Access cell.
In step S2021, base station for example can determine the orientation of terminal using following methods.
First method, base station adopts angle of arrival (Angel of Arrival, abbreviation AOA)
The upward signal that distance measuring method sends to terminal measures, to determine the orientation of terminal.
The detailed process of the method is that anchor point is set up in the place beyond base station, sets in base station side
There are awareness apparatus.The arrival direction of the upward signal that awareness apparatus are sent by perception terminal, meter
Calculate the relative bearing between the receiving node of described base station and anchor node or angle, recycle triangle
Measurement method calculates the orientation of user.
Second method, base station is entered using the upward signal that covariance matrix mode sends to terminal
Row measurement, to determine the orientation of terminal.
The detailed process of the method is that the covariance matrix of the upward signal being sent according to terminal is asked
Obtain characteristic vector, the beam direction that characteristic vector characterizes is defined as the direction of user.
Obviously, in addition to the method for the determination terminal side position of foregoing description, can also adopt as needed
Determine the orientation of terminal with other localization methods, no longer exhaustive here.
Additionally, the orientation of above-mentioned determination terminal can be carried out when terminal accesses cell, for example,
Terminal sends upward signal SRS (uplink signal-channel quality measurement), base station pair when accessing cell
SRS measures, to determine the orientation of terminal.
Obviously, other upward signals can also be chosen as needed, for example DM-RS is (based on end
The demodulated reference signal at end) etc., but it is not limited to examples cited.
In step S2022, base station for example can be with using fixed beam mode or dynamic beam
Mode sends the wave beam of channel state information reference signals to determine.
Fixed beam mode is that base station selects one according to the orientation of terminal from the wave beam after figuration
The individual wave beam sending channel state information reference signals.
Fixed beam mode with reference to shown in Fig. 3, has 4 fixed beams, base station after figuration
According to the orientation of terminal, from fixed beam, select one and the immediate wave beam in terminal orientation,
For example choose the 3rd wave beam complying with top to bottm order, for sending channel condition information reference
Signal.
Dynamic beam mode is that base station generates a new wave beam according to the orientation of terminal, is used for
Send channel state information reference signals.
Dynamic beam mode with reference to shown in Fig. 4, has 4 fixed beams, base station after figuration
According to the orientation of terminal, generate a new wave beam, new wave beam is, for example, to comply with top to bottm order
The 3rd wave beam, for sending channel state information reference signals.
Above two wave beam determines method, and wherein, fixed beam mode implements relatively
Easily, in the case of fixed beam is a fairly large number of, the transmission of channel state information reference signals
Direction can also reach higher accuracy, dynamic beam mode implement relatively complicated,
But the accuracy of the sending direction of channel state information reference signals is very high, and this accuracy
Do not affected by fixed beam quantity.
In the present invention, the wave beam after above-mentioned figuration can be using identical cell ID (as little
Area ID, or PCI), when terminal moves to another wave beam from the region of a wave cover
During the region covering, because the cell ID of two wave beams is identical, therefore do not cut in end
Change process, such that it is able to avoid terminal continually to carry out cell switching, improve Consumer's Experience.
Additionally, different wave beams can also improve the interference problem of minizone using identical cell ID.
Obviously, it will be understood by those skilled in the art that being not concerned with or need not solving above-mentioned little
During area's frequent switching problem, the wave beam after above-mentioned figuration can also be configured to using different cells
Mark.
Suitable wave beam is selected to send channel state information reference signals with reference to Fig. 5 description,
And send a communication process of downlink data.
Fig. 5 is used for the flow process of another embodiment of communication means of extensive antenna for the present invention
Figure.As shown in figure 5, the method for this embodiment includes：
Step S500, base station adopts broad beam to send public reference signal (CRS), in order to
The terminal of user accesses cell.
Step S501, base station carries out wave beam forming using extensive antenna, forms some wave beams,
I.e. fixed beam, is provided with N number of fixed beam.
Step S502, the terminal of user accesses cell, sends upward signal.
Step S503, the upward signal that base station sends to terminal measures, to determine terminal
Orientation.
Step S504, base station determines that according to the orientation of terminal sending channel condition information reference believes
Number wave beam, for example can be to be selected from N number of fixed beam using aforesaid fixed beam mode
One suitable wave beam n is sending channel state information reference signals；Or using aforesaid
Dynamic beam mode generates a new wave beam m to send channel state information reference signals.
Step S505, base station sends channel condition information reference on wave beam n or m determining
Signal.
Additionally, the method for the present embodiment can also include step 506 and step 507.
Step 506, terminal-pair channel state information reference signals measure, and obtain precoding
One of matrix instruction (PMI), channel quality instruction (CQI), order instruction (RI)
Or multiple, and these measurement results are sent to base station.Measurement result can reflect the matter of channel
Amount, so that base station side is adjusted.Because user is just for the letter on a wave beam being re-used
Channel state information reference signal is calculated and is fed back, and therefore reduces the calculating of user's lateral terminal
Amount, and reduce feedback overhead.
Step 507, base station selects suitable modulating-coding side according to the measurement result of terminal feedback
Formula, and send downlink data using wave beam n or m to terminal.
Fig. 6 is the structure chart of an embodiment of base station of the present invention.As shown in fig. 6, the present invention
The base station 60 providing includes wave beam forming unit 601 and reference signal transmitting element 602.Wave beam
Figuration unit 601 is used for carrying out wave beam forming using extensive antenna, forms some wave beams.Reference
Signal transmitting unit 602 is used for sending channel by the wave beam after wave beam forming unit 601 figuration
State information reference signals, channel state information reference signals are multiplexed between different beams.
The concrete structure of reference signal transmitting element 602 is described with reference to Fig. 7.
As shown in fig. 7, on the basis of above-described embodiment, the reference signal transmitting element side of inclusion
Position determining module 6021 and reference signal sending module 6022.Orientation determining module 6021 is used for
The upward signal that terminal is sent measures, to determine the orientation of described terminal；Reference signal
Sending module 6022, determines for the orientation according to described terminal and sends channel condition information reference
The wave beam of signal, and channel state information reference signals are sent on the wave beam determining.
Wherein, reference signal sending module 6022 can include wave beam determination sub-module and letter
Channel state information reference signal sending submodule.Wave beam determination sub-module is used for the side according to terminal
Position selects the wave beam of transmission channel state information reference signals from the wave beam after figuration, or
The orientation that person is used for according to terminal generates one and is used for sending channel state information reference signals
New wave beam.Channel state information reference signals sending submodule is used for sending out on the wave beam determining
Channels state information reference signals.
Reference signal transmitting element 602, is additionally operable to send common reference using broad beam to terminal
Signal (CRS).
Orientation determining module 6021 can be used for using arrival angle ranging mode or using association
Variance matrix mode measures to terminal uplink signal, to determine the orientation of terminal.
Additionally, the base station of the present invention can also include dispensing unit, for providing cell ID to join
Put interface, configuring interface by cell ID is little using identical by the beam configuration after figuration
Area identifies, to avoid terminal continually to carry out cell switching.
The base station of the present invention can also include receiving feedback unit, for obtaining terminal-pair channel shape
State information reference signal measure the pre-coding matrix instruction obtaining, channel quality instruction and/
Or order instruction, to determine the modulation coding mode of data.
Fig. 8 is the structure chart of an embodiment of communication system of the present invention.As shown in figure 8, this
The communication system that invention provides includes base station 60 and terminal 80.Before base station 60 includes but is not limited to
State any one base station in embodiment, terminal 80 is for detecting the channel shape in the wave beam after figuration
State information reference signal.
Additionally, the method according to the invention is also implemented as a kind of computer program, should
Computer program includes computer-readable medium, is stored with the computer-readable medium
For executing the computer program of the above-mentioned functions limiting in the method for the present invention.Art technology
Personnel will also understand is that, in conjunction with the various illustrative logical blocks described by disclosure herein, mould
Block, circuit and algorithm steps may be implemented as electronic hardware, computer software or both groups
Close.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement made etc., all should wrap
It is contained within protection scope of the present invention.
Claims (15)
1. a kind of communication means for extensive antenna, including：
Base station carries out wave beam forming using extensive antenna, forms some wave beams；
Wave beam after figuration for the base station sends channel state information reference signals CSI-RS, described
Channel state information reference signals are multiplexed between different beams.
2. method according to claim 1 is it is characterised in that figuration is passed through in described base station
Wave beam afterwards sends channel state information reference signals and includes：
The upward signal that base station sends to terminal measures, to determine the orientation of described terminal；
Base station determines, according to the orientation of described terminal, the wave beam sending channel state information reference signals,
And channel state information reference signals are sent on the wave beam determining.
3. method according to claim 2 is it is characterised in that described base station is according to described
The orientation of terminal determines that the wave beam sending channel state information reference signals includes：
Base station selects a transmission channel shape according to the orientation of described terminal from the wave beam after figuration
The wave beam of state information reference signal；Or,
Base station generates a new wave beam according to the orientation of described terminal, for sending channel status
Information reference signal.
4. method according to claim 2 is it is characterised in that described base station is sent out to terminal
The upward signal sending measures, and is included with the orientation determining described terminal：
Base station is upper using reach that angle ranging mode or covariance matrix mode send to terminal
Row signal measures, to determine the orientation of described terminal.
5. method according to claim 1 is it is characterised in that also include：
Beam configuration after described figuration is using identical cell ID, to avoid terminal frequency
Carry out cell switching numerously.
6. method according to claim 1 is it is characterised in that also include：Described base station
Public reference signal CRS is sent using broad beam.
7. method according to claim 1 is it is characterised in that also include：
Base station obtains channel state information reference signals described in terminal-pair and measures prelisting of obtaining
Code matrix instruction, channel quality instruction and/or order instruction, to determine the modulating-coding side of data
Formula.
8. a kind of base station for extensive antenna, including：
Wave beam forming unit, for carrying out wave beam forming using extensive antenna, forms some ripples
Bundle；
Reference signal transmitting element, sends channel condition information ginseng for the wave beam after figuration
Examine signal, described channel state information reference signals are multiplexed between different beams.
9. base station according to claim 8 it is characterised in that
Described reference signal transmitting element includes：
Orientation determining module, for measuring to the upward signal that terminal sends, to determine
State the orientation of terminal；
Reference signal sending module, determines for the orientation according to described terminal and sends channel status
The wave beam of information reference signal, and channel state information reference signals are sent on the wave beam determining.
10. base station according to claim 9 it is characterised in that
Described reference signal sending module includes：Wave beam determination sub-module and channel condition information
Reference signal submodule；
Described wave beam determination sub-module, for the wave beam after figuration according to the orientation of described terminal
The middle wave beam selecting transmission channel state information reference signals；Or, for according to described
The orientation of terminal generates one and is used for sending the new wave beam of channel state information reference signals；
Described channel state information reference signals sending submodule, for sending out on the wave beam determining
Channels state information reference signals.
11. base stations according to claim 9 it is characterised in that
Described orientation determining module, for using reaching angle ranging mode or adopt covariance
Matrix-style measures to terminal uplink signal, to determine the orientation of described terminal.
12. base stations according to claim 8 are it is characterised in that also include：
Dispensing unit, for providing cell ID configuration interface, configures interface by cell ID
Beam configuration after figuration is using identical cell ID, to avoid terminal continually to carry out
Cell switches.
13. base stations according to claim 8 are it is characterised in that described reference signal is sent out
Send unit, be additionally operable to send public reference signal CRS using broad beam to described terminal.
14. base stations according to claim 8 are it is characterised in that also include：
Receive feedback unit, measure for obtaining terminal-pair channel state information reference signals
Pre-coding matrix instruction, channel quality instruction and/or the order instruction obtaining, to determine data
Modulation coding mode.
A kind of 15. communication systems for extensive antenna, including arbitrary in claim 8-14
Base station described in and terminal, described terminal is for detecting the channel shape in the wave beam after figuration
State information reference signal.
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| CN201510502305.7A CN106470086A (en) | 2015-08-14 | 2015-08-14 | For the communication means of extensive antenna, base station and communication system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167618A (en) * | 2018-07-05 | 2019-01-08 | 东南大学 | The extensive MIMO down channel of FDD is rebuild and multiuser transmission method |
| WO2020252690A1 (en) * | 2019-06-19 | 2020-12-24 | Qualcomm Incorporated | Analog csf for fdd partial reciprocity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090323847A1 (en) * | 2008-06-30 | 2009-12-31 | Cisco Technology, Inc. | Open-loop beamforming mimo communications in frequency division duplex systems |
| WO2013100565A1 (en) * | 2011-12-27 | 2013-07-04 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting/receiving csi-rs in massive mimo system operating in fdd mode |
| CN103825663A (en) * | 2014-02-21 | 2014-05-28 | 电信科学技术研究院 | Method and device for measuring channel state information |
-
2015
- 2015-08-14 CN CN201510502305.7A patent/CN106470086A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090323847A1 (en) * | 2008-06-30 | 2009-12-31 | Cisco Technology, Inc. | Open-loop beamforming mimo communications in frequency division duplex systems |
| WO2013100565A1 (en) * | 2011-12-27 | 2013-07-04 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting/receiving csi-rs in massive mimo system operating in fdd mode |
| CN103825663A (en) * | 2014-02-21 | 2014-05-28 | 电信科学技术研究院 | Method and device for measuring channel state information |
Non-Patent Citations (2)
| Title |
|---|
| 3RD GENERATION PARTNERSHIP PROJECT: "GenerationTechinal Specification Group Radio Access Network：Study on Elevation Beamforming/Full-Dimension (FD) MIMO for LTE(Release 13)", 《3GPP TECHNICAL REPORT 36.897 V1.0.1》 * |
| 成乔: "智能天线中到达角估计算法的研究", 《中国优秀硕士论文全文数据库-信息科技辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167618A (en) * | 2018-07-05 | 2019-01-08 | 东南大学 | The extensive MIMO down channel of FDD is rebuild and multiuser transmission method |
| CN109167618B (en) * | 2018-07-05 | 2021-03-26 | 东南大学 | FDD large-scale MIMO downlink channel reconstruction and multi-user transmission method |
| WO2020252690A1 (en) * | 2019-06-19 | 2020-12-24 | Qualcomm Incorporated | Analog csf for fdd partial reciprocity |
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Application publication date: 20170301 |