CN106160803A - The methods, devices and systems of descending channel information are obtained based on channel reciprocity - Google Patents

The methods, devices and systems of descending channel information are obtained based on channel reciprocity Download PDF

Info

Publication number
CN106160803A
CN106160803A CN201510143927.5A CN201510143927A CN106160803A CN 106160803 A CN106160803 A CN 106160803A CN 201510143927 A CN201510143927 A CN 201510143927A CN 106160803 A CN106160803 A CN 106160803A
Authority
CN
China
Prior art keywords
channel information
long
descending
base station
term channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201510143927.5A
Other languages
Chinese (zh)
Inventor
周欢
孙鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Xinwei Telecom Technology Inc
Original Assignee
Beijing Xinwei Telecom Technology Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Xinwei Telecom Technology Inc filed Critical Beijing Xinwei Telecom Technology Inc
Priority to CN201510143927.5A priority Critical patent/CN106160803A/en
Publication of CN106160803A publication Critical patent/CN106160803A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention proposes a kind of method based on channel reciprocity acquisition descending channel information and includes: base station obtains the uplink channel information of UE according to the detecting pilot frequency SRS that UE sends, and periodically notify that up long-term channel information, described up long-term channel information are that base station calculates according to the uplink channel information of UE to UE；The downlink reference signal that UE sends according to base station obtains descending channel information, then in conjunction with the up long-term channel information of base station notice, calculates a descending long-term channel correction value and feeds back to base station；Base station utilizes the descending long-term channel correction value that UE feeds back, and is modified obtaining the descending channel information of UE to the up long-term channel information of UE.The impact that channel information is caused by the difference of the transmission condition that the present invention in the case of downstream transmission condition is asymmetric, can well revise up-downgoing.

Description

The methods, devices and systems of descending channel information are obtained based on channel reciprocity
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of based on channel reciprocity acquisition down channel letter The methods, devices and systems of breath.
Background technology
In LTE/LTE-A system, on the one hand, in order to carry out uplink scheduling, need to obtain up channel Relevant information, UE sends detecting pilot frequency SRS (Sounding Reference Signal, detection ginseng to base station Examine signal), base station carries out up channel measurement according to SRS, it is thus achieved that uplink channel information.On the other hand, In order to carry out descending scheduling, base station needs to obtain descending channel information, comprises precoding instruction PMI, channel Quality CQI and order instruction RI.Descending channel information is obtained according to descending pilot frequency measurement, then for this UE By ascending control channel PUCCH or Uplink Shared Channel PUSCH to the above-mentioned information of base station feedback.But It is that the information such as PMI, CQI have carried out certain compression to descending channel information, can not entirely accurate anti- Reflect descending channel information.
In TDD (Time Division Duplex, time division duplex) system, uplink downlink uses same frequency Point, the uplink downlink characteristic of channel is consistent, referred to as channel reciprocity.A kind of down channel that preferably obtains is believed The method of breath is: in the case of antenna ideal calibration, base station end utilizes channel reciprocity, according to up The uplink channel information matrix that SRS measurement obtains, carries out transposition operation and obtains descending channel information matrix, use In descending scheduling.I.e. downlink channel state matrix HdCan be by uplink channel state matrix HuCarry out Transposition obtains,HdDispatch for base station side.So not only save the feedback to down channel Expense, it is thus also avoided that the quantization in feedback procedure and feedback error, with supplementary uplink feedback PMI, CQI etc. The inaccuracy of information, to obtain maximum system capacity.
But in reality, owing to receiving end and the make a start factor of transmitter own or external environment condition are to communication chain The impact on road, can cause the up-downgoing channel difference in TDD system bigger.Especially at many UE MIMO Or under the scene of CoMP, the situation of the interference of UE end and base station side interference is very different, if the most still using Above-mentioned Perfected process, not only can not improve power system capacity, also results in receiving end data and produces bigger error. So needing above-mentioned Perfected process based on channel reciprocity is modified or is improved, channel reciprocity is made to fit For practical situation.
Summary of the invention
The present invention proposes a kind of method obtaining descending channel information based on channel reciprocity, and the method includes:
Base station obtains the uplink channel information of UE according to the detecting pilot frequency SRS that UE sends, and periodically to UE notifies that up long-term channel information, described up long-term channel information are the base station up letters according to UE Road information calculates；
The downlink reference signal that UE sends according to base station obtains descending channel information, notifies then in conjunction with base station Up long-term channel information, calculate a descending long-term channel correction value and feed back to base station；
Base station utilizes the descending long-term channel correction value that UE feeds back, and enters the up long-term channel information of UE Row revises the descending channel information obtaining UE.
Optimal way 1:
Base station is according to uplink channel information matrix and the channel situation of current pairing UE, at downlink precoding code Select a subset as the up long-term channel information of UE in Ben；
UE, according to descending channel information matrix, selects one in the up long-term channel information of base station notice Or the set of multiple code word composition is as long-term channel correction value；
Base station is determined the precoding weights used by pairing UE transmission by uplink channel information matrix, it is judged that this is pre- Whether coding weights are in the set of the long-term channel correction value of UE feedback, if then using this code weight that prelists Value；If not then re-starting UE pairing, until obtaining a long-term channel correction value in UE feedback Set in precoding weights.
The principle of base station selected described subset can be: when using the code word in subset, the entirety of pairing UE Capacity is maximum or disturbs minimum mutually between pairing UE.
UE selects the principle of one or more code words to be: when UE uses the code word selected, capacity is Greatly.
Optimal way 2:
Base station using the average of the uplink channel information matrix of UE as the up long-term channel information of UE；
The average of UE descending channel information matrix deducts the up long-term channel information of base station notice, obtains Difference as descending long-term channel correction value；
The up long-term channel information of base station UE, plus the descending long-term channel correction value of UE feedback, obtains Average to the descending channel information matrix of UE.
Optimal way 3:
Base station using the correlation coefficient of the uplink channel information matrix of UE as the up long-term channel information of UE；
The correlation coefficient of UE descending channel information matrix deducts the up long-term channel information of base station notice, The difference obtained is as descending long-term channel correction value；
The up long-term channel information of base station UE, plus the descending long-term channel correction value of UE feedback, obtains Correlation coefficient to the descending channel information matrix of UE.
Optimal way 4:
The R matrix coefficient that base station obtains after the uplink channel information matrix of UE is carried out QR decomposition as The up long-term channel information of UE；
The R matrix coefficient that UE descending channel information matrix obtains after carrying out QR decomposition deducts base station notice Up long-term channel information, the difference obtained is as descending long-term channel correction value；
The up long-term channel information of base station UE, plus the descending long-term channel correction value of UE feedback, obtains The R matrix coefficient obtained after carrying out QR decomposition to the descending channel information matrix of UE.
Optimal way 5:
The V matrix coefficient that base station obtains after the uplink channel information matrix of UE is carried out SVD decomposition as The up long-term channel information of UE；
The V matrix coefficient that UE descending channel information matrix obtains after carrying out SVD decomposition deducts base station and leads to The up long-term channel information known, the difference obtained is as descending long-term channel correction value；
The up long-term channel information of base station UE, plus the descending long-term channel correction value of UE feedback, obtains The V matrix coefficient obtained after carrying out SVR decomposition to the descending channel information matrix of UE.
In all above method, the descending channel information of multiple UE can be combined by base station, is used for Descending scheduling.
The invention allows for obtaining base station apparatus and the UE device of descending channel information based on channel reciprocity And system.
Base station apparatus includes: uplink channel information computing unit, for the detecting pilot frequency SRS sent according to UE Obtain the uplink channel information of UE；Up long-term channel information computing unit, up for according to UE Channel information calculates up long-term channel information；Up long-term channel information transmitting element, for the cycle Property notifies up long-term channel information to UE；Descending long-term channel correction value receives unit, is used for receiving The descending long-term channel correction value of UE feedback；Amending unit, is used for utilizing descending long-term channel correction value, The up long-term channel information of UE is modified obtaining the descending channel information of UE.
UE device includes: descending channel information computing unit, for the descending reference letter sent according to base station Number obtain descending channel information；Up long-term channel information receives unit, for receiving the up of base station notice Long-term channel information；Descending long-term channel correction value computing unit, for according to descending channel information and up Long-term channel information, calculates a descending long-term channel correction value；Descending long-term channel correction value sends single Unit, for feeding back to base station by descending long-term channel correction value.
System includes base station apparatus as above and UE device.
The present invention is on the basis of existing protocol, mutual by the simple information between base station and UE, to base Stand side obtain uplink channel information be modified obtaining descending channel information.The present invention can be in up-downgoing In the case of transmission conditions are asymmetric, channel is believed by the difference of the transmission condition well revising up-downgoing The impact that breath causes, the descending channel information obtained after correction can apply to the pairing UE in descending scheduling Selection, pairing UE precoding selection etc., it is possible to the effective system improving many UE MIMO and CoMP Performance.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, retouch below Accompanying drawing in stating is some embodiments of the present invention, for those of ordinary skill in the art, is not paying On the premise of creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the information interaction figure between base station and the UE of embodiment 1；
Fig. 2 is the structural representation of the base station apparatus of embodiment 6；
Fig. 3 is the structural representation of the UE device of embodiment 6.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the present invention Accompanying drawing in embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that Described embodiment is a part of embodiment of the present invention rather than whole embodiments；It should be noted that In the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Based on Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise Every other embodiment, broadly fall into the scope of protection of the invention.
Embodiment 1
As it is shown in figure 1, base station periodically notifies up long-term channel information to each UE；Each UE is according to base The downlink reference signal sent of standing obtains descending channel information, then in conjunction with the up long-term channel of base station notice Information, calculates a descending long-term channel correction value and feeds back to base station；Base station utilizes each UE to feed back Descending long-term channel correction value, is modified obtaining under each UE to the up long-term channel information of each UE Row channel information.Below as a example by kth UE, illustrate base station and obtain the descending letter of kth UE The process of road information.
Step 1: base station sends downlink reference signal (can be CRS, it is also possible to for CSI-RS).All UE monitors downlink reference signal, and wherein kth UE is estimated to obtain descending channel information matrix by channel Hk。
Step 2: all UE send SRS, after base station receives the SRS of kth UE, is estimated by channel Meter obtains the uplink channel information matrix H of kth UESRS,k。
Step 3: base station with the up long-term channel information of longer periodic notification kth UE, on The long-term descending channel information of row can be the H that BTS channel is estimated to obtainSRS,kAverage, it may be assumed that
H ‾ SRS , k = E ( H SRS , k )
Step 4: after kth UE receives up long-term channel information, in conjunction with descending channel information matrix Hk, To eNB feeding back downlink long-term channel correction value, descending long-term channel correction value can be the difference of channel coefficients Value, it may be assumed that
ΔH k = H ‾ k - H ‾ SRS , k
Step 5: base station receives the descending long-term channel correction value of kth UE, to kth UE Up long-term channel informationIt is modified, obtains the average of descending channel information matrixIn like manner Descending channel information to other UE.Revise herein and can use following method:
H ^ k = ΔH k + H ‾ SRS , k
Step 6: the descending channel information of all UE is combined by base station, for descending scheduling, as Select pairing UE, determine the pairing downlink precoding of UE, block length, modulation system etc..
Pairing UE as selected is kth UE, and the h UE, then base station end can construct according to the following formula Associating down channel matrix:
H DL = H ^ k H ^ h
Base station carries out descending scheduling according to this associating down channel matrix, determines that kth UE and h are individual The respective downlink precoding of UE, block length, modulation system etc..
Embodiment 2
It is step 3～step 5 with the difference of example 1:
Step 3: base station with the up long-term channel information of longer periodic notification kth UE, on Row long-term channel information is the H that BTS channel is estimated to obtainSRS,kCorrelation coefficient.
R SRS , k = E { H SRS , k H SRS , k H }
Step 4: after kth UE receives up long-term channel information, in conjunction with descending channel information matrix Hk, To eNB feeding back downlink long-term channel correction value, it can be the difference of correlation coefficient.
ΔRk=Rk-RSRS,k, wherein R k = E { H k H k H }
Step 5: base station receives the descending long-term channel correction value of kth UE, in kth UE Row channel information matrix HSRS,kBeing modified of correlation coefficient, obtain revised descending channel information matrix Correlation coefficientIn like manner obtain the descending channel information of other UE.Revise herein and can use following method:
R ^ k = ΔR k + R SRS , k .
Embodiment 3
It is step 3～step 5 with the difference of example 1:
Step 3: base station with the up long-term channel information of longer periodic notification kth UE, on Row long-term channel information is the H that BTS channel is estimated to obtainSRS,kCarry out the R matrix coefficient after QR decomposition.
H SRS , k = Q R SRS , k up
Step 4: after kth UE receives up long-term channel information, in conjunction with descending channel information matrix Hk, To eNB feeding back downlink long-term channel correction value, it can be the difference of the R matrix that QR decomposition obtains.
ΔR k up = R k up - R SRS , k up , Wherein H k = QR k up
Step 5: base station receives the descending long-term channel correction value of kth UE, in kth UE Row channel information matrix HSRS,kCarry out the R matrix coefficient after QR decomposition to be modified, obtain revised The R matrix coefficient that descending channel information matrix obtains after carrying out QR decomposition, in like manner obtains under other UE Row channel information.Revise herein and can use following method:
R ^ k up = ΔR k up + R SRS , k up .
Embodiment 4
It is step 3～step 5 with the difference of example 1:
Step 3: base station with the up long-term channel information of longer periodic notification kth UE, on Row long-term channel information is the H that BTS channel is estimated to obtainSRS,kCarry out the V matrix coefficient after SVD decomposition.
H SRS , k = UΣ V SRS , k T
Step 4: after kth UE receives up long-term channel information, in conjunction with descending channel information matrix Hk, To eNB feeding back downlink long-term channel correction value, it can be the difference of the V matrix that SVD decomposition obtains.
ΔVk=Vk-VSRS,k
Step 5: base station receives the descending long-term channel correction value of kth UE, in kth UE Row channel information matrix HSRS,kCarry out the V matrix coefficient after SVD decomposition to be modified, obtain revised The V matrix coefficient that descending channel information matrix obtains after carrying out SVD decomposition, in like manner obtains other UE's Descending channel information.Revise herein and can use following method:
V ^ k = ΔV k + V SRS , k .
Embodiment 5
It is step 3～step 5 with the difference of example 1:
Step 3: base station with the up long-term channel information of longer periodic notification kth UE, on Row long-term channel information is the H that base station is estimated according to channel to obtainSRS,kChannel situation with current pairing UE The subset selected in downlink precoding code book.The principle selected can be the whole volume of pairing UE Maximum, or pairing UE between disturb minimum mutually.
Step 4: after kth UE receives up long-term channel information, in conjunction with descending channel information matrix Hk, To eNB feeding back downlink long-term channel correction value, can be a code word in current subnet or multiple code word. Selection principle is in current subnet, and which cardinality is kth UE use maximum.
Step 5: base station receives the descending long-term channel correction value of kth UE, it becomes possible to less In the range of be modified determining UE to the up long-term channel information (subset i.e. selected) in step 3 Down channel situation, particularly as follows: base station by uplink channel information matrix determine pairing UE transmission used by Precoding weights, it is judged that these precoding weights whether in the set of the long-term channel correction value of UE feedback, If then using this precoding weights；If not then re-starting UE pairing, until obtaining one at UE Precoding weights in the set of the long-term channel correction value of feedback, in like manner obtain the down channel of other UE Information.
Embodiment 6
The present embodiment is as a example by a system, and this system includes base station apparatus and UE device.Base station apparatus Structure as in figure 2 it is shown, the structure of UE device as shown in Figure 3.
Base station apparatus includes with lower unit:
Uplink channel information computing unit, obtains UE's for the detecting pilot frequency SRS sent according to UE Row channel information；
Up long-term channel information computing unit, for calculating up according to the uplink channel information of UE Long-term channel information；
Up long-term channel information transmitting element, for periodically notifying up long-term channel information to UE；
Descending long-term channel correction value receives unit, for receiving the descending long-term channel correction value of UE feedback；
Amending unit: be used for utilizing descending long-term channel correction value, the up long-term channel information of UE is entered Row revises the descending channel information obtaining UE.
UE device includes with lower unit:
Descending channel information computing unit, obtains down channel for the downlink reference signal sent according to base station Information；
Up long-term channel information receives unit, for receiving the up long-term channel information of base station notice；
Descending long-term channel correction value computing unit, for believing according to descending channel information and up long-term channel Breath, calculates a descending long-term channel correction value；
Descending long-term channel correction value transmitting element, for feeding back to base station by descending long-term channel correction value.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can Completing with the hardware relevant by programmed instruction, aforesaid program can be stored in an embodied on computer readable and deposit In storage media, this program upon execution, performs to include the step of said method embodiment；And aforesaid storage Medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CD.
Last it is noted that above example is only in order to illustrate technical scheme, rather than it is limited System；Although the present invention being described in detail with reference to previous embodiment, those of ordinary skill in the art It is understood that the technical scheme described in foregoing embodiments still can be modified by it, or to it Middle part technical characteristic carries out equivalent；And these amendments or replacement, do not make appropriate technical solution Essence departs from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (12)

1. the method obtaining descending channel information based on channel reciprocity, the method includes:
Base station obtains the uplink channel information of UE according to the detecting pilot frequency SRS that UE sends, and periodically to UE notifies that up long-term channel information, described up long-term channel information are the base station up letters according to UE Road information calculates；
The downlink reference signal that UE sends according to base station obtains descending channel information, notifies then in conjunction with base station Up long-term channel information, calculate a descending long-term channel correction value and feed back to base station；
Base station utilizes the descending long-term channel correction value that UE feeds back, and enters the up long-term channel information of UE Row revises the descending channel information obtaining UE.
Method the most according to claim 1, it is characterised in that:
Base station is according to uplink channel information matrix and the channel situation of current pairing UE, at downlink precoding code Select a subset as the up long-term channel information of UE in Ben；
UE, according to descending channel information matrix, selects one in the up long-term channel information of base station notice Or the set of multiple code word composition is as long-term channel correction value；
Base station is determined the precoding weights used by pairing UE transmission by uplink channel information matrix, it is judged that this is pre- Whether coding weights are in the set of the long-term channel correction value of UE feedback, if then using this code weight that prelists Value；If not then re-starting UE pairing, until obtaining a long-term channel correction value in UE feedback Set in precoding weights.
Method the most according to claim 2, it is characterised in that the principle of base station selected described subset For: mutual interference when using the code word in subset, between whole volume maximum or the pairing UE of pairing UE Minimum.
Method the most according to claim 2, it is characterised in that UE selects one or more codes The principle of word is: when UE uses the code word selected, capacity is maximum.
Method the most according to claim 1, it is characterised in that:
Base station using the average of the uplink channel information matrix of UE as the up long-term channel information of UE；
The average of UE descending channel information matrix deducts the up long-term channel information of base station notice, obtains Difference as descending long-term channel correction value；
The up long-term channel information of base station UE, plus the descending long-term channel correction value of UE feedback, obtains Average to the descending channel information matrix of UE.
Method the most according to claim 1, it is characterised in that:
Base station using the correlation coefficient of the uplink channel information matrix of UE as the up long-term channel information of UE；
The correlation coefficient of UE descending channel information matrix deducts the up long-term channel information of base station notice, The difference obtained is as descending long-term channel correction value；
The up long-term channel information of base station UE, plus the descending long-term channel correction value of UE feedback, obtains Correlation coefficient to the descending channel information matrix of UE.
Method the most according to claim 1, it is characterised in that:
The R matrix coefficient that base station obtains after the uplink channel information matrix of UE is carried out QR decomposition as The up long-term channel information of UE；
The R matrix coefficient that UE descending channel information matrix obtains after carrying out QR decomposition deducts base station notice Up long-term channel information, the difference obtained is as descending long-term channel correction value；
The up long-term channel information of base station UE, plus the descending long-term channel correction value of UE feedback, obtains The R matrix coefficient obtained after carrying out QR decomposition to the descending channel information matrix of UE.
Method the most according to claim 1, it is characterised in that:
The V matrix coefficient that base station obtains after the uplink channel information matrix of UE is carried out SVD decomposition as The up long-term channel information of UE；
The V matrix coefficient that UE descending channel information matrix obtains after carrying out SVD decomposition deducts base station and leads to The up long-term channel information known, the difference obtained is as descending long-term channel correction value；
The up long-term channel information of base station UE, plus the descending long-term channel correction value of UE feedback, obtains The V matrix coefficient obtained after carrying out SVR decomposition to the descending channel information matrix of UE.
Method the most according to claims 1 to 8, it is characterised in that described method also includes:
The descending channel information of multiple UE is combined by base station, for descending scheduling.
10. realizing the base station apparatus of method described in claim 1, described device includes uplink channel information meter Calculate unit, up long-term channel information computing unit, up long-term channel information transmitting element, descending for a long time Channel correction value reception unit and amending unit:
Described uplink channel information computing unit, obtains UE for the detecting pilot frequency SRS sent according to UE Uplink channel information；
Described up long-term channel information computing unit, for calculating according to the uplink channel information of UE Up long-term channel information；
To UE, described up long-term channel information transmitting element, for periodically notifying that up long-term channel is believed Breath；
Described descending long-term channel correction value receives unit, repaiies for receiving the descending long-term channel of UE feedback On the occasion of；
Amending unit: be used for utilizing descending long-term channel correction value, the up long-term channel information of UE is entered Row revises the descending channel information obtaining UE.
The 11. UE devices realizing method described in claim 1, described device includes descending channel information meter Calculate unit, up long-term channel information receives unit, descending long-term channel correction value computing unit and descending length Phase channel correction value transmitting element:
Described descending channel information computing unit, obtains descending for the downlink reference signal sent according to base station Channel information；
Described up long-term channel information receives unit, for receiving the up long-term channel letter of base station notice Breath；
Described descending long-term channel correction value computing unit, for according to descending channel information and up long-term letter Road information, calculates a descending long-term channel correction value；
Described descending long-term channel correction value transmitting element, for feeding back to base by descending long-term channel correction value Stand.
12. systems realizing method described in claim 1, it is characterised in that described system includes: such as power Profit requires the base station apparatus described in 10 and UE device as claimed in claim 11.
CN201510143927.5A 2015-03-30 2015-03-30 The methods, devices and systems of descending channel information are obtained based on channel reciprocity Withdrawn CN106160803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510143927.5A CN106160803A (en) 2015-03-30 2015-03-30 The methods, devices and systems of descending channel information are obtained based on channel reciprocity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510143927.5A CN106160803A (en) 2015-03-30 2015-03-30 The methods, devices and systems of descending channel information are obtained based on channel reciprocity

Publications (1)

Publication Number Publication Date
CN106160803A true CN106160803A (en) 2016-11-23

Family

ID=57340267

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510143927.5A Withdrawn CN106160803A (en) 2015-03-30 2015-03-30 The methods, devices and systems of descending channel information are obtained based on channel reciprocity

Country Status (1)

Country Link
CN (1) CN106160803A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107911153A (en) * 2017-10-31 2018-04-13 东南大学 A kind of down channel method for reconstructing based on uplink CSI towards FDD system
CN107994964A (en) * 2017-11-30 2018-05-04 广州海格通信集团股份有限公司 Cognitive method, system and the LTE base station of channel disturbance
CN112689307A (en) * 2019-10-18 2021-04-20 广州海格通信集团股份有限公司 Uplink access interference avoidance method, device, computer equipment and storage medium
WO2021142605A1 (en) * 2020-01-14 2021-07-22 华为技术有限公司 Method and apparatus for channel measurement

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070191050A1 (en) * 2006-01-19 2007-08-16 Samsung Electronics Co., Ltd. System and method for power control in a wireless communication system
CN101400117A (en) * 2007-09-27 2009-04-01 联想（上海）有限公司 Downlink channel status information determining method and apparatus, pre-coding method and apparatus
US20100265841A1 (en) * 2009-04-21 2010-10-21 Futurewei Technologies, Inc. System and Method for Precoding Codebook Adaptation with Low Feedback Overhead
CN101938302A (en) * 2009-06-29 2011-01-05 大唐移动通信设备有限公司 Beamforming transmission method and device
CN102013904A (en) * 2009-09-27 2011-04-13 大唐移动通信设备有限公司 Uplink data processing method and system
CN102378275A (en) * 2010-08-13 2012-03-14 上海贝尔股份有限公司 Method for obtaining enhanced channel quality indication information and apparatus thereof
US20120176928A1 (en) * 2002-10-25 2012-07-12 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
CN103718635A (en) * 2013-03-14 2014-04-09 华为技术有限公司 Method used for scheduling user device and base station
CN104363062A (en) * 2014-10-29 2015-02-18 清华大学 Relay channel calibration method based on amplification and forwarding in TDD (time division duplex) multiple antenna system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120176928A1 (en) * 2002-10-25 2012-07-12 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US20070191050A1 (en) * 2006-01-19 2007-08-16 Samsung Electronics Co., Ltd. System and method for power control in a wireless communication system
CN101400117A (en) * 2007-09-27 2009-04-01 联想（上海）有限公司 Downlink channel status information determining method and apparatus, pre-coding method and apparatus
US20100265841A1 (en) * 2009-04-21 2010-10-21 Futurewei Technologies, Inc. System and Method for Precoding Codebook Adaptation with Low Feedback Overhead
CN101938302A (en) * 2009-06-29 2011-01-05 大唐移动通信设备有限公司 Beamforming transmission method and device
CN102013904A (en) * 2009-09-27 2011-04-13 大唐移动通信设备有限公司 Uplink data processing method and system
CN102378275A (en) * 2010-08-13 2012-03-14 上海贝尔股份有限公司 Method for obtaining enhanced channel quality indication information and apparatus thereof
CN103718635A (en) * 2013-03-14 2014-04-09 华为技术有限公司 Method used for scheduling user device and base station
CN104363062A (en) * 2014-10-29 2015-02-18 清华大学 Relay channel calibration method based on amplification and forwarding in TDD (time division duplex) multiple antenna system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107911153A (en) * 2017-10-31 2018-04-13 东南大学 A kind of down channel method for reconstructing based on uplink CSI towards FDD system
CN107911153B (en) * 2017-10-31 2021-01-19 东南大学 FDD system-oriented downlink channel reconstruction method based on uplink CSI
CN107994964A (en) * 2017-11-30 2018-05-04 广州海格通信集团股份有限公司 Cognitive method, system and the LTE base station of channel disturbance
CN107994964B (en) * 2017-11-30 2020-09-08 广州海格通信集团股份有限公司 Channel interference sensing method, system, equipment, storage medium and base station
CN112689307A (en) * 2019-10-18 2021-04-20 广州海格通信集团股份有限公司 Uplink access interference avoidance method, device, computer equipment and storage medium
CN112689307B (en) * 2019-10-18 2022-12-06 广州海格通信集团股份有限公司 Uplink access interference avoidance method, device, computer equipment and storage medium
WO2021142605A1 (en) * 2020-01-14 2021-07-22 华为技术有限公司 Method and apparatus for channel measurement

Similar Documents

Publication Publication Date Title
CN102271031B (en) A kind of method and system of feedback of channel information
US10374678B2 (en) Channel state information feedback method and apparatus
US9281927B2 (en) Method and apparatus for reporting channel state information in a wireless communication system
CN102237969B (en) Channel state information transmission method and device
US10574409B2 (en) Information notification method and channel state information process execution method
US20130343216A1 (en) Method and device for reporting channel state
CN103944686B (en) The CSI feedback method and device of multi-user MIMO system
US20150049702A1 (en) Channel state information feedbacks for coordinated multipoint transmissions
JP5923004B2 (en) Reference signal design for distributed antenna systems
CN102237968B (en) Channel state information transmission method and device
EP2076086B1 (en) Multi-user multi-input multi-output system and node b, user equipment, and cqi feedback method
CN102378275A (en) Method for obtaining enhanced channel quality indication information and apparatus thereof
CN107294585B (en) Feedback method and device of channel state information
CN102291228A (en) Channel state information feedback and receiving methods and equipment
CN102932114B (en) Uplink precoding emitting method and device
JP5646768B2 (en) Outer loop link adaptive calculation execution method and apparatus
CN103782522A (en) Method in a wireless communication system
CN102957467A (en) Method and system for processing signals of multiple antennas in downlink system
CN106160803A (en) The methods, devices and systems of descending channel information are obtained based on channel reciprocity
CN113348711A (en) Channel state assessment and reporting scheme in wireless communication
CN107734538B (en) Reference signal configuration and determination method and device, base station and terminal
CN102291229A (en) Channel state information feedback method, receiving method and equipment
KR101758666B1 (en) Method and apparatus for low complexity feedback in multi-user coordinated multi-point communication system
WO2017133549A1 (en) Method and device for reducing complexity of channel quantization
CN106160925A (en) The method and device strengthened for the CQI of multi-user's stacking transmission

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20161123

WW01 Invention patent application withdrawn after publication