CN107666339A - A kind of method and apparatus for sending channel condition information - Google Patents
A kind of method and apparatus for sending channel condition information Download PDFInfo
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- CN107666339A CN107666339A CN201610596570.0A CN201610596570A CN107666339A CN 107666339 A CN107666339 A CN 107666339A CN 201610596570 A CN201610596570 A CN 201610596570A CN 107666339 A CN107666339 A CN 107666339A
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- 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
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
-
- 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
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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
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
Abstract
A kind of method and apparatus for being used for dividing frequency resource in the base station of wireless communication system, a kind of method that channel condition information is sent in the user equipment of cordless communication network, wherein, the user equipment sends the channel condition information to its serving BS, the serving BS includes M antenna, M is more than or equal to 1, and methods described includes：The user equipment receives the training sequence that the serving BS is sent；The user equipment obtains M corresponding with the M antenna according to the training sequence received and ties up channel vector；The user equipment sends the channel vector to the serving BS.
Description
Technical field
The present invention relates to the transmission of wireless communication technology field, more particularly to channel condition information.
Background technology
In current FDD wireless communication fields, (channel state information are referred to as channel condition information
CSI it is) that base station (eNB) carries out important information required during downlink data transmission, current CSI is that feedback method is set by user
Corresponding channel status is obtained after standby (User Equipment abbreviation UE) received training sequence (training sequence),
Then by selecting suitable code word (codeword) to represent the channel status from a predefined code book (codebook),
Feed back to eNB.This method used at present is referred to as to digitize CSI feedback.
The advantages that signaling consumption is small it is clear that digitized CSI feedback has, and feedback power is homogeneous, thus be employed
In LTE/LTE-A systems now.
However, when considering evolution of the LTE/LTE-A systems to 5G systems, it is especially considering that 5G systems are introduced into big rule
Mould multi-antenna array (the even more big number of antennas of 64/128 antenna) is so as to provide the situation of space division gain, for example with multi-purpose
Family-multiple-input, multiple-output (MU-MIMO) technology can obtain huge space division gain.And in large-scale multi-antenna system, above-mentioned number
What the CSI feedback method of word just became is no longer applicable.
First, dramatically increasing with antenna amount, codebook/codeword design become extremely complex；Accordingly
, with codebook increase, how UE therefrom selects the complexity that suitable codeword work also becomes, and expense is also therewith
Improve.Secondly, codebook validity depends on the characteristic of channel, such as channel relevancy, and is introduced at eNB equivalent
In the case that channel has for example carried out beam forming (beamforming), it may be difficult to design suitable codebook.3rd,
Digitized CSI feedback method has its limit of accuracy, when signal to noise ratio (SNR) rises to a certain extent, it may appear that error code is put down
Platform (error floor), restricts the lifting of performance.Finally, due to need to carry out corresponding coding/decoding operation, in up channel
In the case of resource-constrained (such as the Physical Uplink Control Channel Physical Uplink control of existing LTE system
Channel abbreviation PUCCH), the efficiency of coding/decoding operation influences whether the precision of digitized CSI feedback.
Therefore a kind of method of new CSI feedback is needed, goes for the numerous wireless communication system of antenna amount, example
Such as MU-MIMO system.
The content of the invention
To solve above mentioned problem of the prior art, the present invention proposes a kind of method of new CSI feedback, by directly anti-
Channel coefficients are presented without quantization and coded treatment, simulation CSI feedback are realized, so as to the nothing suitable for multi-antenna array
Line communication system.
Specifically, according to the first aspect of the invention, it is proposed that a kind of to be sent in the user equipment of cordless communication network
The method of channel condition information, wherein, the user equipment sends the channel condition information, the service to its serving BS
Base station includes M antenna, and M is more than or equal to 1, and methods described includes：The user equipment receives the instruction that the serving BS is sent
Practice sequence；The user equipment obtains M dimensions channel arrow corresponding with the M antenna according to the training sequence received
Amount；The user equipment sends the channel vector to the serving BS.
Preferably, the acquisition step also includes：Expressed with the combination of the phase of angle of arrival and normalization fading coefficients
The channel vector.
It is highly preferred that the antenna is single-polarized antenna, the acquisition step also includes：With the phase of J angle of arrival and
The channel vector is expressed in the combination of J-1 normalization fading coefficients, wherein, J is less than or equal to M.
It is highly preferred that the single-polarized antenna is bidimensional antenna array, the acquisition step also includes：With J elevation angle
Phase, J azimuthal phases and the J-1 combination for normalizing fading coefficients express the channel vector, wherein, J is small
In equal to M.
It is highly preferred that the dual polarized antenna is bidimensional antenna array, the acquisition step also includes：With J elevation angle
Phase, J azimuthal phases and the 2J-1 combination for normalizing fading coefficients express the channel vector, wherein, J is small
In equal to M.
It is highly preferred that the forwarding step also includes：Only send the decline system for being more than predetermined threshold in the fading coefficients
Number.
It is highly preferred that the acquisition step also includes：With described in the point product representation of the first M n dimensional vector ns and the 2nd M n dimensional vector ns
Channel vector, wherein, the first M n dimensional vector ns represent the part related to power, and the 2nd M n dimensional vector ns represent and phase phase
The part of pass；The forwarding step further comprises：The first M n dimensional vector ns and the 2nd M n dimensional vector ns are sent respectively.
It is highly preferred that the forwarding step further comprises：Phase is carried out to the first M n dimensional vector ns using first function
It is transmitted again after modulation, wherein, the first function is to output of each element in the first M n dimensional vector ns as input
Result is one-to-one.
It is highly preferred that the forwarding step further comprises：When a specific condition is satisfied, the first M dimensions arrow is not sent
Amount.
It is highly preferred that the specified conditions include：The user equipment receives not sending for the serving BS transmission
The instruction of the first M n dimensional vector ns.
It is highly preferred that the specified conditions include：The user equipment determines the power variation in the first M n dimensional vector ns
Less than predetermined threshold.
Preferably, the forwarding step also includes：Resource is carried out to the channel vector to remap to obtain letter to be sent
Road vector so that the length of the channel vector to be sent is equal to the Physical Uplink Control Channel of the cordless communication network
Sub-carrier number；And each element of the channel vector to be sent is corresponded into the Physical Uplink Control Channel respectively
Sent on one subcarrier.
It is highly preferred that the forwarding step also includes：The channel vector to be sent is multiplied by the first orthogonal sequence, made
The each element for obtaining the channel vector to be sent spreads to the diverse location of the Physical Uplink Control Channel time domain, its
In, first orthogonal sequence is orthogonal with the orthogonal sequence difference that the other users equipment of the serving BS uses.
According to the second aspect of the invention, it is proposed that a kind of to send channel status in the user equipment of cordless communication network
The equipment of information, wherein, the user equipment sends the channel condition information to its serving BS, and the serving BS includes
M antenna, M are more than or equal to 1, and the equipment includes：Receiving module, receive the serving BS for the user equipment and send
Training sequence；Module is obtained, is obtained and the M antenna according to the training sequence received for the user equipment
Corresponding M ties up channel vector；Sending module, the channel vector is sent to the serving BS for the user equipment.
In the present invention, by feeding back the channel coefficients of not quantified/coded treatment, simulation CSI feedback is realized, so as to solve
Not the problem of digitlization CSI feedback of having determined is not suitable for multiaerial system；And in the scheme of optimization, it is proposed that the parameter of compression
Change simulation CSI feedback method, further reduce signaling consumption；By the way that the power section of channel coefficients is partially separated with phase
Method so that independent feedback phase information is possibly realized, and for power section, by the way of phase-modulation, solves hair
Penetrate the problem of power variation is excessive so that intending CSI feedback can apply in the case where not changing existing uplink channel structure
To LTE/LTE-A systems；A kind of new PUCCH structures are also proposed simultaneously, can be while ascending resource be saved, same solution
Certainly transmission power changes the problem of excessive.
Brief description of the drawings
The following detailed description to non-limiting example, other spies of the invention are read by referring to accompanying drawing
Sign, purpose and advantage will will become more apparent.
Fig. 1 shows the CSI feedback flow chart according to the present invention；
Fig. 2 shows the PUCCH schematic diagrames according to the present invention；
Fig. 3 shows the CSI feedback equipment block diagram according to the present invention.
Wherein, same or analogous reference represents same or analogous steps characteristic or device/module.
Embodiment
In the specific descriptions of following preferred embodiment, by with reference to the appended accompanying drawing for forming a present invention part.Institute
Attached accompanying drawing, which has been illustrated by way of example, can realize specific embodiment.The embodiment of example is not intended as
Limit is according to all embodiments of the invention.It is appreciated that without departing from the scope of the present invention, other can be utilized
Embodiment, structural or logicality modification can also be carried out.Therefore, following specific descriptions and nonrestrictive, and this
The scope of invention is defined by the claims appended hereto.
Without loss of generality, it is assumed that UE is single antenna, and eNB has M antenna, wherein, M >=1.So UE side joints receive
Training sequence signal r can be expressed as formula (1)：
R=PDLsh+nDL (1)
Wherein, h represents the down channel vector of M × 1, and S represents M × M signal matrix of eNB sides, PDLRepresent down channel
The path profit and loss, nDLRepresent the noise of down channel.The method according to the invention, if using simulation CSI feedback, UE only needs
The CSI of report simulation, i.e. down channel vector be quantified/version of coded treatment, represented with g.G=can be simply considered that
R, or use least square (LS) channel estimation methods such as formula (2)：
Wherein, constant δ is used for the power for normalizing channel vector.In order to which the latitude and up channel of CSI vectors will be simulated
Quantity Matching, it is necessary to above-mentioned channel vector is multiplied with unitary matrix U, so, the signal that final UE is sent is Ug.Then exist
At eNB, the signal Y received can be expressed as following formula：
Y=PULhULgHUH+NUL (3)
Wherein, PUL, hUL NULThe path profit and loss, fast fading channel and the upstream noise of up channel are represented respectively.And eNB
P can be obtained by up trainingULAnd hUL, thus, eNB can recover down channel vector g, such as use lowest mean square
Poor (MMSE) channel estimation methods are calculated by formula (4)：
So far, the simulation CSI that eNB is sent by receiving UE, has obtained down channel vector, so as to complete CSI feedback behaviour
Make.Method of the invention it is achieved the basic procedure that CSI is sent according to above.
Accompanying drawing 1 is shown according to above-mentioned embodiment, and dividing frequency is used in the base station of wireless communication system and is provided
The method in source, comprises the following steps：
S11. the user equipment receives the training sequence that the serving BS is sent；
S12. the user equipment obtains M dimensions letter corresponding with the M antenna according to the training sequence received
Road vector；
S13. the user equipment sends the channel vector to the serving BS.
In above-mentioned simulation CSI feedback method, when M-digit is larger, because each UE is required for feeding back the channel arrow of M dimensions
Amount, it is thus possible to cause larger ascending control channel expense.So according to one embodiment of present invention, can be to above-mentioned mould
Intend CSI feedback method to optimize, to reduce the data volume for needing to send.
First, the situation of (LOS) transmission in sighting distance is considered, channel vector at this moment can be expressed as g=c0aM(θ0), its
In, c0Represent fading coefficients, θ0The angle of arrival (AoA) of LOS path is represented, array response vector can use formula (5) to represent：
am(θ)=[1 ej2πd·cos(θ)/λ … ej2π(m-1)d·cos(θ)/λ]T (5)
Wherein, d represents the distance between adjacent antenna array element, and λ represents wavelength.Due to c0It is unrelated with eNB precoding, therefore
UE only needs to be sent to up to angle information in the case of LOS.So as to reduce the data volume that needs are sent.
Los path will not be only existed in view of the channel status of reality, but has substantial amounts of scattering path while exists.
Therefore single phase information can not reflect actual channel space situation, and at this moment, we can use several phase informations
With combining to improve the precision of feedback for corresponding fading coefficients.
For example, for single-polarized antenna, we can allow UE to send J phase information, such as with
Form.Wherein function f is to meetPre-defined function, i.e. the input and output of function f correspond, so as to
Ensure that phase information can be recovered at eNB.UE also sends corresponding one group of normalization fading coefficients c simultaneously1..., cJ-1,
(for LOS, i.e. J=1, then need not send) wherein, J≤M.In fact, we can cause J to be much smaller than M, i.e., only need to send out
The information of a few predominating path is given, so as to greatly reduce up expense, that is to say, that UE only needs to send J
The phase information of individual angle of arrival and corresponding J-1 normalization fading coefficients.Now, eNB can be recovered by formula (6)
Go out CSI：
Similar, for dual polarized antenna, UE only needs to send J phase informationWith
Corresponding two groups of normalization fading coefficients,WithWherein, J≤M.In fact, we can
To cause J to be much smaller than M, i.e., only need to send the information of a few predominating path, so as to greatly reduce up open
Pin.And eNB can recover CSI according to above- mentioned information,
G=[g(1)T g(2)T]T
Wherein,
The channel vector in two polarised directions is corresponded to respectively.
As preferable, it is contemplated that in some cases, some normalization fading coefficients may very littles even close to zero, from
And can ignore, therefore UE can only send those more significant fading coefficients.That is UE, which can only be sent, is more than predetermined threshold
Those fading coefficients.
In addition, above-described embodiment is directed to homogeneous linear antenna arrays, (uniform Iinear array are referred to as
ULA), but the present disclosure applies equally to 2 dimension aerial arrays, only J above-mentioned angle of arrival phase information need to be changed into J elevation angle
PhaseJ azimuthal phases, accordingly, formula (6), (7), (8) are respectively
It is changed into：
Wherein, N represents the antenna amount in vertical direction,Represent Kronecker product.
Because in simulation CSI feedback method, channel vector is without quantification treatment, it is thus possible to causes UE transmission signal
Very big power saltus step is produced in time domain, below according to an alternative embodiment of the invention, it is proposed that a kind of improved method, can
To solve the problems, such as power saltus step.
Channel vector g is rewritten as to the form of formula (13) first：
Wherein, ⊙ represents dot-product operation, and according to formula (13), channel vector g is expressed as two vectors, previous and work(
Rate is related, and the latter is only related and unrelated with power to phase.In other words, only previous vector can cause power saltus step
And the latter will not.Therefore, phase-modulation can be carried out to previous vector before sending so that the mould phase of each of which element
Together, it is possible to avoid causing power saltus step when sending.Such as previous vector is sent in the form of formula (14)：
Wherein function fmIt is to meet fm(p1..., pM)：Pre-defined function,
That is function fmInput and output correspond, so that it is guaranteed that power information can be recovered at eNB.For example, one is not lost
As property, fMIt can be any one following function：
fm(p1..., pM)=k1pm (15)
fm(p1..., pM)=cos (pm/max{p1..., pM}) (17)
Wherein, k1And k2Represent predefined scalar.That is UE can send phase dependent vector respectively and by phase-modulation
Power dependent vector carrys out feedback analog channel vector.
Further, in order to reduce signaling consumption, it may be considered that need not transmit power dependent vector, only phase every time
Dependent vector is to be required for sending every time, and power dependent vector can determine whether to send according to specified conditions.
Such as can by eNB indicate UE whether transmit power dependent vector；Can also be that power variation model is calculated by UE
When enclosing l and being less than predetermined threshold, not transmit power dependent vector, wherein, power variation scope l computational methods are l=maxm
{pm}/minm{pm}。
The PUCCH or PUSCH that above-described embodiment can continue to use existing LTE system are sent, therefore meet backward compatibility.
But in view of needing transmit power part and phase bit position, therefore compared with the mode for directly transmitting channel vector respectively,
The embodiment is sometimes for the uplink channel resources doubled.Therefore, according to another embodiment of the invention, it is proposed that a kind of
PUCCH new design, can solve the problems, such as power saltus step on the premise of channel vector is directly transmitted.
First, the basic ideas of the present embodiment are will to simulate the different magnitude maps of CSI symbols to the difference of up channel
On subcarrier (subcarriers), rather than in OFDM symbol.Since it is considered that the power of each UE channel vector is can be with
It is normalized, as long as different UE is multiplexed in time domain using orthogonal sequence, it is possible to ensure the work(of the ofdm signal in time domain
Rate balances.
Specifically, referring to accompanying drawing 2, accompanying drawing 2 represents a resource block (resource block for being used to send simulation CSI
Abbreviation RB), wherein dark parts are reserved to reference signal, are not used in and send CSI.Analog channel vector g is carried out first
Resource remapping operation obtains vector T to be sent, and the operation causes T dimension to be equal to subcarriers quantity, preferably
, now the operation of cubic metric (cubic metric abbreviation CM) abatement can also be carried out to g further to reduce power saltus step.
Then T power is normalized operation (so that all UE | | THT | | identical).Normalized CSI to be sent is sweared again
Amount T each element is respectively mapped to be transmitted on RB each subcarriers.
Further, T can be multiplied with an orthogonal sequence, so as to which T each element is spread in time domain, this is just
Sequence is handed over to be expressed as sk=[SK, 1 … SK, 14]T, herein, different UE need from different orthogonal sequences with ensure they
Pairwise orthogonal on each subcarriers, thus, is obtained in n-th of OFDM symbol, carries out the frequency domain letter before IFFT operations
Number it is：
zn=[S1, n … S12, n]T⊙T (18)
Wherein ⊙ represents dot-product operation, as shown in Figure 2.Designed by this PUCCH, can equally solve power saltus step
Problem, and need not be sent twice, save the uplink channel resources of preciousness.
Block diagram is combined again below to introduce the equipment corresponding with the above method provided by the present invention, in view of therein
Unit/device characteristic has corresponding relation with the step feature in the above method, will conform to the principle of simplicity.
Accompanying drawing 3 shows a kind of equipment S30's that channel condition information is sent in the user equipment of cordless communication network
Block diagram, wherein, the user equipment sends the channel condition information to its serving BS, and the serving BS includes M day
Line, M are more than or equal to 1, and equipment S30 includes：
Receiving module 3001, the training sequence of the serving BS transmission is received for the user equipment；
Module 3002 is obtained, is obtained and the M day according to the training sequence received for the user equipment
M corresponding to line ties up channel vector；
Sending module 3003, the channel vector is sent to the serving BS for the user equipment.
Embodiments of the invention are described above, but the invention is not limited in specific system, equipment and
Specific agreement, those skilled in that art can make various deformations or amendments within the scope of the appended claims.
The those skilled in the art of those the art can be by studying specification, disclosure and accompanying drawing and appended
Claims, understand and implement other changes to the embodiment of disclosure.In the claims, word " comprising " is not arranged
Except other elements and step, and wording "one" be not excluded for plural number.In the present invention, " first ", " second " only represent name
Claim, do not represent orbution.In the practical application of invention, cited multiple skills in the possible perform claim requirement of a part
The function of art feature.Any reference in claim should not be construed as the limitation to scope.
Claims (15)
1. a kind of method that channel condition information is sent in the user equipment of cordless communication network, wherein, the user equipment
The channel condition information is sent to its serving BS, the serving BS includes M antenna, and M is more than or equal to 1, methods described
Including：
A. the user equipment receives the training sequence that the serving BS is sent；
B. the user equipment obtains M corresponding with the M antenna according to the training sequence received and ties up channel vector；
C. the user equipment sends the channel vector to the serving BS.
2. according to the method for claim 1, wherein the step b further comprises：
The channel vector is expressed with the combination of the phase of angle of arrival and normalization fading coefficients.
3. according to the method for claim 2, wherein, the antenna is single-polarized antenna, and the step b further comprises：
The channel vector is expressed with the combinations of the phase of J angle of arrival and J-1 normalization fading coefficients, wherein, J is less than
Equal to M.
4. according to the method for claim 2, wherein, the antenna is dual polarized antenna, and the step b further comprises：
The channel vector is expressed with the combinations of the phase of J angle of arrival and 2J-1 normalization fading coefficients, wherein, J is small
In equal to M.
5. according to the method for claim 3, wherein, the single-polarized antenna is bidimensional antenna array, and the step b enters one
Step includes：
The letter is expressed with the phase of J elevation angle, J azimuthal phases and the J-1 combination for normalizing fading coefficients
Road vector, wherein, J is less than or equal to M.
6. according to the method for claim 4, wherein, the dual polarized antenna is bidimensional antenna array, and the step b enters one
Step includes：
The letter is expressed with the phase of J elevation angle, J azimuthal phases and the 2J-1 combination for normalizing fading coefficients
Road vector, wherein, J is less than or equal to M.
7. the method according to claim 4 or 6, the step c further comprises：
Only send the fading coefficients for being more than predetermined threshold in the fading coefficients.
8. according to the method for claim 2, wherein the step b further comprises：
With channel vector described in the point product representation of the first M n dimensional vector ns and the 2nd M n dimensional vector ns, wherein, the first M n dimensional vector ns represent
The part related to power, the 2nd M n dimensional vector ns represent the part related to phase；
The step c further comprises：
The first M n dimensional vector ns and the 2nd M n dimensional vector ns are sent respectively.
9. according to the method for claim 8, wherein the step c further comprises：
It is transmitted again after carrying out phase-modulation to the first M n dimensional vector ns using first function, wherein, the first function pair
Each element in the first M n dimensional vector ns is one-to-one as the output result of input.
10. method according to claim 8 or claim 9, the step c further comprises：
When a specific condition is satisfied, the first M n dimensional vector ns are not sent.
11. according to the method for claim 10, wherein, the specified conditions include：
The user equipment receives the instruction for not sending the first M n dimensional vector ns that the serving BS is sent.
12. according to the method for claim 10, wherein, the specified conditions include：
The user equipment determines that the power variation in the first M n dimensional vector ns is less than predetermined threshold.
13. according to the method for claim 1, wherein the step c further comprises：
Resource is carried out to the channel vector to remap to obtain channel vector to be sent so that the channel vector to be sent
Length be equal to the cordless communication network Physical Uplink Control Channel sub-carrier number；And
The son that each element of the channel vector to be sent is corresponded to the Physical Uplink Control Channel respectively carries
It is transmitted on ripple.
14. according to the method for claim 13, wherein the step c further comprises：
The channel vector to be sent is multiplied by the first orthogonal sequence so that each element of the channel vector to be sent
The diverse location of the Physical Uplink Control Channel time domain is spread to, wherein, first orthogonal sequence and the serving BS
Other users equipment use orthogonal sequence difference it is orthogonal.
15. a kind of equipment that channel condition information is sent in the user equipment of cordless communication network, wherein, the user equipment
The channel condition information is sent to its serving BS, the serving BS includes M antenna, and M is more than or equal to 1, the equipment
Including：
Receiving module, the training sequence of the serving BS transmission is received for the user equipment；
Module is obtained, M corresponding with the M antenna is obtained according to the training sequence received for the user equipment
Tie up channel vector；
Sending module, the channel vector is sent to the serving BS for the user equipment.
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| CN110912600A (en) * | 2019-12-04 | 2020-03-24 | 南方科技大学 | Communication method, device, equipment and storage medium |
| WO2021142631A1 (en) * | 2020-01-14 | 2021-07-22 | Nokia Shanghai Bell Co., Ltd. | Method, device and computer readable medium of communication |
| WO2023206380A1 (en) * | 2022-04-29 | 2023-11-02 | Qualcomm Incorporated | Data collection procedure and model training |
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| CN101867461B (en) * | 2010-04-30 | 2015-06-03 | 中兴通讯股份有限公司 | Channel information acquisition method and device and codebook construction method |
| CN105515730B (en) * | 2014-09-22 | 2018-07-10 | 中兴通讯股份有限公司 | Feedback method, the apparatus and system of channel information |
| US9893777B2 (en) * | 2014-11-17 | 2018-02-13 | Samsung Electronics Co., Ltd. | Method and apparatus for precoding channel state information reference signal |
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|---|---|---|---|---|
| CN110912600A (en) * | 2019-12-04 | 2020-03-24 | 南方科技大学 | Communication method, device, equipment and storage medium |
| CN110912600B (en) * | 2019-12-04 | 2023-07-07 | 南方科技大学 | Communication method, device, equipment and storage medium |
| WO2021142631A1 (en) * | 2020-01-14 | 2021-07-22 | Nokia Shanghai Bell Co., Ltd. | Method, device and computer readable medium of communication |
| WO2023206380A1 (en) * | 2022-04-29 | 2023-11-02 | Qualcomm Incorporated | Data collection procedure and model training |
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