CN107294573A - Feedback method, device and the terminal of channel information - Google Patents
Feedback method, device and the terminal of channel information Download PDFInfo
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- CN107294573A CN107294573A CN201610214154.XA CN201610214154A CN107294573A CN 107294573 A CN107294573 A CN 107294573A CN 201610214154 A CN201610214154 A CN 201610214154A CN 107294573 A CN107294573 A CN 107294573A
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- channel information
- moment
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- reporting types
- reporting
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Classifications
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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
-
- 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
- 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
- H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
Abstract
The embodiment of the invention discloses the feedback method of channel information, device and terminal.A kind of feedback method of channel information, based on mimo system, including：When currently being reported first channel information at moment, determine current to report the moment corresponding to report moment type according to moment configuration information is reported；If current report corresponds to the second reporting types constantly, then report the first reporting channel information for feeding back to base station constantly that the partial information in the first channel information is processed as into channel information to be reported according to a upper correspondence first reporting types, and by feedback of channel information to be reported to base station.The embodiment of the present invention is by using above-mentioned technical proposal, the moment is reported in the second reporting types of correspondence, the reporting channel information of base station can be fed back to constantly will need the partial channel state feedback in the larger high-precision channel information of the feedback quantity reported originally to base station, according to reporting for the first reporting types corresponding with upper one so as to reduce feedback quantity.
Description
Technical field
The present embodiments relate to communication technical field, more particularly to the feedback method of channel information, device and
Terminal.
Background technology
Multiple-input and multiple-output (Multiple-Input Multiple-Output, MIMO) technology refers in transmitting terminal and connect
Receiving end uses multiple transmitting antennas and reception antenna respectively, signal is passed through transmitting terminal and multiple days of receiving terminal
Line is transmitted and received, so as to improve communication quality.The technology can make full use of space resources, not increase
Plus in the case of frequency spectrum resource and antenna transmission power, system channel capacity is increased exponentially, have shown that bright
Aobvious advantage.
At present, in order to pursue higher message transmission rate in communication system, the number of antennas of sending and receiving end is more next
It is more, and the good and bad perception situation to channel status of the performance of MIMO technology is very sensitive, to reach compared with
For preferable performance, it is necessary to know point-device channel status, optimal state is exactly analog channel
Feedback, i.e., high-precision channel feedback.
There is a kind of channel information analog feedback method of narrow-band MIMO system in the prior art, it is substantially former
Reason is to be transmitted the incoming symbol of channel information as feedback channel, and channel fading coefficient picture is normal
Data symbol is equally directly transmitted, in the case where number of antennas and number of sub carrier wave are very more, this method tool
There is very big feedback quantity, therefore may be only available for the analog feedback problem in narrow-band MIMO system.
So, need badly a kind of ensure that feedback accuracy and the less channel of feedback quantity in mimo systems
Feedback of the information scheme.
The content of the invention
The purpose of the embodiment of the present invention is to provide the feedback method, device and terminal of channel information, existing to solve
There is the problem of feedback quantity of high-precision feedback of channel information scheme in mimo system is big.
In a first aspect, the embodiments of the invention provide a kind of feedback method of channel information, this method is based on
Mimo system, including：
When currently being reported first channel information at moment, according to reporting the determination of moment configuration information
It is current report the moment it is corresponding report moment type, wherein, it is described to report moment type to report class including first
Type and the second reporting types；
If current report corresponds to second reporting types constantly, according to a upper correspondence described first
Reporting types report the first reporting channel information for feeding back to base station constantly by first channel information
Partial information be processed as channel information to be reported, and by the feedback of channel information to be reported to base station.
Second aspect, the embodiments of the invention provide a kind of feedback device of channel information, the device is based on
Mimo system, including：
Moment determination type module is reported, for when currently being reported first channel information at moment, root
According to report moment configuration information determine it is described it is current report the moment it is corresponding report moment type, wherein, it is described
Moment type is reported to include the first reporting types and the second reporting types；
Feedback of channel information module, for it is described it is current report correspond to second reporting types constantly when,
The first reporting channel for feeding back to base station constantly is reported to believe according to a upper correspondence first reporting types
Partial information in first channel information is processed as channel information to be reported by breath, and will be described to be reported
Feedback of channel information is to base station.
The third aspect, the embodiments of the invention provide a kind of terminal, the terminal is integrated with the embodiment of the present invention
The feedback device of channel information described in two aspects.
Fourth aspect, the embodiments of the invention provide a kind of feedback method of channel information, this method is based on
MIMO multicarrier systems, including：
Over different frequencies using the feedback method of the channel information described in first aspect of the embodiment of the present invention
Carry out the feedback of channel information.
5th aspect, the embodiments of the invention provide a kind of feedback device of channel information, the device is based on
MIMO multicarrier systems, including：
Feedback module, for the channel letter described in application first aspect of the embodiment of the present invention over different frequencies
The feedback method of breath carries out the feedback of channel information.
6th aspect, the embodiments of the invention provide a kind of terminal, the terminal is integrated with the embodiment of the present invention the
The feedback device of channel information described in five aspects.
Reporting during the feedback scheme of the channel information provided in the embodiment of the present invention, feedback of channel information
Moment includes the first reporting types and the second reporting types, is currently reported first channel information at moment
When, according to report moment configuration information determine it is current report the moment it is corresponding report moment type, if correspondence the
Two reporting types, then feed back on the first of base station constantly according to upper reporting for a correspondence first reporting types
Partial information in first channel information is processed as channel information to be reported by report channel information, and will be to be reported
Feedback of channel information is to base station.By using above-mentioned technical proposal, given the correct time in the second reporting types of correspondence
Carve, the reporting channel information of base station can be fed back to constantly according to reporting for the first reporting types corresponding with upper one
By the partial channel state feedback needed originally in the larger high-precision channel information of the feedback quantity reported to
Base station, so as to reduce feedback quantity.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of the feedback method for channel information that the embodiment of the present invention one is provided；
Fig. 2 is a kind of schematic flow sheet of the feedback method for channel information that the embodiment of the present invention two is provided；
Fig. 3 reports distribution constantly to show for a kind of feedback method of channel information of the offer of the embodiment of the present invention three
It is intended to；
Fig. 4 is a kind of schematic flow sheet of the feedback method for channel information that the embodiment of the present invention four is provided；
Fig. 5 is that a kind of channel information that the embodiment of the present invention four is provided quantifies bit wide schematic diagram；
Fig. 6 reports distribution constantly to show for a kind of feedback method of channel information of the offer of the embodiment of the present invention five
It is intended to；
Fig. 7 is a kind of structured flowchart of the feedback device for channel information that the embodiment of the present invention seven is provided.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.Can be with
Understand, specific embodiment described herein is used only for explaining the present invention, rather than to the limit of the present invention
It is fixed.It also should be noted that, for the ease of description, portion related to the present invention is illustrate only in accompanying drawing
Divide rather than entire infrastructure.
It should be mentioned that some exemplary embodiment quilts before exemplary embodiment is discussed in greater detail
It is described as processing or the method described as flow chart.Although each step is described as the processing of order by flow chart,
But many of which step can be implemented concurrently, concomitantly or simultaneously.In addition, each step is suitable
Sequence can be rearranged.The processing can be terminated when its operations are completed, it is also possible to not
Including additional step in the accompanying drawings.It is described processing can correspond to method, function, code, subroutine,
Subprogram etc..
Embodiment one
Fig. 1 is a kind of schematic flow sheet of the feedback method for channel information that the embodiment of the present invention one is provided, should
Method can be performed by the feedback device of channel information, and wherein the device can be realized by software and/or hardware,
Typically can it is integrated in the terminal.As shown in figure 1, this method includes：
Step 101, when currently being reported first channel information at moment, according to report constantly match somebody with somebody confidence
Breath determines described current to report the moment corresponding to report moment type.
Wherein, it is described to report moment type to include the first reporting types and the second reporting types；
Exemplary, terminal described in the present embodiment is user equipment (User Equipment, UE), specifically
It may include the terminals such as mobile phone, tablet personal computer and PC.
Exemplary, it can be the configuration that terminal report the moment by base station, for example, can pass through Radio Resource
Control (Radio Resource Control, RRC) signaling contour level signaling is configured.On base station is completed
Quarter give the correct time with postponing, can be obtained in terminal and report moment configuration information.Moment configuration information is reported to may include often
The individual specific time for reporting the moment and corresponding report moment type, it may include difference reports moment type
The number at moment is reported, the letter such as interval reported between the moment of the adjacent same type of each two is may also include
Breath.
Exemplary, the channel information in the present embodiment may include channel condition information (Channel State
Information, CSI), specifically, may include that (also known as channel transmits matrix or channel gain to channel matrix
Matrix).Terminal can obtain channel information by measuring the reference signal (also known as pilot tone) of base station transmission.
It is current according to reporting moment configuration information to determine when terminal is currently reported first channel information at moment
Report the moment it is corresponding report moment type, and then determine the current feedback of channel information strategy for reporting the moment.
Specifically, the first channel information may include the first channel matrix.
If step 102, current report correspond to the second reporting types constantly, according in a upper correspondence first
Reporting for report type feeds back to the first reporting channel information of base station by the part in the first channel information constantly
Information processing is channel information to be reported, and by feedback of channel information to be reported to base station.
Exemplary, the moment is reported in the first reporting types of correspondence, terminal can be complete by obtained channel information
Portion feeds back to base station, also can from obtained channel information selected section feedback of channel information to base station, this reality
Example is applied to be not especially limited.The present embodiment is paid close attention in reporting the moment specific in second reporting types of correspondence
How feedback channel information.In the present embodiment, the moment can be reported according to a upper correspondence first reporting types
Feed back to base station the first reporting channel information the partial information in the first channel information is processed as it is to be reported
Channel information, and by feedback of channel information to be reported to base station.For example, can be by the first channel information and first
Reporting channel information is compared, and will be letter to be reported with the information processing that the first reporting channel information is differed
Road information.
Reporting during the feedback method for the channel information that the embodiment of the present invention one is provided, feedback of channel information
Moment includes the first reporting types and the second reporting types, is currently reported first channel information at moment
When, according to report moment configuration information determine it is current report the moment it is corresponding report moment type, if correspondence the
Two reporting types, then feed back on the first of base station constantly according to upper reporting for a correspondence first reporting types
Partial information in first channel information is processed as channel information to be reported by report channel information, and is treated described
Reporting channel information feeds back to base station.By using above-mentioned technical proposal, in the upper of the second reporting types of correspondence
Give the correct time quarter, the reporting channel of base station can be fed back to constantly according to reporting for the first reporting types corresponding with upper one
Information will need the partial channel knowledge in the larger high-precision channel information of the feedback quantity reported anti-originally
Feed base station, so as to reduce feedback quantity.
Embodiment two
Fig. 2 is a kind of schematic flow sheet of the feedback method for channel information that the embodiment of the present invention two is provided, this
Embodiment is optimized based on above-described embodiment, in the present embodiment, and channel information includes channel matrix,
First reporting types are complete reporting types, and the second reporting types are difference reporting types.
Specifically, the method for the present embodiment comprises the following steps：
Step 201, when currently being reported first channel information at moment, according to report constantly match somebody with somebody confidence
Breath determines current to report the moment corresponding to report moment type.
Wherein, it is described to report moment type to include complete reporting types and difference reporting types.First letter
Road information includes the first channel matrix.
Exemplary, it is assumed that the configuration port number of base station end is N1, the reception antenna number of terminal is N2,
Then channel matrix is represented byWherein, t represents to report the moment (also to be understood as channel information
The measurement moment), C represents that channel matrix H is complex matrix, includes N in channel matrix H altogether1*N2It is individual
Element, the value of an element can be understood as on a transmission paths (receiving to a piece-root grafting from a transmitting antenna
Between antenna) channel fading coefficient (also known as the weak factor).For example, can remember that the first channel matrix is H
(t1)。
It is exemplary, base station terminal is reported configure constantly when, can only configure and once correspond on complete
Report type reports the moment, and by reporting below be each configured to constantly correspondence difference reporting types on give the correct time
Carve.
Step 202, judge current to report the moment corresponding to report moment type to be complete reporting types or difference
Divide reporting types, if complete reporting types then perform step 203；If difference reporting types then perform step
Rapid 205.
Step 203, the span according to each element included in the first channel matrix and first are default to be quantified
Bit wide determines the first quantization scale.
Exemplary, it can remember that the first default bit wide that quantifies is P, P concrete numerical value can be prenoticed by base station
To terminal.It is exemplary, P concrete numerical value how to choose can be according to required quantified precision depending on, this
Embodiment is not especially limited.P bits (bits) can be used to quantify each element in the present embodiment,
The predetermined number bit in P bits can also be used to quantify each element, quantifying scale specifically can the amount of finger
The difference of each two adjacent values in channel information after change.Assuming that H (t1) in each element value model
Enclose for a to b, several quantification manners given below are illustratively：
For example, being quantified using P bits to each element, a can be mapped to 0, b is mapped to 2
P powers, then corresponding first, which quantifies scale, is
For example, the 1st bit (i.e. above first) in P bits can be used to represent the positive and negative of numerical value,
Remaining P-1 is used to quantify the absolute value of each element, specifically, hypothesis | a | be more than | b |, can be by
0 is mapped to 0, will | a | it is mapped to 2 P-1 powers, then corresponding first, which quantifies scale, is
And for example, can be to H (t1) in the real and imaginary parts of each element quantified respectively, can first distinguish true
Determine the span of real and imaginary parts, then determine which bit in P bits be used to quantifying real part and which
Several bits are used to quantify imaginary part, and determine according to the larger portion of span the first quantization scale.Specifically
Determination mode can refer to above two determination mode.
Step 204, according to the default bit wide that quantifies of the first quantization scale and first first channel matrix is measured
Change, and by the first quantized channel feedback of the information obtained after quantization to base station.
Exemplary, quantify scale and the first default bit wide P that quantifies to the first channel matrix H (t according to first1)
The channel bit number included in the first quantized channel information obtained after progress P bit quantizations is P*N1*N2。
Step 205, the difference determination difference channel matrix according to the first channel matrix and second channel matrix, its
In, second channel matrix is upper one and reports the channel matrix included in the second channel information obtained constantly.
Exemplary, note second channel matrix is H (t2), note difference channel matrix is d H (t1), then may be used
Obtain d H (t1)=H (t1)-H(t2)。
Step 206, according to second it is default quantify bit wide complete reporting types corresponding with upper one report the moment
The corresponding scale that quantifies of the first reporting channel information fed back quantifies to the difference channel matrix, and
It regard the difference quantized channel information obtained after quantization as channel information to be reported.
Wherein, the described second default bit wide that quantifies is less than the described first default quantization bit wide.
Exemplary, it can remember that the second default bit wide that quantifies is Q, Q concrete numerical value can be prenoticed by base station
To terminal.Exemplary, how Q concrete numerical value is chosen and can be determined according to substantial amounts of emulation or test,
The present embodiment is not especially limited.It is preferred that, Q<<P.Can be according to the complete reporting types of a upper correspondence
The corresponding scale that quantifies of the first reporting channel information that the moment fed back is reported to d H (t1) carry out Q bits
Quantify, and Q<P, using the difference quantized channel information obtained after quantization as channel information to be reported, is then treated
The channel bit number included in reporting channel information is Q*N1*N2.It can be seen that, correspondence difference reporting types
Report the feedback quantity Q*N at moment1*N2Less than the feedback quantity for reporting the moment of correspondence difference reporting types
P*N1*N2。
Step 207, by feedback of channel information to be reported to base station.
Exemplary, base station can combine upper one received before right after difference quantized channel information is received
The first reporting channel information for reporting moment terminal to be fed back of complete reporting types is answered, and it is right at upper one
That answers complete reporting types reports the moment with currently reporting other the corresponding difference received between the moment to report class
Type report other difference quantized channel information received constantly obtain correspondence the first channel information it is complete
Channel information.
The first reporting types in the embodiment of the present invention two are complete reporting types, and the second reporting types are difference
Reporting types, and to currently reporting constantly feedback side during respectively complete reporting types and difference reporting types
Formula makes further refinement, after the once feedback of channel information of complete reporting types is completed, difference below
The bit number of the feedback of channel information of reporting types can become considerably less, but now be still able to obtain
Whole channel information.The feedback side of the scheme of the embodiment of the present invention other channel informations equal with quantified precision
Case is compared, and can effectively reduce feedback quantity in the case where ensureing quantified precision.
Embodiment three
The embodiment of the present invention three provides a kind of feedback method of channel information, is reported constantly using above-mentioned each
The feedback method of channel information in embodiment carries out the feedback of channel information.
In the present embodiment, base station is that two classes of terminal configuration report the moment, and the first reporting types are completely to report
Type, the second reporting types are difference reporting types, wherein, given the correct time in two neighboring complete reporting types
Interval is more than interval at the time of reporting between the moment of two neighboring difference reporting types at the time of between quarter, on
Giving the correct time quarter can be acyclic to be periodically alternatively.
For convenience of description, three feedback of channel information processes for reporting the moment are only gived in the present embodiment,
Fig. 3 reports moment distribution schematic diagram for a kind of feedback method of channel information of the offer of the embodiment of the present invention three,
As shown in figure 3, first reports moment t1The complete reporting types of correspondence, second reports moment t2With the 3rd
It is individual to report moment t3Correspondence difference reporting types, t1、t2And t3The moment is reported for adjacent.
In t1Moment, terminal obtains channel matrix for H (t by the pilot tone of measurement now1), according to H (t1)
Interior element span, it is determined that quantify scale, and to H (t1) each element carry out P bits amounts
Base station is fed back to after change, so the channel bit number that final terminal reports base station is P*N1*N2。
In t2Moment, terminal obtains channel matrix for H (t by the pilot tone of measurement now2), calculating difference letter
Road matrix d H (t2)=H (t2)-H(t1), using with t1Moment identical quantifies scale to d H (t2)
Carry out Q (Q<P) quantization of bit and base station is fed back to, t2Moment and t1Channel information corresponding to moment
Change is less, so corresponding channel information has stronger correlation, the channel ratio of final terminal reporting base station
Special number is Q*N1*N2, base station can be according to t2Channel information and t that reception is arrived1What reception was arrived
Channel information obtains t2The complete channel information that moment terminal is measured.
At the t3 moment, terminal obtains channel matrix for H (t by the pilot tone of measurement now3), calculating difference
Channel matrix d H (t3)=H (t3)-H(t2), using with t1(it also is understood as t2) moment identical
Quantify scale to d H (t3) carry out Q (Q<P) quantization of bit and base station is fed back to, t3Moment and t2When
Corresponding channel information change is carved less, so corresponding channel information has stronger correlation, finally eventually
The channel bit number for holding reporting base station is Q*N1*N2, base station can be according to t3Moment, t2Moment and t1When
The channel information that is respectively received is carved to obtain t3The complete channel information that moment terminal is measured.
It is understood that t4Moment and it is follow-up report the moment to correspond to complete reporting types can also
Correspondence difference reporting types, can be determined by the configuration of base station.Base station, can be according to institute when configuration reports the moment
The changing rule (such as rate of change and amplitude of variation etc.) of channel information is complete come determine to be configured in place's environment
Whole reporting types report the number at moment, difference reporting types to report the number and two adjacent phases at moment
Interval etc. at the time of being reported with reporting types between the moment.
The feedback method of channel information provided in an embodiment of the present invention, each difference reporting types report the moment
Feedback quantity it is all fewer, and base station end can be by carving the channel information that receive with working as to giving the correct time in history
Before report reception to channel information integrated and currently reported measured by moment terminal
Complete channel information, in the case where ensureing feedback accuracy, reduces feedback quantity, effectively reduces transmission
Expense, saves Internet resources.
Example IV
Fig. 4 is a kind of schematic flow sheet of the feedback method for channel information that the embodiment of the present invention four is provided, this
Embodiment is optimized based on embodiment one, in the present embodiment, and channel information includes channel matrix,
First reporting types are high-order reporting types, and the second reporting types are low level reporting types.
Specifically, the method for the present embodiment comprises the following steps：
Step 401, when currently being reported first channel information at moment, according to report constantly match somebody with somebody confidence
Breath determines current to report the moment corresponding to report moment type.
Wherein, it is described to report moment type to include high-order reporting types and low level reporting types.First letter
Road information includes the first channel matrix.
Exemplary, it is assumed that the configuration port number of base station end is N1, the reception antenna number of terminal is N2,
Then channel matrix is represented byWherein, t represents to report the moment (also to be understood as channel information
The measurement moment), C represents that channel matrix H is complex matrix, includes N in channel matrix H altogether1*N2It is individual
Element, the value of an element can be understood as on a transmission paths (receiving to a piece-root grafting from a transmitting antenna
Between antenna) channel fading coefficient (also known as the weak factor).For example, can remember that the first channel matrix is H
(t1)。
It is exemplary, base station terminal is reported configure constantly when, can periodically configure a correspondence high position
Reporting types report the moment, and report moment intermediate configurations in two adjacent correspondence high-order reporting types
Multiple correspondence low level reporting types report the moment.
Step 402, judge current to report the moment corresponding to report moment type to be high-order reporting types or low
Position reporting types, if high-order reporting types then perform step 403；If low level reporting types then perform step
Rapid 405.
Step 403, the span according to each element included in the first channel matrix and the 3rd are default to be quantified
Bit wide M determines the second quantization scale.
It is exemplary, M concrete numerical value and M below1And M2Concrete numerical value can be advance by base station
Notify to terminal.It is exemplary, M concrete numerical value how to choose can be according to required quantified precision depending on,
The present embodiment is not especially limited.The specific determination mode of second quantization scale can refer to the embodiment of the present invention two
In first quantify scale specific determination mode, here is omitted.
Step 404, quantify scale according to second and the 3rd default bit wide M that quantifies is carried out to the first channel matrix
Quantify, and by the preceding M in the quantized channel information obtained after quantization1Position quantized channel feedback of the information is to base station.
Exemplary, quantify scale and the 3rd default bit wide M that quantifies to the first channel matrix H according to second
(t1) carry out after M-bit quantization, preceding M1The channel bit number that includes is in the quantized channel information of position
M1*N1*N2.Exemplary, M1Concrete numerical value how to choose can according to it is substantial amounts of emulation or test come
It is determined that, the present embodiment is not especially limited.
Step 405, notify according on report the moment to be fed back the first of the upper one high-order reporting types of correspondence
The corresponding quantization scale of road information and the 3rd default bit wide M that quantifies quantify to the first channel matrix, and
By the rear M in the quantized channel information obtained after quantization2Position quantized channel information as channel information to be reported,
Wherein, M1+M2=M.
Exemplary, Fig. 5 is that a kind of channel information that the embodiment of the present invention four is provided quantifies bit wide schematic diagram.
As shown in figure 5, total bit wide of the channel information after quantifying is M, high-order bit wide is M1, low level bit wide is
M2。
Exemplary, notified according on report the moment to be fed back the first of the high-order reporting types of upper one correspondence
After the corresponding quantization scale of road information and the 3rd default quantization bit wide M quantify to the first channel matrix,
M afterwards2The channel bit number included in the quantized channel information of position is M2*N1*N2。
Step 406, by feedback of channel information to be reported to base station.
Exemplary, because the two neighboring channel information variable quantity reported measured by moment terminal is smaller,
After the quantization of M-bit is carried out, the numerical value of former will not change, and then the numerical value of several can become
Change, thus base station receive every time correspondence low level reporting types report the channel information that moment terminal is sent after,
On report moment terminal to be fed back first that the upper high-order reporting types of a correspondence received before can be combined
Channel information is reported to obtain the complete channel information of the first channel information of correspondence.
It is preferred that, M1More than M2, it is described to report the high-order reporting types of the correspondence included in moment configuration information
Report the number of times at moment to be less than the number of times for reporting the moment of correspondence low level reporting types.The benefit so set
It is, the change of channel information concentrates on several positions below, so settable M1More than M2, and subtract
A few high position reports number of times, and increase low level reports number of times, further reduces feedback quantity.
The first reporting types in the embodiment of the present invention four are high-order reporting types, and the second reporting types are low level
Reporting types, and to currently reporting feedback side when respectively high-order reporting types and low level reporting types constantly
Formula makes further refinement.Feedback quantity corresponding to two kinds of reporting types is less than complete channel information feedback quantity.
Base station can combine the upper correspondence received before high after the corresponding channel information of low level reporting types is obtained
Position reporting types report the first reporting channel information that moment terminal is fed back obtain correspondence the first channel
The complete channel information of information.The scheme of the embodiment of the present invention other channel informations equal with quantified precision
Feedback scheme is compared, and can effectively reduce feedback quantity in the case where ensureing quantified precision.
Embodiment five
The embodiment of the present invention five provides a kind of feedback method of channel information, and moment application implementation is reported each
The feedback method of channel information in example four carries out the feedback of channel information.
In the present embodiment, base station is that two classes of terminal configuration report the moment, and the first reporting types report for a high position
Type, the second reporting types are low level reporting types, wherein, given the correct time in two neighboring high-order reporting types
Interval is more than interval at the time of reporting between the moment of two neighboring low level reporting types at the time of between quarter, on
Giving the correct time quarter can be acyclic to be periodically alternatively.
For convenience of description, three feedback of channel information processes for reporting the moment are only gived in the present embodiment,
Fig. 6 reports moment distribution schematic diagram for a kind of feedback method of channel information of the offer of the embodiment of the present invention five,
As shown in fig. 6, first reports moment t1Correspondence high position reporting types, second reports moment t2With the 3rd
It is individual to report moment t3Correspondence low level reporting types, t1、t2And t3The moment is reported for adjacent.
In t1Moment, terminal obtains channel matrix for H (t by the pilot tone of measurement now1), according to H (t1)
Interior element span, it is determined that quantify scale, and to H (t1) each element carry out M bits amounts
Change, and select preceding M1Position feeds back to base station, so the channel bit number that final terminal reports base station is
M1*N1*N2。
In t2Moment, terminal obtains channel matrix for H (t by the pilot tone of measurement now2), according to t1Moment
Quantization scale to H (t2) each element carry out M bits quantizations, and select after M2Position feeds back to
Base station, so the channel bit number that final terminal reports base station is M2*N1*N2, base station can combine t1
Reception to high-order channel information obtain complete channel information.
At the t3 moment, terminal obtains channel matrix for H (t by the pilot tone of measurement now3), according to t1When
The quantization scale at quarter is to H (t3) each element carry out M bits quantizations, and select after M2Position feedback
To base station, so the channel bit number that final terminal reports base station is M2*N1*N2, base station can be combined
t1Reception to high-order channel information obtain complete channel information.
It is understood that t4Moment and it is follow-up report the moment to correspond to complete reporting types can also
Correspondence difference reporting types, can be determined by the configuration of base station.Base station, can be according to institute when configuration reports the moment
Locate the changing rule (such as rate of change and amplitude of variation) of channel information in environment to determine a configured high position
Reporting types report the number at moment, low level reporting types report the moment number and it is adjacent two it is identical
Interval at the time of reporting types were reported between the moment.
The feedback method of channel information provided in an embodiment of the present invention, each reporting types report the anti-of moment
The more complete feedback quantity of feedback amount is compared and reduced, and base station end can be by receiving to quarter of giving the correct time in history
Channel information and currently report reception to channel information integrated and currently reported the moment
Complete channel information measured by terminal, in the case where ensureing feedback accuracy, reduces feedback quantity, has
What is imitated reduces transport overhead, saves Internet resources.
Embodiment six
The feedback method for a kind of channel information that the embodiment of the present invention six is provided, based on Long Term Evolution (Long
Term Evolution, LTE) mimo system, the first reporting types are corresponding to aperiodicity feedback, second
Reporting types correspond to periodic feedback or aperiodicity is fed back.
Terminal feedback is divided into periodic feedback and aperiodicity feedback in long evolving system.Wherein, periodically
Feedback takes Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH) control
Signal resource, number of resources is considerably less, rather than periodic feedback takes Physical Uplink Shared Channel (Physical
Uplink Shared Channel, PUSCH) resource, number of resources is relatively more.Can by above-described embodiment
Know, the corresponding feedback quantity of the first reporting types is generally higher than the corresponding feedback quantity of the second reporting types, therefore can
To feed back the corresponding channel information of the first reporting types using aperiodicity feedback, using periodic feedback come
Feed back the corresponding channel information of the second reporting types.Certainly, the corresponding channel information of the second reporting types also may be used
To configure inside aperiodicity feedback resources.
Embodiment seven
Fig. 7 is a kind of structured flowchart of the feedback device for channel information that the embodiment of the present invention seven is provided, the dress
Put based on multiple-input and multiple-output mimo system, can be realized by software and/or hardware, can typically be integrated in end
In end, the feedback of channel information is carried out by performing the feedback method of channel information.As shown in fig. 7, should
Device includes：Report moment determination type module 701 and feedback of channel information module 702.
Wherein, moment determination type module 701 is reported, for currently being reported first channel at moment
During information, according to report moment configuration information determine it is described it is current report the moment it is corresponding report moment type,
Wherein, it is described to report moment type to include the first reporting types and the second reporting types；Feedback of channel information mould
Block 702, for it is described it is current report correspond to second reporting types constantly when, according to a upper correspondence
First reporting types report the first reporting channel information for feeding back to base station constantly to believe described first
Partial information in road information is processed as channel information to be reported, and the feedback of channel information to be reported is given
Base station.
The feedback device of channel information provided in an embodiment of the present invention, gives the correct time in the second reporting types of correspondence
Carve, the reporting channel information of base station can be fed back to constantly according to reporting for the first reporting types corresponding with upper one
By the partial channel state feedback needed originally in the larger high-precision channel information of the feedback quantity reported to
Base station, so as to reduce feedback quantity.
On the basis of above-described embodiment, first channel information includes the first channel matrix.
On the basis of above-described embodiment, first reporting types are on complete reporting types, described second
Report type is difference reporting types；The feedback of channel information module is additionally operable to：Report and configure constantly in basis
Information determine it is described it is current report the moment it is corresponding report moment type after, when it is described it is current report it is constantly right
When answering the complete reporting types, according to the span of each element included in first channel matrix and
The first default bit wide that quantifies determines the first quantization scale, and quantifying scale and described first according to described first presets
Quantify bit wide to quantify first channel matrix, and by the first quantized channel information obtained after quantization
Feed back to base station.
On the basis of above-described embodiment, it is described it is current report correspond to second reporting types constantly when,
The first reporting channel information general that the moment is fed back is reported according to a upper correspondence complete reporting types
Partial information in first channel information is processed as channel information to be reported, including：When it is described it is current on
During the quarter correspondence difference reporting types of giving the correct time, according to the difference of first channel matrix and second channel matrix
Difference channel matrix is determined, wherein, the second channel matrix is upper one and reports obtain constantly second to believe
The channel matrix included in road information；Default quantify that bit wide is corresponding with upper one described completely to be reported according to second
Type reports the corresponding scale that quantifies of the first reporting channel information that the moment fed back to the difference channel
Matrix is quantified, and using the difference quantized channel information obtained after quantization as channel information to be reported, its
In, the described second default bit wide that quantifies is less than the described first default quantization bit wide.
On the basis of above-described embodiment, first reporting types are on high-order reporting types, described second
Report type is low level reporting types；The feedback of channel information module is additionally operable to：Report and configure constantly in basis
Information determine it is described it is current report the moment it is corresponding report moment type after, when it is described it is current report it is constantly right
When answering the high-order reporting types, according to the span of each element included in first channel matrix and
The 3rd default bit wide M that quantifies determines the second quantization scale, and scale and the described 3rd is quantified according to described second
The default bit wide M that quantifies quantifies to first channel matrix, and the quantized channel that will be obtained after quantization
Preceding M in information1Position quantized channel feedback of the information is to base station.
On the basis of above-described embodiment, it is described it is current report correspond to second reporting types constantly when,
The first reporting channel information general that the moment is fed back is reported according to a upper correspondence first reporting types
Partial information in first channel information is processed as channel information to be reported, including：When it is described it is current on
During the quarter correspondence low level reporting types of giving the correct time, given the correct time according in a upper correspondence high-order reporting types
Carve the corresponding scale and the described 3rd that quantifies of the first fed back reporting channel information and preset M pairs of bit wide of quantization
First channel matrix is quantified, and by the rear M in the quantized channel information obtained after quantization2Position amount
Change channel information as channel information to be reported, wherein, M1+M2=M.
On the basis of above-described embodiment, M1More than M2, it is described to report pair included in moment configuration information
That answers high-order reporting types reports the number of times at moment to be less than the number of times for reporting the moment of correspondence low level reporting types.
On the basis of above-described embodiment, the device is based on Long Term Evolution mimo system, described first
Type is reported to be fed back corresponding to aperiodicity, second reporting types correspond to periodic feedback or aperiodicity
Feedback.
Embodiment eight
The embodiment of the present invention eight provides a kind of terminal, and the terminal is integrated with the letter described in the above embodiment of the present invention
The feedback device of road information, can be entered by performing the feedback method for the channel information that above-described embodiment is provided
The feedback of row channel information.
Embodiment nine
The embodiment of the present invention nine provides a kind of feedback method of channel information, and this method is based on MIMO overloadings
Wave system is united, and this method includes：The method described in application above-described embodiment carries out channel letter over different frequencies
The feedback of breath.
There is a kind of feedback of channel information scheme suitable for MIMO multicarrier systems in the prior art, its
Principle is that terminal estimation obtains multicarrier frequency domain channel, utilizes inverse discrete Fourier transform (Inverse Discrete
Fourier Transform, IDFT) time domain channel response is obtained, using the openness of time domain channel response,
The higher footpath of some energy of negligible amounts is extracted, quantization feedback then is carried out to these footpaths, should
Scheme requires that sending and receiving end has identical cognitive to the delay character of channel, and assumes that the multipath delay of channel is protected
Hold constant, such case is generally more difficult to be met, therefore its performance can be poor in systems in practice.
In multi-carrier systems, resource is divided into time-frequency bidimensional, all there is correlation in two dimensions.At this
In embodiment, it can be believed on a different frequency using the feedback method of the channel information described in above-described embodiment
The feedback of road information, reaches the purpose for reducing feedback quantity.
Embodiment ten
The embodiment of the present invention ten provides a kind of feedback device of channel information, and the device is based on MIMO overloadings
Wave system is united, including feedback module, for Application Example one over different frequencies into embodiment six it is any
The feedback method of described channel information carries out the feedback of channel information.
Embodiment 11
The embodiment of the present invention 11 provides a kind of terminal, and the terminal is integrated with the letter described in the embodiment of the present invention ten
The feedback device of road information, can be carried out by performing the feedback method for the channel information that embodiment nine is provided
The feedback of channel information.
The executable present invention of the feedback device and terminal of the channel information provided in above-described embodiment is corresponding to be implemented
The feedback method for the channel information that example is provided, possesses the functional module and beneficial effect for performing correlation method.
Not ins and outs of detailed description in the above-described embodiments, reference can be made to the letter that the corresponding embodiment of the present invention is provided
The feedback method of road information.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.Those skilled in the art
It will be appreciated that the invention is not restricted to specific embodiment described here, can enter for a person skilled in the art
Row it is various it is obvious change, readjust and substitute without departing from protection scope of the present invention.Therefore, though
So the present invention is described in further detail by above example, but the present invention be not limited only to
Upper embodiment, without departing from the inventive concept, can also include other more equivalent embodiments,
And the scope of the present invention is determined by scope of the appended claims.
Claims (20)
1. a kind of feedback method of channel information, based on multiple-input and multiple-output mimo system, its feature exists
In, including：
When currently being reported first channel information at moment, according to reporting the determination of moment configuration information
It is current report the moment it is corresponding report moment type, wherein, it is described to report moment type to report class including first
Type and the second reporting types；
If current report corresponds to second reporting types constantly, according to a upper correspondence described first
Reporting types report the first reporting channel information for feeding back to base station constantly by first channel information
Partial information be processed as channel information to be reported, and by the feedback of channel information to be reported to base station.
2. according to the method described in claim 1, it is characterised in that first channel information includes the
One channel matrix.
3. method according to claim 2, it is characterised in that first reporting types are complete
Reporting types, second reporting types are difference reporting types；
According to report moment configuration information determine it is described it is current report the moment it is corresponding report moment type it
Afterwards, in addition to：
If current report corresponds to the complete reporting types constantly, according in first channel matrix
Comprising each element span and the first default bit wide that quantifies determine the first quantization scale；
First channel matrix is entered according to the described first quantization scale and the first default bit wide that quantifies
Row quantifies, and by the first quantized channel feedback of the information obtained after quantization to base station.
4. method according to claim 3, it is characterised in that if current report corresponds to constantly
Second reporting types, then report what the moment was fed back according to a upper correspondence first reporting types
Partial information in first channel information is processed as channel information to be reported by the first reporting channel information,
Including：
If current report corresponds to the difference reporting types constantly, according to first channel matrix and
The difference of second channel matrix determines difference channel matrix, wherein, the second channel matrix is upper one and reported
The channel matrix included in the second channel information that moment obtains；
Moment institute is reported according to the second default quantization bit wide complete reporting types corresponding with upper one instead
The corresponding scale that quantifies of first reporting channel information of feedback quantifies to the difference channel matrix, and will amount
The difference quantized channel information obtained after change as channel information to be reported, wherein, described second default quantifies
Bit wide is less than the described first default quantization bit wide.
5. method according to claim 2, it is characterised in that first reporting types are a high position
Reporting types, second reporting types are low level reporting types；
According to report moment configuration information determine it is described it is current report the moment it is corresponding report moment type it
Afterwards, in addition to：
If current report corresponds to the high-order reporting types constantly, according in first channel matrix
Comprising each element span and the 3rd default bit wide M that quantifies determine the second quantization scale；
Quantify scale and the 3rd default bit wide M that quantifies to first channel matrix according to described second
Quantified, and by the preceding M in the quantized channel information obtained after quantization1Position quantized channel feedback of the information is given
Base station.
6. method according to claim 5, it is characterised in that if current report corresponds to constantly
Second reporting types, then report what the moment was fed back according to a upper correspondence first reporting types
Partial information in first channel information is processed as channel information to be reported by the first reporting channel information,
Including：
If current report corresponds to the low level reporting types constantly, according to the upper correspondence high position
Reporting types report the first reporting channel information that the moment fed back is corresponding quantify scale and the described 3rd
The default bit wide M that quantifies quantifies to first channel matrix, and the quantized channel that will be obtained after quantization
Rear M in information2Position quantized channel information as channel information to be reported, wherein, M1+M2=M.
7. method according to claim 6, it is characterised in that M1More than M2, it is described on give the correct time
The number of times for reporting the moment for carving the high-order reporting types of the correspondence included in configuration information is reported less than correspondence low level
The number of times for reporting the moment of type.
8. according to the method described in claim 1, it is characterised in that based on Long Term Evolution mimo system,
First reporting types are fed back corresponding to aperiodicity, and second reporting types correspond to periodic feedback
Or aperiodicity feedback.
9. a kind of feedback device of channel information, based on multiple-input and multiple-output mimo system, its feature exists
In, including：
Moment determination type module is reported, for when currently being reported first channel information at moment, root
According to report moment configuration information determine it is described it is current report the moment it is corresponding report moment type, wherein, it is described
Moment type is reported to include the first reporting types and the second reporting types；
Feedback of channel information module, for it is described it is current report correspond to second reporting types constantly when,
The first reporting channel for feeding back to base station constantly is reported to believe according to a upper correspondence first reporting types
Partial information in first channel information is processed as channel information to be reported by breath, and will be described to be reported
Feedback of channel information is to base station.
10. device according to claim 9, it is characterised in that first channel information includes the
One channel matrix.
11. device according to claim 10, it is characterised in that first reporting types have been
Whole reporting types, second reporting types are difference reporting types；
The feedback of channel information module is additionally operable to：According to report moment configuration information determine it is described it is current on
Give the correct time quarter it is corresponding report moment type after, when current report corresponds to the complete reporting types constantly
When, it is true according to the span of each element included in first channel matrix and the first default quantization bit wide
Fixed first quantifies scale, and scale and the first default bit wide that quantifies are quantified to described first according to described first
Channel matrix is quantified, and by the first quantized channel feedback of the information obtained after quantization to base station.
12. device according to claim 11, it is characterised in that it is described it is current report it is constantly right
When answering second reporting types, the moment is reported to be fed back according to a upper correspondence complete reporting types
The first reporting channel information the partial information in first channel information be processed as channel to be reported believed
Breath, including：
It is described it is current report correspond to the difference reporting types constantly when, according to first channel matrix and
The difference of second channel matrix determines difference channel matrix, wherein, the second channel matrix is upper one and reported
The channel matrix included in the second channel information that moment obtains；
Moment institute is reported according to the second default quantization bit wide complete reporting types corresponding with upper one instead
The corresponding scale that quantifies of first reporting channel information of feedback quantifies to the difference channel matrix, and will amount
The difference quantized channel information obtained after change as channel information to be reported, wherein, described second default quantifies
Bit wide is less than the described first default quantization bit wide.
13. device according to claim 10, it is characterised in that first reporting types are height
Position reporting types, second reporting types are low level reporting types；
The feedback of channel information module is additionally operable to：According to report moment configuration information determine it is described it is current on
Give the correct time quarter it is corresponding report moment type after, when current report corresponds to the high-order reporting types constantly
When, quantify bit wide M according to the span of each element included in first channel matrix and the 3rd are default
The second quantization scale is determined, scale and the 3rd default bit wide M that quantifies are quantified to institute according to described second
The first channel matrix is stated to be quantified, and by the preceding M in the quantized channel information obtained after quantization1Position quantifies
Feedback of channel information is to base station.
14. device according to claim 13, it is characterised in that it is described it is current report it is constantly right
When answering second reporting types, the moment is reported to be fed back according to a upper correspondence first reporting types
The first reporting channel information the partial information in first channel information be processed as channel to be reported believed
Breath, including：
When it is described it is current report correspond to the low level reporting types constantly when, according to the upper correspondence high position
Reporting types report the first reporting channel information that the moment fed back is corresponding quantify scale and the described 3rd
The default bit wide M that quantifies quantifies to first channel matrix, and the quantized channel that will be obtained after quantization
Rear M in information2Position quantized channel information as channel information to be reported, wherein, M1+M2=M.
15. device according to claim 14, it is characterised in that M1More than M2, it is described to report
The number of times for reporting the moment of the high-order reporting types of correspondence included in moment configuration information is less than on correspondence low level
Report the number of times for reporting the moment of type.
16. device according to claim 9, it is characterised in that based on Long Term Evolution MIMO systems
System, first reporting types are fed back corresponding to aperiodicity, and second reporting types correspond to periodically
Feedback or aperiodicity feedback.
17. a kind of terminal, it is characterised in that the terminal is integrated any just like claim 9-16 described
Channel information feedback device.
18. a kind of feedback method of channel information, based on multiple-input and multiple-output MIMO multicarrier systems,
It is characterised in that it includes：
The feedback method of channel information of the application as described in claim 1-8 is any is carried out over different frequencies
The feedback of channel information.
19. a kind of feedback device of channel information, based on multiple-input and multiple-output MIMO multicarrier systems,
It is characterised in that it includes：
Feedback module, for over different frequencies using the channel information as described in claim 1-8 is any
Feedback method carry out channel information feedback.
20. a kind of terminal, it is characterised in that the integrated channel just like described in claim 19 of the terminal
The feedback device of information.
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