CN103516488A - Channel state information feedback method, terminal and network side device - Google Patents
Channel state information feedback method, terminal and network side device Download PDFInfo
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Abstract
The invention discloses channel state information feedback method, a terminal and a network side device. The method comprises: calculating sub-band pre-coding matrix indication PMI corresponding to each sub-band of all sub-bands; and sending the sub-band PMIs of all sub-bands through at least two uplink subframes. According to the method and product provided in the embodiment of the invention, the terminal side sends the sub-band PMIs of all sub-bands through the at least two uplink subframes to the network side device; correspondingly, when the network side device schedules the sub-bands for the terminal, no matter which sub-band is scheduled, sub-band PMI feedback corresponding to the sub-band can be obtained, further channel state information of the sub-band can be obtained, so that reliability of data transmission and system performance are improved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of channel state information feedback method, terminal and network equipment.
Background technology
MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) system refers to all be equipped with at transmitting terminal and receiving terminal the system of many antennas.Mimo system has increased the processing in spatial domain on the basis of traditional time frequency processing, can further obtain ARRAY PROCESSING gain and diversity gain.In mimo system, if transmitter can be known channel condition information, just can to transmitted signal, be optimized according to channel status, to improve signal receiving quality and to reduce the requirement to Receiver Complexity.
LTE Rel-8(Long Term Evolution Release-8, Long Term Evolution version 8) system has been introduced closed loop precoding technique.The set of all preserving same pre-coding matrix based on closed loop precoding technique ， base station and terminal, is called code book.Terminal estimates after channel status according to cell common pilots, by certain criterion, selects a pre-coding matrix from code book.The criterion of choosing can be to maximize mutual information, maximization output Signal to Interference plus Noise Ratio etc.By the pre-coding matrix of selecting, the index in code book feeds back to base station by up channel to terminal, and this index is called PMI (Pre-Coding Matrix Indicator, pre-coding matrix indication).The pre-coding matrix that should use this terminal just can be determined according to the PMI receiving in base station.The pre-coding matrix of the PMI indication of terminal to report can be regarded as the quantized value of channel condition information.
The pre-coding matrix corresponding to PMI of terminal to report should be tried one's best and channel status matches, to adapt to the channel variation within the scope of transmission bandwidth.Frequency domain for non-frequency-selective channel or channel changes comparatively mild environment, and terminal can only report a PMI that system bandwidth is corresponding.For frequency-selective channel, terminal should report the PMI that a plurality of subbands are corresponding.Wherein, divided some frequency bands within the scope of system bandwidth, every partial-band is called a subband.During downlink data transmission, if being scheduled for a certain subband Shang，Ze base station, terminal should to downlink data, carry out preliminary treatment with the pre-coding matrix of the corresponding PMI indication of this subband.
At present, the implementation of subband PMI feedback is that terminal is selected a part of subband, only reports the PMI corresponding to subband of selection.But the problem that this seed belt PMI feedback exists is: if the subband that base station is terminal scheduling does not have corresponding PMI feedback ，Ze base station cannot obtain the channel condition information on this subband, and then reduced reliability and the systematic function of transfer of data.
Summary of the invention
The object of this invention is to provide a kind of channel state information feedback method, terminal and network equipment, to solve in prior art, only report the PMI that part subband is corresponding, cause the problem that data transmission credibility and systematic function are lower.
The object of the invention is to be achieved through the following technical solutions:
, comprising:
Calculate the subband pre-coding matrix indication PMI that in whole subbands, each subband is corresponding;
By at least two sub-frame of uplink, send whole subband PMI.
A method of obtaining information feedback, comprising:
By at least two sub-frame of uplink, receive whole subband PMI;
Determine the pre-coding matrix of the corresponding subband of each subband PMI indication.
, comprising:
PMI computing module, for calculating the subband PMI that each subband of whole subbands is corresponding;
PMI feedback module, for sending whole subband PMI by least two sub-frame of uplink.
, comprising:
PMI receiver module, for receiving whole subband PMI by least two sub-frame of uplink;
Pre-coding matrix determination module, for determining the pre-coding matrix of the corresponding subband of each subband PMI indication.
The method that the embodiment of the present invention provides and product, end side sends to network equipment by PMI corresponding to whole subbands by least two sub-frame of uplink.Accordingly, which subband no matter network equipment, when being the subband of terminal scheduling, dispatch, and can both obtain the PMI feedback that subband is corresponding, and then can obtain the channel condition information on this subband, improved reliability and the systematic function of transfer of data.
Accompanying drawing explanation
First method flow diagram that Fig. 1 provides for the embodiment of the present invention;
Second method flow diagram that Fig. 2 provides for the embodiment of the present invention;
The 3rd method flow diagram that Fig. 3 provides for the embodiment of the present invention;
The terminal structure schematic diagram that Fig. 4 provides for the embodiment of the present invention;
The network equipment structural representation that Fig. 5 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of end side to carry out channel state information feedback method, and as shown in Figure 1, specific implementation is as follows for its implementation:
Step 100, calculate the subband PMI that in whole subbands, each subband is corresponding;
Step 110, by least two sub-frame of uplink, send whole subband PMI.
Wherein, subband PMI refers to the PMI calculating for a subband.
Owing to cannot carry the subband PMI that whole subbands are corresponding in a sub-frame of uplink.Therefore,, in the method that the embodiment of the present invention provides, terminal sends to network equipment by whole subband PMI by least two sub-frame of uplink.Accordingly, which subband no matter network equipment, when being the subband of terminal scheduling, dispatch, and can both obtain the subband PMI feedback that subband is corresponding, and then can obtain the channel condition information on this subband, improved reliability and the systematic function of transfer of data.
In the method that the embodiment of the present invention provides, suppose system bandwidth to be divided into M subband.Preferably, end side specifically can send the subband PMI that whole M subband is corresponding by P sub-frame of uplink.Wherein each sub-frame of uplink in P-1 sub-frame of uplink is for sending
individual subband PMI, other 1 sub-frame of uplink is for sending
individual subband PMI.That is to say, subband PMI corresponding to whole M subband is carried on comparatively uniformly in P sub-frame of uplink and sent, thereby make the utilization of resources more reasonable.
In the method that the embodiment of the present invention provides, specifically can be at the PUCCH(Physical of at least two sub-frame of uplink Downlink Control Channel, Physical Uplink Control Channel) the whole subband PMI of upper transmission, also can be at the PUSCH(Physical of at least two sub-frame of uplink Uplink Shared Channel, Physical Uplink Shared Channel) above send whole subband PMI.
In the method that the embodiment of the present invention provides, can periodically report subband PMI, also can aperiodicity report subband PMI.If periodically report subband PMI, the specific implementation of above-mentioned steps 110 can be: periodically send whole subband PMI, within each cycle, by least two sub-frame of uplink, send whole subband PMI.
In the method that the embodiment of the present invention provides, supposing the system bandwidth is divided into 16 subbands.According to the ascending order of frequency or descending antithetical phrase band, be numbered, while sending subband PMI corresponding to these 16 subbands on 4 sub-frame of uplink, preferably, specifically can on the 1st sub-frame of uplink, send subband PMI corresponding to subband difference that is numbered 0 ~ 3, on the 2nd sub-frame of uplink, send subband PMI corresponding to subband difference that is numbered 4 ~ 7, on the 3rd sub-frame of uplink, send subband PMI corresponding to subband difference that is numbered 8 ~ 11, on the 4th sub-frame of uplink, send subband PMI corresponding to subband difference that is numbered 12 ~ 15.That is, sequential after subband corresponding to sub-frame of uplink numbering be greater than the subband numbering that the preceding sub-frame of uplink of sequential is corresponding.In a sub-frame of uplink, can to each subband PMI, encode according to number order, also can to each subband PMI, encode not according to number order, the present invention is not construed as limiting.Based on this preferred implementation, in the embodiment of the present invention, whole M subband can also be divided into P subband group.Concrete, M subband evenly can be divided into P subband group according to the ascending order of frequency or descending, and be numbered for each subband group according to the ascending order of frequency or descending: if M is the integral multiple of P, each subband group consists of M/P subband, otherwise, for P-1 subband group, each subband group by
individual subband forms, for remaining 1 subband group, by
individual subband forms.Accordingly, the specific implementation of above-mentioned steps 110 can be: according to the numbering of subband group, by P sub-frame of uplink, sequentially send the subband PMI that subbands all in each subband group is corresponding.Wherein, the corresponding subband group of each sub-frame of uplink.
Specifically can realize according to subband group number order and report subband PMI by the mode of counting.Accordingly, during all subband is corresponding in sending a subband group subband PMI, specific implementation can be: obtain current subband group counting F; Transmission is numbered the subband PMI that subbands all in the subband group of mod (F, N) is corresponding; Subband batch total is counted to F and add 1.
The embodiment of the present invention also provides a kind of network equipment to obtain channel state information feedback method, and as shown in Figure 2, specific implementation is as follows for its implementation:
Owing to cannot carry whole subband PMI in a sub-frame of uplink.Therefore,, in the method that the embodiment of the present invention provides, terminal sends to network equipment by the subband PMI that in whole subbands, each subband is corresponding by least two sub-frame of uplink.The made an appointment corresponding relation of subband PMI of sub-frame of uplink and its carrying of end side and network equipment.Network equipment, according to the agreement with end side, receives whole subband PMI on corresponding sub-frame of uplink.Which subband no matter network equipment, when being the subband of terminal scheduling, dispatch, and can both obtain the subband PMI feedback that subband is corresponding, and then can obtain the channel condition information on this subband, improved reliability and the systematic function of transfer of data.
In the method that the embodiment of the present invention provides, suppose system bandwidth to be divided into M subband.If terminal sends M the subband PMI that subband is corresponding by P sub-frame of uplink.Wherein on each sub-frame of uplink in P-1 sub-frame of uplink, carry
individual subband PMI, carries on other 1 sub-frame of uplink
individual subband PMI.According to the agreement with end side, network equipment can receive M the subband PMI that subband is corresponding by P sub-frame of uplink.Concrete, on each sub-frame of uplink in P-1 sub-frame of uplink, receive
individual subband PMI receives on other 1 sub-frame of uplink
individual subband PMI.
In the method that the embodiment of the present invention provides, network equipment specifically can receive whole subband PMI on the PUCCH of at least two sub-frame of uplink, also can on the PUSCH of at least two sub-frame of uplink, receive whole subband PMI.
In the method that the embodiment of the present invention provides, network equipment can periodically obtain subband PMI, also can aperiodicity obtain subband PMI.If periodically obtain subband PMI, the specific implementation of above-mentioned steps 210 can be: periodically receive the subband PMI that whole subbands are corresponding, within each cycle, by least two sub-frame of uplink, receive the subband PMI that whole subbands are corresponding.
In the method that the embodiment of the present invention provides, supposing the system bandwidth is divided into 16 subbands.According to the ascending order of frequency or descending antithetical phrase band, be numbered, on 4 sub-frame of uplink, send these 16 subbands respectively during corresponding subband PMI, preferably, according to the agreement with end side, network equipment specifically can receive subband PMI corresponding to subband difference that is numbered 0 ~ 3 on the 1st sub-frame of uplink, on the 2nd sub-frame of uplink, receive subband PMI corresponding to subband difference that is numbered 4 ~ 7, on the 3rd sub-frame of uplink, receive subband PMI corresponding to subband difference that is numbered 8 ~ 11, on the 4th sub-frame of uplink, receive subband PMI corresponding to subband difference that is numbered 12 ~ 15.That is, sequential after subband corresponding to sub-frame of uplink numbering be greater than the subband numbering that the preceding sub-frame of uplink of sequential is corresponding.In a sub-frame of uplink, can to the subband PMI of each subband, encode according to number order, also can to the subband PMI of each subband, encode not according to number order, the present invention is not construed as limiting.Based on this preferred implementation, in the embodiment of the present invention, according to the agreement with end side, network equipment can also be divided into whole M subband P subband group.Concrete, M subband evenly can be divided into P subband group according to the ascending order of frequency or descending, and be numbered for each subband group according to the ascending order of frequency or descending: if M is the integral multiple of P, each subband group consists of M/P subband, otherwise, for P-1 subband group, each subband group by
individual subband forms, for remaining 1 subband group, by
individual subband forms.Accordingly, the specific implementation of above-mentioned steps 210 can be: according to the numbering of subband group, by P sub-frame of uplink, sequentially receive the subband PMI that subbands all in each subband group is corresponding.Wherein, the corresponding subband group of each sub-frame of uplink.
Specifically can realize according to subband group number order and obtain subband PMI by the mode of counting.Accordingly, during all subband is corresponding in receiving a subband group subband PMI, specific implementation can be: obtain current subband group counting F; Reception is numbered the subband PMI that subbands all in the subband group of mod (F, P) is corresponding; Subband batch total is counted to F and add 1.
Below in conjunction with accompanying drawing, the method for end side being carried out to information feedback is elaborated.Network equipment obtains the method for information feedback and can process with reference to the operation of end side, in the present invention, will repeat no more.
Supposing the system bandwidth comprises 100 PRB(Physical Resourc Block, Physical Resource Block), the size of each subband is 6 PRB, total in system
individual subband.Further, according to the order of frequency increments, these 17 subbands are divided into several subband group.Stipulate that a subband group comprises 5 subbands, 17 subbands are divided into so
individual subband group, and subband group is according to the serial number of frequency increments.
The subband PMI that each subband is corresponding is 2 bits, and the subband PMI total length that in a subband group, each subband is corresponding is 10 bits, can be carried in the PUCCH of a sub-frame of uplink.
So, the specific implementation that the PUCCH by 4 sub-frame of uplink sends the subband PMI that all 17 subbands are corresponding as shown in Figure 3, specifically comprises following operation:
Wherein, reporting the initial value of time counting number is 1.In a report cycle, divide and report the subband PMI that whole subbands is corresponding for 4 times.Because whole subbands is divided into 4 subband group, so, report subband PMI corresponding to all subbands in a subband group at every turn.Report subband PMI corresponding to all subbands in the subband group that the value F of time counting number represents to report for the F time.
To with base station side, the function of accepting time counting number with report the function of inferior counting number identical.
Subband group to be reported be numbered mod (F, P).
Concrete, the subband PMI that in a subband group, all subbands are corresponding can be assembled into a PMI packet and be carried on PUCCH.Further, in the PMI packet of subband group, can also comprise CQI(Channel Quality Indicator, channel quality indication), as subband CQI, broadband CQI etc.
In above-mentioned processing procedure, calculate the subband PMI that in subband group to be reported, each subband is corresponding.Can also calculate the subband PMI that whole subbands are corresponding, and take subband group as unit, the PUCCH by 4 sub-frame of uplink sends respectively.
The sub-frame of uplink of carrying subband PMI can be continuous sub-frame of uplink, can be also discontinuous sub-frame of uplink.Specifically, according to real system ruuning situation, by terminal and network equipment, arranged.
If report whole subband PMI by discontinuous sub-frame of uplink.In a report cycle, can be identical for the interval sending between the sub-frame of uplink of subband PMI, also can be different.
Interval between two report cycles, according to real system ruuning situation, is arranged by terminal and network equipment.Preferably, the interval of the sub-frame of uplink between two report cycles is greater than in a report cycle, for sending the interval between the sub-frame of uplink of subband PMI.
The embodiment of the present invention also provides a kind of terminal, and as shown in Figure 4, specific implementation structure is as follows for its implementation structure:
PMI computing module 4001, for calculating the subband PMI that each subband of whole subbands is corresponding;
PMI feedback module 4002, for sending whole subband PMI by least two sub-frame of uplink.
Owing to cannot carry whole subband PMI in a sub-frame of uplink.Therefore the terminal that, the embodiment of the present invention provides sends to network equipment by whole subband PMI by least two sub-frame of uplink.Accordingly, which subband no matter network equipment, when being the subband of terminal scheduling, dispatch, and can both obtain the subband PMI feedback that subband is corresponding, and then can obtain the channel condition information on this subband, improved reliability and the systematic function of transfer of data.
The terminal that the embodiment of the present invention provides, PMI feedback module 4002 specifically can be for, by P sub-frame of uplink, sends M the subband PMI that subband is corresponding, and wherein each sub-frame of uplink in P-1 sub-frame of uplink is used for transmission
individual subband PMI, other 1 sub-frame of uplink is for sending
individual subband PMI.
The terminal that the embodiment of the present invention provides, PMI feedback module 4002 specifically can be for, periodically sends whole subband PMI, within each cycle, by least two sub-frame of uplink, sends whole subband PMI.
The terminal that the embodiment of the present invention provides, if all M subband is divided into P subband group, subband group is according to the ascending order of frequency or descending numbering, PMI feedback module 4002 specifically can be for, according to the numbering of subband group, by P sub-frame of uplink, sequentially send the subband PMI that subbands all in each subband group is corresponding, the corresponding subband group of each sub-frame of uplink.
The embodiment of the present invention also provides a kind of network equipment, and as shown in Figure 5, specific implementation structure is as follows for its implementation structure:
PMI receiver module 5001, for receiving whole subband PMI by least two sub-frame of uplink;
Pre-coding matrix determination module 5002, for determining the pre-coding matrix of the corresponding subband of each subband PMI indication.
Owing to cannot carry whole subband PMI in a sub-frame of uplink.Therefore the terminal that, the embodiment of the present invention provides sends to network equipment by whole subband PMI by least two sub-frame of uplink.The made an appointment corresponding relation of subband PMI of sub-frame of uplink and its carrying of end side and network equipment.The network equipment that the embodiment of the present invention provides, according to the agreement with end side, receives whole subband PMI on corresponding sub-frame of uplink.Which subband no matter network equipment, when being the subband of terminal scheduling, dispatch, and can both obtain the subband PMI feedback that subband is corresponding, and then can obtain the channel condition information on this subband, improved reliability and the systematic function of transfer of data.
The network equipment that the embodiment of the present invention provides, PMI receiver module 5001 specifically can be for, by P sub-frame of uplink, receives the subband PMI that whole M subband is corresponding, concrete, on each sub-frame of uplink in P-1 sub-frame of uplink, receives
the subband PMI that individual subband is corresponding receives on other 1 sub-frame of uplink
individual subband PMI.
The network equipment that the embodiment of the present invention provides, PMI receiver module 5001 specifically can be for, periodically receives whole subband PMI, within each cycle, by least two sub-frame of uplink, receives whole subband PMI.
The network equipment that the embodiment of the present invention provides, if all M subband is divided into N subband group, PMI receiver module 5001 specifically can be for, according to the numbering of subband group, by least two sub-frame of uplink, sequentially receives the subband PMI that subbands all in each subband group is corresponding.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (20)
1. a channel state information feedback method, is characterized in that, comprising:
Calculate the subband pre-coding matrix indication PMI that in whole subbands, each subband is corresponding;
By at least two sub-frame of uplink, send whole subband PMI.
2. method according to claim 1, is characterized in that, by least two sub-frame of uplink, sends whole subband PMI, specifically comprises:
By P sub-frame of uplink, send the subband PMI that whole M subband is corresponding, wherein each sub-frame of uplink in P-1 sub-frame of uplink is for sending
individual subband PMI, other 1 sub-frame of uplink is for sending
individual subband PMI.
3. method according to claim 1, is characterized in that, by least two sub-frame of uplink, sends whole subband PMI, specifically comprises:
Physical Uplink Control Channel PUCCH by least two sub-frame of uplink sends whole subband PMI;
Or,
Physical Uplink Shared Channel PUSCH by least two sub-frame of uplink sends whole subband PMI.
4. according to the method described in claim 1 ~ 3 any one, it is characterized in that, by least two sub-frame of uplink, send whole subband PMI, specifically comprise:
Periodically send whole subband PMI, within each cycle, by least two sub-frame of uplink, send whole subband PMI.
5. according to the method described in claim 1 ~ 3 any one, it is characterized in that, if all M subband is divided into P subband group, subband group, according to the ascending order of frequency or descending numbering, sends whole subband PMI by least two sub-frame of uplink, specifically comprises:
According to the numbering of subband group, by P sub-frame of uplink, sequentially send the subband PMI that subbands all in each subband group is corresponding, the corresponding subband group of each sub-frame of uplink.
6. method according to claim 5, it is characterized in that, according to the numbering of subband group, by P sub-frame of uplink, sequentially send in the process of the subband PMI that subbands all in each subband group is corresponding, send the subband PMI that subbands all in a subband group is corresponding and specifically comprise:
Obtain the current time counting number F that reports;
Transmission is numbered the subband PMI that subbands all in the subband group of mod (F, P) is corresponding;
To reporting time counting number F to add 1.
7. a method of obtaining information feedback, is characterized in that, comprising:
By at least two sub-frame of uplink, receive whole subband PMI;
Determine the pre-coding matrix of the corresponding subband of each subband PMI indication.
8. method according to claim 7, is characterized in that, by least two sub-frame of uplink, receives whole subband PMI, specifically comprises:
By P sub-frame of uplink, receive M the subband PMI that subband is corresponding, wherein on each sub-frame of uplink in P-1 sub-frame of uplink, carry
individual subband PMI, carries on other 1 sub-frame of uplink
individual subband PMI.
9. method according to claim 7, is characterized in that, by least two sub-frame of uplink, receives whole subband PMI, specifically comprises:
PUCCH by least two sub-frame of uplink receives whole subband PMI;
Or,
PUSCH by least two sub-frame of uplink receives whole subband PMI.
10. according to the method described in claim 7 ~ 9 any one, it is characterized in that, by least two sub-frame of uplink, receive whole subband PMI, specifically comprise:
Periodically receive whole subband PMI, within each cycle, by least two sub-frame of uplink, receive whole subband PMI.
11. according to the method described in claim 7 ~ 9 any one, it is characterized in that, if all M subband is divided into P subband group, subband group is according to the ascending order of frequency or descending numbering, by at least two sub-frame of uplink, receive whole subband PMI, specifically comprise:
According to the numbering of subband group, by P sub-frame of uplink, sequentially receive the subband PMI that subbands all in each subband group is corresponding, the corresponding subband group of each sub-frame of uplink.
12. methods according to claim 11, it is characterized in that, according to the numbering of subband group, by least two sub-frame of uplink, sequentially receive in the process of the subband PMI that subbands all in each subband group is corresponding, receive the subband PMI that subbands all in a subband group is corresponding and specifically comprise:
Obtain current reception time counting number F;
Reception is numbered the subband PMI that subbands all in the subband group of mod (F, P) is corresponding;
Subband group is received to time counting number F and add 1.
13. 1 kinds of terminals, is characterized in that, comprising:
PMI computing module, for calculating the subband PMI that each subband of whole subbands is corresponding;
PMI feedback module, for sending whole subband PMI by least two sub-frame of uplink.
14. terminals according to claim 13, is characterized in that, described PMI feedback module specifically for, by P sub-frame of uplink, send the subband PMI that whole M subband is corresponding, wherein each sub-frame of uplink in P-1 sub-frame of uplink is for sending
individual subband PMI, other 1 sub-frame of uplink is for sending
individual subband PMI.
15. according to the terminal described in claim 13 or 14, it is characterized in that, described PMI feedback module specifically for, periodically send whole subband PMI, within each cycle, by least two sub-frame of uplink, send whole subband PMI.
16. according to the terminal described in claim 13 or 14, it is characterized in that, if all M subband is divided into P subband group, subband group is according to the ascending order of frequency or descending numbering, described PMI feedback module specifically for, according to the numbering of subband group, by P sub-frame of uplink, sequentially send the subband PMI that subbands all in each subband group is corresponding, the corresponding subband group of each sub-frame of uplink.
17. 1 kinds of network equipments, is characterized in that, comprising:
PMI receiver module, for receiving whole subband PMI by least two sub-frame of uplink;
Pre-coding matrix determination module, for determining the pre-coding matrix of the corresponding subband of each subband PMI indication.
18. network equipments according to claim 17, is characterized in that, described PMI receiver module specifically for, by P sub-frame of uplink, receive the subband PMI that whole M subband is corresponding, wherein on each sub-frame of uplink in P-1 sub-frame of uplink, carry
individual subband PMI, carries on other 1 sub-frame of uplink
individual subband PMI.
19. according to the network equipment described in claim 17 or 18, it is characterized in that, described PMI receiver module specifically for, periodically receive whole subband PMI, within each cycle, by least two sub-frame of uplink, receive whole subband PMI.
20. according to the network equipment described in claim 17 or 18, it is characterized in that, if all M subband is divided into N subband group, subband group is according to the ascending order of frequency or descending numbering, described PMI receiver module specifically for, according to the numbering of subband group, by least two sub-frame of uplink, sequentially receive the subband PMI that subbands all in each subband group is corresponding, the corresponding subband group of each sub-frame of uplink.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019024611A1 (en) * | 2017-08-01 | 2019-02-07 | 中国移动通信有限公司研究院 | Pmi-based processing method and apparatus, related device and storage medium |
| WO2019062560A1 (en) * | 2017-09-30 | 2019-04-04 | 华为技术有限公司 | Method for indicating uplink sub-band precoding matrix, terminal, and base station |
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