CN102769485B - A kind of baseband processing method and system - Google Patents
A kind of baseband processing method and system Download PDFInfo
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- CN102769485B CN102769485B CN201110115553.8A CN201110115553A CN102769485B CN 102769485 B CN102769485 B CN 102769485B CN 201110115553 A CN201110115553 A CN 201110115553A CN 102769485 B CN102769485 B CN 102769485B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
Abstract
The invention discloses a kind of baseband processing method, including: receiving terminal according to Signal to Interference plus Noise Ratio (SINR) corresponding to two the mapping layer data received, determine CQI (CQI), and feed back to transmitting terminal；Wherein, CQI includes: the designator of the modulation coding mode (MCS) that the mapping layer that M-bit is high for SINR in two mapping layer data that feedback receives uses and N-bit are for feeding back the designator of AGI；Transmitting terminal is according to described CQI, it is thus achieved that the MCS that two mapping layers use, and uses the MCS obtained to need the data sent to be modulated each mapping layer respectively.The present invention discloses a kind of band processing system, use the method and system of the present invention, under conditions of a codeword data is mapped as two layer data, the reduction of the signal energy that receiving terminal receives can be efficiently reduced, and then improve the impact of antenna gain uneven (AGI) the docking collection of letters number.
Description
Technical field
The present invention relates to the multi-antenna technology in radio communication, particularly relate to a kind of baseband processing method and system.
Background technology
In multi-antenna systems, up antenna gain is uneven (AGI, Antenna Gain Imbalance)
Radiant power can be reduced, thus the receiving terminal i.e. performance of base station can be affected, therefore, in multi-antenna systems,
Need to study the AGI impact on performance, and change transmission strategy, in order to improve potential AGI.
AGI Producing reason not only with transmitting terminal such as subscriber equipment (UE, User Equipment) self
Structure and the gain of antenna are relevant, also relevant with external factor such as communication environments.Outside AGI can reflect
The long-term impact on channel of boundary's environment.In order to preferably analyze the AGI impact on channel performance, need grinding
When studying carefully transmission channel, it is carried out special analysis, such as: the research hand-held direction of transmitting terminal is different and causes
The design of the imbalance of propagation loss, antenna self and emission effciency problem of causing etc..
If transmitting terminal can know the size of AGI, it becomes possible to use power distribution algorithm that each antenna is entered
The power distribution that row is suitable, such as uses water-filling algorithm etc., but, it is numerous owing to producing the factor of AGI,
Therefore, it is difficult to determine the exact value of AGI, and, receiving terminal feeds back the size of AGI and carries out power distribution
Deng the complexity that all can be greatly increased system.
By studying the Long Term Evolution (LTE-A, Long Term Evolution-Advanced) of existing enhancing
In system, the layer of Physical Uplink Shared Channel (PUSCH, Physical Uplink Share Channel) maps
With precoding it follows that the signal of each layer is finally mapped on the antenna of correspondence, therefore, AGI is
Whole impact can regard the reduction of the signal energy to a certain layer as, therefore, it can by adopting each layer
With different modulation coding modes (MCS, Modulation and Coding Scheme), reduce AGI
Reduction to signal energy, it may be assumed that improve the AGI impact on receptivity.
To this end, in the case of two code words, third generation partner program (3GPP, Third Generation
Partnership Projects) the physical layer specification of LTE give the reality that each code word uses different MCS
Existing scheme, meanwhile, the physical layer specification of the LTE of 3GPP it further provides for: in the case of a code word, uses
A kind of MCS, now, if a codeword data is mapped as two layer data, owing to two layer data all use one
MCS, so, can cause the reduction of a certain layer signal energy that receiving terminal receives, it may be assumed that can cause AGI
Impact on the signal energy received is bigger.
Summary of the invention
In view of this, present invention is primarily targeted at a kind of baseband processing method of offer and system, at one yard
Under conditions of digital data is mapped as two layer data, the reduction of the signal energy that receiving terminal receives can be efficiently reduced,
And then improve the impact of the AGI docking collection of letters number.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
The invention provides a kind of baseband processing method, the method includes:
Receiving terminal according to Signal to Interference plus Noise Ratio corresponding to two mapping layer data receiving (SINR,
Signal to Interference plus Noise Ratio), determine CQI (CQI, Channel
Quality indicator), and feed back to transmitting terminal；Wherein, described CQI includes: M-bit is used for feeding back receipts
To two mapping layer data in the designator of MCS that uses of high for SINR mapping layer and N-bit use
Designator in feedback AGI；
Transmitting terminal is according to described CQI, it is thus achieved that the MCS that two mapping layers use, and uses the MCS obtained to divide
The other data sending each mapping layer needs are modulated.
In such scheme, described receiving terminal, according to SINR corresponding to two mapping layer data receiving, determines
CQI, for:
Receiving terminal carries out channel estimation according to the pilot frequency information received, and obtains two mapping layer data the most respectively
Corresponding SINR；
According to two SINR, determine the designator for feeding back AGI in CQI；
Afterwards by the finger of the MCS of mapping layer corresponding for the described highest order being used for feeding back in the designator of AGI
Show symbol, insert in described M-bit.
In such scheme, described determine the designator for feeding back AGI in CQI according to two SINR,
For:
Designator corresponding for mapping layer high for SINR in two mapping layer data is inserted highest order；
The absolute value of the difference according to SINR corresponding to two mapping layer data, determines two mapping layer data
The MCS that the mapping layer higher than described SINR for MCS that mapping layer low for middle SINR uses uses reduces
Number of degrees, and designator corresponding for the number of degrees determined is inserted in the remaining bits in described N-bit.
In such scheme, described in feed back to transmitting terminal, for:
Receiving terminal is by controlling channel by described CQI feedback to transmitting terminal.
In such scheme, described transmitting terminal is according to described CQI, it is thus achieved that the MCS that two mapping layers use, for:
Use according to the mapping layer that described M-bit is high for SINR in two mapping layer data that feedback receives
The designator of MCS and described N-bit highest order in the designator feeding back AGI, it is thus achieved that corresponding
Mapping layer use MCS；
Afterwards according to described N-bit for feeding back the designator that the medium progression of designator of AGI is corresponding, obtain
The mapping layer higher than described SINR for MCS that mapping layer low for SINR in two mapping layer data uses uses
The number of degrees that reduces of MCS, the MCS of mapping layer high for SINR is reduced described number of degrees, obtains SINR
The MCS that low mapping layer uses.
Present invention also offers a kind of band processing system, this system includes: receiving terminal and transmitting terminal；Wherein,
Receiving terminal, for the SINR corresponding according to two the mapping layer data received, determines CQI, and feeds back
To transmitting terminal；Wherein, described CQI includes: M-bit is in two mapping layer data that feedback receives
The designator of the MCS that mapping layer high for SINR uses and N-bit are for feeding back the designator of AGI；
Transmitting terminal, after the CQI receiving receiving terminal feedback, transmitting terminal is according to described CQI, it is thus achieved that two
The MCS that mapping layer uses, uses the MCS obtained to need the data sent to carry out each mapping layer respectively
Modulation.
In such scheme, described receiving terminal farther includes: determine module and sending module；Wherein,
Determine module, for the SINR corresponding according to two the mapping layer data received, determine CQI, and will
The CQI determined is sent to sending module；
Sending module, after receiving and determining the CQI that module sends, by CQI feedback to transmitting terminal.
In such scheme, described determine module, specifically for:
Carry out channel estimation according to the pilot frequency information received, obtain two mapping layer data respectively corresponding
SINR, according to two SINR, determines the designator for feeding back AGI in CQI, and is used for described
Feed back the designator of the MCS of mapping layer corresponding to the highest order in the designator of AGI, insert described M ratio
In spy.
In such scheme, according to two SINR, determine in CQI when the designator feeding back AGI,
Described determine module, specifically for:
Designator corresponding for mapping layer high for SINR in two mapping layer data is inserted highest order；And according to
The absolute value of the difference of the SINR that two mapping layer data are corresponding, determines that in two mapping layer data, SINR is low
The number of degrees that reduces of the MCS that uses of higher than described SINR for the MCS mapping layer that uses of mapping layer, and
Designator corresponding for the number of degrees determined is inserted in the remaining bits in described N-bit.
In such scheme, described transmitting terminal farther includes: obtain module and modulation module；Wherein,
Obtain module, for according to described CQI, it is thus achieved that the MCS that two mapping layers use, and two will be obtained
The MCS that individual mapping layer uses is sent to modulation module；
Modulation module, after receiving the MCS obtaining two mapping layers employings that module sends, employing obtains
Each mapping layer is needed the data sent to be modulated by MCS respectively that obtain.
In such scheme, described acquisition module, specifically for:
Use according to the mapping layer that described M-bit is high for SINR in two mapping layer data that feedback receives
The designator of MCS and described N-bit highest order in the designator feeding back AGI, it is thus achieved that corresponding
The MCS that uses of mapping layer, corresponding for the medium progression of designator feeding back AGI according to described N-bit
Designator, obtain MCS that mapping layer low for SINR in two mapping layer data uses than described SINR
The number of degrees that the MCS that high mapping layer uses reduces, reduces described by the MCS of mapping layer high for SINR
Number of degrees, obtains the MCS that mapping layer low for SINR uses.
The baseband processing method of present invention offer and system, receiving terminal is according to two the mapping layer data pair received
The SINR answered, determines CQI, and feeds back to transmitting terminal；Wherein, described CQI includes: M-bit is used for
The designator of the MCS that mapping layer high for SINR in two mapping layer data that feedback receives uses and N
Bit is for feeding back the designator of AGI；Transmitting terminal is according to described CQI, it is thus achieved that two mapping layer employings
MCS, uses the MCS obtained to need the data sent to be modulated each mapping layer respectively, so,
Under conditions of a codeword data is mapped as two layer data, transmitting terminal, can be effective by using different MCS
Ground reduces the reduction of the signal energy that receiving terminal receives, and then improves the impact of the AGI docking collection of letters number.
Accompanying drawing explanation
Fig. 1 is baseband processing method schematic flow sheet of the present invention；
Fig. 2 is band processing system structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further described in more detail.
The baseband processing method of the present invention, as it is shown in figure 1, comprise the following steps:
Step 101: receiving terminal, according to SINR corresponding to two mapping layer data receiving, determines CQI, and
Feed back to transmitting terminal；Wherein, described CQI includes: two mapping layer data that M-bit receives for feedback
The designator of the MCS that mapping layer high for middle SINR uses and N-bit are for feeding back the designator of AGI；
Here, described receiving terminal is base station；Described transmitting terminal is UE.
Described receiving terminal, according to SINR corresponding to two mapping layer data receiving, determines CQI, particularly as follows:
Receiving terminal carries out channel estimation according to the pilot frequency information received, and obtains two mapping layer data the most respectively
Corresponding SINR；
According to two SINR, determine the designator for feeding back AGI in CQI；
Afterwards by the finger of the MCS of mapping layer corresponding for the described highest order being used for feeding back in the designator of AGI
Show symbol, insert in described M-bit.
Wherein, the value of M is identical with the bit of the highest ranking number of MCS, for giving an example, existing
The top step number of some MCS is 29, then the value of M is 5 bits；Designator in M can use existing
The designator of CQI in technology；When arranging N, need to consider the complexity of system and the bit error rate, lift
For individual example, the top step number of existing MCS is 29, then the value of M is 5 bits, is comprehensively examining
After the complexity of worry system and the bit error rate, the value of N can be 3 bits.
Receiving terminal carries out channel estimation according to the pilot frequency information received, and obtains two mapping layer data the most respectively
The concrete processing procedure of corresponding SINR can use prior art；
Described determine the designator for feeding back AGI in CQI according to two SINR, particularly as follows:
Designator corresponding for mapping layer high for SINR in two mapping layer data is inserted highest order；
The absolute value of the difference according to SINR corresponding to two mapping layer data, determines two mapping layer data
The MCS that the mapping layer higher than described SINR for MCS that mapping layer low for middle SINR uses uses reduces
Number of degrees, and designator corresponding for the number of degrees determined is inserted in the remaining bits in described N-bit.
Wherein, when reality is applied, arranging first designator corresponding to mapping layer is 1, second mapping
The designator that layer is corresponding is 0；If the SINR height that first mapping layer data is corresponding, then will be used for feeding back
Extreme higher position in the designator of AGI is 1, if the SINR height that second mapping layer data is corresponding, then will
Extreme higher position in the designator feeding back AGI is 0；At the SINR corresponding according to two mapping layer data
The absolute value of difference, determine that the MCS ratio that mapping layer low for SINR in two mapping layer data uses is described
During the number of degrees that the MCS that mapping layer high for SINR uses reduces, can be determined according to the value of N,
For giving an example, it is assumed that the value of N is 3, due to latter two can be expressed as 00,01,10,
And 11, therefore, it can the top step number 29 of existing MCS is divided into 4 grades, therefore, it can
Arrange latter two as follows: if the absolute value of the difference of SINR corresponding to two mapping layer data
Less than 8dB, then arranging latter two is 00, and the mapping layer representing low for SINR in two mapping layer data uses
The number of degrees that reduces of the MCS that uses of higher than described SINR for MCS mapping layer be 0, it may be assumed that two reflect
Penetrate the MCS that layer uses identical, if the absolute value of the difference of SINR corresponding to two mapping layer data is more than
Equal to 8dB and less than 16dB, then arranging latter two is 01, represents that in two mapping layer data, SINR is low
The number of degrees that reduces of the MCS that uses of higher than described SINR for the MCS mapping layer that uses of mapping layer be 8,
If the absolute value of the difference of the SINR that two mapping layer data are corresponding is more than or equal to 16dB and less than 24dB,
Arranging latter two is 10, and the MCS that the mapping layer representing low for SINR in two mapping layer data uses compares institute
The number of degrees stating the MCS reduction that mapping layer high for SINR uses is 16, if two mapping layer data pair
The absolute value of the difference of the SINR answered is more than or equal to 24dB, then arranging latter two is 11, represents two mappings
The MCS that the mapping layer higher than described SINR for MCS that mapping layer low for SINR in layer data uses uses
The number of degrees reduced is 24.
Here, when the difference of the SINR that two mapping layer data are corresponding is equal to zero, existing CQI is used.
The mapping higher than described SINR for MCS that mapping layer low for SINR in determining two mapping layer data uses
Layer use MCS reduce number of degrees time, if mapping layer low for SINR in two mapping layer data this
Send the MCS that MCS is top step number of data acquisition, now, this transmission number of mapping layer high for SINR
It is set to the MCS of top step number according to the MCS mono-used, in this case, determines two mapping layer data
The MCS that the mapping layer higher than described SINR for MCS that mapping layer low for middle SINR uses uses reduces
Number of degrees is zero, to meet the regulation of existing protocol.Wherein, transmitting terminal can use prior art to obtain two
The MCS of this transmission data acquisition of mapping layer low for SINR in mapping layer data.
Receiving terminal can use prior art to obtain the mapping that the highest order in the designator feeding back AGI is corresponding
The MCS of layer.
Described feed back to transmitting terminal, particularly as follows:
Receiving terminal is by controlling channel by described CQI feedback to transmitting terminal；Described control channel specifically may is that
Physical Downlink Control Channel (PDCCH, physical downlink control channel).
Step 102: transmitting terminal is according to described CQI, it is thus achieved that the MCS that two mapping layers use, uses and obtains
MCS respectively to each mapping layer need send data be modulated.
Specifically, according to high the reflecting of SINR in two mapping layer data that feedback receives of described M-bit
Penetrate designator and the described N-bit highest order in the designator feeding back AGI of the MCS that layer uses,
Obtain the MCS that corresponding mapping layer uses, medium for the designator feeding back AGI according to described N-bit
The designator that progression is corresponding, the MCS obtaining mapping layer employing low for SINR in two mapping layer data compares institute
State the number of degrees of the MCS reduction that mapping layer high for SINR uses, by the MCS of mapping layer high for SINR
Reduce described number of degrees, obtain the MCS that mapping layer low for SINR uses；
For giving an example, it is assumed that the value of N is 3, if the highest for feed back in the designator of AGI
Position is 1, then the designator of M-bit is exactly the MCS of first mapping layer data stream, if being used for feeding back
Highest order in the designator of AGI is 0, then second mapping layer data stream of the designator of M-bit
MCS.According to rear two MCS determining that another mapping layer uses in the designator for feeding back AGI.
If latter two is 00, then showing that two mapping layers use same MCS, if 01, SINR is low
After the MCS that mapping layer uses is exponent number 8 grades of reduction of the MCS that mapping layer high for SINR uses
The MCS that MCS uses as this mapping layer, if 10, the MCS that mapping layer low for SINR uses
For the MCS after exponent number 16 grades of reduction of the MCS of mapping layer employing high for SINR as this mapping
The MCS of layer, if 11, the MCS that mapping layer low for SINR uses is that mapping layer high for SINR uses
The exponent number of MCS reduce the MCS as this layer of the MCS after 24 grades.
After having known the MCS of two mapping layer data, one yard of data is modulated when, respectively
Bit on different mappings data Layer is carried out different modulation, is then mapped to two mapping layers.
Here, transmitting terminal and receiving terminal arrange M-bit the most in advance for feeding back two the mapping layer data received
The designator of the MCS that mapping layer high for middle SINR uses and N-bit are for feeding back the designator of AGI
Position relationship, accordingly, transmitting terminal can know which bit in the described CQI received is for for feeding back
The designator of the MCS that mapping layer high for SINR in two the mapping layer data received uses, which bit is
For feeding back the designator of AGI.
Below in conjunction with embodiment, the present invention is described in further detail again.
The application scenarios of the present embodiment is: M is 5 bits, and N is 3 bits, and in CQI, M is front
5 bits, N is rear 3 bits.
The pilot frequency information that base station sends according to UE carries out channel estimation, according to estimating that the channel obtained obtains two
The SINR that individual mapping layer data are corresponding.Base station calculates two SINR corresponding to mapping layer data, it is assumed that the
The SINR height that one mapping layer data is corresponding, then the extreme higher position in 3 bits is 1, then two map the number of plies
According to corresponding SINR difference, represent the number of degrees that the MCS that second mapping layer uses reduces designator,
And the corresponding relation of number of degrees can see below form:
| The difference of corresponding SINR | Designator | Number of degrees |
| Less than 8dB | 00 | 0 |
| More than or equal to 8dB less than 16dB | 01 | 8 |
| More than or equal to 16dB less than 24dB | 10 | 16 |
| More than or equal to 24dB | 11 | 24 |
The absolute value of the difference according to SINR corresponding to two mapping layer data, determines two mapping layer data
The MCS that the mapping layer higher than described SINR for MCS that mapping layer low for middle SINR uses uses reduces
The designator that number of degrees is corresponding, specifically, if the difference of SINR corresponding to two mapping layer data is exhausted
To value less than 8dB, then arranging latter two is 00, if the difference of SINR corresponding to two mapping layer data
Absolute value more than or equal to 8dB and less than 16dB, then arranging latter two is 01, if two map the numbers of plies
More than or equal to 16dB and being less than 24dB according to the absolute value of the difference of corresponding SINR, arranging latter two is 10,
If the absolute value of the difference of the SINR that two mapping layer data are corresponding is more than or equal to 24dB, then after arranging two
Position is 11.Wherein, if mapping layer low for SINR in two mapping layer data this send data acquisition
MCS is the MCS of top step number, then the MCS that low for SINR in two mapping layer data mapping layer uses
The number of degrees that the MCS that the mapping layer higher than described SINR uses reduces is zero.
If SINR more corresponding than second mapping layer data for SINR corresponding to first mapping layer data is high by 9
Individual dB, then rear two positions is 01, and first five of described CQI uses for first mapping layer of feedback
MCS。
After base station determines described CQI, by controlling channel by described CQI feedback to UE.
After UE receives described CQI, from for feeding back the highest order the designator of AGI and described CQI
First five determines the MCS that first mapping layer uses；Afterwards according in the designator for feeding back AGI
Rear two MCS determining that second mapping layer uses, specifically, if latter two is 00, then show two
Individual mapping layer uses same MCS, and if 01, the MCS that mapping layer low for SINR uses is SINR
MCS after exponent number 8 grades of reduction of the MCS that high mapping layer uses uses as this mapping layer
MCS, if 10, the MCS that mapping layer low for SINR uses is that mapping layer high for SINR uses
The exponent number of MCS reduces the MCS as this mapping layer of the MCS after 16 grades, if 11, SINR
The MCS that low mapping layer uses is that the exponent number of the MCS that mapping layer high for SINR uses reduces by 24 grades
After MCS as the MCS of this layer.
After UE is aware of the MCS that two mapping layers use, one yard of data is modulated when, point
Other bit on different mappings data Layer is carried out different modulation, be then mapped to two mapping layers.Here,
It is further assumed that first five instruction of the described CQI that receives of UE is 13, the modulation system of 13 correspondences is
QPSK (QPSK, Quadrature Phase Shift Keying) is modulated, and therefore, then has first
The MCS that individual mapping layer uses is QPSK modulation, is 01 due to latter two afterwards, and second mapping layer is adopted
MCS reduce by 8 grades, the then modulation methods that MCS is 5,5 correspondences that second mapping layer uses
Formula is 16 quadrature amplitude modulation (QAM, Quadrature Amplitude Modulation), then have second to reflect
The MCS penetrating layer employing is 16QAM.Therefore, one yard of data is modulated when, to the first two ratio
Special data carry out QPSK modulation, and back to back four Bit datas are carried out 16QAM modulation, to connecing again
The two bits of data carries out QPSK modulation, by that analogy, interts and modulates, be then mapped to first mapping
The MCS of the data acquisition of layer just modulates for QPSK, is mapped to the MCS of the data acquisition of second mapping layer
Just for 16QAM.
For realizing said method, present invention also offers a kind of band processing system, as in figure 2 it is shown, this is
System includes: receiving terminal 21 and transmitting terminal 22；Wherein,
Receiving terminal 21, for the SINR corresponding according to two the mapping layer data received, determines CQI, and
Feed back to transmitting terminal 22；Wherein, described CQI includes: two mapping layers that M-bit receives for feedback
The designator of the MCS that mapping layer high for SINR in data uses and N-bit are for feeding back the finger of AGI
Show symbol；
Transmitting terminal 22, after the CQI receiving receiving terminal 21 feedback, transmitting terminal, according to described CQI, obtains
Obtain the MCS that two mapping layers use, use the MCS obtained that each mapping layer needs the number of transmission respectively
According to being modulated.
Wherein, described receiving terminal 21 can further include: determines module 211 and sending module 212；
Wherein,
Determine module 211, for the SINR corresponding according to two the mapping layer data received, determine CQI,
And the CQI determined is sent to sending module 212；
Sending module 212, after receiving and determining the CQI that module 211 sends, gives transmitting by CQI feedback
End 22.
Described determine module 211, specifically for:
Carry out channel estimation according to the pilot frequency information received, obtain two mapping layer data respectively corresponding
SINR, according to two SINR, determines the designator for feeding back AGI in CQI, and is used for described
Feed back the designator of the MCS of mapping layer corresponding to the highest order in the designator of AGI, insert described M ratio
In spy.
According to two SINR, determine in CQI when the designator feeding back AGI, described determine mould
Block 211, specifically for:
Designator corresponding for mapping layer high for SINR in two mapping layer data is inserted highest order；And according to
The absolute value of the difference of the SINR that two mapping layer data are corresponding, determines that in two mapping layer data, SINR is low
The number of degrees that reduces of the MCS that uses of higher than described SINR for the MCS mapping layer that uses of mapping layer, and
Designator corresponding for the number of degrees determined is inserted in the remaining bits in described N-bit.
Described sending module 212, specifically for:
By controlling channel by described CQI feedback to transmitting terminal 22.
Described transmitting terminal 22 can further include: obtains module 221 and modulation module 222；Wherein,
Obtain module 221, for according to described CQI, it is thus achieved that the MCS that two mapping layers use, and will obtain
The MCS obtaining two mapping layers employings is sent to modulation module 222；
Modulation module 222, after receiving the MCS obtaining two mapping layers employings that module 221 sends,
The MCS obtained is used to need the data sent to be modulated each mapping layer respectively.
Wherein, described acquisition module 221, specifically for: two received for feedback according to described M-bit
The designator of the MCS that mapping layer high for SINR in individual mapping layer data uses and described N-bit are for anti-
Highest order in the designator of feedback AGI, it is thus achieved that the MCS that corresponding mapping layer uses, according to described N ratio
The special designator corresponding for the medium progression of designator feeding back AGI, obtains SINR in two mapping layer data
The number of degrees that the MCS that the mapping layer higher than described SINR for MCS that low mapping layer uses uses reduces,
The MCS of mapping layer high for SINR is reduced described number of degrees, obtains what mapping layer low for SINR used
MCS。
The above, only presently preferred embodiments of the present invention, it is not intended to limit the protection model of the present invention
Enclose.
Claims (11)
1. a baseband processing method, it is characterised in that the method includes:
Receiving terminal is according to Signal to Interference plus Noise Ratio corresponding to two mapping layer data receiving
SINR, determines channel quality indicator CQI, and feeds back to transmitting terminal；Wherein, described CQI
Including: M-bit mapping layer high for SINR in two mapping layer data that feedback receives is adopted
The designator of modulation coding mode MCS and N-bit uneven for feeding back antenna gain
The designator of weighing apparatus AGI；
Transmitting terminal is according to described CQI, it is thus achieved that the MCS that two mapping layers use, and uses and obtains
MCS respectively to each mapping layer need send data be modulated.
Method the most according to claim 1, it is characterised in that described receiving terminal foundation
The SINR that two mapping layer data receiving are corresponding, determines CQI, for:
Receiving terminal carries out channel estimation according to the pilot frequency information received, and obtains two the most respectively and reflects
Penetrate the SINR that layer data is corresponding；
According to two SINR, determine the designator for feeding back AGI in CQI；
Afterwards by mapping layer corresponding for the described highest order being used for feeding back in the designator of AGI
The designator of MCS, inserts in described M-bit.
Method the most according to claim 2, it is characterised in that described according to two SINR,
Determine the designator for feeding back AGI in CQI, for:
Designator corresponding for mapping layer high for SINR in two mapping layer data is inserted highest order；
The absolute value of the difference according to SINR corresponding to two mapping layer data, determines that two reflect
Penetrate the mapping layer higher than described SINR for MCS that mapping layer low for SINR in layer data uses
The number of degrees that the MCS used reduces, and designator corresponding for the number of degrees determined is inserted institute
State in the remaining bits in N-bit.
Method the most according to claim 1, it is characterised in that described in feed back to transmitting
End, for:
Receiving terminal is by controlling channel by described CQI feedback to transmitting terminal.
5. according to the method described in any one of Claims 1-4, it is characterised in that described
Transmitting terminal is according to described CQI, it is thus achieved that the MCS that two mapping layers use, for:
High according to described M-bit SINR in two mapping layer data that feedback receives
The designator of the MCS that mapping layer uses and described N-bit are in the designator feeding back AGI
Highest order, it is thus achieved that the MCS that mapping layer high for SINR in said two mapping layer data uses；
Afterwards according to described N-bit for feeding back the finger that the medium progression of designator of AGI is corresponding
Showing symbol, the MCS ratio obtaining mapping layer employing low for SINR in two mapping layer data is described
The number of degrees that the MCS that mapping layer high for SINR uses reduces, by mapping layer high for SINR
MCS reduces described number of degrees, obtains the MCS that mapping layer low for SINR uses.
6. a band processing system, it is characterised in that this system includes: receiving terminal and send out
Penetrate end；Wherein,
Receiving terminal, for the SINR corresponding according to two the mapping layer data received, determines CQI,
And feed back to transmitting terminal；Wherein, described CQI includes: M-bit is for feeding back two received
The designator of the MCS that mapping layer high for SINR in individual mapping layer data uses and N-bit
For feeding back the designator of AGI；
Transmitting terminal, for receive receiving terminal feedback CQI after, transmitting terminal according to described CQI,
Obtain the MCS that two mapping layers use, use the MCS obtained respectively each mapping layer to be needed
Data to be sent are modulated.
System the most according to claim 6, it is characterised in that described receiving terminal enters one
Step comprises determining that module and sending module；Wherein,
Determine module, for the SINR corresponding according to two the mapping layer data received, determine
CQI, and the CQI determined is sent to sending module；
Sending module, after receiving and determining the CQI that module sends, gives CQI feedback
Penetrate end.
System the most according to claim 7, it is characterised in that described determine module,
Specifically for:
Carry out channel estimation according to the pilot frequency information received, obtain two mapping layer data pair respectively
The SINR answered, according to two SINR, determines the designator for feeding back AGI in CQI,
And by the MCS's of mapping layer corresponding for the described highest order being used for feeding back in the designator of AGI
Designator, inserts in described M-bit.
System the most according to claim 7, it is characterised in that according to two SINR,
Determine in CQI when the designator feeding back AGI, described determine module, specifically for:
Designator corresponding for mapping layer high for SINR in two mapping layer data is inserted highest order；
And the absolute value of the difference according to SINR corresponding to two mapping layer data, determine two mappings
The mapping layer higher than described SINR for MCS that mapping layer low for SINR in layer data uses is adopted
The number of degrees that reduces of MCS, and designator corresponding for the number of degrees determined is inserted described
In remaining bits in N-bit.
10. according to the system described in any one of claim 6 to 9, it is characterised in that described
Transmitting terminal farther includes: obtain module and modulation module；Wherein,
Obtain module, for according to described CQI, it is thus achieved that the MCS that two mapping layers use,
And the MCS obtaining two mapping layers employings is sent to modulation module；
Modulation module, after receiving the MCS obtaining two mapping layers employings that module sends,
The MCS obtained is used to need the data sent to be modulated each mapping layer respectively.
11. systems according to claim 10, it is characterised in that described acquisition module,
Specifically for:
High according to described M-bit SINR in two mapping layer data that feedback receives
The designator of the MCS that mapping layer uses and described N-bit are in the designator feeding back AGI
Highest order, it is thus achieved that the MCS that mapping layer high for SINR in said two mapping layer data uses,
According to described N-bit for feeding back the designator that the medium progression of designator of AGI is corresponding,
The MCS that mapping layer low for SINR in two mapping layer data uses is higher than described SINR
The number of degrees that reduces of the MCS that uses of mapping layer, the MCS of mapping layer high for SINR is dropped
Low described number of degrees, obtains the MCS that mapping layer low for SINR uses.
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| CN201110115553.8A CN102769485B (en) | 2011-05-05 | 2011-05-05 | A kind of baseband processing method and system |
| PCT/CN2011/078731 WO2012149710A1 (en) | 2011-05-05 | 2011-08-22 | Baseband processing method and system |
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| CN103905162B (en) * | 2012-12-27 | 2017-06-16 | 华为技术有限公司 | A kind of system power distribution method and equipment |
| KR20170028983A (en) | 2014-07-11 | 2017-03-14 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Data transmission method, user equipment and base station |
| JP6522757B2 (en) * | 2014-11-21 | 2019-05-29 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Method, apparatus and device for determining modulation and coding order |
| CN110048800B (en) * | 2018-01-15 | 2020-09-25 | 大唐移动通信设备有限公司 | MCS (modulation and coding scheme) grade adjusting method and base station |
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| CN101478786A (en) * | 2008-01-04 | 2009-07-08 | 华为技术有限公司 | Method, system and apparatus for uploading feedback information |
| CN101572585A (en) * | 2008-04-29 | 2009-11-04 | 华为技术有限公司 | Method and device for acquiring mapping relation between data MCS and CQI code rate |
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| CN101478786A (en) * | 2008-01-04 | 2009-07-08 | 华为技术有限公司 | Method, system and apparatus for uploading feedback information |
| CN101572585A (en) * | 2008-04-29 | 2009-11-04 | 华为技术有限公司 | Method and device for acquiring mapping relation between data MCS and CQI code rate |
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