CN104158626B - The method of sending and receiving and device of a kind of precoding information - Google Patents
The method of sending and receiving and device of a kind of precoding information Download PDFInfo
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- CN104158626B CN104158626B CN201410401357.0A CN201410401357A CN104158626B CN 104158626 B CN104158626 B CN 104158626B CN 201410401357 A CN201410401357 A CN 201410401357A CN 104158626 B CN104158626 B CN 104158626B
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Abstract
The invention discloses a kind of method of sending and receiving of precoding information and device, methods described includes：Terminal obtains broadband precoding instruction PMI；The MSB of broadband PMI described in the terminal-pair carries out information separately encoded or after being encoded the MSB of the broadband PMI and N-bit other information combined coding, wherein, MSB is a part of the broadband PMI, and N is natural number；The terminal sends the information after encoding to data sending terminal.Embodiments of the invention by the PMI of broadband MSB carry out it is separately encoded after and send or with N-bit other information carry out combined coding after and send, improve the reliability of broadband precoding information, reduce error propagation, so as to further increase the code performance that prelists.
Description
Technical field
The present invention relates to communication technical field, the method for sending and receiving and device of more particularly to a kind of precoding information.
Background technology
With the continuous development of the communication technology, in order to improve the performance of data transfer, data sending terminal (such as NodeB (nodes
B), BS (Base station, base station) etc.) can be according to terminal (such as UE (User Equipment, user equipment), MS
(Mobile Station, mobile station) etc.) feedback precoding information (such as PMI (Precoding Matrix Indicator,
Pre-coding matrix instruction) and the code book that locally prestores, terminal is re-send to after being pre-processed to data to be sent, so may be used
So that the change of data transmission procedure adaptive channel state, so as to improve the performance of data transfer.Therefore, how to send and connect
It is most important to receive above-mentioned precoding information.
Existing 3GPP LTE R8 (3rd Generation Partnership Project Long Term
Evolution Release 8, third generation partnership project Long Term Evolution released version 8) system uses single code book, its precoding
Matrix is indexed by single PMI (precoding matrix indicator, pre-coding matrix instruction), can be passed through respectively
PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) and PUSCH (Physical
Uplink Shared Channel, Physical Uplink Shared Channel) periodically reported with aperiodicity.
During the present invention is realized, inventor has found that prior art at least has problems with：
Broadband precoding matrix instruction PMI easily causes error propagation.Therefore, it is necessary to further research reports pattern,
To improve systematic function.
The content of the invention
The embodiments of the invention provide a kind of method of sending and receiving of precoding information and device, to improve systematicness
Energy.
On the one hand, the embodiment provides a kind of sending method of precoding information, methods described to include：
Terminal obtains broadband precoding instruction PMI；
The MSB of broadband PMI described in the terminal-pair carries out separately encoded or the MSB of the broadband PMI and N-bit is other
Information consolidation encoded after information, wherein, MSB be the broadband PMI a part, N is natural number；
The terminal sends the information after encoding to data sending terminal.
On the one hand, the embodiments of the invention provide a kind of method of reseptance of precoding information, methods described to include：
Information after the coding that data sending terminal receiving terminal is sent；
Wherein, the information after the coding is：To the MSB of the broadband PMI after terminal acquisition broadband precoding instruction PMI
Information that is separately encoded or obtaining the MSB of the broadband PMI and N-bit other information combined coding is carried out, wherein, MSB is
A part of the broadband PMI, N are natural number.
On the other hand, the embodiments of the invention provide a kind of dispensing device of precoding information, including：
Information acquisition unit, for obtaining broadband precoding instruction PMI；
Information coding unit, for the MSB of the broadband PMI is carried out it is separately encoded or by the MSB of the broadband PMI with
N-bit other information combined coding encoded after information, wherein, MSB be the broadband PMI a part, N is nature
Number；
Information transmitting unit, for sending the information after described information coding unit coding to data sending terminal.
On the other hand, the embodiments of the invention provide a kind of reception device of precoding information, including：
Information receiving unit, for the information after the coding of receiving terminal transmission；
Wherein, the information after the coding is：To the MSB of the broadband PMI after terminal acquisition broadband precoding instruction PMI
Information that is separately encoded or obtaining the MSB of the broadband PMI and N-bit other information combined coding is carried out, wherein, MSB is
A part of the broadband PMI, N are natural number.
Embodiment provided in an embodiment of the present invention is by carrying out separately encoded rear and transmission or and N to the MSB in the PMI of broadband
After bit other information progress combined coding and send, improve the reliability of broadband precoding information, reduce error propagation,
So as to further increase the code performance that prelists.
Brief description of the drawings
Fig. 1 is a kind of method flow schematic diagram for sending and receiving precoding information provided in an embodiment of the present invention；
A kind of schematic diagram of Fig. 2 encoded infonnation resource impacts on PUSCH provided in an embodiment of the present invention；
The schematic diagram of Fig. 3 another encoded infonnation resource impacts on PUSCH provided in an embodiment of the present invention；
Fig. 4 is the method flow schematic diagram that another kind provided in an embodiment of the present invention sends and receives precoding information；
Fig. 5 is a kind of structural representation of the dispensing device of precoding information provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation of the reception device of precoding information provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to Fig. 1, the embodiments of the invention provide a kind of method for sending precoding information, the system bandwidth is divided
For at least one subband, methods described includes：
101：Terminal obtains broadband PMI；
Specifically, terminal can obtain broadband PMI according to default criterion, naturally it is also possible to according to other in the prior art
Method obtain broadband PMI；So that terminal obtains broadband PMI according to default criterion as an example, terminal can be based on default criterion 1
Broadband precoding matrix instruction PMI is calculated, specifically as shown in formula (1)：
Wherein WjRepresent a code word in this C of solid size, f1(Wj) represent with default 1 corresponding system bandwidth of criterion and
Pre-coding matrix WjObject function.It should be noted that above-mentioned default criterion 1 can be throughput-maximized criterion, should
Object function corresponding to criterion can be throughput-maximized function, and the throughput-maximized function can be based on information capacity
Calculate and realize, deformation (weighting of such as mutual information) that can also be based on mutual information or mutual information is realized.Default criterion 1 is appearance
Amount maximizes the embodiment of criterion with upper similar, and here is omitted.Certainly can also according to practical application situation, pair with it is default
Criterion corresponding to object function flexibly set, this is not specifically limited.
Or terminal is based on default criterion 2 and calculates broadband precoding matrix instruction PMI, specifically such as formula (2) (3) institute
Show：
WhereinA pre-coding matrix is represented, it is two matrixesWithFunction.Square
Battle arrayWithPass through j respectivelyk,1And jk,2Obtained from two code book C1 and C2 indexes, the two is respectively used to the width for representing channel
Band characteristic and frequency selectivity characteristic.Represent and 2 corresponding system bandwidth of pre-set criteria and broadband precoding matrixObject function.fs(i,Wj) represent subband i and pre-coding matrix W corresponding with pre-set criteria 2jObject function, NSFor
Form the sub-band sum of system bandwidth.Herein, j is claimedk,1It is broadband PMI for broadband precoding matrix instruction.
It should be noted that above-mentioned default criterion 2 can be throughput-maximized criterion, target letter corresponding to the criterion
Number can be throughput-maximized function, and the throughput-maximized function can calculate to realize based on information capacity, can also
Deformation (weighting of such as mutual information) based on mutual information or mutual information is realized.Certainly can also be right according to practical application situation
Object function corresponding with default criterion is flexibly set, and this is not specifically limited.
Further, after broadband PMI is obtained, can also include：
102：Terminal-pair broadband PMI MSB (Most Significant bits, highest order) carries out separately encoded；
Wherein, MSB can be a part of the broadband PMI.
Specifically, the broadband PMI obtained in step 101 MSB (Most Significant Bits, highest order) uses a0,
a1,a2,a3,...,aA-1Represent, wherein A is broadband PMI MSB bit numbers.
The broadband PMI obtained in step 101 MSB (can be referred to 3GPP LTE by terminal with (20, an A) code
TS36.212V9.0.0) encoded, wherein the code word of (20, A) code is the linear combination of 13 basic sequences, the basic sequence can
To be expressed as Mi,n, i=0 ..., 19；N=0 ..., 12, specific Mi,nIt can define as in 3GPP LTE TS36.212V9.0.0
Shown in table 5.2.3.3-1.Bit after coding can be expressed as b0,b1,b2,b3,...,b19, wherein each bit can represent
For
Certainly can also according to practical application situation, pair with use coding method flexibly selected, this is not done and had
Body limits.
In addition it should be noted that the MSB of the broadband PMI can be a part or the institute of the broadband PMI
State broadband PMI whole bits.Wherein when MSB is a part of the broadband PMI, one to being only the broadband PMI
Point MSB carry out it is separately encoded and transmit, it is separately encoded compared to whole broadband PMI and transmit saving expense.And MSB makees
For PMI fundamental component information, even if remaining PMI component information such as LSB (the Least Significant in addition to MSB
Bits lowest orders) it is not correctly transmitted, the influence to systematic function is also smaller.
103：The terminal sends the information after encoding to data sending terminal；
Specifically, terminal can be sent out by the information after the Physical Uplink Control Channel PUCCH transmissions coding to data
Sending end.Further, when the information after the coding is sent by PUCCH, can use and order instruction (RI) identical week
Phase.
Or
Terminal can pass through the information after the Physical Uplink Shared Channel PUSCH transmissions coding to data transmitting terminal.
Further, the information after the coding can be mapped to by channel interleaver close to PUSCH demodulation pilot tone or
The both sides of person's reference signal (Reference Signal, RS), as shown in Fig. 2 or Fig. 3, S0 to S13 is represented in a subframe
SC-FDMA symbols, position shown in MSB square frames is the position that be mapped to of encoded infonnation, and RS square frames show RS institutes in figure
The position being mapped to.
Further, as PUSCH, using MIMO, (how defeated mulitiple input multiple output, multi input be
Go out) multilayer transmission when, the information after the coding, which may map on all layers, to be transmitted.
104：Information after the coding that data sending terminal receiving terminal is sent；
Specifically, data sending terminal can receive the coding that the terminal is sent by Physical Uplink Control Channel PUCCH
Information afterwards.
Or
Specifically, data sending terminal can receive the coding that the terminal is sent by Physical Uplink Shared Channel PUSCH
Information afterwards.
Further, receive what the terminal was sent by Physical Uplink Shared Channel PUSCH in the data sending terminal
During information after coding, the information after the coding can be mapped to by channel interleaver close to demodulation pilot tone or with reference to letter
Number both sides, as shown in MSB in Fig. 2 or 3 position receive.
It should be further stated that mapping relations, the mapping be present between precoding instruction PMI and pre-coding matrix
Relation causes the distance between pre-coding matrix corresponding to two different PMI of highest order MSB to be more than different two of lowest order LSB
The distance between pre-coding matrix corresponding to individual PMI, the distance can be defined as string away from：
dA,B=| | AHB-BAH||F (5)
Wherein, dA,BTwo matrix As of expression and B string are away from wherein matrix A is identical with B dimensions, AHRepresenting matrix A conjugation
Transposition, | | | |FRepresent Frobenius norms.Certainly can also be according to practical application situation, the definition adjusted the distance is carried out flexibly
Definition, is not specifically limited to this.
It should be noted that above-mentioned broadband PMI MSB can include a broadband PMI part or whole broadbands
PMI。
Furthermore, it is necessary to explanation, data sending terminal, can also be with passing through it after above-mentioned broadband PMI MSB is obtained
Either frequency selectivity precoding information obtains reliable broadband or frequency selectivity together in the broadband that its feedback system obtains
Pre-coding matrix.
The method for sending and receiving precoding information described in the embodiment of the present invention, by being carried out to the MSB in the PMI of broadband
It is separately encoded and send, the reliability of broadband precoding information is improved, reduces error propagation, it is pre- so as to further increase
Coding efficiency.
Referring to Fig. 2, the embodiments of the invention provide a kind of method for sending precoding information, the system bandwidth is divided
For at least one subband, methods described includes：
201：Terminal obtains broadband PMI；
Specifically, terminal can obtain broadband PMI according to default criterion, naturally it is also possible to according to other in the prior art
Method obtain broadband PMI；So that terminal obtains broadband PMI according to default criterion as an example, terminal can be based on default criterion 1
Broadband precoding matrix instruction PMI is calculated, specifically as shown in formula (1).Certainly can also according to practical application situation, pair with it is pre-
If criterion corresponding to object function flexibly set, this is not specifically limited.
Or terminal is based on default criterion 2 and calculates broadband precoding matrix instruction PMI, specifically such as formula (2) (3) institute
Show.Certainly can also be according to practical application situation, a pair object function corresponding with default criterion is flexibly set, to this not
It is specifically limited.
Further, after broadband PMI is obtained, can also include：
202：Terminal-pair broadband PMI MSB and N-bit other information combined coding；Wherein, MSB is the broadband PMI's
A part.
Specifically, the broadband PMI obtained in step 201 MSB (Most Significant Bits, highest order) A ratios
Spy represents that N-bit other information can be other bits in addition to the MSB of the broadband PMI, such as can be order instruction RI,
Or can be hybrid automatic repeat-request HARQ response (ACK/NACK) information.Terminal by the MSB of the broadband PMI with it is described
N-bit other information merges into the bit sequence that a length is A+N.
Further, bit sequence of the terminal by the length for A+N, is encoded by (20, an A+N) code, should
Coding can use the similar coding of embodiment illustrated in fig. 1.
Certainly can also according to practical application situation, pair with use coding method flexibly selected, this is not done and had
Body limits.
In addition it should be noted that the MSB of the broadband PMI can be a part or the institute of the broadband PMI
State broadband PMI whole bits.
203：The terminal sends the information after encoding to data sending terminal；
Specifically, terminal can be sent out by the information after the Physical Uplink Control Channel PUCCH transmissions coding to data
Sending end.Further, when the information after the coding is sent by PUCCH, can use and order instruction (RI) identical week
Phase.
Or
Terminal can pass through the information after the Physical Uplink Shared Channel PUSCH transmissions coding to data transmitting terminal.
Further, the information after the coding can be mapped to by channel interleaver close to PUSCH demodulation pilot tone or
The both sides of person's reference signal (Reference Signal, RS), as shown in Fig. 2 or Fig. 3, S0 to S13 is represented in a subframe
SC-FDMA symbols, position shown in MSB square frames is the position that be mapped to of encoded infonnation, and RS square frames show RS institutes in figure
The position being mapped to.
Further, as PUSCH, using MIMO, (how defeated mulitiple input multiple output, multi input be
Go out) multilayer transmission when, the information after the coding, which may map on all layers, to be transmitted.
204：Information after the coding that data sending terminal receiving terminal is sent
Specifically, data sending terminal can receive the coding that the terminal is sent by Physical Uplink Control Channel PUCCH
Information afterwards.
Or
Specifically, data sending terminal can receive the coding that the terminal is sent by Physical Uplink Shared Channel PUSCH
Information afterwards.
Further, receive what the terminal was sent by Physical Uplink Shared Channel PUSCH in the data sending terminal
During information after coding, the information after the coding can be mapped to by channel interleaver close to demodulation pilot tone or with reference to letter
Number both sides, as shown in MSB in Fig. 2 or Fig. 3 position receive.
It should be further stated that mapping relations, the mapping be present between precoding instruction PMI and pre-coding matrix
Relation causes the distance between pre-coding matrix corresponding to two different PMI of highest order MSB to be more than different two of lowest order LSB
The distance between pre-coding matrix corresponding to individual PMI, the distance can be defined as string away from specifically as shown in formula (5).Certainly may be used also
So that according to practical application situation, the definition adjusted the distance flexibly is defined, and this is not specifically limited.
It should be noted that above-mentioned broadband PMI MSB can include a broadband PMI part or whole broadbands
PMI。
Furthermore, it is necessary to explanation, data sending terminal, can also be with passing through it after above-mentioned broadband PMI MSB is obtained
Either frequency selectivity precoding information obtains reliable broadband or frequency selectivity together in the broadband that its feedback system obtains
Pre-coding matrix.
The method for sending and receiving precoding information described in the embodiment of the present invention, by the MSB and N in the PMI of broadband
Bit other information carries out combined coding and sent, and improves the reliability of broadband precoding information, reduces error propagation, from
And further increase the code performance that prelists.
Referring to Fig. 5, corresponding above method embodiment, the embodiments of the invention provide a kind of transmission of precoding information dress
Put, the system that at least one subband is divided into suitable for bandwidth, described device includes：
Information acquisition unit 301, for obtaining broadband precoding instruction PMI；
Specifically, terminal can obtain broadband PMI according to default criterion, naturally it is also possible to according to other in the prior art
Method obtain broadband PMI；So that terminal obtains broadband PMI according to default criterion as an example, described information acquiring unit is based on pre-
If criterion 1 calculate the broadband precoding matrix instruction PMI, specifically as shown in formula (1).
Or described information acquiring unit is based on default criterion 2 and calculates broadband precoding matrix instruction PMI, specifically such as
Shown in formula (2) (3).
Certainly can also be according to practical application situation, a pair object function corresponding with default criterion is flexibly set,
This is not specifically limited.
Information coding unit 302, it is separately encoded or by the broadband PMI for being carried out to the MSB of the broadband PMI
MSB and N-bit other information combined coding encoded after information, wherein, MSB is a part of the broadband PMI, and N is
Natural number；
Information transmitting unit 303, for sending the information after described information coding unit coding to data sending terminal.
Wherein, the dispensing device of precoding information can be specifically terminal in the embodiment of the present invention.
The device of transmission precoding information described in the embodiment of the present invention, by individually being compiled to the MSB in the PMI of broadband
Code after and send or with N-bit other information carry out combined coding after and send, improve the reliability of broadband precoding information,
Reduce error propagation, so as to further increase the code performance that prelists.
Referring to Fig. 6, corresponding above method embodiment, the embodiments of the invention provide a kind of reception of precoding information dress
Put, the system that at least one subband is divided into suitable for bandwidth, described device includes：
Information receiving unit 601, for the information after the coding of receiving terminal transmission.Wherein, the information after the coding
For：MSB progress after terminal acquisition broadband precoding instruction PMI to the broadband PMI is separately encoded or by the broadband PMI
The information that MSB obtains with N-bit other information combined coding, wherein, MSB is a part of the broadband PMI, and N is natural number.
The device of reception precoding information described in the embodiment of the present invention, is entered by receiving terminal to the MSB in the PMI of broadband
Row it is separately encoded after and send information or with N-bit other information carry out combined coding after and send information, improve width
Reliability with precoding information, reduces error propagation, so as to further increase the code performance that prelists.
Data sending terminal in above-described embodiment can be NodeB (node B), BS (Base station, base station), family
Base station, or relay station etc., terminal can be UE (User Equipment, user equipment), MS (Mobile in above-described embodiment
Station, mobile station).
Above example provide technical scheme in all or part of content can be realized by software programming, its software
Program storage is in the storage medium that can be read, and storage medium is for example：Hard disk, CD or floppy disk in computer.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (15)
1. a kind of sending method of precoding information, it is characterised in that methods described includes：
Terminal obtains broadband precoding instruction PMI；
The terminal by a part of the broadband PMI and N-bit order instruction RI combined codings, wherein, the one of the broadband PMI
Part includes the MSB of the broadband PMI, and lowest order LSB, N including the broadband PMI are not natural number；
The terminal sends the information after encoding to data sending terminal.
2. according to the method for claim 1, it is characterised in that
The terminal sends the information after encoding to data sending terminal, is specially：The terminal passes through Physical Uplink Control Channel
PUCCH sends the information after the coding by Physical Uplink Shared Channel PUSCH.
3. according to the method for claim 2, it is characterised in that
In the information after the terminal sends the coding by Physical Uplink Shared Channel PUSCH, the letter after the coding
Breath is mapped to the both sides close to demodulation pilot tone or reference signal by channel interleaver.
4. according to the method for claim 1, it is characterised in that：Precoding, which indicates to exist between PMI and pre-coding matrix, reflects
Relation is penetrated, the mapping relations cause the distance between pre-coding matrix corresponding to two different PMI of highest order MSB to be more than most
The distance between pre-coding matrix corresponding to two different low level LSB PMI.
5. according to the method for claim 2, when PUSCH uses multiple-input and multiple-output MIMO multilayer transmissions, the coding
Information MAP afterwards is to transmitting on all layers.
6. a kind of method of reseptance of precoding information, it is characterised in that methods described includes：
Information after the coding that data sending terminal receiving terminal is sent；
Wherein, the information after the coding is：A broadband PMI part and N-bit order instruction RI combined codings, wherein, it is described
A broadband PMI part includes the MSB of the broadband PMI, and lowest order LSB, N including the broadband PMI are not natural number.
7. according to the method for claim 6, it is characterised in that：
Information after the coding that data sending terminal receiving terminal is sent, is specifically included：The data sending terminal passes through physical uplink
Control channel PUCCH passes through Physical Uplink Shared Channel PUSCH and receives the information after the coding that the terminal is sent.
8. according to the method for claim 7, it is characterised in that：
Information after the data sending terminal receives the coding of the terminal transmission by Physical Uplink Shared Channel PUSCH
When, the information after the coding is mapped to the both sides close to demodulation pilot tone or reference signal by channel interleaver.
9. according to the method for claim 6, it is characterised in that：Precoding, which indicates to exist between PMI and pre-coding matrix, reflects
Relation is penetrated, the mapping relations cause the distance between pre-coding matrix corresponding to two different PMI of highest order MSB to be more than most
The distance between pre-coding matrix corresponding to two different low level LSB PMI.
A kind of 10. dispensing device of precoding information, it is characterised in that including：
Information acquisition unit, for obtaining broadband precoding instruction PMI；
Information coding unit, for by a part of the broadband PMI and N-bit order instruction RI combined codings, wherein, the width
A part with PMI includes the MSB of the broadband PMI, and lowest order LSB, N including the broadband PMI are not natural number；
Information transmitting unit, for sending the information after described information coding unit coding to data sending terminal.
11. device according to claim 10, it is characterised in that
Described information transmitting element, is specifically used for：By Physical Uplink Control Channel PUCCH or pass through Physical Uplink Shared Channel
PUSCH sends the information after the coding.
12. device according to claim 11, it is characterised in that
When the information after the coding is sent by Physical Uplink Shared Channel PUSCH, the information after the coding passes through channel
Interleaver is mapped to the both sides close to demodulation pilot tone or reference signal.
A kind of 13. reception device of precoding information, it is characterised in that including：
Information receiving unit, for the information after the coding of receiving terminal transmission；
Wherein, the information after the coding is：A broadband PMI part and N-bit order instruction RI combined codings, wherein, it is described
A broadband PMI part includes the MSB of the broadband PMI, and lowest order LSB, N including the broadband PMI are not natural number.
14. device according to claim 13, it is characterised in that：
Described information receiving unit, is specifically used for：By Physical Uplink Control Channel PUCCH or pass through Physical Uplink Shared Channel
PUSCH receives the information after the coding that the terminal is sent.
15. device according to claim 14, it is characterised in that：
When the information after the coding of the terminal transmission is received by the Physical Uplink Shared Channel PUSCH, after the coding
Information by channel interleaver be mapped to close to demodulation pilot tone or reference signal both sides.
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| CN201010184063.9A CN102255703B (en) | 2010-05-19 | 2010-05-19 | Precoding information transmission and receiving methods and devices |
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