CN104135344B - 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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- CN104135344B CN104135344B CN201410400536.2A CN201410400536A CN104135344B CN 104135344 B CN104135344 B CN 104135344B CN 201410400536 A CN201410400536 A CN 201410400536A CN 104135344 B CN104135344 B CN 104135344B
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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 and indicates 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 coding to data sending terminal.Embodiments of the invention are by carrying out separately encoded rear and transmission to the MSB in the PMI of broadband or carrying out after combined coding and send with N-bit other information, improve the reliability of broadband precoding information, error propagation is reduced, 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 continuing to develop for 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
Receive above-mentioned precoding information most important.
Existing 3GPP LTE R8 (3rd Generation Partnership Project Long Term
Evolution Release 8, third generation partnership project Long Term Evolution released version 8) system use 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 indicates that 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 includes：
Terminal obtains broadband precoding and indicates PMI；
The MSB of broadband PMI described in the terminal-pair carries out separately encoded or the MSB and N-bit of the broadband PMI 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 coding 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 includes：
Information after the coding that data sending terminal receiving terminal is sent；
Wherein, the information after the coding is：Terminal obtains the MSB to the broadband PMI after 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 is natural number.
On the other hand, the embodiments of the invention provide a kind of dispensing device of precoding information, including：
Information acquisition unit, PMI is indicated for obtaining broadband precoding；
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 after information receiving unit, the coding sent for receiving terminal；
Wherein, the information after the coding is：Terminal obtains the MSB to the broadband PMI after 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 is natural number.
Embodiment provided in an embodiment of the present invention to the MSB in the PMI of broadband by carrying out separately encoded rear and sending or and N
Bit other information is carried out after combined coding and sent, and is improved the reliability of broadband precoding information, is reduced 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 another method flow schematic diagram for sending and receiving precoding information provided in an embodiment of the present invention；
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
Calculate the broadband precoding matrix and indicate PMI, specifically as shown in formula (1)：
Wherein WjRepresent a code word in this C of solid size, f1(Wj) represent with the corresponding system bandwidth of default criterion 1 and
Pre-coding matrix WjObject function.It should be noted that above-mentioned default criterion 1 can be throughput-maximized criterion, should
The corresponding object function of 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 maximize criterion embodiment with it is upper similar, here is omitted.Certainly can also according to practical application situation, pair with it is default
The corresponding object function of criterion 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 broadband for representing channel
Characteristic and frequency selectivity characteristic.Represent and the corresponding system bandwidth of pre-set criteria 2 and broadband precoding matrix
Object function.Represent subband i and pre-coding matrix W corresponding with pre-set criteria 2jObject function, NSTo constitute
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, the corresponding target letter of 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, it 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.
Terminal can be with (20, an A) code (with reference to 3GPPLTE TS by the broadband PMI obtained in step 101 MSB
36.212 V9.0.0) 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 such as the V9.0.0 of 3GPP LTE TS 36.212
Shown in middle table 5.2.3.3-1.Bit after coding can be expressed as b0,b1,b2,b3,...,b19, wherein each bit can be with table
It is shown as
Certainly can also according to practical application situation, pair with use coding method flexibly selected, this is not done and had
Body is limited.
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 and transmit saving expense compared to whole broadband PMI.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 coding to data sending terminal；
Specifically, terminal can be sent the information after the coding by Physical Uplink Control Channel PUCCH and be sent out to data
Sending end.Further, when sending the information after the coding by PUCCH, it can use and order instruction (RI) identical week
Phase.
Or
Terminal can send the information after the coding to data transmitting terminal by Physical Uplink Shared Channel PUSCH.
Further, the information after the coding can be mapped to by channel interleaver close to PUSCH demodulate 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 that RS square frames show RS institutes in the position that be mapped to of encoded infonnation, figure
The position being mapped to.
Further, as PUSCH, using MIMO, (how defeated mulitiple input multiple output, multi input is
Go out) multilayer transmission when, the information after the coding may map on all layers and transmit.
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, precoding indicates there are mapping relations, the mapping between PMI and pre-coding matrix
Relation causes the distance between different corresponding pre-coding matrixes of two PMI of highest order MSB to be more than different two of lowest order LSB
The distance between corresponding pre-coding matrix of 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 carries out flexible
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
The broadband or frequency selectivity precoding information that its feedback system is obtained obtain reliable broadband or frequency selectivity together
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, error propagation is reduced, so as to further increase pre-
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
Calculate the broadband precoding matrix and indicate PMI, specifically as shown in formula (1).Certainly can also according to practical application situation, pair with it is pre-
If the corresponding object function of criterion 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, it 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) uses 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, terminal is encoded the bit sequence that the length is A+N by (20, an A+N) code, should
Coding can be using 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 is limited.
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 coding to data sending terminal；
Specifically, terminal can be sent the information after the coding by Physical Uplink Control Channel PUCCH and be sent out to data
Sending end.Further, when sending the information after the coding by PUCCH, it can use and order instruction (RI) identical week
Phase.
Or
Terminal can send the information after the coding to data transmitting terminal by Physical Uplink Shared Channel PUSCH.
Further, the information after the coding can be mapped to by channel interleaver close to PUSCH demodulate 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 that RS square frames show RS institutes in the position that be mapped to of encoded infonnation, figure
The position being mapped to.
Further, as PUSCH, using MIMO, (how defeated mulitiple input multiple output, multi input is
Go out) multilayer transmission when, the information after the coding may map on all layers and transmit.
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, precoding indicates there are mapping relations, the mapping between PMI and pre-coding matrix
Relation causes the distance between different corresponding pre-coding matrixes of two PMI of highest order MSB to be more than different two of lowest order LSB
The distance between corresponding pre-coding matrix of 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, 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
The broadband or frequency selectivity precoding information that its feedback system is obtained obtain reliable broadband or frequency selectivity together
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, correspondence above method embodiment, the embodiments of the invention provide a kind of transmission of precoding information dress
Put, it is adaptable to which the system that bandwidth is divided at least one subband, described device includes：
Information acquisition unit 301, PMI is indicated for obtaining broadband precoding；
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 indicate 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, is carried out separately encoded or by the broadband PMI for the MSB to 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,
Error propagation is reduced, so as to further increase the code performance that prelists.
Referring to Fig. 6, correspondence above method embodiment, the embodiments of the invention provide a kind of reception of precoding information dress
Put, it is adaptable to which the system that bandwidth is divided at least one subband, described device includes：
Information after information receiving unit 601, the coding sent for receiving terminal.Wherein, the information after the coding
For：Terminal obtains separately encoded or by the broadband PMI to the MSB progress of the broadband PMI after broadband precoding instruction PMI
The information that MSB is obtained 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. should be included in the scope of the protection.
Claims (8)
1. a kind of sending method of precoding information, it is characterised in that methods described includes：
Terminal obtains broadband precoding and indicates PMI；
The terminal MSB of the broadband PMI and order instruction RI combined codings are encoded after information, or the terminal
Information after the MSB of the broadband PMI and hybrid automatic repeat-request HARQ response message combined codings are encoded；
The terminal sends the information after coding to data sending terminal；
Wherein, the MSB is its remaining part for not including the PMI in a part of the broadband PMI, the information after the coding
Point；
The terminal sends the information after coding to data sending terminal, is specially：The terminal passes through the up control of periodic physical
Channel PUCCH processed sends the information after the coding.
2. according to the method described in claim 1, it is characterised in that
The MSB of the broadband PMI is A bits, and the order instruction RI or described HARQ response messages are N-bit, after the coding
Information be 20 bits, the N be positive integer.
3. 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：Terminal obtains broadband precoding and indicated the MSB and order of the broadband PMI after PMI
Indicate the information that RI combined codings are obtained, or by the MSB of the broadband PMI and hybrid automatic repeat-request HARQ response messages
Combined coding encoded after information, wherein, MSB is not wrap in a part of the broadband PMI, the information after the coding
Remainder containing the PMI；
Information after the coding that data sending terminal receiving terminal is sent, is specifically included：The data sending terminal passes through periodicity thing
Manage ascending control channel PUCCH and receive the information after the coding that the terminal is sent.
4. method according to claim 3, it is characterised in that：
The MSB of the broadband PMI is A bits, and the order instruction RI or described HARQ response messages are N-bit, after the coding
Information be 20 bits, the combined coding is is encoded by (20, A+N) code, and the N is positive integer.
5. a kind of dispensing device of precoding information, it is characterised in that including：
Information acquisition unit, PMI is indicated for obtaining broadband precoding；
Information coding unit, for the MSB of the broadband PMI and order instruction RI combined codings to be encoded after information, or
Person the MSB of the broadband PMI and hybrid automatic repeat-request HARQ response message combined codings are encoded after information；
Information transmitting unit, for sending the information after described information coding unit coding to data sending terminal；
Wherein, the MSB is its remaining part for not including the PMI in a part of the broadband PMI, the information after the coding
Point；
Described information transmitting element specifically for：Sent by periodic physical ascending control channel PUCCH after the coding
Information.
6. device according to claim 5, it is characterised in that
The MSB of the broadband PMI is A bits, and the order instruction RI or described HARQ response messages are N-bit, after the coding
Information be 20 bits, the N be positive integer.
7. a kind of reception device of precoding information, it is characterised in that including：
Information after information receiving unit, the coding sent for receiving terminal；
Wherein, the information after the coding is：Terminal obtains broadband precoding and indicated the MSB and order of the broadband PMI after PMI
Indicate the information that RI combined codings are obtained, or by the MSB of the broadband PMI and hybrid automatic repeat-request HARQ response messages
Combined coding encoded after information, wherein, MSB is not wrap in a part of the broadband PMI, the information after the coding
Remainder containing the PMI；
Described information receiving unit specifically for：The terminal is received by periodic physical ascending control channel PUCCH to send
Coding after information.
8. device according to claim 7, it is characterised in that：
The MSB of the broadband PMI is A bits, and the order instruction RI or described HARQ response messages are N-bit, after the coding
Information be 20 bits, the combined coding is is encoded by (20, A+N) code, and the N is positive integer.
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