CN110445594A - A kind of non-orthogonal pilot design method of data transmission auxiliary - Google Patents
A kind of non-orthogonal pilot design method of data transmission auxiliary Download PDFInfo
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- CN110445594A CN110445594A CN201910674732.1A CN201910674732A CN110445594A CN 110445594 A CN110445594 A CN 110445594A CN 201910674732 A CN201910674732 A CN 201910674732A CN 110445594 A CN110445594 A CN 110445594A
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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
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
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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
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
Abstract
The present invention relates to a kind of non-orthogonal pilot design methods of data transmission auxiliary, belong to demodulated reference signal design and channel estimation technique field.Candidate spatial to estimated channel parameter is reduced to the set of limited size from entire complex field, further according to historical channel or the amplitude of LLR is demodulated or decodes check results, therefrom select most suitable channel；In most suitable channel, it is based on factor G- Design non-orthogonal data transmissions mode, constructs nonopiate DMRS transmission mode and transmission symbol, and then carry out signal estimation, and final progress data recovery accordingly using non-orthogonal pilot and data aggregate.The non-orthogonal pilot design method can reduce the demand to pilot resources, do not promoted complexity and in the limited situation of resource, a large amount of DMRS ports are provided；The accuracy compared with existing scheme of the performance of channel estimation improves, and data recovery performance is good.
Description
Technical field
The present invention relates to a kind of data transmission auxiliary non-orthogonal pilot design method, belong to demodulated reference signal design with
And channel estimation technique field.
Background technique
With the development of Communication in China technology, gradually perfect, the user of tri- large scene of 5G (eMBB, URLLC, mMTC) application
Quantity also gradually increases, and the application of NOMA (Non-orthogonal Multiple Access) is also increasingly extensive, and pilot tone is
One of the factor for influencing NOMA performance quality needs more DMRS ports to realize letter based on the extensive superposed transmission of NOMA
Road estimation.But existing technology can bring bigger time delay, higher computation complexity, therefore need to study while meeting multiterminal
Mouth, low time delay, high accuracy DMRS (Demodulation Reference Signal, demodulated reference signal) pattern and
CE (Channel Estimation, channel estimation) method.DMRS is in LTE for the related solution of PUSCH to PUCCH channel
It adjusts.Existing research direction mainly includes the following aspects: 1) sequence design of orthogonal DMRS, including is based on Gold
QPSK, DFT-S-OFDM and Zadoff-Ch sequence of Sequence.2) additional DMRS is added to improve weak user in NOMA
Detection accuracy.Orthogonal DMRS, the orthogonal DMRS of standard and non-DMRS three types are divided into according to research contents.It studies orthogonal
DMRS's has Fujitsu (sparse pattern), LG (SIC-based CE), Intel (OCC).It can using orthogonal DMRS
Guarantee accuracy, but reduces resource utilization, and be limited to DMRS port number.The quasi- orthogonal DMRS's of research has three magnitudes public
Department, and ZTE research be Data-Only transmission mode, data and channel Combined estimator may be implemented, but will lead to very big
Search complexity.Because blind Channel Estimation needs according to all possible channel status of data search and therefrom to select excellent；It is assumed that 1
It is superimposed N number of user on RE, wherein the constellation sizes of each user are M, then there may be M on the RENA constellation point, it is one corresponding
Size is MNChannel parameter candidate collection (index magnitude), this is larger by the complexity that will lead to search.
Therefore it studies while meeting multiport, low time delay, high accuracy and there is the DMRS pattern of data transmission auxiliary to be
This patent is dedicated to solving the problems, such as.
Summary of the invention
The case where present invention increases sharply for number of users, and in view of pilot tone can have significant impact to the performance of NOMA, it proposes
A kind of non-orthogonal pilot design method of data transmission auxiliary.
The core concept of the non-orthogonal pilot design method of the data transmission auxiliary are as follows:
Channel estimation is carried out using non-orthogonal pilot and data aggregate, and carries out data recovery according to channel estimation results,
Specifically: the candidate spatial to estimated channel parameter is reduced to the set of limited size from entire complex field, further according to history
Channel or the amplitude or decoding check results for demodulating LLR, therefrom select most suitable channel；In most suitable channel, it is based on
Factor G- Design non-orthogonal data transmissions mode constructs nonopiate DMRS transmission mode and transmission symbol, and then utilization is non-just
It hands over pilot tone and data aggregate to carry out signal estimation, and final progress data recovery accordingly, i.e., passes through in receiving end to nonopiate number
It is M by the size reduction of channel parameter candidate collection according to the Combined Treatment and interference deletion with nonopiate DMRS；
Wherein, transmission symbol includes conventional pilot symbol and difference frequency pilot sign.
The data transmission system that the non-orthogonal pilot design method of the data transmission auxiliary is relied on includes DMRS transmitting terminal
And the receiving end DMRS；
Wherein, DMRS transmitting terminal uses the parallel SIC of multiple originating subscribers, for weak users of power/or SIC back
User sends orthogonal DMRS and sends one of orthogonal two kinds of DMRS to history BER minimum user；
The receiving end DMRS is received using SIC, in three kinds of iterative receiver based on DataGraph and DmrsGraph factor graph
One kind；
A kind of non-orthogonal pilot design method of data transmission auxiliary, based on such as giving a definition:
Define 1: non-orthogonal data transmissions factor graph DataGraph={ B, S, E }；
Wherein, B={ Bi, i=1 ... } and represent user node；
S={ Sj, j=1 ... } and data transmission is represented using running time-frequency resource lattice node；
Wherein, running time-frequency resource lattice, that is, Resource Element, abbreviation RE；Running time-frequency resource lattice node is also referred to as RE node；
EijRepresent BiIn SjThe upper side for sending data；
The set of E representative edge；
XijIt indicates in EijThe complex data symbols of transmission；
Definition 2: nonopiate DMRS transmission factor figure DmrsGraph={ B, Sdmrs, Eo, Ediff}；
Wherein, B is identical as the B meaning in DataGraph in definition 1；
SdmrsIt represents DMRS and transmits the RE node used；EoRepresent the side for sending conventional pilot symbol, EdiffIt is poor to represent transmission
Divide the side of frequency pilot sign；
Define 3: user BiIn SjSide information when upper transmission routine DMRS is Eo_ ij, the symbol transmitted at this time are denoted as P, should
Symbol P is known in DMRS transmitting terminal and the receiving end DMRS；
Define 4: user BiIn SjThe upper side for sending difference DMRS symbol is denoted as Ediff_ij；
Define 5:Eo_rec,Ediff_ rec respectively indicates nonopiate DMRS and sends sequence and position；
The collection for defining 6: regulation Sj adjacent user node side is combined into N^B_Sj_ E ', definition and BiAdjacent RE node side
Collection be combined into N^S_Bi_E'；Wherein, E ' can be EoOr Ediff；
The non-orthogonal pilot design method of data transmission auxiliary, DmrsGrap design including DMRS transmitting terminal and
The DmrsGraph of the receiving end DMRS is designed；
Wherein, the DmrsGrap design of DMRS transmitting terminal, comprising the following steps:
Step 1: determining that DMRS transmits the RE node S useddmrsAnd it is initialized according to non-orthogonal data transmissions mapping relations
DataGraph={ B, S, E }；
Wherein, B, S and E meaning in DataGraph are shown in definition 1；
Step 2: initialization DmrsGraph={ B, Sdmrs,Eo,Ediff}；
Wherein, DmrsGraph is shown in definition 2；DMRS transmits the RE node S useddmrsIt is determined by step 1, E0And EdiffQuilt
It is initialized as empty set；B in DataGraph is identical as the B meaning in DmrsGraph；
Step 3: initialization Eo_rec,Ediff_ rec is empty set；
Step 4: judge whether B is empty, and judging result whether be empty according to B, terminates this method or skip to step 5,
Specifically:
If 4.1 B are sky, i.e., all transformation tasks terminate, and export Eo_ rec and Ediff_ rec, and according to Eo_ rec and Ediff_
Rec sends DMRS and data, terminates this method；
Wherein, E is exportedo_ rec and Ediff_ rec respectively indicates nonopiate DMRS and sends sequence and position, i.e.,
DMRSpattern；
After sending data, it is Y that corresponding receiving end, which receives data,data；After sending DMRS, corresponding receiving end receives data
For Ydmrs；
If 4.2 B are not sky, step 5 is skipped to；
Step 5: will be with SjThe quantity on adjacent user node side is according to | N^B_Sj_ E | J=[j is lined up from small to large1, j2,
j3…]；
Wherein, | N^B_Sj_ E | it represents and RE node SjThe quantity on adjacent all user node sides；
For the element that system initialization loop count, setting operating mode Boolean and cycle count maximum value are J
Number, is denoted as Jmax, loop initialization count value idx=1；
Wherein, SjIt represents data and transmits j-th of the RE node used；
N^B_Sj_ E is represented and SjThe set on adjacent user node side；
Step 6: element in the J generated according to step 5 judges current j*N^B_S in the case of=J (idx)j *_EoAnd N^
B_Sj *_EdiffIf N^B_Sj *_EoAnd N^B_Sj *_EdiffIt is all empty set, then skips to step 7；Otherwise idx=idx+1 is enabled, is skipped to
6.A；
Wherein, j*From j1Start, successively j2, j3... j*Subscript, that is, idx；
Wherein, j*The label of previous cycle is represented, J (idx) represents i-th dx member in the sequence J generated in step 5
Element；Sj *Represent jth*A RE node；N^B_Sj *_EoRepresent send conventional pilot when and Sj *The set on adjacent user node side；N
^B_Sj *_EdiffRepresent send difference pilot tone when and Sj *The set on adjacent user node side；
6.A: judge whether loop count idx has reached cycle count maximum value Jmax, and determine how to carry out we
Method, specifically:
If having reached cycle count maximum value Jmax, then S is extendeddmrsAnd skip to step 1；If it is not, then skipping to step 7；
Wherein, S is extendeddmrsRefer to the number for increasing RE；
Step 7: judgement | N^B_Sj_ E | whether it is equal to 1, is to then follow the steps 7.A, otherwise executes 7.B, specifically:
7.A: if at this time | N^B_Sj_ E |=1, represent N^B_S at this timej *Only one element in _ E, i.e., and Sj *Adjacent use
Amount only has 1, is denoted as Bk；Skip to step 8；
7.B: if at this time | N^B_Sj_ E | it is not equal to 1, then finds N^B_Sj *In _ E power it is maximum/or code rate it is minimum/or by
The strongest user of degree of protection, is denoted as Bk, by Eo_kj*It is added to EoAnd EoIn _ rec；To all N^B_Sj *B in _ EW(w ≠ k),
It willIt is added to EdiffAnd EdiffIn _ rec, step 8 is skipped to；
Wherein, Eo_kj*Indicate user k in jth*The side information of conventional pilot is sent on a RE；EoAnd Eo_ rec is shown in definition 2
With definition 5；BW(w ≠ k) represents the other users node of non-user k；
Step 8: to N^S_BkAll RE node S in _ Em, by EkmLeave out from E；To N^Sdmrs_Bk_EoIn it is all
Sdmrs_ n, by Eo_ kn is from EoIn leave out；To all N^Sdmrs_Bk_EdiffIn Sdmrs_ n, by Ediff_ kn is from EdiffIn leave out；Most
Afterwards by BkLeave out from set B, then goes to step 4；
Wherein, N^Sdmrs_Bk_EoFor with user node BkThe set on adjacent transmission conventional pilot RE node side；Sdmrs_n
It represents DMRS and transmits n-th of the node used；Eo_ kn indicates that user k sends the side letter of conventional pilot on n-th of RE node
Breath；N^Sdmrs_Bk_EdiffIt indicates and user node BkThe set on adjacent transmission difference pilot tone RE node side；Ediff_ kn indicates to use
Family k sends the side information of difference pilot tone on n-th of RE node；
The DmrsGrap of the receiving end DMRS is designed, comprising the following steps:
Step I: judging whether the set B of user node is empty, and decide whether to terminate this method of reseptance, specifically:
I.1 if so, completing this method；
I.2 if it is not, then skipping to step II；
Step II: all RE node S are foundj1…Sjk…SjK, wherein each SjkCan guarantee to meet condition 1 simultaneously) and
Condition 2), or only meet condition 3) when, record user Bik, wherein i is the counting variable since 1:
1)N^B_Sjk_EdiffContained in N^B_Sjk_E；
2) from set N^B_SjkLeave out N^B_S in _ Ejk_EdiffIn all elements after, only Yu an element,
It is denoted as Bik；
3)|N^B_Sjk_ E |=1 or | N^B_Sjk_Ediff|+|N^B_Sjk_Eo|=1；
Wherein, SjKIt represents user k and transmits j-th of the RE node used；N^B_Sjk_EdiffRepresent send difference pilot tone when with
SjKThe set on adjacent user node side；N^B_Sjk_ E is represented when sending data and SjKThe set on adjacent user node side；N^
B_Sjk_EoRepresent send conventional pilot when and SjKThe set on adjacent user node side；
Step III: according to all B found in step IIik, for each Bik, data is added estimation with dmrs may
Channel parameter, can obtain channel parameter candidate collection size be M；Data recovery is carried out using the M channel parameter, selects and most closes
Suitable channel parameter；
Wherein " most suitable " be defined as making demodulating the sum of LLR absolute value maximize keep CRC check correct or make with it is upper
One of a moment channel parameter antipode minimum；
Step IV: all B are completedikData restore after, according to " passing through the data of verification " reconstruct send signal and
The DMRS of transmission, then by the two respectively from YdataAnd YdmrsIn leave out, and leave out these above-mentioned B from Bik；From N^B_Sjk_E
And N^B_Sjk_EdiffIn leave out and BikRelevant side is eventually returned to step I；
If no parity check link, above-mentioned " passing through the data of verification " is modified to " all data "；
Wherein, YdataAnd YdmrsIt indicates that nonopiate DMRS sends the corresponding reception data of sequence, sees DMRS transmitting terminal
The step 4 of DmrsGraph design.
Beneficial effect
The non-orthogonal pilot design method of data transmission auxiliary of the present invention has as follows compared with existing pilot design
The utility model has the advantages that
1. the non-orthogonal pilot design method of data transmission auxiliary can reduce pair compared with existing orthogonal DMRS technology
The demand of pilot resources supports more DMRS ports in the not increased situation of resource consumption, that is, supports more users
Number, because this method is non-orthogonal DMRS；
2. complexity is held essentially constant in the case where increasing number of users；
3. the accuracy compared with existing scheme of the performance of channel estimation improves, and data recovery performance is good.
Detailed description of the invention
Fig. 1 is to propose in definition 1-5 in the non-orthogonal pilot design method of data proposed by the present invention transmission auxiliary
Non-orthogonal data transmissions factor graph；
Fig. 2 is that nonopiate DMRS defined in the non-orthogonal pilot design method of data proposed by the present invention transmission auxiliary is passed
Defeated factor graph；
Fig. 3 is data transmission resources and DMRS in the non-orthogonal pilot design method of data proposed by the present invention transmission auxiliary
The transmission mode of transfer resource；
Fig. 4 is embodiment 1:PDMA8UE in the non-orthogonal pilot design method of data proposed by the present invention transmission auxiliary
The factor graph that 4RE is defined.
Specific embodiment
With reference to the accompanying drawing and specific embodiment sets a kind of non-orthogonal pilot of data transmission auxiliary of the present invention
Meter method is described in detail.
Embodiment 1
This example illustrates a kind of application non-orthogonal pilot design method bases of data transmission auxiliary of the present invention
In non-orthogonal data transmissions mode and factor graph representation method, nonopiate mapping mode and the transmission of DMRS of DMRS are designed
Symbol (including conventional pilot symbol EoWith difference frequency pilot sign Ediff)；
Construction is deleted using linear between received data and received DMRS, by linearly calculating and interfere in receiving end
Then orthogonal RE completes channel estimation according to lesser channel parameter search space and data is restored.
Fig. 1 is the implementation diagram that nonorthogonal data transmission factor figure defines 1, and the group of DataGraph has been marked in figure
At B, S and E；Wherein B={ Bi, i=1 ... } and represent user node, S={ Sj, j=1 ... } and data transmission is represented using running time-frequency resource
Lattice (RE) node, the set of E representative edge；Work as BiIn SjWhen upper transmission data, EijBelong to set E, there are 8 user nodes in figure, 4
A RE node；
Fig. 2 is the implementation diagram that DMRS transmission factor figure defines 2；Wherein EoIt represents and sends conventional pilot symbol
Side, EdiffRepresent the side for sending difference frequency pilot sign；
As user BiIn SjWhen upper transmission routine DMRS, then EoIn include element Eo_ ij, the symbol transmitted at this time are denoted as P,
The symbol is all known in sending and receiving end；
As user BiIn SjWhen upper transmission difference DMRS, then EdiffIn include element Ediff_ij。
Fig. 3 gives data transmission resources and DMRS transfer resource needs to take the mode of neighboring transmission；Solid line in figure
Box is data transmission resources, and spot box is DMRS transfer resource；Due to the variability of channel, by data transmission resources and
DMRS transfer resource neighboring transmission is relatively beneficial to performance boost；
Fig. 4 is one used when the non-orthogonal pilot design method specific implementation of data of the present invention transmission auxiliary
A 7 user, 4 RE factor illustrated examples；According to the design method, it is only necessary to which 3 RE carry out DMRS transmission, have saved 4/
7 resource, thus improve port number.
The above-mentioned co-design to DataGraph and DmrsGraph, main purpose are to guarantee to change every time when Joint iteration
Generation can degree of appearance be 1 user's (ensure BP reception can persistently go on).
Specific the case where considering 6 user 4RE, indicate that the pattern of data and DMRS are as follows with matrix, matrix
Row represents RE, and matrix column represents user, and it is P that wherein user, which sends the general power of pilot tone,.
Wherein, the second row of DMRS can also conduct frequency to enhance the estimation to channel, but not pass in this example；
Above-mentioned DMRS pattern is gone out by following Process Design:
Step A: determining the physical resource of DMRS, there is 4 RE resources in this example, and initializes DataGraph={ B, S, E }
And DmrsGraph={ B, Sdmrs,Eo,Edifd}；Initialize Eo_ rec and Ediff_ rec is empty set；
Step B: it in data, checks the number of users of each RE node, has 3 for each RE node in this example
User, i.e., | N^B_Sjk_ E | it is equal, so directly being recycled according to the label of RE sequence, i.e. J=[1,2,3,4]；
Step C: for j*=1 i.e. Sj *=S1, it is apparent from N^B_Sj *_E0And N^B_Sj *_EdiffIt is all empty set；If j*=5, i.e., 4
DMRS pattern on a RE, which is designed, to be finished, then terminates this algorithm, exports Eo_ rec and Ediff_ rec, i.e., final DMRS
pattern。
Step D: for j*=1, | N^B_Sjk_ E |=3, finding prominent user in RE1 is UE1；Remaining user
For user 3 and user 5；
Step E: the side information that user 1 sends conventional pilot is recorded in EoAnd EoIn _ rec, by remaining user 3 and use
The side information that family 5 sends difference pilot tone is recorded in EdiffAnd EdiffIn _ rec；
Step F: all data side informations relevant to user 1 and DMRS side information are all deleted, continue to design next
The pattern of DMRS on a RE；j*=j*+ 1, return to step C；
Following example is the example of receiving end algorithm design:
After the DMRS that transmitting terminal has sent above-mentioned design, follow the steps below:
The 1st user on a: the 1 RE of step meets the condition in the DmrsGrap design procedure II of the receiving end DMRS
And condition b) a)；
Step b: data is added with dmrs, and the signal of user can be restored by carrying out data recovery further according to channel parameter, such as
Shown in lower:
Wherein, dotted portion is the signal for being mainly used to estimation channel, and bold portion is data relevant to this step
And dmrs；
The 6th user on c: the 2 RE of step meets the condition in the DmrsGrap design procedure II of the receiving end DMRS
And condition b) a)；
Step d: based on the signal restored in step b, then the signal of user 1 is deleted, then data is added with dmrs can be extensive
It is multiplexed the signal at family 6, as follows:
The 4th user on e: the 3 RE of step meets the condition in the DmrsGrap design procedure II of the receiving end DMRS
c)；
Step f: based on the signal restored in step d, then deleting the signal of user 6, then data be added with dmrs, according to
Channel parameter can restore the signal of user 4, as follows:
The 2nd user on g: the 4 RE of step meets the condition in the DmrsGrap design procedure II of the receiving end DMRS
And condition b) a)；
Step h: based on the signal restored in step f, then deleting the signal of user 4, then data be added with dmrs, according to
Channel parameter can restore the signal of user 2, as follows:
Step i: similarly, the signal of the user 1, user 2, user 4, user 6 that are deleted based on above-mentioned steps can restore user
3 and user 5 signal, it is as follows:
Above-mentioned example transmits the DMRS of 6 users using 3RE, saves resource.The core of DMRS pattern design is thought
Road is after guaranteeing each channel estimation, deletion, can to access the RE that a degree is 1, gives a data transmission
Pattern, so that it may obtain a DMRS pattern.
Above-described specific descriptions have carried out further specifically the purpose of invention, technical scheme and beneficial effects
It is bright, it should be understood that the above is only a specific embodiment of the present invention, the protection model being not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (5)
1. a kind of non-orthogonal pilot design method of data transmission auxiliary, it is characterised in that: the data transmission system of support includes
DMRS transmitting terminal and the receiving end DMRS；
Wherein, DMRS transmitting terminal uses the parallel SIC of multiple originating subscribers, for the user of weak users of power/or SIC back
It sends orthogonal DMRS and one of orthogonal two kinds of DMRS is sent to history BER minimum user；
The receiving end DMRS is using one in SIC reception, three kinds of iterative receiver based on DataGraph and DmrsGraph factor graph
Kind；
The non-orthogonal pilot design method of shown data transmission auxiliary, based on such as giving a definition:
Define 1: non-orthogonal data transmissions factor graph DataGraph={ B, S, E }；
Wherein, B={ Bi, i=1 ... } and represent user node；
S={ Sj, j=1 ... } and data transmission is represented using running time-frequency resource lattice node；
Wherein, running time-frequency resource lattice, that is, Resource Element, abbreviation RE；Running time-frequency resource lattice node is also referred to as RE node；
EijRepresent BiIn SjThe upper side for sending data；
The set of E representative edge；
XijIt indicates in EijThe complex data symbols of transmission；
Definition 2: nonopiate DMRS transmission factor figure DmrsGraph={ B, Sdmrs, Eo, Ediff}；
Wherein, B is identical as the B meaning in DataGraph in definition 1；
SdmrsIt represents DMRS and transmits the RE node used；EoRepresent the side for sending conventional pilot symbol, EdiffTransmission difference is represented to lead
The side of frequency symbol；
Define 3: user BiIn SjSide information when upper transmission routine DMRS is Eo_ ij, the symbol transmitted at this time are denoted as P, the symbol
P is known in DMRS transmitting terminal and the receiving end DMRS；
Define 4: user BiIn SjThe upper side for sending difference DMRS symbol is denoted as Ediff_ij；
Define 5:Eo_rec,Ediff_ rec respectively indicates nonopiate DMRS and sends sequence and position；
Define 6: regulation SjThe collection on adjacent user node side be combined into N^B_Sj_ E ', definition and BiThe collection on adjacent RE node side
It is combined into N^S_Bi_E'；Wherein, E ' can be EoOr Ediff；
The non-orthogonal pilot design method of the data transmission auxiliary, DmrsGrap design and DMRS including DMRS transmitting terminal
The DmrsGraph of receiving end is designed；
Wherein, the DmrsGrap design of DMRS transmitting terminal, comprising the following steps:
Step 1: determining that DMRS transmits the RE node S useddmrsAnd it is initialized according to non-orthogonal data transmissions mapping relations
DataGraph={ B, S, E }；
Wherein, B, S and E meaning in DataGraph are shown in definition 1；
Step 2: initialization DmrsGraph={ B, Sdmrs,Eo,Ediff}；
Wherein, DmrsGraph is shown in definition 2；DMRS transmits the RE node S useddmrsIt is determined by step 1, E0And EdiffIt is initial
Turn to empty set；B in DataGraph is identical as the B meaning in DmrsGraph；
Step 3: initialization Eo_rec,Ediff_ rec is empty set；
Step 4: judging whether B is empty, and judging result whether be empty according to B, terminate this method or skip to step 5, specifically
Are as follows:
If 4.1 B are sky, i.e., all transformation tasks terminate, and export Eo_ rec and Ediff_ rec, and according to Eo_ rec and Ediff_rec
DMRS and data are sent, this method is terminated；
Wherein, E is exportedo_ rec and Ediff_ rec respectively indicates nonopiate DMRS and sends sequence and position, i.e. DMRS pattern；
After sending data, it is Y that corresponding receiving end, which receives data,data；After sending DMRS, corresponding receiving end receives data and is
Ydmrs；
If 4.2 B are not sky, step 5 is skipped to；
Step 5: will be with SjThe quantity on adjacent user node side is according to | N^B_Sj_ E | J=[j is lined up from small to large1, j2,
j3...]；
Wherein, | N^B_Sj_ E | it represents and RE node SjThe quantity on adjacent all user node sides；
The number for the element that system initialization loop count, setting operating mode Boolean and cycle count maximum value are J, note
For Jmax, loop initialization count value idx=1；
Wherein, SjIt represents data and transmits j-th of the RE node used；
N^B_Sj_ E is represented and SjThe set on adjacent user node side；
Step 6: element in the J generated according to step 5 judges current j*N^B_S in the case of=J (idx)j *_EoAnd N^B_Sj *_
EdiffIf N^B_Sj *_EoAnd N^B_Sj *_EdiffIt is all empty set, then skips to step 7；Otherwise idx=idx+1 is enabled, 6.A is skipped to；
Wherein, j*From j1Start, successively j2, j3... j*Subscript, that is, idx；
Wherein, j*The label of previous cycle is represented, J (idx) represents i-th dx element in the sequence J generated in step 5；Sj *
Represent jth*A RE node；N^B_Sj *_EoRepresent send conventional pilot when and Sj *The set on adjacent user node side；N^B_
Sj *_EdiffRepresent send difference pilot tone when and Sj *The set on adjacent user node side；
6.A: judge whether loop count idx has reached cycle count maximum value Jmax, and determine how to carry out this method,
Specifically:
If having reached cycle count maximum value Jmax, then S is extendeddmrsAnd skip to step 1；If it is not, then skipping to step 7；
Step 7: judgement | N^B_Sj_ E | whether it is equal to 1, is to then follow the steps 7.A, otherwise executes 7.B, specifically:
7.A: if at this time | N^B_Sj_ E |=1, represent N^B_S at this timej *Only one element in _ E, i.e., and Sj *Adjacent number of users
Only 1, it is denoted as Bk；Skip to step 8；
7.B: if at this time | N^B_Sj_ E | it is not equal to 1, then finds N^B_Sj *In _ E power it is maximum/or code rate it is minimum/or protected
The strongest user of degree, is denoted as Bk, by Eo_kj*It is added to EoAnd EoIn _ rec；To all N^B_Sj *B in _ EW(w ≠ k), willIt is added to EdiffAnd EdiffIn _ rec, step 8 is skipped to；
Wherein, Eo_kj*Indicate user k in jth*The side information of conventional pilot is sent on a RE；EoAnd Eo_ rec, which is shown in, to be defined 2 and determines
Justice 5；BW(w ≠ k) represents the other users node of non-user k；
Step 8: to N^S_BkAll RE node S in _ Em, by EkmLeave out from E；To N^Sdmrs_Bk_EoIn all Sdmrs_
N, by Eo_ kn is from EoIn leave out；To all N^Sdmrs_Bk_EdiffIn Sdmrs_ n, by Ediff_ kn is from EdiffIn leave out；Finally will
BkLeave out from set B, then goes to step 4；
Wherein, N^Sdmrs_Bk_EoFor with user node BkThe set on adjacent transmission conventional pilot RE node side；Sdmrs_ n is represented
DMRS transmits n-th of the node used；Eo_ kn indicates that user k sends the side information of conventional pilot on n-th of RE node；N^
Sdmrs_Bk_EdiffIt indicates and user node BkThe set on adjacent transmission difference pilot tone RE node side；Ediff_ kn indicates that user k exists
The side information of difference pilot tone is sent on n-th of RE node；
The DmrsGrap of the receiving end DMRS is designed, comprising the following steps:
Step I: judging whether the set B of user node is empty, and decide whether to terminate this method of reseptance, specifically:
I.1 if so, completing this method；
I.2 if it is not, then skipping to step II；
Step II: all RE node S are foundj1…Sjk…SjK, wherein each SjkCan guarantee to meet condition 1 simultaneously) and condition
2), or only meet condition 3) when, record user Bik, wherein i is the counting variable since 1:
1)N^B_Sjk_EdiffContained in N^B_Sjk_E；
2) from set N^B_SjkLeave out N^B_S in _ Ejk_EdiffIn all elements after, only Yu an element, be denoted as Bik；
3)|N^B_Sjk_ E |=1 or | N^B_Sjk_Ediff|+|N^B_Sjk_Eo|=1；
Wherein, SjKIt represents user k and transmits j-th of the RE node used；N^B_Sjk_EdiffRepresent send difference pilot tone when and SjKPhase
The set on adjacent user node side；N^B_Sjk_ E is represented when sending data and SjKThe set on adjacent user node side；N^B_
Sjk_EoRepresent send conventional pilot when and SjKThe set on adjacent user node side；
Step III: according to all B found in step IIik, for each Bik, data is added to the possible letter of estimation with dmrs
Road parameter, can obtain channel parameter candidate collection size is M；Data recovery is carried out using the M channel parameter, is selected most suitable
Channel parameter；
Step IV: all B are completedikData restore after, if there is calibration link, the data of recovery are verified, and according to
" passing through the data of verification " reconstruct signal sent and the DMRS of transmission, then by the two respectively from YdataAnd YdmrsIn leave out,
And leave out these above-mentioned B from Bik；From N^B_Sjk_ E and N^B_Sjk_EdiffIn leave out and BikRelevant side, is eventually returned to step
I。
2. a kind of non-orthogonal pilot design method of data transmission auxiliary according to claim 1, it is characterised in that: step
" most suitable " is defined as making demodulating the sum of LLR absolute value and maximizes or keep CRC check correct or make and the last moment believes in III
One of road parameter antipode minimum.
3. a kind of non-orthogonal pilot design method of data transmission auxiliary according to claim 1, it is characterised in that: 6.A
In, extend SdmrsRefer to the number for increasing RE.
4. a kind of non-orthogonal pilot design method of data transmission auxiliary according to claim 1, it is characterised in that: step
In IV, if no parity check link, above-mentioned " passing through the data of verification " is modified to " all data ".
5. a kind of non-orthogonal pilot design method of data transmission auxiliary according to claim 1, it is characterised in that: step
In IV, YdataAnd YdmrsIt indicates that nonopiate DMRS sends the corresponding reception data of sequence, sees that the DmrsGraph of DMRS transmitting terminal is set
The step 4 of meter.
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