CN106385300B - Uplink NOMA power distribution methods based on dynamic decoder SIC receivers - Google Patents
Uplink NOMA power distribution methods based on dynamic decoder SIC receivers Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/0026—Interference mitigation or co-ordination of multi-user interference
- H04J11/0036—Interference mitigation or co-ordination of multi-user interference at the receiver
- H04J11/004—Interference mitigation or co-ordination of multi-user interference at the receiver using regenerative subtractive interference cancellation
- H04J11/0043—Interference mitigation or co-ordination of multi-user interference at the receiver using regenerative subtractive interference cancellation by grouping or ordering the users
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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Abstract
The present invention provides a kind of uplink NOMA power distribution methods based on dynamic decoder SIC receivers, the present invention realizes that multiple access accesses using NOMA technologies by power domain, so that same transfer resource is utilized by more users, improves the spectrum efficiency of uplink scene.Simultaneously because the use of the SIC receivers of dynamic adjustment decoding order, obtains compared to the better service quality of other uplinks NOMA.And user's transmission power allocation strategy proposed by the present invention, due to fully considering the service quality of channel situation and CSI poor users, fairness is bad between solving the problems, such as other allocation strategies user, obtains higher transmission performance gain.
Description
Technical field
The present invention relates to a kind of uplink NOMA power distribution methods based on dynamic decoder SIC receivers.
Background technology
The 5th following third-generation mobile communication needs to realize high rate communication, supports a large amount of customer access equipment, and have compared with
Good delay performance and reliability.To realize these targets, non-orthogonal multiple access technology (non-orthogonal
Multiple access, call NOMA in the following text) recommended to apply in the 5th generation communication system by more and more people.In addition, existing skill
Related term in art is as follows：OMA (the orthogonal multiple access accesses of orthogonal multiple access), SIC (successive
Interference cancellation serial interference eliminations), MUST (multiuser superposition
Transmission multi-user's superposed transmission), UE (user equipment user equipmenies).
Successive interference cancellation techniques (the successive interference that NOMA passes through recipient
Cancellation calls SIC in the following text), the decoding of the superposed signal to the multiple users of sender is realized, to reach higher frequency
Compose utilization rate.NOMA be mainly characterized by using power domain realize multiple access access, rather than in previous mobile network using the time,
Frequency range and code word.In conventional orthogonal frequency division multiple access access technology, as bandwidth resource allocation to channel situation (channel state
Information calls CSI in the following text) poor user when, the spectrum efficiency of system will be greatly reduced.And NOMA so that son carry
Wave can be utilized by each user, and the frequency range that a part of poor user is accounted for by the preferable users of CSI point obtains system spectrum
The promotion of efficiency.
Tradition would generally be to the more conveyers of the preferable users of CSI based on the chance transmission strategy that orthogonal multiple access accesses
Meeting runs counter to the requirement of the 5th third-generation mobile communication fairness between user although improving overall system throughput.And it is based on
The transmission strategy of NOMA can evade this problem.
The technical solution of the prior art one:
Third generation cooperative partner program (3rd generation partnership project, call 3GPP in the following text) is for liter
Grade version long-term evolving network (long-term evolution advanced network, call LTE-A in the following text), it is proposed that Yi Zhongke
Applied to the 5th third-generation mobile communication multi-user's superposed transmission (multiuser superposition transmission, under
Claim MUST) mechanism.MUST is a kind of NOMA of downlink scene in fact, and then is produced many different based on MUST mechanism
NOMA is realized.
It is the basic boom description to MUST below.Base station provides service for user A and user B, two of which user's
Signal has different power in identical time domain, code word and band transmissions.Base station is respectively that two users' transmissions are identical
Superposed signal.Different from conventional power allocation strategy (such as water-filling algorithm), being sent to the signal of CSI poor users will be assigned more
More power, so that the signal of other users can be directly decoded the information of oneself by it as noise.And the preferable users of CSI
The information for needing to decode another user first will belong to the dry of another user using SIC in the superposed signal received
Signal cancellation is disturbed, the information of oneself then can just be successfully decoded.
Power partition coefficient is the key that design system in MUST.Assuming that the general power that downlink sends overlapped information is fixed as
P, then the signal of user A and B is respectively with PAAnd PBIt sends.It is to optimize total mutual information or total capacity often in practical application
Criterion designs PAAnd PBValue.
The shortcomings that prior art one:
Although the characteristics of taking full advantage of NOMA compared to MUST, makes spectrum efficiency get a promotion.But it is only proposed
Applications of the NOMA under downlink scene lacks the description to uplink scene；In addition it designs work(according to total capacity or total mutual information
Rate distribution coefficient often leads to the bad problem of fairness between user.
The technical solution of the prior art two:
For NOMA technologies to be applied in uplink scene, there is scholar to devise the transmission strategy of similar MUST.Wherein
There are one base stations and several users's (being assumed to be M) in one cell, wherein by these users according to the distance row to base station
Sequence, the remoter user's path loss of distance (call PL in the following textm) bigger, corresponding serial number is bigger.All users are with a certain fixed work(
Rate sends signal to base station, it is assumed that the transmission power of m-th of user is Pm, Pm=P- (m-1) ρ+10log10(M)+ωPLm, wherein
P and ω is certain fixed constant.Base station uses SIC receivers, according to fixed decoding order, first by other users signal as dry
The information of the maximum user of Decoding Order Number is disturbed, then eliminates the interference of first user in the second large user of Decoding Order Number,
And so on.
The shortcomings that prior art two
Although this scheme gives applications of the rational NOMA in uplink scene, its user's order of demodulation is only first
It is sorted according to path loss magnitude relationship, and is also to be arrived more rearward (i.e. the bigger user of path loss) so that sorting in power allocation procedure
Up to base station it is long when average signal power it is poorer so that the fairness of each user cannot be guaranteed.In addition in this scheme
Fixed decoding order can not reflect instantaneous each user's received signal quality, can not be optimal the performance of demodulation,
The requirement of each user fairness is not achieved.
Applications of the NOMA in uplink scene at present is less, the power distribution strategies of user in existing uplink NOMA mechanism
And base station SIC receiver decoding order strategies are not perfect, the problem of often leading to the transmission potential that cannot give full play to system,
And the service quality of channel situation poor user is difficult to ensure, the advantage of NOMA cannot be embodied.
Invention content
The purpose of the present invention is to provide a kind of uplink NOMA power distribution methods based on dynamic decoder SIC receivers,
It can solve the problems, such as that base station is distributed using transmission power between the decoding order and different user of SIC.
To solve the above problems, the present invention provides a kind of uplink NOMA power distributions based on dynamic decoder SIC receivers
Method, including：
In the cell there are one base station is set, user is divided into several clusters, each cluster includes three users
Cluster shares same ascending resource by NOMA patterns with the user in cluster, different ascending resources is used between different clusters；
Each user sends according to a certain preset fixed transmission power, this power is chosen according to certain criterion
Optimal case；
The base station receives the superposed signal of three users, and is done to the superposed signal by SIC receivers
Disturb the information for eliminating and decoding each user.
Further, in the above-mentioned methods, the base station carries out interference elimination by SIC receivers to the superposed signal
Afterwards, the information of each user is decoded, including：
The base station is decoded using dynamic sequential, is solved to the superposed signal according to instantaneous received power is descending
Code and interference are eliminated, and the information of three users is finally obtained.
Further, in the above-mentioned methods, in the cell there are one base station is set, user is divided into several clusters, often
A cluster includes three user's clusters, shares same ascending resource by NOMA patterns with the user in cluster, between different clusters
Using different ascending resources, including：
In the cell there are one base station is set, user is divided into several clusters, each cluster includes three users
Cluster shares same ascending resource by NOMA patterns with the user in cluster, uses different ascending resources between different clusters, and be
Each cluster distributes the resource of mutually orthogonal time domain, frequency range or code word.
Further, in the above-mentioned methods, each user sends according to a certain preset fixed transmission power, this
Power is the optimal case chosen according to certain criterion, including：
To three users in each cluster, the base station requests obtain the maximum transmission power and biography of each user
The information of transmission rate thresholding, and obtain the PL of each user and average decline system by the detection statistics to the channel long period
Number.
Further, in the above-mentioned methods, by the detection statistics to the channel long period obtain each user PL and
After average fading coefficients, further include：
The base station is first user's Allotment Serial Number 1,2 and 3, wherein sequence according to the product of the PL and average fading coefficients
Number bigger this product of expression is smaller, and the fixed transmission power that corresponding user is assigned to is with regard to smaller, the hair of such m-th of user
Send power that can be expressed as Pm=P- (m-1) ρ+10log10(3)+ωPLm, wherein ω is a given constant, and P and ρ are undetermined
Coefficient, m are the arbitrary value in 1 to 3.
Further, in the above-mentioned methods, the base station is first to use according to the product of the PL and average fading coefficients
After family Allotment Serial Number 1,2 and 3, further include：
Change curve of the flat equal Transmission probability of three users with SNR and ρ is made in base station by preset formula,
In, the average interrupt probability is a kind of evaluation index of service quality, can be sent out when channel capacity is less than given rate threshold
It is raw to interrupt, then in conjunction with the maximum transmission power of each user obtained before, optimal P and ρ values are obtained, and be broadcast to use
Family.
Further, in the above-mentioned methods, it is broadcast to after user, further includes：
User in each cluster completes NOMA transmission by shared resource.
Further, in the above-mentioned methods, the base station carries out interference elimination by SIC receivers to the superposed signal
Afterwards, the information of each user is decoded, including：
The CSI of each user is calculated in base station in real time, in conjunction with known transmission power and PL parameters, be inferred to it is current these three
User receives the sequence of power, its descending is set as user A, B and C；
Base station carries out SIC decodings by dynamic sequential, first using other users signal as the information of interference decoding user A, so
The interference of known user A is eliminated when decoding user B afterwards, and the information of user C continues as distracter.
Compared with prior art, the present invention realizes that multiple access accesses using NOMA technologies by power domain, and same transmission is made to provide
Source is utilized by more users, improves the spectrum efficiency of uplink scene.Simultaneously because dynamic adjusts the SIC receivers of decoding order
Use, obtain compared to the better service quality of other uplinks NOMA.And user's transmission power distribution proposed by the present invention
Strategy solves justice between other allocation strategies user due to fully considering the service quality of channel situation and CSI poor users
The bad problem of property, obtains higher transmission performance gain.
Description of the drawings
Fig. 1 is the configuration diagram of the uplink NOMA systems of one embodiment of the invention；
Fig. 2 is the committed step figure of one embodiment of the invention；
Fig. 3 is the decoded schematic diagrames of base station SIC of one embodiment of the invention；
Fig. 4 is one embodiment of the invention under given rate threshold, average interrupt probability with power distribution strategies change
Change tendency chart；
Fig. 5 is trend chart of the different type receiver average interrupt probability with power distribution strategies.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
The present invention provides a kind of uplink NOMA power distribution methods based on dynamic decoder SIC receivers, including：
User is divided into several clusters, each cluster includes three by step S1 in the cell there are one base station is arranged
A user's cluster is shared same ascending resource by NOMA patterns with the user in cluster, is provided using different uplinks between different clusters
Source；
Step S2, each user send according to a certain preset fixed transmission power, this power is according to certain
The optimal case that criterion is chosen；
Step S3, the base station receive the superposed signal of three users, and by SIC receivers to the superposed signal
It carries out interference elimination and decodes the information of each user.Specifically, in uplink scene as shown in Figure 1, have in a cell
One base station and m user.These users are divided into several cluster (cluster), and each cluster includes three users, it
Same ascending resource is shared by NOMA patterns, different ascending resources are used between different cluster.Each user is according to certain
One preset constant power is sent, this power is the optimal case chosen according to certain criterion.The letter that base station receives
Number it is the superposition of three subscriber signals, interference elimination is carried out by SIC receivers, to decode the information of each user.This
NOMA is applied in uplink communication scene by invention, is mainly solved base station and is sent out using between the decoding order and different user of SIC
The problem of sending power distribution, improves the overall transmission efficiency of system, and fully considers fairness between user.
Preferably, step S3, after the base station carries out interference elimination by SIC receivers to the superposed signal, decoding
Go out the information of each user, including：
The base station is decoded using dynamic sequential, is solved to the superposed signal according to instantaneous received power is descending
Code and interference are eliminated, and the information of three users is finally obtained.Specifically, base station is decoded using dynamic sequential, received according to instantaneous
Power is descending to be decoded and interferes elimination, finally obtains the information of three users.
Preferably, user is divided into several clusters, each cluster by step S1 in the cell there are one base station is arranged
Including three user's clusters, share same ascending resource by NOMA patterns with the user in cluster, difference are used between different clusters
Ascending resource, including：
In the cell there are one base station is set, user is divided into several clusters, each cluster includes three users
Cluster shares same ascending resource by NOMA patterns with the user in cluster, uses different ascending resources between different clusters, and be
Each cluster distributes the resource of mutually orthogonal time domain, frequency range or code word.
Preferably, step S2, each user send according to a certain preset fixed transmission power, this power be by
According to the optimal case that certain criterion are chosen, including：
To three users in each cluster, the base station requests obtain the maximum transmission power and biography of each user
The information of transmission rate thresholding, and obtain the PL of each user and average decline system by the detection statistics to the channel long period
Number.
Preferably, by the detection statistics to the channel long period obtain each user PL and average fading coefficients it
Afterwards, further include：
The base station is first user's Allotment Serial Number 1,2 and 3, wherein sequence according to the product of the PL and average fading coefficients
Number bigger this product of expression is smaller, and the fixed transmission power that corresponding user is assigned to is with regard to smaller, the hair of such m-th of user
Send power that can be expressed as Pm=P- (m-1) ρ+10log10(3)+ωPLm, wherein ω is a given constant, and P and ρ are undetermined
Coefficient, m are the arbitrary value in 1 to 3.
Preferably, the base station is first user's Allotment Serial Number 1,2 and 3 according to the product of the PL and average fading coefficients
Later, further include：
Change curve of the flat equal Transmission probability of three users with SNR and ρ is made in base station by preset formula,
In, the average interrupt probability is a kind of evaluation index of service quality, can be sent out when channel capacity is less than given rate threshold
It is raw to interrupt, then in conjunction with the maximum transmission power of each user obtained before, optimal P and ρ values are obtained, and be broadcast to use
Family.
Preferably, it is broadcast to after user, further includes：
User in each cluster completes NOMA transmission by shared resource.
Preferably, step S3, after the base station carries out interference elimination by SIC receivers to the superposed signal, decoding
Go out the information of each user, including：
The CSI of each user is calculated in base station in real time, in conjunction with known transmission power and PL parameters, be inferred to it is current these three
User receives the sequence of power, its descending is set as user A, B and C；
Base station carries out SIC decodings by dynamic sequential, first using other users signal as the information of interference decoding user A, so
The interference of known user A is eliminated when decoding user B afterwards, and the information of user C continues as distracter.
It is detailed, as shown in Fig. 2, the committed step of the present invention is as follows：
1. user grouping, user is divided into cluster by triplets, and is distributed for each cluster mutually orthogonal
The resources such as time domain, frequency range or code word；
2. three users in couple each cluster, the base station requests obtain each user maximum transmission power and
The information of transfer rate thresholding, and obtain the PL of each user and average decline system by the detection statistics to the channel long period
Number；
3. the base station is first user's Allotment Serial Number 1,2 and 3 according to the product of the PL and average fading coefficients, wherein
Bigger this product of expression of serial number is smaller, the fixed transmission power that corresponding user is assigned to regard to smaller, such m-th of user's
Transmission power can be expressed as Pm=P- (m-1) ρ+10log10(3)+ωPLm, wherein ω is a given constant, and P and ρ are to wait for
Determine coefficient, m is the arbitrary value in 1 to 3；
4. change curve of the flat equal Transmission probability of three users with SNR and ρ is made in base station by preset formula,
Wherein, the average interrupt probability is a kind of evaluation index of service quality, the meeting when channel capacity is less than given rate threshold
It interrupts, then in conjunction with the maximum transmission power of each user obtained before, obtains optimal P and ρ values, and be broadcast to
User；
5. the user in each cluster completes NOMA transmission by shared resource；
6. base station will calculate the CSI of each user in real time, in conjunction with known transmission power and PL parameters, be inferred to it is current this
Three users receive the sequence of power, its descending is set as user A, B and C；
7. base station carries out SIC decodings by dynamic sequential, the information of user A is first decoded using other users signal as interference,
Then the interference of known user A is eliminated when decoding user B, and the information of user C continues as distracter.Finally can
With the information of interference-free decoding user C.This process is as shown in Figure 3.
The embodiment of the present invention one：
Present example is mainly described in detail optimal power allocation strategy.
Optimal power allocation strategy is mainly determined by following factor：It is optimization aim, channel and noise first.Optimization
Target is to wish service quality or performance requirement that system reaches, and the modeling pattern of channel and noise determines the table of optimization aim
Up to shape.To avoid the problems such as fairness is bad between user, usually using average interrupt probability is minimum or outage probability maximum user
Effective speed it is maximum.In the case where considering the scene of rayleigh fading channel and additive white Gaussian noise, the outage probability of each user
It can be write as following form.
WhereinIndicate that the channel capacity of m-th of user is less than threshold value.
Indicate channel capacity, wherein pmIt is transmission power, hmIt is
Channel fading (including multipath fading and PL), σ indicate noise.It, can by above formula when giving each user rate thresholding
To make relational graph of the average interrupt probability such as Fig. 4 with SNR and ρ, the combination of wherein each SNR and ρ represents a kind of power
Allocation strategy, Fig. 4 is suitable for noise 0dB, the case where rate threshold 0.75.
Followed by each user's transmission power maximum value, it is assumed that it is respectivelyWithMost due to each user
Good allocation strategy can be expressed as Pm=P- (m-1) ρ+10log10(3)+ωPLm, wherein P is multiplied by average noise equal to SNR.It is right
User sends the limitation of maximum power, actually defines in Fig. 4 a series of empty made of being cut with Z axis parallel plane
Between, the point fallen in these spaces is exactly the optimal distribution strategy for the condition that meets.It is easy in practical operation using MATLAB etc.
Software solves, and then can obtain PmValue.
The embodiment of the present invention two：
This example is mainly emphasized to adjust the meaning of decoding order receiver using dynamic.
It, can be with although the complexity of design receiver can be improved using the SIC receivers of dynamic adjustment decoding order
Spectrum efficiency is improved well.The basic principle of SIC is exactly gradually to subtract the interference of maximum signal power user, SIC detectors
Data decision is carried out one by one to multiple users in receiving signal, a user is ruled out just while subtracting the subscriber signal and cause
Multi-access inference, until eliminating all multi-access inference.It will be in the folded of multiple users just because of every level-one SIC receivers
The signal of a certain specific user is detected in plus signal, we, which just will preferentially detect to be easiest to capture, receives prominent letter
Number.In addition the signal power of a certain user is bigger, more serious to the interference of other users, thus preferentially to measure so as to by its
It eliminates.It is contemplated that comparing the receiver of fixed decoding order using the receiver of dynamic adjustment, there is larger performance gain.
The average interrupt probability that comparison dynamic adjusts decoding order receiver and permanent order is shown in Fig. 5.It can see
Go out under any identical power distribution strategies, dynamic adjustment can always obtain better service quality.Specifically, fixed
The performance of sequence receiver is highly dependent upon larger ρ values as guarantee.However means that transmission power between different user
Difference can be very big, will influence the fairness between user.
In conclusion the present invention realizes that multiple access accesses using NOMA technologies by power domain, make same transfer resource by more
Multi-user utilizes, and improves the spectrum efficiency of uplink scene.Simultaneously because the SIC receivers of dynamic adjustment decoding order make
With obtaining compared to the better service quality of other uplinks NOMA.And user's transmission power allocation strategy proposed by the present invention,
Due to fully considering the service quality of channel situation and CSI poor users, between solving other allocation strategies user, fairness is not
Good problem obtains higher transmission performance gain.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, depends on the specific application and design constraint of technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
Obviously, those skilled in the art can carry out invention spirit of the various modification and variations without departing from the present invention
And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it
Interior, then the present invention is also intended to including these modification and variations.
Claims (6)
1. a kind of uplink NOMA power distribution methods based on dynamic decoder SIC receivers, which is characterized in that including：
In the cell there are one base station is set, user is divided into several clusters, each cluster includes three user's clusters, together
User in cluster shares same ascending resource by NOMA patterns, and different ascending resources are used between different clusters；
Each user sends according to a certain preset fixed transmission power, this power is chosen most according to certain criterion
Excellent scheme, including：
To three users in each cluster, the base station requests obtain the maximum transmission power and transmission speed of each user
The information of rate thresholding, and the PL of each user and average fading coefficients are obtained by the detection statistics to the channel long period, and
And the base station is first user's Allotment Serial Number 1,2 and 3 according to the product of the PL and average fading coefficients, wherein serial number is bigger
Indicate that this product is smaller, the fixed transmission power that corresponding user is assigned to is with regard to smaller, the transmission power of such m-th of user
It can be expressed as Pm=P- (m-1) ρ+10log10(3)+ωPLm, wherein ω is a given constant, and P and ρ are undetermined coefficient, m
Arbitrary value in being 1 to 3；
The base station receives the superposed signal of three users, and carries out interference to the superposed signal by SIC receivers and disappear
Remove and decode the information of each user.
2. the uplink NOMA power distribution methods based on dynamic decoder SIC receivers, feature exist as described in claim 1
In, after the base station carries out interference elimination by SIC receivers to the superposed signal, decode the information of each user, wrap
It includes：
The base station is decoded using dynamic sequential, according to instantaneous received power it is descending the superposed signal is decoded and
Interference is eliminated, and the information of three users is finally obtained.
3. the uplink NOMA power distribution methods based on dynamic decoder SIC receivers, feature exist as described in claim 1
In in the cell there are one base station is arranged, user being divided into several clusters, each cluster includes three user's clusters, same
User in cluster shares same ascending resource by NOMA patterns, and different ascending resources are used between different clusters, including：
In the cell there are one base station is set, user is divided into several clusters, each cluster includes three user's clusters, together
User in cluster shares same ascending resource by NOMA patterns, uses different ascending resources between different clusters, and be each
Cluster distributes the resource of mutually orthogonal time domain, frequency range or code word.
4. the uplink NOMA power distribution methods based on dynamic decoder SIC receivers, feature exist as described in claim 1
After, the base station is user's Allotment Serial Number 1,2 and 3 according to the product of the PL and average fading coefficients first, further include：
Base station change curve of the flat equal Transmission probability of three users with SNR and ρ is made by preset formula, wherein
The average interrupt probability is a kind of evaluation index of service quality, in occurring when channel capacity is less than given rate threshold
It is disconnected, then in conjunction with the maximum transmission power of each user obtained before, optimal P and ρ values are obtained, and be broadcast to user.
5. the uplink NOMA power distribution methods based on dynamic decoder SIC receivers, feature exist as claimed in claim 4
In being broadcast to after user, further include：
User in each cluster completes NOMA transmission by shared resource.
6. the uplink NOMA power distribution methods based on dynamic decoder SIC receivers, feature exist as claimed in claim 5
In, after the base station carries out interference elimination by SIC receivers to the superposed signal, decode the information of each user, wrap
It includes：
The CSI of each user is calculated in base station in real time, in conjunction with known transmission power and PL parameters, is inferred to these three current users
Its descending is set as user A, B and C by the sequence for receiving power；
Base station carries out SIC decodings by dynamic sequential, first using other users signal as the information of interference decoding user A, then exists
The interference of known user A is eliminated when decoding user B, and the information of user C continues as distracter.
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| CN107466097B (en) * | 2017-03-15 | 2020-08-28 | 中山大学 | Power distribution method of non-orthogonal multiple access system |
| CN107171724A (en) * | 2017-04-21 | 2017-09-15 | 东南大学 | The method of visible light communication NOMA system powers distribution based on fair principle |
| TWI656745B (en) | 2017-04-21 | 2019-04-11 | 國立清華大學 | Non-orthogonal multiple access data transmission method and transmission device |
| CN108430102A (en) * | 2018-03-08 | 2018-08-21 | 广州番禺职业技术学院 | A kind of uplink adaptive N OMA communication systems and its method |
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