CN109347530A - Face sky array communications non-orthogonal multiple access ascending transmission method - Google Patents

Face sky array communications non-orthogonal multiple access ascending transmission method Download PDF

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Publication number
CN109347530A
CN109347530A CN201811231439.XA CN201811231439A CN109347530A CN 109347530 A CN109347530 A CN 109347530A CN 201811231439 A CN201811231439 A CN 201811231439A CN 109347530 A CN109347530 A CN 109347530A
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base station
null
facing
follows
signal
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肖振宇
曹先彬
罗喜伶
刘凯
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Beihang University
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Beihang University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/391—Modelling the propagation channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses sky array communications non-orthogonal multiple access ascending transmission method is faced, belongs to and face sky field of communication technology.It constructs communication scenes first, ground base station and each faces between null base station progress millimeter wave beam communication, obtain channel response vector；Select the channel response vector faced on the most strong path of null base station as ground base station and the efficient channel response vector h for facing null base station ii；Efficient channel gain using wave beam forming vector w to null base station is respectively facedSequence is made, is ordered as efficient channel gainGround base station will emit signal s1It preferentially decodes and eliminates, further decoding emits signal s2, obtain the reachable rate of each space base；When reaching maximization up to the sum of rate, combined optimization power control is designed and constraint condition that wave beam forming need to meet.Constraint condition is solved, the beamforming scheme of null base station corresponding power distribution and ground base station is respectively faced.The present invention effectively increases spectrum efficiency, and computation complexity is low, realizes fast beam figuration and power control.

Description

Face sky array communications non-orthogonal multiple access ascending transmission method
Technical field
The invention belongs to face sky field of communication technology, specifically a kind of sky array communications non-orthogonal multiple access uplink of facing is passed Transmission method.
Background technique
In recent years, the application and development of facing empty communication cause the concern of countries in the world.Facing empty communication includes near space Communication and low latitude communication.In the high-altitude of 20km-100km, use dirigible or large-scale unmanned plane as facing null base station, it is below in 20km Low latitude uses unmanned plane as null base station is faced, and realizes the connection of ground base station and remote user.It carries out facing sky using sky aircraft is faced Communication, effectively can supplement and improve existing communication system, have good mobility and stability due to facing sky aircraft, Face the communication overlay and the quickly emergency communication of reply emergency situations that empty communication can be realized remote districts.
With the growth of number of users and communication requirement, needs to put into more dirigibles and null base station is faced in unmanned plane foundation Ensure the stability of communication, this just needs ground base station and face null base station to establish stable communication link.However, with number of users The rapid growth of amount, under traditional orthogonal access mode, as soon as the single radio frequency of base station can only connect a user, this is limited The access quantity of user, leads to not meet communication requirement.
And non-orthogonal multiple access (Non Orthogonal Multiple Access, NOMA) accesses not with orthogonal multiple access Together, base station can access multiple users on same time domain/frequency domain/code domain resource block, be distinguish in power domain to them. Ground base station faces null base station by the way that the connection of non-orthogonal multiple access way is multiple, faces null base station with non-orthogonal multiple access way company Multiple terrestrial users are connect, accessing user's quantity can be significantly improved.
In facing empty communication, traditional frequency spectrum resource is extremely limited, and available microwave frequency band has been unable to satisfy communication requirement. Millimeter wave (30-300GHz) has bandwidth abundant, is considered as a key technology of the following star base communication.Due to millimeter wave compared with Strong range attenuation characteristic generallys use array antenna to improve the power for receiving signal.And millimetre-sized wavelength flying Large scale array antenna is carried on row device to be possibly realized.
Using millimeter wave array antenna non-orthogonal multiple cut-in method in facing empty communication, it can increase and face null base station and use The access quantity at family simultaneously improves frequency spectrum resource utilization rate, this related to how to carry out facing between null base station joint Power control and The wave beam forming problem of ground base station.
Summary of the invention
The present invention is set using optimization method in view of the above-mentioned problems, face in sky non-orthogonal multiple access communications system in uplink The power control and wave beam forming of up-link are counted, transmitting terminal aims at 2 directions by design wave beam forming vector simultaneously, together When receiving end control different capacity transmitting signal, to realize the purpose maximized up to the sum of rate；It is specifically a kind of to face sky Array communications non-orthogonal multiple accesses ascending transmission method.
Specific step is as follows:
Step 1: facing sky non-orthogonal multiple access communications system for uplink, constructing ground base station and facing between null base station Communication scenes model.
Communication scenes include: 1. ground base stations to multiple uplink for facing null base station；2. facing null base station to multiple ground The uplink of user；3. the uplink that ground base station services multiple low latitude unmanned planes.
For the first ground base station to the scene of multiple uplink for facing null base station, specific building is as follows:
Ground base station has N member aerial array, and 2 single antenna are connected in same time domain/frequency domain/code domain resource block and are remotely faced Null base station, it is respectively space base 1 and space base 2 that two, which are faced null base station,.In ground base station one end, every antenna branch has a phase to turn Parallel operation and power amplifier, all power amplifiers have identical scale factor, therefore wave beam forming vector, i.e. antenna power system The mould length of each component of number vector is equal, referred to as permanent modular constraint.
Step 2: being directed to the first model of place, ground base station uses the uniform linear array antenna of half-wave spacing, and every It is a to face progress millimeter wave beam communication between null base station, obtain and respectively face the channel response vector of null base station；
Ground base station and the channel response vector h for facing null base station iiFormula are as follows:
Wherein, i=1,2；λi,lIndicate the complex coefficient for facing the l articles diameter of null base station i, LiIndicate the multipath point for facing null base station i Measure total number, Ωi,lIndicate that cosine value of the l articles diameter in ground base station acceptance angle for facing null base station i, a () indicate to be directed toward vector Function, expression formula is
A (N, Ω)=[ejπ0Ω,ejπ1Ω,ejπ2Ω,…,ejπ(N-1)Ω]
A (N, Ω) depends on the geometry of array antenna；
Step 3: selecting the channel response vector on most strong path as ground base station for each path for facing null base station i With the efficient channel response vector h for facing null base station ii；
hi=λia(N,Ωi)
Wherein λiIndicate the complex coefficient for facing the most strong path of null base station i, i.e., | λi|≥|λi,l|。
Step 4: using the wave beam forming vector w under permanent modular constraint, the efficient channel gain to null base station is respectively faced Corresponding sequence is made, the decoding priority orders of each space base signal are obtained.
The permanent modular constraint of wave beam forming vector w is that each component mould length is equal
Efficient channel gain depends on channel gain and array gain, for efficient channel gainIt is empty The signal that priority when the signal decoding of base 1 is higher than space base 2 decodes priority；
For efficient channel gainPriority when the signal decoding of space base 2 is higher than the signal of space base 1 Decode priority；
Step 5: ground base station receives two superposed signals for facing null base station while transmitting；
Signal is as follows
siThe transmitting signal that null base station i is sent to ground base station, p are faced in expressioniFor the transmitting signal power for facing null base station i.n Indicate the white Gaussian noise on ground base station antenna, mean power is denoted as σ2。
Step 6: being ordered as efficient channel gainGround base station will emit signal s1Preferential solution Code simultaneously eliminates in the signal y of superposition, and further decoding emits signal s2, obtain the reachable rate of each space base；
Signal s will be emitted using serial interference elimination method1It is eliminated from the signal y of superposition；
The reachable rate of two space bases is calculated separately using shannon formula, as follows:
The reachable rate R of space base 11Are as follows:
The reachable rate R of space base 22Are as follows:
Step 7: when all the sum of reachable rates for facing null base station reach maximization, design combined optimization power control and The constraint condition that wave beam forming need to meet.
Reach maximization i.e. objective function up to the sum of rate, as follows:
The constraint condition that need to meet is as follows:
0≤p1≤P
0≤p2≤P
Wherein riIndicate the minimum reachable rate constraint for facing null base station i.P is the maximum power for facing the transmitting signal of null base station.
Step 8: solving to the constraint condition that need to meet, respectively faced the corresponding power distribution of null base station and ground base station Beamforming scheme, obtain good performance.
Specific step is as follows:
First, by maximized each the sum of reachable rate for facing null base station, power control and beam gain distribution are split as Subproblem and wave beam forming two sub-problems, and introduce intermediate variableIt is converted.
Under ideal wave beam forming, beam gain meets:
Power control and beam gain distribution subproblem statement as a result, are as follows:
Reach maximization up to the sum of rate are as follows:
The condition that need to meet is as follows:
0≤p1≤P
0≤p2≤P
The statement of wave beam forming subproblem are as follows:
Wherein,C in subproblem is distributed for power control and beam gain2Most Excellent solution；
Then, to after conversion power control and beam gain distribution subproblem solve；
Optimal power control is exactly two spaces base station all with maximum power transmission signal, i.e.,
Beam gain optimal scheme solution are as follows:
Simultaneously, the wave beam forming subproblem after conversion is solved with the convex optimization tool of standard；
By in wave beam forming subproblemOptimum angle scan for, obtain series of standards it is convex optimization ask Topic:
Wherein Re () indicates that real, M are phase search total number, m=1,2..., M.
Take optimal solution w of the maximum solution of target function value as optimization problem*, utilize w*Each antenna weight is set, thus Realize wave beam forming.
The present invention has the advantages that
1), one kind faces sky array communications non-orthogonal multiple access ascending transmission method, can double up and face empty communication In face null base station/terrestrial user access quantity；
2), one kind faces sky array communications non-orthogonal multiple access ascending transmission method, and wave beam forming is designed in joint receiving end With transmitting terminal power control, spectrum efficiency can be effectively improved, that is, is maximized up to the sum of rate；
3), one kind faces sky array communications non-orthogonal multiple access ascending transmission method, has lower computation complexity, energy Enough realize fast beam figuration and power control.
Detailed description of the invention
Fig. 1 is model of place schematic diagram of the ground base station of the present invention to multiple uplink for facing null base station；
Fig. 2 is the structural schematic diagram of uplink phased-array antenna in the present invention；
Fig. 3 is a kind of flow chart for facing sky array communications non-orthogonal multiple access ascending transmission method of the present invention.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
One kind of the present invention faces sky array communications non-orthogonal multiple access ascending transmission method, is that one kind is faced in uplink millimeter wave In empty communication system, using non-orthogonal multiple access way, the method for co-design power distribution and analog beam figuration；With ground For face base station is to null base station uplink is faced, sequence is made into the efficient channel gain of each air base station, channel gain is got over Height, priority is higher, corresponding transmitting signal is sent to ground base station on same resource block, ground base station is using string Row interference is eliminated (SIC) method and is decoded, and the high space base signal priority of power is decoded and excellent in the mixed signal received It first eliminates, then successively decodes remaining space base signal according to watt level, until all space base signals are all successfully decoded.
The present invention not only increases the quantity of access space base by non-orthogonal multiple access way, and improves frequency spectrum Utilization rate, especially when each channel gain difference is obvious, this income can be higher.Uplink non-orthogonal multiple of the present invention connects Enter mode and is equally applicable to scene and the multiple low latitude unmanned planes of ground base station service that air base station services multiple terrestrial users Scene.
As shown in Figure 3, the specific steps are as follows:
Step 1: facing sky non-orthogonal multiple access communications system for uplink, constructing ground base station and facing between null base station Communication scenes model.
Communication scenes include: 1. ground base stations to multiple uplink for facing null base station；2. facing null base station to multiple ground The uplink of user；3. the uplink that ground base station services multiple low latitude unmanned planes.
For the first ground base station to the scene of multiple uplink for facing null base station, as shown in Figure 1, specific building is such as Under:
Ground base station has N member aerial array, and 2 single antenna are connected in same time domain/frequency domain/code domain resource block and are remotely faced Null base station, it is respectively space base 1 and space base 2 that two, which are faced null base station,.As shown in Fig. 2, every antenna branch has in ground base station one end One phase converter (Phase Shifter) and power amplifier (Power Amplifier, PA), all power amplifications Device has identical scale factor, therefore a wave beam forming vector, i.e., antenna weight coefficient vector (Antenna Weight Vector, AWV) the mould length of each component is equal, referred to as permanent modular constraint (Constant-modulus, CM).
Step 2: being directed to the first model of place, ground base station uses the uniform linear array antenna of half-wave spacing, and every It is a to face progress millimeter wave beam communication between null base station, obtain and respectively face the channel response vector of null base station；
Ground base station and the channel faced between null base station i are millimeter wave channel, using the uniform linear array of half-wave spacing Antenna carries out millimeter wave beam communication, channel response vector hiFormula are as follows:
Wherein, i=1,2；λi,lIndicate the complex coefficient for facing the l articles diameter of null base station i, LiIndicate the multipath point for facing null base station i Measure total number, Ωi,lIndicate that the cosine value for facing the angle of departure of the l articles diameter of null base station i, i.e. cos (AoD), a () indicate to be directed toward The function of vector, expression formula are
A (N, Ω)=[ejπ0Ω,ejπ1Ω,ejπ2Ω,…,ejπ(N-1)Ω]
A (N, Ω) depends on the geometry of array antenna；Use θi,lIndicate the acceptance angle for facing the l articles diameter of null base station i Value, and Ωi,l=cos (θi,l)。
Step 3: selecting the channel response vector on most strong path as ground base station for each path for facing null base station i With the efficient channel response vector h for facing null base station ii；
hi=λia(N,Ωi)
Wherein λiIndicate the complex coefficient for facing the most strong path of null base station i, i.e., | λi|≥|λi,l|。
Step 4: using the wave beam forming vector w under permanent modular constraint, the efficient channel gain to null base station is respectively faced Corresponding sequence is made, the decoding priority orders of each space base signal are obtained.
The permanent modular constraint of wave beam forming vector w is that each component mould length is equalDo not having In the case where determining wave beam forming vector w, it can not determine that efficient channel gain is sorted, efficient channel gain depends on channel gain And array gain.
For | λ1| > | λ2|, efficient channel gainThat is the channel gain of space base 1 is stronger, according to upper Row non-orthogonal multiple accesses the criterion of (NOMA), and the signal decoding that the priority when signal of space base 1 decodes is higher than space base 2 is preferential Grade；2 signal of space base eliminates rear decodable code in 1 signal of space base.
Similarly, for efficient channel gainPriority when the signal decoding of space base 2 is higher than space base 1 Signal decode priority；
Step 5: ground base station receives two superposed signals for facing null base station while transmitting；
The power normalization transmitting signal that space base i (i=1,2) is sent to ground base station is si, wherein the phase of each signal It hopesSignal siTransmission power be pi.In the space base NOMA of uplink, ground base station receives superposition space base signal Are as follows:
N indicates the white Gaussian noise on ground base station antenna, and mean power is denoted as σ2。
Step 6: being ordered as efficient channel gainGround base station will emit signal s1Preferential solution Code simultaneously eliminates in the signal y of superposition, and further decoding emits signal s2, obtain the reachable rate of each space base；
Signal s will be emitted using serial interference elimination method1It is eliminated from the signal y of superposition；
The reachable rate of two space bases is calculated separately using shannon formula, as follows:
The reachable rate R of space base 11Are as follows:
The reachable rate R of space base 22Are as follows:
Step 7: when all the sum of reachable rates for facing null base station reach maximization, design combined optimization power control and The constraint condition that wave beam forming need to meet.
Reach maximization i.e. objective function up to the sum of rate, as follows:
To obtain reasonable power control and beam form-endowing method, the constraint condition that need to meet is as follows:
0≤p1≤P
0≤p2≤P
Wherein riIndicate the minimum reachable rate constraint for facing null base station i；P is the maximum power for facing the transmitting signal of null base station.
Step 8: solving to the constraint condition that need to meet, respectively faced the corresponding power distribution of null base station and ground base station Beamforming scheme, obtain good performance.
Specific step is as follows:
First, by maximized each the sum of reachable rate for facing null base station, power control and beam gain distribution are split as Subproblem and wave beam forming two sub-problems, and introduce intermediate variableIt is converted.
Under ideal wave beam forming, beam gain meets:
Power control and beam gain distribution subproblem statement as a result, are as follows:
Reach maximization up to the sum of rate are as follows:
The condition that need to meet is as follows:
0≤p1≤P
0≤p2≤P
The statement of wave beam forming subproblem are as follows:
Wherein,C in subproblem is distributed for power control and beam gain2Most Excellent solution；
Then, to after conversion power control and beam gain distribution subproblem solve；
According to space base up to rate expression formula, it is found that objective function and space base 1 up to rate are p1Increasing function, and objective function It up to rate is p with space base 22Increasing function, and due to beam gain distribution flexibility, always one of space base can be made reachable Rate increases and another space base is constant up to rate, then optimal power control is exactly that two space bases are all believed with maximum power transmission Number, it may be assumed that
The above problem becomes beam gain distribution subproblem as a result, is found by derivation, space base 1 is c up to rate2Subtract Function, space base 2 are c up to rate2Increasing function, and two space bases are c up to the sum of rate2Subtraction function, therefore the problem take it is optimal Necessarily there is R when solution2=r2, i.e. space base 2 removes boundary up to rate, at this time optimal solution are as follows:
Simultaneously, the wave beam forming subproblem after conversion is solved with the convex optimization tool of standard；
DefinitionFirstly, wave beam forming vector w integrally carries out phase rotation, taking for beam gain is not interfered with Value, if w is optimal solution,It is also optimal solution, whereinRepresent the amount of phase rotation, value range be [0,2 π).It does not lose general Property, it is suitable that the present invention first passes through phase rotation selectionSo thatIt is real number, searches on this basisOptimal side To the above problem can convert are as follows:
Wherein Re () indicates that real, M are the total number for searching for phase, m=1,2..., M.Correspondence is searched each time Rope, M is bigger, and search precision is higher, and obtained solution is more accurate.This M problem can be solved with the convex optimization tool of standard, be taken Allow target function valueOptimal solution w of the maximum solution as optimization problem*, utilize w*Each antenna weight is set, thus Realize wave beam forming.

Claims (3)

1. facing sky array communications non-orthogonal multiple access ascending transmission method, which is characterized in that specific step is as follows:
Step 1: facing sky non-orthogonal multiple access communications system for uplink, constructing ground base station and facing and is between null base station logical Believe model of place；
Communication scenes include: 1. ground base stations to multiple uplink for facing null base station；2. facing null base station to multiple terrestrial users Uplink；3. the uplink that ground base station services multiple low latitude unmanned planes；
Step 2: being directed to the first model of place, ground base station uses the uniform linear array antenna of half-wave spacing, and each faces Millimeter wave beam communication is carried out between null base station, obtains and respectively face the channel response vector of null base station；
Ground base station and the channel response vector h for facing null base station iiFormula are as follows:
Wherein, i=1,2；λi,lIndicate the complex coefficient for facing the l articles diameter of null base station i, LiIndicate that the multipath component for facing null base station i is total Number, Ωi,lIndicate that cosine value of the l articles diameter in ground base station acceptance angle for facing null base station i, a () indicate the letter for being directed toward vector Number, expression formula are
A (N, Ω)=[ejπ0Ω,ejπ1Ω,ejπ2Ω,…,ejπ(N-1)Ω]
A (N, Ω) depends on the geometry of array antenna；
Step 3: for each path of null base station i is faced, select channel response vector on most strong path as ground base station with face The efficient channel response vector h of null base station ii；
hi=λia(N,Ωi)
Wherein λiIndicate the complex coefficient for facing the most strong path of null base station i, i.e., | λi|≥|λi,l|；
Step 4: using the wave beam forming vector w under permanent modular constraint, the efficient channel gain to null base station is respectively facedIt makes Corresponding sequence, obtains the decoding priority orders of each space base signal；
The permanent modular constraint of wave beam forming vector w is that each component mould length is equal
Efficient channel gain depends on channel gain and array gain, for efficient channel gainSpace base 1 The signal that priority when signal decodes is higher than space base 2 decodes priority；
For efficient channel gainThe signal that priority when the signal decoding of space base 2 is higher than space base 1 decodes Priority；
Step 5: ground base station receives two superposed signals for facing null base station while transmitting；
Signal is as follows
siThe transmitting signal that null base station i is sent to ground base station, p are faced in expressioniFor the transmitting signal power for facing null base station i；N is indicated White Gaussian noise on ground base station antenna, mean power are denoted as σ2；
Step 6: being ordered as efficient channel gainGround base station will emit signal s1Preferential decoding is simultaneously It is eliminated in the signal y of superposition, further decoding emits signal s2, obtain the reachable rate of each space base；
Signal s will be emitted using serial interference elimination method1It is eliminated from the signal y of superposition；
The reachable rate of two space bases is calculated separately using shannon formula, as follows:
The reachable rate R of space base 11Are as follows:
The reachable rate R of space base 22Are as follows:
Step 7: designing combined optimization power control and wave beam when all the sum of reachable rates for facing null base station reach maximization The constraint condition that figuration need to meet；
Reach maximization i.e. objective function up to the sum of rate, as follows:
The constraint condition that need to meet is as follows:
0≤p1≤P
0≤p2≤P
Wherein riIndicate the minimum reachable rate constraint for facing null base station i.P is the maximum power for facing the transmitting signal of null base station；
Step 8: solving to the constraint condition that need to meet, respectively faced the wave of null base station corresponding power distribution and ground base station Beam figuration scheme, obtains good performance.
2. facing sky array communications non-orthogonal multiple access ascending transmission method as described in claim 1, which is characterized in that described The step of one in ground base station to the scenes of multiple uplink for facing null base station, specific building is as follows:
Ground base station has N member aerial array, and 2 single antenna are connected in same time domain/frequency domain/code domain resource block and remotely face space base It stands, it is respectively space base 1 and space base 2 that two, which are faced null base station,；In ground base station one end, every antenna branch has a phase converter And power amplifier, all power amplifiers have identical scale factor, therefore a wave beam forming vector, i.e., antenna weight coefficient to The mould length for measuring each component is equal, referred to as permanent modular constraint.
3. facing sky array communications non-orthogonal multiple access ascending transmission method as described in claim 1, which is characterized in that described The step of eight specific step is as follows:
First, it by maximized each the sum of reachable rate for facing null base station, is split as power control and beam gain distribution is asked Topic and wave beam forming two sub-problems, and introduce intermediate variableIt is converted；
Under ideal wave beam forming, beam gain meets:
Power control and beam gain distribution subproblem statement as a result, are as follows:
Reach maximization up to the sum of rate are as follows:
The condition that need to meet is as follows:
0≤p1≤P
0≤p2≤P
The statement of wave beam forming subproblem are as follows:
Wherein, C in subproblem is distributed for power control and beam gain2Optimal solution；
Then, to after conversion power control and beam gain distribution subproblem solve；
Optimal power control is exactly two spaces base station all with maximum power transmission signal, i.e.,
Beam gain optimal scheme solution are as follows:
Simultaneously, the wave beam forming subproblem after conversion is solved with the convex optimization tool of standard；
By in wave beam forming subproblemOptimum angle scan for, obtain the convex optimization problem of series of standards:
Wherein Re () indicates that real, M are phase search total number, m=1,2..., M；
Take optimal solution w of the maximum solution of target function value as optimization problem*, utilize w*Each antenna weight is set, to realize Wave beam forming.
CN201811231439.XA 2018-10-22 2018-10-22 Face sky array communications non-orthogonal multiple access ascending transmission method Pending CN109347530A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109962727A (en) * 2019-03-27 2019-07-02 北京航空航天大学 Face empty communication mixed-beam figuration and non-orthogonal multiple access transmission method
CN111010223A (en) * 2019-12-17 2020-04-14 北京航空航天大学 Millimeter wave full-duplex unmanned aerial vehicle communication relay transmission method
CN113301532A (en) * 2021-05-26 2021-08-24 中南大学 Channel allocation method for unmanned aerial vehicle-assisted millimeter wave emergency communication network
CN114499808A (en) * 2022-01-25 2022-05-13 西安邮电大学 Hybrid non-orthogonal multiple access method of space-power-code domain

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140314006A1 (en) * 2013-04-19 2014-10-23 Samsung Electronics Co., Ltd. Method and apparatus for operating a non-orthogonal multiple access scheme in multiuser beamforming system
CN106487428A (en) * 2016-09-29 2017-03-08 西安电子科技大学 A kind of method of the optimization wave beam forming based on non-orthogonal multiple technology
CN107197466A (en) * 2017-06-22 2017-09-22 清华大学 Air-ground coordination communication means and device based on non-orthogonal multiple
CN108650006A (en) * 2018-05-21 2018-10-12 北京交通大学 Non-orthogonal multiple cut-in method based on extensive MIMO

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140314006A1 (en) * 2013-04-19 2014-10-23 Samsung Electronics Co., Ltd. Method and apparatus for operating a non-orthogonal multiple access scheme in multiuser beamforming system
CN106487428A (en) * 2016-09-29 2017-03-08 西安电子科技大学 A kind of method of the optimization wave beam forming based on non-orthogonal multiple technology
CN107197466A (en) * 2017-06-22 2017-09-22 清华大学 Air-ground coordination communication means and device based on non-orthogonal multiple
CN108650006A (en) * 2018-05-21 2018-10-12 北京交通大学 Non-orthogonal multiple cut-in method based on extensive MIMO

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109962727A (en) * 2019-03-27 2019-07-02 北京航空航天大学 Face empty communication mixed-beam figuration and non-orthogonal multiple access transmission method
CN111010223A (en) * 2019-12-17 2020-04-14 北京航空航天大学 Millimeter wave full-duplex unmanned aerial vehicle communication relay transmission method
WO2021120425A1 (en) * 2019-12-17 2021-06-24 北京航空航天大学 Millimeter wave full-duplex unmanned aerial vehicle communication relay transmission method
CN113301532A (en) * 2021-05-26 2021-08-24 中南大学 Channel allocation method for unmanned aerial vehicle-assisted millimeter wave emergency communication network
CN114499808A (en) * 2022-01-25 2022-05-13 西安邮电大学 Hybrid non-orthogonal multiple access method of space-power-code domain
CN114499808B (en) * 2022-01-25 2024-02-06 西安邮电大学 Hybrid non-orthogonal multiple access method of space-power-code domain

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Application publication date: 20190215