CN106027130B - A kind of airspace pattern segmentation multiple access method - Google Patents
A kind of airspace pattern segmentation multiple access method Download PDFInfo
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- CN106027130B CN106027130B CN201610290491.7A CN201610290491A CN106027130B CN 106027130 B CN106027130 B CN 106027130B CN 201610290491 A CN201610290491 A CN 201610290491A CN 106027130 B CN106027130 B CN 106027130B
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- 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
- H04B7/0413—MIMO systems
- H04B7/0426—Power distribution
- H04B7/043—Power distribution using best eigenmode, e.g. beam forming or beam steering
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- 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
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Abstract
The invention discloses a kind of airspace patterns to divide multiple access method, includes the following steps: that (1) carries out power configuration to the symbol to be transmitted of user group, forms signal to be transmitted；(2) multiple domain multiplexing is carried out to the signal to be transmitted of user group, is mapped as superposed signal；(3) wave beam forming is carried out to the superposed signal of user group, and through eating dishes without rice or wine to emit.The present invention is while inheriting the excellent performance of non-orthogonal multiple access technology and large-scale antenna array technology, the equipment access capacity of system can be greatly improved, the computational load of receiving end is reduced, and realizes the dimensionality reduction of aerial array, convenient for the standardized designs eated dishes without rice or wine.
Description
Technical field
The present invention relates to a kind of airspace patterns to divide multiple access method, belongs to the multiple access access skill in mobile communication system
Art.
Background technique
With the quick increasing for the equipment total amount that the explosive growth of mobile data flow and mobile communications network connect
Long, future mobile communication system will face huge challenge in terms of system velocity and equipment access capacity.
As the crucial wireless technology of future mobile communication system, the skills such as non-orthogonal multiple access and large-scale antenna array
Art has become industry focus of attention.On the one hand, non-orthogonal multiple access technology compares conventional orthogonal multiple access by resource multiplex
Access technology can use the complexity that can be carried, be obviously improved system velocity and equipment access capacity；On the other hand, on a large scale
Antenna array scheme has great potential in terms of system velocity promotion, and non-orthogonal multiple access technology can be cooperated to realize system
The further promotion of rate.
Summary of the invention
Goal of the invention: it faces to solve future mobile communication system in terms of system velocity and equipment access capacity huge
Big challenge, the present invention propose the novel multiple access access skill of joint multiplexing power domain and Beam Domain using airspace as binding site
Art --- airspace pattern divides multiple access technique.Airspace pattern divides multiple access technique and accesses skill in succession non-orthogonal multiple
While the excellent performance of art and large-scale antenna array technology, the equipment access capacity of system can be greatly improved, reduction connects
The computational load of receiving end, and realize the dimensionality reduction of aerial array, convenient for the standardized designs eated dishes without rice or wine.
Technical solution: to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of airspace pattern segmentation multiple access method, includes the following steps:
(1) power configuration is carried out to the symbol to be transmitted of user group, forms signal to be transmitted；
(2) multiple domain multiplexing is carried out to the signal to be transmitted of user group, is mapped as superposed signal；
(3) wave beam forming is carried out to the superposed signal of user group, and through eating dishes without rice or wine to emit.
The concrete operations of the step (1) are as follows: for the symbolic vector to be transmitted of the user group containing K user
Pass through power configuration matrixProcessing, obtains signal to be transmittedPower configuration matrix P is diagonal matrix, and
[P]kk=pkFor the transimission power for being allocated to k-th of user.
The step (2), specifically comprises the following steps:
(21) by " maximizing order of diversity " and " degree of overlapping for minimizing multi-user " principle, multiple domain multiplex matrices are designed[B]nk=bnk∈ { 0,1 }, bnk=1 n-th of wave beam of expression is multiplexed by k-th of user, bnk=0 indicates n-th of wave
Beam is not multiplexed by k-th of user, and N is that system is the Beam resources quantity for eating dishes without rice or wine to provide；
(22) multiple domain multiplexing is carried out to the signal x to be transmitted of user group, is mapped as superposed signal t=Bx,[s]k=sk。
The step (3), specifically comprises the following steps:
(31) it selects target user's set: it is worst to select a channel condition from user's cluster of n-th of wave cover
The target user is labeled as n_sel by target user；This operation is successively carried out to all N number of wave beams, constitutes target user's collection
It closes；
(32) corresponding channel information is gathered based on target user and constructs composite channel matrixFor the letter of target user n_sel and base station end
Road matrix, NRFor the antenna number of user terminal configuration, NTFor the antenna number of base station end configuration；
(33) base station end constructs compound zero-forcing beamforming matrix according to zero-forcing beamforming criterion
(34) by compound zero-forcing beamforming matrix formulation component block matrix form FC=[F1, F2..., FN]；
(35) the corresponding zero-forcing beamforming vector of n-th of wave beam is calculatedIt eats dishes without rice or wine corresponding zero-forcing beamforming
Matrix F=[f1, f2..., fn..., fN]；1 N is all for elementRDimensional vector；
(36) the emission signal vector x to eat dishes without rice or wine is calculated*=Ft, and eated dishes without rice or wine to send to user group in base station end.
The utility model has the advantages that airspace pattern provided by the invention divides multiple access method, has the advantage that 1, is with airspace
Non-orthogonal multiple access technology and large-scale antenna array technology are carried out depth combination, are conducive to give full play to two kinds by basis
The potentiality of technology；2, by the mapping of resource multiplex matrix, system can realize overload, meet N≤K≤2N- 1, i.e. Overflow RateHT is λ
=K/N, therefore, equipment access capacity maximum lift is up to (2N- 1)/N times；3, same in view of the limited coverage area of wave beam
Maximum angle between the wave beam of user's multiplexing cannot be too big, that is, the scale of the resource multiplex matrix at end of eating dishes without rice or wine is smaller；Therefore, one
Aspect, receiving end are detected received computational load and will be substantially reduced, it is easier to realize；On the other hand, extensive antenna array also will
By NTAntenna dimensionality reduction is tieed up to N-dimensional wave beam.
Detailed description of the invention
Fig. 1 is application scenarios schematic diagram (N=2, K=3) of the invention；
Fig. 2 is implementation flow chart of the invention.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
A kind of airspace pattern segmentation multiple access method, includes the following steps:
Step 1: power configuration is carried out to the symbol to be transmitted of user group, forms signal to be transmitted
For the symbolic vector to be transmitted of the user group containing K userPass through power configuration matrix
Processing, obtains signal to be transmittedPower configuration matrix P is diagonal matrix, and [P]kk=pkTo be allocated to k-th of use
The transimission power at family.
Step 2: multiple domain multiplexing is carried out to the signal to be transmitted of user group, is mapped as superposed signal
(21) by " maximizing order of diversity " and " degree of overlapping for minimizing multi-user " principle, multiple domain multiplex matrices are designed[B]nk=bnk∈ { 0,1 }, bnk=1 n-th of wave beam of expression is multiplexed by k-th of user, bnk=0 indicates n-th of wave
Beam is not multiplexed by k-th of user, and N is that system is the Beam resources quantity for eating dishes without rice or wine to provide；
(22) multiple domain multiplexing is carried out to the signal x to be transmitted of user group, is mapped as superposed signal t=Bx,[s]k=sk。
Step 3: wave beam forming is carried out to the superposed signal of user group, and through eating dishes without rice or wine to emit
(31) it selects target user's set: it is worst to select a channel condition from user's cluster of n-th of wave cover
The target user is labeled as n_sel by target user；This operation is successively carried out to all N number of wave beams, constitutes target user's collection
It closes；
(32) corresponding channel information is gathered based on target user and constructs composite channel matrixFor the letter of target user n_sel and base station end
Road matrix, NRFor the antenna number of user terminal configuration, NTFor the antenna number of base station end configuration；
(33) base station end constructs compound zero-forcing beamforming matrix according to zero-forcing beamforming criterion
(34) by compound zero-forcing beamforming matrix formulation component block matrix form FC=[F1, F2..., FN]；
(35) the corresponding zero-forcing beamforming vector of n-th of wave beam is calculatedIt eats dishes without rice or wine corresponding zero-forcing beamforming
Matrix F=[f1, f2..., fn..., fN]；1 N is all for elementRDimensional vector；
(36) the emission signal vector x to eat dishes without rice or wine is calculated*=Ft, and eated dishes without rice or wine to send to user group in base station end.
Corresponding above-mentioned airspace pattern segmentation multiple access method designs a kind of connecing for airspace pattern segmentation multiple access technique
Receipts machine design method, comprising the following steps:
Step 1: carrying out pattern detection to signal is received, and determines that receiving signal is that Beam Domain combines multiplexing with power domain
When pattern, signal will be received and be transported to composite received machine.
Step 2: quantifying to signal is received, and inhibits inter-beam interference by spatial filter, obtains invariant signal；
Specifically comprise the following steps:
(21) confirm the received signal vector of k-th of userIt will be by the received signal vector of wireless channel
It is expressed as yk=GkFt+wk,For the channel matrix between k-th of user and base station end,For force zero wave
Beam figuration matrix, F=[f1, f2..., fn..., fN],For the wave beam forming vector of corresponding n-th of wave beam,
For the superposed signal of transmitting terminal, For the multiple domain multiplex matrices of transmitting terminal, [B]nk=bnk∈ 0,
1 }, bnk=1 n-th of wave beam of expression is multiplexed by k-th of user, bnk=0 indicates that n-th of wave beam is not multiplexed by k-th of user,For power configuration matrix, [P]nk=pnkFor transmission power of k-th of user on n-th of wave beam,For with
The echo signal vector of family group, [s]k=skFor the echo signal of i-th of user, symbol.Indicate Hadamard product, wkFor kth
The additive white Gaussian noise that a user is subject to meets(indicate wkObedience mean value is 0, variance matrix isMultiple Gauss distribution),Indicate multiple Gauss distribution,For noise variance,1 N is all for elementRDimensional vector；
K is the total number of users in user group, and N is total numbers of beams of user group multiplexing, NRFor the antenna number of user terminal configuration, NTFor base station
Hold the antenna number of configuration；
(22) the spatial filter matrix V of k-th of user is calculated based on minimum mean square error criterionk；
(23) airspace filter processing is carried out to k-th of user, obtains invariant signal of k-th of user on n-th of wave beam For VkThe column vector of middle kth column.
Step 3: being normalized invariant signal, so that multi-input multi-ouput channel dimensionality reduction is defeated to single input list
Channel out, concrete operations are as follows: to invariant signal znkIn inter-beam interference, interfere in wave beam and the general power of noise carries out normalizing
Change, obtains normalized invariant signalhnkIndicate k-th of user on n-th of wave beam etc.
Effect normalization channel gain, qnkThe sum of interference and noise in inter-beam interference, wave beam after indicating normalization.
Step 4: it to the invariant signal after normalization, is removed in wave beam and is interfered by sequence interference eliminator, obtain target
Signal；Specifically comprise the following steps:
(41) according to size to the equivalent normalization channel gain h of all usersnkAscending order arrangement is carried out, after rearrangement,
The position of k-th of user in the sequence is denoted as k*；
(42) to n-th of wave beam, successively the invariant signal after all users normalization is carried out according to rearrangement sequence
Decoding.
Step 5: the Signal to Interference plus Noise Ratio of echo signal, after rearrangement, kth are calculated*Letter of a user on n-th of wave beam
It is dry to make an uproar than indicating are as follows:
Wherein:For kth*Signal to Interference plus Noise Ratio of a user on n-th of wave beam.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (1)
1. a kind of airspace pattern divides multiple access method, characterized by the following steps:
(1) power configuration is carried out to the symbol to be transmitted of user group, forms signal to be transmitted；Concrete operations are as follows: for containing K use
The symbolic vector to be transmitted of the user group at familyPass through power configuration matrixProcessing, obtains signal to be transmittedPower configuration matrix P is diagonal matrix, and [P]kk=pkFor the transimission power for being allocated to k-th of user；
(2) multiple domain multiplexing is carried out to the signal to be transmitted of user group, is mapped as superposed signal；Specifically comprise the following steps:
(21) multiple domain multiplex matrices are designed[B]nk=bnk∈ { 0,1 }, bnk=1 indicates that n-th of wave beam is used by k-th
Family multiplexing, bnk=0 indicates that n-th of wave beam is not multiplexed by k-th of user, and N is that system is the Beam resources quantity for eating dishes without rice or wine to provide；
(22) multiple domain multiplexing is carried out to the signal x to be transmitted of user group, is mapped as superposed signal t=Bx,[s]k=skFor the symbol to be transmitted of k-th of user；
(3) wave beam forming is carried out to the superposed signal of user group, and through eating dishes without rice or wine to emit；Specifically comprise the following steps:
(31) it selects target user's set: selecting the worst target of channel condition from user's cluster of n-th of wave cover
The target user is labeled as n_sel by user；This operation is successively carried out to all N number of wave beams, constitutes target user's set；
(32) corresponding channel information is gathered based on target user and constructs composite channel matrixFor the letter of target user n_sel and base station end
Road matrix, NRFor the antenna number of user terminal configuration, NTFor the antenna number of base station end configuration；
(33) base station end constructs compound zero-forcing beamforming matrix according to zero-forcing beamforming criterion
(34) by compound zero-forcing beamforming matrix formulation component block matrix form FC=[F1,F2,…,FN]；
(35) the corresponding zero-forcing beamforming vector of n-th of wave beam is calculatedIt eats dishes without rice or wine corresponding zero-forcing beamforming matrix
F=[f1,f2,…,fn,…,fN]；1 N is all for elementRDimensional vector；
(36) the emission signal vector x to eat dishes without rice or wine is calculated*=Ft, and eated dishes without rice or wine to send to user group in base station end.
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| CN105263151A (en) * | 2014-07-15 | 2016-01-20 | 电信科学技术研究院 | Signal detection method and equipment |
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| CN105263151A (en) * | 2014-07-15 | 2016-01-20 | 电信科学技术研究院 | Signal detection method and equipment |
Non-Patent Citations (2)
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| "Pattern Division Multiple Access (PDMA) for Cellular Future Radio Access";Jie Zeng,Bing Li,Xin Su,Liping Rong,Rongrong Xing;《IEEE》;20151017;全文 * |
| "面向5G的PDMA图样分割多址接入技术";康邵莉，戴晓明，任斌;《中国优秀硕士论文全文数据库》;20151115(第5期);全文 * |
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