CN105763300B - A kind of receiver design method of spatial domain pattern segmentation multiple access technique - Google Patents
A kind of receiver design method of spatial domain pattern segmentation multiple access technique Download PDFInfo
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- CN105763300B CN105763300B CN201610290476.2A CN201610290476A CN105763300B CN 105763300 B CN105763300 B CN 105763300B CN 201610290476 A CN201610290476 A CN 201610290476A CN 105763300 B CN105763300 B CN 105763300B
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7105—Joint detection techniques, e.g. linear detectors
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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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03305—Joint sequence estimation and interference removal
Abstract
The invention discloses the receiver design methods that a kind of spatial domain pattern divides multiple access technique, include the following steps：(1) the docking collection of letters number carries out a pattern detection, when determining that it is that Beam Domain combines the pattern being multiplexed with power domain to receive signal, will receive signal and is transported to composite received machine；(2) the docking collection of letters number is quantified, and is inhibited inter-beam interference by spatial filter, is obtained invariant signal；(3) invariant signal is normalized so that multi-input multi-ouput channel dimensionality reduction to single-input single-output channel；(4) it to the invariant signal after normalization, is removed in wave beam and is interfered by sequence interference eliminator, obtain echo signal；(5) Signal to Interference plus Noise Ratio of echo signal is calculated.Composite received machine design method proposed by the present invention makes full use of the space-domain multiplexing characteristic of spatial domain pattern segmentation multiple access technique, can dock the collection of letters number and correctly be detected, and have lower complexity.
Description
Technical field
The present invention relates to the receiver design methods that a kind of spatial domain pattern divides multiple access technique, belong to mobile communication system
Multiple access technique in system.
Background technology
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.Novel orthogonal multiple access connects
Enter key technology one of of the technology as future mobile communication system, it has also become industry focus of attention.
Spatial domain pattern divides multiple access technique, and the multiple domain multiplexing of resource is realized based on Beam Domain, will be nonopiate more
Location access technology and large-scale antenna array technology are combined, and conspicuousness is brought in terms of system velocity and equipment access capacity
It can gain.
However, the multiple domain superposed signal of spatial domain pattern segmentation multiple access technique, brings to the detection technique of receiving terminal
Huge challenge.On the one hand, receiving signal, not only superposition forms inter-beam interference on Beam Domain, and shape is also superimposed on power domain
At being interfered in wave beam, therefore, single multiuser detection is difficult to effectively handle these interference.On the other hand, at present
Non-linear detection mode is mostly used in the receiver design aspect of non-orthogonal multiple access technology, and non-linear detection mode has
Higher complexity designs connecing for low complex degree therefore, it is necessary to fully consider the characteristics of spatial domain pattern divides multiple access technique
Receipts machine method.
Invention content
Goal of the invention：The receiver for dividing multiple access technique in order to solve spatial domain pattern is designed in complex jamming and complexity
The huge challenge that faces in terms of degree requirement, the present invention divide the spatial domain basis of multiple access technique as point of penetration using spatial domain pattern,
Propose the composite received machine design method of joint spatial filter and sequence interference eliminator.Composite received proposed by the present invention
Machine design method makes full use of the space-domain multiplexing characteristic of spatial domain pattern segmentation multiple access technique, can dock the collection of letters number and carry out just
True detection, and have lower complexity.
Technical solution：To achieve the above object, the technical solution adopted by the present invention is：
A kind of receiver design method of spatial domain pattern segmentation multiple access technique, includes the following steps：
(1) the docking collection of letters number carries out a pattern detection, determines that it is that Beam Domain combines the pattern being multiplexed with power domain to receive signal
When, signal will be received and be transported to composite received machine；
(2) the docking collection of letters number is quantified, and is inhibited inter-beam interference by spatial filter, is obtained invariant signal；
(3) invariant signal is normalized so that multi-input multi-ouput channel dimensionality reduction to single-input single-output is believed
Road：
(4) it to the invariant signal after normalization, is removed in wave beam and is interfered by sequence interference eliminator, obtain target letter
Number；
(5) Signal to Interference plus Noise Ratio of echo signal is calculated.
The step (2), specifically comprises 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],Wave beam forming for corresponding n-th of wave beam is vectorial,
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 o indicates Hadamard products, 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
For the total number of users in user group, N is total numbers of beams of user group multiplexing, NRFor the antenna number of user terminal configuration, NTFor base station end
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 beamFor VkThe column vector of middle kth row.
The concrete operations of the step (3) are：To invariant signal znkIn inter-beam interference, interfere in wave beam and noise
General power is normalized, and obtains normalized invariant signalhnkIndicate that k-th of user exists
Equivalent normalization channel gain on n-th of wave beam, qnkIndicate the inter-beam interference after normalization, interfere in wave beam and noise it
With.
The step (4), specifically comprises 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, the invariant signal after being normalized successively to all users according to rearrangement sequence carries out
Decoding.
In the step (5), after rearrangement, kth*Signal to Interference plus Noise Ratio of a user on n-th of wave beam is expressed as：
Wherein：For kth*Signal to Interference plus Noise Ratio of a user on n-th of wave beam.
Advantageous effect：The receiver design method of spatial domain pattern segmentation multiple access technique provided by the invention, with spatial domain
Based Joint has used spatial filter and sequence interference eliminator；Composite received machine design method proposed by the present invention is fully sharp
The space-domain multiplexing characteristic for dividing multiple access technique with spatial domain pattern can dock the collection of letters number and correctly be detected, and have
Lower complexity.
Description of the drawings
Fig. 1 is the application scenarios schematic diagram (N=2, K=3) of the present invention；
Fig. 2 is the implementing procedure figure of the present invention.
Specific implementation mode
The present invention is further described below in conjunction with the accompanying drawings.
A kind of spatial domain 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 matrixPlace
Reason, obtains signal to be transmittedPower configuration matrix P is diagonal matrix, and [P]kk=pkTo be allocated to k-th user's
Transimission power.
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 is emitted through eating dishes without rice or wine
(31) target user's set is selected：It is worst that a channel condition is selected from user's cluster of n-th of wave cover
The target user is labeled as n_sel by target user；This operation is carried out successively to all N number of wave beams, constitutes target user's collection
It closes；
(32) it is based on target user and gathers corresponding channel information structure 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 sent to user group in base station end through eating dishes without rice or wine.
Corresponding above-mentioned spatial domain pattern segmentation multiple access method designs a kind of connecing for spatial domain pattern segmentation multiple access technique
Receipts machine design method, includes the following steps：
Step 1：A number progress pattern detection of collecting mail is docked, determines that receive signal combines multiplexing with power domain for Beam Domain
When pattern, signal will be received and be transported to composite received machine.
Step 2：The docking collection of letters number is quantified, and is inhibited inter-beam interference by spatial filter, is obtained 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],Wave beam forming for corresponding n-th of wave beam is vectorial,
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 products, wkFor kth
The additive white Gaussian noise that a user is subject to meets Indicate multiple Gauss distribution,For noise side
Difference,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, NR
For the antenna number of user terminal configuration, NTFor the antenna number of base station end 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 beamFor VkThe column vector of middle kth row.
Step 3：Invariant signal is normalized so that multi-input multi-ouput channel dimensionality reduction is defeated to single input list
Go out channel, concrete operations are：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, qnkIndicate the inter-beam interference after normalization, the sum of interference and noise in wave beam.
Step 4：To the invariant signal after normalization, is removed in wave beam and 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, the invariant signal after being normalized successively to all users according to rearrangement sequence carries out
Decoding.
Step 5：The Signal to Interference plus Noise Ratio for calculating echo signal, after rearrangement, kth*Letter of a user on n-th of wave beam
It is dry to make an uproar than being expressed as：
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 (2)
1. a kind of receiver design method of spatial domain pattern segmentation multiple access technique, it is characterised in that：Include the following steps：
(1) the docking collection of letters number carries out a pattern detection, will when determining that it is that Beam Domain combines the pattern being multiplexed with power domain to receive signal
It receives signal and is transported to composite received machine；
(2) the docking collection of letters number is quantified, and is inhibited inter-beam interference by spatial filter, is obtained invariant signal；It specifically includes
Following steps：
(21) confirm the received signal vector of k-th of userIt will be indicated by the received signal vector of wireless channel
For yk=GkFt+wk,For the channel matrix between k-th of user and base station end,It is assigned for close-to zero beam
Shape matrix,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 n-th of wave beam not by the
K user's multiplexing,For power configuration matrix, [P]nk=pnkThe transmitting work(for being k-th of user on n-th of wave beam
Rate,For the echo signal vector of user group, [s]k=skFor the echo signal of i-th of user, symbol ο is indicated
Hadamard products, wkFor the additive white Gaussian noise that k-th of user is subject to, meet Indicate multiple
Gaussian Profile,For noise variance,1 N is all for elementRDimensional vector；K is the total number of users in user group, and N is to use
Total numbers of beams of family group multiplexing, NRFor the antenna number of user terminal configuration, NTFor the antenna number of base station end 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 beamFor VkThe column vector of middle kth row；
(3) invariant signal is normalized so that multi-input multi-ouput channel dimensionality reduction to single-input single-output channel；Tool
Gymnastics conduct：To invariant signal znkIn inter-beam interference, interfere in wave beam and the general power of noise is normalized, returned
One invariant signal changedhnkIndicate equivalent normalization of k-th of user on n-th of wave beam
Channel gain, qnkIndicate the inter-beam interference after normalization, the sum of interference and noise in wave beam；
(4) it to the invariant signal after normalization, is removed in wave beam and is interfered by sequence interference eliminator, obtain echo signal；Tool
Body includes the following steps：
(41) according to size to the equivalent normalization channel gain h of all usersnkCarry out ascending order arrangement, after rearrangement, k-th
The position of user in the sequence is denoted as k*；
(42) to n-th of wave beam, the invariant signal after being normalized successively to all users according to rearrangement sequence is decoded；
(5) Signal to Interference plus Noise Ratio of echo signal is calculated.
2. the receiver design method of spatial domain pattern segmentation multiple access technique according to claim 1, it is characterised in that：
In the step (5), after rearrangement, kth*Signal to Interference plus Noise Ratio of a user on n-th of wave beam is expressed as：
Wherein：For kth*Signal to Interference plus Noise Ratio of a user on n-th of wave beam.
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| CN106374989B (en) * | 2016-09-19 | 2019-07-16 | 浙江大学 | A kind of nonopiate multi-access method of downlink based on frequency division multiplexing multiaerial system |
| CN106231664B (en) * | 2016-09-19 | 2019-07-16 | 浙江大学 | A kind of power distribution method based on the nonopiate multi-access systems of multiple antennas |
| CN107094040B (en) * | 2017-04-07 | 2020-04-24 | 东南大学 | Pattern mapping matrix optimization method based on space domain pattern segmentation multiple access technology |
| EP3881613A4 (en) | 2018-11-09 | 2022-06-08 | Lenovo (Beijing) Limited | Methods and apparatuses for power control |
| CN110113118B (en) * | 2019-04-11 | 2021-05-18 | 上海师范大学 | Non-orthogonal multiple access system downlink user clustering method |
| CN117749239A (en) * | 2022-09-15 | 2024-03-22 | 大唐移动通信设备有限公司 | Pattern mapping optimization method and device |
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