CN104378147B - Ascending pilot frequency distribution method in mimo system and device - Google Patents
Ascending pilot frequency distribution method in mimo system and device Download PDFInfo
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- CN104378147B CN104378147B CN201310360182.9A CN201310360182A CN104378147B CN 104378147 B CN104378147 B CN 104378147B CN 201310360182 A CN201310360182 A CN 201310360182A CN 104378147 B CN104378147 B CN 104378147B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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Abstract
The present invention relates to the ascending pilot frequency distribution methods and device in mimo system.In one embodiment, a kind of method for mimo system is provided, including：Obtain the uplink channel estimation between a user equipment and a base station equipment；Determine the channel response in main propagation path by the uplink channel estimation, the channel response of any of which propagation path is expressed as related to arrival direction, arrival time, path amplitudes；According to the set of the arrival direction in the main propagation path of the user equipment ascending pilot frequency pattern is distributed for the user equipment.In in some embodiments, the different user devices of intersection can not reuse identical ascending pilot frequency resource while will not bring reception signal interference again the set of the arrival direction in main propagation path each other.
Description
Technical field
The present invention relates generally to mobile communication technology, more particularly, to multi-user's multiple-input and multiple-output (Multiple
User Multiple Input Multiple Output, MU MIMO) transmission technology.
Background technology
Extensive antenna system is due to it is in the benefit on reducing total transmission power by more and more extensive concern.Big rule
If mould antenna system wants practical application, the multiplexing of ascending pilot frequency (pilot) resource will be inevitable.However, extensive antenna
Under the performance of system, especially time division duplex (TDD) pattern, it is multiplexed and draws by ascending pilot frequency pattern (pilot pattern)
The limitation of the inter-cell interference risen.
Invention content
A primary object of the present invention is to provide the new mimo system that is used for, especially extensive antenna system,
Ascending pilot frequency allocation plan, and drawbacks described above in the prior art can be overcome.
One base station is configured with the linear antenna arrays of N transmitting antennas, uses number of subcarriers for NFFTOrthogonal frequency division multiplexing
With (OFDM) system.Wireless multi-path channels are made of K propagation path, arrival time (the Time of of each propagation path
Arrival, ToA) it is τk, arrival direction (Direction of Arrival, DOA) be θk, complex amplitude βk(k=1~K).
The frequency domain representation of channel response can be then expressed as
Wherein, H is a N × NFFTMatrix is tieed up, n-th of transmitting antenna of (n, j) therein a element representation is at j-th
Fading coefficients on subcarrier, and hj=[h (1, j) Λ h (N, j)]TIt is the jth row of H.In formula (1),
a(θk)=[1, exp (2 π θ of ιk),Λ,exp(ι(N-1)2πθk)]T(2),
Indicate steering vector (steering vector)；And
f(τk)=[1, exp (2 π W τ of ιk/NFFT),Λ,exp(ι2π(NFFT-1)Wτk/NFFT)]T(3),
Wherein,W indicates system bandwidth, whereinWhereinIt indicates k-th
The physics angle of arrival in path, d indicate that the distance between antenna, λ indicate the carrier wavelength of transmission, α=d/ λ.
For example, by but be not limited to fixed and evenly spaced quantification manner, spatial domain range and time domain scale can be quantified
For the set of virtual angle and dummy delay, to obtain the expression formula of pseudo channel.For example, virtual angle and dummy delay can
To be quantified as
Wherein,WithIndicate q-th of virtual angle and p-th of dummy delay respectively, Δ θ=2 α/Q be virtual angle it
Between interval, Δ τ=1/W=τmax/ (P+1) is the interval between dummy delay, τmaxIt is maximum delay spread, W is system band
It is wide.Using the definition in formula (4), the channel model in (1) formula can be converted into pseudo channel model by Fourier transformation
H(v)=AHHF and H=AH(v)FH(5),
WhereinAndVirtual channel matrix H(v)It is
One Q × (P+1) ties up matrix, wherein the element representation of q row pths row is h(v)(q, p) indicates that delay isAnd angle isVirtual route complex amplitude.h(v)(q, p) can be represented as
Wherein, S (q, l) is one group of transmission path, is defined as
Since many elements in the limited amount of transmission path, that is, K ＜ ＜ L+1 and P ＜ ＜ N, S (q, l) are zero,
Therefore virtual channel matrix H(v)With approximate sparse characteristic, most elements are zero or are in close proximity to zero.And use thresholding
Judgement, can obtain a limited number of virtual channel matrix coefficients of nonzero element.
By Channel Detection, quantization, operation and threshold judgement, the parameter of pseudo channel can be obtained.And based on virtual letter
The parameter in road, and transmission channel matrix H can be rebuild.About some specific implementations of Channel Detection, it is cited in full text herein
Application No. is the 201310134377.1, Chinese inventions of entitled " channel detection method in extensive antenna system and device "
Patent application, by reference.
The influence between the mutually overlapping user equipment of pilot frequency design (pilot pattern) is investigated below.Pilot frequency design
Mapping pattern of the resource in time frequency space of a pilot signal is distributed in expression.For purposes of brevity, only consider pilot patterns
The situation of case mutually two overlapping user equipmenies, a user equipment is the service user of certain cell, another user equipment
It is the interference user in another cell.Indicate that service user, subscript " I " indicate interference user, remove other with subscript " S "
Subscript, total uplink signal of service user that serving BS receives and interference user is expressed as
Y=HSXS+HIXI+N (8)。
Wherein, N indicates that equivalent noise, Y indicate to receive signal, XSAnd XIIt indicates service user respectively and interferes the hair of user
The number of delivering letters, HSAnd HIService user is indicated respectively and interferes user to the channel transfer matrices of serving BS.Given channel H is enabledIndicate the set of the virtual angle of H,Indicate that d-th of virtual angle, D indicate setIt is big
It is small.It enablesIndicate the set of the dummy delay of H,Indicate that first of dummy delay, L indicate set's
Size.It is worth noting that most of all have sparsity using the wireless channel of extensive antenna system in time domain and spatial domain,
Namely D is much smaller than N, and L is much smaller than τmaxW, wherein τmaxIndicate that maximum delay spread, W indicate system bandwidth.Then, H can be with
It is expressed as with pseudo channel model
Wherein,A (θ)=[1, exp (2 π θ of ι), Λ, exp (2 π θ of ι (N-1))]T,And H(v)=[h(v)(d, l)] it is that D × L ties up virtual channel matrix, (n, l) therein a element h(v)(n, l), which is represented, has delay
And angleVirtual route complex amplitude.
The overlapping of service user and interference user or the set expression of public arrival direction beIts
Size isThe overlapping of service user and interference user or the set expression of public pilot tone beIts size
ForIt enablesService user letter drying than (SINR) when N tends to infinity withIt is linear to increase, that is,
Formula (10) shows：(a) user with entirely different arrival direction set can use identical pilot frequency design
Without being brought a negative impact to system performance；(b) worst case of pilot pollution is arrival time set having the same
User pilot frequency design it is also identical.The optimization distribution of pilot resources can fully consider above 2 points.
In one embodiment, a kind of method for mimo system is provided, including：Obtain a user equipment and one
Uplink channel estimation between a base station equipment；The channel response in main propagation path is determined by the uplink channel estimation,
The channel response of any of which propagation path is expressed as related to arrival direction, arrival time, path amplitudes；According to the user
The set of the arrival direction in the main propagation path of equipment is distributed ascending pilot frequency pattern for the user equipment.Here master
It is the propagation path for characterizing uplink transport channel to want propagation path, typically retained after quantified and threshold judgement that
A little paths.
In one embodiment of the above method, the allocation step includes：If being logical with the base station equipment
Another user equipment of letter connection is assigned with the first ascending pilot frequency pattern, then is user equipment distribution and first pilot tone
The second different ascending pilot frequency pattern of pattern.It is highly preferred that first pilot frequency design and the second ascending pilot frequency pattern are mutually orthogonal.
The distribution of uplink pilot signal and pilot detection will be updated with certain period, it is preferable that a base station equipment will be one
The completely orthogonal ascending pilot frequency figure of ascending pilot frequency pattern of a user equipment distribution and the user equipment accessed newly accessed
Case.
In another embodiment of the above method, the allocation step includes：If with the base station equipment communication link
The set of the arrival direction in the main propagation path of another user equipment connect and the main propagation path of the user equipment
The no intersection of set of arrival direction, and be that another user equipment is assigned with the first ascending pilot frequency pattern, then it is institute
It states user equipment and distributes the first ascending pilot frequency pattern.In this way, uplink can be reused in base station equipment serving cell
Pilot resources while reception signal interference will not be brought again.
In another embodiment of the above method, neighboring community to distribute ascending pilot frequency resource mutually orthogonal.
In the further embodiment of the above method, adjacent pilot resources reuse pattern is led using uplink different from each other
Frequency pattern splitting scheme.
In other one embodiment of the above method, the base station equipment is configured with 16 or more transmitting antennas.
In one embodiment, a kind of device for mimo system is provided, including：Acquisition module is configured to obtain
Uplink channel estimation between one user equipment and a base station equipment；Determining module is configured to be estimated by the up channel
Meter determines the channel response in main propagation path, the channel response of any of which propagation path be expressed as with arrival direction, arrive
It is related up to time, path amplitudes.User equipment in one embodiment includes the device.Base station equipment packet in one embodiment
Include the device.Here main propagation path is the propagation path for characterizing uplink transport channel, typically quantified and door
Those of retain path after limit judgement.
In one embodiment of above-mentioned apparatus, described device further includes：Distribution module is configured to be set according to the user
The set of the arrival direction in the standby main propagation path is distributed ascending pilot frequency pattern for the user equipment.
In another embodiment of above-mentioned apparatus, the distribution module is additionally configured to：If being and the base station
Another user equipment of equipment communication connection is assigned with the first ascending pilot frequency pattern, then is user equipment distribution and described the
The second different ascending pilot frequency pattern of one pilot frequency design.
In another embodiment of above-mentioned apparatus, the distribution module is additionally configured to：If logical with the base station equipment
Believe the main propagation road of the set and the user equipment of the arrival direction in the main propagation path of another user equipment of connection
The no intersection of set of the arrival direction of diameter, and be that another user equipment is assigned with the first ascending pilot frequency pattern, then
The first ascending pilot frequency pattern is distributed for the user equipment.
In one embodiment, the device in a kind of base station equipment for mimo system is provided, including：Determine mould
Block is configured to determine the arrival direction in the uplink main propagation path between a user equipment and the base station equipment, wherein
The channel response in any upward propagation path is expressed as related to arrival direction, arrival time, path amplitudes；Distribution module is matched
It is set to and is distributed for the user equipment according to the set of the arrival direction in the uplink main propagation path of the user equipment
Ascending pilot frequency pattern.Here main propagation path is the propagation path for characterizing uplink transport channel, typically quantified
With those of retain path after threshold judgement.
In one embodiment of above-mentioned apparatus, the distribution module is additionally configured to：If being to be set with the base station
Another user equipment of standby communication connection is assigned with the first ascending pilot frequency pattern, then is user equipment distribution and described first
The second different ascending pilot frequency pattern of pilot frequency design.
In another embodiment of above-mentioned apparatus, the distribution module is additionally configured to：If logical with the base station equipment
Believe the main propagation road of the set and the user equipment of the arrival direction in the main propagation path of another user equipment of connection
The no intersection of set of the arrival direction of diameter, and be that another user equipment is assigned with the first ascending pilot frequency pattern, then
The first ascending pilot frequency pattern is distributed for the user equipment.
A kind of base station equipment includes one of aforementioned any device.In one embodiment, base station equipment configured with 16 with
Upper transmitting antenna.
In one embodiment, in system residing for aforementioned any device or equipment, neighboring community distributes ascending pilot frequency
Resource is mutually orthogonal.
In yet another embodiment, in system residing for aforementioned any device or equipment, adjacent pilot resources reuse pattern
Using ascending pilot frequency pattern splitting scheme different from each other.
Foregoing has outlined the technical characteristic of the present invention and advantage so that present invention detailed description below is more readily understood.
Other features and advantages of the present invention will be described below, and which form the claimed subject matters of the present invention.This field skill
Art personnel will be understood that revealed concept and embodiment can be easily used as changing or design it is other for realizing with
The structure of the identical purpose of the present invention or the basis of flow.It should also be understood by those skilled in the art that such equivalent constructions are not
Away from the spirit and scope of the appended claims.
Description of the drawings
In conjunction with attached drawing, the detailed description below in relation to the preferred embodiment of the present invention will become apparent to.The present invention is to lift
The mode of example is explained, and is not limited to attached drawing, and similar reference numeral indicates similar element in attached drawing.
Fig. 1 shows application environment according to an embodiment of the invention；
Fig. 2 shows the flow charts according to an embodiment of the invention for the method in mimo system；
Fig. 3 shows cellular network configuration according to an embodiment of the invention；
Fig. 4 shows the ascending pilot frequency money according to an embodiment of the invention for cellular network configuration shown in Fig. 3
Source distribution diagram；
Fig. 5 and Fig. 6 respectively illustrates the base station equipment according to an embodiment of the invention suitable for mimo system and user
The structure chart of device in equipment.
Specific implementation mode
The detailed description of attached drawing is intended to the explanation as currently preferred embodiment of the invention, and is not intended to represent the present invention
The only form that can be achieved.It should be understood that identical or equivalent function can be by being intended to be contained in the essence of the present invention
Different embodiments of the god within the scope of are completed.
Those skilled in the art will be understood that means and function described herein can use combine programmable microprocessor and
The software function of all-purpose computer is realized to realize, and/or using application-specific integrated circuit (ASIC), and/or uses all
It is realized such as the programmable logic device (PLD) of field programmable gate array (FPGA), and/or uses other similar techniques
To realize.It will also be appreciated that although the present invention is mainly illustrated in the form of method and apparatus, the present invention can also be specific
Turn to computer program product and the system comprising computer processor He the memory for being connected to processor, wherein memory
It is encoded with the one or more programs for the function that can complete to disclose herein.
Those skilled in the art will be understood that base station referred to herein or base station equipment are such as, but not limited to LTE system
The either node B in lte-a system (Node B) or evolution node B (evolved Node B, eNB), technology of the invention
Scheme is also not necessarily limited to be applicable in LTE system or lte-a system.
Fig. 1 shows application environment according to an embodiment of the invention.As shown, three base station equipments 11,12,
13 is adjacent, and three hexagons schematically show the respective signal service area of three base station equipments, three user equipmenies 16,17,
18 are located within the signal service area of these three base station equipments.
Fig. 2 shows the flow charts according to an embodiment of the invention for the method 20 in mimo system.Such as figure
Shown, method 20 includes step 21,22 and 23.
In step 21, the uplink channel estimation between a user equipment and a base station equipment is obtained.In step 22
In, the channel response in main propagation path, the channel response of any of which propagation path are determined by the uplink channel estimation
It is expressed as related to arrival direction, arrival time, path amplitudes.In step 23, according to the described main of the user equipment
The set of the arrival direction of propagation path is distributed ascending pilot frequency pattern for the user equipment.
It is double in frequency division by taking method 20 is for the up channel shown in Fig. 1 between base station equipment 11 and user equipment 16 as an example
In work system, step 21,22,23 are executed by base station equipment 11.In step 21, base station equipment 11 can be by detecting user
Pilot tone (pilot) signal transmitted by equipment 16 obtains uplink channel estimation between the two.And the specific implementation of step 22
The mode recorded in Summary may be used in mode, can also use application No. is 201310134377.1, is entitled
Recorded mode in the Chinese invention patent application of " channel detection method in extensive antenna system and device ".
In tdd systems, step 21 and/or 22 can also partly or wholly it be executed by user equipment.Example
Such as, user equipment 16 can detect the down-bound pilot frequency signal transmitted by base station equipment 11 to obtain down channel estimation, then root
Uplink channel estimation is obtained according to the channel reciprocity of tdd systems.It can be estimated by 16 feeding back uplink channel of user equipment
Meter, and the parameter in feature propagation path is determined from the uplink channel estimation by base station equipment 11.It can also be by user equipment 16
The parameter in feature propagation path is determined from uplink channel estimation, and by these parameter feedbacks to base station equipment 11.
In one embodiment of method 20, step 23 includes：If being to be communicated to connect with the base station equipment
Another user equipment is assigned with the first ascending pilot frequency pattern, then is distributed for the user equipment different from first pilot frequency design
The second ascending pilot frequency pattern.It is highly preferred that first pilot frequency design and the second ascending pilot frequency pattern are mutually orthogonal.
The distribution of uplink pilot signal and pilot detection will be updated with certain period, it is preferable that a base station is set
It is standby will be the user equipment that newly an access distribution with the ascending pilot frequency pattern of the user equipment accessed it is completely orthogonal on
Row pilot frequency design.For example, the uplink of 17 elder generation's access base station equipment 11 of user equipment, and the first ascending pilot frequency figure is assigned
Case；The uplink of base station equipment 11 is accessed after user equipment 16, then base station equipment 11 is on the distribution of user equipment 16 and first
The second orthogonal ascending pilot frequency pattern of row pilot frequency design.
In another embodiment of method 20, step 23 includes：If another with base station equipment communication connection
The arrival direction of the set and the main propagation path of the user equipment of the arrival direction in the main propagation path of user equipment
The no intersection of set, and be that another user equipment is assigned with the first ascending pilot frequency pattern, then set for the user
Back-up matches the first ascending pilot frequency pattern.
Base station equipment when carrying out uplink receiving signal processing, usually using user equipment up channel correlation matrix into
Row receives signal filtering.When up channel is expressed as the channel response in main propagation path, and the letter of any of which propagation path
Road response be expressed as it is related to arrival direction, arrival time, path amplitudes, reception signal filter will filter out the user equipment
Other users signal except the set of the arrival direction in main propagation path.Therefore, the serving cell of the same base station equipment
Interior, the different user devices of intersection can not reuse on identical the set of the arrival direction in main propagation path each other
Row pilot resources while reception signal interference will not be brought again.
Fig. 3 shows that cellular network configuration according to an embodiment of the invention, Fig. 4 show a kind of for Fig. 3 institutes
Show the ascending pilot frequency resource allocation map of cellular network configuration.Cellular network shown in Fig. 3 includes cell (cell) 1 to cell 9
Totally nine cells.Arrow indicates that frequency becomes general orientation in Fig. 4, and 1-1 indicates that the 1st ascending pilot frequency pattern in cell 1,9-3 indicate
The 3rd ascending pilot frequency pattern in cell 9, other, which are analogized, understands.As shown in figure 4, neighboring community 1,2,3 (or cell 4,5,6, or
Cell 7,8,9) ascending pilot frequency resource it is orthogonal.Cell 1,4,7 (or cell 2,5,8 or cell 3,6,9) multiplexing is identical
Uplink pilot signal resource, the uplink pilot signal resource reusability in this are 1/3.Cell 1,4,7 (or cell 2,5,8, or
Cell 3,6,9) be relatively adjacent pilot resources reuse pattern, the ascending pilot frequency pattern splitting scheme of respective use that
This is different.
Fig. 5 and Fig. 6 respectively illustrates the base station equipment according to an embodiment of the invention suitable for mimo system and user
The structure chart of device in equipment.
As shown in figure 5, device 50a includes acquisition module 51, determining module 52 and distribution module 53；Device 50b includes true
Cover half block 52 and distribution module 53；Device 50c includes distribution module 53.Device 50a, 50b or 50c are generally disposed in base station equipment
In.
Acquisition module 51 is configured to obtain the uplink channel estimation between a user equipment and a base station equipment.It determines
Module 52 is configured to determine the channel response in main propagation path by the uplink channel estimation, any of which propagation path
Channel response is expressed as related to arrival direction, arrival time, path amplitudes.Distribution module 53 is configured to be set according to the user
The set of the arrival direction in the standby main propagation path is distributed ascending pilot frequency pattern for the user equipment.Here main
Those of propagation path is the propagation path for characterizing uplink transport channel, retain after typically quantified and threshold judgement
Path.
As shown in fig. 6, device 60a includes acquisition module 51 and determining module 52；Device 60b includes acquisition module 51.Dress
It sets 60a or 60b is generally disposed in user equipment.
By taking base station equipment in frequency division duplex system 11 and user equipment 16 as an example, base station equipment 11 can include such as Fig. 5 institutes
The device 50a shown.Acquisition module 51 in the device 50a of base station equipment 11 can be by detecting leading transmitted by user equipment 16
Frequently (pilot) signal obtains uplink channel estimation between the two.And determining module 52 determines the letter in main propagation path
Road response specific implementation, the mode recorded in Summary may be used, can also use application No. is
The Chinese invention patent application of 201310134377.1, entitled " channel detection method in extensive antenna system and device "
In recorded mode.
With base station equipment in tdd systems 11 and user equipment 16, user equipment 16 can include as shown in FIG. 6
Device 60a or 60b.For example, the acquisition module 51 in user equipment 16 can detect the descending pilot frequency transmitted by base station equipment 11
Signal obtains uplink channel estimation to obtain down channel estimation further according to the channel reciprocity of tdd systems.It can
With by 16 feeding back uplink channel estimation of user equipment, and by the determining module 52 in base station equipment 11 from the uplink channel estimation
Determine the parameter in main propagation path.It can also be determined and be led from uplink channel estimation by the determining module 52 in user equipment 16
The parameter in path is broadcast, and by these parameter feedbacks to base station equipment 11.
In one embodiment of above-mentioned apparatus, distributor 53 is additionally configured to：If being and the base station equipment
Another user equipment of communication connection is assigned with the first ascending pilot frequency pattern, then is led with described first for user equipment distribution
The second different ascending pilot frequency pattern of frequency pattern.It is highly preferred that first pilot frequency design and the second ascending pilot frequency pattern are mutually just
It hands over.
The distribution of uplink pilot signal and pilot detection will be updated with certain period, it is preferable that a base station is set
It is standby will be the user equipment that newly an access distribution with the ascending pilot frequency pattern of the user equipment accessed it is completely orthogonal on
Row pilot frequency design.For example, the uplink of 17 elder generation's access base station equipment 11 of user equipment, and the first ascending pilot frequency figure is assigned
Case；The uplink of base station equipment 11 is accessed after user equipment 16, then base station equipment 11 is on the distribution of user equipment 16 and first
The second orthogonal ascending pilot frequency pattern of row pilot frequency design.
In another embodiment of above-mentioned apparatus, distributor 53 is additionally configured to：If communicated with the base station equipment
The main propagation path of the set and the user equipment of the arrival direction in the main propagation path of another user equipment of connection
Arrival direction the no intersection of set, and be that another user equipment is assigned with the first ascending pilot frequency pattern, then for
The user equipment distributes the first ascending pilot frequency pattern.For example, the uplink of 17 elder generation's access base station equipment 11 of user equipment
Road, and the first ascending pilot frequency pattern is assigned；The uplink of base station equipment 11, and user equipment are accessed after user equipment 16
The no intersection of set of the arrival direction in 17 and 16 respective uplink main propagation paths, then base station equipment 11 is also user equipment
16 the first ascending pilot frequency patterns of distribution.
Base station equipment when carrying out uplink receiving signal processing, usually using user equipment up channel correlation matrix into
Row receives signal filtering.When up channel is expressed as the channel response in main propagation path, and the letter of any of which propagation path
Road response be expressed as it is related to arrival direction, arrival time, path amplitudes, reception signal filter will filter out the user equipment
Other users signal except the set of the arrival direction in main propagation path.Therefore, the serving cell of the same base station equipment
Interior, the different user devices of intersection can not reuse on identical the set of the arrival direction in main propagation path each other
Row pilot resources while reception signal interference will not be brought again.
Aforementioned either method and device may be incorporated for extensive antenna system, base station equipment therein configured with 16 with
Upper transmitting antenna.
Those skilled in the art will be understood that the function of any of the above-described module can divide by multiple entity modules or function mould
Block executes, and the function of above-mentioned multiple modules can also be integrated in an entity module or function module to execute.
Although having illustrated and having described different embodiments of the invention, invention is not limited to these embodiments.Right
The ordinal numbers such as " first " that occurs in it is required that, " second " function only as the effect of difference, and are not meant between corresponding component
There are any specific sequence or connection relations.The technical characteristic only occurred in certain claims or embodiment also simultaneously unawareness
Taste, which, cannot be combined with other features in other claims or embodiment to realize beneficial new technical solution.Not
In the case of the spirit and scope of the present invention as described in claims, it is many modification, change, deformation, substitute with
And it equally will be apparent to those skilled in the art.
Claims (15)
1. a kind of method for mimo system, including：
Obtain the uplink channel estimation between a user equipment and a base station equipment；
The channel response in main propagation path, the channel response of any of which propagation path are determined by the uplink channel estimation
It is expressed as related to arrival direction, arrival time, path amplitudes, the main propagation path is for characterizing uplink transport channel
Propagation path；
According to the set of the arrival direction in the main propagation path of the user equipment uplink is distributed for the user equipment
Pilot frequency design,
Wherein adjacent pilot resources reuse pattern uses ascending pilot frequency pattern splitting scheme different from each other.
2. the method as described in claim 1, which is characterized in that the allocation step includes：
If being that another user equipment communicated to connect with the base station equipment is assigned with the first ascending pilot frequency pattern, for
The user equipment distributes the second ascending pilot frequency pattern different from the first ascending pilot frequency pattern.
3. the method as described in claim 1, which is characterized in that the allocation step includes：
If with the base station equipment communication connection another user equipment main propagation path arrival direction set with
The no intersection of set of the arrival direction in the main propagation path of the user equipment, and be another user equipment point
Match the first ascending pilot frequency pattern, then distributes the first ascending pilot frequency pattern for the user equipment.
4. the method as described in claim 1, which is characterized in that neighboring community to distribute ascending pilot frequency resource mutually orthogonal.
5. the method as described in claim 1, which is characterized in that the base station equipment is configured with 16 or more transmitting antennas.
6. a kind of device for mimo system, including：
Acquisition module is configured to obtain the uplink channel estimation between a user equipment and a base station equipment；
Determining module is configured to determine the channel response in main propagation path by the uplink channel estimation, and any of which passes
Broadcast path channel response be expressed as it is related to arrival direction, arrival time, path amplitudes, the main propagation path be used for table
Levy the propagation path of uplink transport channel；With
Distribution module is configured to according to the set of the arrival direction in the main propagation path of the user equipment come for the use
Family equipment distributes ascending pilot frequency pattern,
Wherein adjacent pilot resources reuse pattern uses ascending pilot frequency pattern splitting scheme different from each other.
7. device as claimed in claim 6, which is characterized in that the distribution module is additionally configured to：
If being that another user equipment communicated to connect with the base station equipment is assigned with the first ascending pilot frequency pattern, for
The user equipment distributes the second ascending pilot frequency pattern different from the first ascending pilot frequency pattern.
8. device as claimed in claim 6, which is characterized in that the distribution module is additionally configured to：
If with the base station equipment communication connection another user equipment main propagation path arrival direction set with
The no intersection of set of the arrival direction in the main propagation path of the user equipment, and be another user equipment point
Match the first ascending pilot frequency pattern, then distributes the first ascending pilot frequency pattern for the user equipment.
9. the device in a kind of base station equipment for mimo system, including：
Determining module is configured to determine the channel in the uplink main propagation path between a user equipment and the base station equipment
Response, the channel response in any of which upward propagation path are expressed as, institute related to arrival direction, arrival time, path amplitudes
State propagation path of the main propagation path for characterizing uplink transport channel；
Distribution module, be configured to according to the set of the arrival direction in the uplink main propagation path of the user equipment come for
The user equipment distributes ascending pilot frequency pattern,
Wherein adjacent pilot resources reuse pattern uses ascending pilot frequency pattern splitting scheme different from each other.
10. device as claimed in claim 9, which is characterized in that the distribution module is additionally configured to：
If being that another user equipment communicated to connect with the base station equipment is assigned with the first ascending pilot frequency pattern, for
The user equipment distributes the second ascending pilot frequency pattern different from the first ascending pilot frequency pattern.
11. device as claimed in claim 9, which is characterized in that the distribution module is additionally configured to：
If with the base station equipment communication connection another user equipment main propagation path arrival direction set with
The no intersection of set of the arrival direction in the main propagation path of the user equipment, and be another user equipment point
Match the first ascending pilot frequency pattern, then distributes the first ascending pilot frequency pattern for the user equipment.
12. the device as described in any one of claim 6-11, which is characterized in that neighboring community distributes ascending pilot frequency money
Source is mutually orthogonal.
13. a kind of user equipment, including：
Acquisition module is configured to obtain the uplink channel estimation between the user equipment and a base station equipment；With
Determining module is configured to determine the channel response in main propagation path by the uplink channel estimation, and any of which passes
Broadcast path channel response be expressed as it is related to arrival direction, arrival time, path amplitudes, the main propagation path be used for table
Levy the propagation path of uplink transport channel；
Wherein according to the set of the arrival direction in the main propagation path of the user equipment, the user equipment is assigned
Ascending pilot frequency pattern, and
Wherein adjacent pilot resources reuse pattern uses ascending pilot frequency pattern splitting scheme different from each other.
14. the device described in any one of a kind of base station equipment, including claim 6-11.
15. base station equipment as claimed in claim 14, which is characterized in that the base station equipment emits day configured with 16 or more
Line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310360182.9A CN104378147B (en) | 2013-08-16 | 2013-08-16 | Ascending pilot frequency distribution method in mimo system and device |
| TW103122557A TW201519595A (en) | 2013-08-16 | 2014-06-30 | Method and apparatus for allocating uplink pilot in mimo system |
| PCT/IB2014/001707 WO2015022577A1 (en) | 2013-08-16 | 2014-07-25 | Method and apparatus for allocating uplink pilot in mimo system |
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| CN201310360182.9A CN104378147B (en) | 2013-08-16 | 2013-08-16 | Ascending pilot frequency distribution method in mimo system and device |
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| WO2017105299A1 (en) * | 2015-12-14 | 2017-06-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and apparatus for pilot sequence allocation |
| CN105634709B (en) * | 2016-01-19 | 2018-09-04 | 北京联合大学 | A kind of pilot distribution method |
| CN108604913B (en) * | 2016-02-08 | 2022-02-22 | 索尼集团公司 | Operating a cellular MIMO system |
| CN109076056B (en) | 2016-04-21 | 2022-07-12 | 瑞典爱立信有限公司 | Method for use in terminal device and network device and associated devices |
| EP3255851B1 (en) * | 2016-06-08 | 2019-08-07 | Nxp B.V. | Processing module for a communication device and method therefor |
| CN106713189B (en) * | 2016-07-08 | 2019-10-11 | 北京展讯高科通信技术有限公司 | Uplink channel estimation method, pilot signal transmission method and base station |
| CN107666378B (en) * | 2016-07-28 | 2020-02-25 | 普天信息技术有限公司 | Pilot signal distribution method |
| WO2018068859A1 (en) * | 2016-10-13 | 2018-04-19 | Huawei Technologies Duesseldorf Gmbh | Base station and method for allocating pilot sequences |
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