CN107302385A - Virtual multi-input, multi-output communication method, apparatus and system - Google Patents
Virtual multi-input, multi-output communication method, apparatus and system Download PDFInfo
- Publication number
- CN107302385A CN107302385A CN201610225520.1A CN201610225520A CN107302385A CN 107302385 A CN107302385 A CN 107302385A CN 201610225520 A CN201610225520 A CN 201610225520A CN 107302385 A CN107302385 A CN 107302385A
- Authority
- CN
- China
- Prior art keywords
- user terminal
- arrival
- input
- base station
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
The present invention provides a kind of virtual multi-input, multi-output communication method, apparatus and system, and the channel estimation current by obtaining each user terminal can consider the situation of each user terminal in real time.In this case, the user terminal for selecting predetermined number according to preparatory condition invents a multiple-input and multiple-output user terminal, and allows this multiple-input and multiple-output user terminal to be communicated with base station according to MIMO technique.This strategy for matching selection is based on real-time channel estimation, it is contemplated that the current situation of each user terminal, it is possible to increase communication efficiency between base station and the multiple-input and multiple-output user terminal fictionalized.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of virtual multi-input, multi-output communication method, dress
Put and system.
Background technology
MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) technology refers in transmitting terminal
Multiple transmitting antennas and reception antenna are set respectively with receiving terminal so that signal passes through transmitting terminal and receiving terminal
Multiple antenna transmission and reception, so as to improve communication quality.MIMO can make full use of space resources, pass through
Multiple antennas realize MIMO, in the case where not increasing frequency spectrum resource and antenna transmission power, Ke Yicheng
Raising system channel capacity again, is the core technology of next generation communication.Although MIMO technology holds in system
There is a significant advantage in terms of amount and the availability of frequency spectrum, but to mobile terminal that volume, power consumption etc. are all restricted
For, it is unpractical to carry out MIMO to communicate with base station by configuring many antennas.First, it is mobile whole
The volume at end is too small, if setting many antennas, antenna spacing can be caused too small, it is impossible to meet aerial array
Requirement of the interval more than channel coherence distance.On the other hand, many antennas are set necessarily to bring user terminal
The problem of high power consumption and high cost.
It is limited to volume and the problem of cost should not configure multiple antennas to solve user terminal, 3GPP (3rd
Generation Partnership Project, third generation partner program) LTE (Long Term Evolution,
Long Term Evolution) a kind of uplink virtual MIMO technology is proposed, multiple users with single antenna are combined,
Virtual mimo channel is formed in same resource block, while data are sent to the base station with multiple antennas,
So as to reach the performance that MIMO technology has.The key of virtual MIMO technology is the plan of selection pairing user
Slightly, its quality directly affects systematic function.
Some pairing algorithms are the unsuitable matching tables that each user terminal is preset in base station in the prior art,
Record has the identification information for the other users terminal for being not suitable for being matched with the user terminal in each table,
When needing to be matched, a pair of unpaired user terminals that other side is not suitable for matching table will not belong to by base station
With paired.This matching method does not account for the real-time situation of each user terminal, and its pairing is based on all the time
The unsuitable matching table being previously set, and in a practical situation, the situation of user terminal may all exist at the moment
Change is produced, the user terminal that last moment can not be matched by factors such as position, angles at the moment may be used
It can be adapted to mutual pairing again.Pairing strategy according to solidification may be not good because of the pairing user of selection,
And cause the communication efficiency between base station and the user terminal of pairing poor.
The content of the invention
The main technical problem to be solved in the present invention is to provide a kind of virtual multi-input, multi-output communication method,
Solution is matched according to intrinsic pairing strategy in the prior art, do not account for user terminal real-time condition and
The technical problem of communication efficiency difference between caused base station and the user terminal of pairing.
In order to solve the above technical problems, the present invention provides a kind of virtual multi-input, multi-output communication method, including：
Obtain the current channel estimation of multiple user terminals communicated with base station；
Select predetermined from each user terminal according to the channel estimation and preparatory condition of each user terminal
The user terminal of number, the user terminal of the predetermined number is at least two user terminals；
Each user terminal selected is invented into a multiple-input and multiple-output user terminal, and makes base station
Communicated based on MIMO technique with the multiple-input and multiple-output user terminal.
In an embodiment of the present invention, the preparatory condition is：The difference of horizontal angle of arrival between user terminal pair
Value is more than or equal to first threshold, and the difference of vertical angle of arrival is less than or equal to Second Threshold；The user
Terminal-pair includes the user terminal that any two is communicated with base station.
In an embodiment of the present invention, according to the channel estimation and preparatory condition of each user terminal from each
The user terminal of predetermined number is selected to include in the user terminal：
According to the horizontal angle of arrival of each user terminal of the channel estimation calculation of each user terminal with it is vertical
Angle of arrival；
Calculate the difference of the difference of horizontal angle of arrival and vertical angle of arrival between each user terminal pair；
Symbol is filtered out with the difference of vertical angle of arrival according to the difference of horizontal angle of arrival between each user terminal pair
Close the user terminal pair of the preparatory condition；
The user terminal of predetermined number is selected from the user terminal centering filtered out.
In an embodiment of the present invention, the channel estimation and preparatory condition according to each user terminal
Also include before the user terminal that predetermined number is selected from each user terminal：
The predetermined number, first ginseng are determined according to the first parameter of the current demodulated receive information in base station
Number includes signal to noise ratio, CRC.
It is described that the user terminal selected is invented into a multi input in an embodiment of the present invention
Multi output user terminal, and it is whole with the multiple-input and multiple-output user base station is based on MIMO technique
End also includes the weights of each bay of calculating before being communicated, the weights for the base station with it is described
Subsequent communications between multiple-input and multiple-output user terminal.
In an embodiment of the present invention, the weights for calculating each bay include：
The average for the vertical angle of arrival of each user terminal selected is calculated according to below equation：
V is the average of vertical angle of arrival；A is the predetermined number；viFor each user terminal selected
Vertical angle of arrival；
The weights for obtaining each bay are calculated according to below equation：
WM=e-j(M-1)2πΔsinv/λ
WMFor the weights of m-th vertical antenna array element；λ is wavelength；Δ is the spacing between bay.
The present invention also provides a kind of virtual mimo communication device, including：
Channel estimation module, the channel estimation current for obtaining multiple user terminals communicated with base station；
User's selecting module, for the channel estimation and preparatory condition according to each user terminal from each described
The user terminal of predetermined number is selected in user terminal, the user terminal of the predetermined number is used at least two
Family terminal；
Virtual communication module, for each user terminal selected to be invented into a multiple-input and multiple-output
User terminal, and base station is based on MIMO technique and multiple-input and multiple-output user terminal progress
Communication.
In an embodiment of the present invention, the preparatory condition is：The difference of horizontal angle of arrival between user terminal pair
Value is more than or equal to first threshold, and the difference of vertical angle of arrival is less than or equal to Second Threshold；The user
The user terminal that terminal-pair is communicated by any two with base station is constituted.
In an embodiment of the present invention, user's selecting module includes：
Angle calculation module, for each user terminal of channel estimation calculation according to each user terminal
Horizontal angle of arrival and vertical angle of arrival；
Difference calculating module, difference and vertical angle of arrival for calculating horizontal angle of arrival between each user terminal pair
Difference；
Conditional filtering module, for being arrived according to the difference of horizontal angle of arrival between each user terminal pair with vertical
Difference up to angle filters out the user terminal pair for meeting the preparatory condition；
User's selecting module, it is whole for the user from the user terminal centering selection predetermined number filtered out
End.
In an embodiment of the present invention, in addition to：
Number acquisition module, in the channel estimation and preparatory condition according to each user terminal from each institute
Before stating the user terminal that predetermined number is selected in user terminal, according to the of the current demodulated receive information in base station
One parameter determines the predetermined number, and first parameter includes signal to noise ratio, CRC.
In an embodiment of the present invention, in addition to：
Weight computing module, for the user terminal selected to be invented into a multiple-input and multiple-output
User terminal, and base station is based on MIMO technique and multiple-input and multiple-output user terminal progress
Before communication, the weights of each bay are calculated, the weights are used for subsequent communications.
In an embodiment of the present invention, also described weight computing module includes：
Mean value computation submodule, is vertically arrived for calculating each user terminal selected according to below equation
Up to the average at angle：
V is the average of vertical angle of arrival；A is the predetermined number；viFor each user terminal selected
Vertical angle of arrival；
Weight computing submodule, the weights of each bay are obtained for being calculated according to below equation：
WM=e-j(M-1)2πΔsinv/λ
WMFor the weights of m-th vertical antenna array element；λ is wavelength；Δ is the spacing between bay.
The present invention also provides a kind of virtual multiple-input-multiple-output communication system, including multiple user terminals and base station,
Virtual mimo communication device as described above is included in the base station.
The beneficial effects of the invention are as follows：
The virtual multi-input, multi-output communication method that the present invention is provided, by obtaining the letter of each user terminal currently
Road is estimated, the situation of each user terminal can be considered in real time.In this case, selected according to preparatory condition
The user terminal of predetermined number invents a multiple-input and multiple-output user terminal, and makes this multi input how defeated
Go out user terminal to be communicated according to MIMO technique with base station.This strategy for matching selection is based on
Real-time channel estimation, it is contemplated that the current situation of each user terminal, it is possible to increase base station and fictionalize it is many
Input communication efficiency between multi output user terminal.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the virtual multi-input, multi-output communication method provided in the embodiment of the present invention one；
Fig. 2 is a kind of flow chart of the user terminal for selecting predetermined number provided in the embodiment of the present invention one；
Fig. 3 is a kind of flow chart of each bay weights of calculating provided in the embodiment of the present invention one；
A kind of structure of virtual mimo communication devices of the Fig. 4 to be provided in the embodiment of the present invention two is shown
It is intended to；
Fig. 5 is another structure of the virtual mimo communication device provided in the embodiment of the present invention two
Schematic diagram；
Fig. 6 is a kind of structural representation of user's selecting module in Fig. 4 or Fig. 5；
Fig. 7 is another structure of the virtual mimo communication device provided in the embodiment of the present invention two
Schematic diagram；
Fig. 8 is a kind of structural representation of weight computing module in Fig. 7.
Embodiment
The present invention is described in further detail below by embodiment combination accompanying drawing.
Embodiment one：
The present embodiment provides a kind of virtual multi-input, multi-output communication method, refer to Fig. 1, this method includes：
S101, the channel estimation for obtaining multiple user terminals communicated with base station.
So-called channel estimation, the model parameter estimation for some channel model that exactly it will be assumed from data are received
Process out.Channel estimation is obtained typically to carry out by pilot tone.
S102, according to the channel estimation value and preparatory condition of each user terminal select from each user terminal predetermined
The user terminal of number.
In the present embodiment, communicated by being then based on MIMO technology, therefore the user terminal selected
At least two, that is to say, that predetermined number is more than or equal to 2.As to how determining to need how many of selection actually
User terminal, this is needed according to depending on current demodulated the first parameter for receiving signal in base station, and for example base station is current
Demodulate a frame and receive signal, then draw the SNR (Signal-Noise Ratio, signal to noise ratio) of the frame signal
With CRC (Cyclic Redundancy Code, Cyclic Redundancy Code), then base station is according to SNR and CRC determinations
Predetermined number is how many actually, and at this moment the first parameter just includes SNR and CRC.Those skilled in the art should
It is realized that, the parameter that the first parameter can also include other influences signal quality is determined.
Below to how to select user's end from multiple user terminals communicated with base station according to preparatory condition
The details at end is illustrated, incorporated by reference to Fig. 2, and Fig. 2 is selected from multiple user terminals communicated with base station
Select the flow chart of the user terminal of predetermined number：
S201, arrived with vertical according to the horizontal angle of arrival of each user terminal of channel estimation calculation of each user terminal
Up to angle.
Base station can obtain the channel estimation of each user terminal by pilot tone, then according to each user terminal
Channel estimation, use batlett (Charles Bartlett algorithm), capon (minimum variance distortionless response wave beam shapes
Into algorithm), MUSIC (Multiple sginal classification, multi-signal sorting algorithm) or ESPRIT
(Estimating Signal Parameters via Rotational Invariance Techniques, based on rotation not
The Signal parameter estimation algorithm of change technology) scheduling algorithm can estimate each user terminal horizontal angle of arrival and hang down
Straight angle of arrival.
S202, the difference for calculating the difference of horizontal angle of arrival and vertical angle of arrival between each user terminal pair.
One user terminal is constituted to the user terminal communicated by any two with base station, that is to say, that meter
Calculate the difference of horizontal angle of arrival and vertical angle of arrival between any two user terminal.
S203, filtered out with the difference of vertical angle of arrival according to the difference of horizontal angle of arrival between each user terminal pair
Meet the user terminal pair of preparatory condition.
Assuming that the vertical angle of arrival of user terminal n is vn, horizontal direction angle of arrival position hn, corresponding user terminal
M vertical angle of arrival is vm, horizontal direction angle of arrival is hm, then user terminal n and m needs satisfaction is following
Condition just has the qualification for carrying out virtual MIMO pairing：
|hm-hn| >=x, | vm-vn|≤y
Wherein x is first threshold, and y is Second Threshold, and first threshold and Second Threshold belong to critical value, when two
When the difference of horizontal angle of arrival is more than first threshold between individual user terminal, difference is bigger, then the communication after matching
Effect is better, if the difference of horizontal angle of arrival is less than first threshold, difference is smaller, and communicate effect after pairing
Fruit is poorer.When the difference of vertical angle of arrival between user terminal pair is more than Second Threshold, difference is bigger, communication
Effect is poorer, and when the difference of vertical angle of arrival between user terminal pair is less than Second Threshold, difference is smaller, leads to
Believe that effect is better.According to engineering experience, x is typically set to 10, y is set to 3 more properly, this
Art personnel it should be appreciated that above-mentioned numerical value simply determined according to practical experience, be not realize
The necessary choice of the present invention.
S204, the user terminal from the user terminal centering selection predetermined number filtered out.
Needed before being selected in advance according to signal to noise ratio and Cyclic Redundancy Code of base station demodulated received signal etc.
Parameter can be only achieved optimum efficiency it is determined that selecting how many user terminals to carry out pairing.It is worth noting that,
As long as the process of this determination predetermined number ensure before S204 complete, with S201, S202 and
Do not have strict sequential between S203 to limit.
If meeting the user terminal of preparatory condition has 4, and it is determined that selection after the demodulated received signal of base station
It is situation of presence needs that two user terminals, which carry out pairing, then two are selected from this 4 user terminals
When, it can arbitrarily select also be selected according to other established principles.
S103, each user terminal selected invented into a multiple-input and multiple-output user terminal, and make base
Stand and communicated based on MIMO technique with the multiple-input and multiple-output user terminal.
In a kind of preferred exemplary of the present embodiment, in order that follow-up communication efficiency is more preferably, in step S103
Also need to further calculate the weights of each bay before, the weights of these antenna array element are used for base station and many
The communication inputted between multi output user terminal.The process for calculating each bay weights refer to Fig. 3：
The average for the vertical angle of arrival of each user terminal that S301, calculating are selected.
If final choice has gone out A, B, C, D, tetra- user terminals carry out virtual MIMO pairing, this four
The vertical angle of arrival of user terminal is respectively 8,6,7,9, then according to below equation：
Wherein, v is the average of vertical angle of arrival；A is predetermined number, herein as 4；viTo select
Each user terminal vertical angle of arrival；According to can be calculated：
V=(8+6+7+9)/4=7.5
S302, the weights for calculating each bay of acquisition.
Carried out when calculating each bay weights according to below equation：
WM=e-j(M-1)2πΔsinv/λ
WMFor the weights of vertical bay of M；λ is wavelength；Δ is the spacing between bay.
The virtual multi-input, multi-output communication method that the present embodiment is provided is entered with reference to a specific example
Row is described in detail：
Assuming that communicated with base station one has eight user terminals, the numbering of user terminal is respectively 1-8,
The vertical angle of arrival of this eight user terminals is followed successively by -10,8,6, -5,1, -7,12, -9.Level is reached
Angle is followed successively by 20, -12,18,30,1, -33, -23, -40.
The vertical smaller horizontal angle of arrival of angle of arrival difference is selected to differ larger user terminal.If by first threshold
10 are set to, Second Threshold is set to 3, then the difference of the horizontal angle of arrival between any two user terminal
It should be greater than or equal to 10, the difference of vertical angle of arrival should be less than or equal to 3.Data are received according to previous frame
The factors such as the signal to noise ratio, Cyclic Redundancy Code, the noise size that are obtained after demodulation are it is determined that select how many users whole
End carries out virtual MIMO pairing, and determining the work of predetermined number can be completed by MAC layer.If it is determined that
Predetermined number is 2, then the user terminal that selection numbering is 2 and 3.
The vertical angle of arrival of user terminal 2 and user terminal 3 is respectively 8 and 6, and the average of vertical angle of arrival is
7.5, according to formula
WM=e-j(M-1)2πΔsinv/λ
The weights of each vertical antenna array element of base station side can be calculated, if base station side is provided with 4 vertically
Bay, then the weights of this 4 vertical antenna array elements are [1, e-2πjΔsin7.5/λ,e-4πjΔsin7.5/λ,
e-6πjΔsin7.5/λ]。
The user terminal 2 and 3 being selected has invented a multiple-input and multiple-output user terminal, and base station exists
During the subsequent communications of user terminal 2 and 3, the two user terminals can be regarded as to one and possess two
The virtual user terminal of root antenna, is only a running time-frequency resource of this virtual user terminal distribution, such
Way is conducive to resource distribution, improves the channel capacity of communication system.
When base station comprising the user terminal within the above-mentioned multiple-input and multiple-output user terminal fictionalized with carrying out
Communication, after bay receives a frame frequency numeric field data, base station utilizes each bay calculated
The frequency domain data that weights are received to each bay carries out vertical weighting processing, then by the frequency domain after processing
Data, which are done, to be merged, for example, 64 bays are merged into 16 bays, finally right in the horizontal direction
The frequency domain data that these user terminals are sent is demodulated.The method of demodulation generally comprise ZF (Zero-Forcing,
Squeeze theorem algorithm), SIC (Successive Interference Cancellation, serial interference elimination algorithm)
And MMSE (Minimum Mean Square Error, least-mean-square error algorithm) etc..
Embodiment two：
The present embodiment provides the virtual multi input in a kind of virtual mimo communication device, embodiment one
Multi output communication means can run on the virtual mimo communication device that the present embodiment is provided and use,
Incorporated by reference to Fig. 4, virtual mimo communication device 40 includes channel estimation module 401, user and selected
Module 402 and virtual communication module 403.Channel estimation module 401 obtains multiple and base station by pilot tone and carried out
The channel estimation of the user terminal of communication.User's selecting module 402 is used for according to preparatory condition from multiple and base
Stand and the user terminal of predetermined number is selected in the user terminal communicated.Virtual communication module 403 will be selected
The user terminal gone out invents a multiple-input and multiple-output user terminal, and based on MIMO technique with
The multiple-input and multiple-output user terminal is communicated.
In the present embodiment, communicated by being then based on MIMO technology, therefore user's selecting module 402
The user terminal at least two selected, that is to say, that predetermined number is more than or equal to 2.Originally it is being that embodiment is carried
In a kind of example supplied, as shown in figure 5, virtual mimo communication device 40 includes channel estimation mould
Beyond block 401, user's selecting module 402 and virtual communication module 403, in addition to number acquisition module 404,
Number acquisition module 404 is used to determine to need to select how many user terminals, number acquisition module 404 actually
When determining predetermined number, depending on current demodulated the first parameter for receiving signal in base station, for example base station is current
Demodulate a frame and receive SNR and CRC that signal draws the frame signal, then number acquisition module 404 is according to SNR
Determine that predetermined number is how many actually with CRC, at this moment the first parameter just includes SNR and CRC.This area
Technical staff is it is to be understood that number acquisition module 404 determines the first parameter of predetermined number institute foundation also
The parameter of other influences signal quality, the size of such as noise figure can be included.
Incorporated by reference to Fig. 6, Fig. 6 is a kind of schematic diagram of user's selecting module 402 in above-mentioned Fig. 4 or Fig. 5, is used
Family selecting module 402 includes angle calculation module 4021, difference calculating module 4022 and conditional filtering module
4023 and user's selecting module 4024.
Angle calculation module 4021 be used to determining the horizontal angle of arrival of user terminal respectively communicated with base station and
Vertical angle of arrival.It is determined that the mode of horizontal angle of arrival and vertical angle of arrival includes a variety of, wherein angle calculation
Module 4021 can obtain the channel estimation of each user terminal by pilot tone, then according to each user terminal
Channel estimation, estimate each user using batlett, capon, MUSIC or ESPRIT scheduling algorithm whole
The horizontal angle of arrival and vertical angle of arrival at end.
Difference calculating module 4022 calculates the difference and vertical angle of arrival of horizontal angle of arrival between each user terminal pair
Difference.Herein, a user terminal is constituted to the user terminal communicated by any two with base station,
That is, difference calculating module 4022 be substantially calculate any two user terminal between horizontal angle of arrival with
The difference of vertical angle of arrival.
Conditional filtering module 4023 is used for according to condition set in advance, is calculated from difference calculating module 4022
The difference that horizontal angle of arrival is filtered out in the result gone out is more than or equal to first threshold, and the difference of vertical angle of arrival
User terminal pair of the value less than or equal to Second Threshold.
Assuming that the vertical angle of arrival of user terminal n is vn, horizontal direction angle of arrival position hn, corresponding user terminal
M vertical angle of arrival is vm, horizontal direction angle of arrival is hm, then level is reached between user terminal n and m
Angle and vertical angle of arrival, which are necessarily required to meet following condition, just the qualification for carrying out virtual MIMO pairing：
|hm-hn| >=x, | vm-vn|≤y
Wherein x is first threshold, and y is Second Threshold, and first threshold and Second Threshold belong to critical value, when two
When the difference of horizontal angle of arrival is more than first threshold between individual user terminal, difference is bigger, then the communication after matching
Effect is better, if the difference of horizontal angle of arrival is less than first threshold, difference is smaller, and communicate effect after pairing
Fruit is poorer.When the difference of vertical angle of arrival between user terminal pair is more than Second Threshold, difference is bigger, communication
Effect is poorer, and when the difference of vertical angle of arrival between user terminal pair is less than Second Threshold, difference is smaller, leads to
Believe that effect is better.According to engineering experience, x is typically set to 10, y is set to 3 more properly, this
Art personnel it should be appreciated that above-mentioned numerical value simply determined according to practical experience, be not realize
The necessary choice of the present invention.
User's selecting module 4024 selects the user terminal of predetermined number from user terminal centering.User selects mould
Block 4024 needs, according to the predetermined number that determines is realized, to determine that the process of number of users can be with when being selected
Completed by the number acquisition module 404 in Fig. 5, it is notable that number acquisition module 404 determines pre-
As long as fixed number purpose process ensures to select the use of predetermined number from user terminal pair in user's selecting module 4024
Completed before the terminal of family, with angle calculation module 4021, difference calculating module 4022 and conditional filtering
Not strict sequential is limited between the corresponding flow that module 4023 is performed.
If the user terminal that what conditional filtering module 4023 was filtered out meet preparatory condition has 4, and number is obtained
Modulus block 404 is after the demodulated received signal of base station it is determined that it is current that two user terminals of selection, which carry out pairing,
What scene needed, then when user's selecting module 4024 selects two from this 4 user terminals, Ke Yiren
Meaning selection can also be selected according to other established principles.
After user's selecting module 4024 selects the user terminal of predetermined number from user terminal pair, by virtual
The user terminal selected is invented a multiple-input and multiple-output user terminal by communication module 403, and makes base
Stand and communicated based on MIMO technique with the multiple-input and multiple-output user terminal.
In a kind of preferred exemplary of the present embodiment, in order that base station and the multiple-input and multiple-output user fictionalized
Follow-up communication efficiency is more preferable between terminal, as shown in fig. 7, virtual mimo communication device 40 is also
Including weight computing module 405, weight computing module 405 is used for the weights for further calculating each bay.
For the set-up mode of user's selecting module 402, virtual communication module 403 and number acquisition module 404,
It refer to shown in above-mentioned example and Fig. 4-6, repeat no more here, with reference to Fig. 8 to the power in this example
The advantage and details of value computing module 405 are elaborated.
Weight computing module 405 includes mean value computation submodule 4051, and mean value computation submodule 4051 is based on
The average for the vertical angle of arrival of each user terminal selected, in addition, also including being used to calculate obtaining each antenna
The weight computing submodule 4052 of the weights of array element.
If the final choice of user's selecting module 402 has gone out A, B, C, D, tetra- user terminals carry out virtual MIMO
Pairing, the vertical angle of arrival of this four user terminals is respectively 8,6,7,9, then mean value computation submodule
4051 can calculate the vertical angle of arrival of each user terminal according to below equation：
Wherein, v is the average of vertical angle of arrival；A is predetermined number, herein as 4；viTo select
's.
It can be calculated：
V=(8+6+7+9)/4=7.5
When weight computing submodule 4052 calculates the weights of each bay, carried out according to below equation：
WM=e-j(M-1)2πΔsinv/λ
WMFor the weights of m-th vertical antenna array element；λ is wavelength；Δ is the spacing between bay.
The virtual mimo communication device 40 in Fig. 7 is done further with reference to a specific example
Explanation.
Assuming that communicated with base station one has eight user terminals, the numbering of user terminal is respectively 1-8,
The vertical angle of arrival of this eight user terminals is followed successively by -10,8,6, -5,1, -7,12, -9.Level is reached
Angle is followed successively by 20, -12,18,30,1, -33, -23, -40.
User's selecting module 402 selects the vertical smaller horizontal angle of arrival of angle of arrival difference to differ larger user's end
End.If first threshold is set into 10, Second Threshold is set to 3, then between any two user terminal
The difference of horizontal angle of arrival should be greater than or equal to 10, and the difference of vertical angle of arrival should be less than or equal to 3.Number
Acquisition module 404 receives signal to noise ratio, Cyclic Redundancy Code, the noise obtained after the demodulation of data according to previous frame
The factors such as size determine predetermined number it is determined that select how many user terminals to carry out virtual MIMO pairings
Work can also be completed by MAC layer.If number acquisition module 404 determines that predetermined number is 2, user
The user terminal that the selection numbering of selecting module 402 is 2 and 3.
During the vertical angle of arrival of user terminal 2 and user terminal 3 is respectively 8 and 6, weight computing module 405
Mean value computation submodule calculate between user terminal 2 and 3, the average of vertical angle of arrival is 7.5, weights
Calculating sub module is according to formula：
WM=e-j(M-1)2πΔsinv/λ
The weights of each vertical antenna array element of base station side can be calculated, if base station side is provided with 4 vertically
Bay, then the weights of this 4 vertical antenna array elements are [1, e-2πjΔsin7.5/λ,e-4πjΔsin7.5/λ,
e-6πjΔsin7.5/λ]。
It is many that the user terminal 2 and 3 being selected can be invented a multi input by virtual communication module 403
Export user terminal, make base station with the subsequent communications of user terminal 2 and 3 during, can be by the two
User terminal is regarded as a virtual user terminal for possessing two antennas, is only this virtual user terminal point
With a running time-frequency resource, such way is conducive to resource distribution, improves the channel capacity of communication system.
When base station comprising the user terminal within the above-mentioned multiple-input and multiple-output user terminal fictionalized with carrying out
Communication, after bay receives a frame frequency numeric field data, base station utilizes each bay calculated
The frequency domain data that weights are received to each bay carries out vertical weighting processing, then by the frequency domain after processing
Data, which are done, to be merged, for example, 64 bays are merged into 16 bays, finally right in the horizontal direction
The frequency domain data that these user terminals are sent is demodulated.The method of demodulation generally comprise ZF, SIC and
MMSE etc..
Embodiment three：
The present embodiment provides a kind of virtual multiple-input-multiple-output communication system, and the system includes multiple user terminals
And base station, set the virtual multiple-input and multiple-output of any one type provided in embodiment two to lead in a base station
T unit.
Obviously, those skilled in the art should be understood that each module or each step of the invention described above can be used
General computing device realizes that they can be concentrated on single computing device, or be distributed in multiple
On the network that computing device is constituted, alternatively, they can with computing device can perform program code come
Realize, it is thus possible to be stored in storage medium (ROM/RAM, magnetic disc, CD) by calculating
Device is performed, and in some cases, can be shown or described to be performed different from order herein
The step of, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them
Or step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hard
Part and software are combined.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to recognized
The specific implementation of the fixed present invention is confined to these explanations.For the ordinary skill of the technical field of the invention
For personnel, without departing from the inventive concept of the premise, some simple deduction or replace can also be made,
Protection scope of the present invention should be all considered as belonging to.
Claims (13)
1. a kind of virtual multi-input, multi-output communication method, it is characterised in that including：
Obtain the current channel estimation of multiple user terminals communicated with base station；
Select predetermined from each user terminal according to the channel estimation and preparatory condition of each user terminal
The user terminal of number, the user terminal of the predetermined number is at least two user terminals；
Each user terminal selected is invented into a multiple-input and multiple-output user terminal, and makes base station
Communicated based on MIMO technique with the multiple-input and multiple-output user terminal.
2. virtual multi-input, multi-output communication method as claimed in claim 1, it is characterised in that institute
Stating preparatory condition is：The difference of horizontal angle of arrival is more than or equal to first threshold between user terminal pair, and vertically
The difference of angle of arrival is less than or equal to Second Threshold；The user terminal including any two and base station to carrying out
The user terminal of communication.
3. virtual multi-input, multi-output communication method as claimed in claim 1, it is characterised in that root
Predetermined number is selected from each user terminal according to the channel estimation and preparatory condition of each user terminal
User terminal includes：
According to the horizontal angle of arrival of each user terminal of the channel estimation calculation of each user terminal with it is vertical
Angle of arrival；
Calculate the difference of the difference of horizontal angle of arrival and vertical angle of arrival between each user terminal pair；
Symbol is filtered out with the difference of vertical angle of arrival according to the difference of horizontal angle of arrival between each user terminal pair
Close the user terminal pair of the preparatory condition；
The user terminal of predetermined number is selected from the user terminal centering filtered out.
4. described virtual multi-input, multi-output communication method as claimed in claim 1, its feature exists
In the channel estimation and preparatory condition according to each user terminal is selected from each user terminal
Also include before the user terminal of predetermined number：
The predetermined number, first ginseng are determined according to the first parameter of the current demodulated receive information in base station
Number includes signal to noise ratio, CRC.
5. the virtual multi-input, multi-output communication method as described in claim any one of 1-4, its feature exists
In, it is described that the user terminal selected is invented into a multiple-input and multiple-output user terminal, and make base
Standing also includes meter before being communicated based on MIMO technique with the multiple-input and multiple-output user terminal
The weights of each bay are calculated, the weights are used between the base station and the multiple-input and multiple-output user terminal
Subsequent communications.
6. virtual multi-input, multi-output communication method as claimed in claim 5, it is characterised in that institute
State and calculate the weights of each bay and include：
The average for the vertical angle of arrival of each user terminal selected is calculated according to below equation：
<mrow>
<mi>v</mi>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mi>a</mi>
</mfrac>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>a</mi>
</munderover>
<msub>
<mi>v</mi>
<mi>i</mi>
</msub>
</mrow>
V is the average of vertical angle of arrival；A is the predetermined number；viFor each user terminal selected
Vertical angle of arrival；
The weights for obtaining each bay are calculated according to below equation：
WM=e-j(M-1）2πΔsinv/λ
WMFor the weights of m-th vertical antenna array element；λ is wavelength；Δ is the spacing between bay.
7. a kind of virtual mimo communication device, it is characterised in that including：
Channel estimation module, the channel estimation current for obtaining multiple user terminals communicated with base station；
User's selecting module, for the channel estimation and preparatory condition according to each user terminal from each described
The user terminal of predetermined number is selected in user terminal, the user terminal of the predetermined number is used at least two
Family terminal；
Virtual communication module, for each user terminal selected to be invented into a multiple-input and multiple-output
User terminal, and base station is based on MIMO technique and multiple-input and multiple-output user terminal progress
Communication.
8. virtual mimo communication device as claimed in claim 7, it is characterised in that institute
Stating preparatory condition is：The difference of horizontal angle of arrival is more than or equal to first threshold between user terminal pair, and vertically
The difference of angle of arrival is less than or equal to Second Threshold；The user terminal by any two and base station to being led to
The user terminal composition of letter.
9. virtual mimo communication device as claimed in claim 7, it is characterised in that institute
Stating user's selecting module includes：
Angle calculation module, for each user terminal of channel estimation calculation according to each user terminal
Horizontal angle of arrival and vertical angle of arrival；
Difference calculating module, difference and vertical angle of arrival for calculating horizontal angle of arrival between each user terminal pair
Difference；
Conditional filtering module, for being arrived according to the difference of horizontal angle of arrival between each user terminal pair with vertical
Difference up to angle filters out the user terminal pair for meeting the preparatory condition；
User's selecting module, it is whole for the user from the user terminal centering selection predetermined number filtered out
End.
10. virtual mimo communication device as claimed in claim 7, it is characterised in that also
Including：
Number acquisition module, in the channel estimation and preparatory condition according to each user terminal from each institute
Before stating the user terminal that predetermined number is selected in user terminal, according to the of the current demodulated receive information in base station
One parameter determines the predetermined number, and first parameter includes signal to noise ratio, CRC.
11. the virtual mimo communication device as described in claim any one of 7-10, its feature
It is, in addition to：
Weight computing module, for the user terminal selected to be invented into a multiple-input and multiple-output
User terminal, and base station is based on MIMO technique and multiple-input and multiple-output user terminal progress
Before communication, the weights of each bay are calculated, the weights are used for subsequent communications.
12. virtual mimo communication device as claimed in claim 11, it is characterised in that also
The weight computing module includes：
Mean value computation submodule, is vertically arrived for calculating each user terminal selected according to below equation
Up to the average at angle：
<mrow>
<mi>v</mi>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mi>a</mi>
</mfrac>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>a</mi>
</munderover>
<msub>
<mi>v</mi>
<mi>i</mi>
</msub>
</mrow>
V is the average of vertical angle of arrival；A is the predetermined number；viFor each user terminal selected
Vertical angle of arrival；
Weight computing submodule, the weights of each bay are obtained for being calculated according to below equation：
WM=e-j(M-1)2πΔsinv/λ
WMFor the weights of m-th vertical antenna array element；λ is wavelength；Δ is the spacing between bay.
13. a kind of virtual multiple-input-multiple-output communication system, it is characterised in that including multiple user terminals
And base station, the virtual multiple input multiple output communications as described in claim any one of 7-12 are included in the base station
Device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610225520.1A CN107302385B (en) | 2016-04-12 | 2016-04-12 | Virtual multiple-input multiple-output communication method, device and system |
| PCT/CN2017/073549 WO2017177757A1 (en) | 2016-04-12 | 2017-02-15 | Virtual multiple-input multiple-output communication method, apparatus and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610225520.1A CN107302385B (en) | 2016-04-12 | 2016-04-12 | Virtual multiple-input multiple-output communication method, device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107302385A true CN107302385A (en) | 2017-10-27 |
| CN107302385B CN107302385B (en) | 2021-04-16 |
Family
ID=60042306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610225520.1A Active CN107302385B (en) | 2016-04-12 | 2016-04-12 | Virtual multiple-input multiple-output communication method, device and system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107302385B (en) |
| WO (1) | WO2017177757A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020000138A1 (en) * | 2018-06-25 | 2020-01-02 | Nokia Shanghai Bell Co., Ltd. | User selection for mu-mimo communications |
| WO2021134622A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Wireless communication method and communication apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9967115B1 (en) | 2017-06-08 | 2018-05-08 | The Trustees Of Columbia University In The City Of New York | Circuits and methods for spatial equalization of in-band signals in MIMO receivers |
| CN114071489B (en) * | 2020-07-29 | 2024-11-08 | 中国移动通信有限公司研究院 | Communication node pairing method, device, communication node and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080049820A1 (en) * | 2006-08-22 | 2008-02-28 | Nortel Networks Limited | Multi-antenna scheduling system and method |
| CN101383645A (en) * | 2007-09-07 | 2009-03-11 | 中兴通讯股份有限公司 | Virtual MIMO matching method for uplink multiuser equipment |
| CN101568064A (en) * | 2008-04-25 | 2009-10-28 | 大唐移动通信设备有限公司 | Method and device for multi-user scheduling |
| CN103906252A (en) * | 2012-12-28 | 2014-07-02 | 华为技术有限公司 | Virtual multiple input and multiple output user pairing method and system and base station |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101374580B1 (en) * | 2007-07-23 | 2014-03-17 | 알까뗄 루슨트 | Power controlling method and corresponding base station |
| CN101340648B (en) * | 2008-08-11 | 2012-01-11 | 中兴通讯股份有限公司 | Generating method for multi-user beam shaping emission value |
| ES2614942T3 (en) * | 2010-10-11 | 2017-06-02 | Intel Corporation | Uplink noise estimation for a virtual MIMO system |
-
2016
- 2016-04-12 CN CN201610225520.1A patent/CN107302385B/en active Active
-
2017
- 2017-02-15 WO PCT/CN2017/073549 patent/WO2017177757A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080049820A1 (en) * | 2006-08-22 | 2008-02-28 | Nortel Networks Limited | Multi-antenna scheduling system and method |
| CN101383645A (en) * | 2007-09-07 | 2009-03-11 | 中兴通讯股份有限公司 | Virtual MIMO matching method for uplink multiuser equipment |
| CN101568064A (en) * | 2008-04-25 | 2009-10-28 | 大唐移动通信设备有限公司 | Method and device for multi-user scheduling |
| CN103906252A (en) * | 2012-12-28 | 2014-07-02 | 华为技术有限公司 | Virtual multiple input and multiple output user pairing method and system and base station |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020000138A1 (en) * | 2018-06-25 | 2020-01-02 | Nokia Shanghai Bell Co., Ltd. | User selection for mu-mimo communications |
| US11923925B2 (en) | 2018-06-25 | 2024-03-05 | Nokia Technologies Oy | User selection for MU-MIMO communications |
| WO2021134622A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Wireless communication method and communication apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107302385B (en) | 2021-04-16 |
| WO2017177757A1 (en) | 2017-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ngo et al. | The multicell multiuser MIMO uplink with very large antenna arrays and a finite-dimensional channel | |
| Cai et al. | Adaptive PSAM accounting for channel estimation and prediction errors | |
| CN107302385A (en) | Virtual multi-input, multi-output communication method, apparatus and system | |
| US20140334561A1 (en) | Method and System for Symbol Detection Using Matrix Decomposition | |
| EP3399660A1 (en) | Broadcast information transmission method and device | |
| CN104144039B (en) | Pilot distribution method based on coherence time in a kind of extensive mimo system | |
| CN102291842A (en) | Virtual MIMO pairing method taking user QoS into account | |
| Jamali et al. | A low-complexity recursive approach toward code-domain NOMA for massive communications | |
| CN109981151A (en) | Improved Gauss tree approximation message transmission detection algorithm in extensive mimo system | |
| CN101527589A (en) | Receiving antenna selection device for multiple-input and multiple-output wireless system and method thereof | |
| CN101964667B (en) | High-efficiency multi-antenna detection method for long term evolution scheme | |
| WO2016101647A1 (en) | Channel acquisition signal configuring and channel acquisition signal generating method and device | |
| CN107690180A (en) | Power distribution method and the base station using methods described | |
| CN103516447B (en) | A kind of multi-antenna signal merging method and network equipment | |
| CN106936484A (en) | A kind of uplink information feedback and downlink data transmission method and equipment | |
| CN107276733A (en) | A kind of method, base station and the terminal of determination DMRS port mapping | |
| CN105049384B (en) | For the channel estimation methods in uplink multi-users mimo system | |
| CN104539401A (en) | Self-adaption precoding method, base station and system | |
| Liu et al. | Non-asymptotic outage probability of large-scale MU-MIMO systems with linear receivers | |
| Kim et al. | Adaptive CSI feedback scheme to maximize the throughput in IEEE 802.11 ac system | |
| CN100373834C (en) | Method of channel estimate in telecommunication system | |
| CN106921990A (en) | A kind of analog channel measuring method and base station | |
| Mehlfuhrer et al. | MIMO HSDPA throughput measurement results in an urban scenario | |
| Li | Channel estimation and signal reconstruction for massive MIMO with non-orthogonal pilots | |
| CN104702325A (en) | MSE-based (mean square error-based) virtual MIMO (multiple input multiple output) user pairing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |