CN106105064B - The antenna calibration method used in extensive mimo wireless communication system and device - Google Patents
The antenna calibration method used in extensive mimo wireless communication system and device Download PDFInfo
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- CN106105064B CN106105064B CN201480077002.9A CN201480077002A CN106105064B CN 106105064 B CN106105064 B CN 106105064B CN 201480077002 A CN201480077002 A CN 201480077002A CN 106105064 B CN106105064 B CN 106105064B
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Abstract
The present invention relates to the methods that antenna calibration is used in the base station in extensive mimo wireless communication system, including the antenna system in base station is divided at least two antenna array modules, the first calibration antenna and at least one ordinary antennas associated there are respectively included at least two antenna array modules and the first calibration antenna is connected at least one ordinary antennas respectively by means of the first coupling circuit, calibrate to obtain the first calibration factor to calibrate at least one ordinary antennas associated there to implement the first stage；And the first calibration antenna progress second stage is calibrated to obtain the second calibration factor to calibrate the first calibration antenna.It is additionally related to antenna assembly.Method and apparatus according to the present invention calibrate antenna stage by stage, on the one hand the complexity of traditional self-alignment coupling circuit and the calibration pilot tone based on air interface transmission and feedback overhead are reduced, the modularized design and scalability of extensive antenna are on the other hand also effectively supported.
Description
Technical field
The present invention relates to wireless communication fields, make in extensive mimo wireless communication system more particularly, to one kind
Antenna calibration method and device.
Background technique
Due to smart phone, plate and need big data quantity application universal, mobile data services exponentially type
Increase, it is expected that the expection will increase by 18 times in next 5 years.In order to cope with such mobile data tsunami, operator
It will take measures to increase mobile network's capacity to a greater degree.A kind of possible measure is using large-scale mimo system
To realize the large capacity of the offer by the great spatial degrees of freedom of extensive MIMO.
The potential problem come with the extensive antenna disposed on base station includes a large amount of downlink pilot
Channel feedback expense in expense and uplink.Among time division multiplexing (TDD) system, channel reciprocity can be used to drop
It is low or avoid pilot tone and feedback overhead.But have a precondition for channel reciprocity, i.e., it should be appropriate
Antenna is calibrated to eliminate reciprocity error in ground, the reciprocity error usually by send and receive between radio-frequency unit not
With caused.
For antenna calibration, usually used technology includes self calibration and the calibration (OTA that eats dishes without rice or wine
Calibration).For method for self-calibrating, need to equip additional calibration antenna and in the calibration antenna and other common
Calibration coupling circuit are needed to configure between antenna, which is used to the other common antennas of calibration.And by
When OTA technology, downlink pilot, user estimate downlink channel status information (DL CSI) based on the received, then
By estimated downlink channel status information and uplink pilot (or or detectable signal), in single phase
Pass through in the dry time or uplink eat dishes without rice or wine to feed back to base station, later the base station will be extrapolated according to feedback obtained calibration because
Son.
For the TDD system using extensive MIMO, common self-calibrating solution or OTA is used to solve
Scheme will all have some problems and disadvantages.For example, when using self-alignment technical solution, (the example when antenna amount is very big
For example 128 or it is more), the coupling circuit between calibration antenna and ordinary antennas will be excessively complicated；And for
For OTA solution, descending pilot frequency expense and by user equipment (UE) feedback DL CSI feedback overhead may it is excessive to
Real system be difficult tolerance (such as base station side install 128 antennas, and user have an antenna, for each letter
The real and imaginary parts in road use 8 bit quantizations, then will be eated dishes without rice or wine by uplink must feed back 128*2*8=2048).
Summary of the invention
According to it is above-mentioned to background technique and understanding, disclosure of the invention is directed to a kind of new
Technical solution to solve the problems, such as the antenna calibration for extensive MIMO.
The first aspect of the present invention proposes in a kind of base station in extensive mimo wireless communication system for antenna
The method of calibration, comprising:
Antenna system in the base station is divided at least two antenna array modules, wherein at least two antenna
One first calibration antenna and at least one ordinary antennas associated there and described first are respectively included in array module
Calibration antenna is connected at least one described ordinary antennas respectively by means of the first coupling circuit, by first calibration day
Line calibrates to obtain the first calibration factor and calibrates at least one described ordinary antennas associated there to implement the first stage；With
And
Second stage is carried out to the first calibration antenna included by least two antenna array module and calibrates to obtain the
Two calibration factors calibrate antenna to calibrate described first.
The method carries out sublevel to the antenna in the base station in extensive mimo wireless communication system according to the present invention
On the one hand section calibration reduces the complexity of traditional self-alignment coupling circuit and calibration pilot tone based on air interface transmission and anti-
Expense is presented, the modularized design and scalability of extensive antenna are on the other hand also effectively supported.
Among a kind of form of implementation according to the present invention, the first stage is calibrated to self calibration.
Among a kind of form of implementation according to the present invention, it is described first calibration antenna by first coupling circuit to
Described at least one ordinary antennas sends the first calibrating sequence signal and by first coupling circuit from described at least one
A ordinary antennas receives the second calibrating sequence signal.Those skilled in the art is it is to be appreciated that the first calibrating sequence herein is believed
Number and the second calibrating sequence signal can for identical calibrating sequence signal also can be different calibrating sequence signals.
Among a kind of form of implementation according to the present invention, the base station further includes the second calibration antenna, wherein described
Two calibration antennas calibrate day with included by least two antenna array module first respectively by means of the second coupling circuit
Line is connected for implementing the second stage calibration by self calibration by the second calibration antenna, described at least with calibration
The first calibration antenna included by two antenna array modules.Since first stage calibration and second stage calibration are all made of
Self calibration rather than eat dishes without rice or wine to calibrate, so avoiding expense caused by the feedback by mouth sky, saved the communication resource；In addition,
Due to being calibrated stage by stage to antenna system, so the complexity of coupling circuit greatly reduces.
Among a kind of form of implementation according to the present invention, the quantity of the second calibration antenna is at least two and institute
Stating base station further includes third calibration antenna, and third calibration antenna is by means of third coupling circuit respectively at least two second
Calibration antenna is connected for implementing phase III calibration by self calibration by third calibration antenna, described extremely with calibration
Few two second calibration antennas.
Among a kind of form of implementation according to the present invention, the base station is communicated and described with a user equipment
First calibration antenna has the dual-mode antenna array module of physics, and the first calibration antenna is communicated with the user equipment with logical
It crosses and eats dishes without rice or wine calibration to implement second stage calibration to calibrate first school included by least two antenna array module
Quasi- antenna.
Among a kind of form of implementation according to the present invention, dual-mode antenna array module and the RF switch phase of the physics
Association, and the RF switch is configured in the dual-mode antenna battle array for implementing to disconnect the physics when first stage calibration
Column module and the dual-mode antenna array module that the physics is connected when implementing the second stage and calibrating.
Among a kind of form of implementation according to the present invention, the base station is communicated and described with a user equipment
First calibration antenna does not have the dual-mode antenna array module of physics, from included by least two antenna array module to
Select an ordinary antennas as the virtual calibration antenna of the antenna array module belonging to it in a few ordinary antennas respectively
And the base station port numbers of the virtual calibration antenna are sent to the user equipment to calibrate by eating dishes without rice or wine and
Corresponding conversion map combines it to calibrate with first calibration factor to obtain second calibration factor
State antenna system.
The advantages of this alternate embodiment is not needing additional coupling circuit and antenna, has on the one hand been convenient for day in this way
On the other hand the modularized design of linear system system increases the self-alignment precision of method used by first stage calibration.
Among a kind of form of implementation according to the present invention, there is identical quantity at least two antenna array module
Ordinary antennas.
Among a kind of form of implementation according to the present invention, the user equipment is in single relevant periods to institute
It states the downlink channel status information and uplink sounding information that base station feedback is estimated and the base station is based on being received
To downlink channel status information and the uplink channel state that is calculated by the uplink sounding information
Information obtains second calibration factor, and it is combined with first calibration factor to calibrate the antenna system.
In addition, the second aspect of the present invention is related to used in a kind of base station in extensive mimo wireless communication system
Antenna assembly comprising:
At least two antenna array modules, wherein respectively include one first at least two antenna array module
Antenna and at least one ordinary antennas associated there and the first calibration antenna are calibrated by means of the first coupling circuit
Be connected respectively at least one described ordinary antennas, with calibrated by the first calibration antenna it is associated there it is described extremely
A few ordinary antennas；
Second calibration antenna, wherein the second calibration antenna is by means of the second coupling circuit respectively with described at least two
First calibration antenna included by a antenna array module is connected, to calibrate described at least two by the second calibration antenna
First calibration antenna included by a antenna array module.
Described antenna assembly is varied slightly compared to its structure for traditional Anneta module according to the present invention, i.e., newly
Antenna assembly include the second coupling circuit and second calibration antenna, in this way convenient for second calibration antenna to first calibrate antenna
Carry out calibration operation.That is it is convenient for calibration operation stage by stage, first with the first calibration antenna to the first school
Ordinary antennas included in antenna array module belonging to quasi- antenna implements calibration, then again by the second calibration antenna to implementation
First stage calibration first calibration antenna calibrated, by two stage antenna calibration simplify single calibration operation and
Circuit complexity.
Among a kind of form of implementation according to the present invention, there is identical quantity at least two antenna array module
Ordinary antennas.It will be understood by those of skill in the art that the identical ordinary antennas of quantity herein is only one preferred
Embodiment, and not restrictive, that is to say, that quantity difference be also it is feasible, only say the antenna of the identical ordinary antennas of quantity
Array module is more convenient for the manufacture of large-scale modularization antenna.
Among a kind of form of implementation according to the present invention, the first calibration antenna is calibrated and its phase by self calibration
At least one associated described ordinary antennas and/or the second calibration antenna are calibrated described at least two days by self calibration
First calibration antenna included by linear array module.
Method and apparatus according to the present invention calibrate antenna stage by stage, on the one hand reduce traditional self-alignment
On the other hand the complexity of coupling circuit and calibration pilot tone and feedback overhead based on air interface transmission also effectively support extensive
The modularized design and scalability of antenna.
Detailed description of the invention
The following detailed description to non-limiting embodiment, other spies of the invention are read by referring to accompanying drawing
Sign, objects and advantages will become more apparent upon.
Fig. 1 is shown wherein can be in the implementation basis base station of the invention in extensive mimo wireless communication system
The schematic diagram 100 of the antenna assembly of method for first stage antenna calibration；
Fig. 2 shows the flow charts for the method that antenna calibration is used in the base station in extensive mimo wireless communication system
200；
Fig. 3 is shown for implementing in the base station in extensive mimo wireless communication system for second stage antenna school
The schematic diagram 300 of the first embodiment of the antenna assembly of quasi- method；
Fig. 4 is shown for implementing in the base station in extensive mimo wireless communication system for second stage antenna school
The schematic diagram 400 of the second embodiment of the antenna assembly of quasi- method；And
Fig. 5 is shown for implementing in the base station in extensive mimo wireless communication system for second stage antenna school
The schematic diagram 500 of the 3rd embodiment of the antenna assembly of quasi- method.
Run through different diagrams in the figure, same or similar appended drawing reference indicates the same or similar device (module)
Or step.
Specific embodiment
In the following detailed description of the preferred embodiment, reference is constituted to the appended attached drawing of present invention a part.Institute
Attached attached drawing, which has been illustrated by way of example, can be realized specific embodiment.Exemplary embodiment is not intended to
Exhaustive all embodiments according to the present invention.It is appreciated that without departing from the scope of the present invention, can use other
Embodiment can also carry out the modification of structure or logic.Therefore, it is below specific descriptions and it is unrestricted, and this
The range of invention is defined by the claims appended hereto.
Fig. 1 is shown wherein can be in the implementation basis base station of the invention in extensive mimo wireless communication system
The schematic diagram 100 of the antenna assembly of method for first stage antenna calibration.It can be seen from the figure that one kind is extensive
Antenna assembly 100 used in base station in mimo wireless communication system includes at least two antenna array modules, is herein day
Linear array module 110,120 and 130, wherein one is respectively included at least two antenna array modules 110,120 and 130
One calibration antenna 1110,1210 and 1310 and at least one ordinary antennas associated there 1111,1112 ..., 111M；
1211,1212 ..., 121M and 1311,1312 ..., 131M, and the first calibration antenna 1110,1210 and 1310 by means of
First coupling circuit 1120,1220 and 1320 respectively at least one ordinary antennas 1111,1112 ..., 111M；1211,
1212 ..., 121M and 1311,1312 ..., 131M be connected, to be calibrated by the first calibration antenna 1110,1210 and 1310
At least one ordinary antennas associated there 1111,1112 ..., 111M；1211,1212 ..., 121M and 1311,
1312、...、131M。
It can also be said that according to the present invention in the base station in extensive mimo wireless communication system for antenna calibration
The antenna array module for modularly designing and manufacturing is grouped by method naturally first when implementing, such as in Fig. 1
In antenna array module 110,120 and 130 separately manufactured, needing to be installed on a common base station
When, antenna array module 110,120 and 130 is respectively an antenna array module, and when implementing antenna calibration, sharp first
With the first calibration antenna 1110,1210 and 1310 carried in each antenna array module 110,120 and 130 by means of the first coupling
Close circuit 1120,1220 and 1320 come self calibration at least one ordinary antennas associated there 1111,1112 ..., 111M；
1211,1212 ..., 121M and 1311,1312 ..., 131M.This is the first stage calibration mentioned in the present invention.
More specifically, in Fig. 1, from common antenna element 1111,1112 ..., 111M；1211,1212,...,
121M and 1311,1312 ..., 131M respectively to i-th group (i=1,2 ..., N) first calibrate antenna 1110,1210 and
1310 compound channel can be expressed in the case where considering the TX/RX radio frequency factor by following formula, it may be assumed that
Wherein, aI, jAnd bI, jRespectively indicate j-th of antenna element of i-th of antenna array module the reception radio frequency factor and
The transmission radio frequency factor, and H1xM (i)It indicates in the general of the first calibration antenna 1110,1210 and 1310 and i-th antenna array module
Logical antenna element 1111,1112 ..., 111M；1211,1212 ..., 121M and 1311,1312 ..., the letter between 131M
Road vector (not including receiving the radio frequency factor and the transmission radio frequency factor).
Similarly, from i-th group (i=1,2 ..., N) of the first calibration antenna 1110,1210 and 1310 to common antenna
Element 1111,1112 ..., 111M；1211,1212 ..., 121M and 1311,1312 ..., the compound channel of 131M can be by
Following formula is expressed, it may be assumed that
Because of the H in formula (1) and formula (2)1xM (i)It is equal, so can obtain:
And
Wherein, eI, j=bI, j/aI, jExpression is sending and receiving the reciprocity error between the radio circuit factor.
By formula (4) it is found that if standardizing the reciprocity error of ordinary antennas by the reciprocity error of calibration antenna
It is known, then downlink channel can be obtained according to uplink channel.In fact, it is possible to meet letter by two
The dot product in road simply estimates the normalised reciprocity error of common element, i.e., as shown by the following formula as:
From formula (5) as can be seen that can only learn the opposite reciprocity error of ordinary antennas element in self-calibration phase,
Without learning accurate absolutely reciprocity error amount.
Next it will be described to be used for antenna calibration in the base station in extensive mimo wireless communication system by means of Fig. 2
Method flow chart 200.It can be seen from the figure that this method 200 includes at least two steps, i.e., first in step 210,
Antenna system in base station is divided at least two antenna array modules, i.e. antenna array module 110,120 and 130 in Fig. 1,
Wherein, one first calibration antenna 1110,1210,1310 is respectively included at least two antenna array modules 110,120 and 130
With at least one ordinary antennas associated there 1111,1112 ..., 111M；1211,1212 ..., 121M and 1311,
1312 ..., 131M and this first calibration antenna 1110,1210,1310 by means of the first coupling circuit 1120,1220,1320
Respectively at least one ordinary antennas 1111,1112 ..., 111M；1211,1212 ..., 121M and 1311,1312 ...,
131M is connected, and calibrates to obtain the first calibration factor to implement the first stage by the first calibration antenna 1110,1210,1310
Calibrate at least one ordinary antennas associated there 1111,1112 ..., 111M；1211,1212 ..., 121M and 1311,
1312,...,131M.Next, in step 210 to included by least two antenna array modules 110,120 and 130
One calibration antenna 1110,1210,1310 carries out second stage and calibrates to obtain the second calibration factor to calibrate the first calibration antenna
1110、1210、1310。
First stage is calibrated to self calibration.First calibration antenna 1110,1210,1310 passes through first coupling circuit
1120,1220,1320 at least one ordinary antennas 1111,1112 ..., 111M；1211,1212 ..., 121M and 1311,
1312 ..., 131M sends the first calibrating sequence signal and passes through the first coupling circuit 1120,1220,1320 from least one
Ordinary antennas 1111,1112 ..., 111M；1211,1212 ..., 121M and 1311,1312 ..., 131M receive the second calibration
Sequence signal.The calibration of first stage is described in detail in description referring to Fig.1, will introduce second stage below
Calibration method.
Optionally, base station further includes the second calibration antenna.It is described hereinafter with reference to Fig. 3 for implementing in extensive MIMO
Schematic diagram 300 in base station in wireless communication system for the first embodiment of the antenna assembly of the method for antenna calibration.From
In figure as can be seen that second calibration antenna 320 by means of the second coupling circuit 310 respectively at least two antenna array modules
110, the first calibration antenna 1110,1210,1310 included by 120 and 130 is connected for being passed through by the second calibration antenna 320
Self calibration implements second stage calibration, to calibrate the first school included by least two antenna array modules 110,120 and 130
Quasi- antenna 1110,1210,1310.It will be understood by those of skill in the art that the two stages calibration at this also can be implemented as three
Stage or more multistage calibration will calibrate phase in, then each fall within this hair without departing from design of the invention
Within bright protection scope.Such as among a kind of form of implementation according to the present invention, the quantity of the second calibration antenna is at least
Two and base station further include third calibration antenna (not shown), which calibrates antenna by means of third coupling circuit point
It is not connected for implementing phase III calibration by self calibration by third calibration antenna at least two second calibration antennas,
To calibrate at least two second calibrations antenna.
Self-alignment calibration process with the second calibration antenna is described below with reference to specific formula.With the first rank
The principle of section calibration is the same, can be derived that following relationship, it may be assumed that
Wherein, HcIndicate the compound channel and e between the second calibration antenna and the first calibration antennacIndicate the second school
The reciprocity error and e of quasi- antennaI, 0(i=1,2 ..., N) indicate first calibration antenna reciprocity error.
It can be derived that from formula (6):
Then, it can be derived that according to formula (5) and (7):
Thus the matrix for having obtained global reciprocity error, thus just to entire antenna system can calibrate.
It since first stage calibration and second stage calibration are all made of self calibration rather than eats dishes without rice or wine to calibrate, pass through so avoiding
Expense caused by the empty feedback of mouth, has saved the communication resource；Further, since antenna system is calibrated stage by stage, so
The complexity of coupling circuit greatly reduces.
But self calibration especially second stage self calibration compromises the theory of antenna array moduleization design, so can
Selection of land also can implement second stage calibration by eating dishes without rice or wine calibration.Specifically, Fig. 4 is shown for implementing in extensive MIMO
Schematic diagram 400 in base station in wireless communication system for the second embodiment of the antenna assembly of the method for antenna calibration.From
In figure as can be seen that base station can be communicated with a user equipment 440 and the first calibration antenna 1110,1210,1310
It is respectively provided with the dual-mode antenna array module 410,420 and 430 of physics, the first calibration antenna 1110,1210,1310 and user
The communication of equipment 440 determines 110,120 to implement second stage calibration by eating dishes without rice or wine calibration to calibrate at least two aerial array moulds
With 130 included by first calibration antenna 1110,1210,1310.Wherein, the dual-mode antenna array module 410 of physics, 420 and
430 can be associated with a RF switch (not shown), and the RF switch is configured to implementing the first stage
The dual-mode antenna array module (dual-mode antenna for deactivating the physics) of physics is disconnected when calibration and is implementing second stage
The dual-mode antenna array module (dual-mode antenna for activating the physics) of physics is connected when calibration.In this way reducing or
The dual-mode antenna of the physics is on eating dishes without rice or wine for the first stage of other common antennas when person eliminates calibration in the first stage
The adverse effect of calibration.And the dual-mode antenna of the physics is activated when second stage is calibrated to and eats dishes without rice or wine to calibrate so that this
Communication between one calibration antenna 410,420 and 430 and user equipment 440 is possibly realized, and then realizes second stage calibration.
Optionally, it is also possible that base station is communicated with a user equipment 440 and those the first calibration antennas
1110,1210, the 1310 dual-mode antenna array module 410,420 and 430 for not having physics, as shown in figure 5, Fig. 5 shows use
It is real in the third for implementing the antenna assembly in the base station in extensive mimo wireless communication system for the method for antenna calibration
Apply the schematic diagram 500 of example.It can be seen from the figure that included by least two antenna array module 110,120 and 130 at least
One ordinary antennas 1111,1112 ..., 111M；1211,1212 ..., 121M and 1311,1312 ..., select in 131M respectively
Select an ordinary antennas as the antenna array module belonging to it virtual calibration antenna (it is shown in Fig. 5 go out example in point
Not Wei 1112,1212,1312) and the port numbers of virtual calibration antenna are sent to user equipment 440 to pass through by the base station
It eats dishes without rice or wine to calibrate and corresponding conversion map is to obtain the second calibration factor, and it is combined with the first calibration factor with school
Quasi- antenna system 100.Wherein, the selection of the virtual calibration antenna in Fig. 5 is only exemplary, also can be according to practical feelings
Condition arbitrarily selects, as long as configuring corresponding conversion map is just able to achieve second stage calibration.In a kind of reality according to the present invention
It applies among form, with the ordinary antennas of identical quantity at least two antenna array modules.Those skilled in the art should
Understand, also can include the antenna of different number, to form antenna using different manufacturers antenna array module produced
Array is communicated.
Specifically, which will introduce second stage calibration, and user equipment divides in single relevant periods
The downlink channel status information and uplink sounding signal of estimation are not fed back.Based on the received downlink channel shape of institute
State information and estimated uplink channel state information (being based on uplink detection signal), base station can derive second stage
Calibration factor and then with come self-virtualizing calibration antenna and it is actual first calibration antenna between specific conversion map
And the final complete calibration factor in the place of shifting onto is combined in the obtained relative calibration factor of the first calibration phase.Next
Relevant calibrating principle will be introduced.
The following formula can be obtained using principle used in formula (1) to (5), it may be assumed that
Wherein, HvcCompound channel of the expression between user equipment antenna and the virtual calibration antenna of first stage is (herein
Assuming that the first ordinary antennas element in each antenna array module is virtual calibration antenna), evcIndicate user equipment antenna
Reciprocity error and eI, 1, i=1,2 ..., N indicate the reciprocity error of virtual calibration antenna.
From formula (9) it follows that
It can be derived that based on formula (5) and (10):
Wherein, first matrix on the left side of formula (11) comes from formula (10), and second matrix is from formula (5)
The first row of third matrix.From formula (11) it can be seen that having finally obtained the global reciprocity sex factor completed.
The advantages of this alternate embodiment is not needing additional coupling circuit and antenna, has on the one hand been convenient for day in this way
On the other hand the modularized design of linear system system increases the self-alignment precision of method used by first stage calibration.
Among a kind of form of implementation according to the present invention, the user equipment 440 in single relevant periods to
The downlink channel status information of base station feedback estimation and uplink sounding information and base station are based under received
It downlink channel state information and is obtained by the uplink channel state information that the uplink sounding information is calculated
Second calibration factor out, and it is combined with the first calibration factor to calibrate antenna system 100.
In addition, the antenna assembly further includes the second calibration antenna, wherein the second calibration antenna is by means of the second coupling
Circuit is connected with the first calibration antenna included by least two antenna array module respectively, to be calibrated by described second
Antenna calibrates included by least two antenna array module the first calibration antenna.
Among a kind of form of implementation according to the present invention, there is identical quantity at least two antenna array module
Ordinary antennas.
Among a kind of form of implementation according to the present invention, the first calibration antenna is calibrated and its phase by self calibration
At least one associated ordinary antennas and/or the second calibration antenna calibrate at least two aerial arrays mould by self calibration
First calibration antenna included by block.
Method and apparatus according to the present invention calibrate antenna stage by stage, on the one hand reduce traditional self-alignment
On the other hand the complexity of coupling circuit also reduces the complexity of calibration and improves calibration accuracy.
Run through different diagrams in the figure, same or similar appended drawing reference indicates the same or similar device (module)
Or step.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
How from the point of view of, the present embodiments are to be considered as illustrative and not restrictive.In addition, it will be evident that one word of " comprising " not
Exclude other elements and steps, and wording "one" be not excluded for plural number.The multiple element stated in device claim can also
To be implemented by one element.The first, the second equal words are used to indicate names, and are not indicated any particular order.
Claims (13)
1. being used for the method for antenna calibration in a kind of base station in extensive mimo wireless communication system, comprising:
Antenna system in the base station is divided at least two antenna array modules, wherein at least two aerial array
One first calibration antenna and at least one ordinary antennas associated there, and first calibration are respectively included in module
Antenna is connected at least one described ordinary antennas respectively by means of the first coupling circuit, with real by the first calibration antenna
It applies the first stage to calibrate to obtain the first calibration factor, to calibrate, associated with the first calibration antenna described at least one is general
Exceedingly high line；And
Second stage is carried out to the first calibration antenna included by least two antenna array module to calibrate to obtain the second school
Quasi-divisor, to calibrate the first calibration antenna.
2. according to the method described in claim 1, wherein, the first stage is calibrated to self calibration.
3. according to the method described in claim 2, wherein, the first calibration antenna is by first coupling circuit to described
At least one ordinary antennas sends the first calibrating sequence signal, and at least one is general from described by first coupling circuit
Exceedingly high line receives the second calibrating sequence signal.
4. method according to claim 1 or 2, wherein the base station further includes the second calibration antenna, wherein described
Two calibration antennas calibrate day with included by least two antenna array module first respectively by means of the second coupling circuit
Line is connected, and calibrates to implement the second stage by self calibration by the second calibration antenna, described extremely with calibration
The first calibration antenna included by few two antenna array modules.
5. according to the method described in claim 4, wherein, the quantity of the second calibration antenna is at least two, and described
Base station further includes third calibration antenna, third calibration antenna by means of third coupling circuit respectively at least two second schools
Quasi- antenna is connected, described extremely with calibration to implement phase III calibration by self calibration by third calibration antenna
Few two second calibration antennas.
6. method according to claim 1 or 2, wherein the base station is communicated with a user equipment, and described
First calibration antenna has the dual-mode antenna array module of physics, and the first calibration antenna is communicated with the user equipment with logical
It crosses and eats dishes without rice or wine calibration to implement second stage calibration, to calibrate described the included by least two antenna array module
One calibration antenna.
7. according to the method described in claim 6, wherein, the dual-mode antenna array module of the physics is related to RF switch
Connection, and the RF switch is configured in the dual-mode antenna array for implementing to disconnect the physics when first stage calibration
Module, and in the dual-mode antenna array module for implementing to connect the physics when second stage calibration.
8. method according to claim 1 or 2, wherein the base station is communicated with a user equipment, and described
First calibration antenna does not have the dual-mode antenna array module of physics, from included by least two antenna array module to
Select an ordinary antennas as the virtual calibration antenna of the antenna array module belonging to it in a few ordinary antennas respectively,
And the port numbers of the virtual calibration antenna are sent to the user equipment by the base station, to be calibrated by eating dishes without rice or wine and
Corresponding conversion map obtains second calibration factor, and by second calibration factor and first calibration factor
It combines to calibrate the antenna system.
9. according to the method described in claim 1, wherein, there is the general of identical quantity at least two antenna array module
Exceedingly high line.
10. according to the method described in claim 1, wherein, the user equipment is in single relevant periods to described
The downlink channel status information and uplink sounding information of base station feedback estimation, and the base station is based on received
Downlink channel status information and the uplink channel state that is calculated by the uplink sounding information believe
Breath obtains second calibration factor, and second calibration factor is combined with first calibration factor to calibrate
State antenna system.
11. antenna assembly used in a kind of base station in extensive mimo wireless communication system, comprising:
At least two antenna array modules, wherein one first calibration is respectively included at least two antenna array module
Antenna and at least one ordinary antennas associated there, and the first calibration antenna is distinguished by means of the first coupling circuit
It is connected at least one described ordinary antennas, it is related to the first calibration antenna to be calibrated by the first calibration antenna
At least one described ordinary antennas of connection；
Second calibration antenna, wherein it is described second calibration antenna by means of the second coupling circuit respectively with described at least two days
First calibration antenna included by linear array module is connected, to be calibrated described at least two days by the second calibration antenna
First calibration antenna included by linear array module.
12. antenna assembly according to claim 11, which is characterized in that have at least two antenna array module
The ordinary antennas of identical quantity.
13. antenna assembly according to claim 11, which is characterized in that the first calibration antenna is by self calibration come school
Quasi- at least one described ordinary antennas associated there and/or the second calibration antenna are calibrated described by self calibration
The first calibration antenna included by least two antenna array modules.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/079814 WO2015188365A1 (en) | 2014-06-13 | 2014-06-13 | Antenna calibration method and device used in large-scale mimo wireless communication system |
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| Publication Number | Publication Date |
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| CN106105064A CN106105064A (en) | 2016-11-09 |
| CN106105064B true CN106105064B (en) | 2019-05-10 |
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| WO (1) | WO2015188365A1 (en) |
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|---|---|---|---|---|
| CN108234001A (en) * | 2016-12-14 | 2018-06-29 | 中国电信股份有限公司 | Extensive antenna equipment and extensive antenna equipment data transmission method |
| CN108155958A (en) * | 2017-11-22 | 2018-06-12 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Extensive mimo antenna array far field calibration system |
| CN109450563B (en) * | 2018-10-16 | 2021-04-30 | 电子科技大学 | WiFi chip phase offset correction method |
| CN111130661B (en) * | 2018-10-31 | 2021-08-31 | 华为技术有限公司 | Antenna calibration method and device |
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| WO2015188365A1 (en) | 2015-12-17 |
| CN106105064A (en) | 2016-11-09 |
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