CN102291189B - Antenna calibration method and equipment - Google Patents
Antenna calibration method and equipment Download PDFInfo
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- CN102291189B CN102291189B CN201110231311.5A CN201110231311A CN102291189B CN 102291189 B CN102291189 B CN 102291189B CN 201110231311 A CN201110231311 A CN 201110231311A CN 102291189 B CN102291189 B CN 102291189B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
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Abstract
The embodiment of the invention discloses a kind of antenna calibration method and equipment, by applying the technical scheme of the embodiment of the present invention, calibration pilot tone is sent to terminal equipment by base station, channel measurement and the information feed back of antenna calibration is carried out according to this calibration pilot tone to make terminal equipment, by such process, make terminal equipment can according to the pilot signal meeting multiple antennas scene needs, base station is coordinated to carry out antenna calibration, when up-downgoing reciprocity is not strictly set up, antenna calibration can be realized accurately.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of antenna calibration method and equipment.
Background technology
MIMO(Multiple-InputMultiple-Output, multiple-input and multiple-output) system refers to the system that many antennas are all housed at transmitting terminal and receiving terminal.Mimo system adds the process in spatial domain on the basis of traditional time frequency processing, can obtain ARRAY PROCESSING gain and diversity gain further.In mimo system, if transmitter can know channel information in some way, just can be optimized transmission signal according to the characteristic of channel, to improve the quality of reception and to reduce the requirement to Receiver Complexity.Linear predictive coding/beamforming technique is exactly wherein a kind of optimization method, is antagonism fading channel, reduces error probability, improve the effective means of systematic function.
In multiple antennas linear predictive coding/beamforming transmission technology, base station to UE(UserEquipment, subscriber equipment, i.e. terminal equipment) channel information be a key factor of influential system performance.FDD(FrequencyDivisionDuplexing, Frequency Division Duplexing (FDD)) in system, by up channel, UE will estimate that the feedback of channel information obtained is to base station, occupies a large amount of uplink channel resources, and can introduce quantization error etc.At TDD(TimeDivisionDuplexing, time division duplex) in system, the signal of uplink and downlink sends in identical frequency range, and therefore the reciprocity of up-downgoing channel is set up.
So-called reciprocity refers to that up channel is identical with down channel.The upward signal utilizing up-downgoing channel reciprocity can be sent by UE estimates up channel, thus obtains descending channel information, eliminates a large amount of feedback overheads.
The reciprocity of channel is set up the physical channel of spatial.Signal will be transported to antenna through radiating circuit after Base-Band Processing completes, and also will be transported to base band through receiving circuit from the signal that antenna receives.In general, radiating circuit and receiving circuit are two different circuit, therefore by radiating circuit and the time delay that receiving circuit is introduced and amplitude gain not identical, that is transmission circuit does not mate.Radiating circuit and not mating of receiving circuit, cause up-downgoing channel reciprocity strictly not set up.
If up-downgoing circuit does not mate, when especially time delay is different, then cannot ensures the signal in-phase stacking of each antenna, the signal to noise ratio of Received signal strength be reduced, causes penalty.
It is a kind of that to offset the method that up-downgoing circuit do not mate the impact caused be carry out antenna calibration: the information reported according to UE and/or base station measurement to information calculate calibration factor, adjustment is compensated to the channel estimated by upward signal, or compensates adjustment to sent data.
On the other hand, coordinated multipoint transmission (CoordinatedMulti-Point, CoMP) technology is the cooperation between multiple transfer points that geographical position is separated.Multiple transfer point is multiple transfer points of the base station of different districts or the separation of an Intra-cell.The cooperation transmission that coordinated multipoint transmission technical point is descending and up combine reception.Descending coordinated multipoint transmission technical scheme is mainly divided into two classes: cooperative scheduling and combine transmission.
Cooperative scheduling be by community between time, frequency and space resources coordination, avoid or reduce interference each other.The interference of minizone is the principal element of restriction cell edge UE performance, and therefore cooperative scheduling is by reducing the interference of minizone, can improve the performance of cell edge UE.As shown in Figure 1, by the cooperative scheduling of 3 communities, three UE that may mutually disturb scheduled in mutually orthogonal resource and (represent different resources with different colors), effectively avoid the interference between community.
In associating delivery plan, multiple community sends data, to strengthen UE Received signal strength to UE simultaneously.As shown in Figure 2, three communities send data to a UE on the same resource, and UE receives the signal of multiple community simultaneously.On the one hand, the useful signal superposition from multiple community can promote the signal quality that UE receives, and on the other hand, reduces the interference that UE is subject to, thus improves systematic function.
Be similar to single-point (single community) multi-antenna transmitting transmission scheme, whether coordinated multipoint transmission technology can effectively be implemented to depend on the obtainable channel condition information of transmitting terminal.After transmitting terminal obtains desirable channel condition information, can signal quality be improved by linear predictive coding (wave beam forming) technology and suppress user's interference.Transmitting terminal can obtain channel condition information by the feedback of terminal, but feedback channel can take valuable uplink frequency spectrum resource, thus reduces up spectrum efficiency.This point is particularly evident in coordinated multipoint transmission, and each community (transfer point) participating in cooperation transmission needs the channel condition information acquiring terminal, and therefore its feedback overhead linearly increases along with the number of cooperation point.Consider concrete transmission plan, also may be higher to channel condition information permissible accuracy, this just means and takies more uplink bandwidth resource.This very nervous uplink transmission resource now seems awkward more.Meanwhile, because the capacity constraint of up channel, inevitably there is quantization error in the channel condition information of feedback.Quantization error then can reduce the performance of coordinated multipoint transmission.Utilizing channel reciprocity to obtain channel condition information in TDD system and can not bring extra feedback overhead, and there is not the quantization error introduced because of feedback, is very competitive solution.
Realizing in process of the present invention, inventor finds at least there is following problem in prior art:
Utilize the CoMP scheme of channel reciprocity to be faced with the requirement of antenna calibration equally, the air interface calibration that foregoing terminal participates in needs the pilot signal of up-downgoing.
Uplink pilot signal SRS(SoundingReferenceSignal, detection reference signal).And down-bound pilot frequency signal has CSI-RS(ChannelStateInformationReferenceSignal, channel state information reference signals), CRS(Cell-specificReferenceSignal, cell special reference), DMRS(DemodulationReferenceSignal, demodulated reference signal) and PRS(PositioningReferenceSignals, location reference signals) etc. can select, but, DM-RS is not that full bandwidth sends, and live through precoding, be not suitable for calibration, CRS sends at full bandwidth, there is no precoding, may be used for calibration, but the trend considering standard evolution is the effect weakening CRS gradually, in addition, CRS is likely the virtualized result of antenna, therefore be also not suitable for calibrating with CRS, the frequency domain density ratio of CSI-RS is lower, be difficult to the precision of channel estimation reached needed for calibration, the density of PRS is enough high, but do not distinguish multi-antenna port, be not suitable for calibration measurement.
Thus, can find out, under coordinated multipoint transmission scene, prior art unsuitable solution for antenna calibration.
Summary of the invention
The embodiment of the present invention provides a kind of antenna calibration method and equipment, solves in existing technical scheme, when up-downgoing reciprocity is not strictly set up, accurately can not realize the problem of antenna calibration.
For achieving the above object, the embodiment of the present invention provides a kind of antenna calibration method on the one hand, at least comprises the following steps:
Base station sends calibration pilot tone to terminal equipment;
Described base station receives the calibration parameter that described terminal equipment returns, described calibration parameter for the down channel measurement result in described terminal equipment scope corresponding to described calibration pilot tone determined;
The uplink pilot signal determination calibration factor that described base station sends according to described calibration parameter and described terminal equipment, and carry out antenna calibration according to described calibration factor.
On the other hand, the embodiment of the present invention additionally provides a kind of base station, at least comprises:
Sending module, for sending calibration pilot tone to terminal equipment;
Receiver module, for receiving the calibration parameter that described terminal equipment returns, the down channel measurement result in scope corresponding to the calibration pilot tone that described calibration parameter sends according to described sending module for described terminal equipment is determined;
Determination module, for the uplink pilot signal determination calibration factor that the calibration parameter received by described receiver module and described terminal equipment send, and carries out antenna calibration according to described calibration factor.
On the other hand, the embodiment of the present invention additionally provides a kind of antenna calibration method, at least comprises the following steps:
Terminal equipment receives the calibration pilot tone that base station sends;
Described terminal equipment is measured down channel according to described calibration pilot tone, and according to corresponding measurement result determination calibration parameter;
Described terminal equipment sends described calibration parameter and uplink pilot signal to described base station, to make described base station determine corresponding calibration factor, and carries out antenna calibration according to calibration factor.
On the other hand, the embodiment of the present invention additionally provides a kind of terminal equipment, at least comprises:
Receiver module, for receiving the calibration pilot tone that base station sends;
Determination module, measures down channel for the calibration pilot tone received by described receiver module, and according to corresponding measurement result determination calibration parameter;
Sending module, for sending described calibration parameter and uplink pilot signal to described base station, to make described base station determine corresponding calibration factor, and carries out antenna calibration according to calibration factor.
Compared with prior art, the technical scheme that the embodiment of the present invention proposes has the following advantages:
By applying the technical scheme of the embodiment of the present invention, calibration pilot tone is sent to terminal equipment by base station, channel measurement and the information feed back of antenna calibration is carried out according to this calibration pilot tone to make terminal equipment, by such process, make terminal equipment can according to the pilot signal meeting multiple antennas scene needs, base station is coordinated to carry out antenna calibration, even if when up-downgoing reciprocity is not strictly set up, also antenna calibration can be realized accurately.
Accompanying drawing explanation
Fig. 1 is the scene schematic diagram of cooperative scheduling scheme of the prior art;
Fig. 2 is the enforcement scene schematic diagram of associating delivery plan of the prior art;
The schematic flow sheet of a kind of antenna calibration method that Fig. 3 proposes for the embodiment of the present invention;
The schematic flow sheet of the antenna calibration method in a kind of concrete scene that Fig. 4 proposes for the embodiment of the present invention;
A kind of schematic diagram calibrating pilot tone that Fig. 5 proposes for the embodiment of the present invention;
The schematic flow sheet of the antenna calibration method in a kind of concrete scene that Fig. 6 proposes for the embodiment of the present invention;
The schematic flow sheet of the antenna calibration method in a kind of concrete scene that Fig. 7 proposes for the embodiment of the present invention;
The schematic flow sheet of the antenna calibration method in a kind of concrete scene that Fig. 8 proposes for the embodiment of the present invention;
The schematic flow sheet of the antenna calibration method in a kind of concrete scene that Fig. 9 proposes for the embodiment of the present invention;
Figure 10 is the structural representation of a kind of base station that the embodiment of the present invention proposes;
Figure 11 is the structural representation of a kind of terminal equipment that the embodiment of the present invention proposes.
Embodiment
As stated in the Background Art, multi-antenna technology is one of key technology becoming Next-Generation Wireless Communication Systems, and the linear predictive coding/beamforming technique in multi-antenna technology is antagonism fading channel, reduces error probability, improves the effective means of systematic function.
TDD system utilizes the reciprocity of up-downgoing channel, and the UE estimated according to base station can obtain the descending channel information of base station to UE to the uplink channel information of base station, thus calculates pre-coding matrix/beam shape-endowing weight value.But up-downgoing reciprocity is not strictly set up in real system, this have impact on realization accurate between antenna.
In order to overcome such defect, the embodiment of the present invention proposes a kind of antenna calibration method, the special calibration pilot tone sent according to base station by terminal equipment carries out corresponding channel measurement and information feed back, then antenna calibration is carried out accordingly in base station, thus, ensure that the smooth realization of antenna calibration under multiple antennas scene.
As shown in Figure 3, be the schematic flow sheet of a kind of antenna calibration method that the embodiment of the present invention proposes, the method specifically comprises the following steps:
Step S301, base station send calibration pilot tone to terminal equipment.
Before this step, also comprise the selection course of the terminal equipment participating in calibration, be described as follows:
First, described base station receives the ability information of self that described terminal equipment reports, and certainly, in the processing procedure of reality, the ability information that base station can receive multiple terminal equipment reports, and participates in the terminal equipment of calibration according to these Information Selection.
When described base station is according to the ability information of each terminal equipment received, when determining that described terminal equipment participates in calibration, base station sends to the selected terminal equipment participating in calibration and confirms that described terminal equipment participates in the notification message of calibration.
On the other hand, the calibration pilot tone receiving base station smoothly to enable terminal equipment and send, before base station sends calibration pilot tone, base station can the positional information of notification terminal equipment Alignment pilot tone in the following manner:
Frequency domain information corresponding to described calibration pilot tone and/or sub-frame information are sent to described terminal equipment by mode one, described base station.
In the application scenarios of reality, for this kind of mode, the frequency domain information of calibration corresponding to pilot tone can be semi-static by high-level signaling by base station, or dynamically described terminal equipment is configured by physical layer control signal.
The sub-frame information calibrated corresponding to pilot tone can be then semi-static by high-level signaling by base station, or by physical layer control signal dynamically to described terminal equipment configuration, the content of the concrete sub-frame information configured can be corresponding cycle and sub-frame offset.
Mode two, described base station and described terminal equipment are made an appointment frequency domain information corresponding to described calibration pilot tone and/or sub-frame information.
In the application scenarios of reality, for this kind of mode, the frequency domain information of calibration corresponding to pilot tone can be the information of the fixing frequency domain at direct calibration pilot tone place of making an appointment in described base station and described terminal equipment.
The sub-frame information calibrated corresponding to pilot tone can be then realized by make an appointment in described base station and described terminal equipment cycle and sub-frame offset, the sub-frame information that base station and terminal equipment can be determined corresponding to described calibration pilot tone according to described cycle and sub-frame offset.
It is further noted that, no matter adopt which kind of above-mentioned mode, frequency domain information and sub-frame information are all concrete indicating modes of one of calibration pilot frequency locations information, both can be used alone, also can combinationally use, such as base station can send calibration pilot tone in the specific frequency domain of specific sub-frame, and terminal equipment then carries out the reception of calibrating pilot tone in corresponding scope.
In the application scenarios of reality; above-mentioned which kind of mode of concrete employing represents the positional information of calibration pilot tone; and especially by which kind of mode by the location information notification of concrete calibration pilot tone to terminal equipment; all can arrange according to actual needs, such change does not affect protection scope of the present invention.
In order to better make terminal equipment carry out corresponding channel measurement according to calibration pilot tone, before transmission corresponding calibration pilot tone, base station first can notify that described terminal equipment needs the antenna amount of calibration, and the pattern of calibration pilot tone.
In concrete enforcement scene, base station sends the transmission density of transmission density higher than CRS and CSI-RS of calibration pilot tone to terminal equipment.
When the corresponding multiple antenna of described calibration pilot tone, described multiple antenna, is specially multiple antennas of corresponding same transfer point (being specifically as follows base station), or multiple antennas of the corresponding multiple transfer point (being specifically as follows base station) of difference.
Step S302, described base station receive the calibration parameter that described terminal equipment returns, described calibration parameter for the down channel measurement result in described terminal equipment scope corresponding to described calibration pilot tone determined.
The uplink pilot signal determination calibration factor that step S303, described base station send according to described calibration parameter and described terminal equipment, and carry out antenna calibration according to described calibration factor.
Corresponding, in terminal equipment side, be then the calibration pilot tone receiving base station transmission, and the measurement of down channel is carried out according to corresponding calibration pilot tone, then, base station will be fed back to according to the determined calibration parameter of corresponding measurement result, and send uplink pilot signal according to the instruction of base station, base station is made to determine corresponding calibration factor accordingly, realize the calibration of antenna, the transmission means of concrete calibration pilot tone is see above-mentioned explanation, similar with it, at this, no longer repeat specification.
It is pointed out that the determined calibration parameter of terminal equipment can be the quantized value of channel coefficients, also can be by channel calculation other parameter out, such change do not affect protection scope of the present invention,
Compared with prior art, the technical scheme that the embodiment of the present invention proposes has the following advantages:
By applying the technical scheme of the embodiment of the present invention, calibration pilot tone is sent to terminal equipment by base station, channel measurement and the information feed back of antenna calibration is carried out according to this calibration pilot tone to make terminal equipment, by such process, make terminal equipment can according to the pilot signal meeting multiple antennas scene needs, base station is coordinated to carry out antenna calibration, even if when up-downgoing reciprocity is not strictly set up, also antenna calibration can be realized accurately.
Below, in conjunction with concrete application scenarios, the technical scheme that the embodiment of the present invention proposes is described.
The embodiment of the present invention proposes a kind of antenna calibration method, the calibration pilot tone of the UE-specific of terminal equipment is sent to according to base station, terminal equipment carries out corresponding channel measurement and information feed back, make base station can determine corresponding calibration factor accordingly, antenna is calibrated, achieve the antenna calibration under multiple antennas scene, when up-downgoing channel reciprocity is not strictly set up, the calibration of antenna can be realized.
With reference to aforesaid mode one and mode two, the embodiment of the present invention illustrates the antenna calibration handling process under the application scenarios adopting mode one and mode two respectively respectively by following embodiment.
As shown in Figure 4, the schematic flow sheet of the antenna calibration method under a kind of embody rule scene proposed for the embodiment of the present invention.
In the present embodiment, employing mode one, namely the notice of the positional information of calibrating pilot tone is carried out in base station to the mode that terminal equipment directly sends a notification message, for convenience of description, adopt frequency domain information as the positional information of calibration pilot tone in the present embodiment, concrete processing procedure is as follows:
Step S401, each UE report self ability information to base station.
Namely each UE needs to report the measurement needed for whether supporting to calibrate and feedback.
The UE participating in antenna calibration, according to the ability information of each UE received, is selected in step S402, base station, and notifies that this UE participates in antenna calibration.
In concrete enforcement scene, base station selected UE can be that channel quality is good and the terminal that translational speed is low.
In the present embodiment, select UE1 to participate in antenna calibration, the UE of following steps all refers to UE1, no longer repeat specification.
Step S403, base station notify that this UE measures down channel in certain frequency domain, there is the pilot tone being specifically designed to calibration measurement that base station sends in this frequency domain.
In concrete enforcement scene, base station is by this frequency domain of the semi-static configuration of high-level signaling, or dynamically indicate this frequency domain by physical layer control signal, or UE measures down channel in the fixing frequency domain of making an appointment, in this frequency domain, there is the pilot tone being specifically designed to calibration measurement that base station sends.
In the present embodiment, in the mode that base station sends frequency domain information directly to the UE participating in calibration in this step, illustrate accordingly.
The frequency domain information that base station sends can with notify that the message coalescing that this UE participates in calibrating is that a piece of news sends; also can before or after notifying that this UE participates in the message transmission of calibration; send to UE with the form of independent message, the change of concrete send mode does not affect protection scope of the present invention.
In this step, notify that the message that this UE participates in calibrating and frequency domain information send respectively by step S402 and step S403.
It is further noted that, in concrete enforcement scene, base station also needs the number of antennas notifying the calibration of UE needs, and the RE that the calibration pilot tone of every root antenna is shared in determined scope of resource in aforesaid step S403, namely the pattern of pilot tone is calibrated, so that UE can carry out corresponding channel measurement according to calibration pilot tone accurately.
Step S404, base station send calibration pilot tone to UE in corresponding frequency domain.
In concrete enforcement scene, calibration pilot tone can send by the density higher than CRS and CSI-RS etc., to ensure the quality of channel estimating.
Be illustrated in figure 5 the calibration pilot tone schematic diagram of four antennas in 1 PRB, the calibration pilot tone of every root antenna takies 4 RE, and the pilot tone of four antennas takies different RE.Every root antenna sends on the RE of calibration pilot tone at other antennas and does not send any signal.
Many antennas of calibration pilot tone can be the antennas of same transfer point (base station), also can be the antennas from different transfer point.Such as, the antenna of 4 shown in Fig. 5, can be 4 antennas of a base station, or be the antenna of two 2 antenna base stations respectively.Terminal can not distinguish every root antenna respectively from which transfer point when measuring.
Step S405, UE receive calibration pilot tone in corresponding frequency domain, and measure down channel.
Step S406, UE calculate calibration parameter according to the channel information measured and feed back to base station by up channel.
In actual applications, calibration parameter can be the quantized value of channel coefficients, or by channel calculation other parameters out.
The uplink pilot signal that step S407, base station send according to the calibration parameter of terminal feedback and UE calculates calibration factor, and calibrates.
As shown in Figure 6, the schematic flow sheet of the antenna calibration method under a kind of embody rule scene proposed for the embodiment of the present invention.
In the present embodiment, employing mode one, namely the notice of the positional information of calibrating pilot tone is carried out in base station to the mode that terminal equipment directly sends a notification message, for convenience of description, adopt sub-frame information as the positional information of calibration pilot tone in the present embodiment, concrete processing procedure is as follows:
Step S601, each UE report self ability information to base station.
Namely each UE needs to report the measurement needed for whether supporting to calibrate and feedback.
The UE participating in antenna calibration, according to the ability information of each UE received, is selected in step S602, base station, and notifies that this UE participates in antenna calibration.
In concrete enforcement scene, base station selected UE can be that channel quality is good and the terminal that translational speed is low.
In the present embodiment, select UE1 to participate in antenna calibration, the UE of following steps all refers to UE1, no longer repeat specification.
Step S603, base station notify that this UE measures down channel within the scope of certain subframe, there is the pilot tone being specifically designed to calibration measurement that base station sends within the scope of this subframe.
In concrete enforcement scene, base station is by this subframe scope of the semi-static configuration of high-level signaling, or dynamically indicate this subframe scope by physical layer control signal, or UE measures down channel within the scope of the fixing subframe of making an appointment, within the scope of this subframe, there is the pilot tone being specifically designed to calibration measurement that base station sends.
In the present embodiment, in the mode that base station sends sub-frame information directly to the UE participating in calibration in this step, illustrate accordingly.And the concrete form of sub-frame information can be base station send cycle and sub-frame offset to UE, UE can determine corresponding sub-frame information accordingly.
The sub-frame information that base station sends can with notify that the message coalescing that this UE participates in calibrating is that a piece of news sends; also can before or after notifying that this UE participates in the message transmission of calibration; send to UE with the form of independent message, the change of concrete send mode does not affect protection scope of the present invention.
In this step, notify that the message that this UE participates in calibrating and sub-frame information send respectively by step S602 and step S603.
It is further noted that, in concrete enforcement scene, base station also needs the number of antennas notifying the calibration of UE needs, and the RE that the calibration pilot tone of every root antenna is shared in determined scope of resource in aforesaid step S603, namely the pattern of pilot tone is calibrated, so that UE can carry out corresponding channel measurement according to calibration pilot tone accurately.
Step S604, base station send calibration pilot tone to UE in corresponding subframe.
In concrete enforcement scene, calibration pilot tone can send by the density higher than CRS and CSI-RS etc., to ensure the quality of channel estimating.
Concrete transmission example equally as shown in Figure 5, is not repeated.
Step S605, UE receive calibration pilot tone within the scope of corresponding subframe, and measure down channel.
Step S606, UE calculate calibration parameter according to the channel information measured and feed back to base station by up channel.
In actual applications, calibration parameter can be the quantized value of channel coefficients, or by channel calculation other parameters out.
The uplink pilot signal that step S607, base station send according to the calibration parameter of terminal feedback and UE calculates calibration factor, and calibrates.
As shown in Figure 7, the schematic flow sheet of the antenna calibration method under a kind of embody rule scene proposed for the embodiment of the present invention.
In the present embodiment, adopt mode two, namely base station and UE make an appointment and calibrate the positional information of pilot tone, and for convenience of description, adopt frequency domain information as the positional information of calibration pilot tone in the present embodiment, concrete processing procedure is as follows:
Step S701, base station and each UE make an appointment frequency domain information.
Step S702, each UE report self ability information to base station.
Namely each UE needs to report the measurement needed for whether supporting to calibrate and feedback.
The UE participating in antenna calibration, according to the ability information of each UE received, is selected in step S703, base station, and notifies that this UE participates in antenna calibration.
In concrete enforcement scene, base station selected UE can be that channel quality is good and the terminal that translational speed is low.
In the present embodiment, select UE1 to participate in antenna calibration, the UE of following steps all refers to UE1, no longer repeat specification.
Step S704, UE determine the positional information of calibration pilot tone according to presetting frequency domain information.
It is further noted that, in concrete enforcement scene, base station can notify that UE needs the number of antennas of calibration, and the RE that the calibration pilot tone of every root antenna is shared in the scope of resource corresponding to the frequency domain information preset, namely the pattern of pilot tone is calibrated, so that UE can carry out corresponding channel measurement according to calibration pilot tone accurately.
Step S705, base station send calibration pilot tone to UE in corresponding frequency domain.
In concrete enforcement scene, calibration pilot tone can send by the density higher than CRS and CSI-RS etc., to ensure the quality of channel estimating.Many antennas of calibration pilot tone can be the antennas of same transfer point (base station), also can be the antennas from different transfer point.
Concrete transmission example equally as shown in Figure 5, is not repeated.
Step S706, terminal equipment receive calibration pilot tone on corresponding frequency domain, and measure down channel.
Step S707, terminal equipment calculate calibration parameter according to the channel information measured and feed back to base station by up channel.
In actual applications, calibration parameter can be the quantized value of channel coefficients, or by channel calculation other parameters out.
The uplink pilot signal that step S708, base station send according to the calibration parameter of terminal feedback and terminal equipment calculates calibration factor, and calibrates.
As shown in Figure 8, the schematic flow sheet of the antenna calibration method under a kind of embody rule scene proposed for the embodiment of the present invention.
In the present embodiment, adopt mode two, namely base station and UE make an appointment and calibrate the positional information of pilot tone, and for convenience of description, adopt sub-frame information as the positional information of calibration pilot tone in the present embodiment, concrete processing procedure is as follows:
Step S801, base station and each UE make an appointment and calibrate the positional information of pilot tone.
Step S802, each UE report self ability information to base station.
Namely each UE needs to report the measurement needed for whether supporting to calibrate and feedback.
The UE participating in antenna calibration, according to the ability information of each UE received, is selected in step S803, base station, and notifies that this UE participates in antenna calibration.
In concrete enforcement scene, base station selected UE can be that channel quality is good and the terminal that translational speed is low.
In the present embodiment, select UE1 to participate in antenna calibration, the UE of following steps all refers to UE1, no longer repeat specification.
In the present embodiment, positional information due to calibration pilot tone is actual is sub-frame information, sub-frame information can with cycle+mode of sub-frame offset determines, in the application scenarios of reality, the positional information of calibration pilot tone can be made an appointment and be adopted sub-frame information to determine, but concrete cycle and sub-frame offset can be configured to terminal equipment by base station.
The such as cycle is T
period, sub-frame offset is S
offset, then the condition that there is calibration pilot tone in subframe S is (S-S
offset) modT
period=0.
Certainly, sub-frame information also dynamically can be indicated by physical layer signaling, specifically with reference to the mode in aforesaid step S403, illustrates no longer separately in the present embodiment.
And on the other hand, aforesaid frequency domain information also can adopt the similar method of this step to make an appointment in base station and UE in advance, and the scheme that such change can be applied in the present embodiment equally processes, and belongs to protection scope of the present invention equally.
Step S804, UE determine the positional information of calibrating pilot tone according to presupposed information.
It is further noted that, in concrete enforcement scene, base station can notify that UE needs the number of antennas of calibration, and the RE that the calibration pilot tone of every root antenna is shared in the scope of resource corresponding to the sub-frame information preset, namely the pattern of pilot tone is calibrated, so that UE can carry out corresponding channel measurement according to calibration pilot tone accurately.
Step S805, base station send calibration pilot tone to UE in corresponding subframe.
In concrete enforcement scene, calibration pilot tone can send by the density higher than CRS and CSI-RS etc., to ensure the quality of channel estimating.Many antennas of calibration pilot tone can be the antennas of same transfer point (base station), also can be the antennas from different transfer point.
Concrete transmission example equally as shown in Figure 5, is not repeated.
Step S806, terminal equipment receive calibration pilot tone in corresponding subframe, and measure down channel.
Step S807, terminal equipment calculate calibration parameter according to the channel information measured and feed back to base station by up channel.
In actual applications, calibration parameter can be the quantized value of channel coefficients, or by channel calculation other parameters out.
The uplink pilot signal that step S808, base station send according to the calibration parameter of terminal feedback and terminal equipment calculates calibration factor, and calibrates.
It is further noted that, above-mentioned frequency domain information and sub-frame information also can combine the positional information as calibration pilot tone, namely in the specific frequency domain of specific sub-frame, there is calibration pilot tone, and the send mode of concrete frequency domain information and sub-frame information can be the same or different, such as:
1, base station high-level signaling configuration frequency domain information and sub-frame information.
2, base station high-level signaling configuration frequency domain information, and adopt physical layer control signal dynamically to indicate sub-frame information.
3, physical layer signaling dynamically indicates frequency domain information and sub-frame information.
Concrete send mode also has other compound mode, and above three kinds of compound modes are the preferred exemplary that the embodiment of the present invention provides, and the change of concrete compound mode can't affect protection scope of the present invention.
As shown in Figure 9, the schematic flow sheet of the antenna calibration method under a kind of embody rule scene proposed for the embodiment of the present invention.
In the present embodiment, employing mode one, namely the notice of positional information of calibrating pilot tone is carried out to the mode that terminal equipment directly sends a notification message in base station, and in the present embodiment, base station sends frequency domain information and the sub-frame information positional information as calibration pilot tone to terminal, and concrete processing procedure is as follows:
Step S901, each UE report self ability information to base station.
Namely each UE needs to report the measurement needed for whether supporting to calibrate and feedback.
The UE participating in antenna calibration, according to the ability information of each UE received, is selected in step S902, base station, and notifies that this UE participates in antenna calibration.
In concrete enforcement scene, base station selected UE can be that channel quality is good and the terminal that translational speed is low.
In the present embodiment, select UE1 to participate in antenna calibration, the UE of following steps all refers to UE1, no longer repeat specification.
Step S903, base station notify that this UE (in the certain frequency domain within the scope of certain subframe) within the scope of certain time-frequency measures down channel, the pilot tone being specifically designed to calibration measurement that there is base station transmission within the scope of this time-frequency.
In concrete enforcement scene, base station is by high-level signaling configuration frequency domain information and sub-frame information, or base station configures frequency domain information by high-level signaling, and adopt physical layer control signal dynamically to indicate sub-frame information, or base station dynamically indicate frequency domain information and sub-frame information by physical layer signaling.
The concrete form of sub-frame information can be that base station sends cycle and sub-frame offset to UE, and UE can determine corresponding sub-frame information accordingly.Can being calculated by the subframe at physical layer control signal place of sub-frame information, as physical layer control signal sends in the n-th subframe, then corresponding sub-frame information can be defined as the n-th+k subframe, and wherein k is the parameter of making an appointment, or base station informs the parameter of terminal.
Sub-frame information can send with frequency domain information in a piece of news, also can be placed in independent message and send separately.
The sub-frame information that base station sends and frequency domain information can with notify that the message coalescing that this UE participates in calibrating is that a piece of news sends; also can before or after notifying that this UE participates in the message transmission of calibration; send to UE with the form of independent message, the change of concrete send mode does not affect protection scope of the present invention.
It is further noted that, in concrete enforcement scene, base station also needs the number of antennas notifying the calibration of UE needs, and the RE that the calibration pilot tone of every root antenna is shared in determined scope of resource in aforesaid step 903, namely the pattern of pilot tone is calibrated, so that UE can carry out corresponding channel measurement according to calibration pilot tone accurately.
Calibration pilot tone is sent to UE in the corresponding frequency domain within the scope of corresponding subframe of step S904, base station.
In concrete enforcement scene, calibration pilot tone can send by the density higher than CRS and CSI-RS etc., to ensure the quality of channel estimating.
Concrete transmission example equally as shown in Figure 5, is not repeated.
Receive calibration pilot tone in step S905, the UE corresponding frequency domain within the scope of corresponding subframe, and down channel is measured.
Step S906, UE calculate calibration parameter according to the channel information measured and feed back to base station by up channel.
In actual applications, calibration parameter can be the quantized value of channel coefficients, or by channel calculation other parameters out.
The uplink pilot signal that step S907, base station send according to the calibration parameter of terminal feedback and UE calculates calibration factor, and calibrates.
No matter adopt which kind of above-mentioned mode; UE is after the positional information receiving corresponding calibration pilot tone; down channel is estimated in corresponding scope; concrete implementation can with reference to the explanation of previous embodiment; at this no longer repeated description, the change of such positional information particular type can't affect protection scope of the present invention.
Compared with prior art, the technical scheme that the embodiment of the present invention proposes has the following advantages:
By applying the technical scheme of the embodiment of the present invention, calibration pilot tone is sent to terminal equipment by base station, channel measurement and the information feed back of antenna calibration is carried out according to this calibration pilot tone to make terminal equipment, by such process, make terminal equipment can according to the pilot signal meeting multiple antennas scene needs, base station is coordinated to carry out antenna calibration, even if when up-downgoing reciprocity is not strictly set up, also antenna calibration can be realized accurately.
In order to realize the technical scheme of the embodiment of the present invention, the embodiment of the present invention additionally provides a kind of base station, and its structural representation as shown in Figure 10, at least comprises:
Sending module 101, for sending calibration pilot tone to terminal equipment;
Receiver module 102, for receiving the calibration parameter that described terminal equipment returns, the down channel measurement result in scope corresponding to the calibration pilot tone that described calibration parameter sends according to described sending module 101 for described terminal equipment is determined;
Determination module 103, for the uplink pilot signal determination calibration factor that the calibration parameter received by described receiver module 102 and described terminal equipment send, and carries out antenna calibration according to described calibration factor.
Concrete,
Described receiver module 102, also for described sending module 101 to terminal equipment send calibration pilot tone before, receive the ability information of self that described terminal equipment reports;
Described sending module 101, also for the ability information of each terminal equipment received by described receiver module 102, determines that described terminal equipment participates in calibration, and sends corresponding notification message to described terminal equipment.
Wherein, described sending module 101, also for giving described terminal equipment by the location information notification of described calibration pilot tone in the following manner:
Frequency domain information corresponding to described calibration pilot tone and/or sub-frame information are sent to described terminal equipment; Or,
Described base station and described terminal equipment are made an appointment frequency domain information corresponding to described calibration pilot tone and/or sub-frame information, and when determining that described terminal equipment participates in calibration, notify that described terminal equipment receives described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment and/or sub-frame information.
Further, described sending module 101, specifically for:
Semi-static by high-level signaling, or by physical layer control signal dynamically to the frequency domain information calibrated described in described terminal equipment configuration corresponding to pilot tone; And/or,
By physical layer control signal dynamically to the sub-frame information calibrated described in described terminal equipment configuration corresponding to pilot tone.
In the application scenarios of reality, described sending module 101, specifically for:
When the information of fixing frequency domain at described calibration pilot tone place of making an appointment in described base station and described terminal equipment, if determine that described terminal equipment participates in calibration, then notify that described terminal equipment receives described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment; And/or,
Make an appointment in described base station and described terminal equipment cycle and sub-frame offset, if determine that described terminal equipment participates in calibration, then notify that described terminal equipment determines the sub-frame information corresponding to described calibration pilot tone according to described cycle and sub-frame offset, and in the scope corresponding to described sub-frame information, receive described calibration pilot tone.
Further, described sending module 101, also for before sending calibration pilot tone to terminal equipment, notifies that described terminal equipment needs the antenna amount of calibration, and the pattern of calibration pilot tone.
Further, the embodiment of the present invention also proposed a kind of terminal equipment, and its structural representation as shown in figure 11, at least comprises:
Receiver module 111, for receiving the calibration pilot tone that base station sends;
Determination module 112, measures down channel for the calibration pilot tone received by described receiver module 111, and according to corresponding measurement result determination calibration parameter;
Sending module 113, for sending described calibration parameter and uplink pilot signal to described base station, to make described base station determine corresponding calibration factor, and carries out antenna calibration according to calibration factor.
Wherein, described sending module 113, also for receive at described receiver module 111 base station send calibration pilot tone before, the ability information of the described terminal equipment reported to described base station;
Described receiver module 111, the described terminal equipment of confirmation also sent for receiving described base station participates in the notification message of calibration.
On the other hand, described receiver module 111, specifically for determining the positional information of the calibration pilot tone that described base station sends in the following manner:
Receive the frequency domain information corresponding to described calibration pilot tone and/or the sub-frame information of the transmission of described base station; Or,
Described base station and described terminal equipment are made an appointment frequency domain information corresponding to described calibration pilot tone and/or sub-frame information, and when determining that in described base station described terminal equipment participates in calibration, receive the notification message receiving described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment and/or sub-frame information that described base station sends.
Concrete, described receiver module 111, specifically for:
Receive described base station semi-static by high-level signaling, or pass through the frequency domain information corresponding to described calibration pilot tone of physical layer control signal dynamic-configuration; And/or,
Receive the sub-frame information corresponding to described calibration pilot tone of described base station physical layer control signal dynamic-configuration.
On the other hand, described receiver module 111, specifically for:
When the information of fixing frequency domain at described calibration pilot tone place of making an appointment in described base station and described terminal equipment, receive the notification message receiving described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment that described base station sends; And/or,
Make an appointment in described base station and described terminal equipment cycle and sub-frame offset, what receive that described base station sends determines corresponding to described calibration pilot tone sub-frame information according to described cycle and sub-frame offset, and in the scope corresponding to described sub-frame information, receive the notification message of described calibration pilot tone.
In the application scenarios of reality,
Described receiver module 111, also for before the calibration pilot tone receiving the transmission of described base station, according to the message that received described base station sends, determines the antenna amount needing calibration, and the pattern of calibration pilot tone.
It is further noted that described determination module 112, specifically for:
The quantized value of the channel coefficients corresponding to described measurement result, determines described calibration parameter; Or,
By other parameters obtained according to described measurement result, determine described calibration parameter.
Compared with prior art, the technical scheme that the embodiment of the present invention proposes has the following advantages:
By applying the technical scheme of the embodiment of the present invention, calibration pilot tone is sent to terminal equipment by base station, channel measurement and the information feed back of antenna calibration is carried out according to this calibration pilot tone to make terminal equipment, by such process, make terminal equipment can according to the pilot signal meeting multiple antennas scene needs, base station is coordinated to carry out antenna calibration, even if when up-downgoing reciprocity is not strictly set up, also antenna calibration can be realized accurately.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform each method implementing described in scene of the embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram preferably implementing scene, the module in accompanying drawing or flow process might not be that the enforcement embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device implemented in scene can carry out being distributed in the device of enforcement scene according to implementing scene description, also can carry out respective change and being arranged in the one or more devices being different from this enforcement scene.The module of above-mentioned enforcement scene can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality implementing scene.
Be only the several concrete enforcement scene of the embodiment of the present invention above, but the embodiment of the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into the business limited field of the embodiment of the present invention.
Claims (24)
1. an antenna calibration method, is characterized in that, at least comprises the following steps:
Base station sends calibration pilot tone to terminal equipment;
Described base station receives the calibration parameter that described terminal equipment returns, described calibration parameter for the down channel measurement result in described terminal equipment scope corresponding to described calibration pilot tone determined;
The uplink pilot signal determination calibration factor that described base station sends according to described calibration parameter and described terminal equipment, and carry out antenna calibration according to described calibration factor;
The positional information of described calibration pilot tone notifies described terminal equipment especially by with under type:
Frequency domain information corresponding to described calibration pilot tone and/or sub-frame information are sent to described terminal equipment by described base station; Or,
Described base station and described terminal equipment are made an appointment frequency domain information corresponding to described calibration pilot tone and/or sub-frame information, and when determining that in described base station described terminal equipment participates in calibration, notify that described terminal equipment receives described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment and/or sub-frame information;
When the corresponding multiple antenna of described calibration pilot tone, described multiple antenna, is specially:
Multiple antennas of corresponding same base station; Or,
Multiple antennas of corresponding multiple base station respectively.
2. the method for claim 1, is characterized in that, described base station also comprises before sending calibration pilot tone to terminal equipment:
Described base station receives the ability information of self that described terminal equipment reports;
Described base station, according to the ability information of each terminal equipment received, determines that described terminal equipment participates in calibration, and sends the notification message confirming described terminal equipment participation calibration to described terminal equipment.
3. the method for claim 1, is characterized in that, the frequency domain information corresponding to described calibration pilot tone and/or sub-frame information are sent to described terminal equipment by described base station, specifically comprise:
Described base station is semi-static by high-level signaling, or by physical layer control signal dynamically to the frequency domain information calibrated described in described terminal equipment configuration corresponding to pilot tone; And/or,
Described base station by physical layer control signal dynamically to the sub-frame information calibrated described in described terminal equipment configuration corresponding to pilot tone.
4. method as claimed in claim 3, it is characterized in that, described base station, is specially dynamically to the sub-frame information calibrated described in described terminal equipment configuration corresponding to pilot tone by physical layer control signal:
Described base station sends cycle and sub-frame offset to described terminal equipment, determines the sub-frame information corresponding to described calibration pilot tone to make described terminal equipment according to described cycle and sub-frame offset.
5. the method for claim 1, is characterized in that, described base station and described terminal equipment are made an appointment frequency domain information corresponding to described calibration pilot tone and/or sub-frame information, specifically comprise:
To make an appointment in described base station and described terminal equipment the information of fixing frequency domain at described calibration pilot tone place; And/or,
To make an appointment in described base station and described terminal equipment cycle and sub-frame offset, after described base station determines that described terminal equipment participates in calibration, described base station notifies that described terminal equipment determines the sub-frame information corresponding to described calibration pilot tone according to described cycle and sub-frame offset.
6. the method for claim 1, is characterized in that, described base station also comprises before sending calibration pilot tone to terminal equipment:
Described base station notifies that described terminal equipment needs the antenna amount of calibration, and the pattern of calibration pilot tone.
7. a base station, is characterized in that, at least comprises:
Sending module, for sending calibration pilot tone to terminal equipment; Also for giving described terminal equipment by the location information notification of described calibration pilot tone in the following manner: the frequency domain information corresponding to described calibration pilot tone and/or sub-frame information are sent to described terminal equipment; Or, described base station and described terminal equipment are made an appointment frequency domain information corresponding to described calibration pilot tone and/or sub-frame information, and when determining that described terminal equipment participates in calibration, notify that described terminal equipment receives described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment and/or sub-frame information;
Receiver module, for receiving the calibration parameter that described terminal equipment returns, the down channel measurement result in scope corresponding to the calibration pilot tone that described calibration parameter sends according to described sending module for described terminal equipment is determined;
Determination module, for the uplink pilot signal determination calibration factor that the calibration parameter received by described receiver module and described terminal equipment send, and carries out antenna calibration according to described calibration factor;
When the corresponding multiple antenna of described calibration pilot tone, described multiple antenna, is specially:
Multiple antennas of corresponding same base station; Or,
Multiple antennas of corresponding multiple base station respectively.
8. base station as claimed in claim 7, is characterized in that,
Described receiver module, also for described sending module to terminal equipment send calibration pilot tone before, receive the ability information of self that described terminal equipment reports;
Described sending module, also for the ability information of each terminal equipment received by described receiver module, determines that described terminal equipment participates in calibration, and sends corresponding notification message to described terminal equipment.
9. base station as claimed in claim 7, is characterized in that, described sending module, specifically for:
Semi-static by high-level signaling, or by physical layer control signal dynamically to the frequency domain information calibrated described in described terminal equipment configuration corresponding to pilot tone; And/or,
By physical layer control signal dynamically to the sub-frame information calibrated described in described terminal equipment configuration corresponding to pilot tone.
10. base station as claimed in claim 7, is characterized in that, described sending module, specifically for:
When the information of fixing frequency domain at described calibration pilot tone place of making an appointment in described base station and described terminal equipment, if determine that described terminal equipment participates in calibration, then notify that described terminal equipment receives described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment; And/or,
Make an appointment in described base station and described terminal equipment cycle and sub-frame offset, if determine that described terminal equipment participates in calibration, then notify that described terminal equipment determines the sub-frame information corresponding to described calibration pilot tone according to described cycle and sub-frame offset, and in the scope corresponding to described sub-frame information, receive described calibration pilot tone.
11. base stations as claimed in claim 7, is characterized in that, described sending module, also for:
Before sending calibration pilot tone to terminal equipment, notify that described terminal equipment needs the antenna amount of calibration, and the pattern of calibration pilot tone.
12. 1 kinds of antenna calibration methods, is characterized in that, at least comprise the following steps:
Terminal equipment receives the calibration pilot tone that base station sends;
Described terminal equipment is measured down channel according to described calibration pilot tone, and according to corresponding measurement result determination calibration parameter;
Described terminal equipment sends described calibration parameter and uplink pilot signal to described base station, to make described base station determine corresponding calibration factor, and carries out antenna calibration according to calibration factor;
Wherein, the positional information of the calibration pilot tone that described base station sends determined in the following manner by described terminal equipment: described terminal equipment receives the frequency domain information corresponding to described calibration pilot tone and/or the sub-frame information of the transmission of described base station; Or, described base station and described terminal equipment are made an appointment frequency domain information corresponding to described calibration pilot tone and/or sub-frame information, and when determining that in described base station described terminal equipment participates in calibration, described terminal equipment receives the notification message receiving described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment and/or sub-frame information that described base station sends;
When the corresponding multiple antenna of described calibration pilot tone, described multiple antenna, is specially:
Multiple antennas of corresponding same base station; Or,
Multiple antennas of corresponding multiple base station respectively.
13. methods as claimed in claim 12, is characterized in that, described terminal equipment also comprises before receiving the calibration pilot tone of base station transmission:
The ability information of self that described terminal equipment reports to described base station;
Described terminal equipment receives the notification message of confirmation self the participation calibration that described base station sends.
14. methods as claimed in claim 12, is characterized in that, described terminal equipment receives the frequency domain information corresponding to described calibration pilot tone and/or the sub-frame information of the transmission of described base station, specifically comprises:
It is semi-static by high-level signaling that described terminal equipment receives described base station, or pass through the frequency domain information corresponding to described calibration pilot tone of physical layer control signal dynamic-configuration; And/or,
Described terminal equipment receives the sub-frame information corresponding to described calibration pilot tone of described base station physical layer control signal dynamic-configuration.
15. methods as claimed in claim 12, is characterized in that, described terminal equipment receives the sub-frame information corresponding to described calibration pilot tone of described base station physical layer control signal dynamic-configuration, is specially:
Described terminal equipment receives cycle and the sub-frame offset of the transmission of described base station, and determines the sub-frame information corresponding to described calibration pilot tone according to described cycle and sub-frame offset.
16. methods as claimed in claim 12, is characterized in that, described base station and described terminal equipment are made an appointment frequency domain information corresponding to described calibration pilot tone and/or sub-frame information, specifically comprise:
To make an appointment in described base station and described terminal equipment the information of fixing frequency domain at described calibration pilot tone place; And/or,
To make an appointment in described base station and described terminal equipment cycle and sub-frame offset, after described base station determines that described terminal equipment participates in calibration, what described terminal equipment received that described base station sends determines the notification message of the sub-frame information corresponding to described calibration pilot tone according to described cycle and sub-frame offset.
17. methods as claimed in claim 12, is characterized in that, described terminal equipment also comprises before receiving the calibration pilot tone of base station transmission:
The message that described terminal equipment sends according to described base station, determines the antenna amount needing calibration, and the pattern of calibration pilot tone.
18. methods as claimed in claim 12, is characterized in that, described basis corresponding measurement result determination calibration parameter, is specially:
The quantized value of the channel coefficients of described terminal equipment corresponding to described measurement result, determines described calibration parameter; Or,
Other parameters that described terminal equipment will obtain according to described measurement result, determine described calibration parameter.
19. 1 kinds of terminal equipments, is characterized in that, at least comprise:
Receiver module, for receiving the calibration pilot tone that base station sends; Specifically for determining the positional information of the calibration pilot tone that described base station sends in the following manner: the frequency domain information corresponding to described calibration pilot tone and/or the sub-frame information that receive the transmission of described base station; Or, described base station and described terminal equipment are made an appointment frequency domain information corresponding to described calibration pilot tone and/or sub-frame information, and when determining that in described base station described terminal equipment participates in calibration, receive the notification message receiving described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment and/or sub-frame information that described base station sends;
Determination module, measures down channel for the calibration pilot tone received by described receiver module, and according to corresponding measurement result determination calibration parameter;
Sending module, for sending described calibration parameter and uplink pilot signal to described base station, to make described base station determine corresponding calibration factor, and carries out antenna calibration according to calibration factor;
When the corresponding multiple antenna of described calibration pilot tone, described multiple antenna, is specially:
Multiple antennas of corresponding same base station; Or,
Multiple antennas of corresponding multiple base station respectively.
20. terminal equipments as claimed in claim 19, is characterized in that,
Described sending module, also for before the calibration pilot tone of described receiver module reception base station transmission, the ability information of the described terminal equipment reported to described base station;
Described receiver module, the described terminal equipment of confirmation also sent for receiving described base station participates in the notification message of calibration.
21. terminal equipments as claimed in claim 19, is characterized in that, described receiver module, specifically for:
Receive described base station semi-static by high-level signaling, or pass through the frequency domain information corresponding to described calibration pilot tone of physical layer control signal dynamic-configuration; And/or,
Receive the sub-frame information corresponding to described calibration pilot tone of described base station physical layer control signal dynamic-configuration.
22. terminal equipments as claimed in claim 19, is characterized in that, described receiver module, specifically for:
When the information of fixing frequency domain at described calibration pilot tone place of making an appointment in described base station and described terminal equipment, receive the notification message receiving described calibration pilot tone in the scope corresponding to the described frequency domain information of making an appointment that described base station sends; And/or,
Make an appointment in described base station and described terminal equipment cycle and sub-frame offset, what receive that described base station sends determines corresponding to described calibration pilot tone sub-frame information according to described cycle and sub-frame offset, and in the scope corresponding to described sub-frame information, receive the notification message of described calibration pilot tone.
23. terminal equipments as claimed in claim 19, is characterized in that,
Described receiver module, also for before the calibration pilot tone receiving the transmission of described base station, according to the message that received described base station sends, determines the antenna amount needing calibration, and the pattern of calibration pilot tone.
24. terminal equipments as claimed in claim 19, is characterized in that, described determination module, specifically for:
The quantized value of the channel coefficients corresponding to described measurement result, determines described calibration parameter; Or,
By other parameters obtained according to described measurement result, determine described calibration parameter.
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| CN201110231311.5A CN102291189B (en) | 2011-08-12 | 2011-08-12 | Antenna calibration method and equipment |
| PCT/CN2012/079663 WO2013023535A1 (en) | 2011-08-12 | 2012-08-03 | Method and device for calibrating antenna |
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| CN102291189B (en) * | 2011-08-12 | 2016-03-23 | 电信科学技术研究院 | Antenna calibration method and equipment |
| CN103259581B (en) * | 2012-02-16 | 2016-08-03 | 电信科学技术研究院 | A kind of carry out the method for antenna calibration, system and equipment |
| CN102684800B (en) * | 2012-03-16 | 2016-12-14 | 南京中兴软件有限责任公司 | Active antenna system is descending, the method for testing of up-link wireless index and device |
| CN103595514B (en) | 2012-08-13 | 2018-02-16 | 中兴通讯股份有限公司 | The method and base station that a kind of data sent to cooperation AP points are calibrated |
| CN103873122B (en) * | 2012-12-11 | 2019-02-19 | 中兴通讯股份有限公司 | Sending method, device and the equipment of aerial signal |
| EP2784952B1 (en) | 2013-03-26 | 2016-03-23 | Krea Icerik Hizmetleri Ve Produksiyon Anonim Sirketi | A method and system for signal measurement and approval over controlled environment |
| CN105093147B (en) * | 2014-05-20 | 2018-11-23 | 中国人民解放军63973部队 | A kind of electromagnetic pulse electric field probe Time Domain Calibration method |
| CN104467933B (en) * | 2014-10-29 | 2017-11-28 | 清华大学 | Trunk channel calibration method based on superposition forwarding in time-division duplex multi-antenna system |
| CN105634658A (en) * | 2014-10-31 | 2016-06-01 | 中国移动通信集团公司 | Transmission processing method, equipment and system |
| EP3282595A4 (en) | 2015-04-10 | 2018-12-05 | Mitsubishi Electric Corporation | Communication system |
| CN108023631B (en) | 2016-11-04 | 2023-08-22 | 华为技术有限公司 | Method and device for transmitting information |
| CN108282211B (en) * | 2017-01-06 | 2023-11-03 | 华为技术有限公司 | Signal transmission method, network equipment and terminal equipment |
| CN109150323B (en) * | 2017-06-15 | 2021-05-25 | 中兴通讯股份有限公司 | Antenna calibration method, wireless remote unit to be calibrated and base station |
| CN115173967A (en) * | 2021-04-02 | 2022-10-11 | 华为技术有限公司 | Communication method and device |
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