CN104618930B - A kind of multiple antennas test system calibration method and equipment - Google Patents
A kind of multiple antennas test system calibration method and equipment Download PDFInfo
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- CN104618930B CN104618930B CN201410838438.7A CN201410838438A CN104618930B CN 104618930 B CN104618930 B CN 104618930B CN 201410838438 A CN201410838438 A CN 201410838438A CN 104618930 B CN104618930 B CN 104618930B
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Abstract
This application discloses a kind of multiple antennas test system calibration method and equipment, the RRU of the base station in multiple antennas test system calibration mouth is connected with being used to connect the radio frequency line of terminal UE to be calibrated in multiple antennas test system, including：Obtain from each downlink radio frequency passage be delivered to calibration mouth after calibrating sequence signal down channel parameters change information, obtain the up channel parameter change information that calibrating sequence signal after each upstream radio-frequency passage is delivered to from calibration oral instructions, down channel parameters, which change information and up channel parameter change information, includes phase and time delay, and calibrating sequence signal is ZC sequences；Change information based on down channel parameters to calibrate each downlink radio frequency passage；Each upstream radio-frequency passage is calibrated based on up channel parameter change information；Calibration steps is simplified, without changing line, all passage calibrations can be just completed, improve the precision of calibration.
Description
Technical field
The invention relates to communication technical field, more particularly to a kind of multiple antennas test system calibration method.This Shen
Please embodiment also relate to a kind of calibrator (-ter) unit.
Background technology
In experiments on mobile communication room multiple antennas test system configurations by base station and core net, wireless channel simulation instrument (such as
Shown in Fig. 1, by taking C8 as an example, C8 is 8 inputs 8 output channel simulator), terminal and RF cable, attenuator and circulator etc.
Interface unit forms.
The instrument used in the prior art is vector network analyzer, and its function is to measure each seed ginseng of two-port network
Number amplitude and phase, belong to the general purpose instrument of RF application, there is two interfaces Port1 and Port2.
It is as follows using vector network analyzer calibration method at present：
By taking UE1 calibration as an example, the up phase alignments of C8 are carried out first, UE Ant are connect into Port1 mouths, signal RF connects
Port2 mouths, wherein comprising the following steps that：
(1) UE1 upward signals line UE1Ant1 is connected to the port1 of arrow net instrument；
(2) the signal wire RF1 for going upward to coupler is connected to the port2 of arrow net instrument；
(3) the center frequency point of arrow net instrument is set, Measurement bandwidth, launches S21 signals, carries out phase measurement；
(4) arrow net instrument port1 transmission power is set, and (this power is entered according to each producer using different upstream attenuation devices
Row regulation so that up C8 actually enters power and is less than -10dbm)；
(5) Time Delay of Systems compensation (ElectricalDelay) operation is carried out, preserves the phase value of current pass, selection
" Data＆Mem " makes Data and Mem while shown；
(6) the radio frequency of arrow net instrument is closed, and connects the second road upward signal line RF2 to the port2 for swearing net instrument；
(7) the phase compensation of up C8 output ports adjusted, and the change of net phase is lost in observation, makes the second tunnel and the first via
Phase difference is becoming tight in 0；
(8) the second road and the first via are made after being adjusted close to consistent, it is to other signal cable repeat step 6-7 until upper
Row RF8 calibrations are completed；
(9), if up having Ant2 to UE1 or have UE2, arrow net instrument radio frequency closed, then by first via upward signal line Ant1
The port2 of arrow net instrument is connected to, and connects UE1 second road signal line Ant2 or UE2 Ant to the port1 for swearing net instrument；；
(10) the output port for adjusting UE1Ant2 corresponding to up C8 carries out phase compensation adjustment, is allowed to align with the first via；
(11) repeat step 9-10, until all UE Ant calibrations are completed, arrow net instrument radio frequency, uplink phase alignment are closed
Complete.
The progress descending phase alignments of C8 after the up phase alignments of C8 are completed, and the descending phase alignments of C8 and up calibration
It is similar, signal Ant is simply connect into Port1 mouths, UE Ant connect Port2 mouths, and calibration steps is the same as up calibration.
UE1 calibration is completed above；UE2 calibration is similar with UE1 calibration, repeats no more.
But when being calibrated in the prior art, face problems with：Due to changing the connection of RF cable repeatedly, make
Into the defects of more calibration efficiencies are low is operated, very important person is calibrated in addition and is manually adjusted, is observed in adjustment；And artificial judged result precision
It is low；Calibration process cable is disconnected, and system is reconnected back after calibration, and this process can cause to connect tightness change,
Systematic error can be caused to increase.
The content of the invention
It is an object of the invention to provide a kind of multiple antennas test system calibration method and equipment, to improve the essence of calibration
Degree.
Therefore, the invention provides a kind of multiple antennas test system calibration method, the base in the multiple antennas test system
The RRU to stand calibration mouth is connected with being used to connect the radio frequency line of terminal UE to be calibrated in the multiple antennas test system, described
Method includes：
Obtain the down channel parameters change that calibrating sequence signal after the calibration mouth is delivered to from each downlink radio frequency passage
Information, and obtain the up channel parameter change that calibrating sequence signal after each upstream radio-frequency passage is delivered to from the calibration oral instructions
Information, the down channel parameters change information and are delivered to the school from each downlink radio frequency passage including the calibrating sequence signal
Phase and time delay caused by quasi- mouth, the up channel parameter change information include the calibrating sequence signal from the calibration
Oral instructions are delivered to phase and time delay caused by each upstream radio-frequency passage, and the calibrating sequence signal is ZC sequences；
Change information based on the down channel parameters to calibrate each downlink radio frequency passage；And based on described
Up channel parameter change information is calibrated to each upstream radio-frequency passage.
Preferably, it is described obtain from each downlink radio frequency passage be delivered to it is described calibration mouth after calibrating sequence signal it is descending
Channel parameter changes information, is specially：
The state of each downlink radio frequency passage is arranged to transmission state, and the state of the calibration mouth is arranged to
Reception state；
The calibrating sequence signal is sent by each downlink radio frequency passage, and it is described each by the calibration mouth reception
The calibrating sequence signal that downlink radio frequency passage is sent；
Each calibrating sequence signal and the calibrating sequence signal received based on the calibration mouth calculate resulting
Phase and time delay change information as the down channel parameters.
Preferably, described obtain from the calibration oral instructions is delivered to the upper of calibrating sequence signal after each upstream radio-frequency passage
Row channel parameter changes information, is specially：
The state of each upstream radio-frequency passage is arranged to reception state, and the state of the calibration mouth is arranged to
Transmission state；
The calibrating sequence signal is sent by the calibration mouth；And pass through school described in each upstream radio-frequency channel reception
The calibrating sequence signal that quasi- mouth is sent；
Calibrating sequence signal based on each upstream radio-frequency channel reception carries out calculating institute with the calibrating sequence signal
Obtained phase and time delay is as the up channel parameter change information.
Preferably, the down channel parameters change the channel estimation that information is each downlink radio frequency passage；The up letter
Road parameter change information is the channel estimation of each upstream radio-frequency passage；
Wherein, change information based on the down channel parameters to calibrate each downlink radio frequency passage, Yi Jiji
Each upstream radio-frequency passage is calibrated in the up channel parameter change information, is specially：
Based on formulaAnd formulaIt is it is determined that corresponding
Radio-frequency channel calibration factorWherein, ka=1 ..., Ka, n=1 ..., Msc, n=1 ..., Msc；
WhenFor each downlink radio frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor under each
Row radio-frequency channel calibration factor, school is carried out to each downlink radio frequency passage by each downlink radio frequency passage calibration factor
It is accurate；
WhenFor each upstream radio-frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor on each
Row radio-frequency channel calibration factor, school is carried out to each upstream radio-frequency passage by each upstream radio-frequency passage calibration factor
It is accurate.
Present invention also offers a kind of calibrator (-ter) unit, including：
First acquisition module, for obtain from each downlink radio frequency passage be delivered to the calibration mouth after calibrating sequence signal
Down channel parameters change information；The down channel parameters, which change information, includes the calibrating sequence signal from each downlink radio frequency
Passage is delivered to phase and time delay caused by the calibration mouth,
Second acquisition module, calibrating sequence signal after each upstream radio-frequency passage is delivered to for obtaining from the calibration oral instructions
Up channel parameter change information, the up channel parameter change information include the calibrating sequence signal from the calibration mouth
Phase and time delay caused by each upstream radio-frequency passage are delivered to, the calibrating sequence signal is ZC sequences；
Calibration module, school is carried out to each downlink radio frequency passage for changing information based on the down channel parameters
It is accurate；And each upstream radio-frequency passage is calibrated based on the up channel parameter change information.
Preferably, first acquisition module, specifically for the state of each downlink radio frequency passage to be arranged to send
State, and the state of the calibration mouth is arranged to reception state；
The calibrating sequence signal is sent by each downlink radio frequency passage, and it is described each by the calibration mouth reception
The calibrating sequence signal that downlink radio frequency passage is sent；
Each calibrating sequence signal and the calibrating sequence signal received based on the calibration mouth calculate resulting
Phase and time delay change information as the down channel parameters.
Preferably, second acquisition module, specifically for the state of each upstream radio-frequency passage to be arranged to receive
State, and the state of the calibration mouth is arranged to transmission state；
The calibrating sequence signal is sent by the calibration mouth；And pass through school described in each upstream radio-frequency channel reception
The calibrating sequence signal that quasi- mouth is sent；
Calibrating sequence signal based on each upstream radio-frequency channel reception carries out calculating institute with the calibrating sequence signal
Obtained phase and time delay is as the up channel parameter change information.
Preferably, the down channel parameters change the channel estimation that information is each downlink radio frequency passage；The up letter
Road parameter change information is the channel estimation of each upstream radio-frequency passage；
The calibration module, is specifically used for
Based on formulaAnd formulaIt is it is determined that corresponding
Radio-frequency channel calibration factorWherein, ka=1 ..., Ka, n=1 ..., Msc, n=1 ..., Msc；
WhenFor each downlink radio frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor under each
Row radio-frequency channel calibration factor, school is carried out to each downlink radio frequency passage by each downlink radio frequency passage calibration factor
It is accurate；
WhenFor each upstream radio-frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor on each
Row radio-frequency channel calibration factor, school is carried out to each upstream radio-frequency passage by each upstream radio-frequency passage calibration factor
It is accurate.
Compared with prior art, technical scheme proposed by the invention has advantages below：
Obtain the down channel parameters change that calibrating sequence signal after the calibration mouth is delivered to from each downlink radio frequency passage
Information, and obtain the up channel parameter change that calibrating sequence signal after each upstream radio-frequency passage is delivered to from the calibration oral instructions
Information, the down channel parameters, which change information and the up channel parameter change information, includes phase and time delay, described
Calibrating sequence signal is ZC sequences；Change information based on the down channel parameters and school is carried out to each downlink radio frequency passage
It is accurate；And each upstream radio-frequency passage is calibrated based on the up channel parameter change information；Simplify calibration step
Suddenly, without changing line, all passage calibrations can be just completed, while improve the precision of calibration.
Brief description of the drawings
Fig. 1 is multiple antennas test system configurations connection diagram of the prior art；
Fig. 2 is a kind of schematic flow sheet of Antenna testing system calibration method in the embodiment of the present application；
Fig. 3 is that a kind of multiple antennas test system in the embodiment of the present application calibrates connection diagram；
Fig. 4 is a kind of reception calibrating sequence signal schematic representation in the embodiment of the present application；
Fig. 5 is a kind of transmission calibrating sequence signal schematic representation in the embodiment of the present application；
Fig. 6 is a kind of structural representation of calibrator (-ter) unit in the embodiment of the present application.
Embodiment
In view of the above-mentioned problems existing in the prior art, the present invention proposes a multiple antennas test system calibration method and set
It is standby, calibration steps is simplified, without changing line, all passage calibrations can be just completed, while improve the precision of calibration.
To reach above technical purpose, technical scheme utilizes RRU calibrated channels, it is only necessary to changes a line
(i.e. by the RRU of the base station in multiple antennas test system calibration mouth with the multiple antennas test system be used for connect it is to be calibrated
The radio frequency line of terminal UE be connected), complete the calibration of all passages of test system；Implemented with the 2 couples below in conjunction with the accompanying drawings present invention
Example one is described in detail.
Step 101, the down channel that calibrating sequence signal after the calibration mouth is delivered to from each downlink radio frequency passage is obtained
Parameter change information, and obtain from the calibration oral instructions and be delivered to the up of calibrating sequence signal after each upstream radio-frequency passage
Channel parameter changes information；The down channel parameters, which change information, includes the calibrating sequence signal from each downlink radio frequency passage
Phase and time delay caused by the calibration mouth are delivered to, the up channel parameter change information is believed including the calibrating sequence
Number from it is described calibration oral instructions be delivered to phase and time delay caused by each upstream radio-frequency passage, the calibrating sequence signal can be ZC
Sequence；Wherein, the calibrating sequence signal can be generated by the baseband signal processing unit (BBU) in base station, and ZC sequences are in frequency
Domain has high autocorrelation.
Specifically, it is described obtain from each downlink radio frequency passage be delivered to it is described calibration mouth after calibrating sequence signal it is descending
Channel parameter changes information, is specially：
The state of each downlink radio frequency passage is arranged to transmission state, and the state of the calibration mouth is arranged to
Reception state；The calibrating sequence signal is sent by each downlink radio frequency passage, and by described in the calibration mouth reception
The calibrating sequence signal that each downlink radio frequency passage is sent；Each calibrating sequence signal received based on the calibration mouth and the calibration
Sequence signal calculate resulting phase and time delay as down channel parameters change information.
Specifically, it is that calibrating sequence signal is sent to calibration mouth by each downlink radio frequency passage, then by under each
The down channel calibrating sequence signal and calculated in the calibrating sequence signal that calibration mouth receives that row radio-frequency channel is sent,
And phase and time delay will be calculated and change information as the down channel parameters.
Accordingly, it is described to obtain the up letter that calibrating sequence signal behind each radio-frequency channel is delivered to from the calibration oral instructions
Road parameter change information, it is specially：
The state of each upstream radio-frequency passage is arranged to reception state, and the state of the calibration mouth is arranged to
Transmission state；The calibrating sequence signal is sent by the calibration mouth；And by described in each upstream radio-frequency channel reception
Calibrate the calibrating sequence signal that mouth is sent；Calibrating sequence signal and the calibration sequence based on each upstream radio-frequency channel reception
Column signal calculate resulting phase and time delay as the up channel parameter change information.
Step 102, change information based on the down channel parameters to calibrate each downlink radio frequency passage；And
Each upstream radio-frequency passage is calibrated based on the up channel parameter change information；
Specifically, the down channel parameters change the channel estimation that information is each downlink radio frequency passage；The up letter
Road parameter change information is the channel estimation of each upstream radio-frequency passage；
Wherein, change information based on the down channel parameters to calibrate each downlink radio frequency passage, Yi Jiji
Each upstream radio-frequency passage is calibrated in the up channel parameter change information, is specially：
Based on formulaAnd formulaIt is determined that corresponding penetrate
Frequency passage calibration factorAnd it is based on the radio-frequency channel calibration factorThe radio-frequency channel is calibrated；
Wherein, ka=1 ..., Ka, n=1 ..., Msc, n=1 ..., Msc。
WhenFor each downlink radio frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor under each
Row radio-frequency channel calibration factor, school is carried out to each downlink radio frequency passage by each downlink radio frequency passage calibration factor
It is accurate；
WhenFor each upstream radio-frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor be each
Upstream radio-frequency passage calibration factor, school is carried out to each upstream radio-frequency passage by each upstream radio-frequency passage calibration factor
It is accurate.
Because the line of each radio-frequency channel (including upstream radio-frequency passage and downlink radio frequency passage) is in calibration process and use
Process will not become, so that the transmitting-receiving bidirectional calibration of signal is consistent, configured using one kind, can just calibrate receipts and hair simultaneously, and
And calibration result can mutually compare, transmit-receive position can be adjusted to consistent completely, improve measuring accuracy.
Specifically, after step 102, namely each descending penetrated to described changing information based on the down channel parameters
Frequency passage is calibrated；And each upstream radio-frequency passage is carried out calibrating it based on the up channel parameter change information
Afterwards, in addition to：
The connection of the calibration mouth and the radio frequency line is disconnected, and establishes the connection of the terminal and the radio frequency line.
Specifically, when application scheme just starts, the radio frequency line of terminal to be calibrated is disconnected, so as to which multiple antennas is surveyed
The RRU of base station in test system calibration mouth and the radio frequency line phase for being used to connect terminal UE to be calibrated in multiple antennas test system
Even, therefore the terminal is completed after calibration, it is necessary to recover original connection, namely disconnects the connection of calibration mouth and radio frequency line, and
Establish the connection of the terminal and the radio frequency line；If the other-end also in need calibrated, needs penetrating other-end
Frequency line disconnects, and calibration mouth is connected the radio frequency line of other-end with script and be connected, to proceed by the school to other-end
Quasi- process.
In order to further be illustrated to application scheme, based on specific scene, the embodiment of the present application two discloses one
Kind calibration method, as shown in figure 3, the Remote Radio Unit (RRU) of base station has 8 radio-frequency channels and 1 calibrated channel, its is specific
Step is as follows：
Step 1, the radio frequency line of base stations couple disk (Coup in such as Fig. 1 and Fig. 3) keeps connection, and disconnected end is (in such as Fig. 1
UE1 radio frequency line)；
Step 2, by the radio frequency line of base station RRU calibration mouth and the original radio frequency line company for be connected terminal (UE1 in such as Fig. 1)
Connect；
Step 3, calibration command is issued to base station by computer, base station proceeds by calibration：
Wherein, the baseband signal processing unit in base station (BBU) includes：Calibrating sequence generation module；Radio-frequency channel and school
The transmitting-receiving control module of quasi- passage；Calibration factor computing module；The communication module interacted with control computer；
Step 4, each radio-frequency channel (as shown in figure 3, arriving calibration mouth again by C8_DownLink for Coup mouths) is proceeded by
Transmission calibration.
Specifically, as shown in figure 4, the preferable ZC sequences of calibrating sequence generation module generation frequency domain autocorrelation are as calibration
Sequence signal, it be emission state that transmitting-receiving control module, which sets radio-frequency channel RF1~RF8, calibrates mouth and is arranged to reception state, and by
It is individual that calibrating sequence signal, after calibrated channel receives signal, calibration factor computing module are sent by RF1~RF8 radio-frequency channels
Calculate phase, the time delay of signal；
The obtained phase, time delay are channel estimation in frequency domainAnd it is based on formulaWith
And formula(wherein, ka=1 ..., Ka, n=1 ..., Msc, n=1 ..., Msc) determine
The radio-frequency channel calibration factorIt is determined that radio-frequency channel calibration factorAfterwards, the radio-frequency channel can be based on
Calibration factorSchool is carried out to the radio-frequency channel (as shown in figure 3, arriving calibration mouth again by C8_DownLink for Coup mouths)
It is accurate.
Step 5, each radio-frequency channel (as shown in figure 3, arriving Coup mouths again by C8_UpLink for calibration mouth) is proceeded by
Receive calibration.
Specifically, the reception calibration of each radio-frequency channel is as shown in figure 5, calibrating sequence generation module generates frequency domain autocorrelation
For preferable ZC sequences as calibrating sequence signal, it is reception state that transmitting-receiving control module, which sets radio-frequency channel RF1~RF8, is set
Calibration mouth is transmission state, and calibration mouth sends calibrating sequence signal, RF1~RF8 channel reception calibrating sequence signals, radio-frequency channel
After RF1~RF8 receives signal, calibration factor computing module calculates phase, the time delay of signal.
The obtained phase, time delay are channel estimation in frequency domainAnd it is based on formula
And formula(wherein, ka=1 ..., Ka, n=1 ..., Msc, n=1 ..., Msc) really
The fixed radio-frequency channel calibration factorIt is determined that radio-frequency channel calibration factorAfterwards, can be led to based on the radio frequency
Road calibration factorSchool is carried out to the radio-frequency channel (as shown in figure 3, arriving Coup mouths again by C8_UpLink for calibration mouth)
It is accurate.
Specifically, receiving calibration is similar with foregoing transmission calibration, formula used is the same.
In addition, after calibration completion is carried out to UE1, UE1 radio frequency line connection is returned into state as shown in Figure 1；
If also other equipment, as UE2 need calibrated, its calibrate process it is similar with UE1 calibration, will not be repeated here.
The scheme proposed in the embodiment of the present application two, testing procedure is simple, easy to use, simplifies calibration steps, without
Change line, further, since the line of each radio-frequency channel will not become in calibration process and using process, the result of each radio-frequency channel
Also can keep constant so that the calibration of the transmitting-receiving bidirectional of standard sequence signal is consistent, is the same configuration used, and can school simultaneously
Standard is received can mutually compare with hair and calibration result, so as to improve calibration accuracy.
The embodiment of the present application three also discloses a kind of calibrator (-ter) unit, as shown in fig. 6, including：
First acquisition module 601, the calibrating sequence letter after calibrating mouth is delivered to for obtaining from each downlink radio frequency passage
Number down channel parameters change information, the down channel parameters, which change information, includes the calibrating sequence signal from each descending
Radio-frequency channel is delivered to phase and time delay caused by the calibration mouth；
Second acquisition module 602, sequence is calibrated for obtaining from described calibrate after oral instructions are delivered to each downlink radio frequency passage
The up channel parameter change information of column signal, the up channel parameter change information include the calibrating sequence signal from institute
State calibration oral instructions and be delivered to phase and time delay caused by each upstream radio-frequency passage, the calibrating sequence signal is ZC sequences；
Calibration module 603, each downlink radio frequency passage is carried out for changing information based on the down channel parameters
Calibration；And each upstream radio-frequency passage is calibrated based on the up channel parameter change information.
Specifically, first acquisition module 601, specifically for the state of each downlink radio frequency passage is arranged to send out
State is sent, and the state of the calibration mouth is arranged to reception state；
The calibrating sequence signal is sent by each downlink radio frequency passage, and it is described each by the calibration mouth reception
The calibrating sequence signal that downlink radio frequency passage is sent；
Each calibrating sequence signal and the calibrating sequence signal received based on the calibration mouth calculate resulting
Phase and time delay change information as the down channel parameters.
Second acquisition module 602, specifically for the state of each upstream radio-frequency passage is arranged into reception state,
And the state of the calibration mouth is arranged to transmission state；
The calibrating sequence signal is sent by the calibration mouth；And pass through school described in each upstream radio-frequency channel reception
The calibrating sequence signal that quasi- mouth is sent；
Calibrating sequence signal based on each upstream radio-frequency channel reception carries out calculating institute with the calibrating sequence signal
Obtained phase and time delay is as the up channel parameter change information.
Calibration module 603, is specifically used for：
Based on formulaAnd formulaIt is it is determined that corresponding
Radio-frequency channel calibration factorWherein, ka=1 ..., Ka, n=1 ..., Msc, n=1 ..., Msc；The down channel ginseng
Number changes the channel estimation that information is each downlink radio frequency passage；The up channel parameter change information is each upstream radio-frequency passage
Channel estimation；
WhenFor each downlink radio frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor under each
Row radio-frequency channel calibration factor, school is carried out to each downlink radio frequency passage by each downlink radio frequency passage calibration factor
It is accurate；
WhenFor each upstream radio-frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor on each
Row radio-frequency channel calibration factor, school is carried out to each upstream radio-frequency passage by each upstream radio-frequency passage calibration factor
It is accurate.
Specifically, the calibrator (-ter) unit also includes：Module is established, for disconnecting the company of the calibration mouth and the radio frequency line
Connect, and establish the connection of the terminal and the radio frequency line.
Compared with prior art, technical scheme proposed by the invention has advantages below：
Obtain the down channel parameters change that calibrating sequence signal after the calibration mouth is delivered to from each downlink radio frequency passage
Information, and obtain the up channel parameter change that calibrating sequence signal after each upstream radio-frequency passage is delivered to from the calibration oral instructions
Information, the down channel parameters, which change information and the up channel parameter change information, includes phase and time delay, described
Calibrating sequence signal is ZC sequences；Change information based on the down channel parameters and school is carried out to each downlink radio frequency passage
It is accurate；And each upstream radio-frequency passage is calibrated based on the up channel parameter change information；Simplify calibration step
Suddenly, without changing line, all passage calibrations can be just completed, while improve the precision of calibration.
Through the above description of the embodiments, those skilled in the art can be understood that the application can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also be added by software to realize.Based on such understanding, this Shen
Technical scheme please can be embodied in the form of software product, and the software product can be stored in a non-volatile memories
In medium (can be CD-ROM, USB flash disk, mobile hard disk etc.), including some instructions are causing a computer equipment (can be
Personal computer, server, or network equipment etc.) perform each implement scene of the application described in method.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram for being preferable to carry out scene, module in accompanying drawing or
Flow is not necessarily implemented necessary to the application.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also carry out one or more dresses that respective change is disposed other than this implement scene
In putting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Above-mentioned the application sequence number is for illustration only, does not represent the quality of implement scene.
Disclosed above is only several specific implementation scenes of the application, and still, the application is not limited to this, Ren Heben
What the technical staff in field can think change should all fall into the protection domain of the application.
Claims (8)
1. a kind of multiple antennas test system calibration method, it is characterised in that the RRU's of the base station in the multiple antennas test system
Calibration mouth is connected with being used to connect the radio frequency line of terminal UE to be calibrated in the multiple antennas test system, and methods described includes：
Obtain from each downlink radio frequency passage be delivered to it is described calibration mouth after calibrating sequence signal down channel parameters change information,
And the up channel parameter change information that calibrating sequence signal after each upstream radio-frequency passage is delivered to from the calibration oral instructions is obtained,
The down channel parameters change information and are delivered to the calibration mouth from each downlink radio frequency passage including the calibrating sequence signal
Caused phase and time delay, the up channel parameter change information include the calibrating sequence signal from the calibration oral instructions
It is delivered to phase and time delay caused by each upstream radio-frequency passage；
Change information based on the down channel parameters to calibrate each downlink radio frequency passage, and based on described up
Channel parameter changes information and each upstream radio-frequency passage is calibrated.
2. the method as described in claim 1, it is characterised in that the acquisition is delivered to the calibration from each downlink radio frequency passage
The down channel parameters of calibrating sequence signal after mouthful change information, are specially：
The state of each downlink radio frequency passage is arranged to transmission state, and the state of the calibration mouth is arranged to receive
State；
The calibrating sequence signal is sent by each downlink radio frequency passage, and it is described each descending by the calibration mouth reception
The calibrating sequence signal that radio-frequency channel is sent；
Each calibrating sequence signal received based on the calibration mouth carries out calculating resulting phase with the calibrating sequence signal
And time delay changes information as the down channel parameters.
3. the method as described in claim 1, it is characterised in that described obtain from the calibration oral instructions is delivered to described each up penetrate
The up channel parameter change information of calibrating sequence signal after frequency passage, it is specially：
The state of each upstream radio-frequency passage is arranged to reception state, and the state of the calibration mouth is arranged to send
State；
The calibrating sequence signal is sent by the calibration mouth；And by calibrating mouth described in each upstream radio-frequency channel reception
The calibrating sequence signal of transmission；
Obtained by calibrating sequence signal based on each upstream radio-frequency channel reception is calculated with the calibrating sequence signal
Phase and time delay as the up channel parameter change information.
4. the method as described in claim 1, it is characterised in that it is that each downlink radio frequency leads to that the down channel parameters, which change information,
The channel estimation in road；The up channel parameter change information is the channel estimation of each upstream radio-frequency passage；
Wherein, change information based on the down channel parameters to calibrate each downlink radio frequency passage, and based on institute
State up channel parameter change information to calibrate each upstream radio-frequency passage, be specially：
Based on formula
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</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>n</mi>
<mo>)</mo>
</mrow>
<mo>|</mo>
</mrow>
<mn>2</mn>
</msup>
<mo>,</mo>
</mrow>
And formula
<mrow>
<msubsup>
<mi>W</mi>
<mi>n</mi>
<mi>AC</mi>
</msubsup>
<mo>=</mo>
<mo>[</mo>
<msubsup>
<mi>w</mi>
<mrow>
<mn>1</mn>
<mo>,</mo>
<mi>n</mi>
</mrow>
<mi>AC</mi>
</msubsup>
<mo>,</mo>
<mo>.</mo>
<mo>.</mo>
<mo>.</mo>
<mo>,</mo>
<msubsup>
<mi>w</mi>
<mrow>
<msub>
<mi>k</mi>
<mi>a</mi>
</msub>
<mo>,</mo>
<mi>n</mi>
</mrow>
<mi>AC</mi>
</msubsup>
<mo>,</mo>
<mo>.</mo>
<mo>.</mo>
<mo>.</mo>
<mo>,</mo>
<msubsup>
<mi>w</mi>
<mrow>
<msub>
<mi>K</mi>
<mi>a</mi>
</msub>
<mo>,</mo>
<mi>n</mi>
</mrow>
<mi>AC</mi>
</msubsup>
<mo>]</mo>
</mrow>
It is determined that corresponding radio frequency leads to
Road calibration factor wherein, ka=1 ..., Ka, n=1 ..., Msc, n=1 ..., Msc；
WhenFor each downlink radio frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor descending penetrated to be each
Frequency passage calibration factor, each downlink radio frequency passage is calibrated by each downlink radio frequency passage calibration factor；
WhenFor each upstream radio-frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor up penetrated to be each
Frequency passage calibration factor, each upstream radio-frequency passage is calibrated by each upstream radio-frequency passage calibration factor.
A kind of 5. calibrator (-ter) unit, it is characterised in that including：
First acquisition module, for obtain from each downlink radio frequency passage be delivered to it is described calibration mouth after calibrating sequence signal it is descending
Channel parameter changes information, and the down channel parameters, which change information, includes the calibrating sequence signal from each downlink radio frequency passage
It is delivered to phase and time delay caused by the calibration mouth；
Second acquisition module, the up of calibrating sequence signal after each upstream radio-frequency passage is delivered to for obtaining from the calibration oral instructions
Channel parameter changes information, and the up channel parameter change information includes the calibrating sequence signal and passed from the calibration oral instructions
To phase and time delay caused by each upstream radio-frequency passage, the calibrating sequence signal is ZC sequences；
Calibration module, each downlink radio frequency passage is calibrated for changing information based on the down channel parameters；With
And each upstream radio-frequency passage is calibrated based on the up channel parameter change information.
6. equipment as claimed in claim 5, it is characterised in that
First acquisition module, specifically for the state of each downlink radio frequency passage is arranged into transmission state, and will
The state of the calibration mouth is arranged to reception state；
The calibrating sequence signal is sent by each downlink radio frequency passage, and it is described each descending by the calibration mouth reception
The calibrating sequence signal that radio-frequency channel is sent；
Each calibrating sequence signal received based on the calibration mouth carries out calculating resulting phase with the calibrating sequence signal
And time delay changes information as the down channel parameters.
7. equipment as claimed in claim 5, it is characterised in that
Second acquisition module, specifically for the state of each upstream radio-frequency passage is arranged into reception state, and will
The state of the calibration mouth is arranged to transmission state；
The calibrating sequence signal is sent by the calibration mouth；And by calibrating mouth described in each upstream radio-frequency channel reception
The calibrating sequence signal of transmission；
Obtained by calibrating sequence signal based on each upstream radio-frequency channel reception is calculated with the calibrating sequence signal
Phase and time delay as the up channel parameter change information.
8. equipment as claimed in claim 5, it is characterised in that
The down channel parameters change the channel estimation that information is each downlink radio frequency passage；The up channel parameter change letter
Cease for the channel estimation of each upstream radio-frequency passage；
The calibration module, is specifically used for
Based on formula
<mrow>
<msubsup>
<mi>w</mi>
<mrow>
<msub>
<mi>k</mi>
<mi>a</mi>
</msub>
<mo>,</mo>
<mi>n</mi>
</mrow>
<mi>AC</mi>
</msubsup>
<mo>=</mo>
<msubsup>
<mover>
<mi>H</mi>
<mo>~</mo>
</mover>
<msub>
<mi>k</mi>
<mi>a</mi>
</msub>
<mo>*</mo>
</msubsup>
<mrow>
<mo>(</mo>
<mi>n</mi>
<mo>)</mo>
</mrow>
<mo>/</mo>
<msup>
<mrow>
<mo>|</mo>
<msub>
<mover>
<mi>H</mi>
<mo>~</mo>
</mover>
<msub>
<mi>k</mi>
<mi>a</mi>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>n</mi>
<mo>)</mo>
</mrow>
<mo>|</mo>
</mrow>
<mn>2</mn>
</msup>
<mo>,</mo>
</mrow>
And formula
<mrow>
<msubsup>
<mi>W</mi>
<mi>n</mi>
<mi>AC</mi>
</msubsup>
<mo>=</mo>
<mo>[</mo>
<msubsup>
<mi>w</mi>
<mrow>
<mn>1</mn>
<mo>,</mo>
<mi>n</mi>
</mrow>
<mi>AC</mi>
</msubsup>
<mo>,</mo>
<mo>.</mo>
<mo>.</mo>
<mo>.</mo>
<mo>,</mo>
<msubsup>
<mi>w</mi>
<mrow>
<msub>
<mi>k</mi>
<mi>a</mi>
</msub>
<mo>,</mo>
<mi>n</mi>
</mrow>
<mi>AC</mi>
</msubsup>
<mo>,</mo>
<mo>.</mo>
<mo>.</mo>
<mo>.</mo>
<mo>,</mo>
<msubsup>
<mi>w</mi>
<mrow>
<msub>
<mi>K</mi>
<mi>a</mi>
</msub>
<mo>,</mo>
<mi>n</mi>
</mrow>
<mi>AC</mi>
</msubsup>
<mo>]</mo>
</mrow>
It is determined that corresponding radio frequency
Passage calibration factor wherein, ka=1 ..., Ka, n=1 ..., Msc, n=1 ..., Msc；
WhenFor each downlink radio frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor descending penetrated to be each
Frequency passage calibration factor, each downlink radio frequency passage is calibrated by each downlink radio frequency passage calibration factor；
WhenFor each upstream radio-frequency passage channel estimation when, it is determined that corresponding radio-frequency channel calibration factor up penetrated to be each
Frequency passage calibration factor, each upstream radio-frequency passage is calibrated by each upstream radio-frequency passage calibration factor.
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| CN104618930B true CN104618930B (en) | 2018-02-02 |
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| JP7014384B2 (en) * | 2016-05-31 | 2022-02-01 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | Methods and equipment for calibrating channels between wireless remote units (RRUs) |
| CN108112021B (en) * | 2016-11-24 | 2021-01-22 | 大唐移动通信设备有限公司 | Method and device for returning radio frequency channel detection data |
| CN110412527B (en) * | 2019-08-02 | 2021-12-14 | 南京三航信息工程有限公司 | Multi-channel broadband rapid calibration device and rapid calibration method |
| CN110518990B (en) * | 2019-08-19 | 2021-10-22 | 深圳创维数字技术有限公司 | Calibration method, system and computer readable storage medium for multi-antenna WiFi product |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1384989A (en) * | 1999-10-26 | 2002-12-11 | 西门子公司 | Method for jcalibrating electronically phase-controlled group antenna in radio-communications systems |
| CN101383647A (en) * | 2007-09-06 | 2009-03-11 | 大唐移动通信设备有限公司 | Method and device for calibrating operation antenna |
| CN102035611A (en) * | 2010-12-29 | 2011-04-27 | 武汉邮电科学研究院 | Remote radio unit multi-antenna real-time calibration system and method |
| CN103378886A (en) * | 2012-04-13 | 2013-10-30 | 中国移动通信集团公司 | RRU antenna calibration method, apparatus and system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8102785B2 (en) * | 2008-05-21 | 2012-01-24 | Alcatel Lucent | Calibrating radiofrequency paths of a phased-array antenna |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1384989A (en) * | 1999-10-26 | 2002-12-11 | 西门子公司 | Method for jcalibrating electronically phase-controlled group antenna in radio-communications systems |
| CN101383647A (en) * | 2007-09-06 | 2009-03-11 | 大唐移动通信设备有限公司 | Method and device for calibrating operation antenna |
| CN102035611A (en) * | 2010-12-29 | 2011-04-27 | 武汉邮电科学研究院 | Remote radio unit multi-antenna real-time calibration system and method |
| CN103378886A (en) * | 2012-04-13 | 2013-10-30 | 中国移动通信集团公司 | RRU antenna calibration method, apparatus and system |
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