CN103916176B - A kind of wireless discharging-directly station and its antenna calibration method - Google Patents
A kind of wireless discharging-directly station and its antenna calibration method Download PDFInfo
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- CN103916176B CN103916176B CN201310001452.7A CN201310001452A CN103916176B CN 103916176 B CN103916176 B CN 103916176B CN 201310001452 A CN201310001452 A CN 201310001452A CN 103916176 B CN103916176 B CN 103916176B
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Abstract
A kind of wireless discharging-directly station of present invention offer and its antenna calibration method, are related to the communications field.Wireless discharging-directly station includes：Downlink receives and dispatches access, for the signal of base station to be sent to user terminal；Uplink receives and dispatches access, for the signal of user terminal to be sent to base station；Calibration hair channel receives and dispatches access with downlink and uplink transmitting-receiving access is connect, is used for transmission a calibration signal and receives and dispatches access to downlink transmitting-receiving access or uplink；Channel is received in calibration, receives and dispatches access with downlink and uplink transmitting-receiving access is connect, be used for transmission the signal for receiving and dispatching tunnel by downlink transmitting-receiving access or uplink；Processor is received channel with calibration and is connect, the signal for receiving channel output according to calibration, obtains the penalty coefficient of the response coefficient of compensation downlink transmitting-receiving access or uplink transmitting-receiving access.The present invention solves the problems, such as that wireless discharging-directly station generates the reciprocity of uplink and downlink channel and destroys this.
Description
Technical field
The present invention relates to the communications field, a kind of wireless discharging-directly station and its antenna calibration method are particularly related to.
Background technology
Since wireless signal is decayed with the increase of propagation distance, Cell Edge User and blind area user by
Weaker in signal, performance is poor.In order to solve weak covering and depth covering problem, it is widely used for directly putting in current 2G is now netted
Improvement of standing covers.According to application scenarios, repeater can be divided into indoor repeater and outdoor repeater station.
Wireless discharging-directly station is a kind of same frequency relay station directly amplified to mobile communication signal.It does not change the frequency of original signal
Rate does not also make any processing to the information entrained by signal.
In gsm system, uplink signal and downlink signal use different frequency ranges respectively, that is, use the duplex mode of FDD.
Because the frequency range of uplink signal and downlink signal is different from direction, required signal strength is also different, therefore repeater is necessary
Has the ability being respectively processed to uplink and downlink signals, i.e. it is logical that two sets of independent transmitting-receivings are respectively adopted in uplink and downlink signal
Road.The structure of the wireless discharging-directly station used in gsm system at present is as shown in Figure 1, its downlink transmitting-receiving access and uplink receive and dispatch access
Include：Low noise, frequency range frequency-selecting and attacking is put.
In TD-LTE system, as a result of the duplex mode (TDD) of time-division, the same propagation channel of transmit-receive sharing
(frequency is also identical), theoretically it is believed that up channel is equal to down channel, i.e. up channel and down channel has reciprocity.
Just because of this, the transmitting terminal in TDD system (such as base station) is sent to uplink pilot signal using user and detects that uplink is believed
Road obtains down channel in turn, and carries out beamforming transmission, such as the mono- streams of TM7 in TD-LTE system, TM8 stream transmissions etc..
However, in physics realization, the radio-frequency head of each antenna element needs two sets of circuits to be respectively completed the hair of signal
It send and receives, as shown in Figure 2：
Actual downstream channel HDLFor：
HDL=RUE·H·TBS
Actual uplink channel HULFor：
HUL=RBS·HT·TUE
And base station is using the down channel that uplink and downlink reciprocity obtains：
Wherein, RBSAnd TUEDiagonal matrix, diagonal entry indicate respectively reception complex gain in each antenna element of BS and
Transmission complex gain in each antenna element of user terminal (UE).T indicates that sendaisle, R indicate that receiving channel, subscript BS indicate
Base station side, subscript UE indicates the sides UE.NUEAnd NBSThe antenna array subnumber of user and base station are indicated respectively,Indicate the transceiver channel mismatching of i-th of antenna element at the ends UE,Indicate the transceiver channel coefficient ratio of i-th of antenna element at the ends BS.It indicates using upper
The down channel that down channel reciprocity obtains is not equal to actual down channel.
In order to obtain descending channel information using the up channel of detection, the antenna to base station end and user terminal is needed
A period of time is calibrated, as shown in Figure 4.
It is by being multiplied by one respectively in the receipts channel of base station end and the antenna element of user terminal or hair channel that it, which calibrates target,
A compensation for calibrating errors coefficient, so that the transceiver channel coefficient ratio of each antenna element is consistent after calibration.It can meet：
Wherein,Indicate the compensation for calibrating errors coefficient of i-th of antenna element of base station end,Indicate the i-th of user terminal
The compensation for calibrating errors coefficient of a antenna element,Representation formula all sets up arbitrary i-th of antenna element.In fact, user terminal
Antenna mismatch the pretreatment of the downlink of base station end is influenced it is limited.Therefore, can school only be carried out to base station end antenna element in practice
Accurate approximate realization uplink and downlink channel reciprocity.
Antenna calibration is widely used in current TD-SCDMA system to ensure the acquisition of channel reciprocity, it is therein
Calibration program is as shown in Figure 3：
Calibration program needs assist to carry out radio-frequency receiving-transmitting passage consistency calibration there are one calibration port.
1) antenna transceiver channel coefficient uses r respectivelyjAnd tjIt indicates.Wherein, subscript j (0~N) indicates j-th of antenna, j=0
Indicate calibration port.
2) x is usedjkIndicate the calibration signal that k-th of antenna that j-th of antenna receives is sent.
3) antenna hair channel, receipts channel compensation coefficient use α respectivelyj、βjIt indicates, wherein subscript j (0~N) is indicated j-th day
Line, j=0 indicate calibration port.
Assuming that using first antenna as reference antenna, calibration flow is：
A) each antenna transmission channel calibration：
A.1) calibration signal s is sent from the transmission channel of each antenna；
A.2) and then from the receiving channel of calibration port calibration signal x is withdrawn01=r0t1s,...,x0N=r0tNs；
A.3 the calibration factor of each antenna transmission channel) is estimated, the calibration to transmitter unit is completed.
B) each antenna receiving channel calibration：
B.1) calibration signal s is sent from calibration transmission channel；
B.2) and then from the receiving channel of each antenna calibration signal x is withdrawn10=r1t0s,...,xN0=rNt0s；
B.3 the calibration factor of each antenna receiving path) is estimated, the calibration to receiving unit is completed.
Obtain αj、βj。
Wherein, calibration signal processing unit can be located at the sides BBU, can also be located at the sides RRU.
The processing of existing repeater uplink and downlink signals generally uses independent transmitting-receiving access, as shown in figure 1 above, in TD-
Between eNB and UE in LTE system, uplink and downlink signals have passed through different transmitting-receiving accesses, uplink signal amplification regeneration be by
Uplink receives and dispatches access, and downlink signal amplification regeneration is to receive and dispatch access by downlink, since the response of its circuit is different, leads to TDD's
Signal reciprocity no longer meets.However, due to repeater be to network it is transparent, i.e. eNB and UE do not know in system whether
It is mounted with repeater.If eNB uses the transmission mode of the mono- stream wave beam formings of TM7 or TM8 dual-stream beamformings, but due to this
When TDD system channel reciprocity destroyed by repeater, cause accurately estimate down channel according to up channel, thus
Its performance can difference in change.In current TD-LTE system only have base station end carry out antenna calibration be can not ensure install repeater it
Still meet channel reciprocity requirement afterwards.
Existing antenna calibration scheme calibrates hair access and receipts access respectively, logical to be received and dispatched between each antenna after satisfaction calibration
The consistent requirement of the response coefficient ratio on road.And the alignment requirements of wireless discharging-directly station are to meet entire uplink transmitting-receiving access and whole
The absolute value of the response of a downlink transmitting-receiving access is consistent, thus structure (calibration antenna and the calibration network of existing antenna calibration
Structure, as shown in Figure 3) can not be applied directly to above wireless discharging-directly station.
Invention content
The technical problem to be solved in the present invention is to provide a kind of wireless discharging-directly station and its antenna calibration methods, can be wireless
Antenna is calibrated at repeater, to ensure the reciprocity of TDD uplink and downlink channels.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of wireless discharging-directly station, including：
Downlink receives and dispatches access, for the signal of base station to be sent to user terminal；
Uplink receives and dispatches access, for the signal of the user terminal to be sent to base station；
Calibration hair channel receives and dispatches access with the downlink and uplink transmitting-receiving access is connect, is used for transmission a calibration
Signal receives and dispatches access to downlink transmitting-receiving access or the uplink；
Channel is received in calibration, receives and dispatches access with the downlink and uplink transmitting-receiving access is connect, be used for transmission by institute
State the signal of downlink transmitting-receiving access or uplink transmitting-receiving tunnel；
Processor, receives channel with the calibration and connect, and the signal for receiving channel output according to the calibration obtains compensation
The penalty coefficient of the response coefficient of the downlink transmitting-receiving access or uplink transmitting-receiving access.
Wherein, the calibration hair channel is received and dispatched by splitter, the first coupler and first annular device and the downlink
Access is connected with uplink transmitting-receiving access；
The calibration receive channel by combiner, the second coupler and the second circulator and the downlink receive and dispatch access and
The uplink transmitting-receiving access connection.
Wherein, first coupler is with first antenna for connecting, and receives the signal of the base station, and by the base station
Signal access and the second antenna received and dispatched by the downlink are sent to user terminal；Second coupler is used for and second day
Line connects, and receives the signal of the user terminal, and the signal of the user terminal is received and dispatched access and the by the uplink
One antenna is sent to the base station.
Wherein, the downlink transmitting-receiving access includes：Downlink receives channel, and receives channel sequence with the downlink and connect down
Row hair channel；
The uplink receives and dispatches access：Uplink receives channel, and receives the uplink that channel sequence is connect with the uplink and send out
Channel；
The downlink receives channel and uplink hair channel connect with the first annular device, the downlink hair channel with
The uplink is received channel and is connect with second circulator.
Wherein, the wireless discharging-directly station of the present embodiment further includes：
Compensating unit connect with the processor, downlink transmitting-receiving access and uplink transmitting-receiving access, is used for basis
The penalty coefficient of the downlink transmitting-receiving access carries out signal compensation to downlink transmitting-receiving access or is received and dispatched according to the uplink
The penalty coefficient of access carries out signal compensation to uplink transmitting-receiving access.
Wherein, the compensating unit includes：
The first multiplier being set on the downlink transmitting-receiving access, the penalty coefficient for the downlink to be received and dispatched to access
With the signal multiplication from the base station, and the signal that will be obtained after multiplication, by the downlink receive and dispatch access be sent to it is described
User terminal；
The second multiplier being set on the uplink transmitting-receiving access, the penalty coefficient for the uplink to be received and dispatched to access
With the signal multiplication from the user terminal, and the signal that will be obtained after multiplication is received and dispatched access by the uplink and is sent to
The base station.
Wherein, the signal of calibration receipts channel output includes：The calibration signal by the downlink transmitting-receiving access with
And the calibration receives the first signal exported behind channel and the calibration signal by uplink transmitting-receiving access and the school
Standard receives the second signal exported behind channel；
Wherein, the first signal sDLFor：sDL=rCAL·tDL·rDL·tCAL·s0；
The second signal sULFor：sUL=rCAL·tUL·rUL·tCAL·s0；Wherein,
tDLIt is the response coefficient in downlink hair channel, tULIt is the response coefficient in uplink hair channel, rDLUnder being described
Row receives the response coefficient in channel, rULIt is the response coefficient that the uplink receives channel, tCALIt is the response system in calibration hair channel
Number, rCALIt is the response coefficient that channel is received in the calibration, s0The signal that calibration hair channel is sent out；
The processor is when the penalty coefficient that the downlink receives and dispatches access is 1, according to formula kUL=sDL/sUL, obtain and mend
Repay the penalty coefficient k of the uplink transmitting-receiving accessUL。。
Also a kind of antenna calibration method of wireless discharging-directly station of the embodiment of the present invention, the wireless discharging-directly station include：Downlink
It receives and dispatches access and uplink receives and dispatches access；The method includes：
It transmits a calibration signal and receives and dispatches access or uplink transmitting-receiving access to downlink；
It obtains the calibration signal and receives channel output by a calibration hair channel, downlink transmitting-receiving access and a calibration
Signal or the calibration signal by the calibration hair channel, the uplink transmitting-receiving access and the calibration receipts channel
The signal of output；
The signal that channel output is received according to the calibration obtains and compensates the downlink transmitting-receiving access or uplink transmitting-receiving
The penalty coefficient of the response coefficient of access.
Wherein, the penalty coefficient for the response coefficient for compensating the downlink transmitting-receiving access or uplink transmitting-receiving access is obtained
After further include：
According to the downlink receive and dispatch access penalty coefficient to the downlink transmitting-receiving access carry out signal compensation or according to
The penalty coefficient of the uplink transmitting-receiving access carries out signal compensation to uplink transmitting-receiving access.
Wherein, the penalty coefficient that access is received and dispatched according to the downlink carries out the downlink transmitting-receiving access step of signal compensation
Suddenly include：
The downlink received and dispatched to penalty coefficient and the signal multiplication from the base station of access, and will be obtained after multiplication
Signal receives and dispatches access by the downlink and is sent to the user terminal.
Wherein, the penalty coefficient that access is received and dispatched according to the uplink carries out the uplink transmitting-receiving access step of signal compensation
Suddenly include：The penalty coefficient and the signal multiplication from the user terminal that the uplink is received and dispatched into access, and obtained after being multiplied
The signal arrived receives and dispatches access by the uplink and is sent to the base station.
Wherein, the signal of calibration receipts channel output includes：The calibration signal by the downlink transmitting-receiving access with
And the calibration receives the first signal exported behind channel and the calibration signal by uplink transmitting-receiving access and the school
Standard receives the second signal exported behind channel；Wherein,
The first signal sDLFor：sDL=rCAL·tDL·rDL·tCAL·s0；
The second signal sULFor：sUL=rCAL·tUL·rUL·tCAL·s0；Wherein,
tDLIt is the response coefficient in downlink hair channel, tULIt is the response coefficient in uplink hair channel, rDLUnder being described
Row receives the response coefficient in channel, rULIt is the response coefficient that the uplink receives channel, tCALIt is the response system in calibration hair channel
Number, rCALIt is the response coefficient that channel is received in the calibration, s0The signal that calibration hair channel is sent out；
Obtaining the step of compensation uplink receives and dispatches the penalty coefficient of access includes：
When the penalty coefficient that the downlink receives and dispatches access is 1, according to formula kUL=sDL/sULIt obtains and compensates the uplink
Receive and dispatch the penalty coefficient of access.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
The prior art is compared, the present invention carries out school at wireless discharging-directly station to uplink transceiver channel and downlink transceiver channel
Standard solves in TD-LTE system due to being introduced directly into wireless straight-through station, is generated to the reciprocity of TDD uplink and downlink channels and destroy this
One problem.
Description of the drawings
Fig. 1 is the structural schematic diagram of wireless discharging-directly station in the prior art；
Fig. 2 is the schematic diagram that base station carries out signal correction with client terminal in the prior art；
Fig. 3 is that radio frequency remoto module realizes self-alignment structural schematic diagram in the prior art；
Fig. 4 is the structural schematic diagram of the wireless discharging-directly station of the present invention；
Fig. 5 is the flow diagram of the antenna calibration method of the present invention.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Embodiment 1
A kind of wireless discharging-directly station, including：
Downlink receives and dispatches access, for the signal of base station to be sent to user terminal；
Uplink receives and dispatches access, for the signal of the user terminal to be sent to base station；
Calibration hair channel receives and dispatches access with the downlink and uplink transmitting-receiving access is connect, is used for transmission a calibration
Signal receives and dispatches access to downlink transmitting-receiving access or the uplink；
Channel is received in calibration, receives and dispatches access with the downlink and uplink transmitting-receiving access is connect, be used for transmission by institute
State the signal of downlink transmitting-receiving access or uplink transmitting-receiving tunnel；
Processor, receives channel with the calibration and connect, and the signal for receiving channel output according to the calibration obtains compensation
The penalty coefficient of the response coefficient of the downlink transmitting-receiving access or uplink transmitting-receiving access.
This programme calibrates uplink transceiver channel and downlink transceiver channel at wireless discharging-directly station, solves TD-
Due to being introduced directly into wireless straight-through station in LTE system, the reciprocity of TDD uplink and downlink channels is led to the problem of and destroys this.
As shown in figure 4, (wireless discharging-directly station of multiple antennas can direct class by taking the wireless discharging-directly station of single antenna as an example below
Push away), the structure of this programme is specifically described：
It is compared with traditional repeater, the present invention needs to increase calibration hair channel and channel is received in calibration.In addition, calibration network
The requirement to be met is：Uplink receipts channel is arrived in calibration hair channel respectively and the path responses of downlink receipts channel process are identical, uplink
It is identical that the path responses that calibration receipts channel is passed through are arrived in hair channel and downlink hair channel respectively.
Wherein, access is received and dispatched in calibration hair channel by splitter, the first coupler and first annular device and the downlink
It is connected with uplink transmitting-receiving access；Calibration receive channel by combiner, the second coupler and the second circulator with it is described under
Row transmitting-receiving access is connected with uplink transmitting-receiving access.
First coupler receives the signal of the base station for being connect with first antenna, and by the letter of the base station
Number receiving and dispatching access and the second antenna by the downlink is sent to user terminal；
Second coupler receives the signal of the user terminal for being connect with the second antenna, and by the user
The signal of terminal receives and dispatches access by the uplink and first antenna is sent to the base station.
The downlink receives and dispatches access：Downlink receives channel, and receives the downlink that channel sequence is connect with the downlink and send out
Channel；
The uplink receives and dispatches access：Uplink receives channel, and receives the uplink that channel sequence is connect with the uplink and send out
Channel；
The downlink receives channel and uplink hair channel connect with the first annular device, the downlink hair channel with
The uplink is received channel and is connect with second circulator.
The wireless discharging-directly station of this programme further includes：
Compensating unit connect with the processor, downlink transmitting-receiving access and uplink transmitting-receiving access, is used for basis
The penalty coefficient of the downlink transmitting-receiving access carries out signal compensation to downlink transmitting-receiving access or is received and dispatched according to the uplink
The penalty coefficient of access carries out signal compensation to uplink transmitting-receiving access.
Specifically, the compensating unit includes：
The first multiplier being set on the downlink transmitting-receiving access, and be connected to the processor, obtain processor hair
The penalty coefficient for down going channel sent, and the penalty coefficient that the downlink is received and dispatched into access and the signal from the base station
It is multiplied, and the signal that will be obtained after multiplication, receiving and dispatching access by the downlink is sent to the user terminal；And it is set to institute
The second multiplier on uplink transmitting-receiving access is stated, is also connected to the processor, obtain processor transmission is directed to data feedback channel
Penalty coefficient, and the uplink is received and dispatched to penalty coefficient and the signal multiplication from the user terminal of access, and by phase
The signal obtained after multiplying receives and dispatches access by the uplink and is sent to the base station.It is pointed out that first multiplier
It can be located at before downlink receipts channel, downlink can also be located at and received between channel and downlink hair channel, downlink hair is may be located on
After channel；Second multiplier can be located at before uplink receipts channel, can also be located at uplink receipts channel and lead to uplink hair
Between road, it may be located on after uplink hair channel.
In the above-described embodiments, the signal of calibration receipts channel output includes：The calibration signal passes through the downlink
Transmitting-receiving access and the calibration receive the first signal exported behind channel and the calibration signal and receive and dispatch access by the uplink
And the second signal exported behind channel is received in the calibration；
Specifically：Channel, which is sent out, by calibration receives channel transmission calibration signal s to downlink0, channel, downlink hair are received by downlink
Channel, it is s finally to receive the signal exported at channel in calibrationDL(i.e. the first signal)；
Wherein, sDL=rCAL·tDL·rDL·tCAL·s0。
Channel, which is sent out, by calibration receives the same calibration signal s of channel transmission to uplink0, channel, uplink hair are received by uplink
Channel, it is s finally to receive the signal exported at channel in calibrationUL(i.e. second signal)；
Wherein, sUL=rCAL·tUL·rUL·tCAL·s0。
The processor is received and dispatched in the downlink when penalty coefficient of access is 1 (on the basis of receiving and dispatching access by downlink),
According to formula kUL=sDL/sUL, obtain the penalty coefficient k for compensating the uplink transmitting-receiving accessUL；
Certainly, when the penalty coefficient that uplink receives and dispatches access is 1 (on the basis of receiving and dispatching access by uplink), the processor
It can be according to formula kDL=SUL/SDL, obtain the penalty coefficient k of the downlink transmitting-receiving accessDL。
Wherein, tDLIt is the response coefficient in downlink hair channel, tULIt is the response coefficient in uplink hair channel, rDLIt is
The downlink receives the response coefficient in channel, rULIt is the response coefficient that the uplink receives channel, tCALIt is the sound in calibration hair channel
Answer coefficient, rCALIt is the response coefficient that channel is received in the calibration, s0The calibration signal that calibration hair channel is sent out；
It when base station sends out downlink signal, is received by first antenna, receives and dispatches access by downlink, at this time the first multiplier,
The downlink is received and dispatched to the penalty coefficient k of accessDLIt is multiplied with the downlink signal, completes the compensation of downlink signal, and will be multiplied
The signal obtained afterwards receives and dispatches access by the downlink and the second antenna is sent to user terminal；
It when user terminal sends out uplink signal, is received by the second antenna, receives and dispatches access by uplink, at this time the second multiplication
The uplink is received and dispatched the penalty coefficient k of access by deviceULIt is multiplied with the uplink signal, completes the compensation of uplink signal, and by phase
The signal obtained after multiplying receives and dispatches access by the uplink and first antenna is sent to the base station.
The wireless discharging-directly station of the present embodiment by calibration receive channel and calibration hair channel to uplink transceiver channel and under
Row transceiver channel is calibrated, and is solved due to being introduced directly into wireless straight-through station in TD-LTE system, to TDD uplink and downlink channels
Reciprocity, which is led to the problem of, destroys this.Further, what the first multiplier acquisition processor was sent is directed to downlink transceiver channel
The downlink signal that base station is sent is multiplied by penalty coefficient with the penalty coefficient；And second multiplier obtain processor send
For the penalty coefficient of uplink transceiver channel, the uplink signal that user terminal is sent is multiplied with the penalty coefficient, to complete
The signal compensation of wireless discharging-directly station.
Embodiment 2
As shown in figure 5, a kind of antenna calibration method of wireless discharging-directly station, the wireless discharging-directly station include：Downlink transmitting-receiving is logical
Road and uplink receive and dispatch access；Described method includes following steps：
Step 1, one calibration signal of transmission receives and dispatches access to downlink or uplink receives and dispatches access；
Step 2, obtain the calibration signal by a calibration send out channel, downlink transmitting-receiving access and a calibration receive it is logical
The signal of road output or the calibration signal are by calibration hair channel, uplink transmitting-receiving access and the calibration
Receive the signal of channel output；
Step 3, the signal that channel output is received according to the calibration, obtain compensate downlink transmitting-receiving access or it is described on
The penalty coefficient of the response coefficient of row transmitting-receiving access.
This programme calibrates antenna at wireless discharging-directly station, avoids wireless due to being introduced directly into TD-LTE system
Straight-through station generates destruction to the reciprocity of TDD uplink and downlink channels.
Wherein, the penalty coefficient for the response coefficient for compensating the downlink transmitting-receiving access or uplink transmitting-receiving access is obtained
After can also include：
The penalty coefficient that access is received and dispatched according to the downlink carries out signal compensation (i.e. downlink receipts to downlink transmitting-receiving access
The penalty coefficient and the signal multiplication from the base station for sending out access, and the signal that will be obtained after multiplication, are received by the downlink
Hair access be sent to the user terminal) or according to the uplink receive and dispatch access penalty coefficient to the uplink receive and dispatch access
Progress signal compensation (i.e. the penalty coefficient of uplink transmitting-receiving access and the signal multiplication from the user terminal, and will be after multiplication
Obtained signal receives and dispatches access by the uplink and is sent to the base station).
When specific compensation, the signal that channel output is received in the calibration includes：The calibration signal is received and dispatched by the downlink
Access and the calibration receive behind channel the first signal for exporting and the calibration signal by uplink transmitting-receiving access and
The second signal exported behind channel is received in the calibration；
Specifically：Channel, which is sent out, by calibration receives channel transmission calibration signal s to downlink0, channel, downlink hair are received by downlink
Channel, it is s finally to receive the signal exported at channel in calibrationDL(i.e. the first signal)；
Wherein, sDL=rCAL·tDL·rDL·tCAL·s0。
Channel, which is sent out, by calibration receives the same calibration signal s of channel transmission to uplink0, channel, uplink hair are received by uplink
Channel, it is s finally to receive the signal exported at channel in calibrationUL(i.e. second signal)；
Wherein, sUL=rCAL·tUL·rUL·tCAL·s0。
When the penalty coefficient that the downlink receives and dispatches access is 1 (on the basis of receiving and dispatching access by downlink), according to formula kUL
=sDL/sUL, obtain the penalty coefficient k for compensating the uplink transmitting-receiving accessUL；
It certainly, can also basis when the penalty coefficient that uplink receives and dispatches access is 1 (on the basis of receiving and dispatching access by uplink)
Formula kDL=SUL/SDL, obtain the penalty coefficient k of the downlink transmitting-receiving accessDL。。
tDLIt is the response coefficient in downlink hair channel, tULIt is the response coefficient in uplink hair channel, rDLUnder being described
Row receives the response coefficient in channel, rULIt is the response coefficient that the uplink receives channel, tCALIt is the response system in calibration hair channel
Number, rCALIt is the response coefficient that channel is received in the calibration, s0The calibration signal that calibration hair channel is sent out；
It when base station sends out downlink signal, is received by first antenna, receives and dispatches access by downlink, at this time the first multiplier,
The downlink is received and dispatched to the penalty coefficient k of accessDLIt is multiplied with the downlink signal, completes the compensation of downlink signal, and will be multiplied
The signal obtained afterwards receives and dispatches access by the downlink and the second antenna is sent to user terminal；
It when user terminal sends out uplink signal, is received by the second antenna, receives and dispatches access by uplink, at this time the second multiplication
The uplink is received and dispatched the penalty coefficient k of access by deviceULIt is multiplied with the uplink signal, completes the compensation of uplink signal, and by phase
The signal obtained after multiplying receives and dispatches access by the uplink and first antenna is sent to the base station.
The method of the present embodiment can carry out school to logical to the uplink transceiver channel and downlink transceiver channel of wireless discharging-directly station
Standard solves in TD-LTE system due to being introduced directly into wireless straight-through station, is generated to the reciprocity of TDD uplink and downlink channels and destroy this
One problem.Further, the downlink signal that base station is sent also is multiplied by this method with the penalty coefficient for down going channel；And
The uplink signal that client terminal is sent is multiplied with the penalty coefficient for data feedback channel, to complete the signal of wireless discharging-directly station
Compensation.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of wireless discharging-directly station, which is characterized in that including：
Downlink receives and dispatches access, for the signal of base station to be sent to user terminal；The downlink receives and dispatches access：Downlink is received logical
Road, and receive the downlink that channel sequence is connect with the downlink and send out channel；
Uplink receives and dispatches access, for the signal of the user terminal to be sent to base station；The uplink receives and dispatches access：Uplink
Channel is received, and receives the uplink that channel sequence is connect with the uplink and sends out channel；
It is set on downlink transmitting-receiving access, and sends out the first multiplier channel attached with the downlink；
It is set on the uplink transmitting-receiving access, and channel attached second multiplier is received with the uplink；Second multiplication
Device is also connect with first multiplier；
The uplink hair channel that the downlink in access is received in channel and uplink transmitting-receiving access is received and dispatched with the downlink respectively to connect
First annular device；
The second circulator being connect respectively with first multiplier and second multiplier；
The first coupler being connect with the first annular device；
The second coupler being connect with second circulator；
Calibration hair channel, is connect by splitter with first coupler, is used for transmission a calibration signal and is received to the downlink
It sends out access or the uplink receives and dispatches access；
Calibration receive channel, connect with second coupler by combiner, be used for transmission by the downlink transmitting-receiving access or
The signal of uplink transmitting-receiving tunnel described in person；
Processor receives channel with the calibration respectively and first multiplier is connect, defeated for receiving channel according to the calibration
The signal gone out obtains the penalty coefficient for the response coefficient for compensating the downlink transmitting-receiving access or uplink transmitting-receiving access；
The signal that channel exports is received in the calibration：The calibration signal is by downlink transmitting-receiving access and the calibration
The first signal exported behind channel and the calibration signal are received after the uplink receives and dispatches access and channel is received in the calibration
The second signal of output；Wherein,
First signal is sDL, wherein：sDL=rCAL·tDL·rDL·tCAL·s0；
The second signal is sUL, wherein：sUL=rCAL·tUL·rUL·tCAL·s0；
Wherein, tDLIt is the response coefficient in downlink hair channel, tULIt is the response coefficient in uplink hair channel, rDLIt is described
Downlink receives the response coefficient in channel, rULIt is the response coefficient that the uplink receives channel, tCALIt is the response system in calibration hair channel
Number, rCALIt is the response coefficient that channel is received in the calibration, s0It is the signal that calibration hair channel is sent out；
When the penalty coefficient that the processor receives and dispatches the response coefficient of access in the downlink is 1, according to formula kUL=sDL/sUL,
Obtain the penalty coefficient k for the response coefficient for compensating the uplink transmitting-receiving accessUL；The compensation of the response coefficient of access is received and dispatched in uplink
When coefficient is 1, according to formula kDL=SUL/SDL, obtain the penalty coefficient k of the response coefficient of the downlink transmitting-receiving accessDL；
First multiplier is used to obtain the penalty coefficient that the downlink receives and dispatches the response coefficient of access from the processor, will
The penalty coefficient and the signal multiplication from the base station of the response coefficient of downlink transmitting-receiving access, and will be obtained after multiplication
Signal is sent to the user terminal；
Second multiplier is used to obtain the penalty coefficient that the uplink receives and dispatches the response coefficient of access from the processor, will
The penalty coefficient and the signal multiplication from the user terminal of the response coefficient of the uplink transmitting-receiving access, and obtained after being multiplied
The signal arrived is sent to the base station.
2. wireless discharging-directly station according to claim 1, which is characterized in that
First coupler receives the signal of the base station, and the signal of the base station is led to for being connect with first antenna
It crosses the downlink transmitting-receiving access and the second antenna is sent to user terminal；
Second coupler receives the signal of the user terminal for being connect with the second antenna, and by the user terminal
Signal access and first antenna received and dispatched by the uplink are sent to the base station.
3. a kind of antenna calibration method of wireless discharging-directly station, the wireless discharging-directly station is as claimed in claim 1 or 2 wireless straight
Put station；It is characterized in that, the method includes：
It transmits a calibration signal and receives and dispatches access or uplink transmitting-receiving access to downlink；
It obtains the calibration signal and sends out the letter that channel output is received in channel, downlink transmitting-receiving access and a calibration by a calibration
Number or the calibration signal by the calibration hair channel, the uplink transmitting-receiving access and the calibration receipts channel export
Signal；
The signal that channel output is received according to the calibration, obtains the compensation downlink transmitting-receiving access or the uplink receives and dispatches access
Response coefficient penalty coefficient；
By the penalty coefficient of the response coefficient of downlink transmitting-receiving access and from the signal multiplication of base station, and will be obtained after multiplication
Signal, be sent to user terminal；Or the uplink is received and dispatched to the penalty coefficient of the response coefficient of access and comes from user's end
The signal multiplication at end, and the signal that will be obtained after multiplication, are sent to base station.
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| CN108540181B (en) * | 2018-03-02 | 2020-04-14 | 京信通信***（中国）有限公司 | Antenna calibration method and device |
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