CN107911178A - A kind of method and device of passage calibration - Google Patents
A kind of method and device of passage calibration Download PDFInfo
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- CN107911178A CN107911178A CN201711123065.5A CN201711123065A CN107911178A CN 107911178 A CN107911178 A CN 107911178A CN 201711123065 A CN201711123065 A CN 201711123065A CN 107911178 A CN107911178 A CN 107911178A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
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Abstract
The invention discloses a kind of method and device of passage calibration, applied to the RRU of multichannel, the multichannel includes passage to be calibrated and reference channel, and method includes：Obtain the calibrating sequence of the passage to be calibrated, and the calibrating sequence of the reference channel；The calibration filter coefficient of the passage to be calibrated is calculated using the frequency domain response between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated；Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；Using the calibrating sequence autocorrelation of the passage to be calibrated, the first time delay value of the passage to be calibrated is obtained, and, using the autocorrelation of the calibrating sequence of the reference channel, obtain the second time delay value of the reference channel；Based on the delay compensation value of the calibration wave filter, first time delay value, and second time delay value obtain the delay inequality between the passage to be calibrated and the reference channel, and delay compensation is carried out to the passage to be calibrated.
Description
Technical field
The present invention relates to field of communication technology, more particularly to a kind of method and device of passage calibration.
Background technology
Sent and received in intelligent multi-antenna technology in the system of loop, different antennae can produce during sending and receiving
Raw certain time delay error, by taking the radio frequency remote unit RRU (Radio Remote Unit) of eight passages as an example, eight of the RRU
Different antennae can produce certain time delay error during sending and receiving in antenna.And since time, temperature, environment change
Become and the aging of device can cause each antenna channels amplitude and phase characteristic inconsistent.
In existing passage collimation technique the difference of interchannel is eliminated by the way of each passage adds calibration wave filter.
However, signal can still produce certain time delay by wave filter.The delay compensation method for calibrating wave filter is rushed using the time domain at 0 moment
Hit response and move time delay, delay compensation is carried out to the signal by calibrating wave filter.In practical applications, the time domain punching at 0 moment
Hit response and move time delay, time delay caused by calibration wave filter can not be matched completely, that is to say, that still suffer from time delay adjustment and miss
Difference.
As it can be seen that the RRU calibration accuracies of multichannel of the prior art are low.
The content of the invention
The embodiment of the present invention provides a kind of method and device of passage calibration, for solving multichannel of the prior art
The low technical problem of RRU calibration accuracies, improves the calibration accuracy of the RRU of multichannel.
On the one hand, an embodiment of the present invention provides a kind of method of passage calibration, the remote radio list applied to multichannel
First RRU, the multichannel include passage to be calibrated and reference channel, including：
Obtain the calibrating sequence of the passage to be calibrated, and the calibrating sequence of the reference channel；
Calculated using the frequency domain response between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
The calibration filter coefficient of the passage to be calibrated, wherein, the calibration filter coefficient is used to characterize the passage to be calibrated
Calibration wave filter；
Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；
Using the calibrating sequence autocorrelation of the passage to be calibrated, the first time delay value of the passage to be calibrated is obtained,
And the autocorrelation of the calibrating sequence using the reference channel, obtain the second time delay value of the reference channel；
Based on the delay compensation value of the calibration wave filter, first time delay value, and second time delay value, obtain institute
The delay inequality between passage to be calibrated and the reference channel is stated, delay compensation is carried out to the passage to be calibrated.
Alternatively, the frequency using between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
Domain response calculates the calibration filter coefficient of the passage to be calibrated, specifically includes：
Carry out frequency-domain transform to the calibrating sequence of the passage to be calibrated, and to the calibrating sequence of the reference channel into
Row frequency-domain transform；
The frequency-domain transform of the reference channel is obtained, and the ratio between the frequency-domain transform of the passage to be calibrated, wherein, institute
State frequency domain response of the ratio for the reference channel and the interchannel to be calibrated；
Fourier inversion is carried out to the frequency domain response and obtains the school of the reference channel and the interchannel to be calibrated
Quasi-divisor；
Based on the calibration factor, the calibration filter coefficient of the acquisition passage to be calibrated.
Alternatively, the calibration filter coefficient for being based on the calibration factor, obtaining the passage to be calibrated, specific bag
Include：
Determine that the calibration factor corresponds to M maximum impact response point, wherein, M maximum impact response point is specially institute
Calibration filter coefficient is stated, M is positive integer；
It is described to utilize the calibration filter coefficient, the delay compensation value of the calibration wave filter is obtained, is specifically included：
Based on the M maximum impact response point, M rank tap delays values are obtained；
Sum to the M ranks tap delays value, obtain the delay compensation value of the calibration wave filter.
Alternatively, the calibration factor is based on described, after the calibration filter coefficient for obtaining the passage to be calibrated,
The method further includes：
Obtain correlation signal；
The correlation signal is done convolution with the calibration factor to be multiplied, obtains convolution results；
It is related that to the correlation signal conjugation is carried out to the convolution results；
Determine the positional information where the relevant highest peak value point of conjugation；
Based on the positional information, the delay compensation value for calibrating wave filter is obtained.
Alternatively, first time delay value for utilizing the calibrating sequence autocorrelation, obtaining the passage to be calibrated, with
And the autocorrelation of the calibrating sequence using the reference channel, the second time delay value of the reference channel is obtained, it is specific to wrap
Include：
Obtain local sequence；
It is related that the calibrating sequence of the passage to be calibrated and the local sequence are subjected to conjugation, it is definite be conjugated it is relevant most
First position information where high peak value point, and, the calibrating sequence of the reference channel and the local sequence are carried out
Conjugation is related, determines the second place information where the relevant highest peak value point of conjugation；
Based on first time delay value of passage to be calibrated described in the first position information acquisition, and, based on described
Second time delay value of reference channel described in the information acquisition of the second place.
Alternatively, in the delay compensation value based on the calibration wave filter, first time delay value, and described second
Time delay value, after obtaining the delay inequality between the passage to be calibrated and the reference channel, the method further includes：
Based on the delay inequality, the passage to be calibrated is calibrated, so that signal is calibrated through the passage to be calibrated
Time delay value afterwards is identical with second time delay value of the reference channel.
On the other hand, the embodiment of the present invention additionally provides a kind of device of passage calibration, and the radio frequency applied to multichannel is drawn
Remote unit R RU, the multichannel include passage to be calibrated and reference channel, including：
Calibrating sequence R-T unit, for obtaining the calibrating sequence of the passage to be calibrated, and the reference channel
Calibrating sequence；
Calibrating installation, is connected with the calibrating sequence R-T unit, is specifically used for：
Calculated using the frequency domain response between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
The calibration filter coefficient of the passage to be calibrated, wherein, the calibration filter coefficient is used to characterize the passage to be calibrated
Calibration wave filter；
Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；
Using the calibrating sequence autocorrelation of the passage to be calibrated, the first time delay value of the passage to be calibrated is obtained,
And the autocorrelation of the calibrating sequence using the reference channel, obtain the second time delay value of the reference channel；
Based on the delay compensation value of the calibration wave filter, first time delay value, and second time delay value, obtain institute
The delay inequality between passage to be calibrated and the reference channel is stated, delay compensation is carried out to the passage to be calibrated.
Alternatively, the calibrating installation is specifically used for：
Carry out frequency-domain transform to the calibrating sequence of the passage to be calibrated, and to the calibrating sequence of the reference channel into
Row frequency-domain transform；
The frequency-domain transform of the reference channel is obtained, and the ratio between the frequency-domain transform of the passage to be calibrated, wherein, institute
State frequency domain response of the ratio for the reference channel and the interchannel to be calibrated；
Fourier inversion is carried out to the frequency domain response and obtains the school of the reference channel and the interchannel to be calibrated
Quasi-divisor；
Based on the calibration factor, the calibration filter coefficient of the acquisition passage to be calibrated.
Alternatively, the calibrating installation is specifically used for：
Determine that the calibration factor corresponds to M maximum impact response point, wherein, M maximum impact response point is specially institute
Calibration filter coefficient is stated, M is positive integer；
It is described to utilize the calibration filter coefficient, the delay compensation value of the calibration wave filter is obtained, is specifically included：
Based on the M maximum impact response point, M rank tap delays values are obtained；
Sum to the M ranks tap delays value, obtain the delay compensation value of the calibration wave filter.
Alternatively, the calibration factor is based on described, after the calibration filter coefficient for obtaining the passage to be calibrated,
The calibrating installation is additionally operable to：
Obtain correlation signal；
The correlation signal is done convolution with the calibration factor to be multiplied, obtains convolution results；
It is related that to the correlation signal conjugation is carried out to the convolution results；
Determine the positional information where the relevant highest peak value point of conjugation；
Based on the positional information, the delay compensation value for calibrating wave filter is obtained.
Alternatively, the calibrating installation is specifically used for：
Obtain local sequence；
It is related that the calibrating sequence of the passage to be calibrated and the local sequence are subjected to conjugation, it is definite be conjugated it is relevant most
First position information where high peak value point, and, the calibrating sequence of the reference channel and the local sequence are carried out
Conjugation is related, determines the second place information where the relevant highest peak value point of conjugation；
Based on first time delay value of passage to be calibrated described in the first position information acquisition, and, based on described
Second time delay value of reference channel described in the information acquisition of the second place.
Alternatively, in the delay compensation value based on the calibration wave filter, first time delay value, and described second
Time delay value, after obtaining the delay inequality between the passage to be calibrated and the reference channel, the calibrating installation is additionally operable to：
Based on the delay inequality, the passage to be calibrated is calibrated, so that signal is calibrated through the passage to be calibrated
Time delay value afterwards is identical with second time delay value of the reference channel.
On the other hand, the embodiment of the present invention additionally provides a kind of computer installation, including memory, processor and is stored in
On the memory and the computer program that can run on the processor, when the processor performs the computer program
The step of realizing the method for passage calibration as described above.
On the other hand, the embodiment of the present invention additionally provides a kind of computer-readable recording medium, is stored thereon with computer
The step of program, the computer program realizes the method for passage calibration as described above when being executed by processor.
Said one or multiple technical solutions in the embodiment of the present invention, at least have following one or more technology effects
Fruit：
In the technical solution of the embodiment of the present invention, by obtaining the calibrating sequence of the passage to be calibrated, and it is described
The calibrating sequence of reference channel；Utilize the frequency between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
Domain response calculates the calibration filter coefficient of the passage to be calibrated, wherein, the calibration filter coefficient is used to characterize described
The calibration wave filter of passage to be calibrated；Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；
Using the calibrating sequence autocorrelation, the first time delay value of the passage to be calibrated is obtained, and, utilize the reference channel
Calibrating sequence autocorrelation, obtain the second time delay value of the reference channel；Time delay based on the calibration wave filter is mended
Value, first time delay value, and second time delay value are repaid, obtains the time delay between the passage to be calibrated and the reference channel
Difference, delay compensation is carried out to the passage to be calibrated.That is, directly using interchannel calibrating sequence frequency domain response and then
The calibration filter coefficient of passage to be calibrated is obtained, further, obtains the delay compensation value of calibration wave filter；Then, school is utilized
The delay compensation value of quasi- sequence self correlation and calibration wave filter, and then try to achieve the time delay between passage and reference channel to be calibrated
Difference, so as to be compensated to the time delay of the passage to be calibrated, further such that signal is after the passage calibration to be calibrated
Time delay value is identical with the time delay value of the reference channel, and the RRU calibration accuracies for efficiently solving multichannel of the prior art are low
Technical problem, improve the calibration accuracy of the RRU of multichannel.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment.
Fig. 1 is a kind of step flow chart of the method for passage calibration provided in the embodiment of the present invention one；
Fig. 2 is the RRU rings that a kind of passage for providing calibrates eight passages in the method for delay compensation in the embodiment of the present invention one
The composition schematic diagram on road；
Fig. 3 is the step flow chart of step S102 in the method that a kind of passage provided in the embodiment of the present invention one is calibrated；
Fig. 4 is the step flow chart of step S103 in the method that a kind of passage provided in the embodiment of the present invention one is calibrated；
Fig. 5 is to be flowed in a kind of method of passage calibration provided in the embodiment of the present invention one after step S304 the step of
Cheng Tu；
Fig. 6 is the step of a kind of passage for providing calibrates step S104 in the method for delay compensation in the embodiment of the present invention one
Flow chart；
Fig. 7 is a kind of structure diagram of the device of passage calibration provided in the embodiment of the present invention two；
Fig. 8 is a kind of structure diagram of the device of passage calibration provided in the embodiment of the present invention three.
Embodiment
The embodiment of the present invention provides a kind of method and device of passage calibration, for solving multichannel of the prior art
The low technical problem of RRU calibration accuracies, improves the calibration accuracy of the RRU of multichannel.
For technical solution in the embodiment of the present invention to solve above-mentioned technical problem, general thought is as follows：
A kind of method of passage calibration, applied to the radio frequency remote unit RRU of multichannel, the multichannel includes to be calibrated
Passage and reference channel, including：
Obtain the calibrating sequence of the passage to be calibrated, and the calibrating sequence of the reference channel；
Calculated using the frequency domain response between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
The calibration filter coefficient of the passage to be calibrated, wherein, the calibration filter coefficient is used to characterize the passage to be calibrated
Calibration wave filter；
Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；
Using the calibrating sequence autocorrelation of the passage to be calibrated, the first time delay value of the passage to be calibrated is obtained,
And the autocorrelation of the calibrating sequence using the reference channel, obtain the second time delay value of the reference channel；
Based on the delay compensation value of the calibration wave filter, first time delay value, and second time delay value, obtain institute
The delay inequality between passage to be calibrated and the reference channel is stated, delay compensation is carried out to the passage to be calibrated.
In the technical solution of the embodiment of the present invention, by obtaining the calibrating sequence of the passage to be calibrated, and it is described
The calibrating sequence of reference channel；Utilize the frequency between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
Domain response calculates the calibration filter coefficient of the passage to be calibrated, wherein, the calibration filter coefficient is used to characterize described
The calibration wave filter of passage to be calibrated；Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；
Using the calibrating sequence autocorrelation, the first time delay value of the passage to be calibrated is obtained, and, utilize the reference channel
Calibrating sequence autocorrelation, obtain the second time delay value of the reference channel；Time delay based on the calibration wave filter
Offset, first time delay value, and second time delay value, obtain between the passage to be calibrated and the reference channel when
Prolong difference, delay compensation is carried out to the passage to be calibrated.That is, directly using interchannel calibrating sequence frequency domain response into
And the calibration filter coefficient of passage to be calibrated is obtained, further, obtain the delay compensation value of calibration wave filter；Then, utilize
The delay compensation value of calibrating sequence autocorrelation and calibration wave filter, and then try to achieve the time delay between passage and reference channel to be calibrated
Difference, so as to be compensated to the time delay of the passage to be calibrated, further such that signal is after the passage calibration to be calibrated
Time delay value is identical with the time delay value of the reference channel, and the RRU calibration accuracies for efficiently solving multichannel of the prior art are low
Technical problem, improve the calibration accuracy of the RRU of multichannel.
In order to better understand the above technical scheme, below by attached drawing and specific embodiment to technical solution of the present invention
It is described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the detailed of technical solution of the present invention
Thin explanation, rather than the restriction to technical solution of the present invention, in the case where there is no conflict, the embodiment of the present invention and embodiment
In technical characteristic can be combined with each other.
Embodiment one
Please refer to Fig.1, the embodiment of the present invention one provides a kind of method of passage calibration, is zoomed out applied to multi-channel radio frequency
Unit R RU, the multichannel include passage to be calibrated and reference channel, and the reference channel is chosen from the multichannel
Any one passage, including：
S101：Obtain the calibrating sequence of the passage to be calibrated, and the calibrating sequence of the reference channel；
S102：Utilize the frequency domain response between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
The calibration filter coefficient of the passage to be calibrated is calculated, wherein, the calibration filter coefficient is used to characterize described to be calibrated
The calibration wave filter of passage；
S103：Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；
S104：Using the calibrating sequence autocorrelation of the passage to be calibrated, when obtaining the first of the passage to be calibrated
Prolong value, and, using the autocorrelation of the calibrating sequence of the reference channel, obtain the second time delay value of the reference channel；
S105：Based on the delay compensation value of the calibration wave filter, first time delay value, and second time delay value,
The delay inequality between the passage to be calibrated and the reference channel is obtained, delay compensation is carried out to the passage to be calibrated.
In specific implementation process, step S101 to step S105's the specific implementation process is as follows：
First, step S103 and sequencings of the step S104 without execution, those skilled in the art can be as needed
To perform corresponding step.It illustrate only the situation that execution of step S103 performs step S104 afterwards in Fig. 1.Specifically,
The calibrating sequence is specifically as follows ZC (Zadoff-Chu) sequence, can also be PN sequences, etc..In specific implementation process
In, it can regard any one sequence therein as the calibrating sequence by the use of the characteristic of PN sequences and ZC sequences.With eight passages
Exemplified by RRU, the calibrating sequence length is N, and the calibrating sequence of each channel reception is xi, i ∈ [1,8], wherein, subscript
I represents i-th of passage.
Then, the frequency domain response between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated is utilized
Calculate the calibration filter coefficient of the passage to be calibrated.Specifically, using the reference channel calibrating sequence with it is described
Frequency domain response between the calibrating sequence of passage to be calibrated calculates the calibration filter coefficient of the passage to be calibrated, wherein, it is described
Calibration filter coefficient is used for the calibration wave filter for characterizing the passage to be calibrated.Then, be utilized respectively the reference channel and
The frequency domain response of the interchannel to be calibrated determines the calibration filter coefficient of the passage to be calibrated, wherein, the calibration
Filter coefficient is used for the calibration wave filter for characterizing the passage to be calibrated.Further, using the calibration filter coefficient,
Obtain the delay compensation value of the calibration wave filter, that is to say, that when acquisition signal is caused after the calibration wave filter
Prolong value.Further, using the autocorrelation of the calibrating sequence, the passage to be calibrated and the reference channel are obtained respectively
Time delay value.Further, the delay inequality between the passage to be calibrated and the reference channel is obtained, and then to described to be calibrated
Passage carries out delay compensation, so that time delay caused by compensate for the calibration wave filter, effectively increases the RRU's of multichannel
Calibration accuracy.
Please refer to Fig.2, the composition schematic diagram of the RRU loop of eight passages, wherein, RX/TX represents the radio-frequency receiving-transmitting end of RRU,
Shared eight radio frequencies of RX1/TX1, RX2/TX2, RX3/TX3, RX4/TX4, RX5/TX5, RX6/TX6, RX7/TX7, RX8/TX8 are received
Originator, RX correspond to radio frequency reception end, and TX corresponds to radio-frequency transmissions end, has eight transceiver channels in the RRU loop of eight passage, often
One such as low-noise amplifier (Low Noise Amplifier, i.e. LNA) or power amplification is at least set on a transceiver channel
The power amplifier module of device (Power Amplifier, i.e. PA), wherein, the low-noise amplifier can be used for carrying out uplink signal
Amplification, the power amplifier can be used for being amplified downlink signal.Through each transceiver channel by signal through in respective channel
Power amplifier module send it to coupler, the signal that the coupler can send over multichannel is through same calibrated channel
Send to corresponding radio frequency reception end.
In embodiments of the present invention, the transmitting procedure of the calibrating sequence of each passage of the RRU is as follows：
First, the radio-frequency transmissions end of the RRU in each radio-frequency receiving-transmitting passage sends calibrating sequence；Then, the school
Quasi- sequence via after power amplifier module to the coupler, after the coupler by the corresponding radio frequency reception of same calibrated channel
End receives the calibrating sequence.That is, the calibrating sequence through the passage to be calibrated and the reference channel respectively, is passing through
The radio frequency reception end is transmitted to by same calibrated channel after the coupler.
For giving a concrete illustration, in the downlink of the RRU, radio-frequency transmissions end TX1~TX8 sends calibration
Sequence, each calibrating sequence through the coupler by same calibrated channel, by the radio frequency reception end RX1 of same calibrated channel
Receive.It can also be that each calibrating sequence by the calibrated channel, is received through the coupler by radio frequency reception end RX2, when
So, the calibrating sequence through the coupler by the calibrated channel, can also be by penetrating in addition to radio frequency reception end RX1 and RX2
Any one radio frequency reception end in frequency receiving terminal RX3~RX8 receives, and does not just repeat one by one herein.For another example, in the RRU
Uplink in, radio-frequency transmissions end TX1 sends calibrating sequence x1, the calibrating sequence is logical by the calibration through the coupler
Behind road, received via radio frequency reception end RX1~RX8.It can also be that radio-frequency transmissions end TX2 sends the calibrating sequence, the calibration sequence
Row via the coupler by the calibrated channel after, via radio frequency reception end RX1~RX8 receive.It is, of course, also possible to it is to remove
Any one radio-frequency transmissions end in other TX3~TX8 outside radio-frequency transmissions end TX1 and TX2 sends the calibrating sequence.When
So, those skilled in the art can select radio frequency reception end and radio-frequency transmissions end according to being actually needed, and just differ herein
One has been illustrated.
In addition, to those skilled in the art, can also be according to actual needs to other letters in addition to calibrating sequence
Number transmitting procedure be controlled, such as, LTE signals through the passage to be calibrated, and another LTE through the reference channel
Signal, can be transmitted to the radio frequency reception end after the coupler by same calibrated channel.It is, of course, also possible to it is other
Signal, just do not repeat one by one herein.
In embodiments of the present invention, please refer to Fig.3, step S102：Calculated using the frequency domain response of interchannel calibrating sequence
The calibration filter coefficient of the passage to be calibrated, specifically includes：
S301：Frequency-domain transform, and the calibration to the reference channel are carried out to the calibrating sequence of the passage to be calibrated
Sequence carries out frequency-domain transform；
S302：The frequency-domain transform of the reference channel is obtained, and the ratio between the frequency-domain transform of the passage to be calibrated, its
In, the ratio is the reference channel and the frequency domain response of the interchannel to be calibrated；
S303：Fourier inversion is carried out to the frequency domain response and obtains the reference channel and the interchannel to be calibrated
Calibration factor；
S304：Based on the calibration factor, the calibration filter coefficient of the acquisition passage to be calibrated.
In specific implementation process, the step S301 to step S304's the specific implementation process is as follows：
By taking the RRU of eight passages as an example, first, respectively to the calibrating sequence of the passage to be calibrated and the reference channel into
Row frequency-domain transform.Specifically, the calibrating sequence of passage i is carried out N points DFT (Discrete Fourier Transform, from
Dissipate Fourier transformation), obtain
Any passage is chosen as passage is referred to, the frequency-domain transform of reference channel is expressed as Xref, the frequency domain of passage to be calibrated
Conversion is expressed as Xi。
Then, the ratio between the frequency-domain transform based on the reference channel, with the frequency-domain transform of the passage to be calibrated, is obtained
The frequency domain response of the reference channel and the interchannel to be calibrated is obtained, that is, asks for the reference channel and the passage to be calibrated
Between frequency domain response H,
To the frequency domain response H of reference channel and passage i to be calibrated, carry out Fourier inversion obtain the reference channel with
The interchannel calibration factor ht to be calibratedi
It is respectively [h (0), h (1) ... h (A-1)] to have A maximum impact response point in ht (n) the first half RB sampled points, is taken out
Head time delay is [TA(0), TA(1),...,TA(A-1)]；It is respectively [h to have B maximum impact response point in later half BR sampled points
(N-B+1), h (N-B+2) ..., h (N)], A+B=M, tap delays are [TB(0), TB(1),...,TB(B-1)].Form [h
(N-B+1), h (N-B+2) ..., h (N), h (0), h (1) ..., h (A-1)] wave filter is the wave filter to be calibrated
Calibrate filter coefficient.M ranks tap coefficient can be adaptively selected according to system resource situation.
Step S304：Based on the calibration factor, the calibration filter coefficient of the passage to be calibrated is obtained, it is specific to wrap
Include：Determine that the calibration factor corresponds to M maximum impact response point, wherein, M maximum impact response point is specially the calibration
Filter coefficient, M are positive integer, have been carried out being described in detail above, are not just being repeated here.
In specific implementation process, please refer to Fig.4, step S103：Using the calibration filter coefficient, the school is obtained
The delay compensation value of quasi- wave filter, specifically includes：
S401：Based on the M maximum impact response point, M rank tap delays values are obtained；
S402：Sum to the M ranks tap delays value, obtain the delay compensation value of the calibration wave filter.
In specific implementation process, step S401 to step S402's the specific implementation process is as follows：
After M above-mentioned maximum impact response point is determined, M rank tap delays values are obtained, are specially Tcoe=[TB(0),TB
(1),…TB(B-1),TA(0),TA(1),…TA(A-1)].Then, sum to the M ranks tap delays value, described in acquisition
Calibrate the delay compensation value of wave filter.Specifically, the delay compensation value of the calibration wave filter is：
In embodiments of the present invention, except it is above-mentioned use summed based on tap coefficient method and obtain the calibration wave filter
The delay compensation value outside, can also be asked for according to signal correlation method, specifically, refer to Fig. 5, in step S304：
Based on the calibration factor, after the calibration filter coefficient for obtaining the passage to be calibrated, the method further includes：
S501：Obtain correlation signal；
S502：The correlation signal is done convolution with the calibration factor to be multiplied, obtains convolution results；
S503：It is related that to the correlation signal conjugation is carried out to the convolution results；
S504：Determine the positional information where the relevant highest peak value point of conjugation；
S505：Based on the positional information, the delay compensation value for calibrating wave filter is obtained.
In specific implementation process, step S501 to step S505's the specific implementation process is as follows：
In order to determine that how many delay skew signal after the calibration wave filter, understand, first, one section of generation is with calibrating
Sequence xiCorrelation signal l (n) identical or different symbol lengths N, wherein, l (n) can be the calibrating sequence, also may be used
To be LTE signals, etc..In specific implementation process, l (n) and h (n) are done into convolution and are multiplied, obtain convolution results y (n)：
Y (n)=l (n) * h (n)
Convolution results y (n) is related to signal l (n) conjugation：
Ask for the positional information where relevant peak value point：
(Tfil, value) and=max (Rly)
Further determine that the positional information being conjugated where relevant highest peak value point, based on the positional information, obtain
The delay compensation value T of the calibration wave filterfil.Certainly, for those skilled in the art, except above two
Outside the delay compensation value for asking for the calibration wave filter, the calibration can also be asked for using other manner as needed
The delay compensation value of wave filter, just differ one has been illustrated herein.
In embodiments of the present invention, Fig. 6, step S104 be refer to：Using the calibrating sequence of the passage to be calibrated from phase
Guan Xing, obtains the first time delay value of the passage to be calibrated, and, utilize the auto-correlation of the calibrating sequence of the reference channel
Property, the second time delay value of the reference channel is obtained, is specifically included：
S601：Obtain local sequence；
S602：It is related that the calibrating sequence of the passage to be calibrated and the local sequence are subjected to conjugation, it is definite to be conjugated phase
First position information where the highest peak value point of pass, and, by the calibrating sequence of the reference channel and the local sequence
Row carry out conjugation correlation, determine the second place information where the relevant highest peak value point of conjugation；
S603：The positional information where the relevant highest peak value point of conjugation is determined respectively；
S604：Obtain first time delay value of the passage to be calibrated and second time delay of the reference channel
Value.
In specific implementation process, step S601 to step S604's the specific implementation process is as follows：
First, one section and calibrating sequence x are generatediThe identical local sequence z (n) of symbol lengths, carries out time-delay calibration.Calibration
Sequence xi, it is related that i ∈ [1,8] carry out conjugation to local sequence z (n) respectively：
Ask for the positional information where relevant peak value point：
(Ti, value) and=max (Rzx)
Further determine that the positional information being conjugated where relevant highest peak value point, based on the positional information, obtain
The delay compensation value of the calibration wave filter.Specifically, TiAs current passage i time delay values to be calibrated, based on same
Realize process, the time delay value for determining the reference channel is Tref。
In embodiments of the present invention, in step S104：Using the calibrating sequence autocorrelation of the passage to be calibrated, obtain
First time delay value of the passage to be calibrated, and, using the autocorrelation of the calibrating sequence of the reference channel, described in acquisition
After second time delay value of reference channel, the method further includes：Based on the delay inequality, school is carried out to the passage to be calibrated
Standard, so that time delay value of the signal after the passage calibration to be calibrated is identical with second time delay value of the reference channel.
Specifically, the delay compensation value of the calibration wave filter, first time delay value, and institute are obtained based on above-mentioned method
After stating the second time delay value, the acquisition pattern based on above two to the delay compensation value of the calibration wave filter is corresponding
In the first acquisition pattern, the delay inequality between the passage to be calibrated and the reference channel is：Delay=reTf-i-
TTf；In second of acquisition pattern, the delay inequality between the passage to be calibrated and the reference channel is：Delay=Tref-Ti-
Tfil.Then, based on the delay inequality, the passage to be calibrated is calibrated, finally so that signal is through the passage to be calibrated
Time delay value after calibration is identical with second time delay value of the reference channel, it is achieved thereby that the time delay between multichannel is mended
Repay, and effectively increase the precision of time-delay calibration between multichannel.
In embodiments of the present invention, in step S102：Using the reference channel calibrating sequence with it is described to be calibrated logical
After frequency domain response between the calibrating sequence in road calculates the calibration filter coefficient of the passage to be calibrated, it can also be treated to described
Calibrated channel and makes all passages to be calibrated be calibrated to the width of same passage (reference channel) into the compensation of line amplitude, phase
Spend phase, that is to say, that the amplitude-phase of amplitude-phase and the reference channel after the passage to be calibrated is calibrated tends to
Unanimously.Further, in inventive embodiments of the present invention, using the calibrating sequence of interchannel not only compensate for interchannel when
Prolong, and also compensates for the amplitude and phase difference of interchannel, improve the precision of RRU loop.
Embodiment two
Based on the inventive concept same with the embodiment of the present application one, Fig. 7 is refer to, the embodiment of the present invention two additionally provides one
The device of kind passage calibration, applied to multi-channel radio remote unit RRU, the multichannel includes passage to be calibrated and with reference to logical
Road, including：
Calibrating sequence R-T unit 10, for obtaining the calibrating sequence of the passage to be calibrated, and the reference channel
Calibrating sequence；
Calibrating installation 20, is connected with calibrating sequence R-T unit 10, is specifically used for：
Calculated using the frequency domain response between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
The calibration filter coefficient of the passage to be calibrated, wherein, the calibration filter coefficient is used to characterize the passage to be calibrated
Calibration wave filter；
Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；
Using the calibrating sequence autocorrelation, the first time delay value and the reference for obtaining the passage to be calibrated are logical
Second time delay value in road；
Based on the delay compensation value of the calibration wave filter, first time delay value, and second time delay value, obtain institute
The delay inequality between passage to be calibrated and the reference channel is stated, delay compensation is carried out to the passage to be calibrated.
In embodiments of the present invention, calibrating installation 20 is specifically used for：
Carry out frequency-domain transform to the calibrating sequence of the passage to be calibrated, and to the calibrating sequence of the reference channel into
Row frequency-domain transform；
The frequency-domain transform of the reference channel is obtained, and the ratio between the frequency-domain transform of the passage to be calibrated, wherein, institute
State frequency domain response of the ratio for the reference channel and the interchannel to be calibrated；
Fourier inversion is carried out to the frequency domain response and obtains the school of the reference channel and the interchannel to be calibrated
Quasi-divisor；
Based on the calibration factor, the calibration filter coefficient of the acquisition passage to be calibrated.
In embodiments of the present invention, calibrating installation 20 is specifically used for：
Determine that the calibration factor corresponds to M maximum impact response point, wherein, M maximum impact response point is specially institute
Calibration filter coefficient is stated, M is positive integer；
It is described to utilize the calibration filter coefficient, the delay compensation value of the calibration wave filter is obtained, is specifically included：
Based on the M maximum impact response point, M rank tap delays values are obtained；
Sum to the M ranks tap delays value, obtain the delay compensation value of the calibration wave filter.
In embodiments of the present invention, the calibration factor is based on described, obtains the calibration filtering of the passage to be calibrated
After device coefficient, the calibrating installation is additionally operable to：
Obtain correlation signal；
The correlation signal is done convolution with the calibration factor to be multiplied, obtains convolution results；
It is related that to the correlation signal conjugation is carried out to the convolution results；
Determine the positional information where the relevant highest peak value point of conjugation；
Based on the positional information, the delay compensation value for calibrating wave filter is obtained.
In embodiments of the present invention, calibrating installation 20 is specifically used for：
Obtain local sequence；
It is related that the calibrating sequence of the passage to be calibrated and the local sequence are subjected to conjugation, it is definite be conjugated it is relevant most
First position information where high peak value point, and, the calibrating sequence of the reference channel and the local sequence are carried out
Conjugation is related, determines the second place information where the relevant highest peak value point of conjugation；
Based on first time delay value of passage to be calibrated described in the first position information acquisition, and, based on described
Second time delay value of reference channel described in the information acquisition of the second place.
In embodiments of the present invention, it is described based on it is described calibration wave filter delay compensation value, first time delay value,
With second time delay value, after obtaining the delay inequality between the passage to be calibrated and the reference channel, calibrating installation 20 is also
For：
Based on the delay inequality, the passage to be calibrated is calibrated, so that signal is calibrated through the passage to be calibrated
Time delay value afterwards is identical with second time delay value of the reference channel.
Embodiment three
Based on the inventive concept same with the embodiment of the present invention one, Fig. 8 is refer to, the embodiment of the present invention additionally provides one kind
Passage calibration device, applied to the radio frequency remote unit RRU of multichannel, the multichannel include passage to be calibrated and with reference
Passage, including：
Acquiring unit 30, for obtaining the calibrating sequence of the passage to be calibrated, and the calibration sequence of the reference channel
Row；
Computing unit 40, utilizes the frequency between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
Domain response calculates the calibration filter coefficient of the passage to be calibrated, wherein, the calibration filter coefficient is used to characterize described
The calibration wave filter of passage to be calibrated；
First obtains unit 50, using the calibration filter coefficient, obtains the delay compensation value for calibrating wave filter；
Second obtaining unit 60, using the calibrating sequence autocorrelation of the passage to be calibrated, obtains described to be calibrated logical
First time delay value in road, and, using the autocorrelation of the calibrating sequence of the reference channel, obtain the of the reference channel
Two time delay values；
3rd obtaining unit 70, based on the delay compensation value of the calibration wave filter, first time delay value, and described the
Two time delay values, obtain the delay inequality between the passage to be calibrated and the reference channel, and time delay is carried out to the passage to be calibrated
Compensation.
In embodiments of the present invention, computing unit 40 is specifically used for：
Carry out frequency-domain transform to the calibrating sequence of the passage to be calibrated, and to the calibrating sequence of the reference channel into
Row frequency-domain transform；
The frequency-domain transform of the reference channel is obtained, and the ratio between the frequency-domain transform of the passage to be calibrated, wherein, institute
State frequency domain response of the ratio for the reference channel and the interchannel to be calibrated；
Fourier inversion is carried out to the frequency domain response and obtains the school of the reference channel and the interchannel to be calibrated
Quasi-divisor；
Based on the calibration factor, the calibration filter coefficient of the acquisition passage to be calibrated.
In embodiments of the present invention, it is specifically used in computing unit 40：
Determine that the calibration factor corresponds to M maximum impact response point, wherein, M maximum impact response point is specially institute
Calibration filter coefficient is stated, M is positive integer；
First obtains unit 50 is specifically used for：
Based on the M maximum impact response point, M rank tap delays values are obtained；
Sum to the M ranks tap delays value, obtain the delay compensation value of the calibration wave filter.
In embodiments of the present invention, described device further includes：
4th obtaining unit, for obtaining correlation signal；
First processing units, are specifically used for：
The correlation signal is done convolution with the calibration factor to be multiplied, obtains convolution results；
It is related that to the correlation signal conjugation is carried out to the convolution results；
Determine the positional information where the relevant highest peak value point of conjugation；
Based on the positional information, the delay compensation value for calibrating wave filter is obtained.
In embodiments of the present invention, the second obtaining unit 60 is specifically used for：
Obtain local sequence；
It is related that the calibrating sequence of the passage to be calibrated and the local sequence are subjected to conjugation, it is definite be conjugated it is relevant most
First position information where high peak value point, and, the calibrating sequence of the reference channel and the local sequence are carried out
Conjugation is related, determines the second place information where the relevant highest peak value point of conjugation；
Based on first time delay value of passage to be calibrated described in the first position information acquisition, and, based on described
Second time delay value of reference channel described in the information acquisition of the second place.
In embodiments of the present invention, it is described based on it is described calibration wave filter delay compensation value, first time delay value,
With second time delay value, after obtaining the delay inequality between the passage to be calibrated and the reference channel, described device is also wrapped
Include：
Alignment unit, based on the delay inequality, calibrates the passage to be calibrated, so that signal is through described to be calibrated
Time delay value after passage calibration is identical with second time delay value of the reference channel.
The another aspect of the embodiment of the present invention provides a kind of computer installation, in specific implementation process, the calculating
Machine device includes memory, processor and is stored in the computer journey that can be run on the memory and on the processor
Sequence, the processor realize the method described in each side as described above when performing the computer program.
The another aspect of the embodiment of the present invention provides a kind of computer-readable recording medium, is stored thereon with computer journey
Sequence, the computer program realize the method described in each side as described above when being executed by processor.
Said one or multiple technical solutions in the embodiment of the present invention, at least have following one or more technology effects
Fruit：
In the technical solution of the embodiment of the present invention, by obtaining calibrating sequence；The calibrating sequence of the passage to be calibrated,
And the calibrating sequence of the reference channel；Utilize the calibration sequence of the calibrating sequence and the passage to be calibrated of the reference channel
Frequency domain response between row calculates the calibration filter coefficient of the passage to be calibrated, wherein, the calibration filter coefficient is used for
Characterize the calibration wave filter of the passage to be calibrated；Using the calibration filter coefficient, obtain the calibration wave filter when
Prolong offset；Using the calibrating sequence autocorrelation, the first time delay value of the passage to be calibrated is obtained, and, utilize institute
The autocorrelation of the calibrating sequence of reference channel is stated, obtains the second time delay value of the reference channel；Based on the calibration filtering
The delay compensation value of device, first time delay value, and second time delay value, obtain the passage to be calibrated with described with reference to logical
Delay inequality between road, delay compensation is carried out to the passage to be calibrated.That is, directly utilize the frequency of interchannel calibrating sequence
Domain response and then the calibration filter coefficient for obtaining passage to be calibrated, further, obtain the delay compensation value of calibration wave filter；So
Afterwards, using the delay compensation value of calibrating sequence autocorrelation and calibration wave filter, and then passage and reference channel to be calibrated are tried to achieve
Between delay inequality, so as to be compensated to the time delay of the passage to be calibrated, further such that signal is through the passage to be calibrated
Time delay value after calibration is identical with the time delay value of the reference channel, efficiently solves the RRU schools of multichannel of the prior art
The low technical problem of quasi- precision, improves the calibration accuracy of the RRU of multichannel.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make these embodiments other change and modification.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and scope.In this way, if these modifications and changes of the present invention belongs to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these modification and variations.
Claims (10)
1. a kind of method of passage calibration, applied to the radio frequency remote unit RRU of multichannel, the multichannel includes to be calibrated logical
Road and reference channel, it is characterised in that including：
Obtain the calibrating sequence of the passage to be calibrated, and the calibrating sequence of the reference channel；
Using described in the frequency domain response calculating between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
The calibration filter coefficient of passage to be calibrated, wherein, the calibration filter coefficient is used for the school for characterizing the passage to be calibrated
Quasi- wave filter；
Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；
Using the calibrating sequence autocorrelation of the passage to be calibrated, the first time delay value of the passage to be calibrated is obtained, and,
Using the autocorrelation of the calibrating sequence of the reference channel, the second time delay value of the reference channel is obtained；
Based on the delay compensation value of the calibration wave filter, first time delay value, and second time delay value, is treated described in acquisition
Delay inequality between calibrated channel and the reference channel, delay compensation is carried out to the passage to be calibrated.
2. the method as described in claim 1, it is characterised in that the calibrating sequence using the reference channel is treated with described
Frequency domain response between the calibrating sequence of calibrated channel calculates the calibration filter coefficient of the passage to be calibrated, specifically includes：
Carry out frequency-domain transform to the calibrating sequence of the passage to be calibrated, and to the calibrating sequence of the reference channel into line frequency
Domain converts；
The frequency-domain transform of the reference channel is obtained, and the ratio between the frequency-domain transform of the passage to be calibrated, wherein, the ratio
It is worth the frequency domain response for the reference channel and the interchannel to be calibrated；
The frequency domain response is carried out Fourier inversion obtain the calibration of the reference channel and the interchannel to be calibrated because
Son；
Based on the calibration factor, the calibration filter coefficient of the acquisition passage to be calibrated.
3. method as claimed in claim 2, it is characterised in that it is described to be based on the calibration factor, obtain described to be calibrated logical
The calibration filter coefficient in road, specifically includes：
Determine that the calibration factor corresponds to M maximum impact response point, wherein, M maximum impact response point is specially the school
Quasi- filter coefficient, M are positive integer；
It is described to utilize the calibration filter coefficient, the delay compensation value of the calibration wave filter is obtained, is specifically included：
Based on the M maximum impact response point, M rank tap delays values are obtained；
Sum to the M ranks tap delays value, obtain the delay compensation value of the calibration wave filter.
4. method as claimed in claim 2, it is characterised in that be based on the calibration factor described, obtain described to be calibrated
After the calibration filter coefficient of passage, the method further includes：
Obtain correlation signal；
The correlation signal is done convolution with the calibration factor to be multiplied, obtains convolution results；
It is related that to the correlation signal conjugation is carried out to the convolution results；
Determine the positional information where the relevant highest peak value point of conjugation；
Based on the positional information, the delay compensation value for calibrating wave filter is obtained.
5. the method as described in claim 1, it is characterised in that the calibrating sequence auto-correlation using the passage to be calibrated
Property, the first time delay value of the passage to be calibrated is obtained, and, using the autocorrelation of the calibrating sequence of the reference channel,
The second time delay value of the reference channel is obtained, is specifically included：
Obtain local sequence；
It is related that the calibrating sequence of the passage to be calibrated and the local sequence are subjected to conjugation, determine to be conjugated relevant highest height
First position information where peak point, and, the calibrating sequence of the reference channel and the local sequence are conjugated
Correlation, determines the second place information where the relevant highest peak value point of conjugation；
Based on first time delay value of passage to be calibrated described in the first position information acquisition, and, based on described second
Positional information obtains second time delay value of the reference channel.
6. the method as described in any claims of claim 1-5, it is characterised in that it is described based on it is described calibration wave filter when
Prolong offset, first time delay value, and second time delay value, obtain between the passage to be calibrated and the reference channel
After delay inequality, the method further includes：
Based on the delay inequality, the passage to be calibrated is calibrated, so that signal is after the passage calibration to be calibrated
Time delay value is identical with second time delay value of the reference channel.
7. a kind of device of passage calibration, applied to the radio frequency remote unit RRU of multichannel, the multichannel includes to be calibrated logical
Road and and reference channel, it is characterised in that including：
Calibrating sequence R-T unit, for obtaining the calibrating sequence of the passage to be calibrated, and the calibration of the reference channel
Sequence；
Calibrating installation, is connected with the calibrating sequence R-T unit, is specifically used for：
Using described in the frequency domain response calculating between the calibrating sequence of the reference channel and the calibrating sequence of the passage to be calibrated
The calibration filter coefficient of passage to be calibrated, wherein, the calibration filter coefficient is used for the school for characterizing the passage to be calibrated
Quasi- wave filter；
Using the calibration filter coefficient, the delay compensation value for calibrating wave filter is obtained；
Using the calibrating sequence autocorrelation of the passage to be calibrated, the first time delay value of the passage to be calibrated is obtained, and,
Using the autocorrelation of the calibrating sequence of the reference channel, the second time delay value of the reference channel is obtained；
Based on the delay compensation value of the calibration wave filter, first time delay value, and second time delay value, is treated described in acquisition
Delay inequality between calibrated channel and the reference channel, delay compensation is carried out to the passage to be calibrated.
8. device as claimed in claim 7, it is characterised in that the calibrating installation is specifically used for：
Carry out frequency-domain transform to the calibrating sequence of the passage to be calibrated, and to the calibrating sequence of the reference channel into line frequency
Domain converts；
The frequency-domain transform of the reference channel is obtained, and the ratio between the frequency-domain transform of the passage to be calibrated, wherein, the ratio
It is worth the frequency domain response for the reference channel and the interchannel to be calibrated；
The frequency domain response is carried out Fourier inversion obtain the calibration of the reference channel and the interchannel to be calibrated because
Son；
Based on the calibration factor, the calibration filter coefficient of the acquisition passage to be calibrated.
9. a kind of computer installation, including memory, processor and it is stored on the memory and can be on the processor
The computer program of operation, it is characterised in that the processor realizes claim 1 to 6 times when performing the computer program
The step of one claim the method.
10. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the computer program
The step of any one of claim 1 to 6 the method is realized when being executed by processor.
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| CN107911178B (en) | 2020-01-14 |
| WO2019096010A1 (en) | 2019-05-23 |
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